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In car modification culture, every detail is a tribute to speed and aesthetics. As the link between mechanical performance and visual art, screws, seemingly small components, are being redefined by Ningbo Yijun Technology Co., Ltd. through disruptive innovation. Recently, Yijun Technology launched its customized TC4 high-precision titanium alloy screws specifically for modified cars. With its aerospace-grade materials, CNC precision craftsmanship, and diverse aesthetic design, it has become a new favorite in the high-end modification market, opening up new possibilities for the details of engine bays and wheels. Traditional modification screws mostly use steel or aluminum alloy, but Ningbo Yijun has taken a unique approach, choosing TC4 titanium alloy as its core material. This metal, commonly used in the aerospace field, combines high strength and lightweight characteristics: its tensile strength can reach over 1000MPa, three times that of ordinary aluminum alloy, while its density is only 60% of that of steel. This means that under extreme torque and vibration, TC4 screws offer a more robust connection with a lighter weight, significantly reducing vehicle unsprung mass and improving handling response. Meanwhile, titanium alloys have far superior corrosion resistance compared to traditional metals, maintaining structural stability even after prolonged exposure to high temperatures, salt spray, or chemical cleaning agents, providing lasting safety for modified vehicles. If the material is the "skeleton" of the screw, then the craftsmanship is its "soul." Ningbo Yijun uses top-of-the-line CNC machine tools to perform precision machining on every screw throughout the entire process. From the start and end angles of the thread to the depth accuracy of the tooth profile, everything is controlled within ±0.01mm, ensuring a perfect fit with the nut and eliminating the risk of loosening. Even more commendable is that the CNC process enables the integrated molding of complex structures, eliminating the need for secondary grinding or splicing. This improves assembly efficiency and gives the screw a mirror-like, smooth surface, making it a hidden mechanical work of art in the engine compartment. Beyond meeting performance requirements, Ningbo Yijun further uses surface treatment technology to give the screws a personalized expression. The bluing process uses high-temperature oxidation to create a deep blue coating, offering both corrosion resistance and understated luxury. The original brushed finish retains the natural color of the titanium alloy, highlighting its industrial texture with delicate patterns. Gold and iridescent coatings, achieved through physical vapor deposition (PVD), cover the screw surface with a wear-resistant metal film that refracts light brilliantly, instantly illuminating the wheels or engine compartment. These processes not only satisfy modification enthusiasts' pursuit of aesthetics but also further isolate the screws from external corrosion through a sealed coating design, extending their lifespan. From the aerospace field to the modification workshop, Ningbo Yijun TC4 titanium alloy screws redefine the value dimension of modification accessories with their breakthroughs in "millimeter-level precision" and "artistic surface." They are not only "invisible guardians" connecting components but also "mechanical badges" reflecting the owner's individual attitude. Behind the speed and passion, this extreme pursuit of detail may be a microcosm of China's high-end manufacturing stepping onto the global stage.

For car and motorcycle owners who pursue ultimate racing performance, the essence of modification lies not only in a flamboyant appearance, but also in the precise upgrade of every detail—every breakthrough in lightweighting, every slight increase in strength, can be the key to victory on the track. Recently, Ningbo Yijun Technology Co., Ltd., with a keen insight into the needs of the high-end modification market, has officially launched the new TC4 titanium alloy lightweight modification nut, tailor-made for racing enthusiasts. With aerospace-grade materials, precision craftsmanship, and ultimate performance, it redefines the quality ceiling of modification fasteners, unlocking new possibilities for racing upgrades for owners who love speed and handling. In the world of racing car modification, the rule of "one kilogram less unsprung weight, ten kilograms more sprung weight" has long been a consensus among enthusiasts. The core of lightweight upgrades is to reduce weight without sacrificing safety and strength. Wheel nuts, as a crucial component connecting the wheel and the chassis, directly determine the vehicle's handling stability and driving safety, making them a critical detail that cannot be ignored in racing scenarios. Ningbo Yijun Technology, deeply rooted in precision manufacturing, leverages its cutting-edge technology and stringent quality control to overcome the limitations of traditional materials, selecting aerospace-grade TC4 titanium alloy as its core raw material to create this specialized modification nut suitable for both cars and motorcycles. It meets the demands for lightweighting while simultaneously strengthening safety. Superior quality stems from an extreme pursuit of detail, and Ningbo Yijun Technology's core competitiveness lies in this commitment to precision manufacturing. As a technology-driven company, Yijun Technology has introduced high-precision screening machines and a new generation of fully automatic thread rolling machines, equipped with advanced infrared detection technology and a self-developed PLC control system, achieving intelligent management of the entire process from raw material processing to finished product inspection. During the nut manufacturing process, micron-level precision control ensures that key parameters such as thread depth and inner hole roundness are within 0.02 millimeters in deviation, a five-fold improvement in precision compared to traditional processes. The surface undergoes a special anodizing treatment, forming a wear-resistant and corrosion-resistant protective coating that effectively resists rainwater and salt erosion, extending its service life. It also presents a simple yet sophisticated metallic texture, balancing practicality and visual appeal, and is compatible with various aftermarket wheel styles. Furthermore, this TC4 titanium alloy lightweight aftermarket nut has undergone multiple rounds of rigorous testing, including tensile strength testing, fatigue vibration testing, salt spray corrosion resistance testing, and simulated road testing. The defect rate has been reduced to below 0.05%, fully meeting the tolerance standards of the high-end European market, showcasing the precision strength of "Made in China." Simultaneously, the product features a customized design, precisely matching the wheel mounting hole positions and thread specifications of different vehicle models. Whether it's a performance sports car, off-road vehicle, heavy motorcycle, or racing motorcycle, it achieves perfect compatibility without additional modifications. Installation is convenient and efficient, allowing every racing motorcycle owner to easily complete the upgrade. As a rising star in the industry, Ningbo Yijun Technology has always adhered to the mission of "reshaping high-end fastener standards through technological innovation" since its inception. It invests 15% of its annual revenue in R&D, deeply cultivating fields such as new energy vehicles, aerospace, and high-end modification, and has won global customer recognition with its superior product quality. The launch of the new TC4 titanium alloy lightweight modified car nut not only demonstrates Yijun Technology's technological strength but also deeply responds to the needs of racing car owners. It breaks through the traditional dilemma of "heavy strength, light weight" or "heavy weight, weak strength" in nuts, achieving a perfect balance between lightweight and high strength. This allows every car owner pursuing racing performance to unlock a dual breakthrough in speed and safety through detailed upgrades.

In the field of car and motorcycle modification, the pursuit of ultimate performance is never limited to core components such as engine upgrades and chassis tuning. Optimizing every detail can be key to breaking through performance bottlenecks. Recently, Ningbo Yijun Technology Co., Ltd., accurately understanding the core needs of modification enthusiasts, has launched its new generation of TC4 titanium alloy modified car bolts. Based on aerospace-grade materials, these bolts boast three core advantages: lightweight, high strength, and corrosion resistance, bringing a performance revolution in the details for users seeking ultimate handling and durability. For modification enthusiasts, the concept of "better to lose one kilogram than gain ten horsepower" is deeply ingrained, and the core of this concept is the ultimate control of unsprung mass. Unsprung mass refers to the weight of components not supported by the suspension springs, including tires, wheels, brake discs, and connecting bolts. Its weight directly affects a vehicle's handling response, grip, and acceleration performance—lighter unsprung mass results in more responsive wheels, higher steering precision, and reduced power loss, ensuring that every bit of power output translates into actual performance improvement. This is the core reason why high-performance cars and modified cars prioritize lightweight wheels. Ningbo Yijun Technology's new TC4 titanium alloy wheel bolts precisely address this core need, achieving ultimate lightweighting. Weighing only 57% of traditional steel bolts, they significantly reduce unsprung mass, resulting in immediate performance improvements. Compared to steel bolts, a single TC4 titanium alloy bolt of the same specifications can achieve significant weight reduction. Replacing all bolts on the same vehicle is equivalent to removing an extra "burden," making wheel rotation lighter, steering response quicker during emergency cornering, wheel rebound faster on uneven surfaces, and grip more stable. Whether carving through mountain roads or racing on the track, users can experience the thrill of "point-and-shoot" control, fully unleashing the vehicle's potential performance. As a product designed specifically for car and motorcycle users seeking ultimate performance, Ningbo Yijun Technology's new TC4 titanium alloy modification bolts are not just simple fasteners, but a profound interpretation of modification culture. Focusing on detail optimization, they integrate aerospace-grade technology into the civilian modification field, breaking the perception that "lightweight and high strength are mutually exclusive." Balancing performance, safety, and durability, they allow every modification enthusiast to achieve an upgrade in vehicle performance through detailed upgrades. Details determine success or failure; performance stems from professionalism. Ningbo Yijun Technology, leveraging its deep understanding of the aftermarket and its accumulated technical expertise, has created the TC4 titanium alloy car bolts, a product that combines strength and quality. These bolts not only satisfy high-end aftermarket enthusiasts' pursuit of ultimate performance but also inject new vitality into the refined upgrading of the aftermarket industry. In the future, this product is expected to become a "star accessory" in the aftermarket, accompanying more users as they conquer racetracks and roads, experiencing performance leaps brought about by attention to detail in every acceleration and turn.

In precision manufacturing and assembly processes, thread damage (such as stripping, chipping, and seizing) is a thorny issue that directly affects product reliability and production efficiency. As a professional team deeply involved in the field of precision molds and fasteners, Ningbo Yijun Technology Co., Ltd., based on years of practical experience, provides you with an in-depth analysis of the common causes of thread damage and their solutions. I. Mechanical Stress Factors: Exceeding Load Limits Overload Tightening: Torque Loss: Torque exceeding the design load limit can lead to permanent deformation or fracture of the thread profile. Axial Force Concentration: Tilting or eccentricity during assembly can cause excessive stress at specific locations (such as the end), leading to localized stripping. Thread Fit Precision: Excessive Tolerance Fit: Insufficient clearance between the nut and bolt increases friction, easily leading to surface wear or even "welding." Thread angle deviation: A deviation from the standard 60° angle reduces the contact area, creating micro-stress concentration points. Material strength defects: Materials with low hardness or high brittleness (such as untreated low-carbon steel or inferior cast iron) are prone to failure under repeated stress. Excessively thick surface treatments (such as electroplating) can damage original fit tolerances. II. Assembly process issues: Details determine success or failure Operational standardization: Incorrect sequence: Failure to tighten in a diagonal sequence leads to uneven stress, causing premature overload of local threads. Reuse: Forcing the use of fasteners that are already worn or show signs of stripping can cause chain-like damage. Tool selection and wear: Worn wrenches or sockets can cause the point of force application to shift, generating unnecessary lateral shear forces. Impact load: The instantaneous high pressure generated by impact wrenches is often a "killer" of precision threads. Lack of lubrication management: Dry friction significantly increases heat, especially with stainless steel materials; lack of lubrication easily leads to self-locking seizing. III. Design and Environmental Defects: Identifying Risks at the Source Improper Structural Design: Thread Engagement Length: If the thread engagement length is less than 1.5 times the diameter, the load-bearing capacity will be significantly reduced. Undercut Design: The lack of stress-relieving structures (such as chamfers or undercuts) will lead to stress concentration at the starting point. Insufficient Environmental Adaptability: In high-temperature or highly corrosive environments, if weather-resistant materials (such as high-grade stainless steel) are not selected, the threads will fail due to creep or electrochemical corrosion. IV. Potential Challenges from Customer Usage Scenarios Frequency Disassembly and Assembly: Frequent operation causes metal fatigue, leading to thread embrittlement. Impurity Intrusion: Tiny sand particles or metal shavings enter the thread gap and act as "abrasives" during tightening, severely scratching the thread surface. Vibration Fatigue: Continuous vibration will cause the thread to fail due to fatigue in the "loosening-retightening" cycle. Yijun Technology's editor suggests: A systematic solution Precise torque control: It is recommended to strictly use a calibrated torque wrench during assembly, avoiding blindly applying force, and adhering to ISO 9001 standards. Enhanced testing methods: Regularly use professional thread gauges to precisely test the thread pitch and thread angle to ensure compatibility with various high-precision specifications from M0.6 to M5. Upgraded material performance: Prioritize the use of high-strength materials of grade 8.8 and above, or adopt high-hardness alloy materials customized and developed by Ningbo Yijun Technology to improve durability. Optimized assembly process: Applying high-performance lubricants such as molybdenum disulfide (MoS2) before tightening effectively reduces frictional heat and avoids the risk of seizing. Improved structural design: Ensure the thread engagement length is greater than 1.5D during the design phase and add necessary stress relief structures (such as relief grooves) to optimize the design of molds and parts from the source. Case review: Why does damage always occur in the "last few turns"? If damage is concentrated at the last moment, it usually points to: stress concentration at the end due to insufficient effective thread length, or lateral stress caused by tool angle misalignment. Ningbo Yijun Technology reminds you: When facing complex thread damage, precise location is better than blind replacement. We welcome photos or samples of the damaged parts, and our technical team will provide you with targeted failure analysis based on tooth wear characteristics (extrusion, tearing, fatigue). Want more customized solutions for miniature precision threads (M0.6-M5)? Contact us to help you reduce costs and increase efficiency in your production!

On January 28, 2026, Ningbo Yijun Technology Co., Ltd. (hereinafter referred to as "Yijun Technology")'s independently developed 3T thread rolling machine was mass-producing precision screws of M2 to M12 specifications at a production efficiency of 600 pieces per minute. This equipment, integrating intelligence, high precision, and high adaptability, has successfully entered the high-end markets of Europe and North America with its breakthrough technical indicators and full-process digital control capabilities, becoming a new benchmark for "Made in China" fasteners globally. The core advantage of Yijun Technology's 3T thread rolling machine lies in its micron-level processing precision and multi-material adaptability. Equipped with a self-developed PLC control system and infrared spectral analysis module, the equipment can adjust rolling parameters in real time, improving the roundness detection accuracy of nut inner holes from the industry average of 0.1 mm to 0.03 mm, and even achieving tolerance control of ±0.002 mm in the processing of M1.6 ultra-small screws. This data has reached the same level as leading German and Japanese brands, completely breaking the long-standing monopoly of foreign capital in the high-end market. "Traditional thread rolling machines are prone to cracking or dimensional deviations when processing high-hardness materials such as stainless steel and titanium alloys. Our equipment, through dynamic pressure compensation algorithms and TD coating mold technology, reduces the defect rate from 3% to 0.05%," said the technical director of Yijun Technology. According to actual test data, when processing M12 high-strength bolts, the thread depth deviation is only 0.02 mm, a 5-fold improvement in accuracy compared to traditional processes. Since mass production began in early 2026, the 3T thread rolling machine has secured bulk orders from Italy, Germany, France, and other countries. Among them, the M1.6 screw production line customized for a high-end precision instrument manufacturer in Italy has become a "no-inspection link" in the customer's supply chain thanks to its end-to-end digital traceability system and real-time infrared detection reports. "The infrared spectrum and dimensional data of each screw are recorded in detail, which provides us with crucial information for optimizing the assembly process," commented an Italian customer representative during a factory visit. "This level of transparency is extremely rare in European and American supply chains. Yijun Technology has redefined the credibility of 'Made in China'." According to statistics, in January 2026, Yijun Technology's fastener orders exported to Europe increased by 200% year-on-year, with screws for new energy vehicle battery pack assembly accounting for over 60%. A German Tier 1 supplier has even listed Yijun Technology as a "core strategic partner," stating that its equipment "achieves equivalent quality at one-third the cost." As a rising star company founded in October 2025, Yijun Technology's rise stems from its relentless pursuit of technological innovation. The company invests 15% of its annual revenue in R&D and currently holds three patents related to infrared detection. It plans to launch a defect prediction model that fuses AI visual recognition with infrared spectroscopy in the second half of 2026, further improving detection efficiency by 30%. "Our goal is not to become the largest screw manufacturer, but to become an irreplaceable technological solution provider in the field of micro-precision manufacturing," revealed founder Hou Hui. The company is currently collaborating with local universities in Ningbo to develop a thread rolling process for superhard materials, and plans to expand into high-end fields such as aerospace and medical equipment in the future. Yijun Technology's case reflects the profound transformation of Ningbo's manufacturing industry. As an important fastener production base in China, Ningbo has over 2,000 related enterprises, but the high-end market has long been monopolized by German and Japanese companies. Emerging companies like Yijun Technology are reshaping the global supply chain landscape through intelligent equipment, digital management, and global services.

On January 27, 2026, at the intelligent and modern factory of Ningbo Yijun Technology Co., Ltd. (hereinafter referred to as "Ningbo Yijun Technology"), a batch of M1.6 small screws, embodying the crystallization of precision manufacturing technology, completed production quality inspection and were officially packed and shipped to the Italian customer. This batch of screws, with a tolerance control capability of ±0.002 mm, once again demonstrates the hard power of China's high-end manufacturing to the global market. The M1.6 small screws delivered this time have a diameter of only 1.6 mm, and their thread precision, material strength, and surface treatment difficulty far exceed those of conventional products. Ningbo Yijun Technology adopts a fully digital production line, integrating CNC turning centers and optical inspection equipment, realizing unmanned operation from blank processing to finished product inspection. The optical inspection equipment scans the screw surface with micron-level precision, accurately identifying dimensional deviations as small as 0.01 millimeters, ensuring that every screw meets the stringent tolerance standards of Italian customers. “These screws will be used in core components of high-end precision instruments in Italy, where even the slightest error can affect equipment stability,” said the Quality Director of Ningbo Yijun Technology. “Through infrared detection technology, we have reduced the defective product miss rate from the industry average of 3% to 0.05%, while increasing inspection efficiency by 5 times, fully meeting the delivery cycle requirements of the European market.” Founded in October 2025, Ningbo Yijun Technology, though a newcomer to the industry, has rapidly risen through technological innovation. Initially, the company accumulated experience by importing German infrared inspection equipment, and by early 2026, it had achieved independent development of its core algorithms. Its screening machine's PLC control system can automatically adjust detection parameters according to different product characteristics; for example, it has improved the roundness detection accuracy of nut inner holes from 0.1 millimeters to 0.03 millimeters, reaching the same level as leading international brands. “We invest 15% of our revenue in R&D annually and currently hold three patents related to infrared detection,” revealed Hou Hui, the company's founder. “Our next plan is to integrate AI visual recognition with infrared spectral analysis to build a more intelligent defect prediction model, further solidifying our technological barriers.” This Italian order includes 500,000 screws and nuts in 12 different specifications, intended for use in the assembly of battery packs for new energy vehicles in Europe. The client emphasized that the testing reports provided by Ningbo Yijun Technology meticulously recorded the infrared spectrum and dimensional data of each product, providing crucial information for optimizing subsequent assembly processes. “This level of transparency is extremely rare in European and American supply chains,” commented an Italian client representative after visiting the testing process. As a major fastener production base in China, Ningbo boasts over 2,000 related companies, but the high-end market has long been monopolized by German and Japanese companies. The case of Ningbo Yijun Technology reflects the transformation trend of Ningbo's manufacturing industry—reshaping the supply chain through technological innovation and becoming a key force in becoming a global intelligent manufacturing innovation hub. Currently, Ningbo Yijun Technology's main products cover miniature screws ranging from M0.5 to M3. With their high precision, high strength, and corrosion resistance, these screws are widely used in precision assembly of spacecraft, minimally invasive instruments in medical equipment, and core components of high-end electronic products. The company has passed ISO9001 international quality management system certification and has established a standardized system covering the entire process from raw material procurement to finished product delivery. "Our goal is not to become the largest screw manufacturer, but to become an irreplaceable technological solution in the field of micro-precision manufacturing," said Hou Hui. "In the future, we will continue to deepen our digital and intelligent transformation, helping China's high-end manufacturing reach a higher level." At this moment, on Ningbo Yijun Technology's testing line, another batch of screws and nuts, soon to be shipped to Germany, is passing through the infrared scanning area. With each flash of the beam, the precision genes of "Made in China" are crossing oceans, etching a new coordinate in the global industrial chain.

On January 22, 2026, at the modern factory of Ningbo Yijun Technology Co., Ltd., located at No. 299 Lishi Road, Ditang Street, Yuyao City, a batch of newly produced screws and nuts was undergoing rigorous quality inspection. This order came from a European client, and thanks to the infrared detection technology of its high-precision screening machine, Ningbo Yijun Technology successfully intercepted defective products, winning high-end recognition and praise from the client for its superior quality. The core of this inspection was infrared detection technology. The high-precision screening machine introduced by Ningbo Yijun Technology is equipped with advanced infrared sensors, capable of scanning the surface of screws and nuts with micron-level precision. During the inspection process, the equipment quickly identifies material defects, dimensional deviations, and surface scratches through infrared spectral analysis. For example, the thread depth deviation of a batch of screws was only 0.02 millimeters, which is difficult to detect with traditional manual inspection. However, the infrared system can complete data acquisition and mark it as defective within 0.1 seconds, ensuring that every product meets the stringent tolerance standards of European customers. “The advantage of infrared inspection lies in non-contact scanning and real-time data analysis,” said the Quality Director of Ningbo Yijun Technology. “Compared to traditional visual inspection, this technology reduces the defective product omission rate from 3% to 0.05%, while increasing inspection efficiency by 5 times, fully meeting the delivery cycle requirements of the European market.” After visiting the inspection process, European customer representatives highly praised it: “Ningbo Yijun Technology’s inspection system demonstrates the precision level of Chinese manufacturing. Infrared technology not only ensures zero defects in products, but also allows us to monitor production progress in real time through a digital traceability system. This transparency is extremely rare in European and American supply chains.” It is understood that this order includes 500,000 screws and nuts of 12 specifications, used in the assembly of battery packs for new energy vehicles in Europe. The client emphasized that the inspection reports provided by Ningbo Yijun Technology meticulously recorded the infrared spectrum and dimensional data of each product, providing crucial information for optimizing subsequent assembly processes. Founded in October 2025, Ningbo Yijun Technology, though a newcomer to the industry, has rapidly risen to prominence thanks to its technological prowess. Initially accumulating experience through imported German infrared inspection equipment, the company achieved independent development of its core algorithms by early 2026. Its screening machines, equipped with a PLC control system, can automatically adjust inspection parameters based on different product characteristics, for example, improving the roundness detection accuracy of nut inner holes from 0.1 mm to 0.03 mm, reaching the same level as leading international brands. "We invest 15% of our annual revenue in R&D and currently hold three patents related to infrared inspection," revealed Hou Hui, the company's founder. "Our next plan is to integrate AI visual recognition with infrared spectral analysis to build a more intelligent defect prediction model." The case of Ningbo Yijun Technology reflects the transformation trend of Ningbo's manufacturing industry. As an important fastener production base in China, Ningbo has over 2,000 related enterprises, but the high-end market has long been monopolized by German and Japanese companies. Ningbo Yijun Technology has entered the new energy vehicle and aerospace industries through high-precision technologies such as infrared detection. In 2026, it partnered with three European Tier 1 suppliers, achieving a 200% year-on-year increase in exports. "Ningbo manufacturing is shifting from 'price competition' to 'value competition'," noted a relevant official from the Ningbo Municipal Bureau of Economy and Information Technology. "Companies like Yijun Technology, which are reshaping the supply chain through technological innovation, will become a key force in Ningbo's efforts to build a global intelligent manufacturing innovation hub." At this moment, on Ningbo Yijun Technology's inspection line, another batch of screws and nuts, destined for Germany, is passing through the infrared scanning area. With each flash of the beam, the precision genes of Chinese intelligent manufacturing are crossing oceans, etching a new coordinate in the global industrial chain.

Cold heading is a core technology in fastener manufacturing, widely used in the mass production of bolts, nuts, rivets, etc., due to its high efficiency, material saving, and excellent product performance. Ningbo Yijun Technology Co., Ltd. will systematically analyze how to improve the manufacturing precision and quality of fasteners from six aspects: process characteristics, factors affecting precision, equipment selection, raw material requirements, lubricant selection, and mold technology support. Combined with technical practice, the company will provide practical solutions for the industry. I. Core Characteristics of Cold Heading Process Cold heading is a forging method that uses molds to upset metal bars at room temperature. Its core advantages include: ① Precision forming: Based on the theory of metal plastic deformation, a predetermined shape and size are achieved through pressure. Surface precision can reach IT7-IT8 level, and dimensional tolerances are controlled within ±0.05mm. ② High Efficiency and Automation: Multi-station cold heading machines can continuously complete processes such as cutting, forming, chamfering, and thread rolling, achieving a production efficiency of 60-600 pieces per minute and an equipment utilization rate exceeding 90%. ③ Performance Improvement: The work-hardening effect increases the tensile strength of the workpiece by 15%-30%, improves the continuity of metal fibers compared to machining, and significantly extends fatigue life. ④ Economic Benefits: Material utilization is as high as 85%-95%, reducing metal loss by 60%-70% compared to traditional machining, and lowering the cost per piece by more than 40%. II. Six Core Factors Affecting Cold Heading Accuracy Achieving high-precision cold heading requires strict control of the following variables: ① Chemical Composition: Pure metals have better plasticity than alloys, while impurities (such as sulfur and phosphorus) easily lead to brittleness. For example, for every 0.1% increase in carbon content in steel, the ultimate tensile strength increases by 6-8 kg/mm², but plasticity decreases by 5%-10%. ② Metallographic Structure: Grain size, segregation, and inclusions (bubbles, porosity) directly affect plasticity. Spheroidizing annealing can transform the microstructure into spherical pearlite, significantly improving cold deformation capability. ③ Deformation Temperature: At room temperature, plasticity fluctuates non-linearly with temperature. A mold temperature control system is needed to stabilize the workpiece temperature between 20-50℃. ④ Strain Rate: Excessive strain rate can easily cause adiabatic heating, leading to localized softening; excessively slow rate increases frictional losses. Typical strain rates are controlled between 0.1-10 s⁻¹. ⑤ Mechanical Conditions: Triaxial compressive stress is conducive to plasticity. Mold design needs to optimize stress distribution, for example, by using a combined parting structure to reduce lateral stress. ⑥ Deformation Continuity: Intermittent deformation can improve the forming performance of low-plasticity metals, such as reducing the amount of deformation per pass through multi-station step-by-step upsetting. III. Selection Criteria for High-Performance Cold Heading Machines High-quality equipment is the foundation for ensuring precision and must possess the following characteristics: ① Structural Strength: The machine body is made of alloy ductile iron casting with a tensile strength ≥450MPa; high wear-resistant alloy copper bearings are used at the crankshaft connection, extending service life by more than 3 times. ② Power System: Two-stage gear transmission combined with pneumatic clutch and brake increases transmission efficiency to 92% and reduces energy consumption by 15%. ③ Operational Stability: The guide plate drives the cutter rod to ensure linear transmission of cutting force, with dynamic balance accuracy ≤0.1mm; equipped with fault detection and safety protection devices, it can automatically stop the machine to protect the mold. ④ Feeding Accuracy: The feeding box has a thrust device and supports variable frequency stepless speed regulation, with a feeding error ≤0.02mm. ⑤ Intelligent Monitoring: Integrated sensor and PLC control system monitors parameters such as pressure and temperature in real time, achieving closed-loop process control. Typical Case: Ningbo Yijun Technology introduced the TXS308 multi-station high-speed automatic cold heading machine. Through its horizontally arranged forging stations, it increased screw production efficiency to 800 pieces/minute, with a product qualification rate consistently above 99.2%. IV. Strict Selection Standards for Cold Heading Raw Materials Material quality directly determines the upper limit of finished product performance: ① Condition Treatment: Spheroidizing annealing is required. The microstructure should be spheroidal pearlite, with a hardness of 75-85 HRB. The surface should exhibit a "hard surface, soft core" characteristic, with a core hardness ≤60 HRB to optimize cutting quality. ② Hardness and Plasticity: The hardness of cold-drawn material should be ≤85 HRB, and the elongation ≥25% to reduce the risk of cracking and protect the mold. ③ Surface Requirements: The lubricating film should be uniformly dark in color, free of scratches, cracks, rust, or oxide scale; surface roughness Ra ≤0.8μm. ④ Decarburization Control: The total thickness of the radial decarburized layer must not exceed 1% of the diameter; otherwise, surface cracks are easily triggered. ⑤ Hardening Sensitivity: Raw materials are evaluated through cold heading tests; lower sensitivity facilitates forming. For example, 35CrMoA steel requires pretreatment to a hardness ≤80HRB before cold heading. V. Key Roles of Cold Heading Oil Lubrication is not only about reducing friction but also a crucial guarantee for the forming process: ① Extreme Pressure Lubrication: Cold heading oils containing sulfurized lard and sulfurized fatty acid esters can form a chemical reaction film under high pressure, preventing mold sintering, especially suitable for difficult-to-machine materials such as stainless steel. ② Heat Dissipation and Environmental Protection: Thermal conductivity ≥0.15W/(m·K), avoiding localized overheating; low smoke and low odor design improves the operating environment and complies with RoHS standards. ③ Protective Performance: Reduces sludge formation, provides inter-process rust prevention, and extends mold life by more than 50%. ④ Wide Applicability: Meets the processing needs of products with large deformation, such as hollow rivets and high-strength bolts, with deformation reaching over 60%. Application Example: After adopting specialized cold heading oil, Ningbo Yijun Technology extended its mold replacement cycle from once per shift to once every three days, reducing lubrication costs per part by 0.02 yuan. VI. Core Support of Mold Technology As a leading mold supplier in the industry, Ningbo Yijun Technology's technological practices provide key support for improving cold heading precision: ① Mold Design: Employs integrated CAD/CAE/CAM design to simulate metal flow paths, optimize mold cavity structure, and reduce flash generation. ② Material Selection: The mold working surface uses DC53 mold steel with a hardness of 58-62 HRC, offering twice the wear resistance of Cr12MoV. ③ Surface Treatment: Through TD coating or PVD plating technology, the mold surface hardness reaches 1200-1500 HV, improving anti-adhesion by three times. ④ Precision Control: The mold manufacturing precision reaches ±0.005mm, and with the help of an online detection system, dynamic adjustment of product dimensions is achieved. Improving fastener precision is a systematic project involving multiple aspects such as equipment debugging, material selection, lubrication environment optimization, and mold technology support. Chongqing Heng Hui Precision Mold Co., Ltd. has successfully controlled its product defect rate to below 0.8% by introducing advanced equipment, optimizing process parameters, and strictly controlling quality, setting a benchmark for the industry. Strict adherence to process specifications not only ensures product quality but also reduces costs and increases efficiency, driving the upgrading of China's fastener manufacturing industry towards high-end and intelligent directions.

In the vast expanse of precision manufacturing, Ningbo Yijun Technology Co., Ltd. shines like a rising star, distinguishing itself in the field of micro-screw production with its exceptional micron-level manufacturing capabilities. Ningbo Yijun Technology's core advantage is significant, with its micron-level manufacturing capabilities being truly exceptional. In the highly demanding field of micro-screw production, the company has achieved mass production of a full range of micro-screws from M0.5 to M3. This requires not only advanced production equipment but also sophisticated process technology and a rigorous quality control system. The dimensional accuracy of each screw is controlled at the micron level, ensuring high product quality and stability. A wide selection of materials is another highlight of Yijun Technology. Its micro-screws utilize more than 12 materials, including titanium alloys, stainless steel, copper, aluminum, and carbon steel. Different materials possess different properties, meeting the diverse screw needs of various industries such as aerospace, medical devices, precision electronics, and micromechanical systems. For example, the aerospace industry demands extremely high strength and high-temperature resistance in materials, making titanium alloy screws the ideal choice; while medical devices prioritize biocompatibility, which stainless steel screws perfectly meet. Ningbo Yijun Technology is committed to providing precision screw solutions for various industries. With its sophisticated technology and high-quality products, it has earned the trust and praise of numerous customers. In the aerospace field, its screws provide reliable assurance for the safe flight of aircraft; in the medical device industry, they facilitate the precise operation of medical equipment; and in the fields of precision electronics and micromechanics, they drive the miniaturization and precision of products. In the future, Ningbo Yijun Technology Co., Ltd. will continue to delve into the field of micron-level manufacturing, continuously improving its technological level and innovation capabilities, providing even higher-quality precision screw products to more industries, and writing its own brilliant chapter.

In the field of precision manufacturing, every micrometer of precision is crucial to product performance and the future development of the industry. Ningbo Yijun Technology Co., Ltd., a pioneer in the field of micro-precision screws, has become a benchmark enterprise in the industry thanks to its outstanding technical strength and innovative spirit. The company focuses on the design, development, and manufacturing of micro-precision screws, with millimeter-level precision control as its core competitiveness, providing key component support for high-end fields such as aerospace, medical, and precision electronics. Ningbo Yijun Technology has built a standardized production system certified by ISO9001 international quality management system. From raw material procurement to finished product delivery, every step strictly adheres to international standards to ensure the stability and reliability of product quality. The company has introduced a fully automated digital production line integrating CNC turning centers and optical inspection equipment, realizing intelligent control of the entire process from processing to inspection. This technological innovation not only significantly improves production efficiency but also strictly controls the tolerance range within ±0.002mm, achieving an industry-leading millimeter-level precision level. Currently, Ningbo Yijun Technology's main products cover miniature screws ranging from M0.5 to M3. Leveraging their high precision, high strength, and corrosion resistance, these screws are widely used in precision assembly of spacecraft, minimally invasive instruments in medical equipment, and core components of high-end electronic products. The company is always customer-oriented, continuously pushing the precision limits of miniature screw manufacturing through technological iteration and process optimization, providing customized solutions for global customers. In the future, Ningbo Yijun Technology will continue to be driven by technological innovation, deepen its digital and intelligent transformation, and cultivate its expertise in the field of miniature precision screws, contributing to a higher level of high-end manufacturing in China.

From October 7 to 10, 2025, Shanghai Jinggong Technology Co., Ltd. will make its debut at the Crocus Expo in Moscow, participating in Fastenex—Russia’s leading international exhibition for fasteners and industrial supplies. We will showcase a range of precision stamping molds and high-end fastener solutions at Booth A3047, Hall 1, Pavilion 4, and welcome global clients to visit us. Exhibition Details: Event: Fastenex Russia International Fastener & Industrial Supply Exhibition Date: October 7-10, 2025 Location: Crocus Expo, Hall 1, Pavilion 4, Moscow Our Booth: A3047 Exclusive Offer Code: ftn25eSONP (Use this code to access exclusive exhibition discounts) Focus Areas: This year’s Fastenex highlights four core sectors:? Industrial fasteners and equipment? Construction fasteners and solutions? Furniture-specific fasteners and hardware? Fastening technology for electrical and wire installations Shanghai Jinggong Technology will feature:✅ High-precision multi-station cold heading molds✅ Stamping solutions for new energy vehicle fasteners✅ Aerospace-grade high-strength fastener molds✅ Customized intelligent mold design services Why Choose Shanghai Jinggong Technology? 15 years of experience in precision mold R&D and manufacturing CE certification and ISO 9001 compliant quality systems Products exported to over 30 countries and regions One-stop custom design and technical collaboration support We look forward to meeting you in Moscow to explore opportunities in the Russian and Eastern European markets!? Schedule a meeting in advance: Contact us via our official website with the note “Fastenex2025” for exclusive consultation channels. Seize the opportunity for cooperation at Booth A3047!*Use offer code ftn25eSONP for special on-site order benefits.*

What Equipment is Used in CNC Machining? CNC machining encompasses a wide variety of equipment. The common types include the following: Metal Cutting CNC Lathe Features: Primarily used for machining rotary parts, such as shafts and discs. It can perform operations like turning outer circles, inner holes, end faces, and threading. Applications: Widely used in machinery manufacturing, automotive, motorcycle, and instrumentation industries for processing various shaft and sleeve parts. CNC Milling Machine Features: Capable of performing surface milling, contour milling, and cavity milling. Through tool rotation and worktable movement, it enables multi-axis machining, handling complex planar and three-dimensional shapes. Applications: Used in machining, mold manufacturing, and electronic equipment manufacturing industries. Commonly employed for processing planes, grooves, gears, cams, and other parts. CNC Machining Center Features: Built on the basis of CNC milling machines, it includes an automatic tool changer and a tool magazine. It enables automatic tool switching for multiple operations like milling, drilling, boring, reaming, and tapping in a single setup. Applications: Widely used in automotive, aerospace, mold, and electronics industries for processing complex-shaped parts, significantly improving efficiency and precision. CNC Drilling Machine Features: Primarily used for drilling, reaming, countersinking, and other hole-making operations. It offers high precision and efficiency, with CNC systems ensuring accurate control over hole position and depth. Applications: Used in machinery manufacturing, construction hardware, and automotive parts processing industries. Commonly applied for machining hole-based parts, such as oil holes and threaded holes in engine blocks. CNC Boring Machine Features: Mainly used for high-precision holes and hole systems, ensuring dimensional, shape, and positional accuracy. Suitable for large-diameter and deep-hole machining. Applications: Commonly used in large-scale machinery manufacturing, shipbuilding, and aerospace industries for processing box-type parts and machine tool spindle housings. Electrical Discharge Machining CNC EDM (Electrical Discharge Machining) Forming Machine Features: Uses spark discharge energy to erode conductive materials, enabling the machining of complex cavities and molds, especially shapes difficult to achieve with traditional cutting methods. Applications: Primarily used in mold manufacturing, such as plastic molds, die-casting molds, and stamping dies. Also suitable for machining parts made of special materials. CNC Wire-Cut EDM Machine Features: Uses a moving thin metal wire (electrode wire) as a tool electrode to cut workpieces through spark discharge. It can machine straight and curved shapes with high precision and excellent surface quality. Applications: Widely used in mold manufacturing, electronic component processing, and precision machining industries. Commonly employed for processing punches, dies, and fixed plates in stamping molds. Other Machining Types CNC Laser Cutting Machine Features: Uses high-energy-density laser beams to melt or vaporize materials instantly, enabling precise cutting. Advantages include high speed, high precision, clean cuts, and non-contact processing. Applications: Used in metal processing, automotive manufacturing, aerospace, and electronic equipment manufacturing industries. Suitable for cutting various metal sheets and pipes.   CNC Waterjet Cutting Machine Features: Uses high-pressure water jets mixed with abrasives to cut materials of any hardness, including metals, stone, glass, and ceramics. It produces no heat deformation or burrs and offers strong material adaptability. Applications: Used in architectural decoration, stone processing, automotive interior parts processing, and aerospace industries. Commonly applied for cutting complex-shaped sheets and parts.  

On September 4, 2025, the China (Chongqing)-Belarus China-Belarus Industrial Park "Belt and Road" Investment Opportunities Promotion Conference was held in Yuzhong District, Chongqing. As a flagship project of the China-Belarus joint Belt and Road Initiative, the China-Belarus Industrial Park presented over 100 cooperation opportunities across 13 categories to Chongqing, attracting over 200 companies from Chongqing and western China. Hou Hui, General Manager of Chongqing Henghui Precision Mold Co., Ltd. (hereinafter referred to as "Henghui Mold"), was invited to attend the conference as a representative of a benchmark enterprise in China-Belarus cooperation. Henghui Mold specializes in precision mold design and manufacturing, five-axis CNC machining equipment development, and aviation component processing services. With micron-level precision as its core competitiveness, the company's product offerings cover molds for core automotive engine components, molds for battery trays for new energy vehicles, and machining of titanium alloy aircraft components. The company serves renowned companies in many countries around the world. Technological Breakthrough: A "Chinese Solution" to Breaking International Monopolies. By 2025, Henghui Mold's independently developed "five-axis high-speed machining center" successfully overcomes the challenges of machining complex curved surfaces in titanium alloys. Using dynamic thermal error compensation technology, machining accuracy is improved to ±0.002 mm. This system will provide machining services for key landing gear components for passenger aircraft for the United Aircraft Corporation (UAC) of Russia, filling a technological gap in the Eastern European market. To meet the lightweighting needs of new energy vehicles, the company developed an "integrated die-casting mold intelligent design system," shortening mold development cycles by 40% and reducing costs by 25%. This system has helped companies such as Changan Automobile and Seres achieve "one-piece molding" for battery trays. The related technology won the first prize of the 2025 China Machinery Industry Science and Technology Award. In collaboration with the National Academy of Sciences of Belarus, Henghui Mold has developed "biocompatible polymer material precision injection molds" for the production of medical devices such as artificial joints and heart stents. The molds have received EU CE certification and are registered with the Belarusian Ministry of Health, making Henghui Mold a core Chinese supplier of this technology in Eastern Europe. To date, Henghui Mold's products are exported to over 100 countries, including Russia, Germany, and Belarus. Among them, the Russian market saw the fastest growth, with orders increasing by 200% year-on-year in the first half of 2025. Many companies are using Henghui's molds and processing services. At the promotional event, Hou Hui detailed Henghui Mold's "Eastern European Strategy": By June 2025, the company had established the "China-Russia Aviation Parts Processing Technology Center" in Moscow, equipped with 10 independently developed five-axis CNC machines. This center will provide Russian aviation companies with "localized processing + remote process support" services, addressing the problem of part deformation caused by transportation and reducing customer costs by 30%. "The China-Belarus Industrial Park's tax incentives (corporate income tax exemption for the first 10 years), mutual recognition of EU standards, and the logistics advantages of the China-Europe Express trains allow us to compete globally with the combined strength of 'Chongqing technology + Eastern European market.'" Hou Hui stated that the company plans to invest in the park within the next three years to build an intelligent equipment production base, integrating the precision processing capabilities of the Chongqing base with Belarus' aviation industry foundation.

Since its establishment in 2009, Chongqing Henghui Precision Mold Co., Ltd. (hereinafter referred to as Henghui Precision Molds) has specialized in the research, development, and production of micro-precision screws. Leveraging its exceptional micron-level manufacturing capabilities, Henghui Precision Molds has become a trusted partner for the aerospace, medical device, precision electronics, and micro-mechanics sectors. Adhering to the core philosophy of "Precision in Microscopy, Stability in Operation," the company is committed to pushing the boundaries of size and meeting the stringent requirements of high-end manufacturing for precision components. Henghui Precision's core competitiveness stems from its micron-level machining technology, enabling mass production of a full range of micro-screws with thread sizes ranging from M0.5 to M3, with outer diameters as small as ≤1mm and thicknesses as thin as 0.05mm (e.g., stainless steel screws with washers). The company supports customized production for over 12 materials, including titanium alloy, stainless steel, copper, aluminum, and carbon steel, addressing diverse needs, from high-strength and lightweight (titanium alloy) to corrosion-resistant and conductive (copper and stainless steel). For example, Henghui Precision utilizes precision cold heading and micron-level stamping technology to achieve integrated molding of the washer and screw, ensuring connection stability in high-vibration environments. This product is ISO 9001 certified and offers a salt spray test report (neutral salt spray test: no rust for ≥72 hours), meeting the corrosion resistance and long-term reliability requirements of medical implants, avionics, and other applications. Facing the high-end manufacturing trend of "smaller, more precise, and more stable," Henghui Precision continues to invest in R&D, exploring nano-scale surface treatment technologies, superplastic forming processes, and expanding the application of new materials such as high-temperature alloys and shape memory alloys, to provide global customers with even more advanced precision fastening solutions.

Cold heading and cold extrusion are essentially deformation processes under similar conditions, but they differ in their operational methods. Cold heading is a forging deformation process typically used for smaller workpieces and is commonly employed in the fastener industry. In contrast, cold extrusion involves the extrusion deformation of larger workpieces and has a broader range of applications.  What is Cold Extrusion? Cold extrusion is a processing method in which a metal blank is placed in a cold extrusion die cavity, and at room temperature, a fixed punch on a press applies pressure to the blank, causing plastic deformation of the metal to produce parts. Clearly, cold extrusion relies on dies to control metal flow and involves substantial transfer of metal volume to form parts. In terms of extrusion equipment, China has the capability to design and manufacture extrusion presses of various tonnage levels. In addition to using universal mechanical presses, hydraulic presses, and cold extrusion presses, friction screw presses and high-speed, high-energy equipment have also been successfully employed for cold extrusion production.  If the blank is extruded without heating, the process is called cold extrusion. Cold extrusion is one of the chip-less or minimal-chip machining processes, making it an advanced method in metal plastic processing. If the blank is heated to a temperature below the recrystallization temperature before extrusion, the process is called warm extrusion. Warm extrusion still retains the advantages of minimal or no chip production.  Cold extrusion technology is an advanced production process characterized by high precision, efficiency, quality, and low consumption. It is widely used in the large-scale production of small and medium-sized forged parts. Compared to hot forging and warm forging processes, it can save 30% to 50% in materials and 40% to 80% in energy, while also improving the quality of forged parts and enhancing the working environment.  Currently, cold extrusion technology has found extensive application in industries such as fasteners, machinery, instruments, electrical appliances, light industry, aerospace, shipbuilding, and military manufacturing. It has become an indispensable important processing method in metal plastic volume forming technology. With technological advancements and increasing technical requirements for products in industries such as automobiles, motorcycles, and household appliances, cold extrusion production technology has gradually become the development direction for the refined production of small and medium-sized forged parts.  Cold extrusion can also be classified into forward extrusion, backward extrusion, compound extrusion, and radial extrusion. What is Cold Heading?  Cold heading is one of the new chip-less or minimal-chip metal forming processes. It is a processing method that utilizes the plastic deformation of metal under external force, redistributing and transferring the metal volume with the aid of dies to form the desired parts or blanks. Cold heading is most suitable for producing standard fasteners such as bolts, screws, nuts, rivets, and pins. The equipment commonly used for cold heading is specialized cold heading machines. If the production volume is relatively low, crank presses or friction screw presses can be used as alternatives.   Due to its high productivity, excellent product quality, significant material savings, reduced production costs, and improved working conditions, cold heading is increasingly widely applied in mechanical manufacturing, particularly in the production of standard fasteners. Among these applications, the most representative products manufactured using multi-station cold heading machines are bolts, screws, and nuts. Are Cold Heading and Cold Extrusion the Same Thing?   Cold heading and cold extrusion are essentially deformation processes under similar conditions, but they differ in their operating methods. Cold heading is a forging deformation typically used for smaller workpieces and is commonly employed in the fastener industry. In contrast, cold extrusion involves the extrusion deformation of larger workpieces and has a broader range of applications. Cold heading can be considered a branch of cold extrusion.     To put it simply, in the bolt manufacturing process:   - The formation of the hex head is achieved through cold heading.   - The reduction of the shank diameter is accomplished by cold extrusion (forward extrusion).     For example, trimless hex flange bolts (formed through multi-station processes) involve both cold heading and cold extrusion. In the manufacturing of hex nuts, the initial shaping stage involves only cold heading, while the subsequent hole extrusion step utilizes cold extrusion (both forward and backward extrusion).  

Stamping dies are the primary process equipment for stamping processing, and stamped parts are produced through the relative movement of the upper and lower dies. During processing, the continuous opening and closing of the upper and lower dies poses a serious threat to the safety of operators if their fingers repeatedly enter or remain in the die closure area. (I) Main Components of Dies, Their Functions, and Safety Requirements 1. Working Components   The punch and die are the working components directly responsible for forming the blank. As such, they are critical parts of the die. The punch and die are not only precise but also complex, and they must meet the following requirements:   (1) Sufficient strength to avoid fracture or failure during the stamping process.   (2) Appropriate material selection and heat treatment to prevent excessive hardness and brittleness. 2. Positioning Components   Positioning components determine the installation position of the workpiece and include positioning pins (plates), stop pins (plates), guide pins, guide plates, pitch blades, side presses, etc. When designing positioning components, operational convenience should be considered. Over-positioning should be avoided, and positions should be easy to observe. It is preferable to use forward positioning, contour positioning, and guide pin positioning. 3. Blank Holding, Stripping, and Ejection Components   Blank holding components include blank holders and pressure plates.   Blank holders apply blank holding force to drawing blanks, preventing the blank from arching and wrinkling under tangential pressure. Pressure plates prevent the blank from shifting and bouncing. Ejectors and stripper plates facilitate part ejection and scrap removal. These components are supported by springs, rubber, or air cushion push rods on the equipment, allowing them to move up and down. Ejectors should be designed with sufficient ejection force, and their movement must be limited. Stripper plates should minimize the closure area or have hand clearance slots machined at operational positions. Exposed stripper plates should be surrounded by protective guards to prevent fingers or foreign objects from entering, and exposed edges should be chamfered. 4. Guiding Components   Guide pillars and guide bushes are the most widely used guiding components. Their function is to ensure precise (clearance fit) between the punch and die during stamping. Therefore, the clearance between guide pillars and guide bushes should be smaller than the stamping clearance. Guide pillars are installed on the lower die base and must extend at least 5 to 10 mm above the top surface of the upper die plate at the bottom dead center of the stroke. Guide pillars should be positioned away from the die blocks and pressure plates to ensure operators can feed and retrieve materials without reaching over the guide pillars. 5. Support and Clamping Components   These include upper and lower die plates, die shanks, punch and die holders, spacer plates, limiters, etc. The upper and lower die plates are the foundation components of the stamping die, with all other parts mounted and fixed on them. The planar dimensions of the die plates, particularly the front-to-back direction, should match the workpiece. Plates that are too large or too small may hinder operation.   Some dies (such as blanking and punching dies) require spacer plates under the die set to facilitate part ejection. In such cases, the spacer plates should ideally be bolted to the die plates, and the thickness of the two spacer plates must be absolutely equal. The spacing between the spacer plates should be just enough to allow part ejection and not too large, as this could cause the die plates to crack. 6. Fastening Components   These include screws, nuts, springs, dowel pins, washers, etc., which are generally standard parts. Stamping dies use a large number of standard parts. When selecting and designing these components, ensure they meet fastening and elastic ejection requirements. Avoid exposing fasteners on operational surfaces to prevent injuries and operational interference.

On August 20, 2025, Chongqing Henghui Precision Mold Co., Ltd. (hereinafter referred to as "Henghui Mold") officially completed packaging for its independently developed high-end CNC parts processing machine, which will soon be shipped to a Russian customer. This marks another milestone for Henghui Mold in the export of high-end equipment, following the initial collaboration between the two parties earlier this year, and signifies further international recognition of its "Made in China" technology. Chongqing Henghui Precision Mold Co., Ltd., established in 2009, specializes in the research, development, and manufacturing of precision molds and high-end equipment. Its products are widely used in the aerospace, automotive, and energy sectors. Driven by technological innovation, the company holds numerous independent intellectual property rights and has achieved international quality management system certification. With operations in numerous countries and regions worldwide, the company is committed to becoming a global leader in the precision manufacturing industry. The CNC equipment being exported is specifically designed to meet the high-precision requirements of Russian customers in aerospace parts processing. To address the characteristics of difficult-to-machine materials such as titanium alloys and high-temperature alloys, Henghui Mold's R&D team innovatively developed a dynamic compensation system. This system monitors stress changes in real time during machining and automatically adjusts cutting parameters, significantly improving the machining accuracy and surface quality of complex curved parts. "The aerospace industry places extremely high demands on component reliability; even the slightest error can impact overall performance," said Henghui Mold's technical director. The company collaborated closely with its Russian customer during the R&D phase. After multiple rounds of process verification and optimization, the system ultimately achieved a technological leap from "general-purpose" to "scenario-specific," capable of meeting the demands for long-term, stable operation under extreme working conditions. The collaboration between Henghui Mold and its Russian customer began with the equipment, but it goes beyond that. Building on the successful experience of previous project delivery, the company tailored a "technical symbiosis" service system for this collaboration: remote equipment monitoring and fault warnings via a cloud platform, 24-hour online support from a multilingual technical team, and customized process training and production line upgrade solutions. "International customers not only demand high-quality products, but also value long-term technical collaboration," said Hou Hui, General Manager of Henghui Mould. The company is accelerating the development of its global service network and plans to establish technical centers in Russia, Southeast Asia, and other regions in the future. This will shorten response times and help customers improve production efficiency and product competitiveness. In recent years, Henghui Mould has leveraged its expertise in precision manufacturing to gradually transform from a single mold product provider to a comprehensive solutions provider. The company not only provides customized molds and equipment for clients in industries such as automotive and energy, but also deepens its strategic ties with overseas clients through participation in international standard setting and joint R&D. It is reported that Henghui Mould has reached a follow-up cooperation agreement with a Russian client to jointly explore improving equipment adaptability in extreme cold environments and expand into new energy and high-end equipment. Hou Hui stated, "We hope to make 'Henghui Manufacturing' a trusted brand in the global precision industry through continuous technological innovation and service upgrades."

On August 28, 2025, Chongqing Henghui Precision Mold Co., Ltd. (hereinafter referred to as "Henghui Mold") announced that its independently developed custom-part development process and complete mold set have passed the rigorous inspection of a Brazilian customer. The first batch of products has been packed and shipped to South America. This order further recognizes Henghui Mold's technological strength in high-end custom parts and injects new momentum into China-Brazil precision manufacturing cooperation. The Brazilian order involves high-strength titanium alloy screw molds for the aerospace industry. The parts require tolerances within ±1μm and must withstand extreme temperature and vibration environments. Henghui Mold's technical team overcame three major technical challenges through a four-step closed-loop process: demand analysis - material matching - process optimization - and full-process quality control. To address the thermal deformation characteristics of titanium alloy, they employed a proprietary cryogenic cutting process, reducing processing temperatures by 30% and ensuring material stability. Leveraging a five-axis machining center and optical inspection equipment, they achieved a mold cavity surface roughness of Ra ≤ 0.05μm, a 40% improvement over the industry standard. Automated production lines and AI-powered quality control systems ensured a dimensional dispersion rate of less than 0.3% for each batch of 100,000 parts, meeting the stringent "zero defect" requirements of Brazilian customers. "The core of non-standard parts lies in customization, but customization doesn't necessarily sacrifice efficiency," said Mr. Li, Henghui Mold's Technical Director. "Using a modular design platform, we've reduced the mold development cycle from the traditional 60 days to 35 days, while maintaining a yield rate exceeding 98%." This Brazilian order is not Henghui Mold's first overseas expansion. On August 20, 2025, the company completed delivery of its independently developed high-end CNC parts processing machine to a Russian customer, marking a milestone in its high-end equipment exports. Just one week later, a Brazilian order was placed, further demonstrating Henghui Mould's global strategy of "technology-driven + localized service." The company's five-axis machining center achieves micron-level accuracy (±2μm), and its dynamic demonstration system garnered attention from representatives of companies from multiple countries at the 2025 Vietnam International Industrial Exhibition. A technical service center has been established in Brazil, staffed by a multilingual team of engineers, providing 24/7 on-site support to alleviate customer concerns. A long-term partnership has been established with a supplier to a Brazilian aviation industry company to ensure seamless integration of raw material supply and process standards. "The Brazilian market's demand for precision parts is growing at an annual rate of 15%, but local supply capacity is insufficient," said Hou Hui, General Manager of Henghui Mold. "Our advantage lies in providing a 'Chinese solution' that meets international standards while reducing customers' overall costs through localized services." Since its founding, Henghui Mold has focused on the micro screw market, building a comprehensive product portfolio covering sizes from M0.5 to M3, using over 12 materials, including titanium alloys, stainless steel, and carbon steel. These products are widely used in high-end industries such as aerospace, medical devices, and precision electronics. Its core competitiveness stems from three pillars: One patent and four international certifications ensure industry-leading five-axis machining technology; ISO 9001:2025 quality management system certification ensures full traceability from raw materials to finished product; and the company currently has strategic partnerships with over 50 high-end equipment companies worldwide, achieving a customer repurchase rate exceeding 85%. "There are no shortcuts in precision manufacturing; the only way is to persist in long-termism," said Hou Hui, general manager of Henghui Mould. "In the future, we will continue to use micron-level precision as the cornerstone to promote the upgrade of 'Smart Manufacturing in China' to 'Precision Manufacturing in China', and provide better solutions for global customers."

In the field of precision manufacturing, micro-screws are like the "red blood cells" of industry. Despite their tiny size, they carry crucial missions such as spacecraft's flight, the precise operation of medical equipment, and the lightweighting of consumer electronics. Shanghai Yijun Precision, founded in 2013, is a hidden champion in this niche market. Thanks to a decade of dedicated technological development and digital innovation, the company has become one of the few global manufacturers capable of consistently supplying micro-precision screws in the M0.5-M3 range. Its products achieve tolerances of ±0.002mm, making them a trusted choice for high-end industries such as aerospace, medical, and precision electronics. The challenge of micro-screw manufacturing lies in achieving "smallness and precision"—when the screw diameter is reduced to M0.5 (approximately 0.5 mm), the difficulty of thread accuracy, material strength, and surface treatment increases exponentially. Yijun Precision Machinery has broken through industry bottlenecks by building a three-in-one "design-development-manufacturing" technology system: Material Innovation: Yijun's independently developed high-strength alloy formula ensures screws are lightweight while maintaining toughness, meeting the weight reduction requirements of spacecraft. Process Innovation: Integrating CNC turning centers with optical inspection equipment creates a fully automated digital production line, enabling unmanned operation from rough cut to finished product. Precision Control: Leveraging ISO9001 certification, Yijun has established a dynamic quality traceability system, with each screw undergoing 360° inspection using an optical microscope. In the medical field, Yijun's M0.8 screws are used to secure heart stents. In the consumer electronics industry, its M1.2 screws support the precision hinges of foldable phones. In aerospace engineering, its M2.5 high-temperature-resistant screws withstand the extreme conditions of space. The company's technical director revealed, "Among global micro-screw suppliers, fewer than five can consistently supply M0.5 specifications. Our products have been certified by the European Space Agency and are currently being used in multiple International Space Station component projects." Yijun's intelligent transformation is quite forward-looking: within the production workshop, robotic arms and AGV logistics vehicles work in tandem, with real-time data streaming throughout every step. AI algorithms automatically adjust equipment parameters based on order requirements, reducing line changeover time to less than 10 minutes. This "flexible intelligent manufacturing" model enables it to handle both single-batch orders for consumer electronics in the millions and deliver small batches of highly customized aerospace-grade products. The evolution of micro-screw precision reflects the transformation of Chinese manufacturing from scale advantages to technological barriers. Yijun Precision's example demonstrates that by deeply cultivating technology in niche markets and building a digital moat, even "small parts" as small as 0.5 mm can leverage the vast market share of the global supply chain. As the company's founder stated, "Our goal isn't to be the largest screw manufacturer, but to become an irreplaceable technological solution in micro-precision manufacturing." As the wave of Industry 4.0 sweeps the world, Shanghai Yijun Precision is writing a new chapter in Made in China's history in the microscopic world with millimeter-level precision. This "industrial nail," embodying a belief in technology, may open the door to innovation for even more high-end industries.

In the field of precision manufacturing, the technical strength of a mold supplier directly determines the ultimate quality of the end product. Since its establishment in 2013, Shanghai Yijun Precision has rapidly risen to become a leading high-end mold supplier in the Yangtze River Delta region, leveraging millimeter-level precision as its core competitiveness. With an ISO9001-certified production system and a fully automated digital production line integrating CNC turning centers and optical inspection equipment, the company achieves unparalleled precision control of ±0.002mm tolerances, providing comprehensive solutions from design to manufacturing for industries such as automotive, medical, and electronics. In Yijun Precision's modern factory, a German DMG five-axis machining center and a Japanese Mitutoyo optical inspection system form the core of its fully automated production line. With a total investment exceeding 30 million yuan, this production line leverages the Industrial Internet of Things to achieve closed-loop management of design, processing, and inspection. Technical Director Li Gong stated, "Our thermal deformation compensation technology can control errors to within 0.5μm, equivalent to 1/200th the diameter of a human hair." This technological breakthrough has established the company as a leading supplier in the high-precision mold field, making it a designated supplier for several industry leaders. As one of the first precision manufacturing companies in Shanghai to receive ISO9001:2015 certification, Yijun Precision has established a three-level quality inspection system: spectral analysis of raw materials, online processing monitoring, and three-dimensional coordinate measurement of finished products. Its innovative "double inspection system" combined with intelligent inspection software achieves 100% full inspection coverage, resulting in a product yield rate of 99.8% for five consecutive years. This stringent standard has earned the company long-term trust from customers, with a repurchase rate exceeding 85%. In the new energy vehicle sector, Yijun Precision customizes battery case die-casting molds for leading companies, achieving sealing surface flatness within 0.01mm, addressing the industry's pain point of electrolyte leakage. In the medical device sector, its insulin pen molds utilize surface treatment technology to reduce injection resistance fluctuations to less than 0.5N, significantly improving the user experience. These cases demonstrate the company's mission of "driving industrial upgrading through precision manufacturing." As manufacturing advances toward high-end manufacturing, Shanghai Yijun Precision, as a mold supplier, is redefining industry standards with an accuracy of ±0.002mm. Its growth path demonstrates that only by prioritizing technology and focusing on quality can a company secure an irreplaceable position in the global industrial chain.