quality Tungsten Carbide Die & Carbide Punches And Dies factory

.gtr-container-k9p2q7 { max-width: 100%; padding: 15px; color: #333; font-family: Verdana, Helvetica, "Times New Roman", Arial, sans-serif; line-height: 1.6; box-sizing: border-box; overflow-wrap: break-word; } .gtr-container-k9p2q7 p { margin: 0 0 1em 0; font-size: 14px; text-align: left !important; color: #333; } .gtr-container-k9p2q7 .gtr-heading-k9p2q7 { font-size: 18px; font-weight: bold; margin: 1.5em 0 0.8em 0; color: #2c3e50; text-align: left; } .gtr-container-k9p2q7 ul { list-style: none !important; margin: 0; padding: 0; } .gtr-container-k9p2q7 li { position: relative; padding-left: 25px; margin-bottom: 0.5em; font-size: 14px; text-align: left; color: #333; } .gtr-container-k9p2q7 li::before { content: "•"; color: #007bff; position: absolute; left: 0; top: 0; font-weight: bold; font-size: 14px; line-height: 1.6; } .gtr-container-k9p2q7 strong { font-weight: bold; color: #2c3e50; } @media (min-width: 768px) { .gtr-container-k9p2q7 { max-width: 800px; margin: 20px auto; padding: 25px; } } From October 7 to 10, 2025, Chongqing Henghui Precision Mold 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:

.gtr-container-x7y8z9 { font-family: Verdana, Helvetica, "Times New Roman", Arial, sans-serif; color: #333; line-height: 1.6; padding: 15px; max-width: 100%; box-sizing: border-box; } .gtr-container-x7y8z9 p { font-size: 14px; margin-bottom: 1em; text-align: left; } .gtr-container-x7y8z9 .gtr-main-title { font-size: 18px; font-weight: bold; margin-bottom: 1.5em; text-align: left; } .gtr-container-x7y8z9 .gtr-section-heading { font-size: 18px; font-weight: bold; margin-top: 2em; margin-bottom: 1em; text-align: left; color: #0056b3; } .gtr-container-x7y8z9 .gtr-equipment-item { margin-bottom: 1.5em; padding-left: 15px; border-left: 3px solid #007bff; } .gtr-container-x7y8z9 .gtr-equipment-name { font-size: 16px; font-weight: bold; margin-bottom: 0.5em; color: #0056b3; } .gtr-container-x7y8z9 img { max-width: 100%; height: auto; display: block; margin: 2em 0; border: 1px solid #ddd; box-shadow: 0 2px 5px rgba(0,0,0,0.1); } @media (min-width: 768px) { .gtr-container-x7y8z9 { padding: 25px; max-width: 960px; margin: 0 auto; } .gtr-container-x7y8z9 .gtr-main-title { font-size: 24px; } .gtr-container-x7y8z9 .gtr-section-heading { font-size: 20px; } .gtr-container-x7y8z9 .gtr-equipment-name { font-size: 18px; } } 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.

/* Unique class for encapsulation */ .gtr-container-a1b2c3d4 { font-family: Verdana, Helvetica, "Times New Roman", Arial, sans-serif; color: #333; line-height: 1.6; padding: 15px; max-width: 960px; margin: 0 auto; box-sizing: border-box; } /* Paragraph styling */ .gtr-container-a1b2c3d4 p { font-size: 14px; margin-bottom: 1em; text-align: left !important; word-break: normal; overflow-wrap: normal; } /* Heading styling */ .gtr-container-a1b2c3d4__heading { font-size: 18px; font-weight: bold; margin-top: 1.5em; margin-bottom: 1em; color: #0056b3; text-align: left; } /* Image styling */ .gtr-container-a1b2c3d4 img { max-width: 100%; height: auto; display: block; margin: 1.5em auto; } /* Responsive adjustments for PC */ @media (min-width: 768px) { .gtr-container-a1b2c3d4 { padding: 20px; } .gtr-container-a1b2c3d4__heading { font-size: 20px; } } 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).

.gtr-container-xyz789 { font-family: Verdana, Helvetica, "Times New Roman", Arial, sans-serif; color: #333; line-height: 1.6; padding: 15px; max-width: 800px; margin: 0 auto; } .gtr-container-xyz789 p { font-size: 14px; text-align: left; margin-bottom: 1em; } .gtr-container-xyz789-intro-paragraph { margin-bottom: 25px; font-weight: normal; } .gtr-container-xyz789-main-title { font-size: 18px; font-weight: bold; margin-bottom: 20px; color: #0056b3; text-align: left; } .gtr-container-xyz789-section-title { font-size: 16px; font-weight: bold; margin-bottom: 10px; color: #0056b3; text-align: left; } .gtr-container-xyz789-ordered-list { list-style: none !important; margin: 0 !important; padding: 0 !important; counter-reset: list-item; } .gtr-container-xyz789-ordered-list > li { position: relative; padding-left: 30px; margin-bottom: 20px; } .gtr-container-xyz789-ordered-list > li::before { content: counter(list-item) "."; position: absolute; left: 0; top: 0; font-weight: bold; color: #333; width: 25px; text-align: right; counter-increment: none; } .gtr-container-xyz789-custom-bullets { list-style: none !important; margin: 0 !important; padding: 0 !important; counter-reset: custom-bullet-counter; margin-left: 20px; } .gtr-container-xyz789-custom-bullets > li { position: relative; padding-left: 30px; margin-bottom: 5px; font-size: 14px; text-align: left; } .gtr-container-xyz789-custom-bullets > li::before { content: "(" counter(custom-bullet-counter) ")"; position: absolute; left: 0; top: 0; font-weight: normal; color: #555; width: 25px; text-align: right; counter-increment: custom-bullet-counter; } .gtr-container-xyz789 img { max-width: 100%; height: auto; display: block; margin-top: 15px; margin-bottom: 15px; } @media (min-width: 768px) { .gtr-container-xyz789 { padding: 25px; } } 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 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: Sufficient strength to avoid fracture or failure during the stamping process. Appropriate material selection and heat treatment to prevent excessive hardness and brittleness. 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. 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. 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. 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. 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.

.gtr-container-k9m2p7 { font-family: Verdana, Helvetica, "Times New Roman", Arial, sans-serif; color: #333; line-height: 1.6; padding: 20px; box-sizing: border-box; max-width: 100%; overflow-x: hidden; } .gtr-container-k9m2p7 p { font-size: 14px; margin-bottom: 1em; text-align: left !important; word-break: normal; overflow-wrap: normal; } .gtr-container-k9m2p7 .gtr-section-title { font-size: 18px; font-weight: bold; margin-bottom: 1.5em; color: #0056b3; text-align: left; } .gtr-container-k9m2p7 .gtr-quote { font-style: italic; margin-left: 20px; padding-left: 10px; border-left: 3px solid #0056b3; color: #555; margin-top: 1.5em; margin-bottom: 1.5em; } .gtr-container-k9m2p7 img { max-width: 100%; height: auto; display: block; margin: 20px auto; border: 1px solid #eee; box-shadow: 0 2px 5px rgba(0,0,0,0.1); } @media (min-width: 768px) { .gtr-container-k9m2p7 { padding: 30px; } .gtr-container-k9m2p7 .gtr-section-title { font-size: 20px; } } Chongqing Henghui Precision Mold Co., Ltd. recently announced the successful development and mass production of a complete set of high-performance precision molds, marking a key step forward in the company's technological innovation and high-end manufacturing. The molds, which include multi-station progressive dies, injection molds, and cold heading dies, are widely used in demanding industries such as automotive parts, consumer electronics, and micro-precision fasteners. The new generation of molds utilizes ultra-high-precision steel (SKD11/DC53) and nano-coating technology, combined with fully closed-loop CNC machining and precision EDM processes, significantly improving the mold's wear resistance, corrosion resistance, and service life. Intelligent computer-aided engineering (CAE) technology optimizes the structural design, increasing production efficiency and product tolerance stability by over 30% compared to traditional molds. Henghui's technical director said: "The full set of molds produced in this mass production achieves micron-level precision control, which is particularly suitable for the stable mass production of complex structural parts. We are committed to providing customers with one-stop solutions from mold design, manufacturing to commissioning, enabling the industry chain to reduce costs and increase efficiency." Currently, this batch of molds has passed the acceptance inspection of several leading companies in the industry and has been put into mass production, with excellent feedback. Chongqing Henghui will continue to deepen its roots in the field of precision manufacturing, using technology to inject new momentum into China's intelligent manufacturing.

I. Preliminary Heat TreatmentFor hypereutectoid steel stamping die forgings, normalizing should be performed first, followed by spheroidizing annealing to eliminate the network-like secondary cementite within the forgings, refine the grain structure, relieve internal stresses, and prepare the microstructure for subsequent heat treatment. Before quenching the stamping die parts (such as concave dies), low-temperature tempering should be conducted first. For dies with more complex shapes and high precision requirements, quenching and tempering treatment should be carried out after rough machining and before finish machining to reduce quenching deformation, minimize the tendency for cracking, and prepare the microstructure for the final heat treatment. II. Optimization of Quenching and Tempering Processes Protection of Parts During QuenchingQuenching and tempering are critical steps that affect the deformation or cracking of stamping die parts during heat treatment. For areas of critical die parts prone to deformation or cracking during quenching, effective protective measures should be taken to ensure symmetrical part shapes and cross-sections, as well as balanced internal stresses. Improvement of Heating MethodsFor small stamping punches and dies or slender cylindrical parts, preheating to 520–580°C before placing them in a medium-temperature salt bath furnace for heating to the quenching temperature can significantly reduce deformation compared to direct heating in an electric or reverberatory furnace. This method also helps control the tendency for cracking. Especially for high-alloy steel die parts, the correct heating method involves preheating first, then raising the temperature to the quenching level. The duration of high-temperature exposure should be minimized during heating to reduce quenching deformation and avoid the formation of microcracks. Determination of Heating TemperatureExcessively high quenching temperatures coarsen austenite grains and cause oxidation and decarburization, increasing the tendency for deformation and cracking. Within the specified heating temperature range, if the quenching temperature is too low, the internal holes of the part may shrink, reducing the bore size. Therefore, the upper limit of the heating temperature range should be selected for carbon steels. For alloy steels, higher heating temperatures may cause expansion of internal holes and an increase in bore size, so the lower limit of the heating temperature range is preferable. Selection of Cooling MediaFor alloy steels, the best method to minimize quenching deformation is isothermal quenching or martempering in a hot bath of potassium nitrate and sodium nitrite. This method is particularly suitable for stamping dies with complex shapes and precise dimensional requirements. For some porous die parts, the isothermal quenching time should not be too long, as it may cause an increase in hole diameter or pitch. Utilizing the characteristics of shrinkage during oil cooling and expansion during nitrate salt cooling, and applying dual-medium quenching appropriately, can reduce part deformation. Optimization of Cooling MethodsBefore placing parts into the cooling medium after removal from the heating furnace, they should be appropriately air-cooled first. This is one of the effective methods to reduce quenching deformation and prevent cracking. After placing the die parts into the cooling medium, they should be rotated appropriately, with changes in rotation direction, to ensure uniform cooling rates across all parts of the component. This significantly reduces deformation and prevents cracking. Control of Tempering ProcessAfter removal from the cooling medium, die parts should not be left in the air for too long but should be promptly placed into a tempering furnace for tempering. During tempering, low-temperature and high-temperature temper brittleness should be avoided. For die parts with high precision requirements, multiple tempering treatments after quenching can help relieve internal stresses, reduce deformation, and minimize the tendency for cracking. Heat Treatment Before Wire CuttingFor stamping die parts processed by wire cutting, graded quenching and multiple tempering treatments should be applied before wire cutting to improve the hardenability of the parts, ensure uniform distribution of internal stresses, and maintain a state of low internal stress. The lower the internal stress, the less the tendency for deformation and cracking after wire cutting.

We are thrilled to announce that our company participated in the prestigious International Fastener Expo 2023, showcasing our latest innovations in the world of fastening solutions.   The International Fastener Expo is renowned as the leading B2B event for the fastener industry, gathering professionals, experts, and companies from across the globe. This year's event, held from [Date] to [Date], witnessed an inspiring congregation of industry leaders, cutting-edge technologies, and networking opportunities, and we were proud to be a part of it.   Our booth at the expo was a hub of excitement and innovation, where we unveiled our newest line of fasteners designed to meet the ever-evolving needs of our customers. From industrial fasteners to specialty solutions, our offerings garnered significant attention and interest from industry peers and experts.   Key highlights of our participation at the International Fastener Expo include:   Cutting-edge Technology: We showcased our state-of-the-art fastening solutions, incorporating the latest advancements in materials and manufacturing techniques. Our commitment to staying at the forefront of technological innovations was evident in our offerings.   Collaboration and Networking: The expo provided a platform for us to connect with industry experts, potential partners, and customers, fostering valuable relationships and exploring new business opportunities.   Environmental Responsibility: Our display underscored our dedication to sustainable and eco-friendly fasteners, aligned with the global movement towards greener, more responsible manufacturing and construction practices.   Global Presence: We celebrated our global reach and our ability to serve customers around the world with reliable and high-quality fastening solutions.   Our team is excited about the connections made and the knowledge gained during this expo, which will drive our commitment to innovation and excellence in the fastener industry.   Thank you for your continued support and partnership as we continue to push the boundaries of fastening technology. Together, we are building a more secure and connected world.

The cold heading and cold extrusion molds manufactured by Henghui Mold are widely used in various metal forming fields. The main extruded materials include copper, stainless steel, titanium alloy, high carbon steel, nickel, silver tin oxide, aluminum, and other heavy metals.

    MACHINE TYPE s H L1(FIXED) L2(MOVING) 0 19 25 51 64 3/16 25 25,38, 55 75 90 1/4 25 25,40, 55, 65,80 100 115 5/16 25 25,40, 55, 65,80, 105 127 140 3/8 25 25,40, 55, 65,80, 105 150 165 1/2 35 55, 80, 105, 125,150 190 215 3/4 38 55, 80, 105,125,150 230 265 003 15 20 45 55 004 20 25 65 80 4R 20 25 60 70 6R 25 25, 30, 40, 55 90 105 8R 25 25, 30, 40, 55, 65 108 127 250 25 25, 40, 55 110 125 DR125 20.8 25, 40 73.3 86.2 (5。） DR200 20.8 25, 40, 53 92.3 105.2 (53) DR250 23.8 25, 40, 54 112 131.2 (Í)  

Henghui Precision Mold is committed to the innovation of cutting-edge metal forming technology, following the pace of the development of the molds of the world-class high-speed part forming machines, innovating the use of imported tungsten steel rough embryo materials, combining with the original manufacturing process, and continuous improvement in the field of internal hole grinding technology. The produced tungsten steel molds are used in batches in the imported high-speed part forming machines.

The main manufacturing process of fasteners includes: raw material procurement → re-inspection → blanking → cold heading or hot forging (bolts and nuts) → heat treatment → performance test → machining → wire rolling forming → table Surface treatment → surface inspection → NDT → dimension inspection → packaging and transportation and other processes. A large number of fatigue failure analysis results of high-strength bolts show that more than 70% of fatigue failure results from surface damage, decarburization at the joint of head and rod, obvious small cracks in thread processing or machining Discontinuities in knife marks, surface corrosion and quenched structure are not uniform because of high stress concentration there. Therefore, the promotion and implementation of the new standard GB/T3098.23, 24 and 25 need to be made great efforts, It is suggested that fastener quality management should be strengthened and optimized from design, procurement, manufacturing, installation, non-conformance management, inspection and test. In short, the fastener design should strengthen the universality and standard Standardization and identification code, procurement should limit the lowest bidding price, manufacturing inspection can take into account the third-party inspection unit's responsibility for multiple parties, installation strengthening records and operation according to standards, and strengthen the cause analysis of non-conformance management And experience feedback, inspection and re-inspection are parallel.

Exhibition name: Fastener Fair Global 2023, Stuttgart, Germany Organizer: Maibux Convention and Exhibition Group, UK Time: March 21-23, 2023 Venue: International Exhibition Center, Stuttgart, Germany   At its 9th edition, the exhibition represents an unmissable products and services showcase merged with various buying and networking opportunities for international suppliers, manufacturers and distributors of industrial fasteners and fixings, construction fixings,fastener manufacturing technology and related products and services.

Exhibition time: May 22-24, 2023 Exhibition venue: Shanghai World Expo Exhibition Hall (No. 1099, Guozhan Road, Pudong New Area, Shanghai) Exhibition area: 42000 M ² Number of exhibitors: 800 Standard booth: 2000 Expected audience: 36000 at home and abroad+ Sponsors: China General Machinery Components Industry Association, Fastener Branch of China General Machinery Components Industry Association, Shanghai Ailuo Exhibition Co., Ltd., Hannover Milan Exhibition (Shanghai) Co., Ltd Organizers: Shanghai Ailuo Exhibition Co., Ltd., Hannover Milan Exhibition (Shanghai) Co., Ltd Official website of the exhibition: www.Afastener.com