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  • 2023.02.03

    Failure Analysis and Solution of Stamping Die

    Stamping die is a special process equipment for processing materials (metal or non-metal) into parts (or semi-finished products) in cold stamping process, which is called cold stamping die (commonly known as cold stamping die). Stamping is a pressure processing method that uses the mold installed on the press to exert pressure on the material at room temperature to make it separate or plastic deformation, so as to obtain the required parts.1. Die damage:Mold damage refers to mold cracking, fracture, expansion, etc. In order to deal with mold damage, we must find out the causes from mold design, manufacturing process, mold use and other aspects. First of all, check whether the mold manufacturing materials are suitable and whether the corresponding heat treatment process is reasonable. Generally speaking, the heat treatment process of die material has a great impact on it. If the quenching temperature of the die is too high, the quenching method and time are unreasonable, the tempering times and temperature and the selection between elbows are improper, the die will be damaged after entering the stamping production. Improper design of the size or depth of the blanking hole can easily block the slot hole and damage the blanking plate. If the spring force is too small or the contour sleeve is not equal to the contour, the spring will break and the blanking plate will tilt, resulting in overlapping punching and damage to the parts.Improper fixing of the punch or insufficient screw strength may cause the punch to fall or break.When using the mold, the installation position and direction of the parts are incorrect, or the bolts are not tightened correctly. The working height is adjusted too low, and the guide post is not lubricated enough. Feed equipment failure, abnormal pressure, etc., It will cause damage to the mold. If foreign matters enter the mold, parts overlap, waste blocking and other conditions are not handled in time, and the processing and production continue, it is easy to damage the blanking plate, punch, lower template and guide post of the mold.2. Death:In the stamping process, once the clamping is not flexible or even stuck, the production must be stopped immediately to find out the cause of the stuck die and eliminate the fault. Otherwise, the fault will expand and cause chip damage.The main causes of mold sticking are: poor guide mold and inclination. Or there are foreign matters between the formwork, which makes the formwork unable to be flattened; The design of die strength is insufficient or the stress is uneven. Cause mold deformation, such as the design of hardness and thickness of mold base and template is too small, which is easy to be impacted and deformed by external forces; The mould position is not installed correctly, and the positioning error of the upper and lower moulds is out of tolerance. Or the precision of the press is too poor, resulting in mold interference; The punch strength is not enough, and the position of the big punch and the small punch is too close, which makes the lateral force of the die unbalanced. At this time, the punch strength should be improved and the guide protection of the discharge plate should be strengthened.Mold damage and maintenance:The cost of stamping die is very high. Generally speaking, mold cost accounts for 1/5-1/4 of the total cost of parts. This is because, in addition to the difficulty and high cost of mold manufacturing. After putting into production, the cost of mold repair and grinding maintenance is also very high, and the original cost of mold only accounts for about 40% of the total cost of mold. Therefore, timely maintenance of the die and prevention of die damage can greatly reduce the die cost of stamping production.Generally speaking, there are maintenance and scrapping problems after the mold is damaged. Non-natural wear failure of stamping die, such as damage of non-key parts. However, the small punch fracture, punch upsetting shortening, die cracking, blanking edge cracking and other failures can be completely restored to normal status through maintenance and put into stamping production again. But when the key parts of the die are seriously damaged, sometimes the punch and the die are damaged at the same time. The one-time maintenance cost exceeds 70% of the original cost of the mold, or the service life of the mold is close. Maintenance is of little significance. At this time, it is necessary to consider scrapping molds: except for large molds and continuous molds with complex structures. When the mold maintenance process is too complex, the mold maintenance cost is too high, the difficulty is too high, and the maintenance cycle is too long, which will seriously affect the normal production of stamping parts. We should choose to expire in advance, scrap and remanufacture the mould.

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  • 2023.01.28

    Four Materials in the Selection of Stamping Die

    Stamping die is a special process equipment for processing materials (metal or non-metal) into parts (or semi-finished products) in cold stamping process, which is called cold stamping die (commonly known as cold stamping die). Stamping is a pressure processing method that uses the mold installed on the press to exert pressure on the material at room temperature to make it separate or plastic deformation, so as to obtain the required parts. How to select materials for stamping dies?1. Low-alloy tool steelLow-alloy tool steel is based on carbon tool steel and added with appropriate alloying elements. Compared with carbon tool steel, it reduces the cracking tendency and quenching deformation, improves the hardenability of steel, and has better wear resistance. Low-alloy steels used for mold manufacturing include CrWMn, 9Mn2V, 7CrSiMnMoV (code CH-1), 6CrNiSiMnMoV (code GD), etc.2. Carbon tool steelT8A, T10A, etc. It is widely used in moulds and has the advantages of good processing performance and low price. However, the hardenability and red hardness are poor, the heat treatment deformation is large, and the bearing capacity is low.3. High speed steelIt has the highest hardness, wear resistance and compressive strength in high-speed steel die steel, and has high bearing capacity. W18Cr4V (code 8-4-1), W6Mo5Cr4V2 (code 6-5-4-2, American brand M2) and high speed steel 6W6Mo5Cr4V (code 6W6 or low carbon M2) with less tungsten content are commonly used in moulds. High speed steel also needs to be forged to improve its carbide distribution.4. High carbon medium chromium tool steelHigh carbon medium chromium tool steel for mould includes Cr4W2MoV, Cr6WV, Cr5MoV, etc. They have low chromium content, few eutectic carbides, uniform distribution of carbides, small heat treatment deformation, and good hardenability and dimensional stability. Compared with high carbon and high chromium steel with relatively serious carbide segregation, its properties are improved.

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  • 2023.01.17

    What are the key points for the maintenance of continuous stamping die

    Continuous die refers to the cold stamping die in which the press uses strip stamping raw materials to complete multiple stamping processes at the same time with several different stations on a pair of die in one stamping stroke. The strip moves at a fixed distance once after each stamping of the die, until the product is completed.1. Maintenance of punch and dieWhen disassembling the punch, pay attention to the original condition of the die so that it can be easily recovered in the subsequent die assembly process. If there is a gasket or displacement, the thickness of the gasket shall be engraved on the part and recorded.When replacing the punch, try to insert the demoulding module to see if the female mold is smooth, and try to evenly insert the gap between the female mold and the female mold; When replacing the female die, test whether the gap between the insert and the punch is even.In view of the shortening of the punch after grinding, it is necessary to add pads to meet the required length, and check whether the effective length of the punch is sufficient. It is necessary to find out the reason for replacing the punch, and check whether the corresponding concave die has broken edges and needs edge grinding.When assembling the punch, check whether there is enough clearance between the punch and the fixed block or plate. If there is a pressing block, check whether there is active margin. When assembling the female mold, first place it horizontally, then place a flat iron block on the surface of the female mold, and knock it in place with a copper bar. Do not tilt and force it, and chamfer the bottom of the female mold. After installation, check whether the mold surface is flush with the mold surface.After the assembly of punch, die and die core, check the protective belt to see whether all parts are installed incorrectly or upside down, check whether the die and die pad are installed upside down, whether the blanking hole is blocked, whether the newly replaced parts need to steal materials, whether the stealing is sufficient, and whether the parts that need to be locked are locked.Pay attention to the locking confirmation of the release screw. When locking, the cross locking shall be applied evenly from the inside to the outside. Do not lock one screw first and then the other screw, so as not to cause the formwork to fall off and tilt, causing the punch to break or the die precision to drop.2. Maintenance of formwork removalTo remove the template, first pry it up with two screwdrivers, and then balance it with both hands. When it is difficult to disassemble, check whether the mold is clean, whether the locking screws are all disassembled, and whether the mold is damaged due to sticking. Find out the cause and deal with it accordingly. Don't deal with it blindly.When assembling the demoulding, first clean the punch and demoulding, add lubricating oil to the guide column and the guide of the punch, and then put them in place smoothly, then press them in place with both hands, and repeat several times. If it is too tight, find out the cause (whether the guide post and guide sleeve are guided normally, whether there is damage to each part, whether the newly replaced punch can pass smoothly, and whether the template removal is correctly positioned), find out the cause, and then carry out corresponding treatment.If there are pressing blocks on the fixed plate, check whether there is enough space for stripping the back plate. The material contact surface between the demoulding and the concave die is pressed for a long time to produce an indentation. When the indentation is serious, it will affect the pressing accuracy of the material, resulting in abnormal instability of the product size, etc. The stripper insert and stripper plate should be repaired or reground.The accuracy of the contour sleeve should be checked. If the contour is not equal, it will cause the formwork to tilt, and damage its precise guidance and stable elastic compression function, which should be maintained.3. Inspection of guide partsCheck the fit clearance between the guide post and the guide sleeve, whether there are burns or wear marks, and whether the oil inlet state of the mold guide rail is normal. The wear of the guide parts and the damage of the precision reduce the precision of the mold. The mold parts will have problems. They must be properly maintained and replaced regularly.Check the accuracy of the material guide. If the guide pin is worn, it will lose the accuracy and function of the belt guide and must be replaced. Check the condition of release spring and ejecting spring to see if they are broken, or if they have been used for a long time but have lost their original strength due to fatigue, they must be regularly maintained and replaced, otherwise the mold will be damaged or the production will not be smooth.4. Adjustment of die clearanceThe die positioning hole is worn due to frequent assembly of die cores, resulting in large gap after assembly (loose after assembly), or uneven gap (positioning deviation), which will lead to poor section shape after punching, easy fracture of punch, burr, etc. Proper clearance adjustment can be made by checking the cross section after stamping.Small, small section, large clearance, large section, large burr, reasonable clearance can be obtained through displacement, and appropriate records shall be made after adjustment, or marks shall be made on the edge of the mold for subsequent maintenance operations.

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  • 2023.01.13

    Introduction of four main maintenance points of continuous stamping die

    Continuous die refers to the cold stamping die in which the press uses strip stamping raw materials to complete multiple stamping processes at the same time with several different stations on a pair of die in one stamping stroke. The strip moves at a fixed distance once after each stamping of the die, until the product is completed.1. Maintenance of punch and dieWhen disassembling the punch, pay attention to the original state of the die, so as to facilitate the recovery during subsequent die installation. If there is a gasket or displacement, the thickness of the gasket shall be engraved on the part and recorded. When replacing the punch, try to insert the demoulding die smoothly, try to find out whether the gap between the insert and the die is even, and try to find out whether the gap between the insert and the punch is even when replacing the die.In view of the fact that the punch becomes shorter after grinding, when the gasket reaches the required length, it is necessary to check whether the effective length of the punch is sufficient. Replace the broken punch, find out the cause, and check whether the corresponding female die has broken edges and needs edge grinding. When assembling the punch, check whether there is enough clearance between the punch and the fixed block or fixed plate. If there is a pressing block, check whether there is movement allowance. The assembly mould shall be placed horizontally, and then placed with a flat iron block. If a copper bar is used to knock the mould surface in place, the bottom of the mould shall be chamfered. After installation, check whether the mold surface is flush with the mold surface. After the assembly of the male mold and the female mold core, it is necessary to check the protective belt, whether all parts are installed incorrectly or reversely, whether the female mold and the female mold pad are installed reversely, whether the blanking hole is blocked, whether the newly replaced parts need to steal materials, whether the stealing materials are sufficient, and whether the parts that need to be locked are locked.Pay attention to the locking confirmation of the release screw. When locking, the cross locking shall be from the inside to the outside with balanced force. Do not lock one screw first and then the other screw, so as not to cause the formwork to fall off and tilt, causing the punch to break or the die precision to drop.2. Maintenance of formwork removalYou can use two screwdrivers to pry up the formwork evenly, and then use both hands to balance it out. When it is difficult to disassemble, check whether the mold is clean, whether the locking screws are all disassembled, and whether the mold damage caused by the material shadow should be blocked. After finding out the cause, carry out the corresponding treatment. Do not handle blindly. When assembling the demoulding, first clean the punch and demoulding, add lubricating oil to the guide column and the guide of the punch, and then put them in place smoothly, then press them in place with both hands, and repeat several times. If it is too tight, find out the cause (whether the guide pillar and guide sleeve guide are normal, whether each part is damaged, whether the newly replaced punch can smoothly pass the template removal, and whether the position is correct), and then make corresponding treatment. If there are pressing blocks on the fixed plate, check whether there is enough space for stripping the back plate. The material contact surface between the demoulding and the concave die is pressed for a long time to produce an indentation. When the indentation is serious, it will affect the pressing accuracy of the material and cause the product size to be abnormally unstable. The stripper insert and stripper plate need to be repaired or reground. The accuracy of the contour sleeve should be checked. If the profile is not equal, the template will tilt, and its precision guidance and stable spring function will be damaged, which should be maintained.3. Inspection of guide partsCheck the fit clearance between the guide post and the guide sleeve, whether there are burns or wear marks, and whether the oil supply status of the mold guide rail is normal. The wear of the guide parts and the damage of the precision reduce the precision of the mold. The mold parts will have problems. They must be properly maintained and replaced regularly. Check the accuracy of the material guide. If the guide pin is worn, it will lose the accuracy and function of the belt guide and must be replaced. Check the condition of release spring and ejector spring to see if they are broken or not broken after long-term use, but they have lost their original strength due to fatigue, so they must be regularly maintained and replaced, otherwise they will cause damage to the mold or make the production not smooth.4. Adjustment of die clearanceThe die positioning hole is worn due to frequent assembly of die cores, resulting in large gap (loose after assembly) or uneven gap (positioning deviation) after assembly, which will lead to poor section shape after punching, and the punch is easy to break, burr, etc. Proper clearance adjustment can be made by checking the cross section after stamping. Small, small section, large clearance, large section, large burr, reasonable clearance can be obtained through displacement, and appropriate records shall be made after adjustment, or marks shall be made on the edge of the mold., It is used for subsequent maintenance operations. In daily production, when the mold is in good condition, attention should be paid to collecting and preserving the original material belt. If the subsequent production is not smooth or the mold is changed, it can be used as a reference for mold maintenance. In addition, check and maintain the wear of the ejector pin and other auxiliary systems, whether the ejector pin can eject materials, and whether the guide pin and bushing are worn.

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  • 2023.01.07

    What are the applications of various continuous mold belt materials

    Continuous molds are various molds and tools used in industrial production for injection molding, blow molding, extrusion, die-casting, forging, smelting, stamping and other methods to obtain products. It mainly realizes the processing of the shape of the article through the change of the physical state of the formed material. Known as the "Mother of Industry". Widely used in blanking, die forging, cold heading, extrusion, powder metallurgy parts pressing, pressure casting, and compression molding or injection molding of engineering plastics, rubber, ceramics and other products.1. Single-side belt type:Widely used in connector terminals and small stamping parts.2. Double-sided feeding type:It is mainly suitable for relatively complex features, high bending height, wide material width, easy to be deformed in the process of belt conveying, and relatively large stamping parts. For those who cannot be conveyed by one-side belt, double-side belt material can be selected. Mode.3. Double belt type:The double-side belt type is mainly evolved from the double-side material belt type, and the purpose is also to save material. When using double-side material belts, two-side material belts are required. For example, if you add a side-by-side material belt, Then the material of a strip can be saved. This design can also produce different stamping products, but the stamping products must have the same demand quantity at the same time. This is not the case when arranging the same stamped products.4. Double independent belt type:Double independent strips are generally designed for material saving, and the two stamping products are arranged opposite to each other to achieve the purpose of material saving. It is also possible to arrange two different stamping products on each side for stamping at the same time. For example, when stamping different products, the stamped products must have the same required quantity at the same time. This is not the case when arranging the same stamped products.5. Middle belt type:It is mainly suitable for products with lower size requirements and lower stamping precision. Using this design method can generally improve the material utilization rate, but the relative stamping accuracy and stamping speed are relatively poor, so it is generally not recommended to use this mode design.

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  • 2022.12.30

    What are the application forms of various continuous die strip

    Continuous molds are various molds and tools used in industrial production to obtain products by injection molding, blow molding, extrusion, die-casting, forging molding, smelting, stamping and other methods. It mainly realizes the processing of article shape by changing the physical state of the formed materials. It is known as the "Mother of Industry". It is widely used in blanking, die forging, cold heading, extrusion, powder metallurgy parts pressing, pressure casting, and plastic or injection molding of engineering plastics, rubber, ceramics and other products.1. Single side belt type:Widely used in connector terminals, small stamping parts.2. Double side feeding type:It is mainly applicable to large stamping parts with complex features, high bending height, wide material width, and easy deformation in the process of belt conveying. If it can not be conveyed by single side belt, double side belt can be selected.3. Double belt type:The double belt type is mainly evolved from the double side belt type, which is also designed to save materials. When the double side belt type is used, two side belts are required to carry materials. If a side by side belt is added, the materials of one belt can be saved. This design can also produce different stamping products, but the stamping products need to have the same quantity at the same time. This restriction is not applicable to the arrangement of the same stamping products.4. Double independent belt type:The double independent material belt is generally designed to save materials. Two stamping products are arranged in pairs to save materials. Two different stamping products can also be pressed at the same time on one side of each row. For example, when stamping different products, the stamping products must have the same quantity required at the same time. This restriction is not applicable to the arrangement of the same stamping products.5. Intermediate belt type:It is mainly applicable to products with low size requirements and stamping accuracy. This design method can generally improve the utilization rate of materials, but the stamping accuracy and stamping speed are relatively poor. It is generally not recommended to use this design mode.

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  • 2022.12.22

    What should be paid attention to when designing a continuous mold

    The continuous die refers to the cold stamping die in which the press uses ribbon stamping raw materials in one stamping stroke, and uses several different stations on a pair of dies to complete multiple stamping processes at the same time. Each time the die is punched, the strip moves at a fixed distance until the product is completed.Continuous die1. Reasonably determine the number of working steps: the number of working steps of the continuous die is equal to the sum of the single decomposition process. For example, the number of working steps of the punching descending continuous die is usually equal to the sum of the two single processes of punching and descending. However, in order to improve the strength of the stamping die and facilitate the installation of the punch, sometimes several steps can be completed according to the number of inner holes. The principle for determining the number of working steps is that the less the number of working steps is, the better. The fewer the number of working steps is, the smaller the cumulative error is, and the higher the dimensional accuracy of the punching workpiece is without affecting the strength of the die.2. When arranging the sequence of punching and blanking processes, the punching process should be put in the front, which can not only ensure the direct transportation of materials, but also use the punching as the guide positioning hole to improve the accuracy of the workpiece. However, when it is associated with some bending dimensions or protruding parts, the punching position shall be determined according to the actual situation.3. In the workpiece without round hole, in order to improve the accuracy of feeding step, the process hole can be designed in the first step of the female die, so that the process hole can be used as a guide to improve the accuracy of the stamping part. However, in the current mold design, we have gradually or completely adopted the outer frame guide belt. This is conducive to ensuring the machining accuracy of complex workpieces.4. For different holes with the same size and high accuracy requirements, the same step of forming shall be arranged without affecting the strength of the die.5. Steps with higher dimensional accuracy requirements should be arranged in the last process as far as possible, while steps with lower accuracy requirements should be arranged in the previous process, because the higher the step, the greater the cumulative error.6. In a multi-step continuous mold, the steps of table punching, cutting, grooving, bending, forming, cutting, etc. should generally be arranged in the order of the separation process of punching, cutting, grooving, etc. in the first place, then the bending, drawing and forming process, and finally the cutting and unloading process.7. When flushing porous processes with different shapes and sizes, try not to put large holes and small holes in the same step at the same time to ensure the accuracy of hole spacing during mold repair.8. In the design, if the forming and blanking are completed on the same die, the forming punch and blanking punch shall be fixed separately, and the surface shall not be fixed on the same fixed plate. Try to fix the forming punch on the stripper. The backplane is mounted at the rear.9. In the design, the forming part of each step must be kept on the same feeding line without damage.10. For the die with many process steps and bending steps, the cutting edge of the female die shall be in the block structure as far as possible to achieve rapid replacement and grinding.11. For the fixing method of punch, when realizing continuous punching, the fixing method of hanging platform and counter pressing block shall be adopted to ensure that the punch will not fall off and damage the mold during continuous punching.12. If the die structure strength and position allow. Floating guide pins shall be used for multi-step dies as far as possible.13. Interface form of cutting boundary. In the continuous die, the inexperienced person often cleans the interface. I suggest using a semicircular incision.14. The round hole with the product as the reference hole shall be cut synchronously with the pilot hole. If the edge distance of the round hole is small and the hole size is required, the shape shall be cut before punching.

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  • 2022.12.16

    How to Select Material for Stamping Die Economically and Effectively

    Stamping die is a special process equipment for processing materials (metal or non-metal) into parts (or semi-finished products) in cold stamping processing, which is called cold stamping die (commonly known as cold stamping die). Stamping is a kind of pressure processing method to obtain the required parts by applying pressure on the materials with the die installed on the press at room temperature to cause separation or plastic deformation.The modernization of mold design and manufacturing is the basis for the development of mold industry. With the development of science and technology, computer technology, information technology, automation technology and other advanced technologies continue to penetrate, intersect and integrate with traditional manufacturing technologies, and transform into advanced manufacturing technologies.Reasonable selection of die materials and correct heat treatment process are the key to ensure the life of the die. For molds for different purposes, comprehensive consideration shall be given to their working conditions, stress conditions, processing material properties, production batches and productivity., Emphasize the above requirements, and then select the steel type and heat treatment process accordingly.When the production batch of stamping parts is large, the punch and die materials of the working parts of the die should be die steel with high quality and good wear resistance. The materials of other process structural parts and auxiliary structural parts of the die shall also be improved accordingly. When the batch size is small, the requirements for material properties should be appropriately relaxed to reduce costs.Stamping die uses various metal and non-metallic materials, mainly including carbon steel, alloy steel, cast iron, cast steel, hard alloy, low melting point alloy, zinc base alloy, aluminum bronze, synthetic resin, polyurethane rubber, plastic, birch laminate, etc.The materials used for making moulds shall be of high hardness, high strength, high wear resistance, appropriate toughness, high hardenability, no deformation (or small deformation) after heat treatment, no cracking during quenching, etc.When the material to be punched is hard or has large deformation resistance, the punch and die of the die shall be made of materials with good wear resistance and high strength. When drawing stainless steel, aluminum bronze master die can be used because of its good adhesion resistance. However, the guide post and guide sleeve require wear resistance and good toughness, so the surface carburizing and quenching of low carbon steel are often used.Another example is that the main defect of carbon tool steel is poor hardenability. When the cross section size of a die part is large, its central hardness is still low after quenching. However, when working on a press with a large number of strokes, it becomes an advantage due to its good impact resistance. For the fixed plate and unloading plate parts, not only should they have sufficient strength, but also the deformation should be small in the working process.In addition, cold treatment and cryogenic treatment, vacuum treatment and surface strengthening can also be used to improve the performance of die parts. For cold extrusion dies with poor working conditions of male and female dies, die steel with sufficient hardness, strength, toughness, wear resistance and other comprehensive mechanical properties shall be selected, and at the same time, it shall have certain red hardness and thermal fatigue strength.

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  • 2022.12.09

    ow many automobile die characteristics do you know

    In recent years, the rapid development of China's automobile industry has greatly driven the development of the automobile die industry. Because the automobile die is a technical product and a typical customized product, especially the technology content of the automobile panel die is very high.How to improve production efficiency, shorten development cycle, improve mold technology, reduce production costs has been a difficult problem for mold enterprises.Some new features in the mold manufacturing process:1. Parallel production organizationAt present, concurrent engineering is widely used in mold production organization. Generally, the process of technical preparation, production preparation, mold processing and debugging in the mold development process should be parallel as much as possible, that is, production preparation, processing technology and NC program design should be parallel.The production plan must first arrange drawing and forming dies, then flanging and molding dies, then trimming and punching dies, and finally blanking and punching dies. Only in this way can we achieve balanced production and provide automobile factories with samples in advance2. NC machining of solid typeAt present, mold manufacturers are basically using the real type manufacturing process. The NC machining production of the solid model is completed through the process editing of the solid model (such as the machining allowance of the machining surface, the layered editing of the model, etc.), followed by NC programming, foam blank blanking, NC processing, manual bonding and trimming.Thus, the production staff of the real mold has changed from manual production to a large number of numerical control programming. The simple manual bonding and finishing work on the site is performed by temporary workers. The numerical control production of the real mold directly improves the precision of the casting, bringing great advantages for the subsequent fine processing.

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  • 2022.12.02

    Introduce the manufacturing method of thick continuous stamping die

    Stamping forming process is a processing method of forming workpieces with required shape, size and performance by applying external force to plates, pipes, etc. fixed in the mold by the press to make them deform or separate.Stamping process is characterized by fast speed and large batch. Stamping die is used for stamping. In high-speed batch production, the structure and precision of stamping die can directly affect the quality and production efficiency of stamping parts.In the prior art, due to the strong specificity of the stamping die, when the product structure is relatively complex and multiple processes such as blanking, drawing and bending are required, different dies are often used to achieve the corresponding processes; This requires the development of multiple sets of molds, which leads to the lack of close connection between processes and reduces production efficiency.In view of the shortcomings of the prior art, the utility model aims to provide a thick material continuous stamping die, which has high production efficiency of completing multiple processes in a stamping process.To achieve the above purposes, the utility model provides the following technical solutions:A thick continuous stamping die comprises an upper die base and a lower die base; The upper mold base is fixedly connected with an upper base plate, and the upper base plate is fixedly connected with an upper splint; The lower mold base is fixedly connected with a lower base plate; The utility model is characterized in that: the utility model also comprises a middle template;The middle template is connected with the upper splint through a contour sleeve assembly, and an elastic member that abuts the middle template is fixed on the upper template seat; A number of stripper plates are fixedly connected to the middle template, and a number of punch components penetrating the middle template and stripper plates are fixed on the upper clamping plate; The lower base plate is fixedly connected with a lower template equal to the stripper plate; When the mold is closed, the stripper plate and the lower template press the metal strip tightly.In this way, the upper clamping plate is used to fix the punch assembly, and the setting of the upper and lower base plates makes the force of the middle template, stripper plate and lower template more uniform during the stamping process;When the die is closed, the punch components threaded on each stripper plate complete different stamping processes for metal strips at the same time; The elastic part is arranged so that the middle template is separated from the upper clamping plate when opening the mold, so that the stripper plate scrapes the metal strip off the punch assembly; So as to improve the production efficiency.Further setting: the punch component comprises a punching punch and a drawing punch; The lower template is provided with a blanking hole for the punching punch to pass through, the lower template is provided with a female die entry block, and the female die entry block is provided with a forming hole for the drawing punch to extend into.In this way, the punching punch and the drawing punch are set to punch and extrude the metal strip in one stamping process, thus improving the processing efficiency.

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  • 2022.11.25

    What are the differences between standard parts and non-standard parts of automobile dies

    The standard parts of automobile dies refer to the general name of metal parts used in stamping dies, plastic molds or FA automation equipment exclusively in the die industry.Mold accessories are widely used in various types of plastic molds, stamping molds, automotive, electrical and aviation manufacturing fields.1. Mold non-standard partsNon standard parts of moulds generally refer to the moulds with different specifications and shapes and structures relative to standard moulds. Generally speaking, non-standard mold parts are processed by suppliers according to drawings and requirements provided by customers; The mold accessories stand out in the hardware accessories because of their high precision requirements and high quality requirements. All mold accessories have very high requirements for their industrial and technical equipment, and the non-standard mold degree is up to 0.001 mm tolerance.2. Mold standard partsGenerally speaking, the mold standard parts are standardized, unnecessary and popular. The standard parts can be subdivided into plastic mold accessories, metal punch mold accessories and automatic machinery accessories.Hardware die accessories include: H-type straight body punch, A-type secondary punch, edge forming punch, K-type budding punch, B-type guide punch, A-type punch, punch, die, bushing, high-speed steel round bar, ultra-fine tungsten steel round bar, powder high-speed steel round bar, floating pin, floating material pin, stop screw, locating pin (fixed pin), contour sleeve, guide post, guide sleeve, grade chrome plated guide post, grade copper titanium alloy guide sleeve, self-lubricating guide sleeve Inner guide pillar assembly, sliding guide pillar assembly for mold base, ball guide pillar assembly for mold base, detachable ball guide pillar assembly, outer guide pillar assembly, guide pillar, hexagon screw, contour screw, etc.

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  • 2022.11.18

    What are the requirements for processing accuracy of automobile dies

    In a narrow sense, the automobile die is the general name of the die for punching all the stamping parts on the automobile body, that is, the "automobile body stamping die", for example, the flanging die for the top cover, the pressing die for the beam reinforcement plate, etc.Now let's listen to the analysis of automobile mold processing factory. What are the requirements for automobile mold processing accuracy?The manufacturing accuracy of die size shall be within 0.005~0.02mm; The perpendicularity shall be within the range of 0.01~0.02mm; Coaxiality shall be within 0.01~0.03mm; The parallelism of the upper and lower planes of the movable and fixed mold parting surfaces shall be within the range of 0.01~0.03mm.After the mold is closed, the gap between parting surfaces shall be less than the overflow value of the formed plastic, and the parallelism of other template mating surfaces shall be within the range of 0.01~0.02mm; The fitting accuracy of the fixed part is generally within the range of 0.01~0.02mm;If the small core has no requirements for insertion or has little impact on the size, a clearance fit of 0.01~0.02mm on both sides can be adopted; The fitting accuracy of sliding part is generally H7/e6, H7/f7 and H7/g6.Note: If there is an insert on the mirror surface that is attached to a step, the fitting should not be too tight, otherwise, when the insert is knocked back from the front, the tool used for knocking is easy to damage the mirror surface. If it does not affect the product size, the bilateral clearance of 0.01~0.02mm can be used for fitting.

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