How to solve the strain in the process of drawing die processing?

By changing the characteristics of the contacts, the adhesive wear should be reduced to achieve the best results when solving the above problems. Let’s briefly analyze it below.

1. In terms of raw materials for forming workpieces, through surface treatment of the raw materials, such as phosphating, spraying or other surface treatments, a layer of non-metallic molds is formed on the surface of the forming materials, which can greatly reduce or eliminate the strain on the workpiece. This method is costly and requires additional production equipment and increased production processes. Although this method sometimes produces some effects, it is rarely used in actual production.

2. Adding a layer of film such as workpiece and mold PVC between the mold and the molding material can sometimes solve the problem of deep drawing.

For the assembly line passing mechanism, continuous film supply can be achieved. For the periodic production of stamping equipment, each production needs to add a layer of film, which affects the production efficiency. This method is generally more expensive and will generate a large amount of waste. For the production of small batches , Large-sized workpiece, it is best to use this method. For some smaller molding loads, solutions such as adding lubricants or adding EP additive lubricants can be used.

3. The contact characteristics of the stretched materials such as the convex and concave molds are changed by changing the surface treatment of the convex and concave mold materials or the surface treatment of the convex mold and the concave mold, or by selecting the appropriate mold material. Practical applications show that this is a cost-effective way to solve stretching problems.

In short, there are many ways to solve the problem of pulling on the surface of the die and the die. The specific situation should be determined according to the size of the workpiece, the amount of force, the production batch and the type of processing material.

Between the telescopic part and the mold, adding a layer of PVC and other films between the mold and the forming material can sometimes solve the problem of deep drawing.

For the assembly line passing mechanism, continuous film supply can be realized. For stamping equipment with periodic production, a layer of film needs to be added every time a workpiece is produced, which affects the production efficiency. This method is generally more expensive and generates a large amount of waste. For the production of small batches, large size workpieces, this method is best.

In terms of raw materials for forming workpieces, through surface treatment of raw materials such as phosphating, spraying or other surface treatment, a layer of non-metallic molds is formed on the surface of the forming materials, which can greatly reduce or eliminate the strain of the workpiece. This method is expensive, but also It is necessary to add additional production equipment and increase the production process. Although this method sometimes produces some effects, it is rarely used in actual production.

By changing the punch and die material or the surface treatment methods of punch and die, or by selecting appropriate die materials, the contact characteristics of the stretched material such as punch and die can be changed.

Practical applications show that this is a cost-effective solution to stretching problems.

Tie rod cracking remedy

(1), adjust the pressure of the pressing material and reduce the pressure.

(2) Adjust the stretching gap to make the gap larger and make the gap more uniform.

(3), adjust the radius of the die fillet. The corner radius of the die is too small, and the parts are easy to crack. Increasing the corner radius of the die can reduce the degree of cracking.

(4), adjust the punch radius.

(5), adjust the relative position of punch and die.

The above is about the content of the drawing die. The drawing die used is called the drawing die, abbreviated as the die. A drawing die is a special tool required for mass production. The deep drawing die is a very important die, and it is difficult to draw in batches without a qualified die. Advanced drawing processes do not require advanced dies and are therefore not possible. The tension process and the mold, the tension device and the tension material constitute the three elements of the tension process. Only when they are combined with each other can the tension be obtained. I hope the above can be helpful to readers.

What is the reason for the bursting of metal stamping parts? How to choose the design and processing materials of the stamping die?

Analysis of the reasons for the bursting of metal stamping dies 1. Unsmooth blanking In production, there is no demagnetization treatment and no demagnetization phenomenon; in production, there are card materials such as broken needles and springs; when assembling the mold, there is no leakage, rolling and blocking, which is a common phenomenon. If you […]

What problems will occur in the processing mold of automobile stamping parts?

In the process of automobile stamping parts, the pulling of the mold is mainly forming, drawing and other processes. Find the corresponding position according to the pulling position of the part, and use the oil stone to remove the burr, but pay attention to the uniformity of the rounded corners.

Due to the presence of burrs in automotive stampings, it is usually caused by excessive die clearance. It can be adjusted according to different types of molds and gap sizes to ensure that the size of the parts remains unchanged before and after repair, and at the same time, it can solve the burr problem.

The deformation of the blanking die in the production process, especially the deformation of the appearance parts, has a great impact on the quality of the product. Generally, it can be solved by increasing the blank holder, which is the right remedy.

During the punching process, the waste blocks the customized die holes of automobile stamping parts, which may be because the waste channel is not smooth, or the material channel has a taper, and the waste is not cleaned in time. Based on these three points, cleanup and improvements can be made.

When designing automotive stamping products, it should meet the requirements of use and technical performance to facilitate mold assembly.

Automobile stamping parts must adopt a plan to improve material utilization and reduce material loss, so that stamping parts can be as zero or less scrap as possible.

Design a simple form, reasonable structure, simple and easy process, avoid repeated use of other processing methods, which is conducive to stamping; try to use automatic stamping to improve production efficiency.

Automatic stamping parts, try to use the existing equipment and technology for processing, which is conducive to improving the life of the stamping die.

The automotive stamping parts industry adopts a large number of cold stamping processes to meet the requirements of multi-variety and mass production. For medium-sized cars, most of the covering parts, such as body outer panels, and some load-bearing and support parts, such as frame, automotive stampings and other auto parts.

Automobile stamping parts show that the steel used for cold stamping is mainly steel plates and steel strips, accounting for 72.6% of the whole vehicle. Cold stamping materials are closely related to the processing of automobile stamping parts. The quality of the material not only determines the performance of the product, but also directly affects the quality and cost of the product. Therefore, the rational choice of material selection is an important and complicated work.

1. Wrinkle control measures for vehicle stamping parts

1. Check the wrinkling state. When the crease is evenly generated around the part, it should be determined that the pressing force is insufficient, which can be eliminated by gradually increasing the pressing force. When drawing conical and hemispherical parts, the drawing bead should be added to increase the tensile stress in the diameter of the plate and eliminate wrinkles. Adopt the principle of external looseness and internal tightness to eliminate the problem of internal looseness and external tightness.

2. For lubricating oil, the oil brushing operation should be carried out in accordance with the requirements of the operating procedures system to ensure that the oil brushing and oil brushing position are correct and avoid wrinkling.

3. Under the premise of not affecting the requirements of the whole vehicle, replace the material of the parts with too soft blanks to ensure the quality of the parts and prevent wrinkling.

4. Improve the positioning and increase the pre-bending process if necessary to ensure that the stamping parts will not deviate. Adjust the shape of the sub-material surface to ensure the molding quality and prevent the shape of the pressing surface from not moving, resulting in uneven feeding.

5. For incorrect punching direction, use simulation software to analyze the punching process in the early stage of design to ensure the punching direction. When there are certain requirements for the quality of the die, it is necessary to improve the die.

The above is the relevant content of automobile stamping parts processing molds. During the processing of automobile stamping parts, the molds should be subjected to loads such as shock, vibration, friction, high pressure, stretching, and bending torque. Even if they work at high temperatures, the working environment is complex and easy to wear. Fatigue, fracture, deformation, etc. Therefore, the material requirements for mold work are higher than ordinary parts. Hope the above content can be helpful to readers.

What are the technical requirements for metal stamping die processing and assembly?

The module of metal stamping parts is suitable for centralized assembly. In the assembly process, the repair method and the adjustment assembly method are used to achieve assembly accuracy. In this way, higher assembly accuracy can be achieved, the processing requirements of parts can be reduced, and higher assembly accuracy can be achieved. The technical requirements for metal stamping die assembly are as follows:

1. The precision of the mold base should meet the requirements of the specification (JB/T8050-1999, JB/T8071-1995 “Technical Conditions for Die Sets” (JB/TT8071-1995). The height of the mold seal should meet the requirements of the drawings.

2. The assembled die, the upper die and the upper die along the guide column should slide smoothly and reliably.

3. The gap between punches should meet the requirements specified in the drawings and be evenly distributed. The working strokes of the convex and concave molds meet the technical requirements.

4. The relative position of positioning and stopper should meet the requirements of the drawing. The spacing between the mold guide plates should be consistent with the spacing specified in the drawing; the conductor surface should be parallel to the center line of the mold feeding direction; the guide material is equipped with a side pressure device, and the side pressure plate can slide flexibly and work reliably.

5. The relative position of the unloading and ejecting equipment should meet the design requirements, and the working surface should not have deviation or unilateral deflection, so that the packaged pipe or waste can be unloaded in time and ejected smoothly.

6. Reliable assembly of fasteners. The length of the bolt thread when connecting steel components is not less than the diameter of the bolt, and the diameter of the bolt when connecting castings is not less than 1.5 times; the matching length of the pin and each part should be greater than 1.5 times the diameter of the pin; the end surface of the pin must not be exposed. The surface of parts such as mold bases.

7. The blanking hole or discharge should be unobstructed, and it can be discharged by the packaged pipe or waste products.

8. Specifications should be replaceable. The set screws and dowels should fit properly with the holes.

9. The installation size of the metal stamping die on the press must meet the requirements of the selection equipment, and the lifting parts must be safe and reliable.

10. Under the production conditions, the tool should be tested under the production conditions, and the stamping parts should meet the design requirements.

The above is the relevant content of the metal stamping mold processing and assembly requirements, indicating that in the entire design and manufacturing process of the mold, the selection of mold materials and whether the heat treatment process is appropriate is very important. I hope the above can be helpful to readers.

What needs to be measured in the design and processing of automobile stamping dies?

1. During the design and manufacture of the blanking die, the following five points should be paid attention to:

1. Price:

In the design and manufacturing process of automobile stamping die, the first thing to consider is its price, which ultimately affects the sales of the product.

2. Quality:

The die often determines the safety factor of the car. Therefore, the quality of the die directly affects the sales of the product.

3. Humanity:

In addition, in the die stamping design, humanization is also an important factor to be considered. At the same time, attention should be paid to its maintenance and maintenance, so that the local replaceability of the mold is stronger. For more frequent parts, a higher bar should be set in the design, which is very beneficial for both parties. However, China’s auto industry rarely considers the humanization of stamping dies, and simply focuses on the simplification of processing and production processes, resulting in a lack of standardization of die parts and making maintenance more difficult.

4. Raw materials:

In recent years, my country has a great advantage in the selection of automotive die materials, mostly using alloy steel or alloy cast iron.

5. Accuracy:

In the process of mold manufacturing, the degree of fit and the consistency of the gap between the components directly affects the accuracy of each component.

2. Maintenance of automobile stamping die

Due to the poor working environment of automobile stamping dies, in the process of use, working parts, matching parts, sliding position wear and even damage often occur. However, due to the complex design and manufacturing process of the mold, high precision, long cycle and high cost, problems should be repaired in time during use to ensure accuracy and improve service life.

Although the maintenance of automobile stamping dies is very complicated, there are the following seven common faults and maintenance methods:

1. Flanging to form the deformation of the part:

Parts, especially the surface part, are often deformed during the flanging and forming process, which has a great impact on the quality of the parts. The usual solution is to increase the pressing force. If it is a spring pressing, you can use a spring method. For air cushion pressing, generally increase the air cushion force. If there is still local deformation after increasing the pressure, you need to find out the specific problem and detect the pressing material Whether there is a local depression on the surface, you can use the welding feeder plate, then weld the pressure plate, and then grind it with the lower surface.

2. Knife edge collapse:

The knife edge problem is one of the problems often encountered during the use of the mold. For example, for the miniaturized blade type, the chipping part is usually ground with a grinder, and the corresponding welding rod is used for welding to ensure that the welding is firm and not easy to chip again.

3. Raising:

The chipping of the edge mainly occurs in the processes of stretching, forming, and flanging. Find out the position where the mold should be pulled, flatten it with a whetstone, pay attention to the uniform size of the rounded corners, and then polish it with fine sandpaper.

4. Trimming and punching tape:

When trimming or punching, the die material or punching device is abnormal, resulting in trimming and punching. At this time, the corresponding parts of the mold should also be found according to the parts. If there is an abnormality in the molded unloading plate, repair welding should be carried out on the pressing plate. If there is no problem with the pressing of the die, you can check whether the die block has any burrs.

5. The waste is cut off:

Because the operator did not remove the waste in time during the production process, the waste was accumulated. Finally, under the pressure of the trimming block, it causes the scrap cutter to chip, thereby allowing the scrap to be cut. The repair method is similar to that of trimming and chipping.

6. Glitch:

Due to the gap between the edges of the die, burrs appear in the parts during trimming, punching and blanking. When the gap is large, the trimming and punching process adopts the method of trimming the concave die with a punch. In the blanking process, the trimming of the punch adopts the method that the die remains unchanged. When the mold gap is adjusted, it should be adjusted according to the size of the mold gap to ensure the rationality of the gap. The trimming and punching die adopts the method of placing the gap in the die. For the blanking die, the punching method should be used to ensure that the size of the parts does not change before and after repairing.

7. Punching waste blockage:

Due to the uneven waste channel, the reverse taper of the waste channel, and the failure to clean up the waste in time, the punching waste is blocked. A and B have smooth surfaces and equal diameters, which can ensure that waste products are not blocked.

The above content is related to the design, manufacture and maintenance of automobile stamping dies. At present, there are a large number of stamping die design companies in the market, but the quality is uneven. Therefore, it is very important to choose a suitable mold processing company. Hope this article can help readers.

What is the cause of the bending of the material during the mold processing?

In daily life, mold processing is easy to see. Many items and equipment require a tooling process to complete. Mold processing involves many industries, so the quality of mold processing is very important. During the customization process, a series of situations may arise. In fact, one of the phenomena we face is bending and deformation in mold processing. Then, throughout the machining process, the performance of the tooling and equipment should be considered in addition to the final requirements or installation. In this case, we need to consider the mold processing technology more. Why does the material bend during tooling?

1. Mould

In the mold customization process, if this happens, it is basically possible that the door is not positioned properly or the quantity is insufficient, or the position of the top product is inconsistent.

2. Technology

If the element has more technical aspects, for example a particularly high longitudinal line temperature can be considered during the molding process, or a special injection pressure can be considered during the molding process, as well as some other injection molding with shorter holding and cooling times. Good manufacturers basically give us more protection during processing. As it stands, if we really want to do custom processing, we have to consider additional processing issues. To the extent that this actual machining process requires more powerful handling systems and handling equipment, it can continue to be used.

3. Raw materials

In the actual processing process, all raw materials will affect the final cleanliness and will cause the deformation of the whole product. Due to the rework of raw materials, if it is not clean enough, or in the process of mold processing customization, its cleanliness will be different, and certain errors will occur during the processing process. Although the product is small, there are still a series of effects in the original processing process. Therefore, raw materials It is an important link in the cleaning and processing process, which must be paid attention to, because these small mistakes often determine the final success or failure of the entire mold processing.

Fourth, product design

Each product has its own unique design style in the mold design. This is due to its different processing requirements, so their product design requirements are different, but the product design is different due to different process requirements, so the processing thickness of the product or the overall partial design will be different. There are differences, so it is more reasonable to change the protrusion thickness, so in this case, the product structure needs to be considered.

In the process of mold processing, under the existing circumstances, if it is to be processed, it can be divided into different plastics for processing. Due to the different materials required for the required mold, the protective effect of the final treatment is also different. Of course, the mold is customized according to the working hours. Once the deformation is sufficient, it needs to be organized and reduced to a reasonable size before final processing to reduce the possibility of thermal decomposition.

Regarding the content of mold processing above, we consider the actual situation in the processing process. When bending and deforming, we must first adjust to achieve a reasonable processing state. Hope the above content can help readers.

What are the precautions in the design of drawing die?

1. The stretching material of the stretching die.

If the repeated test model does not meet the requirements, the material with good tensile properties can be replaced. Where there is quality, there is success. The commonly used specification is 08 steel, which is divided into boiling steel and stable steel. The price of boiling steel is low, the surface quality is good, but the angle is serious, it has a tendency of strain aging, and the appearance requirements are high.

Second, the surface finish of the drawing die.

In deep drawing, especially stainless steel plate and aluminum plate are easy to produce drawing when deep drawing, and tensile fracture is serious.

What are the requirements for stamping die processing parts materials?

1. Material requirements for blanking die.

The workpiece material used for thin plate punching dies requires high wear resistance and hardness, while thick plate punching dies require high fracture resistance, flexural strength and toughness in addition to high wear resistance and compressive yield point to prevent the die Broken or chipped.

2. The material requirements of the drawing die.

The material of the parts used in the mold is required to have good anti-adhesion (anti-seize), high wear resistance, hardness, certain toughness and good cutting performance, and the heat treatment deformation is small.

3. Material requirements for cold extrusion die.

Die working parts require high strength, high hardness and high wear resistance. In order to avoid impact fracture, a certain toughness is also required. Because the temperature rise during extrusion will be large, it must have certain heat resistance, fatigue resistance and thermal hardness.

In the work of blanking die, the key to ensure the life of the die is to select the die material reasonably and implement the correct heat treatment process. For different purposes of the mold, according to its working state, stress state, properties of processing materials, production batch, productivity and other factors, compare the above-mentioned required properties, and then select the variety and heat treatment process.

The above content about parts and materials in stamping die processing, stamping parts have good dimensional accuracy, the same die size, commonality and good interchangeability. I hope the above will help readers.

What are the steps in the precision mold processing process?

Therefore, not every enterprise can master the mold manufacturing methods and processes. When choosing a supplier, we must understand its processing capability, not only depends on the hardware equipment, but also combines the management level, processing experience and technical strength.

1. Design steps of precision mold processing technology?

1. Bottom processing, processing quality assurance,

2. Accurate billet benchmark, check two-dimensional, three-dimensional shape,

3. 2D, 3D surface rough processing, no need to install non-workpiece plane design (including safety platform surface, buffer mountable surface, pressure plate through plane, side datum) during the plane design process.

4. Find out the correct accuracy of the side datum before semi-finishing.

5. Semi-finishing 2D, 3D shape surfaces, finishing and various equipment are mounted on one side (including two limit block mounting surfaces and contact surfaces) mounting plate mounting surface and backrest, punch mounting surface, waste cutter mounting surface and The back and spring are responsible for the mounting surface and the contact surface, the working surface, the wedge mounting surface and the back surface are caused by the time limit of each project, and the semi-finishing each guide surface, guide hole, the remaining machining process design reference hole and height are used as the reference surface, and record information data.

6. Check the accuracy of the review processing technology.

7, fitter trimming process.

8. Before trimming, the datum surface of the process design datum hole should be aligned, and the allowance of the insert can be checked.

9. Finishing two-dimensional, three-dimensional, side punch and hole position, finishing process reference hole and height reference, finishing guide surface and guide hole.

10. Check and recheck the machining accuracy.

The above is the relevant content in the process of precision mold processing. For the same mold, different manufacturers sometimes have large price differences. Users should measure according to their own requirements. Hope this article can help you. If you need to make molds, welcome to consult.

What are the requirements for the materials for metal stamping processing?

When selecting the material of stamping parts, the metal stamping manufacturer must not only tap the function of use, but also write out the functional requirements of stamping processing and subsequent processes. What are the requirements for stamping materials for metal stamping parts?

1. Stamping parts have good stamping forming function.

For forming processes, such as stretching, bending, pitch difference, convex hull, etc. The material should have good stamping and forming function, that is, it has good crack resistance and good fit, otherwise the product will be easily deformed, broken, etc., making it difficult to repair the mold. For individual processing, a certain plasticity is required.

2. Do stamping parts have high nominal characteristics? The nature of the material should be flat and smooth, and its integrity is at risk. The material properties are good, it is not easy to break during molding, the mold is not easy to wear, and the quality of the parts is good.

3. The thickness of the stamping parts must meet the national standards.

Since a certain mold is only suitable for materials within a certain thickness range, if the thickness of the material is too small but too large, it will not only affect the quality of the parts, but also lead to the appearance of the product. In the process of proofing, trimming, etc., due to the large positive deviation of the thickness, it is easy to cause damage to the mold or the press.

The hardness test of the metal blanking material is important to determine whether the purchased sheet metal annealing degree is suitable for the subsequent stamping processing.

The industry calls stamping presses sheet metal forming, but there are some differences. Slab forming refers to the processing technology of slab, thin-walled tube, thin steel, etc. as raw materials, which is collectively referred to as sheet forming. In this environment, the deformation in the direction of the thick plate is usually not considered.

The above is about the relevant content of metal stamping parts processing materials. Generally speaking, the advantage of metal stamping parts processing is the metal stamping process. Because the surface of the material is not damaged, the surface quality is good, the surface is smooth and beautiful, and the metal surface is painted, electroplated, and waiting for the surface. Punishment is facilitated. Hope the above will be helpful to readers.

What are the principles for the selection of stamping die materials

Stamping parts are common processed parts in daily life. They are widely used due to their excellent processing properties. The processing principle of stamping parts is to use stamping equipment and stamping dies to process materials, so stamping dies are generally specialized. Sometimes, a complex part requires several sets of molds to be processed and formed, and the molds are manufactured with high precision and high technical requirements. It is a technology-intensive product. In addition, if the quality of the stamping die is not good, problems are likely to occur during the processing, so the selection of stamping die materials also has certain requirements.

First, the selection principle of stamping die material

1. Production batch, when mass production of stamping parts, the die punch and die material should be selected from high-quality, wear-resistant die steel. Other process structural components and mold auxiliary structural components also need improvement. When the batch is small, the performance requirements of the material can reduce the cost.

2. The performance of the material to be stamped. The conditions of use of the die. When the material to be stamped is hard or the deformation resistance is large, the convex and concave die of the die should be made of materials with good wear resistance and high strength. The aluminum bronze die has better adhesion resistance, so brushed stainless steel can be used. However, the guide column sleeve requires wear resistance and good toughness, so mild steel is mostly carburized and hardened. The main disadvantage of carbon tool steel is poor hardenability. When the section size of the stamping part is large, the center hardness after quenching is still low. . For fixing plate and stripping plate, it not only has sufficient strength, but also requires less deformation during the working process. In addition, the performance of parts can also be improved by cold and cryogenic treatment, by vacuum treatment and surface strengthening. For the cold extrusion die with harsh working environment of the convex and concave die, a die steel with sufficient hardness, strength, toughness, wear resistance and other comprehensive mechanical properties is selected, and it also has a certain red hardness and thermal fatigue strength.

3. Material properties, considering the cold and heat treatment properties of the material and the status of the factory.

In addition, it is common for blanking dies to burst during use, but in severe cases it is common for a die to be divided into several parts at a time. Of course, there are many reasons for the direct cracking of the template, and the procurement of materials from the mold design to the stamping process can all have an effect.

2. The main reasons for die bursting are as follows:

1. Unsmooth blanking.

In production, there is no demagnetization treatment and no demagnetization phenomenon; in production, there are broken needles, springs and other materials; when assembling the mold, there is no leakage, rolling and blocking, which is a common phenomenon. If you do not pay attention during the assembly process, if there are too many blanking holes or mold jams, air leakage, rolling blockage and foot blockage are prone to occur during the assembly process. This is a common phenomenon. It can easily happen if you are not careful during assembly, if there are too many blanking holes or if the mold has spacers.

2. Design process.

The strength of the die is not enough, the distance between the knife edges is too close, the structure of the die is unreasonable, the number of templates is insufficient, and there is no pad foot.

3. Heat treatment: improper quenching and tempering process leads to deformation.

The experimental results show that the heat treatment quality of the mold has a great influence on the performance and service life of the mold. Through the analysis and statistics of the causes of mold failure, it can be seen that mold failure accidents caused by improper heat treatment account for about 40%.

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In the processing industry, molds are indispensable equipment, and different processing industries choose different molds. Metal stamping dies and plastic processing dies are widely used in industrial production. As for the difference between them, many people will say that metal stamping dies are made of metal, and plastic processing dies are made of plastic. What is the essential difference between metal mold and plastic mold? What are their main areas of application? To understand the difference between the two, we must first understand what is a metal stamping die and what is a plastic die.

1. The difference between metal mold and plastic mold

1. Metal molds refer to stamping parts processed by using various presses and special tools in industrial production to process metal materials according to the shape required by the finished product. This special tool is often called a metal mold.

2. Plastic mold is a combination of plastic molds, which can be used for compression molding, extrusion molding, injection molding, blow molding and low plastic, and can be used as mold punch, die and auxiliary molding system. A range of plastic products that can be processed in various shapes and sizes.

3. From the perspective of the role of the mold, the metal mold is a mass production tool for metal products. The materials used are generally iron or copper or aluminum, the plastic molds are plastic products, and the raw materials used are also plastic raw materials.

4. The most fundamental difference between metal molds and plastic molds is the structure of the molds. Plastic molds have cooling systems, but metal molds do not. The molding principle of the product is also different. The plastic mold is cooled and formed after injection molding, and the metal mold is punched into a standard thickness steel plate.

5. Hardware molds and plastic molds are made of steel. Stamping metal molds generally use cold steel. If it is a pressure injection mold, hot-working steel is required. The plastic mold is generally hot-working steel. The mold is more complicated. Mold) There is no gating system and cooling system, which can be understood as: plastic mold processing is to cool plastic flow into the cavity in a closed space for cooling and forming.

Second, the metal stamping die has the following advantages

Due to the use of mold processing, metal stamping parts that cannot or are difficult to manufacture by other processing methods, are thin-walled, lightweight, have good rigidity, good surface quality and complex shapes can be obtained. The dimensional accuracy of the blanked parts is guaranteed by the mold, and the characteristics are exactly the same, so the general press can produce dozens of parts per minute, while the high-speed press can produce hundreds of parts per minute. Therefore, it is an efficient processing method.

3. Plastic processing molds have the following advantages

Plastic molds have high tolerances, low repetitive labor costs, and can use a variety of materials. The waste loss is far less than that of metal molds, and there is no need to continue to improve parts after plastic molds are formed.

The above is the relevant content of metal stamping dies and plastic dies. These two molds are suitable for different industries and different processing requirements, so the production methods of the molds will also be different. I hope the above will be helpful to readers.

Processing characteristics of metal stamping parts and sample processing of simple stamping dies

Metal stamping parts are very common in daily life, so the metal stamping processing industry has been widely used. Currently, there are more than ten hardware products and hundreds of products on the metal market. Mainly include: locks, tensioning, door and window hardware, home decoration hardware, HVAC hardware, architectural decoration hardware, tools, bathroom hardware, kitchen hardware, etc. But in the processing of metal stamping parts, some problems will inevitably be encountered, how to deal with and deal with? The following editors of Zhejiang Baifudu Electromechanical will take you to understand the processing characteristics of metal stamping parts and the simple processing of stamping mold samples!

Metal stamping parts rely on presses and dies to apply external forces to plates, steel bars, pipes and profiles to plastically deform or separate, so as to obtain the forming and processing methods of workpieces of desired shape and size. In the stamping process, if the quality of the section and the dimensional accuracy of the workpiece are high, it can be repaired or used directly after stamping. In the production process of precision stamping parts, in order to improve the stability of stamping parts, the number of processes must be increased.

Metal stamping products have a long manufacturing cycle, many processes, and many abnormal situations (involving rework, scrap, split, replenishment, replacement, buffer materials, etc.), and the production process requires tracking and cost analysis. In addition, during the production process, customers can insert orders in time according to market changes, which is unpredictable by hardware companies. Relying on manual management, of course, cannot meet the change requirements of customer orders. Only after the order is confirmed, can it be included in the management. Sometimes the order status changes, but there is no timely response, often in a hurry. This shows that how to start information construction has become the primary problem facing hardware enterprise decision makers.

As a highly isolated industry, metal stamping parts often encounter bottlenecks under traditional manual management in daily production. First of all, the market competition is fierce, and user needs are constantly changing. Many hardware companies mainly focus on small batches and medium batches, and the design and manufacturing process of products often change according to customer needs. Therefore, hardware companies need to develop a good production plan to improve the flexibility of production and enable it to adapt to the market. The author believes that the products of general hardware enterprises are produced according to orders (contracts), the product structure is complex, the parts are many, outsourced and self-made. In the production process, relying on traditional manual management to rationally optimize production, the workload of production management is very large. The information and data of the department cannot be shared in a unified standard and interface, and it is inevitable that the delivery time cannot be scientifically controlled, which affects the execution rate of the order.

Second, metal stamping parts manufacturers have many outsourcing factories, involving many outsourcing factories, using traditional manual management methods, how to track and control the product quality, price, reputation of the metal stamping factory, and how the purchasing department controls the advance quantity, Ensuring that production does not go wrong, does not cause inventory backlog, and ensures a more reasonable level of capital occupation is a headache for hardware companies.

In many cases, the number of operations of a bent part is mainly determined by the complexity of its structural shape, which is determined by the number of bending angles. If the bending radius of the curved part is smaller than the allowable value, an additional forming process is required. Similarly, the number of processes and material properties of the drawn part, the drawing height, the number of drawing steps, the drawing diameter, the material thickness and other conditions are also affected and need to be determined by drawing process calculations. If the corner radius of the drawn part is small, or there is a certain requirement for dimensional accuracy, another forming process needs to be added after drawing. According to this model, the number of processes to determine stamping parts should also meet the conditions of the company’s existing mold capacity and stamping equipment. The molding ability should ensure mold processing, and the requirements for assembly accuracy should be improved accordingly, otherwise the number of processes can only be increased. For simple blanking parts, single-pass stamping dies are used; on the contrary, due to the limitation of die structure or strength, the inner and outer contours of complex stamping dies should be divided into multiple parts, requiring multiple stamping processes.

Recently, after receiving quotations for metal stamping products, many customers suggest to make some simple stamping dies to make some samples for testing. For these customers, we recommend customers not to make simple molds from the beginning. Especially for the following reasons:

1. Stamping parts that basically meet the requirements of the drawings cannot be produced.

The customer wants to use a simple mold as a sample, but has not confirmed the product in the early stage, and wants to spend less mold cost to test the sample. However, dimensional accuracy cannot be guaranteed for products manufactured by simple molds, even if the customer cannot be sure of the dimensional failure caused by the product.

2. A simple die cannot guarantee the uniformity of stamping parts.

A simple die cannot guarantee that each die is the same, because a simple die often does not have accessories such as positioning and guide posts, and there will be different offsets for each punch, which leads customers to inspect the stamping parts. , no satisfactory results can be obtained.

3. Failure to mass-produce simple stamping dies will result in waste.

The simple-packed punching meme has a simple structure and low precision, and can only be mass-produced after the customer confirms the sample. This will cause a lot of waste.

In fact, if the customer does not confirm the stamping product in the later stage, there is basically no need to open a simple die for sample testing, and other processing techniques can be considered to achieve it. Most steels are stamped, and punching can be made by other methods with ribs, ribs, undulations, or flanging to increase stiffness.

The above is the relevant content of metal stamping parts processing. In short, processing products through stamping process has become an important means and development direction of modern industrial production. However, the disadvantages of stamping parts are high mold requirements, complex manufacturing, long cycle and high manufacturing cost, which limit small batch production. Therefore, most stamping parts are mass-produced, which also reflects the importance of molds. I hope it helps readers.

What is the reason for the punch falling off in the processing of automobile stamping parts?

In the process of automobile stamping, sometimes the die punch will suddenly fall off, so what causes the punch to fall off? In fact, the main reason for the analysis of punch dropout is that the punch is not strong. What is the reason why the punch is not fixed firmly? The main reasons are as follows:

1. For the fixed structure of the punch that is pressed into the interference, because the required amount of interference cannot be met during the manufacturing process, the method of “twisting and squeezing” is used to remedy it, so that the punch is easy to loosen.

2. If the punch is not fixed by steps or fasteners, punch thick, hard or viscous materials. If the gap between the stripper hole and the punch is too large, the discharge force will increase, causing the punch to pull out.

3. The rigidity of the punch or die frame is poor, and the punch is elastically deformed during punching, causing the punch to collide or get stuck with the stripper, increasing the unloading force and easily pulling out the punch.

4. The punch and die gap is too small, the working surface is rough, or the gap is sideways, which will increase the discharge force during punching and cause the punch to pull out.

5. When the punch is fixed with a low melting point alloy, there is no groove on the assembly side of the punch and the assembly hole of the punch fixing plate, which makes it easy to pull out the punch.

1. Why does gnawing occur during the processing of automobile stamping parts? How should it be prevented?

A bite is a touch blade. During the blanking process, a certain gap should be maintained between the die blades, and they should not collide with each other. There are four reasons for the collision of the blades.

1. Design: In terms of equipment, the punch is incorrect. If the punch is fixed by chiseling, it may cause the punch to loosen. Casting of low melting point alloys can also lead to punch loosening. The punching pressure is large, the punch root does not use a hard backing plate, and the lateral force of the punch is too large, which will cause the punch to loosen.

2. Molding: convex, concave mold or guide parts are not installed vertically.

3. The assembly of the upper and lower formwork, the fixed plate and the convex and concave formwork is not parallel.

The blanking gap is not uniform.

4. The installation of the punch does not meet the design requirements.

Second, the use of molds.

1. Repeated punching or stack punching, that is, stacking two or more blanks in a place where the blanks do not move for punching.

2. The scraps or blanking parts left on the mold are not removed in time.

Third, mold maintenance problems.

1. The wear of the mold parts is large, and the fitting clearance caused by the wear of the guide parts is too large, which cannot be repaired in time.

2. The mold maintenance assembly is loose.

In order to avoid die gnawing, a die with a guide should be used as much as possible, especially for a die with a small blanking gap. The fixing method of the punch should be carefully considered, and the manufacturing of the mold should be firm and reliable. The composite punching die should pay special attention to operate in strict accordance with the punching operation rules, clean the surface of the die in time, and avoid repeated punching and stacking. Strengthen the maintenance and management of molds to ensure that the molds are in good condition. Hope it helps readers.

How to avoid damage in metal stamping die processing?

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1. How to avoid damage as follows:

1. The sliding hinge cannot be made of aluminum alloy material, but stainless steel material should be used.

2. Sliding windows with a width greater than 1 meter, or doors and windows with double-glazed glass, should be equipped with double pulleys or use movable pulleys.

3. Hardware accessories should be Z-terminals, door and window locks. Handles, etc. should be installed behind the window and door frame to ensure accurate position and flexible switching.

4. When using fastening screws to install hardware, there must be a metal backing plate, and the thickness of the backing plate is at least twice the pitch of the fasteners. It cannot be used to fix plastic profiles, and non-metallic linings cannot be used.

5. The type, specification and performance of the hardware accessories used should conform to the current national standards and relevant boundaries, and should be used in conjunction with the selected plastic steel doors and windows.

6. Pay attention to maintenance after installation to avoid corrosion. When used every day, lightly close and lightly open to avoid damage caused by hard opening of the hard tube.

How to inspect metal stampings? Rockwell hardness tester is used for hardness test of metal stamping parts. Such as: small, irregularly shaped stamping parts, can be used to detect small planes, can not be used for ordinary desktop Rockwell hardness tester.

PHP series Rockwell hardness tester is especially suitable for hardness testing of such stamping parts. Aluminum alloy stamping parts are common parts in the fields of metal processing and mechanical manufacturing. The processing of stamping parts is a processing method in which metal sheets and strips are separated or formed using molds. It has a wide range of applications.

The main purpose of the hardness inspection of blanking parts is to judge whether the annealing degree of the metal plate is suitable for the processing of stamping parts in the future. In the processing of different types of stamping parts, there are requirements for plates with different hardness levels. Webster hardness tester can be used to test the processing of stamping parts. When the data exceeds 13mm, it can be replaced by a barcol hardness tester, and a barcol hardness tester can be used for pure aluminum or low-hardness aluminum alloy sheets.

As far as the stamping industry is concerned, stamping is sometimes referred to as sheet metal forming, but it is slightly different. What we call sheet molding is a forming method of plasticizing raw materials such as thin plates, collectively referred to as sheet forming. In this case, the deformation in the direction of the thick plate is generally ignored.

Second, optimize the planning method of metal stamping parts.

The reasonable planning of the mold is the basis for improving the durability of the mold. In order to improve the durability of metal stamping dies, unreasonable factors in product forming should be fed back in time during die planning. If you plan to punch a small hole metal mold, the method of adding a guide sleeve should be used to strengthen the strength of the small hole mold punching needle. Also, the guide needle should be as short as possible. Decreased length equals increased strength.

3. Appropriate heat treatment of metal blanking parts.

High-quality metal stamping dies and the selection of plates should be properly heat treated to improve the durability of metal stamping dies. Such as quenching, vacuum heat treatment, etc.

Fourth, the rational use of metal stamping dies can ensure processing accuracy.

In terms of hardware mold life, mold accuracy has a great influence on mold life. Before making the mold, the mold must be installed. Commissioning the mold requires locating all the holes and installing the mold prior to production. When the mold is installed, the straightness of the support surface of the mold and the fixed plate, and the uniformity of the distance between the hardware mold and the guide sleeve have strict requirements on the guiding accuracy of the guide post. The higher the manufacturing and installation accuracy, the more accurate the machined parts will be, and the higher the durability of the metal mold will be.

Fifth, choose the correct amount of punching.

In order to improve the durability of the hardware blanking die, the blanking die with high precision and high rigidity should be selected. For stamping more than 30%, it is better to use the servo to control the punch. The servo is equivalent to a transformer, with constant current and stable voltage, which not only protects the durability of the machine tool, but also improves the service life of the mold.

6. Reasonable use and protection of molds.

In order to improve the durability of metal stamping dies, operators must regularly protect and maintain the dies under reasonable conditions of use. It is best to maintain and repair the metal stamping dies every day, which can effectively avoid the appearance of metal stamping dies.

According to the above related content of metal stamping die processing, metal stamping parts are light in weight, satisfactory in strength and rigidity, and can be processed into parts of various shapes and sizes according to different uses and materials, and have a wider range of applications. Hope the above content can be helpful to readers.