What are the causes of product wrinkling and how to prevent it?

1. Analysis of the causes of wrinkling of tensile parts

The way to avoid wrinkling is to ensure that the mold can hold down the material during the stretching process and to ensure a reasonable speed of movement of the sheet. If the sheet moves too fast when the product is stretched, it will cause wrinkling; on the other hand, if the sheet moves too slowly, it will cause the stamping to crack.

1. Select reasonable pressing equipment

When selecting the pressing equipment, the pressing equipment compresses the deformed part of the blank, and has a significant effect on the pressing material to avoid the flange part from arching and wrinkling. Press material should be appropriate. The pressing equipment is divided into two types: elastic pressing and rigid pressing. Elastic equipment is suitable for shallow drawing and rigid equipment is suitable for deep drawing.

2. Reasonable selection of drawbeads

Setting drawbeads on the binder surface is a useful method to control deformation resistance. The drawbead can well adjust the movement of the material, so that the material movement resistance of each part in the drawing process is uniform, so that the amount of material flowing into the cavity meets the needs of the appropriate parts, and avoids wrinkling and cracking. For curved stretched parts with messy shapes, especially those with small flanges, drawbeads should be set to increase the radial tensile stress of stretching and control wrinkling; the setting direction of the drawbeads is in the radial direction. The part with less stress, that is, the part where the sheet is easy to move. For parts with smaller flanges, some materials (process supplementary materials) can be appropriately added in order to set tensile ribs, and this part can be removed when trimming. For drawn parts with large difference in drawing depth, the draw bead should be set in the part with less material feed, so that too much material in this part can be arranged to be pulled into the cavity of the die to avoid wrinkling.

2. Analysis of the causes of wrinkling of tensile parts

There are many reasons for the wrinkling of the stretched parts during the stretching process, the main reasons are as follows:

1. The drawing depth of the stamping part is too deep, which causes the sheet to move too fast during the feeding process, causing wrinkles.

2. The R angle of the die of the stamping part is too large during the stretching process, which leads to the fact that the punch cannot press the material during the stretching process, resulting in the sheet material moving too fast and causing wrinkles.

3. The pressing ribs of stamping parts are unreasonable, the pressing ribs are too small, and the direction is incorrect, which cannot effectively prevent the sheet material from moving too fast, causing wrinkling.

4. The pressure of the ejector is too small, so that the stamping parts are not formed completely and wrinkle is formed.

The above is the relevant content about the reasons for the wrinkling of stamping products. Of course, the wrinkling of products may also be due to problems with the parameters in the production process, and the parameters need to be redesigned. There are many reasons for product wrinkling. To prevent the cause of wrinkling, we can also check the origin.

Drawing parts processing standards and process precautions

1. Processing standard of drawing parts

Stretching parts are workpieces obtained by stretching and deforming the sheet by mechanical equipment. Now Xiaobian will introduce the production standards of our stretching parts for you.

1. The first-wall surface, bottom surface and wall surface of the deep-drawing part, and the corner radius of the four corners of the rectangular part should be appropriate. mm2rd1, mm5.1r2d.

2. The shape of the stretched part should be simple and symmetrical, and it should be stretched at one time as much as possible.

3. For parts that need to be stretched many times, on the premise of ensuring the required surface quality, traces that may be produced on the inner and outer surfaces should be allowed.

4. On the premise of ensuring the assembly requirements, the side wall of the deep drawing part should be allowed to have a certain slope.

5. The dimensions of the deep-drawn parts should be marked with their outer or inner dimensions, and the inner and outer dimensions should not be marked at the same time. With trapezoidal deep-drawing parts, the dimension in the height direction should generally be based on the bottom. If the upper part is the benchmark, the height dimension is not easy to guarantee.

6. The distance from the hole on the bottom or flange of the deep drawing piece to the side wall should be appropriate.

2. Precautions when using tensile parts

As we all know, tensile parts are prone to residual stress during machining, and there is a high residual stress near the yield limit. Most residual stresses have significant adverse effects on components, such as reducing their actual strength, fatigue limit, stress corrosion and brittle fracture. Due to the relaxation of residual stress, the parts are warped, which greatly affects the dimensional accuracy of the parts. So, what should we pay attention to when working with extruded parts? Let our stretched parts manufacturers explain it to you.

1. Regularly check the turntable and die mounting seat of the punch press to ensure the coaxial accuracy of the upper and lower turntables.

2. Before using stretch metal stamping parts, it is necessary to strictly inspect, clean up dirt, and carefully check that the guide sleeve and mold of stretch stamping parts are well lubricated.

3. In order to ensure the service life of the drawing and punching parts, the die spring should be replaced regularly to prevent the spring from fatigue damage and affect the use of the drawing and punching parts.

4. When installing the mold, the puncher should use softer metals (such as copper, aluminum, etc.) to make operating tools to prevent damage to the drawing punch during the installation process.

5. When the punch and die edge of the pulling and pressing part are worn, they should be stopped immediately and ground in time, otherwise the wear degree of the die edge will be rapidly expanded, the die wear will be accelerated, and the quality of the stamping parts and the life of the die will be reduced.

6. According to the installation procedure of the mold, install the convex and concave mold on the turntable to ensure that the direction of the convex and concave stretched stamping parts is consistent, especially the direction requirements (non-circular and square), to prevent installation errors and reverse installation.

3. Precautions and uses for the processing process of drawing parts

Have you ever wanted to ask how much you know about the accessory product of tensile parts? I am afraid that few people know what this accessory is used for and how it is processed. This kind of drawing part is a shaped slab or hollow part drawn to make various open stamping parts. This kind of workpiece often appears in our daily life, but we have not really understood the purpose and function of the product. Next, we will introduce you to the production process considerations and performance aspects of stretched parts.

Due to the special production process of wire drawing, this production method can be made into thin-walled parts with complex shapes such as cylinder, box and spherical. Rally has its unique production method in tractors, electrical appliances, electronics and other industrial and daily necessities, so it has a considerable position. If the drawing parts are used as installation and processing items, if there is any missing or missing, it will cause the valve to lose control and damage the piston and other workpieces, and if it is used in the case of missing installation, it will cause serious failure, which is also a detail to pay attention to. question.

Unturned tire casings stacked for a long time will be deformed by squeezing. If a squeeze condition occurs, the filtering effect is not reliable. Therefore, we need to pay attention to all aspects of our workflow and daily routines so that the stretched products we produce are fully functional.

The above is the processing standard and process description of drawing parts. Everyone should know about it. Therefore, the manufacturer of tensile parts reminds you that only the correct treatment of tensile products can play an important role in its performance. In addition, the service life is also highly ductile. I hope the above will be helpful to readers.

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 are the requirements for die processing of metal stamping parts?

Stamping parts are mainly formed by stamping with the help of metal or non-metal plates under the action of a press. The main features are as follows:

1. Main features of stamping parts

(1) Stamping parts are made by stamping when the consumables are small. The parts are light in weight and good in rigidity. After plastic deformation, the internal structure of the metal is improved, and the strength of the stamping parts is significantly improved.

(2) The dimensional accuracy of the stamping parts is high, the size of the stamping parts is uniform with the same die, and the interchangeability is good. General assembly and use requirements can be met without machining.

(3) During stamping and forming, since the surface of the material is not damaged, the surface quality is good, and the appearance is smooth and beautiful, which provides convenient conditions for surface treatment such as spraying, electroplating, and phosphating.

Dies used for stamping parts are usually specialized. Sometimes, a complex part requires several sets of molds to machine and shape. In addition, the mold manufactures high-precision, technology-intensive products. Therefore, only large-scale production of stamping parts can fully reflect the advantages of stamping processing, so as to obtain better economic benefits. However, there are also some problems and deficiencies in the stamping process. It is mainly manifested as noise and vibration during the stamping process, and operator accidents often occur. However, these problems are not entirely caused by the stamping process and the die itself, but are mainly caused by traditional stamping equipment and backward manual operations.

In the stamping production process of the metal stamping factory, our dies have life after repeated processing losses, so what are the main factors affecting the life of the die?

Second, the main factors affecting the life of the die

1. Forming: During the use of the stamping die convex and concave die, the shape deformation occurs, which changes the geometric shape of the processed product parts, thereby affecting the dimensional accuracy and shape requirements of the processed parts. This situation is just the opposite of the fracture situation, mainly because the quenching hardness of the convex and concave dies is not enough during heat treatment, or because the quenching hardness layer is too shallow, the convex and concave dies are geometrically deformed when they are stressed.

2. Broken: The convex and concave die are suddenly damaged, broken, and cracked during use. Since the die is the part of the die that is subjected to high die pressure during the punching operation, the die protrusion will break during the punching process. The main reason is: improper heat treatment (the quenched hard layer is too deep), such as If the design gap is too small, it will cause the mold to bulge and the die to be damaged, broken and broken. Punch and concave dies are broken, and some are partially damaged, which can be used after repairing, while some are damaged to a large extent or cannot be repaired.

3. Wear: The die is raised, and the wear caused by frequent friction between the die and the processing material for a long time. Therefore, the long-term friction between the convex and concave dies between the materials to be processed results in a large number of and long-term punching, so that the burr of the punched parts is too large (the gap is too large), and the gap between the convex and concave dies is too small. The main reason for the wear of convex and concave molds. For example, the convex and concave die edges become blunt, and the edges and corners become gardens.

4. Bite: The gap between the convex and concave dies is unevenly adjusted and assembled, and the adjacent edges of the convex and concave dies bite each other, resulting in gnawing on the edges of the convex and concave dies. If the position of the convex and concave dies is deviated during assembly, the gap is not uniform, and when the unguided die is installed, the gap between the convex and concave dies is not adjusted properly, causing bulges and the concave dies to bite and damage each other.

The above is the relevant content of metal stamping mold processing. Due to the guarantee of the mold in the metal stamping process, the size and shape of the metal stamping parts can reach the effect of micron precision, and in many cases, the surface quality of the stamping parts will not be damaged, so that the characteristics of the metal stamping parts become stable and interchangeable. Hope the above content 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 are the technical requirements for common automotive stamping die processing?

1. Characteristics of vehicle stamping parts

1. Since the high-speed cutting lathe is controlled by a microcomputer program, a central processing unit is required to process a large amount of data quickly. It has high-capacity storage structure, high-speed data transmission and network transmission capability, error compensation, measurement error compensation function, symbol error compensation, thermal error compensation.

2. The transmission system requires large feed speed and acceleration, generally 20-30 meters per minute and 20-40 meters per second.

3. The main road of the airport. Because in the process of high-speed cutting, the mold needs to be milled at a very high speed, and the speed of the spindle must be synchronized with it. Generally speaking, it needs to be adjusted between 10,000-100,000 per minute, with fast acceleration and accurate shutdown. Therefore, hydrostatic pressure, air static pressure, suspended magnetic levitation, etc. Generally used for the arrangement of lathe bearings.

4. The machining of automobile stamping dies is carried out with milling cutters, and the hardness and wear resistance of the tools are tested by thousands of turning millings. Therefore, the tool material must choose cemented carbide, polycrystalline diamond, etc. At the same time, the positioning of the tool must be accurate, and the error should be controlled within 0.001mm.

There are many factors affecting the quality of automobile stamping parts, and the influence of die layout on stamping die is often small. The influence of the die radius, die event geometry, die guide method, drawing rib (slot) setting, die pore size and other factors on the forming effect of the drawn part.

2. Determination of punch and die fillet radius

The radius of the convex and concave die is an important factor in obtaining an ideal deep-drawn part. Wrinkling and tearing are the two main defects of covered tensile parts. If the punching radius is too small: the bending deformation of the straight wall and the bottom of the billet increases, and the strength of the dangerous section is weakened.

When the radius of the die is too large, the tensile stress of the side wall of the blank increases accordingly. Both will increase the tensile coefficient and deformation resistance of the sheet, resulting in an increase in the total pull-out force and a shortened die life.

If the punching or die radius is too large, the deformation force of the sheet is small, and the metal flow resistance is small, but it will reduce the effective area of ​​blanking and make the parts easy to wrinkle. Therefore, when determining the punch radius, the deformation characteristics of the workpiece and the drawing rib should be considered.

3. The geometric figure part of the model

The shape of each part of the die is different, which also affects the quality of the deep drawn part. There are two types: flat head dies and tapered dies. The use of tapered dies generally makes the deformed area of ​​the blank more resistant to instability, compared to flat-end dies (t/D). The smaller it is, the less wrinkled it is.

Fourth, the mode-guided model.

The wire drawing die consists of a punch, a blank holder, a blank holder and a blank holder. The rationality of the mold track is directly related to the reliability of the pull-out work. Reasonable and stable guide rails can ensure the uniformity of the gap around the mold and the coordination of the drawing surface, thereby ensuring the quality of the drawn parts.

The above is the relevant content of automobile stamping die processing. The proportion of mold material and heat treatment is about 70%, which has become the main factor affecting the service life of the mold. Therefore, in the whole process of mold design and manufacture, it is very important to choose the correct mold material and heat treatment process. Hope the above will be helpful to readers.

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.

How to deal with the rust prevention of stamping and drawing parts?

Stamping and tensioning is a commonly used part in drawing and is widely used in many industries. Stamping and drawing parts should be treated with rust prevention during the production process to effectively avoid corrosion during use. Let’s take a look at the anti-corrosion treatment method of stamping and drawing parts. What is the effect of multiple stretches?

1. Apply asphalt paint and preheat the stamping and drawing parts before spraying, which can improve the adhesion of asphalt paint and accelerate drying.

2. Coating a special coating in the cement mortar can improve the corrosion resistance of the lining of the punching piece.

3. Epoxy coal tar coating is a two-component coating with high adhesion and smooth surface.

4. Epoxy porcelain lining is a kind of anti-corrosion coating for stamping parts. Due to the difficulty of production and high cost, the use has certain restrictions, and it has high adhesion and smoothness.

5. Aluminate cement coating or salt cement coating, two kinds of special cement coatings are suitable for the anticorrosion of punching and pulling parts, and can improve the corrosion resistance.

6. Polyurethane coating is a new type of green special coating with good wear resistance and corrosion resistance.

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 factors need to be considered in mold design in drawing mold processing?

The opening size also plays a non-negligible role in the production test of the entire mold. Therefore, in most cases, when designing irregular deep-drawn parts, a cavity is often left for deep-drawn part design.

1. Stretch material.

If the customer is not strict with the material requirements, and the repeated test model does not meet the requirements, you can replace the material with good tensile properties and try again. Good material is half the battle, and stretching cannot be ignored. The cold-rolled steel plate is mainly 08Al.08.08F.10.15.20 steel, and the amount used is 08 steel, which is divided into boiling steel and stable steel. The price of boiling steel is low and the surface quality is good, but the deviation is serious, and the phenomenon of strain aging is prone to occur. The foreign steel grade adopts Japanese SPCC-SD deep drawing steel, and its tensile properties are better than 08Al.

Second, the surface processing 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.

3. Determine the blank size.

The more wrinkled the die, the less the crack is our principle. High positioning accuracy and high precision. Under the same stretching conditions, when the rotating body is pulled out, the thickness of the blank will change, but its thickness is basically the same as the original thickness. According to the same principle, the blank area and the drawn area (if needed to adjust, trim the allowance). But wire drawing is more complex in shape and process, and sometimes becomes thinner. Now, there is a lot of software for 3D that can extend the calculation of materials.

Answer: Test data.

A product needs to go through several processes, usually one process is blanking. Through the calculation of the unfolded material, the shape and size of the blank have been fully understood, and the overall size of the droplet mold has been determined. After the mold design is completed, the convexity and concavity of the mold cannot be processed. The blank is first machined by wire cutting. If the blank is relatively large, it can be milled with a milling cutter and then clamped), and then the size of the blank is determined by repeated tests of the subsequent wire drawing process, and then the die punch is processed.

The above is the relevant content of mold design in drawing mold processing. Friendly advice. If the trial die is cracked, try applying lubricant (rapeseed oil, soapy water) to the lower die, or covering the die compound with a film wrap to get results. Proper antipyretic process can improve the plasticity of the material and reduce the multiple stretching of the parts. Hope the above will help readers.

What are the influences of the design structure of the stamping die on safety?

Main components, functions and safety requirements of the mold. The convex and concave molds in the workshop generally refer to the working parts that directly shape the blank, because they are the key parts in the mold. The convex and concave die are not only precise and complex. It also needs to meet the following […]