Custom Stamping Die
Household appliances, car bodies, connectors, and other products are all manufactured using customized stamping molds, which require the use of high-precision metal molds. The structure of stamping dies consists of fixed plates and discharge plate components, which have high strength and toughness performance.
Stamping Tooling Design Fundamental
There are many methods for stamping tooling design, and some small problems may occur when manufacturing stamping die. If there is a problem, it needs to be resolved promptly. Each problem has a corresponding method for custom stamping die. The design of magnesium stamping die design includes the stamping process, deep drawing process, bending process, and forming process.
Debugging Methods for Stamping Tooling Design
Technicians should ensure the quality of workpieces and improve manufacturing efficiency during the inspection of production stamping tooling design, while reducing the auxiliary repair time of precision stamping tooling design, lowering downtime, and minimizing material waste as much as possible. The main debugging contents of the stamping die method include the following points.
- For the lubrication parts in the production of deep drawing and stamping tooling design, technicians should proficiently master the oiling skills. There should be no metal or non-metal adhesion on deep drawing and stamping tooling design, burrs, scratches, convex and concave molds. If there is any adhesion, the operator should clean it promptly.
- Use a temporary method of adding diagonal pads to solve the problem of burrs due to large gaps.
- When the deep drawing and stamping die cracks and wrinkles, the adjustment time should not exceed 18 minutes. If the time exceeds, technicians should select new materials and readjust the pressure test. For loose fastening parts, use tools with you to tighten them.
- When the cutting edge of the equipment becomes blunt, it needs to be repaired with a grinder and a grinding stone. If the parts are severely damaged, they should be replaced promptly.
- For each link of adjustment and repair in the process of producing precision stamping tooling design, the stamping tooling design can be produced only after the technicians ensure that the parts meet the requirements. The operator should make records after each inspection to facilitate the next inspection. If it is found that a component needs to be repaired and improved, timely markings should be made on the component for easy repair or transitional parts should be left.
Reference to Machine Precision Parameters in Adjusting Stamping Tooling Design
The precision requirement of the equipment is that in the stamping production of precision stamping tooling design, the press is one of the main equipment used, and it plays a great role. The equipment bears manufacturing power and significant impact force, not only ensuring the normal installation of metal stamping tooling design but also ensuring that the molds meet standard requirements. One of the necessary conditions for producing qualified stamping tooling design is the accuracy of the equipment, which also ensures the quality and service life of the metal stamping tooling design. There are many aspects to the accuracy of a machine, mainly including the parallelism of the workbench facing the sliding lower plane, the flatness of the sliding lower plane, the flatness of the equipment table, the verticality of the slider stroke to the equipment table, and the distance between the slider guide rail and the bed guide rail.
The equipment accuracy of metal stamping tooling design plays a crucial role in the process of cold stamping production of workpieces. If the accuracy of the stamping equipment is higher, the quality of the stamped mold will also be better and better. The size of the stamping die is stable, with less adjustment assistance time to avoid damage to the stamping die. If the stamping die is used for a long time, it helps with continuous automated manufacturing, avoids material waste, reduces downtime, and greatly improves manufacturing efficiency.
If the accuracy of the stamping machine is too low, there may be a large gap between the slider and the bed. In the manufacturing of automotive stamping tooling design, the coaxiality of the upper and lower molds is reduced, causing damage to the cutting edges of the stamping tooling design. The reason for the accelerated wear of the stamping tooling design is the generation of burrs on the parts, which may reduce the dimensional accuracy of the parts and result in long production downtime.
The state of the slider and the worktable must be perpendicular, otherwise the axis of the upper and lower molds cannot be coaxial, resulting in damage to the punching edge. The consequence is that the local gap size is different, which may cause the quality of the stamping mold to not meet the standard requirements, resulting in material waste, increased wear and damage speed of the stamping mold, reduced usage time of the stamping mold, and hindered normal production. The accuracy of stamping equipment is the guarantee for manufacturing workpieces. If there is an unstable quality of automotive stamping tooling design, it is necessary to check the accuracy of the equipment.
Because the mold is made of steel and produced according to requirements, there will be no special circumstances that will cause problems. Unless there is a change in the precision of the stamping equipment parameters, or a change in air pressure and the clearance between the press guide rails, resulting in some factors. When producing new stamped workpieces, the stamping die will undergo significant modifications. Before debugging, the manufacturer needs to check the accuracy of the equipment, as the accuracy of the press is very important.
Wrinkling Method for Deep Drawing of Custom Stamping Tooling Design
Solving the problem of wrinkling during stretching of automotive stamping die requires attention to many aspects, such as metal stamping mold design, customized material selection, parameter adjustment, pre-processing, and mold maintenance methods. If wrinkling occurs during the deep drawing process of stamping tooling design, there are several solutions to solve this problem.
- Check the design of precision stamping tooling design: The importantstep is to check whether the mold design meets the standards, including whether the structure, size, angle, and radius of the stamping mold meet the requirements. If it is found that the mold design does not meet the standard requirements, the technical personnel need to redesign it until the design of the stamping mold meets the requirements.
- Choose appropriate stamping die materials: The selection of precision die materials can also affect the wrinkling problem during the stretching process. The mold material selected by technicians should meet the standard requirements, and the stamping mold material should meet the characteristics of moderate strength and hardness. The material should not be too soft. If the stamping die material is too soft or too hard, it may cause wrinkling.
- Correct deep drawing parameters: The parameter settings during the deep drawing process also play a crucial role, which can also affect wrinkling issues. The main deep drawing parameters include stretching speed, stretching force, and mold temperature, all of which need to be modified correctly. To avoid wrinkling during deep drawing, adjust these parameters.
- Pre-processing: Before conducting deep drawing processing, some pre-treatment can be carried out on the stamping mold to avoid the possibility of wrinkling. Pre-treatment mainly includes polishing or sandblasting, with the main purpose of improving the surface smoothness of the workpiece.
- Strengthen the maintenance of customized stamping tooling design: Operators regularly maintain and upkeep the molds to ensure that there is no dust or dirt on the equipment, and to ensure that the molds are clean and in good condition. If the stamping die has damaged parts, technicians should repair them promptly to avoid affecting the normal use of the mold in the future.
The Rebound Factor of Stamping Tooling Design
When manufacturing automotive stamping tooling design, many factors can affect the quality of the workpiece, among which the most critical factor is rebound. The reason for the rebound phenomenon in the bending deformation process of precision stamping tooling design. When plastic bending is performed on materials, elastic deformation occurs. When the bent workpiece is removed from the equipment, the pure elastic deformation near the neutral layer is caused by the recovery of the elastic deformation part in the total deformation of the inner and outer areas, resulting in a change in the shape and size of the bent part that is opposite to the deformation direction during loading. This change is called rebound.
Due to the different requirements of the workpiece, the rebound amount of the workpiece also varies. The materials and technical processes used in bending forming stamping tooling design are different, and the complexity of the shape is also different. Some shapes have relatively simple requirements, while others have relatively complex requirements. The main factors affecting the rebound of stamping tooling design are as follows.
- The gap between the convex and concave molds can also play a certain role. The smaller the gap between the convex and concave molds of the bending stamping die, the higher the degree of material adhesion. The smaller the plastic deformation of the bending stamping die, the greater the rebound of the part after unloading.
- The complexity of the shape of precision stamping tooling design can have a certain impact on deformation. The more complex the shape of the workpiece, the greater the mutual constraint effect of deformation during bending deformation. Increasing the bending resistance during manufacturing reduces the compressive deformation component in the inner area of the sheet metal, thereby reducing the spring back of bending forming.
- The mechanical properties of materials, the magnitude of rebound, and the yield strength of materials are closely related. If the yield strength of the material is higher, the amount of rebound will increase.
- The relative bending radius reflects the degree of deformation of the material of the stamping die during bending. Due to the varying degrees of deformation, the proportion of elastic bending deformation in the total bending deformation is constantly changing. When the relative bending radius decreases, the rebound amount also decreases accordingly.
- The main methods of material bending and forming include free bending without a bottom die and correction bending with a bottom die. The two methods are different, and the difference between them is that the rebound amount is different. The springback of the parts formed by the bottomless die is relatively large, while the spring back of parts formed by the bottomed die is relatively small.
To solve the problem of rebound in manufacturing, the main methods to reduce and avoid rebound are:
- Adjustment M To reduce the rebound amount, the corners of the customized stamping die are changed in shape. When the bending deformation is completed, the punch force will concentrate on the bending deformation zone, causing the inner layer of metal to be squeezed and produce tangential elongation strain.
- Design of Workpieces. The material of precision stamping tooling design will affect the rebound amount. Technicians select standard materials and make appropriate adjustments to the design of the parts. To reduce rebound, avoid using materials with higher strength. If the material is hard, an annealing treatment can be used. The method to improve the rigidity of parts is to add reinforcement ribs in the deformation zone of the workpiece to achieve a uniform distribution of material forces.
- Compensation Law. It is generally divided into two situations: single-angle bending and double-angle bending. If it is a single-angle bending, the fillet radius and top angle of the convex mold should be made smaller in advance. If it is a double-angle bending, make rebound angles on both sides of the convex mold or create a circular arc at the bottom of the mold to compensate for corner rebound.
When encountering problems with precision stamping tooling design, timely find the correct method to solve the problem. In the manufacturing field of precision metal stamping tooling design, stamping tooling design is used to shape or transform metal materials into more complex components. Stamping technology has extremely high precision and efficiency, which is conducive to achieving large-scale production and ensuring high quality of workpieces.
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