How to select stamping materials reasonably for the processing of metal stamping parts?
How to select stamping materials reasonably for the processing of metal stamping parts? According to many years of experience tells us: the selection of stamping parts and metal raw materials are intimately related. The difference in plasticity, hardness, and composition of the raw materials are directly related to the consequences of stamping parts. How to select suitable stamping raw materials for metal stamping parts processing? Kechuang Hardware Stamping Factory gives friends a relief:
From the perspective of stamping parts processing, the mechanical properties, surface quality and thickness of stamping materials should meet the following basic requirements:
- 1. The material used for blanking should have sufficient plasticity and low hardness to improve the quality of the blanking section and dimensional accuracy. Among them, soft materials (such as brass) have good punching performance, hard materials (such as stainless steel, high-carbon steel) have poor punching section quality, and brittle materials are prone to tearing during punching.
- 2. The material used for bending should have sufficient plasticity, low yield strength, and high elastic modulus. Among them, the material with good plasticity is not easy to bend and crack, and the material with lower yield strength and higher elastic modulus has less rebound.
- 3. The material used for stretching should have better plasticity, lower yield strength and hardness, and larger plate thickness deflection coefficient. Among them, materials with high hardness are difficult to be deep-drawn; materials with a small yield ratio or a large plate thickness deflection coefficient can be easily deep-drawn.
When metal stamping parts are processed, the error requirements for the thickness of the material are relatively strict. This is because the inevitable die gap is suitable for stamping materials of inevitable thickness. If a uniform die gap is used to stamp materials with large thickness differences, the quality and accuracy of the workpiece obtained from the hot spot will be reduced, and the die will also be easily damaged. Especially in the drawing, flanging and bending processes, because the thickness of the material is uneven, it may cause the occurrence of garbage. In the reshaping of large workpieces, the press can even be damaged.
The mechanical properties of metal materials not only depend on their chemical composition, but also on their structural layout. Generally speaking, if the structure of metal is thin, the plasticity is large, which is beneficial to the deformation of the material during stamping. However, if the structure of the metal is too fine, the strength and hardness of the material will increase.
Changzhou stamping parts processing is also the benefit of sponsoring the mold to repair a few shortcomings. Is it hot? Why use mold inserts for molds?
Diligence and frugality information: The material of the rear mold is determined by a very high point. If it is just a relatively regular height, this piece can be set up so that the material can be set at a low point.
Bento processing: Among the processing equipment, the speed is very slow and the accuracy is very poor is EDM, so occasionally, in order to prevent EDM processing, it will be selected as inserts.
Bento exhaust: Especially for a little deep bone, poor drainage of EDM processing, poor exhaust during molding, and inserts are often required at this time.
Ensuring accuracy: The grinder is a high-precision machine, accidentally, in order to ensure the accuracy, so that when the grinder is processed.
Interchange requirements: Occasionally, customers request to unify a product, such as changing the label position, to make interchangeable inserts.
Bento and mold saving: Some deep orientations, but the mold saving is not enough, so it is made into inserts.
Convenient mold modification: Some orientations are easy to wear or require too high precision. For the consideration of mold modification, inserts are made.
Heat dissipation considerations: This mainly refers to beryllium copper inserts.
Increase the application life of the mold: Under normal circumstances, where the stamping mold needs to design the insert, it is often the place that is easily damaged. Once the insert is damaged, it can be replaced, thereby extending the application life of the mold.
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