Surface quality of products after high speed precision punching

Material quality requirements for stamping using high speed presses, including the following
1. The surface of the material must be smooth and flat, without scratches, without pores and shrinkage holes.
2. There is no delamination of the material section, and there is no obvious mechanical damage.
3. There is no rust on the surface of the material, no oxide scale and other attachments. In the high-speed stamping process, materials with good surface quality can obtain smooth surfaces and high quality work. and it is not easy to break during the deformation process, and it is not easy to damage the mold.
In summary, the high-speed press in the stamping process, the requirements of the surface of the product is still relatively high.
If the material of high-speed precision punching is metal coil material, there are certain regulations and requirements for the surface quality of the material. For example, high-quality carbon structural steel sheets, the standard not only specifies three types of stretching, but also divides into different fine surfaces according to their surface quality.
Generally, the requirements of the stamping process for the material to be processed are: dimensional accuracy of the material, surface quality, and stamping processability.
1. Material dimensional accuracy:
Mainly refers to the thickness tolerance of the material. The thickness tolerance of the stamped coil must be controlled within a certain range, because the thickness of the material is often an important basic parameter when designing the stamping die. If the material thickness fluctuates too much during actual production, it may cause a sharp increase in the processing force or the workpiece may be broken. The stamping process may not proceed smoothly, and the mold or the high-speed precision punch may be damaged. Therefore, the material thickness tolerance must be controlled by inspection.
2. Surface state of the material:
The surface state of the material being processed also affects the die life and forming limit of the stamping process. The surface of the stamped material is usually required to be free from damage, defects, and oxidation. Rather, the surface roughness of the sheet also affects the forming of the drawing process, so it is necessary to select a suitable material according to different requirements.
3. Stamping processability of materials:
The stamping processability of the material means that the material must be only suitable for stamping.