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Four factors affecting the service life of cold stamping dies

update:14-03-2020
abstract:

In recent years, China's cold stamping die products hav […]

In recent years, China's cold stamping die products have been continuously expanded in terms of application scope. From the perspective of market conditions, China's cold stamping dies have made great progress in terms of quality, technical capabilities, and quantity. Compared with the world's advanced level, the gap is still very large, which is mainly reflected in the short service life of the cold stamping die. The reasons for this affect the form and reasons of the cold stamping die's service life. The most important are fractures, deformations, wear and tears.
The following is the specific situation:

fracture:During the use of cold stamping dies, the sudden damage, breakage and cracking of the convex and concave dies during use. Since the convex and concave dies of the mold are the parts of the mold that are subjected to punching pressure, the convex and concave dies of the mold will break during the stamping process. The main reason is that the heat treatment is not handled properly (hardened or hardened) The layer is too deep), too small design clearance, etc. will cause the mold convex, die damage, breakage and fracture. The breakage of the convex and concave molds of the mold is partially damaged, and we can continue to use it after repairing, and some are more severely broken or completely damaged and cannot be repaired. You have to configure a new convex mold or Use after die.

Deformation:The shape of the convex and concave dies of the cold stamping mold has been deformed during use, which changes the geometric shape of the processed product parts, which further affects the dimensional accuracy and shape requirements of the processed parts. This is exactly the opposite of the fracture situation, mainly due to the insufficient hardness of the quenching hardness of the male and female die or the shallow hardness layer during the heat treatment process, which caused the geometric deformation of the male and female die during the stress process.

Abrasion:The cold and stamping molds are frequently rubbed with each other for a long time between the convex and concave dies and the material being processed, resulting in wear. Due to the long-term friction between the convex and concave dies and the material being processed, large-scale long-time blanking parts, excessive burrs (large gaps), and small convex and concave gaps, etc. An important reason for the wear of the convex and concave blades. Such as convex and concave blades become blunt, edges and corners become round, and so on.

Sting:The cold and stamping molds are uneven in the adjustment of the gap between the convex and concave dies, and the adjacent edges of the convex and concave dies bite each other, causing nicks in the edges of the convex and concave dies. For example, during the mold assembly process, the positions of the convex and concave dies are shifted, and the gaps are uneven. When a mold without a guide is installed, the adjustment of the clearance between the convex and concave dies is not suitable, and the convex and concave dies bite and damage each other.