Causes And Prevention Methods Of Cracks in Stamping Parts

Causes and prevention methods of cracks in stamping parts
1. Common causes of cracks in stamping parts
Material problem
The hardness of the material is too high or uneven, and there are defects such as pores and inclusions in the material, which can easily cause cracks in stamping parts.
Improper stamping process
In the stamping process, if there are problems in the adjustment of the punch machine, mold design, mold manufacturing and other links, it will cause cracks in the stamped parts.
Over stamping
When the friction or pressure between the mold and the material is too large, it is easy to deform the material and form cracks.
Cracks caused by changes in environmental conditions
For example, during the stamping process, materials generate heat through friction. When the material is rapidly cooled, thermal stress is easily generated due to different cooling rates in different parts, leading to cracks.
2. Methods to prevent cracks in stamping parts
Choose the right material
Materials that are uniform, free of inclusions, pores and other defects can effectively reduce the probability of cracks in stamped parts.
Properly designed mold
Reasonable mold design can reduce material displacement, reduce stress during stamping, and shorten stamping time.
Check the adjustment of the punch press
In the stamping process, the height, speed, pressure and other parameters of the punch need to be adjusted reasonably to ensure that the entire stamping process is smooth and stable.
Control the stamping process
During the entire stamping process, control the temperature and stay away from inappropriate environments, such as excessive relative humidity.
Step by step stamping
Step-by-step stamping can reduce stress concentration, reduce the speed of material displacement, and reduce the probability of cracks.