How to prevent chip jumping of stamping parts

Chip skipping of stamping parts refers to the phenomenon that the scraps in the edge of the die are brought out of the die surface by the punch when the precision metal die is blanking at high speed. Its existence will crush the strip or stamping parts, thus affecting product quality, shortening die life and reducing production efficiency. It is a “big taboo” in high-speed continuous blanking production.
The main causes of chip jumping are as follows
In the process of high-speed continuous blanking of precision metal mold, there are many factors, such as cutting oil, excessive clearance and so on, which make the instantaneous local vacuum formed between the punch and the scrap. When the material is very thin, and the sum of the weight of the scrap and the friction force of the die edge is less than the adsorption force of the punch, the scrap will be adsorbed on the surface of the punch during the rising process of the punch, and then rise, thus forming a jump die It’s a chip. There are many factors that affect chip skipping. When the punch edge is worn, the amount of cutting oil is too much, the material is very thin, and the punch depth into the die is too short, etc., chip skipping can be caused.
Methods to prevent chip jumping:
Reduce the blanking clearance of precision hardware mold, punch processing abnormity, knife edge processing anti slot, suction and blowing device, batch cover knife edge, reduce or replace cutting oil, etc.