During the production process of metal stamping and drawing parts, it is inevitable to encounter various product quality issues, and burrs are one of them, which mostly occur in the blanking process of stamping parts processing. Since the reasons for the generation of burrs vary, and stamping parts manufacturers need to solve the problems according to the specific causes. We can first understand what types of burrs there are in stamping parts so that we can analyze and solve them and control the burrs within the allowable range.

There is a fracture on the sheared surface, and there is a double-layered section with relatively large burrs. The reason is that the die clearance is smaller than the reasonable clearance, and the cracks at the edges of the punch and the die do not coincide. This can be solved by grinding and adjusting the clearance between the punch and the die. The section of the blanked part has a large inclination, a torn burr is generated, and the fillet at the arc area expands. The reason is that the clearance of the blanking die is too large, resulting in the non-coincidence of the cracks. This can be solved by replacing the new working parts of the die.

The burrs of the punched parts are large, and the fillet of the blanked part expands. The reason is that the edge of the die is dull. This can be solved by grinding the edge of the die. Burrs are generated on the blanked parts, and large fillets are generated on the punched parts. The reason is that the edge of the punch is dull. This can be solved by grinding the edge of the punch.

Burrs and large fillets are generated on the blanked and punched parts of metal stamping and drawing parts. The reason is that the edges of the blanking punch and the die are dull. This can be solved by grinding the edges of the punch and the die.