Section characteristics of metal parts stamping

1、 Fillet band. The fillet band, also known as the collapse angle, is caused by the bending and stretching of the material surface near the upper die or lower die but not in contact with the stamping die.

 

2、 Bright zone. The bright band is caused by the plastic shear deformation caused by the upper die cutting into the steel plate and the material being squeezed into the lower mold. The bright band is the area with good section quality of stamping parts, which is smooth and vertical to the steel plate plane. Precision stamping is generally the pursuit of bright band.

 

3、 Fault zone. The surface of the fracture zone is rough and has an inclination of about 5 degrees, which is caused by the crack propagation formed during stamping.

 

4、 Burr. The burr is close to the edge of the fracture zone, and the crack is not directly facing the die edge, but on the side near the edge of the stamping die. It will be aggravated when the stamping parts are pushed out of the die by the lower die.

 

A good section of hardware stamping parts should first control the burr, minimize the burr, and then pursue the bright band. For many hardware stamping parts that require more precision, customers will put forward the proportion of bright band in the whole section. Of course, this is the scope of precision stamping.