Cause of stainless steel wrinkling: When the metal flows inward through the stretch ring in a radial manner, the compression force generated may cause wrinkles, and the fixture will prevent such wrinkles. If the metal flow is uneven or there is no support of the stretching ring, wrinkles will begin to occur. Thin materials need more fixing force than thick materials.
How to control the fixing force during stainless steel stamping?
The fixing force of stamping parts can be controlled in many ways. First, use a flat surface fixing pad. When metal flows under the fixing pad, the pressure will increase. If the fixing pad is designed at a slight angle, the fixing force will increase. In this way, the stamping will be more regular, but the stamping parts outside the stretch ring may wrinkle. If the flange will be cut in the future, you can not worry about this problem. The purpose of this design is to effectively control the metal flow into the stretching ring.
Second, a punch ball can be added to the fixed pad, and a corresponding groove can be added below to further prevent the metal from flowing inward.
The above measures are taken to make the side wall wait for more tension when necessary. Although there are ready-made parameters for reference of the fixed force, it is usually necessary to obtain the correct fixed force through repeated tests.
