Due to the different shapes and specifications of products in stamping and stretching dies, different stamping is essential, and the stretching process is one of them. In specific, drawing processing production, some problems are prone to occur, which affect the quality of products and processing production efficiency. For specific questions, please refer to the following points.

1. The damage of the mold cavity will cause the inner diameter of the stretched part to be slightly larger

2. If the ejection force is too large, the inner diameter will be slightly larger; if the ejection force is insufficient, the inner diameter of the stretcher will be too small

3. If the stretched material is too thin, the inner diameter of the stretched part will be slightly larger; too thick, the inner diameter will be too small

4. The temperature of the hydraulic oil used for deep drawing is too high or the oil leaks will cause the inner diameter of the drawn part to be too small

5. There are more wrinkles at the mouth of the stretcher

6. The stretcher has bruises

7. The stretch die design has bumps and bruises in appearance

1. The inner diameter of stamping and drawing parts is small.

A. When the pop-up force is insufficient.

B. Hydraulic oil temperature is too high or hydraulic oil is leaking.

C. The stretch material is too thick.

2. The inner diameter of the stretched piece is slightly larger.

A. The ejection force is too large.

B. Destruction of the stretch cavity.

C. The thickness of the stretched material is too thin.