1. Wrinkling means that the pressure between the blank holder and the die is insufficient, and cracking means that the pressure between the blank holder and the die is too high.

1. The gap between the female die and the male die must be adjusted in place.

2. Deep drawing means that the sheet must be drawn.

3. Add lubricant when drawing, lard is the best, and rapeseed oil can also be used (not salad oil! )。

4. The pressure plate must have enough elasticity and wear resistance, preferably heat-treated plate.

5. The force acting on the pressure plate must be symmetrical! Sponge rubber is the best choice for punch, followed by spring, and the hydraulic die uses its own ejection cylinder pressure (preferably stable).

6. Be patient and calm when handling drawing dies, especially extreme drawing dies.