In the metal stamping factory, the bad reasons for the punch breakage and edge chipping during the stamping production process:
1, chip jumping, chip blockage, jamming, etc.
2. Improper feeding, cut in half.
3. The punch strength is insufficient.
4. The big and small punches are too close to each other, and the material traction causes small punches when punching.
5. The part of the punch and die is too sharp.
6. The blanking gap is too small.
7. There is no metal stamping oil or the metal stamping oil used is more volatile.
8, the blanking gap is uneven, offset, and the punch and the upper die interfere.
9. The precision of the stripping inserts is poor or worn, and the precision guiding function is lost.
10, the mold is not guided correctly and worn out.
11. Improper selection of punch and lower die material and improper hardness.
12. The material guide (pin) is worn.
13. Improper addition of the gasket caused the punch and the lower die to break.

Countermeasures for punch breakage and edge chipping:
1. Solve the problems of chip jumping, chip blockage... jamming and so on.
2. Pay attention to the feeding, trim the material belt in time, and clean the mold in time.
3. Modify the design to increase the overall strength of the punch, reduce the size of the straight edge of the lower die, pay attention to the slope of the edge of the punch edge, and cut back the small part.
4. The length of the small punch is shortened and the length of the large punch is more than one material thickness.
5, modify the design.
6, Control the machining accuracy of the punch lower die or modify the design gap, and the punching gap of small parts is appropriately enlarged.
7. Adjust the amount of oil dripping of the metal stamping oil or change the oil type.
8. Loosely check the melodious precision of each forming, and adjust or replace it to control the processing precision.
9. Training or replacement.
10. Replace the guide post and guide sleeve and pay attention to daily maintenance.
11. Change the material to use the appropriate hardness.
12. Correction, the number of gaskets is small, and the right steel gasket can be used as much as possible, and the gasket should be placed under the missing material gasket.