The bending edge is not straight and the size is unstable
reason:
1. There is no line pressing or pre bending in the design process.
2. Insufficient material pressing force
3. The wear of round corners of punch and die is asymmetric or the bending force is uneven.
4. The height dimension is too small.
terms of settlement:
1. Design crimping or pre bending process.
2. Increase the pressing force.
3. The clearance between male and female dies shall be uniform and the rounded corners shall be polished.
4. The height dimension cannot be less than the minimum limit dimension.
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