Metal stamping die design skills: general cutting edge first, blunt guide is, prognosis, play bumps, tear, and the piercing blanking, after pressure burrs, forming, bending in two steps, first half, another half after forming.
When punching blanking, the general first blunt holes, after blunt macroporous: first blunt completion form around the waste, and fell more than other parts of the material: for if rushed holes on the back, then it when cutting, punch around corresponding material to bring the parts may have gap, in this way, punch in the stamping process, will cause uneven, originally small hole punch strength is very weak, and uneven, very easy to break, of course, it is only in most cases, sometimes need according to actual condition, hole rushed can row behind, but there's something coming, if the thickness of the punch is too small, but the reinforcement: A: the take off board precision guidance;
B: punch with PG processing.
Determine whether to adopt cutting edge: cutting edge usually used in continuous mode and blanking die, its effect on the coarse positioning, when the test is easy to feed;
Some cutting edge also have a function of blunt shape, if the mould first blunt positioning pinhole, then use guided needle guide is immediately, general need not cutting edge;
No guide pin, cutting edge, used to distance, commonly used in wool embryo blanking die.
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