Glue, scratch, due to the conflict of information, perhaps the punch or die mold is bad parts, flash: first impact shear modulus and blanking die, edge and the gap between big or hours will produce burrs, shift: stamping, the first part in contact with the mould be knead into a line, methods: the foreign body uncoiling line (
IRO）
N, rubber, dust)
Mix with convex concave, bending.
Due to the uneven, brace or lever control is bad, bad cooperation Angle of parts
stamping parts in embossed parts bending or injury may occur.
Ruffle: layering improper adjustment, low precision press, air cushion or improper pressure adjustment, punch R due to reasons such as could lead to a big edge or R.
Other specific issues: in the daily production, will meet the cutting size is too big or too small (
May exceed standards)
And cutting size and the scene is different, in addition to punch forming, blanking planning elements such as size, machining accuracy and blanking clearance, also should consider the following aspects need to be processed.
When cutting edge wear, increase the tensile stress on the data, stamping parts easy to flip deformation.
When material flip, stamping size decreased.
Stress can lead to data on the data of plastic deformation, resulting in larger size stamping.
When pressure is reduced, the size of the hole will be smaller.
The shape on the punch edges.
For example, at the end of the ramp or circular arc, slow due to the impact, the impact is not easy to flip material, cause deformation, thus make the stamping scale.
When cutting end of plane (
No cant or arc)
When the cutting size is relatively small.
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