Stamping mold

Stamping mold is a special process equipment that processes materials into parts (or semi-finished products) in stamping processing.


Classification based on process properties: punching dies, bending dies, drawing dies, forming dies, etc. Classification based on the degree of process combination: single process mold, composite mold, and progressive mold.

The three elements of stamping production: reasonable stamping process, advanced molds, and efficient stamping equipment.


  1. Blanking, punching, and trimming


Defects: excessive burrs, deformation, surface scratches, size discrepancies, missing holes, etc


1) Excessive burrs: the gap between the convex and concave molds is too large or too small; Blade wear; Poor guidance accuracy; The positions of the convex and concave molds are not concentric, etc. 2) Deformation: The hole spacing is too small; Poor fit between the pressing plate and the concave model surface; Excessive clearance, etc. 3) Surface scratches: there are dragging, pulling and other phenomena during operation; Scratches, etc. during the shearing process of the sheet metal. 4) Size mismatch: inadequate feeding; Damaged or loose positioning device, position shifting, etc. 5) Less holes: the punch is broken; Insufficient punch length, etc.


  1. Drawing


  1. Flanging


Defects: uneven flanging, inconsistent flanging height, rough flanging, cracked flanging, etc.


1) The flanging is not vertical: the gap between the convex and concave molds is too large. 2) Inconsistent flanging height: uneven gap between convex and concave molds; Inaccurate positioning; The size of the dropped parts is not accurate. 3) Flanging and roughening: There are scars on the blade edge; Impurities on the surface of the parts; The hardness of the cutting edge is too low. 4) Flanging crack: large burrs during trimming; The gap between the convex and concave molds is too small; There is a sudden change in the shape of the flange.


  1. Bending


Defects: Unqualified bending angle, cracked bending edge, steps at the bend R corner, etc.


1) Unqualified bending angle: The gap between the convex and concave molds is too large, and the matching angle between the convex and concave molds does not match. The thickness of the plate material is different. 2) Broken bending edge: The gap between the convex and concave molds is too small; The bending angle is too small; Excessive punching force and fast speed; The board material is slightly hard. 3) Bending R angle with steps: the bending angle of the convex and concave molds is too large; Excessive external R angle; The bending force is too small.


  1. Scrap jumping hole


1) If the length of the punch is not enough, replace the punch by cutting into the concave mold with a material thickness of 1mm according to the punch edge;


2) If the gap between the concave molds is too large, cut in the sub to reduce the gap or use a covering machine to reduce the gap;


3) If the punch or template is not demagnetized, use a demagnetizer to demagnetize the punch or template.

  1. Waste blockage
  2. Poor appearance

1) The edge of the blade collapses, causing the blade to become too large and regrind the blade;


2) The gap between the punch and the concave die is too large, and the wire is cut into the block, and the gap is reset;


3) Poor smoothness of the concave die blade, polishing the straight wall position of the blade;


4) The gap between the punch and the concave mold is too small, so the mold needs to be saved and the gap needs to be adjusted;


5) If the top material force is too large, pull out the front cover in reverse and replace the spring to reduce the top material force.


Post time: 2023-11-08 14:42:48
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