Handling Of Common And Specific Problems in Production

In daily production, the punching size is too large or too small (possibly exceeding the specification requirements) and the size of the punch is quite different from that of the punch. In addition to considering the design size, processing accuracy and blanking clearance of the forming punch and die, the following aspects should also be considered.
(1) When the cutting edge is worn, the tensile stress of the material increases, and the tendency of turning over and twisting of the stamping parts increases. When material turnover occurs, the punching size will be smaller.
(2) The strong pressure on the material will cause plastic deformation of the material, which will lead to larger punching size. When the strong pressure is reduced, the punching size will be smaller.
(3) . Shape of punch edge end. If the end is trimmed with an inclined plane or arc, the punching part is not easy to turn over and twist due to the slow cutting force, so the punching size will become larger. When the punch end is flat (no inclined plane or arc), the punching size will be relatively small.
In specific production practice, specific analysis should be made for specific problems to find solutions.
The above mainly introduces the causes and solutions of the turnover and distortion of the punched parts during blanking.