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What are the frequent problems of metal drawing molds

2023-08-11

Deep drawing stamping is a special stamping method. The principle is to apply external force to plates, strips, pipes and profiles by presses and molds to cause plastic deformation or separation, so as to obtain the desired shape and size. pieces (deep drawing pieces), metal stretching pieces. What are the common problems of tensile modulus?

The mold wall of the drawing part is broken, which often occurs on the side wall near the corner of the square tube and near the fillet radius (rcd) of the die. In the mold design stage, it is difficult to predict. That is, an inverted W shape, with a cross grid at 45° to the drawing direction appearing above.

Cracks appear in the corresponding parts of the punch shoulder of the metal drawing part. Due to the insufficient strength of the material, this defect occurs when the drawing load reaches the breaking load of the material. The defective part is generated at the corresponding part of the punch shoulder R (rp), that is, the part closer to rp than the impact line. The impact marks of the cracked part are different from other parts, so observation and inspection can be carried out to solve and eliminate the corresponding places.

The problems that often occur in stretched parts (deep drawn parts) and metal stretched parts molds: the mold wall cracking of stretched parts and metal stretched parts can be solved and eliminated in a targeted manner.

Cangzhou Zonpe Metal Products Co., Ltd.

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