What are the common problems of metal automobile stamping parts?

2022-08-22 09:34:27

The common problem of the die in production is that the die always breaks the punch. There are many reasons for breaking the punch. Generally, the thickness of the raw material is relatively thick, and the punch is relatively weak, so it is easy to break the punch. The punch reinforcement problem needs to be paid special attention to when opening the die of stainless steel products. If the material thickness is relatively thick, it is not recommended to punch in the blanking die. Because the blanking force of the die is too large, the punch is also easy to break, The early review of each product is very important when the customer requires mold opening. The relevant technical personnel shall be convened to communicate according to the experience of each person to avoid repeated mold repair after the mold is developed.

The processing of metal automobile stamping parts is a widely used processing method. In the process of metal stamping, it involves deep drawing, trimming, punching, flanging, opening and other processes. It is very complicated to create some problems. What are the common problems of metal stamping parts?

1. Burr mainly occurs in the shearing die and blanking die, and burr will occur in the gap between the large or small cutting edge.

2. Adhesion and scratch on the surface of metal stamping parts or dies due to friction between materials and punches or dies.

3. Convex and concave, with foreign matters (iron scraps, rubber and dust) mixed into the uncoiling line.

4. If the blanking size is too large or too small, the difference between punch size and punch size is large.

5. When the workpiece is formed, the extrusion is in contact with the die and forms a line.

6. Twist, due to uneven stress, poor matching of drawing ribs or poor control of the press slider, the R angle of the part or the corner and strain of the embossed part are caused by twists and turns.

7. The strong pressure of the metal stamping parts on the material and the plastic deformation of the material will cause the size of the punching hole to increase, and when the strong pressure is reduced, the size of the punching hole will be smaller.