How to deal with the phenomenon of turning and twisting in stamping process of h

With the refinement of industrial electronics, various industries have higher and higher requirements for hardware, including hardware shape. In the process of stamping the shape of hardware, it is easy to produce the phenomenon of turning over and twisting, which will affect the product quality. In the progressive die, the metal parts can form the shape of the stamping parts by punching the remaining materials around the hardware parts. The main reason of metal parts turning over and twisting is the influence of blanking force.

 

During blanking, due to the existence of blanking clearance, the material is stretched on one side of the female die (material warps upward), and the side close to the punch is compressed. When the unloading plate is used, the unloading plate is used to compress the material to prevent the material on the die side from warping upward. At this time, the stress state of the material changes correspondingly. With the increase of the pressing force, the material near the punch side is stretched (the compression force tends to decrease), while the material on the die surface is compressed (the tensile force tends to decrease). The overturning of the hardware is caused by the stretching of the material on the die surface. Therefore, when blanking, pressing and pressing the material is the key to prevent the stamping parts from turning over and twisting.

 

1. It is caused by the burr of the blanking part. It is necessary to study the cutting edge and check whether the blanking clearance is reasonable.

 

2. When blanking, the stamping parts have been turned over and twisted, which leads to poor forming after bending, which needs to be solved from the blanking station.

 

3. It is caused by the instability of hardware during bending. Mainly for U-shaped and V-shaped bending. In order to solve this problem, the key to solve the problem is to guide the hardware before bending and during bending, and to hold down the material during bending to prevent the hardware from slipping during bending.

 

The most important reason of metal parts stamping distortion is the impact of blanking force and blanking gap is not reasonable, gap is uneven, through the above methods, can effectively solve these problems, avoid the hardware parts turnover, distortion.