What is the reason for the high scrap rate of automobile stamping parts?

2019-12-27 15:33:19

Many stamping factories often have high scrap rate when they are stamping. When the scrap rate is high, it not only causes the increase of production cost but also does not conform to the concept of energy conservation and environmental protection. Now the competition in stamping industry is so fierce, and the profit has been greatly compressed. If the scrap rate remains high, a batch of orders may not only have no profit but also lose money. So it is very important to solve the problem of high scrap rate of stamping parts. To solve this problem, the home page should know what causes the high scrap rate? Only in this way can we solve the problem. So what is the reason for the high scrap rate of automobile stamping parts?

1、 The raw material quality of steel plate is not up to standard.

Raw materials are a guarantee to process qualified stamping parts. If the hardness and surface of raw materials do not meet the quality requirements, the scrap rate of corresponding stamping parts will be too high. Especially for some stamping parts with large deformation, if the raw materials are unqualified, they will crack, damage and other phenomena. Therefore, when purchasing raw materials, we must not be greedy for cheapness. We must find reliable regular material suppliers.

2、 The installation of stamping die is unqualified.

The installation of the stamping die does not conform to the specification, which results in the poor cooperation between the upper die and the lower die during the stamping process, resulting in high rejection rate. Stamping die is the basis of processing stamping parts. On the premise of ensuring that the die has no problems, installation is very important. Don't think it's easy to install stamping die, even small error may lead to the production of stamping parts is scrap. When installing the stamping die, the concentricity, clearance and flatness of the upper and lower dies play an important role.

3、 The mold is worn.

In the long-term use of automobile stamping die, there are wear or loose parts, which will also lead to product scrap. There are many stamping factories, after the installation of the mold for production, they do not carry out daily inspection and maintenance of the mold at all. Only when the burr is relatively large, they remove the mold and simply grind the knife edge. As we all know, the wear of die is not only the wear of knife edge, but also the wear of some die parts. After the wear of these parts, the accuracy of the whole die will be affected.

4、 The operation of workers is not standard.

The worker did not operate the punch according to the installation manual, or there was an error in feeding.

5、 The positioning device is not accurate.

In the process of feeding, the inaccurate mold positioning device will cause problems in the coordination of each process and waste products.

As each kind of stamping parts need different stamping dies, all, the specific reasons are analyzed. When the scrap rate of stamping parts is too high, it is advisable to find out the reasons from these five aspects.