When most metal stamping factories process stamping parts, the rejection rate is often too high. Now the competition in the stamping industry is very fierce, and profits have been severely compressed. If the scrap rate remains high, there may not only be no profit after a batch of orders are completed, but also money may be lost. It is particularly important to solve the problem of high scrap rate of metal stamping parts. Heju Precision Editor gives you some ideas or can help you.
1. The quality of raw materials is not good enough
Raw materials are the first guarantee for processing qualified stamping parts. If the hardness and surface of the raw materials do not meet the quality requirements, the corresponding stamping parts scrap rate will definitely be too high. Especially for some stamping parts with relatively large deformation, if the raw material is unqualified, cracks and breakage will occur. Therefore, when purchasing raw materials, you must not be greedy for cheap, and you must find a reliable and regular material supplier.
2. Unqualified installation of stamping die
The installation of the stamping die is not in compliance with the specification, which leads to the inability of the upper die and the lower die to cooperate well during the stamping process, resulting in a high rejection rate. Stamping dies are the basis for processing stamping parts. Installation is very important on the premise that there is no problem with the dies. Don't think that it is easy to install the stamping die, even a small error may cause the stamping parts produced to be scraps. When installing the stamping die, the concentricity, clearance, flatness, etc. of the upper and lower dies all play a vital role.
3. Mold wear
In the long-term use of the stamping die, wear or loose fittings will also cause the product to be scrapped. There are many stamping factories that do not perform routine inspection and maintenance of the mold after the mold is installed for production. Only when the burr is relatively large, the mold is removed and the knife is simply sharpened. As everyone knows, the wear of the mold is not only the wear of the knife edge, but also some mold parts will wear with use. After these parts are worn, it will affect the accuracy of the entire mold.
4. Irregular operation of workers
Workers did not follow the installation manual when operating the press, or there was an error in feeding.
5. The positioning device is not accurate
In the feeding process, the mold positioning device is inaccurate, which will cause problems in the coordination of each process, and will also lead to waste products.
Since the stamping die required for each metal stamping part is different, there are specific reasons for specific analysis. When the scrap rate of stamping parts is too high, you might as well look for the reasons from these aspects first. Pay more attention to Heju Precision and share more stamping knowledge.
