The quality of the finished products in the stamping factory will lay a reliable foundation for the appearance and performance of the vehicle. Therefore, the quality assurance of stamped parts has always been a very important issue for automobile manufacturing enterprises. . Then the analysis of the causes of tearing caused by stamping small hardware accessories customized automobile hardware stamping parts?

The common tear and skewed form of metal stamping parts is the stamping process of the middle protective bracket: blanking punching - punching incision - flanging forming - incision- -Flanging. There are various forms of tearing and skewing during the forming process of the intermediate protective bracket. The tearing parts are mainly distributed in the hole shape of the workpiece, the junction of the R arc and the wall neck at the corner of the side wall, etc., due to stamping forming and production. Due to the difference in process conditions, the proportion of each fracture site is different. The tear can be a one-time forming tear or a tear due to the development of fatigue cracks, i.e. invisible cracks.

Cause analysis, according to the actual situation of the site, by checking the tearing part, fracture shape and crushing degree of the part, it is believed that the tearing and skewing behavior of the part is mainly reflected in the overturning. Edge forming process, the reasons for this process phenomenon are as follows:

The forming process parameters are not in place. During the forming process of the part, the process requires that the die, the pressing core and the two parts must be closely attached together. When the slider slides down, the plastic deformation of the sheet is pressed to achieve forming. However, due to the shortcomings of unstable quality of the pressed parts, it means that the pressure of the machine tool is in an unbalanced state of pressure beating during the production process.

The main reason is that the processing technicians did not adjust the pressure of the machine tool in time at this stage according to the specified requirements of the process, or did not communicate with each other at the handover of each shift. Communication of machine tool pressure stability information leads to unstable parts quality.

The design defect of the flanging forming mold, the mold is shared by the left/right parts of one mold and two cavities. Because the content of this process is not only flanging, but also the content of shape forming. The parts are particularly complex, the curved surface is narrow, and the forming requires that the die pressing material core is in line with the forming surface, etc., resulting in a large forming stroke and a small pressing area of the mold structure. When designing the mold, the designers only considered the feature of the small binder surface, but ignored the forming guide sliding stroke of the binder core.