Why does the stamping hardware produce tearing phenomenon-hardware

The common tearing and skewing forms of stamping hardware are due to the stamping process of the middle protective surface bracket: blanking and punching-punching cut-flanging forming-cut-flanging. There are various forms of tearing and skew during the forming process of the middle protective surface bracket. Most of the tearing parts are distributed in the hole pattern of the workpiece, and the R arc at the corner of the side wall and the junction of the wall neck, etc., due to stamping and production The difference in process conditions, the proportion of each fractured part is different. The tear can be a one-time forming tear or a tear caused by the development of fatigue cracks, that is, invisible cracks. Analysis of the cause, according to the actual situation on the site, by inspecting the tearing position, fracture shape and degree of crushing of the part, it is believed that the tearing and skewing behavior of the part is mainly reflected in the flanging forming process. The reasons for this process are as follows: The forming process parameters are not executed properly. During the forming of the part, the process requires that the die, the blanking core and the two parts need to be closely attached together, and the sheet material is forced to plastically deform when the machine tool slides down to achieve forming. However, due to the shortcomings of the pressed parts such as unstable quality, it shows that the pressure of the machine tool is in a state of unbalanced pressure fluctuation 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 in accordance with the requirements of the process designation, or did not communicate the machine pressure stability information with each other during the handover of each shift, resulting in poor quality of the parts. stable. The design defect of the flanging forming mold. The mold is shared by the left and right parts of a two-cavity mold. In addition to the flanging, the content of this process also has the shape forming content. In addition, the parts are particularly complex and the curved surface is narrow. The matching of the core and the forming surface results in a large forming stroke of the mold structure and a small pressing area. When designing the mold at the beginning, the designer only considered the feature of small blanking surface, but neglected the guiding slide stroke of blanking core. Hardware, 15 years of ingenuity focused on stamping hardware, 20000+ sets of stamping hardware mold customization and production experience, product accuracy can reach 0.01MM, 5000 square meters of factory area, daily production capacity of 3 million punching times. Choose, choose to rest assured!