Why are precision metal stamping parts torn and skewed? 'Hardware'

Friends who make precision metal stamping parts have seen tearing, skewing, etc. of precision metal stamping parts, whether it is because of the process error or the material is inferior. In the end, why the precision metal stamping parts are torn and skewed, in order to clarify things The truth about this, the author has found a master who makes precision metal stamping parts. Let’s listen to what he said. There are many reasons for the tearing and skewing of precision metal stamping parts, mainly due to the following reasons: 1. Flanging forming mold design defects The mold is a mold with two cavities for the left and right parts, because the content of this process is except for the flanging , It also has the content of shape forming, coupled with the special complexity of the part, the narrow curved surface, and the forming requirements of the concave die pressing core and the forming surface, etc., resulting in a large forming stroke of the mold structure and a small pressing area. 2. The forming process parameters are not executed properly. During the forming of the part, the process requires that the die, the pressing core and the two parts must be tightly fitted together. When the machine tool slides down, the sheet material is plastically deformed to achieve forming. , The processing technicians did not adjust the pressure of the machine tool in time at this stage according to the requirements of the process designation, or did not communicate with each other about the pressure stability of the machine tool during the handover of each shift, which resulted in unstable product quality. 3. There is an error between the mold processing parts and the drawing design, such as clearly marking the area that needs to be processed. However, because the die core is a complex profile, the guide surface is machined after the casting is formed, resulting in a gap error after the machining surface and the guide surface of the die are slip-fitted, and the die core is left during the normal operation of the mold. Swing right. Before the part is formed, the positioning is carried out by the positioning pins and holes on the plane of the press core. This requires the press core to ensure stable, reliable and correct sliding during the forming of the part, otherwise the part will be lost during the forming. It is stable, so that the pressing core and the die wall collide and squeeze, causing the part to produce tensile stress. When the strength limit of the material is exceeded, the part is torn and skewed. The reasons for tearing and skewing of precision metal stamping parts are mainly due to the above three aspects. In addition, there are many factors that will also affect metal stamping parts. The author will not introduce them here. I want to know more. For related knowledge of precision metal stamping parts, please pay attention to this website.