The stamping process of auto parts generally includes four processes: drawing process, trimming process, punching process and flanging process. Each process corresponds to a set of molds. Sometimes, in order to save costs, a set of molds for the subsequent trimming and punching process is made and compressed into three-process molding. The drawing process is the main forming process. Through the drawing process, the main shape of the part is basically formed. In addition, the part after drawing and forming is strengthened by deformation, and a certain strength and rigidity can be obtained.
The trimming process is mainly to remove the redundant accessories in the drawing process, such as drawing beads, process supplementary surfaces, etc. The punching process, as the name suggests, is to punch the holes on the parts. For some complex door inner panel molds, the punching process may need to punch more than 100 holes, which requires high precision and is difficult to process. The flanging process is mainly to turn up the edges around the part for use in the later edging process or subsequent assembly.
The stamping process of major automobile companies is basically similar, but the stamping technology of different materials is different. At present, under the background of lightweight automobiles, aluminum bodies are used by more and more car companies. Due to the difference in the properties of aluminum and steel materials, aluminum bodies have certain technical difficulties in stamping and forming, and automobile mold manufacturing also requires Do different surface treatments.
As a mature material forming process, automotive stamping process is widely used in the automotive industry and has made great contributions to the development of the automotive industry.
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