The characteristics of the shell deep drawing parts

The deep drawing of the shell is to deepen the sheet into a cylindrical bottle-shaped part; in the drawing operation, the diameter of the blank is affected by the perimeter of the shell, and the perimeter is affected by the fluidity of the stamping material and the outer material inward Flow resistance and edge resistance; when the resistance of the edge material exceeds the limit, the edge will wrinkle and become unstable. In order to avoid wrinkles, it is necessary that the stamping material can flow smoothly between the punch and the blank holder. The two main reasons for deep drawing cracks are that the ratio of the diameter of the drawn part to the diameter of the blank exceeds the limit value and the drawing radius; when drawing a flat blank into a shell and drawing the shell into a smaller diameter shell There is a limit value for the inward flow distance of the material, which is usually called the drawing coefficient. The limiting drawing coefficient is affected by factors such as the fluidity of the stamping material, the compressive resistance of the material, and the flow resistance caused by pressure. Excessive flow resistance causes the edge of the shell to break and wrinkle. This area is the area with the weakest material resistance; Recommended article: Stamping parts processing factory talk about the three views of stamping dies Previous: The principle of chrome plating of cold metal stamping parts