As a complete mold design process, although the emphasis is on three-dimensional solid modeling, it is nothing more than the following design process: drawing 15, design method drawing 15, and process scheme. This product is an automobile panel. After drawing, the shape of the parts is complex, and the surface quality and the trimming accuracy of the circumference are required to be high. The trimming die should be suitable for mass production, with reliable positioning, stable product quality and simple operation. The reason why trimming and punching are combined into one can not only reduce the working procedures, but also make the hole position accurate. In this process, the work to be completed in trimming and punching is to cut off the supplementary part of the process, trim the periphery to the required size on the product drawing, and punch 7 holes. Determining the stamping direction depends on the following aspects: firstly, the absolute and relative values of the cutting edge strength and effective thickness of punch and die should be considered; According to the function and precision requirements of parts, determine the direction of trimming and punching, control the deviation within the allowable range, and ensure and improve the usability of products; Finally, we should emphasize the positioning of the parts in the mold: it is one of the most important things in mold design to position the parts reasonably. It is not only related to whether the product quality is stable and reliable, but also directly affects whether the operator's operation is simple and convenient and the service life of the mold. Therefore, the die is safe, reliable and easy to operate by using the drawing shape of the previous process and positioning with the press.