0 Introduction The part shown in Figure 1 is a bearing housing part of a foreign-funded enterprise. Bearing shells are generally produced by casting or die-casting methods first, and then they can be formed by roughing and finishing of multi-process machine tools. The technical level of the person b is high, so the cost is high. At present, 2mm thick 08F steel plate is used, and the cold stamping method is used to make the parts meet the requirements of use, which greatly reduces the weight of the parts, improves the productivity, reduces the cost, and achieves good economic benefits. The following is an analysis of the stamping processability of the stamping parts and the structure of the mold used with the part diagram in Figure 1. 1 Stamping process analysis The part generally belongs to the inner hole flange part. Because the flange part has some shallow deep drawing, the estimated depth diameter is φ90mm, the depth is 10mm and the overall flanging height is 41mm. Therefore, the punching and flanging process cannot meet the requirements of the parts. The flanging process can meet the requirements of the parts. Further analysis of the deep drawing process shows that since the flange part has some shallow deep drawing, the drawing method of stepped parts with flanges can be used for deep drawing. semi-finished products. As shown in Figure 1, there is a rounded corner of R1mm at the bottom of the diameter cylinder, and the precision of the diameter is high, which is impossible to achieve in one deep drawing process, so a shaping process should be added after deep drawing to make the circle The diameter of the cylinder meets the requirements of dimensional accuracy and the rounded corner of the cylinder bottom R1mm, and at the same time, the flatness and verticality of the flange are corrected. The height of the part that can be turned into a part is 41mm at a time. It must be noted that due to the high dimensional accuracy of the turned over diameter, the gap between the flanging punch and the concave die should be smaller, and the dimensional accuracy of the punch should be higher. If the accuracy requirements are not met, a shaping process should be added to the diameter. Finally, the flange should be trimmed and the main holes on the flange should be punched to complete the processing of the part. Summarizing the above process analysis, seven processes are required to process the part, namely: blanking, step drawing, shaping, bottom hole punching, flanging, trimming, and punching small holes. 2. The blanking process of the die structure uses a blanking step-drawing compound die. In the step-drawing process, in order to effectively control the blank holder force, the flip-chip form of installing the elastic element under the lower die seat is adopted, and A tapered blank holder is used. The cone of the blank holder is made into the size of the shallow drawing of the part. The blank holder also acts as a punch for shallow drawing and is made of punch material, so that the blanked material In the process of deep drawing, the blank is first pressed into a dangerous shape. On the one hand, it is beneficial to further deep drawing and deformation. On the other hand, the step drawing part of the semi-finished product is formed after the deep drawing. The composite die structure is shown in Figure 2. Due to the high dimensional accuracy of the parts, and the rounded corner radius of R1mm at the bottom of the cylinder body, the lights are very demanding, so the shaping die is used to shape and level these three parts at the same time. , and its mold structure is shown in Figure 3. The bottom punching process and the flanging process use a composite die, and the head of the flanging punch adopts a large rounded shape, which is conducive to flanging forming. Its mold structure is shown in Figure 4. The process of trimming and punching small holes is also completed by a composite mold at one time. Its mold structure is more than that of the suburban horsefly. They are: blanking step deep drawing compound die, shaping die, bottom punching hole flanging compound die and trimming punching small hole compound die.