Wall Mirrors，Bellved Mirrors，Makeup Mirrors Qingdao Helm Import and Export Co., Ltd , http://www.chtemperedglass.com Figure 1 is a cover type component. There are three uniformly distributed elliptical holes in the side wall, which require high position and shape accuracy. According to the process characteristics of the part, the traditional process steps are as follows: first, pre-draw forming, then shaping, and finally drilling by the fitter. During the implementation of the process, it is difficult to ensure the accuracy of the shape of the three elliptical holes of the sidewall when the fitter drills, and the efficiency is low.