东风EQ140发动机油底壳如图1所示,它属于大型覆盖件,最大尺寸为850×312×160毫米,底部为复杂空间曲面,并且底部有大台阶,台阶高115毫米,是一种较复杂的典型拉延件,一般是在双动压力机(J45-630压力机)上进行拉延,原来坯料为鸭蛋形(见图2 a),需要一套专门的落料模。 1984年我厂根据市场需要开始试产。因设备条件限制,只能在单动油压机上进行拉延。我们对拉延模进行了重新设计,把原来双动拉延时的凸模上置改为下置,附 Dongfeng EQ140 engine oil pan as shown in Figure 1, it is a large cover, the maximum size of 850 × 312 × 160 mm, the bottom of the complex space surface, and the bottom of a large step, the step height of 115 mm, is a more complex Of the typical drawing parts, usually in the double-action press (J45-630 press) for drawing, the original blank duck-shaped (see Figure 2 a), requires a special blanking die. In 1984 my factory according to the needs of the market began trial production. Due to equipment constraints, only in a single hydraulic press for drawing. We have redesigned the drawing die, the original double-acting drawing when the punch to the next home, with