直流接触器上的法兰盘(图1),材料10钢冷轧钢板,厚度2.5mm,是我厂一种批量较大的半成品零件。工艺过程是:1.冲孔落料,2.翻边,3.按图冷镦成形不再加工。过去冷镦模是采用反装复合式冷镦(图2),由于该零件经冷镦后的变形,以及型腔间产生的摩擦力,以致脱料困难。另外,项4凸凹模空心凸台壁薄强度差等原因,使用过程中往往凸台被镦坏,生产效率很低。为此,我们设计制造了一副台阶形冷 DC contactor on the flange (Figure 1), material 10 steel cold-rolled steel, thickness 2.5mm, I plant a large volume of semi-finished parts. Process is: 1. Punching blanking, 2. Flanging, 3. Press Figure cold heading forming no longer processing. In the past, the cold heading die was used in cold heading (Figure 2). Due to the deformation of the part after cold heading and the friction between the cavities, it was difficult to remove the material. In addition, Item 4 concave and convex cavity hollow bosses poor thin strength and other reasons, the use of the boss is often upsetting, production efficiency is very low. To this end, we designed and manufactured a step-shaped cold