图1为变压器储油柜前盖零件图。材料为A3钢板,厚度为2mm,直径D分别为φ180、φ250、v310。由于该零件尺寸大、形状又较复杂,原加工工艺为单工序分步加工,占用设备多,生产效率低,保证质量也困难。经过改进,设计了一副液压机上使用的引伸、打筋、压印、冲孔复合模,一次冲压成形,效果较好。模具结构见图2所示。 Figure 1 is a transformer oil conservator front cover parts. The material is A3 steel, the thickness is 2mm, the diameter D is φ180, φ250, v310 respectively. Because of the large size of the part, the shape is more complicated, the original processing technology for the single-step process, occupy more equipment, low productivity, quality assurance is also difficult. After the improvement, the design of a hydraulic machine on the use of extension, a number of bars, embossing, punching composite mold, a stamping, the effect is better. Mold structure shown in Figure 2.