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电极是玻璃微调电容器的重要零件之一(如图1),φ1孔对外园的同心度有较高的要求,对制件合格率影响很大。原采用一般结构的冲孔模冲孔,零件的同心度在0.02～0.05mm之间浮动,无法正常生产。改在车床上用中心钻打孔,同心度能达到要求,但是操作困难,生产效率很低。根据这个零件的特点,我们设计了一付结构独特的冲孔模(如图2)经过生产实践检验,零件的同心度可以控制在0.02mm以内。从抽样计算的结果来看,
Electrode is one of the important parts of the glass trimmer capacitor (Figure 1), φ1 hole on the concentricity of the park have higher requirements, a large impact on the passing rate of the workpiece. The original structure of the punching die punching, parts of the concentricity between 0.02 ~ 0.05mm floating, can not be normal production. Drilling on the lathe center drilling holes, concentricity to meet the requirements, but the operation is difficult, the production efficiency is very low. According to the characteristics of this part, we designed a pair of unique structure of punching die (Figure 2) After the production practice test, the concentricity of parts can be controlled within 0.02mm. Judging from the result of sampling calculation,