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我们曾遇到要加工如图1所示的零件,内孔直径d为二级精度,因此内孔冲成型时需留一定加工余量。同时,30°内圆锥面成型时亦需放0.5mm加工余量,故工件毛坯总厚度为3mm。而该零件选用材料是2mm厚的电工钢,这个厚度就不能满足该零件所要求的尺寸了。同时,该零件还要求在A处圆周部份无塌角现象。鉴于要达到以上的技术要求,必须对该零件的冲挤压工艺进行仔细地分析,主要是考虑30°内圆锥成型面的材料从何处来?经过分析,我们设想在冲零件
We have encountered to be processed as shown in Figure 1 parts, bore diameter d for the second level of precision, so the hole punch molding to leave a certain allowance. At the same time, 30 ° inner cone surface also need to put 0.5mm machining allowance, so the total thickness of the workpiece blank 3mm. The choice of materials is 2mm thick electrical steel, the thickness can not meet the requirements of the size of the parts. At the same time, the part also requires no part of the circle in the A Department of the phenomenon of collapse. In view of the above technical requirements to be met, the part of the extrusion process must be carefully analyzed, mainly to consider the material inside the 30 ° cone forming surface come from? After analysis, we assume that the red parts