我厂生产的电风扇零件中,法兰盘(图1)材质为铸铝合金,由于φ7.8~(0.58)6孔与外圆φ18和φ65端面分别有同轴度和垂直度要求,为了保证其位置度精度,必须将零件在车床上一次装夹加工这三个部位,加工φ7.8孔采用钻铰工艺,铝屑不能及时排出,孔壁遭到拉伤,孔腔轴线歪斜,喇叭口严重,影响了产品质量,生产效率也不高,而 I fan parts factory production, flange (Figure 1) made of cast aluminum alloy, as φ7.8 ~ (0.58) 6 holes and cylindrical φ18 and φ65 end face, respectively, coaxiality and perpendicularity requirements, in order to To ensure the accuracy of its position, the parts must be machined in the lathe machining of these three parts, processing φ7.8 hole using the drilling hinge technology, aluminum can not be discharged in time, the hole wall was injured, bore axis skew, horn Seriously affected the product quality, production efficiency is not high,