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用钻头代替铰刀精加工孔是我厂何甫根同志改进的,我们会利用这种方法加工过可锻铸铁(КЧ35-10)的汽车后桥壳上的孔径,钢板弹簧吊耳的孔径,手制动前后臂(45钢的锻件)的孔径等等,都达到的光洁度。用一般钻头加工孔径,如果不经过铰、镗、拉等工序,要想达到二级、三级精度是很困难的,这主要有以下几个原因。 1.顶角(2ф)磨得太大时轴线上受力大,
Drill instead of reamer finishing hole is improved by my factory comrades He Fugen, we will use this method has been processed malleable cast iron (КЧ35-10) the rear axle housing aperture, leaf spring lifting lug aperture, handmade Move the front and rear arm (45 steel forgings) aperture, etc., have reached the finish. With ordinary drill hole diameter, if not through the hinge, boring, pulling and other processes, in order to achieve two, three precision is very difficult, mainly for the following reasons. 1 vertex angle (2ф) when the grinding force is too large axis force,