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我厂产品中,直径40～80mm,长度1m左右的轴类较多,由于轴的直径大于车床主轴内锥孔直径,无法将轴伸入锥孔内,所以在车床上打中心孔较困难。故往往在Z 3040×16摇臂钻床上加工中心孔。但因钻床下料,端面不垂直于轴线,在斜面上钻中心孔不容易打正。我们采用了如附图所示衬套夹具钻中心孔的方法,效果很好。对不同直径的轴,选用相适应的衬套,犹如使用不同规格的板牙一样。衬套上有
I plant products, the diameter of 40 ~ 80mm, the length of about 1m axis more, because the diameter of the shaft is larger than the diameter of the taper hole in the lathe spindle, the shaft can not extend into the taper hole, so the center hole in the lathe is more difficult. It is often in the Z 3040 × 16 radial drilling machine center hole. However, due to the drilling machine, the end surface is not perpendicular to the axis, the center hole in the bevel drilling is not easy to hit the positive. We used the method of drilling the center hole of the bush fixture as shown in the drawing, and the effect is very good. For different diameter shaft, choose the appropriate bush, as if using different specifications of the same die. Bushing there