我厂有时要制造一些管形的工件,这些工件的材料多半是铜的,可以用套料刀加工;但因数量不多,制造套料刀就很不上算,因此只好用钻头加工,材料浪费很大。后来施工具强泉生同志改进了一把割刀,同样可以套料,经实际使用证明,效果良好。这种割刀特别适用于加工数量不多的少量生产。套料割刀的几何形状如图1所示:前角为18°,后 Sometimes our factory to make some tubular workpieces, most of these parts of the material is copper, you can use sets of knife processing; but because of the small number of manufacturing sets of knife is not on the operator, so had to use bit processing, materials Wasting a lot. Later, with the construction of strong health comrades improved a knife, the same nesting material, the actual use of that effect is good. This knife is particularly suitable for processing a small number of small quantities of production. The geometry of the nesting knife is shown in Figure 1: The rake angle is 18 °, after