Regal—Beloit 公司新发展了一种“Unipass”钻头“N”丝锥的复台刀具,这种刀具可在一次行程内完成两道工序,从而可用一个工位来代替二个或两个以上的多工位设备。该复合刀具的特点是,钻头的横刃经过修磨,钻尖角为118°,不需采用中心钻定心,即可进行钻削。刀具上作有一条螺旋槽,横刃经过修磨的钻头和丝锥前后排列,其螺旋角为25°,因此,钻头和丝锥部分切削配合得合理。该组合刀具适 Regal-Beloit Inc. has developed a new “Unipass” bit “N” tap compound tool that can perform two operations in a single pass to replace two or more Station equipment. The feature of this compound cutter is that the chisel of the drill bit is sharpened and the angle of the drill is 118 °. Drilling can be performed without centering the center. There is a spiral groove on the tool. The chisel edge is arranged before and after the sharpened drill bit and tap, and the helix angle is 25 °. Therefore, the bit and tap part are cut and matched reasonably. The combination of tools suitable