具有当代水平的BOK60、BOK63和B3等牌号的黑色矿物陶瓷、对硬度不低于HRC45的淬硬钢和各种铸铁零件的精加工和半精加工来说,是生产率最高的刀具材料。在余量不大、载荷均匀(如扩孔钻和铰刀)条件下工作的刀具上安装陶瓷刀片是提高劳动生产率的重要潜力,但刀片的精确装夹有一定的困难。本文介绍的直径50mm,装有三角形刀片的扩孔钻可解决这一问题,并可作为直径40～100mm刀具的基础。 Black mineral ceramics with contemporary grades such as BOK60, BOK63 and B3 are the most productive tool materials for the finishing and semi-finishing of hardened steels up to HRC 45 and various cast iron parts. Inserting a ceramic blade on a tool that operates at a low margin and uniform load (such as a reamer and a reamer) is an important potential for increased labor productivity, but the precise clamping of the blade has some difficulties. This article describes the diameter of 50mm, with triangular inserts reaming drill to solve this problem, and can be used as the basis of the tool diameter 40 ~ 100mm.