CUTTING TOOL WITH CLAMPED-ON INSERTS

摘要

The invention relates to a cutting tool including a tool body (110) having a plurality of mounting recesses (112) formed on an end thereof. Each of the mounting recesses (112) has a mounting face respectively formed at the bottom thereof. The mounting face has a first threaded hole (158) formed therein. A plurality of inserts (20) are each respectively disposed on the mounting face (114) and secured under pressure onto the mounting face by means of a clamping screw (30) screwed into the first threaded hole (158). The cutting tool is characterized in having a plurality of reduced hardness regions respectively formed under the mounting face inside the tool body (110), each of the reduced hardness regions having the first threaded hole (158) formed therein and a hardness lower than the hardness of the tool body (110). In one embodiment, the reduced hardness regions are formed by embedding a right cylindrical column (156) into a straight hole (154) of round cross section formed under each mounting face of the tool body (110).