CBN CUTTING TOOL MANUFACTURING METHOD AND CBN CUTTING TOOL

摘要

Provided are: a cBN cutting tool manufacturing method, which is capable of significantly improving the precision of the center height of a cBN cutting tool that has a sintered compact of cBN on the corner(s) of the base metal and which can also make the angle of inclination and width of the negative land(s) to be sufficiently small; and a cBN cutting tool. While holding the cBN cutting tool by clamping the base metal of the tool with the chuck of a grinder that is able to control position and orientation, a flank and a rake face formed on the cBN sintered compact are ground by pressing the cBN sintered compact on the end face of the grindstone of the grinder. Said grinding is performed so that the object of the grinding is substantially the cBN sintered compact. Additionally, in the grinding of the rake face, the rake face of the cBN sintered compact is recessed from the upper surface of the base metal or only the cBN sintered compact protruding from the base metal rake face is ground. The method is configured so that said work is executed without releasing the clamping of the tool by the chuck.