CUTTING DEVICE, PROCESSING DEVICE, FORMING DIE, OPTICAL ELEMENT, AND CUTTING METHOD

摘要

In a cutting tool (23), a shank (23b) is a support member made of ceramics and is hard to bend even though it is light in weight. Also, a processing chip (23c) is a diamond chip having a cutting edge and is fixed to the tip of the shank (23b) by the active metal method, brazing, etc. The shank (23b) is pressed and fixed by a fixing screw (25) and a washer (27) to the lower surface of a slit-like groove (21f) provided in a fixation section (21a). In this case, the washer (27) is an annular member deforming as a cushion member and prevents localized concentration of stress by fastening of the fixation screw (25).