Laser-Forming Techniques of NPD Single-Point Cutting Tool with Sharp Edge

Abstract

A laser forming technique adaptable to forming single-point cutting tool made of nano-polycrystalline diamond (NPD) with a nose radius of 0.4 mm and sharp cutting edge was developed. It was verified through the forming test that sharp cutting edge with a roundness of less than 1.0 μm could be formed by rotating the NPD rake face to the negative Z direction of the machining center and moving the laser beam on the inclined path from the substrate to the NPD rake face when forming the flank face.