Reduction of diffraction effect in the diamond cutting by tool feed control

Abstract

Ultraprecision aspherical cutting process using a single-crystal diamond tool is widely used in the manufacturing process of the optical components. Recently a linear motor driven ultraprecision machine was developed, and the pick feed of the tool became extremely correct. Therefore regularity of the surface roughness became very highly precise, and a diffraction effect often remains in the surface roughness and as a post process, polishing process using loose abrasives is inevitable. Therefore in this study, a random number is applied to the feed rate of NC program, and the reduction of the diffraction effect in the diamond cutting by the tool feed control is tested and its effects are reported.