Ultra high Speed Grinding of Optical Glass using Beryllium Core Diamond Wheel

Abstract

Ultra high speed grinding has been attracting attention as a processing method for improving the productivity and for quality on the surface of work. Present study focuses on grinding characteristics of an optical glass under high speed region. Grinding has been carried out using NC grinding machine with a magnetic bearing and also new type grinding wheels have been made in which metal beryllium is used as the core of wheel. Three kinds of wheel have been produced. Experiments are conducted under the conditions ranging from conventional grinding speed to 12000 m/min. It is found that grinding mode varies with increasing the revolution speed of wheel from conventional to ultra high speed one. Ductile mode appearance on the surface ground under the ultra high speed can be seen in which traverse grinding is made using a metal bond wheel.