1501 Development of Small High Accuracy Lathe with Ceramic Body

Abstract

In this study, the design and production of a desk-top-type lathe were carried out, and the cutting performance at high-speed condition is investigated. The size of the developed lathe is 200×300×230mm, and the weight is 28kg. This machine tool was composed of an air turbine spindle (150,000min^<-1> type), a silicon nitride based ceramic frame and a linear motor drive stage with 0.1μm positioning accuracy. As a result of high-speed turning of soft magnetic material, a surface roughness of 0.9μmRz without tear parts was obtained at cutting speed of 31m/sec .