両センタ支持円筒研削面の2山成分とその除去研削法

抄録

Two-lobe components or two-point lobings on cross-sectional profiles frequently dominate out-ofroundness of cylindrical workpieces ground by using two dead centers. The present paper deals with these components and a new grindng method to eliminate them. It is shown that two-lobe components are observed as two-cycle-per-revolution runouts of ground surfaces when measured just after grinding from the workpiece table as a datum plane. This fact suggests that two-lobed profiles may result from workpiece rotation errors of twocycle-per-revolution. In the proposed method, the workpiece runouts are corrected by oscillating the wheelhead position precisely by using a special system with a microcomputer and a stepping motor. It is found that, by this method, the two-lobe components and the out-of-roundness of workpieces can be reduced to about one half of the values in conventional methods.