総型研削における砥石摩耗

Abstract

In form grinding, wheel wear is given rise to public discussion in finished accuracy of workpiece. So, to make clear of the mechanism of wear phenomena at the vicinity of grinding wheel's sharpedge in V-groove grinding, the present paper describes the influence of grinding conditions upon wheel wear. Cylindrical high-speed steel (SKH-9) is traverse ground with the V-shape trued wheel. Groove-width and -edgeangle are little changed through the grinding process, but groove-depth is changed, caused by wheel wear. Then, decreased amount of groove-depth is selected as the parameter of wheel wear. The relation between the grinding conditions and wheel wear is investigated experimentally. The following results are clarified.(1) In V-groove grinding, wheel wear is consisted of initial wear and stationary wear process. The initial wear is caused by great fracture and releasing of abrasive grain, and stationary wear is caused by small fracture and attrition wear.(2) There is a close connection between a grain size and wheel edgeangle concerning with wheel wear. Wheel wear is minimized at the case of which suitable grain size is used at a certain wheel edgeangle.(3) The lower the workspeed and the smaller the cutting depth, the smaller the wheel wear.