On the Superfinishing of the Convex Surface with Newly Developed MPR Stones

Abstract

The experiments have been carried out in order to examine if it is possible to super -finish the whole convex surface smooth with newly developed MPR stones without changing the profile of the convex surface. MPR stones consist of abrasive particles, copper powders sustaining abrasive particles and synthetic rubber as a bonding material. The results are as follows: The convex surface can be finished smooth with an MPR stone No.1 without changing the profile of the convex surface if the height at the center of the convex surface is less than 13.8μ in case of 11 mm in width, and with an MPR stone No.2 if the height is less than 11.9μ. These values become larger as the surface irregularities of the abrasive stone become larger.