Fundamentals of Machining Processes, 3rd Edition

9

Abrasive Finishing Processes

9.1   INTRODUCTION

The geometric characteristics of machined surfaces affect their wear resistance. In this regard, large surface macro-irregularities result in nonuniform wear, with the projecting peaks of the surface worn off first. In the case of surface waviness, the crests wear down first as the friction and specific pressure will be higher at these than for uniform bearing surfaces of mating parts. Microsurface irregularities are subjected to elastic deformation and crushing or shearing during contact with other sliding surfaces. The valleys between the ridges of a machined surface may be the focus of concentrated internal stresses; these may lead to failure of the machined parts. In case of assembly, the ...