Correlation between the Surface Quality and the Lapping Parameters in Loose Abrasive Lapping

As one of the basic finishing operations,loose abrasive lapping is widely used in the surface finishing on metallic parts,non-metallic components,and engineering ceramics.During lapping,lapping parameters have a great influence on surface quality of machined workpiece.In order to provide an experimental basis for the selection of lapping parameters,effects of some important variables such as abrasive size,lapping load,and lapping speed,on surface roughness and residual surface stress of high speed steel workpiece via loose abrasive lapping were discussed in this paper.The results show that the work surface roughness increases with the increasing of abrasives size or decreasing lapping load,and does not change obviously with the lapping speed.Lapping can cause residual compressive stress in the surface layer of lapped workpiece,and the magnitude of residual surface stress becomes larger with increasing abrasive size,lapping load,and lapping speed.