Abstract
In the burnishing process, the effects of some kinds of fluids are investigated on the working forces and the surface quality as well as the anti-adhesive property, to clarify the working mechanism of fluids. The experiment is performed by forcing the hard ball through an undersized hole, hereafter this procedure is called ballizing in this paper. In order to evaluate the lubricating effects of fluids, the penetrating forces are measured by means of strain gauges. The effects on the work are studied from the micro vickers hardness in the cross section, surface roughness and plastic flow of surface layer, etc. The results are as follows : 1) In the ballizing, the viscosity of fluids, not the EP lubricants, has the most influence on the working forces. The increasing of the viscosity causes the increasing of the forces. 2) Surface roughness is much improved in application of the fluid having the higher viscosity rather than the lower. 3) In the ballizing, the workpieces are most work hardened at a few micro meters distant from the inner surface. And its work hardening is greater in use of the fluid having the high viscosity rather than the low viscosity.
