Abstract
On the constant infeed honing, its cutting mechanism and influence of operating conditions on finishing performance are investigated. Moreover, applicability of the evaluating value di, presented in the previous paper to express the severity of operating conditions, is examined. The results are as follows. In this honing operation, three typical cutting characteristics are observed as the operating condition becomes severe : that is, glazing type, transition type and breaking type of cutting edges. In the transition type, cutting characteristic changes from glazing to breaking at a stage in process of operation. As compared with the constant pressure honing, the workpiece is hardly machined like a barrel in shape, even in the case of a large over-run. di is found to be much ful for the effects of infeed rate and cutting speed, but a little for crosshatch angle. The surface roughness of finished workpiece can be improved by applying spark-out, but there is naturally a limit of improvement. As the peaks of roughness are cut by spark-out, the surface profile is similar to that of the plateau honing. And, spectrum analysis of the roughness makes it clear that the roughness is composed of many waves of which wave length is various but amplitude is approximately equal.
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