Orthogonal Experimental Study on Two Side-direction Burrs of Grind-hardening Workpiece Based on Transverse Feed

Abstract

Based on the orthogonal experiment, the influences of grinding depth (ap), the workpiece feeding rate (vw) and the transverse regrinding value (Cr) on two side-direction burr of 40Cr steel large-plane grind-hardening workpiece were investigated. The results show that, under the coupling of heat and force in the grind-hardening process, the surface metal of the workpiece metal flows toward the unconstrained direction on both sides, resulting in the formation of the burr. The grinding depth and the workpiece feeding rate become leading factors affecting the size of the burr. Moreover, the significance of three factors to the size of the burrs is as follows: the grinding depth (ap) > the workpiece feeding rate (vw) > the transverse regrinding value (Cr). The result showed that the maximum size of the first-pass and the second-pass burr would increase with the increasing of the grinding depth and the transverse regrinding value in grind-hardening processes, but it decreases with the workpiece feeding rate. The optimal process parameters are ap=0.1mm, vw=0.8m/min, and Cr=1mm under the experiment conditions.