Experimental research of features of surface treatment using plastic deformation

Abstract

This study is devoted to the processing of external cylindrical surfaces by surface plastic deformation. The slip-page of tapered rollers during rolling of cylindrical samples made of steel 35 and 45 has been studied. A diagram is presented for determining the slippage during treatment by surface plastic deformation, as well as a section of a diagram chart with signal recording. It is according to this section that the pulses from current collectors in contact with roller surfaces and workpieces assigned to a specific recording length have been counted. The depth of penetration of the deforming roller into the workpiece and its effect on the roughness of the treated surface have been determined. The results of experimental studies are presented as graphs of dependence of slippage change on self-feed and penetration angles, of roughness on deformation rate as well on penetration and self-feed angle. It has been shown that the deformation force remains practically unchanged at self-feed angles ranging from 0 to 3 degrees. Therefore, a decrease in surface roughness of the treated samples can be explained by the presence of slippage of the contacting surfaces of the rolled workpiece and the deforming roller. It has also been found that if one installs a tapered roller with a smaller base in the feed direction, the roughness is slightly reduced, compared to installing the same deforming element with the same base in the direction opposite to the feed.