Wear Difference between Left and Right Flank Faces in Turning Large Pitch Thread

• 1、School of Mechanical and Power Engineering,Harbin University of Science and Technology, Harbin 150080

Abstract：When axial layer turning is used to process large pitch thread, it causes the wear of left and right flank faces to be different and decreases the surface quality and consistent of thread. For revealing their difference and causes, firstly, force analyzing of left and right cutting edge is established to explain the difference between the mechanical conditions of the wear of left and right flank faces. Furthermore, the experiment of dry turning external thread whose pitch is 16mm, is done to research the variation characteristics of wear patterns and widths of left and right flank faces. In addition, drawing distribution curve show the difference of the wear of left and right flank surface. The results show that the difference of tool-workpiece contact relation make mechanical conditions of the wear of left and right flank faces different. In the same parameters, the wear patterns, the wear width, and the wear distribution of left and right flank faces are different, in addition, changing the cutting stroke cannot decrease the difference effectively.

Keywords： cutting-tool engineering large pitch thread axial stratified turning flank surface wear difference