Title: Study on surface finish mechanism in quick-point grinding

Authors: S.C. Xiu, G.Q. Cai, C.H. Li

Addresses: School of Mechanical Engineering and Automation, Northeastern University, Shenyang 110004, China. ' School of Mechanical Engineering and Automation, Northeastern University, Shenyang 110004, China. ' School of Mechanical Engineering, Qingdao Technological University, Qingdao 266033, China

Abstract: In quick-point grinding, the thin super abrasive grinding wheel and Computer Numerical Controlled (CNC) technology are applied and the contact zone is nearly a point between the wheel and the workpiece. Because of the point-grinding angles, the grinding model of the process is different from that of the conventional cylindrical grinding. The contact width between the wheel edge and the workpiece is not always equal to the thickness of the wheel and the effect of the plastic plough on surface integrity is enhanced due to the lower grain depth of cut. In this paper, the edge contact layer model and the parameters are presented and the formula and simulations for the edge contact width are given. Based on the experiments of the grinding steel with single grit at high speeds, the effects of the grain depth of cut and grinding speed on the plastic upheaval and the height of valley bottom on the ground surface profile are analysed. Furthermore, the formula to calculate ground surface roughness is established considering the real edge contact width and plastic plough deformation.

Keywords: contact width; materials removal rate; quick-point grinding; surface roughness; CNC grinding; superabrasive grinding wheels; surface finish mechanisms; edge contact layer modelling; simulation; grinding steel; single grit; high speed machining; grain depth of cut; grinding speed; plastic deformation; plough deformation.

DOI: 10.1504/IJCAT.2007.015255

International Journal of Computer Applications in Technology, 2007 Vol.29 No.2/3/4, pp.163 - 167

Published online: 30 Sep 2007 *

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