Influence of Flank Wear on the Stresses in a Cutting Tool

[+] Author and Article Information
H. Chandrasekaran

Mechanical Engineering, Department of Mechanical Engineering, Indian Institute of Technology, Madras, India

R. Nagarajan

Department of Mechanical Engineering, Indian Institute of Technology, Madras, India

J. Eng. Ind 99(3), 566-577 (Aug 01, 1977) (12 pages) doi:10.1115/1.3439280 History: Received July 19, 1976; Online July 15, 2010


The present paper is devoted to the study of the influence of flank wear upon the contact and internal stresses in a single-point tool. A comprehensive model for the distribution of contact stresses along the wear land is proposed and compared with experimental results obtained from photoelastic investigations. For this purpose orthogonal machining of lead was carried out at low speed and constant depth of cut, making use of a transparent epoxy tool provided with a pre-honed wear flat along the flank surface. Wear level and rake angle seem to have influence on both the tool-chip and tool-work contact stresses in differing degrees. The elastic stress field in the tool wedge is evaluated analytically for given mixed boundary loading conditions. These results, on comparison with the experimental data obtained from photoelastic investigation and actual cutting test, indicate noticeable influence of wear level upon contact stress redistribution and stress field reorientation. Based on this, the role of flank wear upon the brittle strength of the tool is clarified.

Copyright © 1977 by ASME
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