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RESEARCH PAPERS

Tool Life in Oblique Cutting as a Function of Computed Flank Contact Temperature

[+] Author and Article Information
P. K. Venuvinod

Department of Manufacturing Engineering, City Polytechnic of Hong Kong, Hong Kong

W. S. Lau

Department of Manufacturing Engineering, Hong Kong Polytechnic, Hong Kong

C. Rubenstein

Department of Mechanical Engineering, Ben Gurion University of the Negev, Beer Sheva, Israel

J. Eng. Ind 112(4), 307-312 (Nov 01, 1990) (6 pages) doi:10.1115/1.2899592 History: Received August 01, 1987; Revised November 01, 1989; Online April 08, 2008

Abstract

The steps by which a tool life analysis applicable to orthogonal cutting can be extended to accommodate tool obliquity are detailed. By following these, a relation between tool-life, T , tool obliquity, λ , and a representative tool flank wear land contact temperature, θ fs , is obtained. A method is then described by which θ fs in oblique cutting can be computed. This is based on a recently developed procedure for estimating temperatures of obliquely moving heat sources on the rake face combined with the influence of constriction resistance occurring at the discrete contact points within the flank contact area. In this way, from a knowledge of the T − θ fs relation applicable to a given tool/workpiece combination cut orthogonally, tool lives at different tool obliquities are predicted and are shown to agree quite well with experimentally determined values. Finally, a comprehensive tool life expression independent of cutting parameters and of tool geometry is proposed and is verified using data obtained by cutting mild steel with H.S.S. tools.

Copyright © 1990 by The American Society of Mechanical Engineers
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