RESEARCH PAPERS: Papers on Production Engineering

Tool Fracture Probability of Cutting Tools Under Different Exiting Conditions

[+] Author and Article Information
Y. M. Lee

Kyung-Pook National University, Daegu, Korea

W. S. Sampath, M. C. Shaw

Dept. of Mechanical Engineering, Arizona State University, Tempe, Ariz.

J. Eng. Ind 106(2), 168-170 (May 01, 1984) (3 pages) doi:10.1115/1.3185928 History: Received October 31, 1983; Online July 30, 2009


A large number (150) tungsten carbide (6 weight percent) cutting edges were used to make single cuts in AISI 4340 steel (HB = 235 kg/mm2 ) at a cutting speed of 200 fpm (61 m/min) and a variety of feeds and entrance and exit angles of workpiece taper. A map is presented showing types of brittle tool fracture occurring at exit for a wide range of feeds and exit angles. Fractures were of two types: 1) those due to very sudden unloading of the tool at exit, and 2) those due to metal adhering strongly to the tool face following a cut. Reasons for the two types of exit failure are briefly discussed.

Copyright © 1984 by ASME
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