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TECHNICAL PAPERS

Energy Partition to the Workpiece for Grinding with Aluminum Oxide and CBN Abrasive Wheels

[+] Author and Article Information
S. Kohli, C. Guo, S. Malkin

Department of Mechanical Engineering, University of Massachusetts, Amherst, MA 01003

J. Eng. Ind 117(2), 160-168 (May 01, 1995) (9 pages) doi:10.1115/1.2803290 History: Received January 01, 1993; Revised March 01, 1994; Online January 17, 2008

Abstract

An experimental investigation is reported of the energy partition to the workpiece for grinding of steels with aluminum oxide and cubic boron nitride (CBN) abrasive wheels. The energy input to the workpiece was obtained by measuring the temperature distribution in the workpiece using an embedded thermocouple technique and matching the results with analytically computed values. It was found that 60-75 percent of the grinding energy is transported to the workpiece as heat with an aluminum oxide abrasive wheel, as compared to only about 20 percent with CBN wheels. An analysis of the results indicates that the much lower energy partition to the workpiece with CBN can be attributed to its very high thermal conductivity whereby a significant portion of the grinding heat is transported to the abrasive instead of to the workpiece. The much lower energy partition to the workpiece with CBN wheels results in much lower grinding temperatures and a greatly reduced tendency for thermal damage to the workpiece.

Copyright © 1995 by The American Society of Mechanical Engineers
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