Evaluation of the Effects of Design Variables on Drill Temperature Responses

[+] Author and Article Information
M. F. DeVries

Department of Mechanical Engineering, The University of Wisconsin, Madison, Wis.

S. M. Wu

Department of Mechanical Engineering and Department of Statistics, The University of Wisconsin, Madison, Wis.

J. Eng. Ind 92(3), 699-705 (Aug 01, 1970) (7 pages) doi:10.1115/1.3427833 History: Received December 18, 1969; Online July 15, 2010


The effect of five design and three operating variables on three different drill temperature responses is investigated. A total of 512 observations was made using a replicated two-level factorial design. Problems associated with the selection of the temperature responses are studied including the transient nature of the response, the location of the thermocouple, and the interrelationship of the workpiece volume and drill wear. The five drill design variables are web thickness at point, margin width, relative lip height, helix angle, and surface condition, of which the helix angle and web thickness at point had the most significance within the experimental range. The effect of two-factor interactions was also discussed.

Copyright © 1970 by ASME
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