Computer-assisted Prediction of Drill-failure Using In-process Measurements of Thrust Force

[+] Author and Article Information
A. Thangaraj, P. K. Wright

Department of Mechanical Engineering and the Robotics Institute, Carnegie-Mellon University, Pittsburgh, PA 15213

J. Eng. Ind 110(2), 192-200 (May 01, 1988) (9 pages) doi:10.1115/1.3187869 History: Received January 30, 1988; Online July 30, 2009


A real time control system has been developed in the laboratory to monitor the performance of twist drills. Emphasis has been placed on the prediction of the incipient failure of the drill and retraction before significant damage has occurred. It has been found that the gradient of the drilling thrust force, calculated using a digital filter with the necessary frequency specifications, exhibits a sharp increase several seconds before any serious failure. Details of the filtering technique and results for several cutting conditions are presented.

Copyright © 1988 by ASME
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