Drill Wear Monitoring in Circuit Board Manufacturing Using Drilling Forces and Their Spectra

[+] Author and Article Information
Ciro N. Ramirez

International Business Machines Corp., Austin, Texas 78758

R. Joe Thornhill

International Business Machines Corp., Austin, Texas 78758, The University of Texas at Austin, Austin, Texas 78712

J. Electron. Packag 114(3), 342-348 (Sep 01, 1992) (7 pages) doi:10.1115/1.2905461 History: Received October 05, 1991; Revised June 25, 1992; Online April 28, 2008


The potential application of indirect tool wear monitoring methods in circuit board drilling is discussed. Monitoring methods are discussed and the state of tool wear monitoring research is presented. The nature of cutting forces developed in drilling FR-4 is examined using a simple numerical model of drilling which explains the structure of drill vibration spectra. The spec ta of predicted forces are shown to have nonzero amplitudes only at multiples of the fundamental frequency of the drill. Experimental spectra are presented which agree with these predictions.

Copyright © 1992 by The American Society of Mechanical Engineers
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