Apparatus and method for drill wear prediction

Details Apparatus and method for drill wear prediction Apparatus and method for drill wear prediction

1991-03-26

1993-03-23

Lall, Parshotam S.

Boots, shoes, and leggings

36447417, 364554, G06F 1546

Patent

active

051970180

ABSTRACT:
A method is provided for detecting drill bit wear. Vibratory data is collected during the drilling of a reference hole into a workpiece. An autoregressive model is applied to the vibratory data collected during the drilling of the reference hole to determine reference hole characteristic parameters for the drill bit. Vibratory data is then collected during the drilling of a subsequent hole into the workpiece. The autoregressive model is applied to the vibratory data, collected during the drilling of the subsequent hole to determine subsequent hole characteristic parameters for the drill bit. The reference hole characteristic parameters are compared with the subsequent hole characteristic parameters to detect drill bit wear between the time of drilling of the reference hole and the time of drilling of the subsequent hole.

REFERENCES:
patent: 3694637 (1972-09-01), Edwin et al.
patent: 4471444 (1984-09-01), Yee et al.
patent: 4514797 (1985-04-01), Begin
patent: 4894644 (1990-01-01), Thomas
patent: 5081599 (1992-01-01), Saito

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