Cutting tool wear monitor

Details Cutting tool wear monitor Cutting tool wear monitor

1987-05-26

1988-11-22

Briggs, William R.

Gear cutting, milling, or planing

Milling

With means to protect operative or machine

408 11, 409194, B23C 700, B23B 4900

Patent

active

047862203

ABSTRACT:
A method and apparatus by which the degree of wear and useful life limitations of a drill, end mill or other types of metal removal tools can be detected. The method is based on the short circuit current, open circuit voltage and/or power that is generated during metal removal by the utilization of an insulated rotary tool bit to which electrical contact is made by a non-rotating conductor and an insulated or non-insulated workpiece, with an external circuit connecting the tool and workpiece through a measuring device. The generated current, voltage or power shows a sharp increase or change in slope upon considerable tool wear and/or at the point of failure.

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