Device for early detection of breaks and marginal wear in the cu

Details Device for early detection of breaks and marginal wear in the cu Device for early detection of breaks and marginal wear in the cu

1987-11-20

1989-12-05

Noland, Tom

Electricity: measuring and testing

Conductor identification or location

Inaccessible

324 65R, 73104, 407113, G01N 358, G01N 356, G01N 2702, B23Q 1709

Patent

active

048855308

ABSTRACT:
A device for the early detection of breaks and/or marginal wear in the cutting edge in machine tools equipped with reversible cutting plates having at least one insulated conductor path embedded in their cutting edge, with the conductor path being in communication with a voltage source and forming part of a circuit for actuating a signal to break off a machining process. The conductor path is part of an alternating circuit which is connected with the voltage source without physical contact. An induction coil disposed in the tool is able to induce a current in a circuit closed within the cutting plate itself and this current is measured by a measuring coil disposed in the tool. In some embodiments, insulated conductor paths in the reversible cutting plate are capacitively coupled with the voltage source without contacting it.

REFERENCES:
patent: 3406802 (1968-10-01), Needham et al.
patent: 3550107 (1970-12-01), Thompson et al.
patent: 3641431 (1972-02-01), Pigage et al.
patent: 4106332 (1978-08-01), McKeown
patent: 4168464 (1979-09-01), Coulson et al.
patent: 4326257 (1982-04-01), Sata et al.
patent: 4694686 (1987-09-01), Fildes et al.
patent: 4744241 (1988-05-01), Mayer

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