Grinding wheel crack detector and method

Details Grinding wheel crack detector and method Grinding wheel crack detector and method

1982-09-09

1987-06-23

Schmidt, Frederick R.

Abrasive tool making process, material, or composition

Impregnating or coating an abrasive tool

51206R, 511345R, 324 52, B24B 100

Patent

active

046742352

ABSTRACT:
A grinding wheel capable of detecting and a method of monitoring it to detect, the development of a crack or like damage therein are disclosed. The wheel is constituted of an electrically nonconductive body having an electrically conductive strip, e.g. a thin film of an electrically conductive ink printed, of an electrically conductive paint applied, of a metal electrolessly or chemically deposited or of a metal electrolytically deposited, in a pattern, say, of quasi-circular or spiral configuration, on a portion of at least one side surface of the body. A current source is connected to the opposite ends of the conductive strip to pass an electric circuit therethrough. When a crack or like damage develops in the wheel body being rotated to perform a grinding operation, the circuit will be broken or a change in the current will occur, signaling the damage or crack formation.

REFERENCES:
patent: 2795680 (1957-06-01), Peck
patent: 2947121 (1960-08-01), Coes
patent: 3307972 (1967-03-01), Earhardt
patent: 3477019 (1969-11-01), Hartmann
patent: 3609495 (1971-09-01), Seesselberg
patent: 4006269 (1977-02-01), Kerfoot
patent: 4137516 (1979-01-01), Shaw et al.

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