Apparatus for cutting precision notches in work surfaces

Details Apparatus for cutting precision notches in work surfaces Apparatus for cutting precision notches in work surfaces

1989-02-27

1990-08-14

Leung, Philip H.

Electric heating

Metal heating

Cutting or disintegrating

219 6916, B23H 100, B23H 726, B23H 900

Patent

active

049489330

ABSTRACT:
A portable electrode arc cutting tool 11 for cutting internal and external precision notches in a work surface in which the tool is releasably attachable to the work surface and a calibrated feed control (14,112,185) is used to bring a surface configured electrode member (68,101,173) into close proximity to the work surface. Thereafter, upon the application of arc discharges of electrical current between the electrode member and the work surface and use of a cooling and flushing fluid, the electrode member cuts a precision depth notch in the work surface in an embodiment for internal use within pipe. The tool includes releasable attachment means (12,91,141) for stabilizing the tool within the bore of the pipe. In a tool used for external cutting of notches, the tool is releasably attached to an outer work surface.

REFERENCES:
patent: 3318793 (1967-05-01), Webb
patent: 3610865 (1971-10-01), Osenbruggen
patent: 4162383 (1979-07-01), Hamasaki
patent: 4439659 (1984-03-01), Shimizu
patent: 4476368 (1984-10-01), Cammann et al.

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