Method and apparatus for joining new electrode to consumed elect

Details Method and apparatus for joining new electrode to consumed elect Method and apparatus for joining new electrode to consumed elect

1995-04-28

1997-06-10

Hoang, Tu B.

Industrial electric heating furnaces

Arc furnace device

Electrode

373 94, 373100, 29705, H05B 714

Patent

active

056383983

ABSTRACT:
A new electrode is joined to a consumed electrode of the electric furnace according to a method comprising the steps of lifting and transporting the new electrode suspended from a joining apparatus by a crane, aligning both electrodes by throwing a laser beam from a projector disposed to the crane on a positioning marker disposed on a deck plate provided in the vicinity of the electric furnace, screwing a screw thread of the new electrode into a threaded hole of the consumed electrode by actuating an electric motor disposed in the joining apparatus, and tightening both electrodes at desired tightening torque by operating the motor in a stalled state with a small electric current of low frequency.

REFERENCES:
patent: 3559816 (1971-02-01), Hirata
patent: 3795753 (1974-03-01), Mori et al.
patent: 3937867 (1976-02-01), Wynne
patent: 4044199 (1977-08-01), Simon
patent: 4400815 (1983-08-01), Dunn et al.
patent: 4420838 (1983-12-01), Dunn et al.
patent: 4736384 (1988-04-01), Sakai et al.
patent: 5201112 (1993-04-01), Sevelinge

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