Electric heating – Metal heating – For bonding with pressure
Patent
1980-04-02
1982-04-06
Truhe, J. V.
Electric heating
Metal heating
For bonding with pressure
219 60R, 219 66, 219 97, 228 49B, B23K 1104, B23K 3704
Patent
active
043237525
ABSTRACT:
A pipe resistance butt welding apparatus disposable within the pipes to be welded comprises a fixed expanding clamp and a movable expanding clamp, provided with clamping elements and actuating cylinders and intended to fix the pipes to be welded with respect to the apparatus. A cylinder to effect an axial movement of the movable expanding clamp is installed at the end at which this expanding clamp is located; the axial movement provides for drawing together the ends of the pipes to be welded in the course of fusion and upsetting. The cylinder for the axial movement of the movable expanding clamp is coupled with the actuating cylinder of the same clamp and with the clamping elements. The devices making up the apparatus and the cylinders are coaxially installed within a body wherefrom the clamp elements extend outwardly to engage the inner surface of the pipes being welded. Modifications of the apparatus for weld-joining of medium and large diameter pipes respectively are also described.
REFERENCES:
patent: 3164712 (1965-01-01), Paton et al.
patent: 3355792 (1967-12-01), Cunningham
patent: 3979041 (1976-08-01), Kaneyama et al.
patent: 4053973 (1977-10-01), Meli
patent: 4253599 (1981-03-01), Slavens
patent: 4273895 (1981-06-01), Paton et al.
Welding Design & Fabrication, Feb. 1979, pp. 49-53; "Flash Butt Welding a 56-inch Pipeline" by Ted B. Jefferson.
Galyan Boris A.
Kuchuk-Yatsenko Sergei I.
Lebedev Vladimir K.
Paton Boris E.
Sakharnov Vasily A.
George Keith E.
Truhe J. V.
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