Electric heating – Metal heating – For bonding with pressure
Patent
1974-10-15
1976-09-21
Truhe, J. V.
Electric heating
Metal heating
For bonding with pressure
B23K 1104
Patent
active
039820912
ABSTRACT:
Welding apparatus for welding railroad rails is movable plus or minus approximately two feet to compensate for the position of the continuous rail, i.e., the already welded together rail sections, as the latter is removed from the welding apparatus.
The welding apparatus also is provided with a vertical clamping and aligning system and a horizontal clamping and aligning system, each of which contain pairs of hydraulic cylinders, one of which is larger than the other, with the larger cylinder in each case being operable to a set position with respect to the rail line of the apparatus, to position the rail. The smaller cylinder then operates to effectively clamp the rail against an arm operated by the larger cylinder. The cylinders are connected in a parallelogram-type arrangement, with the entire arrangement being adjustable by means of still another hydraulic cylinder, for a final alignment adjustment.
Lever arms which support the electrodes to vertically clamp the rail are very rigid in the vertical plane in clamping the rail, but are flexible to some degree in a horizontal plane. This flexibility permits the level arms to be laterally adjustable during the horizontal clamping and aligning process, so that the horizontal and vertical aligning systems are not effectively opposing one another. The apparatus for shearing off the upset metal surrounding the welded joint can be operated without removing most of the clamps which support the rail.
REFERENCES:
patent: 2787698 (1957-04-01), Schlatter et al.
patent: 3036204 (1962-05-01), Stieglitz et al.
patent: 3134012 (1964-05-01), Neukom et al.
patent: 3595463 (1971-07-01), Fadeer et al.
H. A. Schlatter AG
Tone David A.
Truhe J. V.
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