Electric heating – Metal heating – For bonding with pressure
Patent
1976-05-12
1978-07-25
Tolin, Gerald P.
Electric heating
Metal heating
For bonding with pressure
219108, 219161, B23K 1102
Patent
active
041031393
ABSTRACT:
Welding apparatus for welding railroad rails of a construction such that it 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. Accordingly, the entire length of the continuous rail need not be moved to properly position it with respect to the welding apparatus to form or make a subsequent weld.
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 than operates to effectively clamp the rail against an arm operated by the larger cylinder. Both of the pairs of cylinders are fed from the same source of hydraulic power. With this arrangement, the rails can be more accurately and quickly aligned. In addition, for still greater accuracy, 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.
The welding apparatus also has lever arms which support the electrodes to vertically clamp the rail which 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, as in the case of many of the welding apparatus in the prior art.
Still another feature of the welding apparatus is the fact that the deburring or shearing apparatus thereof for shearing off the upset metal surrounding the welding joint can be operated to do so, without removing most of the clamps which support the rail.
REFERENCES:
patent: 2404620 (1946-07-01), Cooper
patent: 2413663 (1946-12-01), Tiedemann
patent: 2727969 (1955-12-01), Platte
patent: 3036204 (1962-05-01), Stieglitz et al.
patent: 3665149 (1972-05-01), Sakabe et al.
H. A. Schlatter AG
Herkamp N. D.
Tolin Gerald P.
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