Method and apparatus for aligning two work pieces for welding an

Details Method and apparatus for aligning two work pieces for welding an Method and apparatus for aligning two work pieces for welding an

1984-03-14

1987-02-24

Goldberg, E. A.

Electric heating

Metal heating

For bonding with pressure

219 53, 219 55, 219104, B23K 1102

Patent

active

046458972

ABSTRACT:
A rail alignment device and a shear head are suspended from a trolley running over a rail welding machine. The alignment device comprises structure forming a downwardly-opening bight and carrying locating stops, clamping cylinders and transducers with sensing plungers all of which project into the bight. The rail ends to be butt-welded are received within the bight for alignment. One of the rails is clamped against the stops by the cylinders. The location of the other rail relative to the structure is sensed by the transducers and the machine clamps are adjusted until those transducers indicate alignment of the rails. The device is then removed and stored remote from the gap, with the shear head, during welding. The shear head comprises a horseshoe-shaped back plate which carries three cutting tools. An arm, which is pivotally mounted on one of the ends of the back plate and adapted to be latched to the other end to close the bight of the back plate, carries a fourth cutting tool. After welding, the shear head is lowered into the gap until its upper tool abuts the top of the welded rail between the weld and the movable head. The arm is raised and latched automatically to complete a continuous frame of cutting tools around the rail. The shear head is then driven across the weld by the movable head to remove weld upset.

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