Method and apparatus for controlling forging force during flash

Details Method and apparatus for controlling forging force during flash Method and apparatus for controlling forging force during flash

1998-06-12

2000-12-19

Heinrich, Samuel M.

Electric heating

Metal heating

Rail bond

219 97, 228102, 228265, 228 443, B23K 1100, B23K 1104, B23K 1124

Patent

active

061630039

ABSTRACT:
A method and apparatus are provided for flash butt weld joining adjacent rail ends on site during initial field installation where at least one of the rails is fastened to the roadbed, and inclosure butt welding rails as in de-stressing long sections of rail track where both rails are fastened to the roadbed. The method and apparatus apply electrical power to the adjacent rail ends while simultaneously effecting relative closing movement between the rails ends through actuating means so as to bring the rail ends into position to effect current flow between the rail ends, and determining a force necessary to move the adjacent ends into a welding position under varying environmental conditions of the rails as the adjacent rail ends close and during flashing of the adjacent rail ends due to the current flow. The determined force is added to a predetermined upset force dependent on the rail cross-section so as to establish a total forging force that forges the adjacent rail ends into a flash butt weld joint using the total forging force.

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