Device for controlling the process of flash-butt welding

Details Device for controlling the process of flash-butt welding Device for controlling the process of flash-butt welding

1978-09-18

1980-06-17

Reynolds, B. A.

Electric heating

Metal heating

For bonding with pressure

B23K 1104

Patent

active

042085691

ABSTRACT:
The invention relates to a device for welding workpieces that have a large cross-sectional area, as well as for cases of high welding power requirements. The device in accordance with the invention comprises a mechanism for continuously displacing the workpieces being welded with a controlled drive, a mechanism for imparting to the workpieces additional reciprocating motion, a welding transformer, and a means for controlling the speed of the drive. The drive speed control means includes a welding-current pulse shaper coupled to the output of a current transformer, the latter being included in the primary circuit of the welding transformer and a welding-current pulse-length setter. The latter and the output of the pulse shaper are coupled to a comparator, the output whereof is coupled to the drive control circuit. In the course of flasing of the butt ends of the workpieces being welded, the welding-current pulse length is measured during each reciprocation period, and, depending on the error signal furnished by the comparator, the speed of continuous displacement of the workpieces being welded is adjusted.

REFERENCES:
patent: 3335257 (1967-08-01), Sakharnov et al.
patent: 3555237 (1971-01-01), Riley

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