Method of flash butt welding

Details Method of flash butt welding Method of flash butt welding

1981-12-15

1983-11-22

Reynolds, B. A.

Electric heating

Metal heating

For bonding with pressure

219100, B23K 1104

Patent

active

044171218

ABSTRACT:
The parts to be welded together are caused to continuously approach each other and their ends are fused by an alternating current, and concurrently an oscillatory motion along the direction of approach is imparted to one of the parts, whereby additional relative movements of the parts towards and away from each other are accomplished. During the stage of a relative movement of the parts being welded together away from each other, the welding voltage is reduced to within the range of 0.7 to 0 of its working value, and during the stage of a relative movement of the parts towards each other, the voltage is restored to its initial value. Reducing the voltage is carried out in a time interval of not less than 1/8 of the period of the oscillatory motion from the beginning of the relative movement of the parts away from each other, and restoring it, in a time interval of not more than 1/8 of the period of the oscillatory motion from the beginning of the relative movement of the parts towards each other. The voltage may be reduced to within the same range for the periods when the resistance across contacts exceeds a predetermined value.

REFERENCES:
patent: 2677037 (1954-04-01), Platte
patent: 4352972 (1982-10-01), Lebedev et al.

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