The machine to be welded has electric arc is fed by a direct current which is superimposed a current pulse of a variable frequency

摘要

The invention relates to machines to be welded to an electric pulse and it is intended to be welded specially a machine of this type, in which an arc current pulse is superimposed periodically has a direct current of the welding applied between an electrode constituted by a wire and the workpiece to be welded. / p & & p & the machine comprises a metallic wire 20 serving as an electrode, a welding torch 24 is fixed in front of a workpiece to be welded, has a certain distance from that - latter, a device serving to provide a protective gas in a zone of the welding of the workpiece to be welded, a device for running having the role of this metallic wire unroll serving as an electrode in the direction of the torch, a source of the base current serving to supply an intensity of the metallic wire 20 serving as an electrode and the workpiece to be welded, a pulsed current source is used to supply a pulsed intensity between the metallic wire 20 serving as an electrode and the workpiece to be welded, and a circuit of the variation of frequencies. / p & & p & application to the welding of any metal.