U.S. Philips Corporation

Gerrit W Tichelaar

Wilhelmus Gerardus Essers

Gerardus Jelmorini

Gerardus A Willems

Plasma-MIG welding in which a thermally ionizable gas stream is flowed through a nozzle non-consumable electrode having a central orifice and a surrounding annular opening toward a workpiece and is thereby split into a central gas column enveloped by an annular gas shield. A consumable electrode is fed through the central gas column toward the workpiece, with the establishment of a MIG-arc therebetween. A plasma arc is then spontaneously established by means of the MIG-arc between the nozzle non-consumable electrode and the workpiece. The central plasma gas column is accelerated by constriction of the annular gas shield downstream of the nozzle non-consumable electrode.

Method of and welding torch for arc welding

A method of plasma MIG welding in which an arc is maintained between a workpiece and a welding wire in a thermally ionized gas (auxiliary plasma) which is generated by an electric gas-discharge between two non-consumable electrodes; neither the welding wire nor the workpiece acts as a single electrode for generating the thermally ionized gas.

Method of and device for arc welding

A compact plasma-MIG welding torch in which the non-consumable electrode and the contact tube for the consumable electrode are accommodated in separate passages in the housing whereby the distance between the non-consumable electrode and the contact tube becomes comparatively small, the distance between the contact tube and the nozzle is short, and the extension of the consumable electrode is small during welding.

Welding torch for plasma-MIG-welding

Plasma MIG welding in which a plasma flow is generated between a non-consumable electrode and a workpiece, and a consumable electrode is fed through such plasma flow toward the workpiece to establish a MIG arc between the same. The current intensity in the plasma flow is increased by applying additional current thereto from an annular auxiliary non-consumable electrode surrounding the plasma flow and positioned between the primary non-consumable electrode and the workpiece.

Method of and device for plasma MIG welding

A compact plasma-MIG welding torch in which the contact tube and the nozzle are directly connected together electrically, thereby enabling welding with a very short extension of the welding wire.

Device and welding torch for plasma-mig-welding

Method of arc welding in which an electric arc is maintained between a welding wire and a workpiece in a thermally ionized gas which is produced by an electric arc maintained between the workpiece and the inner surface of a nozzle which acts as a non-consumable electrode as a substitute for a separate tungsten electrode.

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Eindhoven, Netherlands

Gerrit W Tichelaar