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US 2012/0055911 A1Published application
Double wire gmaw welding torch assembly and process
AssigneePraxair Technology, Inc.
InventorsShijun Jia, Douglas Steyer, Xiangui Cao, Mohan Chobe, Tianming He
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Abstract
A double wire GMAW welding apparatus having a wire spacing adjustable torch assembly is disclosed. The double wire torch assembly has a wire spacing adjusting mechanism, by means of wire spacing adjustment the torch assembly can be used for a non-synchronized metal transfer weld process. The wires remain parallel before, during, after wire spacing adjustment.
Claims15
A double wire torch assembly for a GMAW welding apparatus comprising,
- two separate electrode wire conduits arranged to be parallel to each other in a torch body of the double wire torch assembly,
- two power supply connectors for connecting to two electric supplies,
- an electrode wire provided in each of said two wire conduits and positioned to be parallel to each other,
- a contact tip provided for each of said electrode wire,
- a shielding gas nozzle for directing a shielding gas from a shielding gas supply towards a weld area,
- a cooling chamber providing cooling of the nozzle and torch body, and
- a wire spacing adjusting mechanism capable of adjusting the distance between said two electrode wire conduits in an inter-wire parallel relationship, said two wire conduits being maintained in the parallel relationship with respect to each other before, during, and after the wire spacing adjusting so that the distance between the contact tip and the work pieces to be welded can be kept unchanged due to the parallel movement of said two electrode wire conduits.
4 more elements
(canceled)
Dependencies are inferred from the claim text.