Internal bore welding torch having removable flexible wand for r

Details Internal bore welding torch having removable flexible wand for r Internal bore welding torch having removable flexible wand for r

1984-04-27

1986-02-18

Albritton, C. L.

Electric heating

Metal heating

Of cylinders

219 602, B23K 9225

Patent

active

045714754

ABSTRACT:
An internal bore welding torch assembly and method for use in making remote arc welds inside metal tubes. The torch assembly includes a torch body unit of plastic electrical insulating material, to which is connected the necessary welding services of coolant, shield gas, and electric power. The body unit contains a removable and rotatable welding wand which is made of flexible plastic and has a welding electrode oriented radially at its outer end. For making a weld, such as for repairing a damaged tube, a metal sleeve is first inserted into the tube the flexible welding wand is then inserted into the tube and the radial electrode positioned adjacent an end of the sleeve. The flows of coolant and shield gas are provided through the torch body unit to the wand, and the wand is rotated while making the metal arc welds desired to seal weld the sleeve ends to the tube.

REFERENCES:
patent: 3493716 (1970-02-01), Martin
patent: 4147920 (1979-04-01), Merrick et al.

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