Arc shield

Details Arc shield Arc shield

B - Operations, Transporting

23

K

327/58

B23K 9/20 (2006.01) B23K 9/32 (2006.01)

Patent

CA 1202688

ABSTRACT Apparatus and methods for replacing or repairing missing or damaged abrasion resistant wearbars utilized in high velocity cyclone boilers. A retrofit wearbar having an aperture therein is utilized in conjunction with an end weldable stud wherein the wearbar and stud are placed in position over a damaged wearbar or against the boiler tube in the case of a missing wearbar and the stud end welding technique utilized to fuse the wearbar and stud in place with the damaged wearbar or boiler tube in the case of a missing wear- bar in situ. An arc shield is utilized which has a projection from the weld fillet cavity thereof which cooperates in conjunction with the aperture of the retrofit wearbar to provide alignment of the stud in the wearbar and pre- vent shorting of the stud to the wearbar during the welding cycle.

459710

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