Patent ID: 6662994
Filing Date: 2003-12-16
Classification: B23B,B23K

Abstract:
A jig for coaxially welding together a pair of generally coaxial tubular pipe ends meeting at a joint, the jig comprising:a pair of support bodies in the pipe ends flanking the joints, formed with axially inwardly open annular grooves, and each having an outer surface tapering axially inward toward the joint; respective arrays of wedges axially displaceable on the surfaces, whereby as the arrays are displaced apart the respective wedges move radially outward; respective springs engaging the arrays, urging the respective jaws radially together, and urging the respective arrays axially toward each other; an abutment between the arrays having annular end faces engageable axially outward with the respective wedges and formed with a pair of axially oppositely extending guide tubes fitting complementarily in the grooves and on which the respective bodies are axially slidable; means for drawing the bodies axially toward each other and thereby forcing the respective wedges radially outward.