Abstract: An assembly for welding includes a frame member and a plurality of repositionable torches supported by the frame member adjacent a linear path of travel of a metal strip. The method includes the steps of welding the metal strip, ascertaining the character of the weld and repositioning the torches to alter the character of the weld.

Abstract: A scarfing apparatus for removing a weld bead from a tube being produced by a continuous method wherein the tube enters one end of a rotatable hollow spindle which supports a tool bit. The tool bit has an arcuate shape having a segment which extends 180.degree. or less about the periphery of the tube. The spindle oscillates rotationally causing the tool bit to rock back and forth across the surface of the moving tube to remove the weld bead. The tool bit is formed of carbide steel containing tantalum, titanium and cobalt. The tool bit has a forward face portion and a bottom face portion which define a tooling edge at their intersection. The bottom face portion slopes upwardly at an angle of approximately 3.degree. to reduce friction on the tube. For use with carbon steel tubing, a bit is used having a forward face portion angled approximately 15.degree. from the vertical. For use with stainless steel or aluminized material, a bit is used having a forward face portion angled back approximately 21.degree.

Abstract: A scarfing apparatus for removing a weld bead from a tube being produced by a continuous method, wherein the tube enters one end of a hollow spindle which rotatably supports a scarfing tool holder on which is mounted a tool bit. The tool bit has an arcuate shape having a segment which extends 180.degree. or less about the periphery of the tube. The other end of the spindle is provided with a sensing device which, in conjunction with a power unit and control means, applies oscillatory rotational movement to the spindle to thereby cause the tool bit to rock back and forth across the surface of the moving tube to remove the weld bead. The tool holder is provided with an undercut section adapted to receive securing means for mounting the tool bit in a manner to facilitate rapid removal thereof for installing a new tool bit without ceasing the operation of the continuous tube-forming apparatus.