Importance

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Abstract

A welding seam back-up arrangement for mounting on the backside of the adjacently positioned edge margins of work members or workpieces that are to be joined by a weld seam, which is selectively variable as to length to accommodate it to weld seams of different lengths, and which comprises a plurality of tape engaging elongate channel members hingedly or otherwise interconnected in end-to-end relation and adapt it to be longitudinally positioned over a seam back-up tape of a material such as fiberglass, an elongate bar of a material having high heat conductivity characteristics, such as copper or aluminum, being interposed in the channel in underlying relationship to the tape to form a heat sink for conducting heat away from the weld seam during a welding operation. The channel members and their associated heat sinks are secured in operative relationship with respect to the adjacent edges of the workpieces to be welded by means of appropriate holding brackets placed at spaced intervals along the seam, each bracket being provided with at least one magnet for releasable attachment to an adjacent face of one of the workpieces and containing spring means for applying a pressure against the associated channel member to hold a back-up tape in its operative position.

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First Claim