METHOD AND DEVICE FOR PRODUCING STRAIGHT BEAD WELDED PIPES FROM FLAT SHEET METAL BLANKS

摘要

The invention relates to a method and device for producing straight bead welded pipes made from sheet metal blanks with parallel longitudinal edges. A sheet metal blank (B) is inserted into cylindrical forming gaps (9) in two form tool halves (2, 3). The longitudinal edges that emerge from the forming gaps (9) at the vertex of the two form tool halves (2, 3) are held in a welding position, whereby a butt joint is formed. The longitudinal edges are subsequently welded together using a welding device (5) that can move over t he joint gap.