Method and device for producing straight bead welded pipes...

B - Operations – Transporting – 21 – C

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B21C 37/08 (2006.01) B21C 37/16 (2006.01) B21D 5/10 (2006.01)

Patent

CA 2335517

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 forth 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 the joint gap.

L'invention concerne un procédé et un dispositif pour la production de tubes à cordons de soudure longitudinaux, à partir de découpes de tôle présentant des bords longitudinaux parallèles. A cet effet, une découpe de tôle (B) est insérée dans les fentes de formage (9) cylindrique de deux moitiés d'outil de formage (2, 3). Les bords longitudinaux sortant des fentes de formage (9) au sommet des moitiés d'outil de formage (2, 3), sont maintenus par ces deux moitiés d'outil de formage (2, 3) en formant un joint bout à bout dans la position de soudage. Ces bords longitudinaux sont ensuite soudés ensemble à l'aide d'un dispositif de soudage (5) pouvant être déplacés sur la fente de joint.

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