Forging machine for mfg. tube with longitudinal seam weld - where forging rolls exert uniform pressure when squeezing the tube to make the weld

Metal strip or plate is bent into a tube with a longitudinal slot, the edges of which are heated to the forging temp. The tube then travels between forging rolls, which squeeze the edges of the slot together to make a weld. The machine bed supports two slides, each of which carries a servo hydraulic cylinder (SHC) (9,9') employed to move a bearing block (6,6') holding a forging roll rotating on a vertical axis. Each SHC is fitted with a sensor so the position of its piston can be fed to a control circuit; and SCH (9') is also connected to its block (6') by a sensor (11) monitoring the forging pressure, so the latter can be evenly distributed between the two rolls. The machine can be used to weld tubes with a wide range of dimensions. L'INVENTION CONCERNE UN BLOC FORGEUR POUR LE FORGEAGE DE LA LIGNE DE SOUDURE D'UN TUBE METALLIQUE.UN GALET 8 A AXE VERTICAL POUSSE PAR UN VERIN 9 EST ASSERVI EN POSITION SYMETRIQUE D'UN GALET 8 A AXE VERTICAL POUSSE PAR UN VERIN 9, LUI-MEME SOUMIS A UNE PRESSION DE CONSIGNE. DEUX GALETS OBLIQUES 16 POUSSES PAR DES VERINS OBLIQUES 18 AGISSENT SUR LES LEVRES. LE GALET 16 SUBISSANT LA PLUS FORTE REACTION DE POUSSEE EST ASSERVI EN POSITION D'EGALE HAUTEUR A CELUI QUI RECOIT LA PLUS FAIBLE REACTION DE POUSSEE.L'INVENTION S'APPLIQUE AU FORGEAGE DE LA LIGNE DE SOUDURE D'UN TUBE METALLIQUE.