Machine for manufacture of spiral tubing with folded seam.

摘要

0 A machine for manufacture of spiral tubing with folded seam, including a number of preshaping roller pairs (19,19') for a strip material and a folding roller pair (27, 28), arranged to form a folded seam in connection with a coiling and tube shaping tool (32), each roller pair (19, 19', 27, 28) being arranged with a separate hydraulic motor (17), arranged to drive one of the rollers (19', 27), the second roller (19, 28) being connected and driven by means of a cog wheel transmission, a chain transmission or similar, the transmission driven rollers (19, 28) being arranged movable in relation to the adjacent rollers (19', 27) in the same roller pair and being spring loaded in direction towards same, the hydraulic motors (17) being connected to each other in series, thus driving the individual roller pairs (19,19', 27,28) with a successively reduced speed, each roller (19, 19', 27, 28) including at least one surrounding circumferential groove (20), into which semi-circular ring members (21,21'), having an outwardly extending portion, or a groove, at the outer peripheral surface, are insertable and attachable.