Patent ID: 7441432

Claim:
A production line for the manufacture of a product through hydroforming, said production line comprising: a decoiler ( 11 ) for unrolling a steel strip ( 12 ) from a coil ( 13 ) a roll-forming unit ( 14 ) for folding the steel strip into a tube ( 16 ), a welding unit ( 17 ) for welding together edges of the steel strip, a hydroforming unit ( 18 ) comprising a mold ( 19 , 20 ) movable between opened and closed positions to receive in said opened position a completed tube as the tube is being formed and welded, a cutting arrangement ( 24 , 25 ) for cutting off a completed product ( 23 ) that has been removed from the hydroforming unit, sealing arrangements ( 30 - 33 ; 35 - 39 ) at two ends of the mold to seal the tube, and a line ( 38 ) for the supply of pressure medium through one of the sealing arrangements to place the tube under pressure.