Abstract: A pipe bending machine comprising a bed plate which mounts a bending head, a mechanism for feeding pipes to be treated into the bending head, and a drive. The pipe feeding mechanism consists of two parallel rows of rollers arranged symmetrically in relation to the pipe axis and fitted into cages used commonly by each row. The rollers in each row and the associated cage are embraced by a hauling chain designed for coupling the drive which moves the chain toward the bending head. Placed on the outside on each chain is a closed-loop strip made of elastic friction material. A pipe to be treated is clamped in the gap between the strips and is fed to the bending head when the chains are displaced.The pipe bending machine of the present invention permits bending the pipes of any shape in space, including parts made of thin-walled and soft metal pipes.

Abstract: A bending head for a tube bending machine which includes a housing, having a through axial passage, mounted in a cantilever fashion on the framework of the machine for forceful rotation about its axis, the tube or billet being pushed through the head along this axis during a bending operation. The free end of the housing has mounted in the passage thereof a pair of support rolls and a pivotable arm, kinematically connected to the drive of the machine through a screw-and-nut couple and a gear, carrying a bending roll. The axes of rotation of the rolls and of the pivoting of the arm are substantially perpendicular to the axis of rotation of the housing. There is mounted in opposition to each support roll and the bending roll a respectively similar additional roll positioned symmetrically with respect to the axis of rotation of the housing.