Device for bending pipes

Abstract

The device bends pipes into a serpentine pipe bank having right-hand and left-hand bends, with the pipe being held, during the bending operation, in a bending rail and the pipe end to be bent being clamped in a bending form. The bending rail and the bending form are mounted in a cylindrical frame which is rotatable about the longitudinal axis of the pipe to be bent. After each formation of two 90.degree. bends, or one 180.degree. bend, the frame is rotated through 180.degree. with the pipe remaining stationary and with the bending rail and bending form completely disengaged from the pipe. The bending rail is adjustable in the frame to fixed positions in accordance with the diameter of the pipe to be bent, and the bending form, together with clamping jaws associated therewith, is pivotally mounted in the frame for swinging about an axis perpendicular to the axis of the pipe. The bending form and the associated clamping jaws are divided, in the plane of the pipe axis, into two form parts which are moved toward and away from each other by respective cylinders to clamp and to disengage the pipe. Successive pipes are removed from a pipe magazine by a measuring carriage which grips the removed pipe and remains gripped thereto during the bending operation. The cylindrical frame has a radial recess receiving the pipe bank during the bending operation, with the pipe bank being supported on a support table.