Patent ID: 7234333
Filing Date: 2007-06-26
Classification: B21D

Abstract:
1. A machine for bending rod-shaped or tubular work pieces, comprising: a bending head having a bending mandrel mounted on a rotational axis and rotatable by a rotary drive; a clamping device for pressing the work piece to be bent against a first forming groove on the bending mandrel; a feeding device for the work piece to be processed, whereby the clamping device is positionable relative to the bending mandrel and is also pivotable concentrically to the rotational axis of the bending mandrel, wherein the clamping device is attached to two mutually independent rotary drives, including a first rotary drive which pivots the clamping device about the rotational axis of the bending mandrel, and a second rotary drive which moves the clamping device with respect to the bending mandrel by using an interposed conversion transmission that converts a rotary motion to a linear motion, whereby the bending head includes three concentrically nested rotary shafts, including an innermost rotary shaft, a middle rotary shaft and an outer rotary shaft, to transmit rotary motion from a first a second and a third rotary input drives to the bending mandrel, to the conversion transmission and to the clamping device respectively.