Abstract: A bending machine that includes a device that is used to drive and support a tube that is to be bent in relation to a bending head which is disposed at one end of a frame of the bending machine. The device includes a mandrel member that is solidly connected to an expandable member that is selectively applied against an inner wall of the tube to be bent and movement means that is used to align the mandrel member relative to a section of the tube to be bent during a bending step and that moves the expandable member to move the tube in translation and/or rotation between bending steps and when the expandable member is expanded to engage the inner wall of the tube.

Abstract: The invention relates to a device that is used to drive and support a tube (10) that is to be bent in relation to a bending head (3) which is disposed at the end of the frame (2) of a bending machine (1). Said device comprises: a guide shaft (11) which is solidly connected to tightening means (12), said tightening means being applied against the inner wall of the tube (10) to be bent; and movement means (6) which are common to the shaft (11) and the tightening means (12).