Bending mandrel for bending device for inserting bends into straight tubes, has expanding element with bodies distributed at periphery, where bodies rest against each other along contact plane running via axis of mandrel in resting position

摘要

The mandrel (1) has cone- or wedge bodies (9, 10) displaceable in a direction of a central longitudinal axis (3) of the mandrel. The bodies rest against an expanding element (11) that encloses the bodies at a periphery side. The expanding element has spreading bodies that are distributed at a periphery. The spreading bodies rest against each other along a contact plane running via the central longitudinal axis of the mandrel in a resting position. A mandrel element (4) is pivot-movably arranged relative to a mandrel shaft (2) for production of tube bends. The mandrel element comprises a ball.