Patent ID: 6941787
Filing Date: 2005-09-13
Classification: B21D

Abstract:
1. A bending device for bending thin-walled metal tubes, comprising: a straight tube guide, a core template which adjoins the tube guide and is pivotable in relation thereto, said core template having a connection strip, a mandrel having a mandrel tip which is flexible in a region in proximity to said core template, and a mandrel shaft which adjoins the mandrel tip and is rigidly connected thereto and is axially fixed in said tube guide, wherein said mandrel tip comprises a solid cylinder made from an elastomer, said mandrel tip having an external contour which conforms to an inner contour of a metal tube to be bent, said mandrel tip being substantially incompressible radially, said mandrel tip extending into only a starting cross-section of a bending curve defined by the mandrel, said mandrel further comprising a clamping head which is insertable into the metal tube to be bent, said clamping head being positioned in a region of the core template and the connection strip, said clamping head being movable relative to the mandrel tip in a pivot range of the core template, and a traction unit attached to said clamping head, said traction unit comprising a retrieval element for said clamping head.