Patent ID: 7489412
Filing Date: 2009-02-10
Classification: B21D

Abstract:
1. A method for determining the three-dimensional geometry of a bent extruded section comprising: holding the extruded section in a feed and fixing unit in a region along a first rectilinear center axis (A) of the extruded section; bending the extruded section through a predeterminable bending angle α by means of a bending device; wherein the region of the first rectilinear center axis (A) adjoins one side of a bent region of the extruded section which has been produced by the bending operation; wherein a region having a second rectilinear center axis (B) adjoins the opposite side; wherein the three-dimensional position of the second rectilinear center axis (B) is determined relative to the known three-dimensional position of the first rectilinear center axis (A) of the extruded section while the extruded section is being held in a three-dimensional fixed position by the feed and fixing unit and the bent region of the extruded section is being released from the bending device; wherein the bending angle α is determined by forming a section between the two axes (A) and (B); wherein the extruded section is displaced and/or rotated along the feed and fixing unit; wherein a further bending operation is carried out at a further location comparable to the first bending operation in the region along the first rectilinear center axis (A) of the extruded section; wherein a bending angle α′ obtained by the further bending operation is determined, wherein the advance of the extruded section along the feed and fixing unit between two successive bending operations is recorded; and wherein the rotation angle through which the extruded section is rotated between two successive bending operations is recorded.