Method for producing a torsional profile from a tubular hollow profile, and torsional profile

Patent metadata

Field	Value
Publication number	US-10052671-B2
Application number	US-201514790713-A
Country	US
Kind code	B2
Filing date	Jul 2, 2015
Priority date	Jul 7, 2014
Publication date	Aug 21, 2018
Grant date	Aug 21, 2018

Abstract

A method for producing a torsional profile from a tubular hollow profile, the torsional profile being provided, over its entire length, with spaced-apart walls, is provided. The method includes placing the tubular hollow profile into a first deformation die, positioning the ends of the tubular hollow profile in the first deformation die by means of in each case one tapering first mandrel which extends into a torsional region, positioning the tubular hollow profile over its longitudinal extent in the first deformation die, deforming the tubular hollow profile over its longitudinal extent in the torsional region by means of a first punch, with a reduction in the tube cross-sectional area in the torsional region, and removing the first punch and the first mandrels.

First claim

What is claimed is:

1. A method for producing a torsional profile from a tubular hollow profile, the torsional profile being provided, over its entire length, with spaced-apart walls, the method comprising:
a) placing the tubular hollow profile into a first deformation die,
b) positioning the ends of the tubular hollow profile in the first deformation die by means of, in each case, a tapering first mandrel which extends into a torsional region,
c) positioning the tubular hollow profile over its longitudinal extent in the first deformation die,
d) deforming the tubular hollow profile over its longitudinal extent in the torsional region by means of a first punch, with reduction in the tube cross-sectional area in the torsional region, to produce a reshaped hollow profile,
e) removing the first punch and the first mandrels,
f) fixing the ends of the reshaped hollow profile in a second deformation die by means of, in each case, a tapering second mandrel which extends as far as the torsional region,
g) fixing the reshaped hollow profile over its longitudinal extent in the second deformation die,
h) deforming the reshaped hollow profile over its longitudinal extent in the torsional region by means of a second punch, with a reduction in the cross-sectional area of the reshaped hollow profile in the torsional region, to produce a further-reshaped hollow profile,
i) removing the second punch and the second mandrels, and
j) removing the further-reshaped hollow profile.

2. The method as claimed in claim 1 , wherein the deformation of the reshaped hollow profile is performed such that, in the region of the second mandrels, the reshaped hollow profile bears against the taper thereof.

3. The method as claimed in claim 1 , wherein, as a starting profile, use is made of a tubular hollow profile which is of circular, oval or variable or similar closed cross section.

4. The method as claimed in claim 1 , wherein the tubular hollow profile is deformed so as to form a profile which is V-shaped, U-shaped or similarly shaped in cross section.

5. The method as claimed in claim 1 , wherein 1 , wherein the first and/or the second mandrels are used which are equipped, at least in sections, with beads.

6. The method as claimed in claim 1 , wherein the first and/or the second deformation dies are used which are in the form of bottom dies.

7. The method as claimed in claim 1 , wherein the first mandrels, after being inserted into the tubular hollow profile, extend over up to one third of the tubular hollow profile.

8. The method as claimed in claim 1 , wherein the first and the second punches are used which are of identical form.

9. The method as claimed in claim 1 , wherein regions of the reshaped hollow profile which, during the further deformation, undergo no further deformation or only a small amount of further deformation are provided with readjusting guidance by way of readjusting guide elements.

10. The method as claimed in claim 5 , wherein the beads correspond to corresponding projections of the punches and/or of the deformation dies.

11. The method as claimed in claim 6 , wherein the first and the second deformation dies are of identical form.

12. The method as claimed in claim 7 , wherein the first mandrels, after being inserted into the tubular hollow profile, extend up to the middle of the tubular hollow profile.

Assignees

• Benteler Automobiltechnik Gmbh

Inventors

• Claussen Lars
• Hutabarat Goddy
• Krull Jan

Classifications

• B60G2206/202

  with a radially deformed tube as a cross member · CPC title

• B60G2200/21

  Trailing arms connected by a torsional beam, i.e. twist-beam axles · CPC title

• B21D22/025 Primary

  for tubular articles · CPC title

• B21D53/88

  other parts for vehicles, e.g. cowlings, mudguards · CPC title

• B60G21/051

  Trailing arm twist beam axles · CPC title