Method and device for production of a hollow section

US7343678B2 · kind B2 · utility

Assignee

• Daimler AG · DE

Inventors

• Wilfried Bien · Seevetal, DE
• Michael Halves · Hamburg, DE
• Thomas Hulsberg · Schwäbisch Hall, DE
• Uwe Klussmann · Schneverdingen, DE
• Bernhard Muller
• Holger Nuhn · Soltau, DE
• Ralf Punjer · Hamburg, DE
• Olav Reinhardt · Hamburg, DE
• Dirk Riewert · Hamburg, DE
• Alfred Riggers · Sittensen, DE
• Thorsten Sterna · Moisburg, DE

Key dates

• Filing date: Dec 13, 2004
• Grant date: Mar 18, 2008
• Expiry date: Dec 23, 2024

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10T29/53417
• WIPO field: Environmental technology
• WIPO sector: Chemistry

Abstract

The invention concerns a method and apparatus for production of a hollow section (1) in which a coiled pre-shape of the hollow section (1) is deep drawn from a sheet part, which is pre-bent after a trimming process and coiled into the final shape of hollow section (1). The edges (45) of hollow section (1) lying in the peripheral direction are then joined together in the contact region. In order to improve the joining capability of hollow section (1) to other components in simple fashion, it is proposed that before the coiling process at least one flat site (35) for joining to another component be embossed before the coiling process in a pre-bent region of the hollow section (1).