Backward extrusion process for inner profiles

US8011220B2 · kind B2 · utility

Assignee

• GKN Driveline International GmbH · DE

Inventors

• Ulrich Brochheuser · Neunkirchen, DE
• Andreas Gehrke · Siegburg, DE

Key dates

• Filing date: Jun 4, 2005
• Grant date: Sep 6, 2011
• Expiry date: May 16, 2028

Classification

• Technology area (CPC B): Performing Operations; Transporting
• CPC primary: B21K1/762
• WIPO field: Machine tools
• WIPO sector: Mechanical engineering

Abstract

A process of producing an inner profile (18)in a tube or hollow profile (11) includes inserting the tube or hollow profile (11) into a supporting sleeve (12), with a first tube end (19) being axially supported; placing a pressure-loaded annular die 16 on to the other tube end (20); pressing a forming die (15) with an outer profile into the tube or hollow profile (11) from the latter tube end (20) for producing the inner profile (18); allowing a return of the annular die (16) under a pressure load in the opposite direction of that of pressing in the forming die (15).