Arrangement for the internal high-pressure forming of hollow profiles

US6012317A · kind A · utility

Assignee

• Daimlerchrysler AG · US

Inventors

• Pierre Bonny · Hamburg, DE
• Thomas Huelsberg · Schwäbisch Hall, DE

Key dates

• Filing date: Sep 28, 1998
• Grant date: Jan 11, 2000
• Expiry date: Sep 28, 2018

Classification

• Technology area (CPC B): Performing Operations; Transporting
• CPC primary: B21D26/045
• WIPO field: Machine tools
• WIPO sector: Mechanical engineering

Abstract

An arrangement for the internal high-pressure forming of hollow profiles has an internal high-pressure forming tool, into whose die sinking the hollow profile can be inserted. At least one axial die has a sealing head which can be inserted with play by a section into the hollow profile. This sealing head has a support part which is provided with a pressure fluid duct and on which a sealing arrangement is held and which is rigidly connected with the axial die, and has a stop surface, which in the operative position of the sealing head rests on the face side against the end of the hollow profile. The sealing arrangement contains at least one sealing element which can be radially spread open for an allaround sealing contact on the interior side of the hollow profile. To achieve a reliable fluid high-pressure-tight sealing in a simple manner without deformation of the hollow profile, so that a forming is permitted which is secure with respect to the process relative to stable pressure conditions during internal high-pressure forming, the sealing arrangement has a supporting ring which supports the sealing element, can be axially displaceably guided on the support part relative thereto …