Method and apparatus for the production of a tubular structure for a gas generator, and gas generator tubular structure

US11235372B2 · kind B2 · utility

Assignee

• Benteler Steel/Tube GmbH · DE

Inventors

• Daniel Lücke · Paderborn, DE
• Leonhard Rose · Borchen, DE
• Dirk Tegethoff · Salzkotten, DE
• Marcel Wellpott · Paderborn, DE

Key dates

• Filing date: Dec 19, 2017
• Grant date: Feb 1, 2022
• Expiry date: Mar 16, 2039

Classification

• Technology area (CPC B): Performing Operations; Transporting
• CPC primary: B60R22/4628
• WIPO field: Transport
• WIPO sector: Mechanical engineering

Abstract

In a method of producing a tubular structure for a gas generator, a tubular body is positioned relative to a forming device having inner and outer tools, which are moved relative to an end portion of the tubular body until an inner circumferential surface of a neck of the end portion rests against a support surface of the inner tool to reduce a diameter of the end portion by a tool contour of the outer tool and thereby form a shoulder. The outer tool is held in position upon the end portion and the neck inner circumferential surface is calibrated by a calibrating surface on a calibrating member of the inner tool while an outer circumferential surface of the neck is supported by the outer tool, as the inner tool is removed from the end portion. The outer tool is then removed from the end portion of the tubular body.