Method for the production of an internal stop in a tubular component

US11446729B2 · kind B2 · utility

Assignee

• Benteler Steel/Tube GmbH · DE

Inventors

• Daniel Lücke · Paderborn, DE
• Michael Markert · Augsburg, DE
• Marcel Wellpott · Paderborn, DE
• Dirk Tegethoff · Salzkotten, DE

Key dates

• Filing date: Dec 8, 2021
• Grant date: Sep 20, 2022
• Expiry date: Dec 8, 2041

Classification

• Technology area (CPC B): Performing Operations; Transporting
• CPC primary: B21D17/02
• WIPO field: Machine tools
• WIPO sector: Mechanical engineering

Abstract

An inner diameter of a first end of a tubular component, positioned in relation to a first die, is reduced through relative movement between the tubular component and the first die such as to produce a first conical area between first and second ends of the tubular component. The first conical area is then formed through relative movement of a second die to create in a longitudinal section of the first conical area an outer circumferential embossment and an inner bead having an inner diameter smaller than the inner diameter of the first end. The first end is widened through insertion of an inner tool, while the tubular component is supported on an outside in a mold cavity of an outer tool. An inner contour with an internal stop is formed as an outer surface of the first end of the tubular component rests flatly in the mold cavity.