Method for producing from a metal sheet a hollow profile which is longitudinally slotted and provided with several longitudinal segments having different cross sections

US7637135B2 · kind B2 · utility

Assignee

• ThyssenKrupp Steel Europe AG · DE

Inventors

• Lothar Hömig · Voerde, DE
• Uwe Kneiphoff · Dinslaken, DE
• Thomas Flehmig · Ratingen, DE

Key dates

• Filing date: Jun 22, 2004
• Grant date: Dec 29, 2009
• Expiry date: Jun 22, 2024

Classification

• Technology area (CPC B): Performing Operations; Transporting
• CPC primary: B21C37/185
• WIPO field: Machine tools
• WIPO sector: Mechanical engineering

Abstract

A method for producing hollow profiles provided with different cross sections along the length thereof includes shaping the profiles in a die from one piece of cut metal sheet. According to said method, a convex or concave rounding produced on the edges of a longitudinal section results in material excess or material shortage in the transition regions, thereby preventing the material thinning or thickening in said transition regions during forming.