Method and apparatus for continuous production of tubular bodies by means of laser longitudinal seam welding

US4827099A · kind A · utility

Assignee

• Hoescht Aktiengesellschaft · DE

Inventors

• Rolf Krebs · Hamm, DE
• Otto Welsing · Hemer, DE
• Friedhelm Retzlaff · Kamen, DE
• Friedhelm Gunter · Dortmund, DE
• Hans-Jürgen Wahl · Munster, DE
• Manfred Gerber · Saskatoon, CA
• Heinz Gross · Lutherstadt Eisleben, DE

Key dates

• Filing date: Sep 18, 1987
• Grant date: May 2, 1989
• Expiry date: Sep 18, 2007

Classification

• Technology area (CPC F): Mechanical Engineering; Lighting; Heating
• CPC primary: F28F2275/067
• WIPO field: Machine tools
• WIPO sector: Mechanical engineering

Abstract

Method and apparatus for the continuous industrial production of tubular bodies in which coated or uncoated steel strip is formed to a slit tube and the opposite strip edges are longitudinally seam welded at high speed by a laser beam of high energy density under protective gas with or without supply of additive material, and after a preparation adapted to the narrow melt zone and bringing together of the strip edges a fusion welding with subsequent controlled cooling and upsetting is carried out which results in a seam geometry suitable for any further processing.