Method and device for producing straight bead welded pipes from flat sheet metal blanks

US6494360B1 · kind B1 · utility

Assignee

• THYSSEN KRUPP STAHL AG · DE

Inventors

• Thomas Flehmig · Ratingen, DE
• Klaus Blümel · Dinslaken, DE
• Thomas Neuhausmann · Moers, DE

Key dates

• Filing date: Dec 22, 2000
• Grant date: Dec 17, 2002
• Expiry date: Dec 22, 2020

Classification

• Technology area (CPC B): Performing Operations; Transporting
• CPC primary: B21C37/16
• WIPO field: Machine tools
• WIPO sector: Mechanical engineering

Abstract

An apparatus to produce straight bead welded tubes from flat sheet metal blanks with two parallel longitudinal edges includes two form tool halves. The two form tool halves have outer cylindrical half shells borne by a tool support, and are disposed laterally inverted in relation to one another. They are moved towards one another and out of an opened receiving position for the sheet metal blanks into a closed position, in which the two longitudinal edges are held together by the two form tool halves. The apparatus also includes a welding device, which moves over the two form tool halves along the two longitudinal edges retained in a welding position. The two form tool halves have cylindrical internal mandrel halves which are fixedly associated with the outer cylindrical half shells and which cooperate with the outer cylindrical half shells to produce form gaps for insertion of the sheet metal blanks.