The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jan. 02, 2007
Filed:
Feb. 03, 2003
Rolf Larsson, LaxÅ, SE;
Rolf Larsson, LaxÅ, SE;
ESAB AB, Göteborg, SE;
Abstract
Welding headfor friction stir welding, adapted for connection and driving of a toolintended for simultaneous friction stir welding from two opposite surfaces on an object for welding, comprising a tool holder, a force-generating deviceand a rotary driving devicewhich, during operation, can impart to the connected toola cyclic movement around the centre axisof the tool and relative to the object for welding arranged in conjunction with the welding head. The force-generating device is controllable during operation and adapted so as, during operation, to act between a primary shoulderand a secondary shoulderon a toolconnected in the tool holder. The invention also comprises a welding system for friction stir welding, with the force between the shoulders of the tool being controlled depending on the current torque for rotary driving. Also indicated are a method for initiating friction stir welding and computer program for such a method.