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:
Nov. 27, 2018
Filed:
Aug. 14, 2012
Hannes Raudsepp, Solna, SE;
Martin Andersson, Mariestad, SE;
Tomas Johansson, Laxa, SE;
Rikard Ljungkvist, Kula, SE;
Hannes Raudsepp, Solna, SE;
Martin Andersson, Mariestad, SE;
Tomas Johansson, Laxa, SE;
Rikard Ljungkvist, Kula, SE;
ESAB AB, Gotenborg, SE;
Abstract
The invention relates to a method for submerged arc welding comprising the steps of guiding a first hot wire () towards a work piece and guiding a cold wire () at a variable feed speed. The method further comprises the steps of continuously measuring, during a welding phase, at least a first active welding parameter related to at least said first hot wire () adjusting the cold wire () feed speed in dependence on at least first active welding parameter variations, to maintain high welding stability and high weld quality. The invention also relates to a system () for carrying out the method. The system () comprises hot wire feeding means () for feeding a first hot wire () towards a work piece and cold wire feeding means () for feeding a cold wire () at a variable cold wire () feed speed and a control unit () for controlling the second wire feeding means (). The system () also comprises measuring means () adapted to continuously measure at least a first active welding parameter related to said first hot wire (). The control unit () determines target values for the cold wire () feed speed, each target value corresponding to a first active welding parameter value and controls said second wire feeding means () to adjust said cold wire () feed speed to said target values.