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. 22, 2022
Filed:
Nov. 20, 2020
Fronius International Gmbh, Pettenbach, AT;
Peter Lattner, Pettenbach, AT;
Josef Artelsmair, Pettenbach, AT;
Fronius International GmbH, Pettenbach, AT;
Abstract
The invention relates to a method and a device () for welding by means of a non-consumable electrode (), wherein a welding current (I) alternating in polarity at a welding frequency (f) is applied by a current source () between the electrode () and a workpiece () in order to form an arc (), and the polarity is changed back to the polarity before the polarity change if the voltage (U) is above the voltage threshold value (U, U) and the welding current (I) is below the current threshold value (I, I). According to the invention, the welding voltage (U) and the welding current (I) after a preset duration (Δt) after the polarity change are compared with the voltage threshold value (U, U) and the current threshold value (I, I), and in addition the power (P) in the arc () is determined, and the polarity is changed back if the welding voltage (U) is greater than the voltage threshold value (U, U), and/or if the welding current (I) is less than the current threshold value (I, I), and/or the determined power (P) is less than a preset power threshold value (P).