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. 27, 2026
Filed:
Jun. 17, 2025
Tianjin University, Tianjin, CN;
Lianyong Xu, Tianjin, CN;
Kangda Hao, Tianjin, CN;
Yongdian Han, Tianjin, CN;
Lei Zhao, Tianjin, CN;
Wenjing Ren, Tianjin, CN;
Tianjin University, Tianjin, CN;
Abstract
A backing welding process curve based on a narrow-gap U-groove and its application and product are provided. The backing welding process curve is used for welding the narrow-gap U-groove. On the basis of a CMT reference curve, at least one current pulse is introduced before and after the short-circuiting phase respectively, to increase the root weld width and avoid root concavity. Meanwhile, the peak current and cycle time are increased to enhance welding heat input, while the peak current rise rate and peak current fall rate are reduced to prolong the peak current action time.