公开(公告)号：US12202080B1

公开(公告)日：2025-01-21

申请号：US18741735

申请日：2024-06-12

Applicant: Tianjin University

Inventor： Lianyong Xu ,  Yongdian Han ,  Zhaowei Xue ,  Lei Zhao ,  Kangda Hao

IPC: B23K9/00 ,  B23K9/10 ,  B23K9/173

Abstract: A high-strength, high-toughness, and corrosion-resistant welding method for TKY nodes in a deepwater jacket includes the following steps: preheating T/K/Y nodes at a predetermined temperature according to a wall thickness of a base material; setting different welding parameters for different welding processes; and performing rooting weld on the preheated T/K/Y nodes through an electrode arc welding process, then performing filling weld through a gas metal arc welding process, and finally performing capping weld through the gas metal arc welding process. A corresponding electrode is selected for the rooting weld, a welding wire is selected for the capping weld according to low-strength matching, a welding wire is selected for the filling weld according to an equal-strength matching principle, and diffusible hydrogen contents of any electrode and any of the welding wires are all less than or equal to a predetermined diffusible hydrogen content.

公开(公告)号：US12005531B1

公开(公告)日：2024-06-11

申请号：US18475243

申请日：2023-09-27

Applicant: Tianjin University

Inventor： Yongdian Han ,  Zhaowei Xue ,  Lianyong Xu ,  Lei Zhao ,  Kangda Hao

IPC: B23K9/095 ,  B23K9/028

CPC classification number: B23K9/0953 ,  B23K9/028

Abstract: A method of automatically welding a welded seam of a saddle line for a saddle-type T joint belonging to the technical field of welding is provided, including: establishing a groove cross-sectional model, solving a variation law of a groove cross-sectional area, and planning a welding bead and a welding process parameter according to the groove cross-sectional area; establishing a welding torch pose mathematical model and obtaining a pose homogeneous transformation matrix T of a welding torch; establishing a three-dimensional model of a main pipe and a branch pipe, building a welding system through offline software, importing welding spot pose information, and generating welding torch pose offline command through the offline software; and performing automatic welding of the welded seam of the saddle line for the saddle-type T joint according to the planned welding bead and the welding process parameter and the generated welding torch pose offline command.

公开(公告)号：US11926002B1

公开(公告)日：2024-03-12

申请号：US18475219

申请日：2023-09-27

Applicant: Tianjin University

Inventor： Yongdian Han ,  Zhaowei Xue ,  Lianyong Xu ,  Lei Zhao ,  Kangda Hao

IPC: B23K9/095 ,  B23K9/013 ,  B23K9/16 ,  B23K101/10

CPC classification number: B23K9/095 ,  B23K9/013 ,  B23K9/16 ,  B23K2101/10

Abstract: The invention belongs to the field of welding technology and discloses a CMT automatic overlaying method for opening in side wall of bimetallic composite pipes. The method includes: establishing a mathematical model of the opening in a side wall to be welded; Based on the mathematical model, determining the trajectory of the saddle line during overlaying; dividing the trajectory of the saddle line into several welding runs, all of which adopt the downslope welding process; establishing a three-dimensional model of the opening in the side wall to be welded and a CMT overlaying system simulation model; Based on the simulation model, planning the overlaying path of the CMT overlaying, and generating an overlaying offline instruction; Based on the offline instruction, performing CMT overlaying on the opening in the side wall to be welded according to the overlaying sequence, so as to obtain a weld overlay.