Argon arc welding process for narrow gap hot wire

Abstract

The invention provides an argon arc welding process for a narrow gap hot wire. The process comprises pre-welding preparation processes which comprise a groove formation process, a groove butt joint assembly process, a welding material selection process and a welding parameter setting process, a bottoming welding process, a filling welding process and a surface covering welding process. In the improvement of the process, a groove is a narrow gap U-shaped groove; a hot wire process is used for the bottoming welding process, the filling welding process and the surface covering welding process; the argon arc welding process meets the requirements of full-automatic all-position welding and has a reasonable design; by the process, welding processes can be reduced, welding materials can be saved, cost and labor intensity of workers can be reduced, and welding quality and efficiency can be effectively improved; and the process is particularly suitable for the pre-manufacturing welding of a pipeline which cannot be rotated.

Description

technical field [0001] The invention relates to welding technology, in particular to a narrow gap hot wire argon arc welding process. Background technique [0002] With the development of modern industrial technology and the continuous expansion of production scale, the workload of process pipeline prefabrication has greatly increased. At the same time, the diameter of process pipeline is getting larger and the wall of the pipe is getting thicker. To meet the needs of modern production development, for example, the process pipeline used in the construction of offshore engineering blocks has a maximum pipe diameter of 30in and a pipe wall thickness of 56mm. If ordinary manual argon arc welding is still used, two welders with conventional V-shaped grooves should be used Welding at the same time requires 3 to 4 days of welding, which obviously cannot meet the requirements of the current production situation. [0003] In view of this, the use of highly automated welding equipme...

AI Technical Summary

Problems solved by technology

[0002] With the development of modern industrial technology and the continuous expansion of production scale, the workload of process pipeline prefabrication has greatly increased. At the same time, the diameter of process pipeline is getting larger and the wall of the pipe is getting thicker. To meet the needs of modern production development, for example, the process pipeline used in the construction of offshore engineering blocks has a maximum pipe diameter of 30in and a pipe wall thickness of 56mm. If ordinary manual argon arc welding is still used, two welders with conventional V-shaped grooves should be used Welding at the same time requires 3 to 4 days of welding, which obviously cannot meet the requirements of the current production situation.