Gas tungsten arc welding system based on near-field ultrasonic levitation technology

Abstract

The invention belongs to the technical field of welding and discloses a gas tungsten arc welding system based on a near-field ultrasonic levitation technology. The gas tungsten arc welding system comprises a welding system consisting of a gas tungsten arc welding gun and a welding power supply and an ultrasonic levitation system consisting of an ultrasonic generator and an ultrasonic generator power control box; the ultrasonic generator comprises an transducer and an amplitude-change pole; the ultrasonic generator is used for acting on a welding pool while a gas tungsten arc welding gun welds a workpiece to be welded; and the end part of the amplitude-change pole of the ultrasonic generator is positioned below the welding pool at a welding station except a downward welding station. According to the gas tungsten arc welding system disclosed by the invention, the near-field ultrasonic levitation technology and a gas tungsten arc welding technology are combined, and a relative position of the ultrasonic levitation system and the welding system is specified, so that an electric arc force borne by pool metal and an ultrasonic levitation force are mutually overlapped, the electric arc force and gravity borne by the pool metal reach a balanced state, the flowing of the pool metal under the action of gravity is prevented, and high-efficiency welding and high forming rate of weld joints are realized.

Description

technical field [0001] The invention belongs to the field of welding technology, and in particular relates to a gas tungsten shielded welding welding system based on near-field ultrasonic levitation technology. Background technique [0002] Although the forms and structures of large-scale structural parts in the construction of major international projects vary widely, all-position welding forming technology has always been the core of large-scale structural part manufacturing and a key technology that needs to be overcome urgently. During all-position welding, under the action of the gravity field, it is easy to cause the metal in the molten pool to flow downward, which cannot guarantee the consistency of weld formation. The welded structure puts load-bearing requirements on the connection parts, while the welded joint has restrictions on the shape and size of the molten pool, that is, a small molten pool cannot meet the strength requirements, and a large molten pool causes...

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Problems solved by technology

[0003] In the process of realizing the present invention, the inventor found that due to the limitations of the molten pool metal flowing under the action of gravity, etc., the all-position welding method currently has the following problems: First, it is necessary to timely adjust the force and heat of the molten pool during the welding process, etc. , so the current all-position welding is mainly completed by manual welding, the welding efficiency is low, and cannot meet the production demand; The pool metal flows downward, the size of the molten pool is limited, and only smaller welding specifications can be used, which seriously affects the research and development of all-position welding methods for large molten pools

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