Aluminum alloy TIG tracking method based on ultrasonic electric arc

Abstract

The invention relates to an aluminum alloy TIG tracking method based on an ultrasonic electric arc. The aluminum alloy TIG tracking method is used for overcoming the defects that aluminum alloy TIG single-pass welding is small in weld penetration depth, low in welding efficiency and poor in manual welding weld seam quality. According to the method, a small-angle double-exposure holographic interference method is designed; by means of the method, influences of an oxide active agent, a chloride active agent, a fluoride active agent and a mixed active agent formed by the oxide active agent, the chloride active agent and the fluoride active agent on arc plasmas are confirmed, and the active agent with the best arc gathering effect is selected as an experiment material; the selected active agent is sprayed, and ultrasound is loaded in the coaxial direction of the TIG electric arc; after welding starts, the waveform of welding current is extracted, the envelope curve value of semiconservative filtering is designed, tracking is conducted, and feasibility of the method is verified through the small-angle double-exposure holographic interference method. The method has the beneficial effectthat ordinary ultrasound and electric arc compound welding is achieved, and the ultrasonic electric arc and the surface active agent are fused.

Description

technical field [0001] The invention relates to the field of aluminum alloy TIG automatic welding, and is an aluminum alloy TIG tracking method based on an ultrasonic arc, which can realize automation while optimizing the welding quality of the aluminum alloy TIG welding. Background technique [0002] Aluminum alloy TIG welding is widely used because of its stable welding process, good weld formability, and high quality weld structure, but the shortcomings of single-pass welding, such as shallow penetration and low welding efficiency, limit its application range. In addition, the cost of aluminum alloy materials is high, and the success rate of manual welding is always unsatisfactory. Due to the existence of these conditions, the application of aluminum alloy plates is greatly limited. [0003] At present, various welding methods for aluminum alloys have been widely and deeply studied, but few people study the automation of aluminum alloy welding, and they cannot guarantee t...

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Problems solved by technology

[0002] Aluminum alloy TIG welding is widely used for its stable welding process, good weld formability, and high quality weld structure, but the shortcomings of single-pass welding, shallow penetration, and low welding efficiency limit its application range.

In addition, the cost of aluminum alloy materials is high, and the success rate of manual welding is always unsatisfactory. Due to the existence of these conditions, the application of aluminum alloy sheets is greatly limited.

[0003] At present, various welding methods for aluminum alloys have been widely and deeply studied, but few people study the automation of aluminum alloy welding, and they cannot guarantee the welding quality and efficiency of aluminum alloy thick plates. Generally, they are studying aluminum alloy welding. The feasibility of the alloy welding method cannot realize the automation of aluminum alloy welding, nor can it optimize the weld area. For example, a patent for a titanium alloy welding method based on arc ultrasound applied by Wu Minsheng of Tsinghua University and Fan Chenglei of Harbin Institute of Technology et al. applied for a patent for an aluminum alloy pulsed ultrasonic arc hybrid welding device and its welding method and an ultrasonic arc hybrid welding device. Their main processing purpose is to apply ultrasound to welding to refine the grain size of the welded joint , to improve the internal properties of the plate, but this method does not necessarily meet the requirements for welding thick plates of aluminum alloys, so it is not fully applicable, and they do not take into account the aspects of welding automation

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