Platform for measuring average arc force of superaudio-frequency pulse TIG (Tungsten Inert Gas) welding

Abstract

The invention discloses a platform for measuring average arc force of superaudio-frequency pulse TIG (Tungsten Inert Gas) welding, wherein the measurement platform comprises a welding gun, an X-direction sliding table, a Y-direction sliding table, a Z-direction coarse-tuning sliding table, a Z-direction fine-tuning sliding table, a processing platform, a force measurement sensor, a balance weight and a plurality of support connection plates used for supporting and connecting. The measurement platform disclosed by the invention is mainly used for measuring the arc force of the superaudio-frequency pulse TIG welding, and the arc force measurement of superaudio-frequency pulse welding of common metal materials can be realized; on the basis of the matched movements of the four sliding tables, a three-freedom movement system of the welding gun is designed, the welding gun moves along the direction of a welding joint due to the X-direction sliding table, the top end of a tungsten electrode and the welding joint are subjected to centering control due to the Y-direction sliding table, the distance between the top end of the tungsten electrode and a workpiece is adjusted accurately by the coarse-tuning sliding table and the fine-tuning sliding table in the Z-direction, and the arc is kept to be highly constant during a welding test.

Description

technical field [0001] The present invention relates to an arc force measuring platform, more particularly, refers to a platform capable of fast-transforming super-audio frequency pulse TIG (tungsten argon arc welding) ) Measurement platform for welding arc force. Background technique [0002] Titanium alloy, aluminum alloy, stainless steel and other metal materials are widely used in aerospace, transportation, shipbuilding and other fields. The welding technology and process determine the quality of weld forming and the performance of the workpiece after forming. The traditional welding method for aluminum alloys is AC argon tungsten arc welding, while DC argon tungsten arc welding is used for titanium alloys and stainless steel. In production practice, traditional argon arc welding has disadvantages such as low tensile strength, small section elongation, obvious hardening crack tendency and more pores; with the development of material processing technology, pulse argon ar...

AI Technical Summary

Problems solved by technology

In production practice, traditional argon arc welding has disadvantages such as low tensile strength, small section elongation, obvious hardening crack tendency and more pores; with the development of material processing technology, pulse argon arc welding has appeared and is in production It has been applied in practice, which improves the mechanical properties of the weldment to a certain extent, and has a positive effect on the optimization of its post-weld structure. However, due to the limitation of the main circuit design method of the welding power source, the traditional pulse tungsten argon arc welding power source The output current switching rate is low, only 5A / μs. In aluminum alloy welding, there will be a zero-crossing dead zone of several microseconds, resulting in arc extinguishing. In order to solve the above problems, welding workers have successfully developed a fast switching super The new audio pulse tungsten argon arc welding process can realize the switching rate of the output current exceeding 50A / μs, and the pulse current frequency is adjustable from 0 to 80kHz. Based on this new process, the mechanical properties of many commonly used metal materials after welding are greatly improved. It is the focus of current research to explore the optimization mechanism of welded joints of this new process based on arc force.

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