Composite high-frequency pulse welding system and process

A composite pulse and high-frequency pulse technology, applied in welding equipment, manufacturing tools, arc welding equipment, etc., can solve problems such as the influence of high-power high-frequency signal transmission, and achieve the effect of stable work

Inactive Publication Date: 2011-10-19
BEIJING UNIV OF TECH
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Problems solved by technology

In addition, the parasitic parameters of the circuit in the transmission loop have a great influence on the transmission of high-power hig

Method used

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  • Composite high-frequency pulse welding system and process
  • Composite high-frequency pulse welding system and process
  • Composite high-frequency pulse welding system and process

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Embodiment Construction

[0018] The specific implementation method of the present invention is: before the welding starts, the parameters of the welding power source A and the composite pulse power source B should be set respectively. The parameters of welding power source A are set according to the welding material, material thickness, number of weld passes and welding speed, and the welding waveform, arc start / stop current and start / stop time can be determined according to the rules when welding power source A is used alone, while the welding current When DC waveform welding is selected, it is set to 70% of the current value when welding power source A is welding alone, and when AC waveform welding is selected, it is set to 80% of the current value when welding power source A is welding alone. When welding carbon steel and stainless steel, in order to improve arc efficiency and reduce tungsten electrode burning loss, DC positive wave welding is used; when welding aluminum alloy, AC wave welding is us...

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Abstract

The invention relates to a composite high-frequency pulse welding system and process, belonging to the field of electric arc welding. The system comprises a welding power supply A, a composite pulse power supply B and a composite welding gun C, wherein a TIG (Tungsten Inert Gas Welding) power supply is selected to serve as the welding power supply A; the composite pulse power supply B consists of three parts, a composite pulse power supply power part B1, a high-frequency pulse generator B2 and a composite pulse power supply control system B3; B1 is realized by utilizing a switching power supply; B2 comprises a full bridge topological circuit, a full bridge drive circuit, a full bridge rectification circuit and a current sensor LEM2; B3 comprises a digital signal processor, a sampling processing circuit, a state judging circuit, a protective signal circuit and a current sensor LEM3; and B1 is connected with B2, B2 and A are connected with the two ends of C in parallel and simultaneously output power to C. According to the composite high-frequency pulse welding system and process, disclosed by the invention, the work is table, a randomly adjustable composite high-frequency pulse welding process with a pulse amplitude within 200A, a pulse frequency of 20-100kHz and a duty ratio of 20-80% can be realized, a welding seam structure can be effectively thinned and the number of welding seam air holes can be reduced.

Description

technical field [0001] The invention relates to a composite high-frequency pulse welding system and technology, belonging to the field of welding equipment and arc welding technology control. Background technique [0002] Tungsten argon arc welding (TIG) is widely used in aerospace, automobile, pipeline and other fields due to its strong adaptability and good welding quality. According to the different materials to be welded, the TIG welding process is divided into DC TIG welding, AC TIG welding and variable polarity TIG welding. Among them, DC TIG welding is used for welding stainless steel, copper and other metals, while AC TIG welding and variable polarity TIG welding It is used for welding of aluminum alloy materials. Due to the shortcomings of TIG welding such as low arc efficiency, slow welding speed and unstable low current arc, pulse TIG welding came into being. The frequency range used by pulsed TIG welding is currently concentrated in two areas: one is the low-fr...

Claims

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Application Information

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IPC IPC(8): B23K9/09
Inventor 宋永伦闫思博白立来
Owner BEIJING UNIV OF TECH
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