Weld joint deviation identification method, based on waveform matching, of rotating arc narrow gap gas shield welding

A welding seam deviation and rotating arc technology, applied in arc welding equipment, welding equipment, manufacturing tools, etc., can solve the problems of assembly error, failure to involve rotating arc, low machining accuracy, etc., and achieve enhanced anti-interference ability and high reliability. Sexual, reliable results

Inactive Publication Date: 2013-06-12
江苏德川汇汽车科技有限公司
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Problems solved by technology

[0005] During high-speed rotating arc gas shielded welding, the molten metal is restrained by the side wall. At the same time, due to the high deposition rate of the welding wire, the liquid metal in the molten pool is thicker and the liquid level is larger. The arc shape has a special change rule, which makes The application effect of the existing arc sensing method needs to be re-verified, and there are a lot of uncertain factors in the welding process, such as the accumulation of molten iron at the back end of the molten pool, the stirring effect of the arc on the molten pool, low groove process...

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  • Weld joint deviation identification method, based on waveform matching, of rotating arc narrow gap gas shield welding
  • Weld joint deviation identification method, based on waveform matching, of rotating arc narrow gap gas shield welding
  • Weld joint deviation identification method, based on waveform matching, of rotating arc narrow gap gas shield welding

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[0042] In order to deepen the understanding of the present invention, the present invention will be described in further detail below in conjunction with the accompanying drawings and specific embodiments, which are only used to explain the present invention and do not constitute a limitation to the protection scope of the present invention.

[0043] like figure 1 As shown, the welding seam deviation identification system based on the waveform matching-based rotary arc narrow gap gas shielded welding weld deviation identification method of the present invention includes: rotary arc welding torch 1, arc position sensors 2-1, 2-2, welding Arc electric signal sensor 3, welding power supply 4, PC 7, data acquisition card 8, mode selector 9, data preprocessing module 13, waveform template function 14, statistical module 17, polynomial fitting module 20, and appropriately simplified rotating arc gas Welding protection model 21, simulation welding arc electric signal or change of rel...

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Abstract

The invention discloses a weld joint deviation identification method, based on waveform matching, of rotating arc narrow gap gas shield welding. The method comprises the steps of firstly creating waveform function templates of welding eclectic signals or relevant parameters corresponding to different weld joint deviations in a simulation modeling mode or an experimental modeling mode, then adopting an arc electric signal sensor, an arc position sensor, a data acquisition card and the like to collect welding experimental data in an on-line predication mode, extracting arc electric signals during each arc rotating period through a data preprocessing module, matching the arc electric signals with the waveform function templates under different weld deviations obtained during modeling, selecting the weld joint deviation corresponding the most matched template as the welding joint deviation during the current arc rotating period, synthetically considering history values of a plurality of arc rotating periods, so as to overcome the influence of accidental factors, and counting for output. By adopting the method, the capacity of resisting disturbance of the arc sensor can be further improved, and simultaneously overall features of welding current sampled signals are fully considered, so that the deviation extraction result is more reliable.

Description

technical field [0001] The invention belongs to the technical field of welding automatic control, and relates to a weld seam deviation identification method, and more particularly relates to a waveform matching-based rotating arc narrow-gap gas shielded welding weld seam deviation identification method. Background technique [0002] As an efficient welding technology, rotating arc narrow gap gas shielded welding is widely used in the field of medium and thick plate welding. In order to ensure the welding quality and avoid defects such as unfused side walls, it is necessary to ensure that the arc is in the center of the groove during the welding process. Position, that is, real-time and effective tracking control is required, and the key is to be able to reliably extract weld seam deviations in real time. [0003] At present, the online real-time sensing device based on the weld deviation identification method commonly used sensors include mechanical sensors, electromagnetic ...

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Application Information

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IPC IPC(8): B23K9/127B23K9/16
Inventor 黎文航高凯王加友王俭辛杨峰
Owner 江苏德川汇汽车科技有限公司
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