Edge micro-plasma arc welding forming control method based on identification of dynamical system

A micro-beam plasma and dynamic system technology, applied in the field of ion welding forming control, to achieve the effect of improving quality reliability and first-time welding pass rate

Active Publication Date: 2016-04-13
TSINGHUA UNIV
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Problems solved by technology

[0006] To sum up, most of the domestic and foreign research on micro-beam plasma welding technology only involves assembly positioning methods and fixture design, off-line optimization of welding process parameters, automatic welding bead

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  • Edge micro-plasma arc welding forming control method based on identification of dynamical system
  • Edge micro-plasma arc welding forming control method based on identification of dynamical system
  • Edge micro-plasma arc welding forming control method based on identification of dynamical system

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[0028] The principle and working process of the present invention will be further described in detail below in conjunction with the drawings and embodiments.

[0029] figure 2 Shown is a schematic diagram of the structure of a micro-beam plasma welding forming control system that implements the method of the present invention. The system includes a monocular coaxial telecentric vision sensor system 1, an image capture card 2, an industrial control computer 3, a plasma welding gun 4, and a pulse Micro-beam plasma welding power supply 5, data acquisition card 6, precision welding workbench 7, Hall current sensor 8, gas flow sensor 9, photoelectric encoder speed sensor 10; the plasma welding gun 4 is connected to the micro-beam plasma through a welding cable The negative electrode of the welding power source 5, the positive electrode of the pulse micro-beam plasma welding power source 5 is connected to the weldment through the Hall current sensor 8 through a welding cable; the monoc...

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Abstract

The invention provides an edge micro-plasma arc welding forming control method based on identification of a dynamical system and belongs to the technical field of welding quality control. Aiming to solve the problems of unstable welding process and non-uniform weld forming caused by energy parameter fluctuation, heat dissipation condition change and the like in a thin-walled edge joint pulsed micro-plasma arc welding process, the method adopts a molten pool vision sensing technology for extraction of front transient image characteristics of a molten pool, adopts an Elman dynamical recurrent neural network for off-line system identification in the thin-walled edge joint pulsed micro-plasma arc welding dynamic process and realizes on-line control of mushroom weld forming in the thin-walled edge joint pulsed micro-plasma arc welding process through real-time adjustment of welding process parameters. The edge micro-plasma arc welding forming control method can improve the quality reliability of welded products and increase the one-time welding qualification rate, can be applied to an edge joint pulsed micro-plasma arc welding process for thin-walled metal precision components in the fields of aerospace manufacture and the like and is particularly applicable to precision welding occasions for elastic components such as ultra-thin-walled capsules, bellows and the like.

Description

technical field [0001] The invention belongs to the technical field of welding quality control, and relates to a method for controlling the formation of end-connected micro-beam plasma welding based on dynamic system off-line identification, which can be widely used in the process of end-connected micro-beam plasma welding of thin-walled metal precision components in aerospace manufacturing and other fields middle. Background technique [0002] Thin-walled metal precision components are an indispensable and important component in high-end equipment manufacturing fields such as aerospace, military weapons, nuclear industry, medical equipment and biomedicine, and have strict requirements on weld quality and joint mechanical properties. Pulsed Micro-plasma Arc Welding (P-MPAW, Pulsed Micro-plasma Arc Welding) has the advantages of concentrated energy density, narrow heat-affected zone, high arc stability and precise control of heat input. An important welding and forming manuf...

Claims

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Application Information

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IPC IPC(8): B23K10/02
CPCB23K10/02
Inventor 洪宇翔都东常保华曾锦乐常树鹤王力潘际銮
Owner TSINGHUA UNIV
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