Magnetic field phase control type plasma mag welding device and method

A technology of plasma welding and welding equipment, which is applied in the field of ion MAG welding equipment, can solve problems such as pore defects, affecting the stability of the welding process, etc., and achieve the effects of improving repulsion, welding spatter and welding stability, and improving weld structure

Active Publication Date: 2022-07-29
HARBIN INST OF TECH AT WEIHAI
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Problems solved by technology

However, since the MIGMAW power supply usually uses the pulse mode for welding, the electromagnetic force received by the external magnetic field under a constant magnetic field will change with the change of the pulse current, thereby causing the MIGMAW arc and the plasma arc heat source The periodic change of the spacing affects the stability of the welding process and brings porosity defects

Method used

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  • Magnetic field phase control type plasma mag welding device and method
  • Magnetic field phase control type plasma mag welding device and method
  • Magnetic field phase control type plasma mag welding device and method

Examples

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Embodiment 1

[0020] This example provides a magnetic field phase control plasma MAG welding method, as shown in the appendix figure 1 -Attached image 3 As shown, first, the plasma electrode 1 and the workpiece 6 are respectively connected with the negative electrode and the positive electrode of the plasma power supply to form a conductive path; the MAG welding wire 3 and the workpiece are respectively connected with the positive and negative electrodes of the gas shielded welding power source to form a conductive path to generate a MAG arc 5; The nozzle 2 is used to thermally and mechanically compress the arc generated by the plasma electrode 1 to form a stable plasma arc 7; the protective gas cover 4 is used to ensure that the metal molten pool is not oxidized by the external atmosphere during the welding process; the flat magnetic field is formed by the coil 10, 11. Generate and control the plasma arc 7 and the MAG arc 5 through the conductive coupling arc parts of the magnetic conduct...

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Abstract

The invention relates to a magnetic field phase regulation type plasma MAG welding device and method. The direction of the magnetic field lines of the parallel magnetic field generated by the second coil is perpendicular to the direction of the connection between the plasma arc and the MAG arc. The coils are connected to each other. In the present invention, by adding a horizontal magnetic field perpendicular to the connecting direction of the two arcs, the phase control of the pulsed MAG and the intermittent magnetic field is realized, so that the MAG arc can realize flexible recombination with the plasma arc under the action of the Lorentz force, effectively The repulsion between the two arcs is improved, and the welding spatter and welding stability are significantly improved at the same time; at the same time, the pulsating action of the magnetic field can oscillate and stir the welding pool through the MAG arc to improve the weld structure.

Description

technical field [0001] The invention relates to the technical field of welding, in particular to a magnetic field phase control type plasma MAG welding device and method capable of effectively improving welding stability and reducing porosity defects. Background technique [0002] With the rapid development of the global marine economy, high-end equipment manufacturing technology has gradually become a technical bottleneck restricting the development of my country's manufacturing industry. Welding is one of the key processing technologies in equipment manufacturing, and its importance is of great significance to my country's national economic development and national defense construction. At the same time, the implementation of my country's manufacturing power strategy has prompted related companies to put forward higher requirements for high-end equipment welding manufacturing efficiency and quality, and it is urgent to develop advanced and efficient welding technology, imp...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B23K28/02B23K10/02B23K9/167B23K9/32
CPCB23K28/02B23K10/02B23K9/167B23K9/32
Inventor 张洪涛于江王波
Owner HARBIN INST OF TECH AT WEIHAI
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