CN113732458A - Arc magnetic rotation control welding method for consumable electrode stranded wire - Google Patents
Arc magnetic rotation control welding method for consumable electrode stranded wire Download PDFInfo
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- CN113732458A CN113732458A CN202110904787.4A CN202110904787A CN113732458A CN 113732458 A CN113732458 A CN 113732458A CN 202110904787 A CN202110904787 A CN 202110904787A CN 113732458 A CN113732458 A CN 113732458A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K9/00—Arc welding or cutting
- B23K9/16—Arc welding or cutting making use of shielding gas
- B23K9/173—Arc welding or cutting making use of shielding gas and of a consumable electrode
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K9/00—Arc welding or cutting
- B23K9/095—Monitoring or automatic control of welding parameters
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K9/00—Arc welding or cutting
- B23K9/32—Accessories
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Abstract
An arc magnetic rotation control welding method for a consumable electrode stranded wire. When the wire twisting welding in the prior art is used for high-current welding, pores are easily generated in the welding line, and meanwhile, too high heat input can cause the change of the structure and the performance of a joint area, such as the growth of crystal grains in the welding line area, the reduction of mechanical properties such as the plasticity, the toughness and the like of the joint and the like. The invention comprises the following components: the welding spot of the welding pole arc of the skein welding is centered on the welding spot of the welding pole arc of the skein welding, a coaxial coil is additionally arranged around the welding spot, direct current is introduced into the coaxial coil to form a longitudinal magnetic field, the force application direction of the longitudinal magnetic field to the skein welding arc is consistent with the self-rotation direction of the skein welding arc and opposite to the skein twisting direction of the skein, the longitudinal magnetic field direction is controlled by the direction of the direct current, and the rotation angular speed of the skein welding arc is quickly improved under the influence of Lorentz force while the skein is melted to release the self-twisting angle formed by the skein welding arc, so that the high-speed directional rotation of the skein welding arc is realized. The invention is used for the consumable electrode stranded wire electric arc magnetic rotation control welding method.
Description
Technical Field
The invention relates to the technical field of consumable electrode wire-stranding arc welding head quality control, in particular to a consumable electrode wire-stranding arc magnetic rotation control welding method.
Background
The multi-strand twisted welding wire is a consumable electrode welding material with a novel structure, the concept of the multi-strand twisted welding wire is firstly proposed by the high-top professor of the university of the Chinese mining industry in 2009, the manufacturing method is that single wires are twisted into spiral multi-strand wires, compared with the common welding wire, the multi-strand twisted welding wire structure can adopt the combination of the single wires with different diameters or numbers, the components can be precisely controlled through the single wires with different components and numbers, especially in the aspect of the physical welding characteristics, the multi-strand twisted wires can form multi-spot current conduction during welding, the conduction form of the electric arc is more favorable for improving the distribution of electric arc energy and the uniform transition of molten drops, so the stability of the welding process can be better kept under higher current, and the projecting technical advantages of higher deposition rate, easy realization of shape control and controllability and the like are achieved; at present, when the strand welding in the prior art is carried out in high-current welding, a large amount of air hole defects are easily generated in the welding seam, and meanwhile, the problems of structural and performance changes of a joint area, such as growth of crystal grains in the welding seam area, reduction of mechanical properties such as joint plasticity, toughness and the like, and the like can not be effectively solved at present.
Disclosure of Invention
The invention aims to provide a consumable electrode twisted wire electric arc magnetic rotation control welding method, which takes a twisted wire welding consumable electrode electric arc welding spot as a center and is additionally provided with a coaxial coil at the periphery, thereby effectively improving the technical defects of internal air holes, joint performance and the like of the twisted wire welding and realizing the purpose of further regulating and controlling the structural form of a welding seam and the joint performance.
The above purpose is realized by the following technical scheme:
a consumable electrode stranded wire arc magnetic rotation control welding method comprises the following steps: the welding spot of the stranded wire welding consumable electrode arc is characterized in that: taking the welding spot of the welding electrode arc of the stranded wire welding as the center, arranging a coaxial coil around the welding spot, and introducing direct current into the coaxial coil to form a longitudinal magnetic field, wherein the force application direction of the longitudinal magnetic field to the stranded wire welding arc is consistent with the self-rotation direction of the stranded wire welding arc and opposite to the stranding direction of the stranded wire, and the direction of the longitudinal magnetic field is controlled by the direction of the direct current;
the wire twisting welding arc is in a longitudinal magnetic field, and when the wire twisting is melted to form self twisting angle release, the rotation angular speed of the wire twisting welding arc is quickly improved under the influence of Lorentz force, so that the high-speed directional rotation of the wire twisting welding arc is realized;
the wire-twisting welding electric arc is controlled by combining welding current of 100-260A, welding voltage of 15-30V, frequency of 0-200Hz, proportion of 20-100 percent and process parameters in high-speed directional rotation, the stirring force of the molten pool is increased, so that the molten pool generates directional rotation flow, dendrites are crushed into isometric crystals in the solidification process, and the grains are refined.
The consumable electrode stranded wire electric arc magnetic rotation control welding method comprises the following process parameters: the welding speed of the welded object 5A06 aluminum alloy is 0.6m/min, the welding voltage is 26V, and the wire feeding speed is 11 m/min.
According to the consumable electrode stranded wire electric arc magnetic rotation control welding method, a magnetic core is arranged in the coaxial coil, the overall size outer diameter is 40mm-150mm, the inner diameter is 30mm-140mm, the width is 4mm-50mm, the number of turns of the coil is 50-2000 turns, the direct current is 0-10A, and the coaxial coil can be replaced by a permanent magnet.
Has the advantages that:
1. the invention relates to a consumable electrode twisted wire arc magnetic rotation control welding method, which is characterized in that a longitudinal magnetic field is additionally arranged around an arc welding point of a consumable electrode of twisted wire welding, the self-rotation angular velocity of the twisted wire welding arc is rapidly increased by utilizing the Lorentz force, the stirring force on a molten pool can be greatly increased by the high-speed directional rotation of the twisted wire welding arc, so that the molten pool generates directional rotation flow, thereby the effect of refining crystal grains can be realized, and dendritic crystals can be crushed into isometric crystals in the solidification process, so that the effects of homogenizing the crystal grains, improving the isotropy of the crystal grains, reducing segregation and the like are achieved, and the mechanical properties of the welded joint, such as plasticity, toughness and the like, are enhanced.
2. The invention also adopts electric arc stirring, which can improve the heat transfer and mass transfer speed in the molten pool, thereby delaying the solidification speed at the bottom of the molten pool in the aspects of crystallization temperature, nucleation condition and the like, and effectively separating out the gas in the molten pool by the convection and stirring action of the electric arc stirring on the molten pool, thereby reducing the generation tendency of process type pores.
3. The invention can adjust the directional rotation speed of the arc of the twisted wire welding through the control of the magnetic field intensity, can effectively improve the stability of the arc of the twisted wire welding after the arc of the twisted wire welding rotates directionally at a high speed, can obviously shorten the arc length of the twisted wire welding, improve the electric field intensity of the arc, and increase the transition frequency of the molten drop, so that the impact effect of a single molten drop on a molten pool is smaller, therefore, the invention can also effectively reduce welding spatter during high-current welding, make the welding process more stable, and effectively improve the deposition rate.
4. The invention can effectively adjust the distribution condition of the thermal field in the electric arc heat source of the stranded wire welding, and the heat flow distribution in the electric arc heat source is more uniform, so that the surface of a molten pool can be heated more uniformly, the thermal field distribution gradient of the molten pool is smaller, the welding seam form after crystallization is obviously changed, and the welding seam performance is also improved to a certain extent.
5. The method can effectively solve the problems of air hole defect, large crystal grains, reduced joint performance and the like when the stranded wire is welded in high-current welding, so that the potential technical advantages of the stranded wire welding method can be further improved.
Description of the drawings:
FIG. 1 is a schematic structural diagram of the present invention.
FIG. 2 is a cross-sectional view of a weld seam of a strand weld of the present invention.
FIG. 3 is a cross-sectional view of a weld of a conventional strand welding.
FIG. 4 is an X-ray view of a weld seam of the strand weld of the present invention.
FIG. 5 is an X-ray view of a weld of a conventional strand welding.
FIG. 6 is a metallographic representation of the weld zone of the strand weld of the present invention.
FIG. 7 is a metallographic representation of the weld of a conventional strand weld.
The specific implementation mode is as follows:
example 1:
a consumable electrode stranded wire arc magnetic rotation control welding method comprises the following steps: the welding spot of the stranded wire welding consumable electrode arc is characterized in that: taking the welding spot of the welding electrode arc of the stranded wire welding as the center, arranging a coaxial coil around the welding spot, and introducing direct current into the coaxial coil to form a longitudinal magnetic field, wherein the force application direction of the longitudinal magnetic field to the stranded wire welding arc is consistent with the self-rotation direction of the stranded wire welding arc and opposite to the stranding direction of the stranded wire, and the direction of the longitudinal magnetic field is controlled by the direction of the direct current;
the wire twisting welding arc is in a longitudinal magnetic field, and when the wire twisting is melted to form self twisting angle release, the rotation angular speed of the wire twisting welding arc is quickly improved under the influence of Lorentz force, so that the high-speed directional rotation of the wire twisting welding arc is realized;
the wire-twisting welding electric arc is controlled by combining welding current of 100-260A, welding voltage of 15-30V, frequency of 0-200Hz, proportion of 20-100 percent and process parameters in high-speed directional rotation, the stirring force of the molten pool is increased, so that the molten pool generates directional rotation flow, dendrites are crushed into isometric crystals in the solidification process, and the grains are refined.
Example 2:
according to the consumable electrode stranded wire arc magnetic rotation control welding method of the embodiment 1, the process parameters are as follows: the welding speed of the welded object 5A06 aluminum alloy is 0.6m/min, the welding voltage is 26V, and the wire feeding speed is 11 m/min.
Example 3:
according to the consumable electrode stranded wire arc magnetic rotation control welding method of the embodiment 2, the coaxial coil is internally provided with the magnetic core, the overall size outer diameter is 40mm-150mm, the inner diameter is 30mm-140mm, the width is 4mm-50mm, the number of turns of the coil is 50-2000 turns, the direct current is 0-10A, and the coaxial coil can be replaced by a permanent magnet.
Under the same welding process conditions, a comparative test is carried out on the consumable electrode wire-stranding arc magnetic spin control welding and the conventional consumable electrode wire-stranding welding, and the actual welding process parameters and the comparative test result are as follows:
the results of the comparative tests are as follows:
(1) the comparison results of the welding seam cross section of the application and the conventional strand welding are shown in the attached drawings 2 and 3, and the observation shows that:
1) the bottom of the welding seam obtained by the welding method is formed into a smooth arc shape, and the bottom of the welding seam obtained by conventional strand welding has an obvious bulge, which shows that the heat source formed by the welding method is more uniformly distributed, and the heat distribution gradient of the heat field in the central area of the molten pool is smaller;
2) the depth-to-width ratio of the welding seam obtained by the welding method is larger, is improved by about 18.37% compared with the conventional strand welding, and meanwhile, the weld fusion width is smaller, is reduced by about 26.23% compared with the conventional strand welding, so that the heat source formed by the welding method is more concentrated in distribution, and the binding effect on the strand electric arc is better;
3) from the view of the section air holes, no air holes can be observed in the section of the welding seam obtained by the welding method, and obvious process air holes exist in the section of the welding seam of the conventional strand welding, which shows that the welding method has a good effect of inhibiting the defects of the air holes.
(2) The comparison results of the porosity of the weld joint between the wire electrode and the conventional stranded wire welding are shown in the attached drawings 4 and 5, and the observation shows that: obvious process air holes cannot be observed in the welding seam obtained by the welding method, and more air holes can be observed in the welding seam obtained by conventional wire twisting welding, so that the welding method has a better inhibition effect on air hole defects.
(3) The comparison results of the metallographic structure of the weld joint area of the welding method with the metallographic structure of the weld joint area of the conventional strand welding are shown in the attached drawings 6 and 7, and the observation shows that the metallographic structure of the weld joint area obtained by the welding method has an obvious refining effect and a certain homogenization effect compared with the metallographic structure of the weld joint area of the conventional strand welding.
Claims (3)
1. A consumable electrode stranded wire arc magnetic rotation control welding method comprises the following steps: the welding spot of the stranded wire welding consumable electrode arc is characterized in that: taking the welding spot of the welding electrode arc of the stranded wire welding as the center, arranging a coaxial coil around the welding spot, and introducing direct current into the coaxial coil to form a longitudinal magnetic field, wherein the force application direction of the longitudinal magnetic field to the stranded wire welding arc is consistent with the self-rotation direction of the stranded wire welding arc and opposite to the stranding direction of the stranded wire, and the direction of the longitudinal magnetic field is controlled by the direction of the direct current;
the wire twisting welding arc is in a longitudinal magnetic field, and when the wire twisting is melted to form self twisting angle release, the rotation angular speed of the wire twisting welding arc is quickly improved under the influence of Lorentz force, so that the high-speed directional rotation of the wire twisting welding arc is realized;
the wire-twisting welding electric arc is controlled by combining welding current of 100-260A, welding voltage of 15-30V, frequency of 0-200Hz, proportion of 20-100 percent and process parameters in high-speed directional rotation, the stirring force of the molten pool is increased, so that the molten pool generates directional rotation flow, dendrites are crushed into isometric crystals in the solidification process, and the grains are refined.
2. The consumable electrode stranded wire arc magnetic rotation control welding method as set forth in claim 1, wherein: the process parameters are as follows: the welding speed of the welded object 5A06 aluminum alloy is 0.6m/min, the welding voltage is 26V, and the wire feeding speed is 11 m/min.
3. The consumable electrode stranded wire arc magnetic rotation control welding method according to claim 2, characterized in that: the coaxial coil is internally provided with a magnetic core, the overall size outer diameter is 40mm-150mm, the inner diameter is 30mm-140mm, the width is 4mm-50mm, the number of turns of the coil is 50-2000 turns, the direct current is 0-10A, and the coaxial coil can be replaced by a permanent magnet.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110904787.4A CN113732458A (en) | 2021-08-07 | 2021-08-07 | Arc magnetic rotation control welding method for consumable electrode stranded wire |
| PCT/CN2022/109579 WO2023016295A1 (en) | 2021-08-07 | 2022-08-02 | Consumable electrode twisted wire arc magnetic spin control welding method |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202110904787.4A CN113732458A (en) | 2021-08-07 | 2021-08-07 | Arc magnetic rotation control welding method for consumable electrode stranded wire |
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| CN113732458A true CN113732458A (en) | 2021-12-03 |
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| CN202110904787.4A Pending CN113732458A (en) | 2021-08-07 | 2021-08-07 | Arc magnetic rotation control welding method for consumable electrode stranded wire |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| WO2023016295A1 (en) * | 2021-08-07 | 2023-02-16 | 哈尔滨焊接研究院有限公司 | Consumable electrode twisted wire arc magnetic spin control welding method |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| JP4224196B2 (en) * | 2000-10-17 | 2009-02-12 | 新日本製鐵株式会社 | Multi-electrode submerged arc welding method with excellent weld bead shape |
| CN101143401B (en) * | 2007-10-19 | 2010-10-20 | 重庆大学 | Moderate and high strength large-thickness component narrow gap or ultra-narrow gap magnetic control jet molten welding method |
| CN100532000C (en) * | 2007-12-07 | 2009-08-26 | 北京工业大学 | Laser electrical arc complex welding method for intensifying current magnetohydrodynamics effect |
| CN102933344B (en) * | 2010-06-02 | 2015-02-25 | 本田技研工业株式会社 | Arc welding method, arc welding device and arc welding magnetic field strength adjustment method |
| CN102848058B (en) * | 2011-06-30 | 2015-10-28 | 宝山钢铁股份有限公司 | The method and apparatus of pulsed magnetic field refinement seam organization is used in welding process |
| CN102615391A (en) * | 2012-04-12 | 2012-08-01 | 时振 | Multi-wire rotating arc welding |
| CN113732458A (en) * | 2021-08-07 | 2021-12-03 | 哈尔滨焊接研究院有限公司 | Arc magnetic rotation control welding method for consumable electrode stranded wire |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| WO2023016295A1 (en) * | 2021-08-07 | 2023-02-16 | 哈尔滨焊接研究院有限公司 | Consumable electrode twisted wire arc magnetic spin control welding method |
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