CN202527829U - Device for controlling residual stress of tungsten inert gas (TIG) welding by applied longitudinal magnetic field - Google Patents
Device for controlling residual stress of tungsten inert gas (TIG) welding by applied longitudinal magnetic field Download PDFInfo
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- CN202527829U CN202527829U CN2012200806758U CN201220080675U CN202527829U CN 202527829 U CN202527829 U CN 202527829U CN 2012200806758 U CN2012200806758 U CN 2012200806758U CN 201220080675 U CN201220080675 U CN 201220080675U CN 202527829 U CN202527829 U CN 202527829U
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- welding
- exciting coil
- residual stress
- magnet exciting
- control voltage
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Abstract
The utility model discloses a device for controlling residual stress of tungsten inert gas (TIG) welding by an applied longitudinal magnetic field, comprising a magnetic-control voltage-stabilized power supplier, a magnet exciting coil, a tungsten electrode, a slide rheostat and an argon tungsten-arc welder which is connected with the tungsten electrode and a workpiece respectively. The device is characterized in that the tungsten electrode is arranged in the magnet exciting coil, the magnet exciting coil is connected with the slide rheostat, the slide rheostat is connected with the magnetic-control voltage-stabilized power supplier and the magnetic-control voltage-stabilized power supplier is connected with the magnet exciting coil. The device has the beneficial effects that the temperature field and the temperature gradient during welding are adjusted by the flexible control over the distribution of arc energy by the applied longitudinal magnetic field and the aims of energy distribution of residual stress at the surface of the welded piece and lowering of the peak of the residual stress of welding are realized.
Description
Technical field
The present invention relates to a kind of welder, relate in particular to a kind of outside Longitudinal Magnetic-field Has control TIG welding residual stress device.
Technical background
Welding has been widely used in each field such as Aero-Space, nuclear energy, boats and ships, drilling at the sea as the important component part of advanced manufacturing technology; Welding Structure also constantly develops towards maximization, precise treatment and high parameter direction; Condition of work is also more and more harsher, especially to the requirement of welding residual stress.Directly reduce the higher tension of bearing capacity, particularly weld metal zone of member owing to residual stress state complicated in the Welding Structure and can impel brittle fracture, also can reduce the stability of member.Therefore, welding stress is carried out deep research and important practical sense is arranged with effectively controlling.
The basic reason of welding residual stress is owing to local heating causes uneven temperature field and thermograde in the welding process.Because in the external dc longitudinal magnetic field effect TIG welding arc process, the electric arc charged particle is done rotation at a high speed under Lorentz force action, the electric arc of rotation drives the circulation stirring movement of liquid metal in the molten bath at a high speed; Not only change mother metal fusing and appearance of weld; Also influence mass transfer and diabatic process in the welding pool liquid metal crystallization process, thereby upset the crystalline orientation of crystal grain, thinning microstructure; Reduce segregation, weld defects such as the mechanical property of raising weld seam and reduction pore crackle.Externally-applied magnetic field changes the radius of turn of electric arc charged particle through Lorentz force simultaneously, thereby causes arc current density, and change has all taken place in the distribution of arc force and energy density.
Summary of the invention
The purpose of this invention is to provide a kind of outside Longitudinal Magnetic-field Has control TIG welding residual stress device; It is controlled arc energy flexibly through the external dc longitudinal magnetic field and distributes; Thereby reach the temperature field and the thermograde of regulating in the welding process, the adjusting of the distribution of realization weldment surface residual stress and the purpose that reduces the residual stress peak value.
The present invention realizes like this; It comprises magnetic control voltage-stabilized power supply, magnet exciting coil, tungsten electrode, slide rheostat, tungsten argon arc welding machine; The tungsten argon arc welding machine connects tungsten electrode and workpiece respectively, it is characterized in that tungsten electrode is placed in the magnet exciting coil, and magnet exciting coil connects slide rheostat; Slide rheostat connects the magnetic control voltage-stabilized power supply, and the magnetic control voltage-stabilized power supply connects magnet exciting coil.Produce stable electric current by the magnetic control voltage-stabilized power supply, supply shaft symmetry open circles column type magnet exciting coil makes it produce required outside Longitudinal Magnetic-field Has and acts on the TIG welding arc.
Beneficial effect of the present invention: control arc energy flexibly through the external dc longitudinal magnetic field and distribute; Thereby reach the temperature field and the thermograde of regulating in the welding process, realize the distribution of weldment surface residual stress and the purpose that reduces the welding residual stress peak value.
Description of drawings
Fig. 1 is a structural representation of the present invention.
The specific embodiment
Below in conjunction with accompanying drawing, introduce the present invention in detail.
As shown in Figure 1; The present invention includes magnetic control voltage-stabilized power supply 1, magnet exciting coil 3, tungsten electrode 4, slide rheostat 2, tungsten argon arc welding machine 5; Tungsten argon arc welding machine 5 connects tungsten electrode 4 and workpiece 6 respectively, it is characterized in that tungsten electrode 4 is placed in the magnet exciting coil 3, and magnet exciting coil connects slide rheostat 2; Slide rheostat connects magnetic control voltage-stabilized power supply 1, and the magnetic control voltage-stabilized power supply connects magnet exciting coil.The magnetic control voltage-stabilized power supply produces stable electric current, and supply shaft symmetry open circles column type magnet exciting coil 3 makes it produce required outside Longitudinal Magnetic-field Has and acts on the TIG welding arc.Thereby regulate size of current through slide rheostat 2 and realize step-less adjustment, so that can in the scope of a broad, change the size of externally-applied magnetic field.
Because in the external dc longitudinal magnetic field effect TIG welding arc process, the electric arc charged particle is done rotation at a high speed under Lorentz force action, electric arc becomes one " hollow " electric arc, and current density becomes bimodal shape to distribute, and has changed temperature field and the thermograde in the welding process.Can control arc energy flexibly through the external dc longitudinal magnetic field and distribute, thereby reach the temperature field and the thermograde of regulating in the welding process, the adjusting of the distribution of realization weldment surface residual stress and the purpose that reduces the residual stress peak value.
Claims (1)
1. an outside Longitudinal Magnetic-field Has is controlled TIG welding residual stress device; It comprises magnetic control voltage-stabilized power supply, magnet exciting coil, tungsten electrode, slide rheostat, tungsten argon arc welding machine; The tungsten argon arc welding machine connects tungsten electrode and workpiece respectively, it is characterized in that tungsten electrode is placed in the magnet exciting coil, and magnet exciting coil connects slide rheostat; Slide rheostat connects the magnetic control voltage-stabilized power supply, and the magnetic control voltage-stabilized power supply connects magnet exciting coil.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012200806758U CN202527829U (en) | 2012-03-06 | 2012-03-06 | Device for controlling residual stress of tungsten inert gas (TIG) welding by applied longitudinal magnetic field |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012200806758U CN202527829U (en) | 2012-03-06 | 2012-03-06 | Device for controlling residual stress of tungsten inert gas (TIG) welding by applied longitudinal magnetic field |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202527829U true CN202527829U (en) | 2012-11-14 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2012200806758U Expired - Fee Related CN202527829U (en) | 2012-03-06 | 2012-03-06 | Device for controlling residual stress of tungsten inert gas (TIG) welding by applied longitudinal magnetic field |
Country Status (1)
| Country | Link |
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| CN (1) | CN202527829U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104588846A (en) * | 2014-12-08 | 2015-05-06 | 沈阳工业大学 | Method and device for increasing TIG welding electric arc energy density |
| CN105798425A (en) * | 2016-03-28 | 2016-07-27 | 南昌航空大学 | System for controlling TIG welding residual stress through additional magnetic field device |
| CN111168198A (en) * | 2020-01-08 | 2020-05-19 | 湘潭大学 | Welding seam tracking sensor for controlling double-tungsten-electrode arc swing by magnetic field |
-
2012
- 2012-03-06 CN CN2012200806758U patent/CN202527829U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104588846A (en) * | 2014-12-08 | 2015-05-06 | 沈阳工业大学 | Method and device for increasing TIG welding electric arc energy density |
| CN105798425A (en) * | 2016-03-28 | 2016-07-27 | 南昌航空大学 | System for controlling TIG welding residual stress through additional magnetic field device |
| CN111168198A (en) * | 2020-01-08 | 2020-05-19 | 湘潭大学 | Welding seam tracking sensor for controlling double-tungsten-electrode arc swing by magnetic field |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20121114 Termination date: 20130306 |