CN113857623A - Magnetic control swinging arc magnetic circuit device for ferromagnetic steel GTAW narrow gap welding and application - Google Patents
Magnetic control swinging arc magnetic circuit device for ferromagnetic steel GTAW narrow gap welding and application Download PDFInfo
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- CN113857623A CN113857623A CN202111000615.0A CN202111000615A CN113857623A CN 113857623 A CN113857623 A CN 113857623A CN 202111000615 A CN202111000615 A CN 202111000615A CN 113857623 A CN113857623 A CN 113857623A
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- magnetic circuit
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- narrow gap
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- 230000005291 magnetic effect Effects 0.000 title claims abstract description 120
- 238000003466 welding Methods 0.000 title claims abstract description 47
- 230000005294 ferromagnetic effect Effects 0.000 title claims abstract description 31
- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 22
- 239000010959 steel Substances 0.000 title claims abstract description 22
- 238000010891 electric arc Methods 0.000 claims abstract description 19
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical group [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims abstract description 16
- 230000005284 excitation Effects 0.000 claims abstract description 15
- WFKWXMTUELFFGS-UHFFFAOYSA-N tungsten Chemical compound [W] WFKWXMTUELFFGS-UHFFFAOYSA-N 0.000 claims abstract description 14
- 229910052721 tungsten Inorganic materials 0.000 claims abstract description 14
- 239000010937 tungsten Substances 0.000 claims abstract description 14
- 238000000034 method Methods 0.000 claims abstract description 12
- 230000005389 magnetism Effects 0.000 claims abstract description 3
- 229910052751 metal Inorganic materials 0.000 claims description 8
- 239000002184 metal Substances 0.000 claims description 8
- 239000000696 magnetic material Substances 0.000 claims description 3
- 229910000976 Electrical steel Inorganic materials 0.000 claims description 2
- 239000003302 ferromagnetic material Substances 0.000 claims description 2
- 230000006698 induction Effects 0.000 claims description 2
- 229910052742 iron Inorganic materials 0.000 claims description 2
- 230000007704 transition Effects 0.000 claims 2
- 230000007547 defect Effects 0.000 abstract description 3
- 239000007789 gas Substances 0.000 description 8
- 230000004927 fusion Effects 0.000 description 5
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 description 4
- 229910000975 Carbon steel Inorganic materials 0.000 description 2
- 229910052786 argon Inorganic materials 0.000 description 2
- 239000010962 carbon steel Substances 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000001965 increasing effect Effects 0.000 description 2
- 230000000977 initiatory effect Effects 0.000 description 2
- 239000007769 metal material Substances 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 229910001069 Ti alloy Inorganic materials 0.000 description 1
- 229910000963 austenitic stainless steel Inorganic materials 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000001939 inductive effect Effects 0.000 description 1
- 229910001105 martensitic stainless steel Inorganic materials 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000007670 refining Methods 0.000 description 1
- 238000009941 weaving Methods 0.000 description 1
- 238000004804 winding Methods 0.000 description 1
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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
- B23K9/08—Arrangements or circuits for magnetic control of the arc
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Plasma & Fusion (AREA)
- Mechanical Engineering (AREA)
- Arc Welding Control (AREA)
Abstract
The invention discloses a magnetic control swing arc magnetic circuit device for ferromagnetic steel GTAW narrow gap welding, which is characterized by comprising an excitation coil, an excitation power supply, an iron core, a magnetic pole and a welding gun tungsten pole. For guaranteeing that the regional magnetic line of force of electric arc is not attracted by the magnetism lateral wall, adopt "gate-type" of little air gap interval to contain the design of air gap magnetic circuit, the magnetic circuit corner all adopts the design of radius angle to reduce the magnetic leakage, guarantees the regional sufficient magnetic field intensity of electric arc to in the narrow gap welding process of magnetic steel, electric arc can obtain effectual deflection, improves electric arc energy distribution, can solve the not defect of fusing, thereby the crack that even molten bath temperature field suppressed the thick plate welding in-process is sprouted.
Description
Background
In the narrow gap welding process of ferromagnetic steel (such as martensitic stainless steel and high-strength steel), if the traditional TIG welding is adopted, errors can be generated due to the position centering of a tungsten electrode, so that magnetic blow is caused to deflect electric arcs to metal on one side, and the phenomenon of non-fusion occurs on the other side, so that defects are generated, and the welding seam performance is reduced. The magnetic control swing electric arc can solve the problem of non-fusion, and can reduce the temperature gradient to inhibit crack initiation of thick plate welding. At present, magnetron weaving arc welding is mainly used for welding of nonmagnetic materials such as titanium alloy and austenitic stainless steel. On the other hand, due to the attraction of the magnetic side walls to the magnetic field inducing arc swing, the arc swing magnetic pole design suitable for non-magnetic material steel is difficult to realize the effective swing of the GTAW welding arc in the magnetic slope even if the excitation current or the number of turns of the excitation coil is increased.
Therefore, it would be of great significance to provide a magnetic circuit device capable of realizing effective swing of the arc in the narrow gap slope of ferromagnetic steel so as to realize magnetic control swing arc GTAW narrow gap welding of ferromagnetic steel.
Disclosure of Invention
The utility model provides a main aim at provides the effective wobbling magnetic circuit design of electric arc in the ferromagnetic steel narrow gap slope to satisfy the effective swing of electric arc, can solve the bad problem of magnetism groove lateral wall fusion.
In order to achieve the above object, on one hand, the invention adopts the following technical scheme:
the magnetic control swinging arc magnetic circuit device for the ferromagnetic steel GTAW narrow gap welding is characterized in that: the magnetic generator includes exciting coil, exciting power supply, iron core and magnetic poles. The magnetic field is generated by the exciting current generated by an external exciting power supply, and the magnetic lines of force are conducted to the arc area through the magnetic poles.
Preferably, the magnetic circuit conducting part is a core and a first magnetic pole and a second magnetic pole, and the two magnetic poles are fixed with the core through threaded connection.
Preferably, the magnetic circuit shape adopts an integrated door-like gap-containing magnetic circuit, so that the continuity of the magnetic circuit conduction in the magnetic circuit is ensured, the height of the magnetic circuit is 210-260mm, and the width is 120-180 mm; the width of the air gap is 18-25mm, so as to ensure that magnetic lines of force are not attracted by the side wall of the ferromagnetic groove and generate magnetic induction intensity required by arc deflection; and/or
Preferably, the corners of the magnetic circuit are designed to be rounded to prevent magnetic leakage, and the radius of the rounded corner is 5-10 mm; and/or the presence of a gas in the gas,
preferably, the magnetic pole end adopts a fillet end to prevent magnetic leakage, and the radius of the fillet is 5-8 mm; and/or the presence of a gas in the gas,
preferably, the excitation coil is a single coil, the coil is formed by winding a copper enameled wire with the wire diameter of 1.2mm, and the number of turns is 600-900; and/or the presence of a gas in the gas,
preferably, the iron core is made of silicon steel sheets, and the thickness of the iron core is 5-8 mm; and/or the presence of a gas in the gas,
preferably, the iron core is connected and fixed with the coil support frame in an interference fit manner;
preferably, the magnetic pole adopts soft magnetic material DT4C electrical iron, and ensures that the magnetic pole has certain rigidity without being disturbed and deformed by ferromagnetic side walls, and the thickness is equivalent to the total thickness of the iron core.
On the other hand, the magnetic circuit device for the magnetic control swing arc in the ferromagnetic metal narrow gap slope adopts the following technical scheme:
preferably, the tip of the tungsten electrode extends out of the air gap and is 0-5 mm away from the lower end face of the magnetic pole; and/or
Preferably, the excitation current is 0-6A, and the excitation frequency is 1-15 Hz; and/or
The invention provides a use method of a magnetic pole device of a magnetic control swinging electric arc in a ferromagnetic metal narrow gap slope, which comprises the following steps:
the method comprises the following steps: the magnetic circuit device is matched with the welding gun to ensure that the air gap of the magnetic circuit is symmetrical about the central axis of the tungsten electrode;
step two: before carrying out narrow-gap magnetic control swing arc welding on a ferromagnetic material, checking whether a magnetic control coil can be normally started or not, and then placing a plate to be welded at a proper position;
step three: turning on a power supply of the magnetic control coil to enable the magnetic control coil to work normally;
step four: starting an arc striking button to strike an arc and matching with wire feeding, and starting arc swinging narrow gap welding on the ferromagnetic narrow gap groove;
step five: after the arc extinguishing operation is completed, the electromagnetic coil switch is closed after a short period of time, and the welding of the magnetic control swinging arc in the ferromagnetic narrow-gap slope is finished.
The magnetic circuit device for the magnetic control GTAW swinging electric arc in the narrow gap groove of the ferromagnetic metal utilizes a small-gap magnetic circuit and a rounded magnetic circuit corner design mode to converge magnetic lines of force so as to ensure that an electric arc area in the magnetic groove has enough magnetic field intensity, thereby effectively deflecting the electric arc, increasing the energy of the inner side wall of the narrow gap groove so as to solve the unfused defect, and utilizing the swinging electric arc to act on a molten pool to achieve the effects of refining a uniform temperature field of crystal grains and preventing the initiation of welding cracks.
Drawings
Fig. 1 shows a schematic structural diagram in the welding of ferromagnetic steel according to the present invention.
Fig. 2 shows an isometric view of the magnetic circuit structure.
Fig. 3 shows a three-view and an isometric view of a magnetic pole in the magnetic circuit structure.
Fig. 4 shows a high-speed photographic image of the arc swinging to the left, no swing, and to the right in the groove of the narrow-gap ferromagnetic steel.
In the figure, 1, a field coil; 2. an excitation power supply; 3. an iron core; 4. a first magnetic pole; 5. a ferromagnetic metal material slope; 6. welding a tungsten electrode; 7. a second magnetic pole; r1, fillet 1; r2, fillet 2; d. the width of the air gap.
Detailed Description
The invention is illustrated below based on examples, and unless the context clearly requires otherwise, throughout the description and the claims, the words "comprise", "comprising", and the like are to be construed in an inclusive sense as opposed to an "exclusive" or "exhaustive" sense; that is, the meaning of "includes but is not limited to".
These drawings are simplified schematic views illustrating only the basic structure of the present invention in a schematic manner, and thus show only the constitution related to the present invention.
Exemplary embodiments of the present invention will now be described below with reference to the accompanying drawings. The described exemplary embodiments are intended to aid in the understanding of the present invention and are not intended to limit the scope of the invention in any way.
Referring to fig. 1, the magnetic circuit device of the magnetic swing arc for ferromagnetic steel GTAW narrow gap welding provided by the invention comprises 1, an excitation coil; 2. an excitation power supply; 3. an iron core; 4. a first magnetic pole; 5. beveling a ferromagnetic metal material; 6. welding a tungsten electrode; 7. a second magnetic pole. The whole magnetic circuit is symmetrically distributed about the tungsten pole. In the ferromagnetic narrow gap welding process, when the excitation coil 1 is electrified with excitation current provided by the excitation power supply 2, the direction of a magnetic field generated by the first magnetic pole 4 and the second magnetic pole 7 is vertical to the axial direction of the tungsten pole and is parallel to the direction of a welding seam, so that an electric arc deflects to metal side walls at two sides in the welding process. The alternating current is introduced to generate a magnetic field with continuously changed direction, so that the electric arc deflects to the metal side walls on different sides, the magnetic blow of the electric arc is eliminated under the action of a forced magnetic field, and meanwhile, the melted welding wire forms good fusion on the side walls under the action of the swinging electric arc, so that the poor fusion of the side walls of the magnetic groove is well solved, and the weld forming in the narrow-gap welding process is improved.
In order to verify the effect of the magnetic circuit device of the magnetic control swing arc for ferromagnetic steel GTAW narrow gap welding, the dynamic behavior of the arc is shot.
Example 1:
in a ferromagnetic steel Q345b carbon steel narrow gap groove with the thickness of 20mm, the swinging condition of the electric arc is observed, a square seamless narrow gap groove is adopted, the width of the groove is 10mm, the truncated edge is 5mm, the welding current is 160A, and the height of a tungsten electrode is 3 mm. The welding speed is 3mm/s, the exciting current is 2.4A, the exciting frequency is 4Hz, the whole welding process is protected by pure argon, and the argon flow is 15L/min. The tip of the tungsten electrode 6 extends out of the lower end faces of the first magnetic pole 4 and the second magnetic pole 7 by 3mm and is matched with relevant welding parameters. As shown in fig. 4, a significant deflection of the arc was seen under the Q345b carbon steel magnetic bevel and allowed the arc to deflect onto the metal sidewalls on both sides.
Finally, it should be noted that: obviously, the above examples are only for clearly illustrating the present invention and are not to be construed as limiting the embodiments; it will be apparent to those skilled in the art that other variations and modifications may be made in the foregoing disclosure without departing from the spirit or essential characteristics of the invention, and it is not desired to exhaustively enumerate all embodiments, but rather those variations and modifications are within the scope of the invention as broadly claimed.
Claims (6)
1. A magnetic circuit device of magnetic control swing arc for ferromagnetic steel GTAW narrow gap welding is characterized by comprising an excitation coil, an excitation power supply, an iron core, a magnetic conduction magnetic pole and a welding gun tungsten pole. The magnetic circuit wholly adopts "gate-type" magnetic circuit that contains little air gap, and the magnetic circuit corner all adopts the radius transition, and the magnetic head tip of magnetic pole still adopts the radius transition to prevent the magnetic leakage and can produce the magnetic induction intensity that satisfies the electric arc deflection in the magnetism groove, thereby make electric arc deflect to the lateral wall in the narrow clearance slope of ferromagnetic metal in welding process.
Wherein: the magnetic circuit is 210-260mm high, 120-180mm wide and 5-8mm thick; and/or
The number of turns of the exciting coil is 600-; and/or
The fillet at the corner of the magnetic circuit is 5-10 mm; and/or
The end part of the magnetic pole is rounded by 5-8 mmm; and/or
The width of the air gap is 18-25 mm; and/or.
2. The magnetic circuit device of magnetically controlled oscillating arc of ferromagnetic steel GTAW narrow gap welding as claimed in claim 1, wherein the iron core is connected and fixed with the coil supporting frame in interference fit.
3. The magnetic circuit device of magnetically controlled oscillating arc of ferromagnetic steel GTAW narrow gap welding as claimed in claim 1, wherein said iron core is made of silicon steel sheet.
4. A magnetic circuit device of magnetically controlled oscillating arc for magnetic steel GTAW narrow gap welding according to claim 1, wherein said magnetic pole is made of soft magnetic material DT4C electric iron.
5. The magnetic circuit device of magnetic controlled swinging arc of ferromagnetic steel GTAW narrow gap welding as claimed in claim 1, wherein the iron core and the magnetic pole are in interference fit and fit with each other by a nut; the tungsten electrode of the welding gun is fixed with the magnetic circuit device through a special fixture, and the tungsten electrode is arranged on the central symmetrical axis of the magnetic circuit.
6. The use method of the magnetic circuit device of magnetic swing arc for ferromagnetic steel GTAW narrow gap welding according to claim 1 is characterized by comprising the following steps:
the method comprises the following steps: the magnetic circuit device is matched with the welding gun to ensure that the air gap of the magnetic circuit is symmetrical about the central axis of the tungsten electrode;
step two: before carrying out narrow-gap magnetic control swing arc welding on a ferromagnetic material, checking whether a magnetic control coil can be normally started or not, and then placing a plate to be welded at a proper position;
step three: turning on a power supply of the magnetic control coil to enable the magnetic control coil to work normally;
step four: starting an arc striking button to strike an arc and matching with wire feeding, and starting arc swinging narrow gap welding on the ferromagnetic narrow gap groove;
step five: after the arc extinguishing operation is completed, the electromagnetic coil switch is closed after a short period of time, and the welding of the magnetic control swinging arc in the ferromagnetic narrow-gap slope is finished.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111000615.0A CN113857623A (en) | 2021-08-30 | 2021-08-30 | Magnetic control swinging arc magnetic circuit device for ferromagnetic steel GTAW narrow gap welding and application |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111000615.0A CN113857623A (en) | 2021-08-30 | 2021-08-30 | Magnetic control swinging arc magnetic circuit device for ferromagnetic steel GTAW narrow gap welding and application |
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| CN113857623A true CN113857623A (en) | 2021-12-31 |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114273756A (en) * | 2022-01-05 | 2022-04-05 | 湘潭大学 | T-shaped magnetism-collecting electric arc sensor for argon arc welding seam tracking |
| CN114505561A (en) * | 2022-02-24 | 2022-05-17 | 华智焊测高科(苏州)有限公司 | Method and device for correcting electric arc piercing welding magnetic blow by external magnetic field |
| CN114700588A (en) * | 2022-03-04 | 2022-07-05 | 湘潭大学 | Welding seam identification method for controlling arc rotation through electric field |
| CN114871535A (en) * | 2022-05-06 | 2022-08-09 | 天津工业大学 | Welding device and process for applying external mixed magnetic field to act on dissimilar steel |
-
2021
- 2021-08-30 CN CN202111000615.0A patent/CN113857623A/en active Pending
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114273756A (en) * | 2022-01-05 | 2022-04-05 | 湘潭大学 | T-shaped magnetism-collecting electric arc sensor for argon arc welding seam tracking |
| CN114505561A (en) * | 2022-02-24 | 2022-05-17 | 华智焊测高科(苏州)有限公司 | Method and device for correcting electric arc piercing welding magnetic blow by external magnetic field |
| CN114700588A (en) * | 2022-03-04 | 2022-07-05 | 湘潭大学 | Welding seam identification method for controlling arc rotation through electric field |
| CN114700588B (en) * | 2022-03-04 | 2023-07-18 | 湘潭大学 | Weld joint identification method for electric field to control arc rotation |
| CN114871535A (en) * | 2022-05-06 | 2022-08-09 | 天津工业大学 | Welding device and process for applying external mixed magnetic field to act on dissimilar steel |
| CN114871535B (en) * | 2022-05-06 | 2024-04-19 | 天津工业大学 | Welding device and process for applying external mixed magnetic field to dissimilar steel |
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