CN104588846A - Method and device for increasing TIG welding electric arc energy density - Google Patents
Method and device for increasing TIG welding electric arc energy density Download PDFInfo
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- CN104588846A CN104588846A CN201410740763.XA CN201410740763A CN104588846A CN 104588846 A CN104588846 A CN 104588846A CN 201410740763 A CN201410740763 A CN 201410740763A CN 104588846 A CN104588846 A CN 104588846A
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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
- B23K9/167—Arc welding or cutting making use of shielding gas and of a non-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
- B23K9/08—Arrangements or circuits for magnetic control of the arc
-
- 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
- B23K2101/00—Articles made by soldering, welding or cutting
- B23K2101/04—Tubular or hollow articles
- B23K2101/06—Tubes
-
- 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
- B23K9/0026—Arc welding or cutting specially adapted for particular articles or work
- B23K9/0035—Arc welding or cutting specially adapted for particular articles or work of thin articles
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- Physics & Mathematics (AREA)
- Plasma & Fusion (AREA)
- Mechanical Engineering (AREA)
- Arc Welding Control (AREA)
- Arc Welding In General (AREA)
Abstract
The invention provides a method and device for increasing the TIG welding electric arc energy density and belongs to the technology field of control over welding electric arc characteristics. The method and the device are characterized in that magnetizing currents are supplied to a magnetic head coil on a TIG welding gun, and thus the magnetic head coil is made to generate a magnetic field in an electric arc area; the generated magnetic field acts on electric arcs, and the electric arcs are made to contract; the electric arc forms, the electric arc pressure distribution, the electric arc energy density distribution and the electric arc temperature are regulated by regulating the magnetizing currents, the frequency of the magnetic field and the pulse currents, and thus parameters for increasing the electric arc central energy density to the maximum are obtained. The method and device for increasing the TIG welding electric arc energy density aim at increasing the deposition rate of welding seams by increasing the electric arc center energy density and improving the welding efficiency accordingly.
Description
Technical field
The invention belongs to a kind of welding arc control technology field, particularly one utilizes external high-frequency longitudinal magnetic field to compress TIG and welds electric arc, improves the apparatus and method of TIG welding energy density.
Background technology
Tradition TIG weldering is a kind of welding method obtaining high-quality weld seam, is widely used, almost can be used for the connection of all metals, be particularly suitable for the welding of thin plate or thin-wall pipe in modern industry.But TIG welds electric arc spread heat, energy density is low, arc force is little and tungsten electrode affects by electric current allowable, limits the application of the method in cut deal and high efficiency.Weld shallow, the inefficient problem of fusion penetration to solve traditional TIG, people have carried out remodeling and innovation research from many aspects to TIG weldering.As activating flux TIG weldering (A-TIG), current impulse TIG weldering, superaudio pulse TIG welding and sharp magnetic field TIG etc., wherein A-TIG weldering can increase weld penetration significantly, improve welding productivity, expand its application greatly, but many aspects of A-TIG solder technology still await perfect further, and such as different purposes develops the stage that serial activated rosin flux is still in repetition test, gropes.Have scholar to propose pulse TIG welding and have certain compression to electric arc, contraction principle is mainly the electromagnetic compression effect of electric arc self.There is scholar will be welded by superaudio pulse current, obtain good welding effect, but relatively high to the requirement of the source of welding current.There is scholar to pass through to apply sharp magnetic field to welding arc, under the effect of electromagnetic force, compress welding arc improve arc energy.The present invention, by installing magnetic field device on welding gun, produces the longitudinal magnetic field of parallel welding gun axis.And the present invention welds around electric arc at traditional TIG to make electric arc produce " pinch effect " by applying external high-frequency longitudinal magnetic field, improving welding arc energy, increasing weld penetration, improve weldquality.
Summary of the invention
goal of the invention:the invention provides a kind of method and apparatus improving TIG weldering arc energy density, its object is in the welding method to cut deal, to there is the aspect Problems existing such as TIG welds electric arc spread heat, energy density is low, arc force is little, TIG weldering is molten shallow.
technical scheme:
Improve the method that TIG welds arc energy density, it is characterized in that: the method is carried out in accordance with the following steps:
Step one: by high frequency magnetron device, field frequency is adjusted to high frequency, the exciting curent produced by high frequency magnetron device, exciting curent supplies the high-frequency mangetic head be arranged on TIG welding gun, makes it produce longitudinal magnetic field in arc region;
Step 2: produce a high frequency magnetic field being parallel to electric arc arc column axis by high frequency magnetron device and act on electric arc, the magnetic field of generation produces the effect of power to TIG welding arc thus makes electric arc occur magnetic compression effect, improves arc energy density;
Step 3: this magnetic compression effect can improve the pressure of TIG welding arc, improve the form of TIG welding arc, welding arc narrows by compression, improves the deflection of TIG welding arc simultaneously;
Step 4: adjust it to TIG electric arc compression size by the size and frequency that regulate exciting curent, there is the most obvious welding parameter of pinch effect.
The adjustable range of speed of welding is in step 1: 3.5 ~ 5.5m/min; The adjustable range of exciting curent is: 1 ~ 300A; Field frequency adjustable range is: 1 ~ 8KHz; Magnetic field intensity scope is 10mT ~ 100mT; Zone of welding current: 1 ~ 500A.
When magnetic field intensity be 30mT, magnetic impulse frequencies is 1500Hz, now the freer electric arc of electric arc heat is compared, and lifting amplitude is 11.5%, and fusion penetration increases by 47.1%, molten wide reduction by 3.52%.
Raising TIG as above welds a device for arc energy density, it is characterized in that: this device is made up of high frequency magnetron device, tig arc welding machine, TIG welding gun, high-frequency mangetic head and tungsten electrode; High frequency magnetron device is connected with tungsten electrode, and high-frequency mangetic head is arranged on TIG welding gun, and tungsten electrode is arranged on the relative position of high-frequency mangetic head, and the both positive and negative polarity of TIG welding gun is connected with workpiece with high-frequency mangetic head respectively.
High-frequency mangetic head meets the size of TIG welding gun, and both are integrated, and mutually insulated.
The adjustable range of the exciting curent of described high frequency magnetron device is: 1 ~ 300A; Field frequency adjustable range is: 1 ~ 8KHz; Magnetic field intensity scope is 10mT ~ 100mT; Zone of welding current: 1 ~ 500A.
advantage and effect:the effect of welding process medium-high frequency magnetic field impulse makes appearance of weld good, and molten reductions is little, and fusion penetration enlarges markedly, and magnetic field pulse frequency also exists a best parameter area.Welding arc form can be made to change, and by the bell jar form of free electric arc, boil down to cylindricality, simultaneously can improve welding arc temperature, and electric arc heat is more concentrated, significantly improves welding arc pressure, the fusion penetration of weld seam is increased, to melt reductions little.This kind of technique attachment device cost is low, and volume is little, easy to use, and can improve arc shape and arc behavior.
accompanying drawing illustrates:
Fig. 1 is the structural representation of apparatus of the present invention.
Mark in figure: high frequency magnetron device 1, tig arc welding machine 2, TIG welding gun 3, high-frequency mangetic head 4, tungsten electrode 5, workpiece 6.
detailed description of the invention:be described in detail below in conjunction with accompanying drawing 1 pair of the specific embodiment of the present invention:
As shown in Figure 1, device of the present invention is also simultaneously field power supply primarily of high frequency magnetron device 1(), tig arc welding machine 2(is also TIG Welding Machine), the TIG welding gun 3 be connected with tig arc welding machine 2, the high-frequency mangetic head 4 be arranged on TIG welding gun 3 form.Welding arc is delivered on workpiece 6 by tungsten electrode 3, and high-frequency mangetic head 4 is made up of adpting flange, solenoid, thermal insulation board, magnet exciting coil, magnet exciting coil baffle plate.High frequency magnetron device 1 is grouped into by exciting curent display, magnet exciting coil temperature indicator, exciting curent and frequency adjustment, be connected with the high-frequency mangetic head 4 on TIG welding gun 3, high-frequency mangetic head 4 meets the size of TIG welding gun 3, and both are integrated, and mutually insulated.TIG weldering adopts straight polarity.
The positive pole of tig arc welding machine 2 connects welding work pieces 6, and negative pole connects TIG welding gun 3, and zone of welding current is 1 ~ 500A.The input voltage of high frequency magnetron device 1 is 220V alternating current, and output is the direct current of 1 ~ 300A, and load is magnet exciting coil.The function of high frequency magnetron device 1 is to provide the pulsed magnetic field that can regulate continuously.High frequency magnetic field impulse acts on welding region and improves arc energy density.
Embodiment:
Step one: according to the material of welding work pieces 6, thickness of slab (or wall thickness) and speed of welding requirement; select TIG welding condition, as the distance etc. of welding current, arc voltage, protection gas (argon gas) flow, tungsten electrode 5 diameter and end shape, tungsten electrode 5 end and workpiece 6.
Step 2: the both positive and negative polarity of tig arc welding machine 2 is connected to respectively welding work pieces 6 and TIG welding gun 3; Magnet exciting coil is received in the output of high frequency magnetron device, ensure that TIG welding gun 3 is perpendicular to workpiece 6.Open tig arc welding machine 2 power supply, electric current is adjusted to impulse form, and arranges current value, has started arc welding.During welding, TIG welding gun 3 is motionless, and workpiece 6 moves.Workpiece 6 movement velocity and speed of welding.
Step 3: exciting curent is produced by high frequency magnetron device, and supplies magnet exciting coil; Magnet exciting coil produces longitudinal magnetic field; Plasma moves to from tungsten electrode 5 motion doing cutting magnetic line the process of workpiece 6, thus produces Lorentz force.
Step 4: by changing exciting curent size and field frequency size, make making a concerted effort as far as possible longitudinally of Lorentz force, thus electric arc is compressed, arc center's energy density, arc pressure increase.
Wherein, the longitudinal magnetic field strength range in step 3 is: magnetic field intensity can be divided into 10mT ~ 100mT.
The adjustable range of the exciting curent in step 4 is: 1 ~ 300A; The adjustable range of field frequency: 1 ~ 8KHz.
test and test result:
Experiment: the welding current virtual value of employing is 80A, tungsten tip cone angle 45 degree, diameter of phi 3.2mm, argon flow amount 10L/min, and shooting speed is set as 1/4000s, and magnetic induction intensity 30mT, magnetic impulse frequencies is respectively 1000Hz, 1500Hz, 2000Hz.After experiment, contrast welding arc form respectively, electric arc heat, weld penetration, molten wide.
As shown in table 1, along with the increase of magnetic induction intensity (B), when electric arc heat breadth coefficient reaches peak value, corresponding magnetic impulse frequencies becomes large thereupon.Namely, when magnetic induction intensity is 10mT, it is 49.61% that TIG welds electric arc heat breadth coefficient peak value, and corresponding magnetic impulse frequencies is 1000Hz; When magnetic induction intensity is 20mT, electric arc heat breadth coefficient maximum is 50.18%, and magnetic impulse frequencies is 1200Hz; When magnetic induction intensity is 30mT, electric arc heat breadth coefficient peak value is 50.84%, and magnetic impulse frequencies is now 1500Hz; When magnetic induction intensity is 40mT, it is 50.31% that TIG welds electric arc heat breadth coefficient, and corresponding magnetic impulse frequencies is 1800Hz.From relatively, be 30mT at magnetic induction intensity, when magnetic impulse frequencies is 1500Hz, electric arc heat is the most concentrated, and heat breadth coefficient is maximum, and it is the most obvious that freer electric arc compares lifting, elevation amplitude nearly 11.5%.In addition, when magnetic impulse frequencies reaches 2500Hz, along with the increase of magnetic impulse frequencies, the electric arc heat breadth coefficient difference of different magnetic induction intensity reduces gradually; When frequency reaches after 6000Hz, the electric arc heat breadth coefficient value under different magnetic induction intensity is substantially identical.
electric arc heat distribution under the different magnetic impulse frequencies of table 1
| Magnetic impulse frequencies (Hz) | Electric arc heat (B=10mT) | Electric arc heat (B=20mT) | Electric arc heat (B=30mT) | Electric arc heat (B=40mT) |
| 0 | 39.52 | 39.52 | 39.52 | 39.52 |
| 500 | 44.01 | 43.19 | 42.17 | 41.58 |
| 800 | 48.29 | 45.97 | 44.6 | 43.82 |
| 1000 | 49.61 | 48.38 | 47.47 | 45.37 |
| 1200 | 48.74 | 50.18 | 49.26 | 47.03 |
| 1500 | 45.83 | 48.83 | 50.84 | 49.32 |
| 1800 | 44.63 | 45.76 | 48.93 | 50.31 |
| 2000 | 44.12 | 45.01 | 46.1 | 48.72 |
| 2500 | 43.21 | 43.69 | 44.38 | 45.29 |
| 3000 | 44.08 | 44.88 | 45.27 | 44.37 |
| 4000 | 43.87 | 43.26 | 44.05 | 44.96 |
| 5000 | 44.67 | 44.77 | 45.26 | 43.76 |
| 6000 | 45.9 | 44.99 | 45.08 | 44.99 |
| 7000 | 44.71 | 45.3 | 45.09 | 45.79 |
As shown in table 2, after argon tungsten-arc welding applies the pulse of high-frequency impulse longitudinal flux, welding arc is changed by free state, cross-direction shrinkage bell jar cross section diminishes, receive compression, and during magnetic impulse frequencies about 1500Hz, when magnetic induction intensity is 30mT, electric arc cross section is retracted to minimum, the effect of electric arc high compression is remarkable.Freer electric arc is compared, and when arc constriction after applying magnetic field impulse, weld penetration increases, and melts wide diminishing.When magnetic impulse frequencies reaches 1500Hz, weld penetration increases to 2.03mm by original 1.38mm, and fusion penetration increases by 47.1%.Molten be widely reduced to 4.11mm from 4.26mm, molten wide reduction by 3.52%.
Appearance of weld situation under the different magnetic impulse frequencies of table 2
| Magnetic impulse frequencies (Hz) | Weld pool width (mm) | Weld penetration (mm) |
| 0 | 4.26 | 1.38 |
| 1000 | 4.2 | 1.54 |
| 1500 | 4.11 | 2.03 |
| 2000 | 4.18 | 1.57 |
Claims (6)
1. improve the method that TIG welds arc energy density, it is characterized in that: the method is carried out in accordance with the following steps:
Step one: by high frequency magnetron device (1), field frequency is adjusted to high frequency, the exciting curent produced by high frequency magnetron device (1), exciting curent supplies the high-frequency mangetic head (4) be arranged on TIG welding gun (2), makes it produce longitudinal magnetic field in arc region;
Step 2: produce a high frequency magnetic field being parallel to electric arc arc column axis by high frequency magnetron device (1) and act on electric arc, the magnetic field of generation produces the effect of power to TIG welding arc thus makes electric arc occur magnetic compression effect, improves arc energy density;
Step 3: this magnetic compression effect can improve the pressure of TIG welding arc, improve the form of TIG welding arc, welding arc narrows by compression, improves the deflection of TIG welding arc simultaneously;
Step 4: adjust it to TIG electric arc compression size by the size and frequency that regulate exciting curent, there is the most obvious welding parameter of pinch effect.
2. a kind of method improving TIG weldering arc energy density according to claim 1, is characterized in that: the adjustable range of speed of welding is in step 1: 3.5 ~ 5.5m/min; The adjustable range of exciting curent is: 1 ~ 300A; Field frequency adjustable range is: 1 ~ 8KHz; Magnetic field intensity scope is 10mT ~ 100mT; Zone of welding current: 1 ~ 500A.
3. a kind of method improving TIG weldering arc energy density according to claim 1, it is characterized in that: when magnetic field intensity be 30mT, magnetic impulse frequencies is 1500Hz, now the freer electric arc of electric arc heat is compared, and lifting amplitude is 11.5%, and fusion penetration increases by 47.1%, molten wide reduction by 3.52%.
4. the TIG of raising as claimed in claim 1 welds a device for arc energy density, it is characterized in that: this device is made up of high frequency magnetron device (1), tig arc welding machine (2), TIG welding gun (3), high-frequency mangetic head (4) and tungsten electrode (5); High frequency magnetron device (1) is connected with tungsten electrode (5), high-frequency mangetic head (4) is arranged on TIG welding gun (3), tungsten electrode (5) is arranged on the relative position of high-frequency mangetic head (4), and the both positive and negative polarity of TIG welding gun (3) is connected with workpiece (6) with high-frequency mangetic head (4) respectively.
5. raising TIG according to claim 4 welds the device of arc energy density, it is characterized in that: high-frequency mangetic head (4) meets the size of TIG welding gun (3), and both are integrated, and mutually insulated.
6. raising TIG according to claim 4 welds the device of arc energy density, it is characterized in that: the adjustable range of the exciting curent of described high frequency magnetron device (1) is: 1 ~ 300A; Field frequency adjustable range is: 1 ~ 8KHz; Magnetic field intensity scope is 10mT ~ 100mT; Zone of welding current: 1 ~ 500A.
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| CN109365958A (en) * | 2018-11-28 | 2019-02-22 | 江苏科技大学 | A kind of hollow tungsten electrode TOPTIG welding method of gas-magnetic combined regulating |
| CN109623115A (en) * | 2018-12-20 | 2019-04-16 | 航天海鹰(哈尔滨)钛业有限公司 | A method of improving metal solidification texture |
| CN110576239A (en) * | 2019-09-11 | 2019-12-17 | 清华大学 | Arc milling device and method for rotating arc |
| CN111250827A (en) * | 2020-03-17 | 2020-06-09 | 沈阳工业大学 | Device and method for improving surface forming quality of arc fuse additive component |
| CN113333921A (en) * | 2021-06-01 | 2021-09-03 | 南京理工大学 | Wire feeding and powder feeding composite electric arc additive TIG welding gun device with magnetic field effect |
| CN116197499A (en) * | 2023-05-04 | 2023-06-02 | 冰轮环境技术股份有限公司 | Cylinder weld joint welding process |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| CN109365958A (en) * | 2018-11-28 | 2019-02-22 | 江苏科技大学 | A kind of hollow tungsten electrode TOPTIG welding method of gas-magnetic combined regulating |
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| CN110576239A (en) * | 2019-09-11 | 2019-12-17 | 清华大学 | Arc milling device and method for rotating arc |
| CN111250827A (en) * | 2020-03-17 | 2020-06-09 | 沈阳工业大学 | Device and method for improving surface forming quality of arc fuse additive component |
| CN113333921A (en) * | 2021-06-01 | 2021-09-03 | 南京理工大学 | Wire feeding and powder feeding composite electric arc additive TIG welding gun device with magnetic field effect |
| CN116197499A (en) * | 2023-05-04 | 2023-06-02 | 冰轮环境技术股份有限公司 | Cylinder weld joint welding process |
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