CN202963740U - Device for realizing arc stabilizing effect by utilizing auxiliary external electric field applied between submerged arc welding slag and gold along with welding - Google Patents
Device for realizing arc stabilizing effect by utilizing auxiliary external electric field applied between submerged arc welding slag and gold along with welding Download PDFInfo
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- CN202963740U CN202963740U CN 201220506431 CN201220506431U CN202963740U CN 202963740 U CN202963740 U CN 202963740U CN 201220506431 CN201220506431 CN 201220506431 CN 201220506431 U CN201220506431 U CN 201220506431U CN 202963740 U CN202963740 U CN 202963740U
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Abstract
The utility model discloses a device for realizing an arc stabilizing effect by utilizing an auxiliary external electric field applied between submerged arc welding slag and gold along with welding and belongs to the field of submerged arc welding. The device comprises a welding torch and a welding main circuit and further comprises an auxiliary circuit capable of forming the welding auxiliary electric field, wherein the auxiliary circuit comprises a direct current power supply and a metal conductive electrode, a cathode of the direct current power supply is connected with the metal conductive electrode, an anode of the direct current power supply is connected with base metal, and the metal conductive electrode is a tungsten bar. Through the adoption of the technical scheme, the device has the beneficial effect that after the external electric field is applied between the slag and the gold, the conductive property of molten slag is greatly improved, and the formation of a submerged arc welding seam is further improved, so that the edge straightness of the welding seam is increased, the width is more uniform, and the shape of the welding seam is smoother, and undercut and other appearance defects can be better overcome; and at the moment, compared with the existing submerged arc welding, the stable combustion of a welding arc is more facilitated, the welding process is more stable, and the formation of the welding seam is better.
Description
Technical field
The utility model belongs to the submerged arc welding field, more particularly, relates to a kind of the utilization between submerged arc welding slag gold and applies with weldering the device that auxiliary external electric field realizes the stabilising arc effect.
Background technology
Weld seam in metal structure is to be fused into liquid molten bath under the electric arc heated effect, and with by solidifying and form, the electric arc heated effect plays conclusive effect to the geometry in molten bath.Inevitably because the electric arc fluctuation forms the various appearances defective, owe smooth as face of weld in welding process, weld seam width is inhomogeneous, weld edge undercut etc.Open defect, particularly undercut defective can cause serious stress to concentrate, and this is in easily cracks the inefficacy that the source finally causes structure under the load state.Appearance of weld directly affects again the exterior appearance of product simultaneously, and manufacturer and user comparatively pay close attention to this.For this reason, important meals structure such as pressure vessels for the chemical industry, shipbuilding etc. all need to carry out the face of weld polishing at postwelding and repair, but this expends again a large amount of time and labour cost, and polishing reparation working condition is also comparatively abominable.The construction of large-size chemical pressure vessel at present mainly relies on efficient large-line energy Lincoln weld to carry out welding processing, because generally all requiring the operation performance, the pressure vessel manufacturing relatively welds not as the alkalescent sintered flux of acid slag system, and the butt welded seam surface quality has higher requirement, especially the uniformity of the welding bead undercut degree of depth, weld reinforcement, weld width and face of weld fineness etc. is all worked out the test rating of quantification.By further improving the stability of welding process electric arc, control to greatest extent the fluctuation of weld seam forming process for this reason, enhance productivity thereby can effectively reduce postwelding reclamation work amount.
According to the ion characteristic of slag, slag has certain electric conductivity in molten condition itself, and this performance that takes full advantage of slag has become rather novel study hotspot in the steel-making field of metallurgy at present." applying direct current electric field pollution-free deoxidizing between the slag gold " (Li Jianchao, Zhang Jieyu, Lu Xionggang, etc., process engineering journal, 2006 supplementary issues), disclose at molten steel and Al
2O
3Apply the galvanic current field between-CaO-MgO slag, carry out the method for deoxidation of molten steel.The method is induced the migration of molten steel and slag intermediate ion by external electric field, dissolved oxygen in molten steel is had good removal effect." Metallurgy with controlled oxygen flow " (Gao Yunming, Jiang Ying, Zhang Hua, etc., Wuhan University Of Technology's journal (natural science edition), 2007, the fifth phase) discloses the method for utilizing electrochemical principle to control oxygen flow in molten steel." research of external electric field pollution-free deoxidizing method between the slag gold " in addition (Yuan Wei is etc., Acta Metallurgica Sinica second phase in 2005 for Lu Xionggang, Liang Xiaowei) also discloses to utilize and applied DC electric field between the slag gold and induce in melt the charged ion method of motion in order.Because Welding Metallurgy process and steel-making metallurgical process have similarity in itself, the effect of implementing external electric field in welding process between the slag gold also will inevitably cause slag and the liquid metal internal electricity is led some orderly motion of carrying object.But it is very different again that the electric conductivity of slag is compared metal, if can manage to improve the electric conductivity of slag in welding process for this reason, also just can the orderly motion of melt inside under this External Electrical Field be effectively utilized, this might open up from a brand-new angle new way of Welding Metallurgy quality control.The author applies on the basis of external electric field control oxide inclusion research between to welding process slag gold, find by experimental study, also there are some beneficial effects in external electric field to welding procedure under certain condition, and this has good using value to the stability that solves welding process.
The utility model content
The technical problem that solves
The problems such as postwelding reclamation work of bringing for undercut and forming defects in the important manufacture of steel structures such as the pressure vessel that exists in prior art, the utility model provides a kind of the utilization between submerged arc welding slag gold to apply with weldering the device that auxiliary external electric field realizes the stabilising arc effect, it can be led current-carrying to slag gold electricity and carry out water conservancy diversion, and then realizes the stabilising arc effect.
Technical scheme
The purpose of this utility model is achieved through the following technical solutions.
A kind of utilization between submerged arc welding slag gold of the present utility model applies with weldering the device that auxiliary external electric field realizes the stabilising arc effect, it comprises welding torch and welding main circuit, it also comprises the auxiliary circuit that can form the welding auxiliary electric field, described auxiliary circuit comprises dc source and metallic conduction electrode, the negative pole of described dc source connects the metallic conduction electrode, and positive pole connects base metals; Described metallic conduction electrode is tungsten bar.
Preferably, described tungsten bar is fixed on welding head and with ignition tip with the insulating resin chuck and insulate, and must be noted that herein tungsten bar and ignition tip keep insulation, and the tungsten bar otherwise the welding main circuit current will be flowed through does not have the effect of auxiliary electric field.The distance between two tips wire tip 5-8mm of described tungsten bar, in welding process, tungsten bar is synchronized with the movement as electrode and welding head, be provided with clamping on this insulating resin chuck, unclamp knob, be used for tungsten bar is clamped, being about to knob after the tungsten bar position is fixing clamps, as described in regulating as need tungsten bar highly can unclamp knob up and down, tungsten bar is adjusted up and down; Described tungsten bar and connecting position of wires are wound around rear the clamping with the copper intermediate plate with wire heart yearn and described tungsten bar.
Preferably, described dc source is the D.C. regulated power supply of 30V/50A.Because alternating current can not consist of stable electric field, therefore must adopt dc source, the conductance of slag is limited simultaneously, and the electric current of flowing through between the slag gold generally can not surpass 15A, and it is nonsensical therefore selecting excessive supply voltage.
Preferably, described tungsten bar diameter is 3.2mm.
Beneficial effect
Than prior art, the utility model has the advantage of:
(1) can launch a large amount of electronics based on tungsten electrode, auxiliary circuit of the present utility model is made negative electrode to a large amount of free electrons of the inner input of molten slag with tungsten electrode, can greatly improve the electrical conductivity of molten slag performance, and guide electronics directly to enter the molten bath to strengthen the electron emissivity of arc cathode, make welding arc more concentrate on the centre in molten bath; Simultaneously, auxiliary electric field both can make the inner ionic conductance of slag gold form orderly motion and synthesize the activating oxide of low-surface-energy in interface junction, can improve again molten slag in the wetting and spreading performance on weld metal surface;
(2) the technical solution of the utility model is after applying external electric field between the slag gold, not only the electric conductivity of slag obtains larger improvement, also further improved the submerged arc weld shaping, make that the weld edge glacing flatness increases, width is more even, weld shape is more bright and clean round and smooth, can overcome preferably the open defects such as undercut, compare with existing submerged-arc welding this moment, more be conducive to the smooth combustion of welding arc, welding procedure is more stable, and appearance of weld is also more good.
Description of drawings
Fig. 1 is the Fundamentals of Welding schematic diagram that applies external electric field;
Fig. 2 is the electrical block diagram of the welding signal of telecommunication analyzer in embodiment 1;
Fig. 3 is the welding arc voltage probability density distribution, and wherein, Fig. 3 (a) electric power output voltage at home and abroad is 30V, and Fig. 3 (b) electric power output voltage at home and abroad is 25V;
Fig. 4 is the systems soft ware general structure block diagram of welding signal of telecommunication analyzer.
Number in the figure explanation: 1, liquid welding slag; 2, solder flux; 3, electric arc; 4, molten pool metal; 5, base metals; 6, solidify welding slag; 7, weld metal.
The specific embodiment
Below in conjunction with Figure of description and specific embodiment, the utility model is described in detail.
As Fig. 1, a kind of utilization between submerged arc welding slag gold of the present utility model applies with weldering the device that auxiliary external electric field realizes the stabilising arc effect, it comprises welding torch and welding main circuit, also comprise the auxiliary circuit that can form the welding auxiliary electric field, described auxiliary circuit comprises dc source and metallic conduction electrode, described dc source negative pole connect tungsten bar, positive pole connects base metals 5.Tungsten bar is fixed on welding head and with ignition tip with the insulating resin chuck and insulate, and the distance between two tips wire tip 5-8mm of described tungsten bar is provided with clamping on this insulating resin chuck, unclamps knob, is used for tungsten bar is clamped; Described tungsten bar and connecting position of wires are wound around rear the clamping with the copper intermediate plate with wire heart yearn and described tungsten bar.
The welding equipment of the present embodiment 1 is selected MZ-1000 type submerged arc welding machine, and electric power polarity adopts the dc reverse connection method, carries out automatic welding with walking dolly.Welding material is the H10Mn2 welding wire of SJ101 sintered flux fit diameter 4mm.On being the Q235 steel plate of 14mm, thickness carries out surface overlaying, welding conditions during welding: welding current 600-610A, arc voltage 30-34V, speed of welding 33cm/min.
The principle schematic of the device of the present embodiment is seen Fig. 1, provides auxiliary external electric field with the D.C. regulated power supply of 30V/50A.One output stage of voltage-stabilized power supply connects the tungsten bar that diameter is 3.2mm, and another output stage and base metals 5 are connected.In Fig. 1, conversion K1 can change the output polarity of accessory power supply.Tungsten bar is fixed on the wire feed head tungsten bar and welding wire ignition tip mutually insulated with the insulating resin fixture.The distance between two tips wire tip 5-8mm of tungsten bar.The current signal of observing voltage-stabilized power supply by test weld before test is adjusted tungsten bar up and down highly, makes it just in time insert liquid welding slag 1 inside of electric arc 3 peripheries, does not cause short circuit but enter the molten bath.Connect the dc source of auxiliary circuit during welding, tungsten bar is synchronized with the movement in company with head, has so namely applied an auxiliary external electric field between slag and molten bath.
Apply external electric field and do not apply the external electric field soldering test under the identical condition of other technique.For inquiring into External Electrical Field to the impact of welding arc 3, the welding signal of telecommunication analyzer of using development voluntarily carries out data acquisition and analysis to welding process electric arc 3 voltages.
The system hardware structure of this welding signal of telecommunication analyzer possesses the functions such as automatic acquisition of welding electrical signal collection, demonstration in real time and playback, welding signal of telecommunication statistical graph and statistical parameter as shown in Figure 2.This analyzer is comprised of welding current and voltage sensor, signal conditioning circuit, data collecting card and computer.Wherein welding current and voltage sensor adopt closed loop (compensation) formula Hall element, and this sensor input and output high degree of isolation can realize measuring circuit and welding major loop high-insulation, is fit to very much the intense electromagnetic interference environment in the welding test process.That data collecting card is selected is the USB-6210 of America NI company.USB-6210 is usb bus power supply multifunctional data acquisition card, and plug and play is very easy to use.The main performance index of this card is: 16 tunnel 16 analog inputs, the highest sample frequency of single channel is 250 kHz, satisfies data acquiring frequency and the required precision of the welding signal of telecommunication.The welding current that gathers and voltage signal machine as calculated show electric current and voltage waveform in real time by display after processing, and with the initial data deposit that gathers, are used for postwelding wave shape playback and data analysis simultaneously.
Design of System Software is as follows:
Welding signal of telecommunication analyzer adopts LabVIEW 8.2 as development platform, and the systems soft ware general structure of analyzer as shown in Figure 4.Software adopts modularized design, is divided into data acquisition, wave shape playback, data analysis and four modules of database, down segments some modules again.Because the LabVIEW program has complete modularization characteristics, can add at any time/the delete function module, do not affect the function of other module, this is very favorable for system maintenance and renewal.
Data acquisition module is mainly completed welding current and voltage signal acquisition and waveform and is shown in real time, realizes simultaneously the initial data preservation.Data are preserved with the up-to-date TDMS file format of LabVIEW, have preservation, reading speed is fast, are convenient to the advantage that the test relevant information is preserved in company with data file.
The data readback modular design is considerable for native system.When analyzing the welding signal of telecommunication, often cannot analyze whole data file, because welding process is full of a lot of uncertain factors, signal characteristic in signal characteristic when operating shakiness as the welding operator and stable arcing process is just very different, if and the data analysis of back requires to analyze the signal characteristic of stablizing the arcing process, just need to extract the data segment of stablizing the arcing process and re-start preservation from whole data file.For this reason, the data readback module should provide abundant data readback operating function, oneself need to select the waveform segment of selective analysis to facilitate the user from very long waveform, guarantees that again the user can preserve again to interested data segment.When native system designs at playback function, fully take into account this 2 point, for the requirement of first aspect, module provides manual and automatic playback two kinds of patterns, the data volume of each playback can freely be selected, and the convenient operation person finds an equalization point at definition and the playback speed of signal characteristic like this.For the auto back playing function, system can also electrodeless adjusting playback speed.For the requirement of second aspect, system utilizes vernier to catch needs starting point and the end point of save data section again, and then program is preserved the data between starting point and end point, thereby realizes selection and the preservation of data of interest section.Because the data of preserving are the initial data of non-filtered, also provide the function choosing-item of whether filtering in playback module.
The function that data analysis module mainly comprises has: draw welding current and voltage probability density distribution figure, the frequency chart of the major parameters such as short circuit duration, arc time, U-I(weldingvoltage-welding current) figure; Extract the statistical parameter of twenties reflection droplet transfer information such as average short circuit duration, short circuit duration standard deviation.In this module, except the drafting of probability density figure and U-I figure is fairly simple, the realization of other function relates to the algorithm of more complicated, implement very complicated with the LabVIEW graphic programming, practice shows, when the LabVIEW graphic programming runs into restriction, can adopt take LabVIEW as main, the method for LabVIEW and C language hybrid programming solves.Native system is by the CLF(Call Library Function Node in LabVIEW) node calls dynamic link library (dll file) and carries out LabVIEW and C language hybrid programming, and then realize smoothly the analytic function of welding current and voltage data.Its method is, at first uses C language Realization analysis algorithm, then these formation functions in dll file, then call with the CLF node in the LabVIEW program and write the dll file of keeping and realize data analysis function.DBM is mainly to realize record queries and report printing.
Because the submerged arc welding process droplet transfer has periodic feature, welding arc 3 voltage signals present jagged waveform, directly are difficult to differentiation according to this waveform and relatively apply before and after external electric field both differences.For this reason, utilize above-mentioned welding signal of telecommunication analyzer, this test is done the probability density distribution statistical analysis to electric arc 3 voltage signals that gather, relatively to apply external electric field and not apply the situation of change of external electric field signal.Welding signal of telecommunication analyzer is received negative electrode and the anode of welding arc 3, can be carried out the data acquisition of electric arc 3.
The below does following analysis to the stabilising arc effect of the external electric field that applies in the present embodiment 1:
(1) carry out extra electric field below and apply effect test.
The test demonstration, the output polarity of the dc source of auxiliary electric field has influence on the effect that applies of external electric field to a certain extent.When the positive pole that adds accessory power supply and tungsten electrode join, the spread of voltage that acts between the slag gold, corresponding current fluctuation is larger.But when the polarity that changes accessory power supply, its negative pole is communicated with tungsten electrode, when the DC power output voltage that arrange auxiliary electric field this moment is 20-30V, can forms the auxiliary current of very stable 5-8A between the slag gold, meanwhile, the voltage between the slag gold also descends and is stabilized between 10-12V.When the initial output voltage of the dc source that adds auxiliary electric field was set to zero, the electric current that test is slagged tap between gold was still zero, show do not form between the slag gold when not applying external electric field stable ion current to.
Under normal conditions, the electric conductivity of slag depends primarily on the ionic conductance that the oxide of melting ionizes out under hot conditions, and the electric conductivity of liquid metal depends on inner electronic conductance.By contrast, the electric conductivity of slag can not show a candle to molten pool metal 4.When applying an external electric field and tungsten electrode between the slag gold and make negative electrode, tungsten is at high temperature launched a large amount of electronics, these electronics enter the conductive capability that liquid welding slag 1 internal poles the earth has strengthened slag under electric field action, impel the very stable electric current of formation between the slag gold.And when the external power reversing be that tungsten electrode is when making anode, serve as at this moment the effect of accepting external electronics due to tungsten electrode, and the emission electronics under electric field action against direction of an electric field with the opposite direction that flows to molten pool metal 4, the electric conductivity of slag is not improved well, thereby is difficult for forming stable electric current between the slag gold.
In addition, the insertion position of tungsten electrode also consists of larger impact to the formation of auxiliary current.Because solder flux 2 only just has electric conductivity in molten condition, when the electric current of accessory power supply is shown as zero, and voltage is when being shown as initial setting up voltage, shows that this moment tungsten electrode is still inner for inserting slag.When the accessory power supply electric current is shown as 22-25A, voltage shows and shows that electrode has inserted molten pool metal 4 and caused short circuit close to zero the time.Therefore, according to the electric current of flowing through between the slag gold and corresponding voltage signal, can the insertion position of tungsten electrode be control effectively.
(2) impact of lower surface analysis external electric field butt welded seam shaping.
The result of the test demonstration, after applying External Electrical Field, it is more straight that weld edge obviously becomes, and the meshing mosaicism of weldering position, location weld seam and mother metal is improved preferably, and welding bead width uniformity significantly improves; Face of weld fineness also gets a new look simultaneously, and seam cross-section presents more obvious circular shape, has effectively eliminated the impression defective that when not applying external electric field, the weld seam centre hands over chance to cause because of dendrite.Above-mentioned appearance of weld extremely is conducive to preventing of undercut defective, is a kind of appearance of weld of High Stable Welding technique.
The improvement of appearance of weld mainly has benefited from applying external electric field has water conservancy diversion stabilising arc effect to the welding main circuit.Make tungsten electrode replenish a large amount of electronic conductances to liquid welding slag 1 owing to applying external electric field, and these electronic conductances directly flow to molten pool metal 4 under External Electrical Field.For the submerged arc welding of direct current reversed polarity, be equivalent to input extra free electron stream as the molten pool metal 4 of negative electrode.Yet molten pool metal 4 is in again in the welding major loop, and negative electrode is further strengthened to the ability of electric arc 3 electron emissions under the effect of electric arc 3 voltages.Mainly concentrate on the inside, molten bath of having accepted electronic conductance due to the cathode electronics emission that increases, and welding arc 3 has the characteristic at Automatic-searching emission of cathode electronics position.Welding arc 3 will concentrate on the position, molten bath more like this.The free electron of molten bath emission simultaneously impels again top, molten bath electron collision neutral particle ionization to occur to strengthen the stability of electric arc 3, and the electric arc 3 that acts on thus the top, molten bath will tend towards stability more, and this obviously is conducive to the molten bath physical dimension and keeps dynamically constant.Thereby the weld edge glacing flatness that forms significantly increases, and greatly eliminated the meshing mosaicism of welding bead and mother metal, extremely is conducive to prevent the undercut defective.Meanwhile, between the slag gold, External Electrical Field is conducive to again in slag in anion and molten bath cation to slag gold interfacial migration.Free electron stream continuously is provided to slag inside due to tungsten electrode, and a large amount of filling into of free electron make Si4 in the molten bath
+, Al
3+, Ca
2+, Ti
4+The oxide forming element is had to accelerate just can keep the charge balance of melt to the migration of slag direction.These cations migrate to slag-interface, molten bath and namely are reduced or enter slag inside and continue to migrate to electrode and be reduced.This directional migration is continued until the molten bath afterbody until welding slag 6 is solidified in formation, thereby the field trash that forms before weld pool solidifies is disperseed effectively.This obviously is conducive to weld metal 7 and forms tiny and field trash that disperse.In this process, be easy to preferentially form at the interface TiO with elements such as strong Ti, the Al of oxygen affinity, Si
2, Al
2O
3, SiO
2Deng the low-surface-energy active material, these low-surface-energy active materials can improve again molten slag preferably in the wetting and spreading performance of face of weld in the weld seam process of setting, therefore are conducive to a certain extent the raising of face of weld fineness.
(3) below, the arc voltage signal is carried out statistical analysis
Fig. 3 is for welding signal of telecommunication analyzer to applying external electric field and do not apply welding arc 3 voltage Real-time Collections under two kinds of conditions of external electric field, and then the probability density distribution curve of the various magnitudes of voltage that count.Shown in Fig. 3 (a), Fig. 3 (b), the electric arc 3 voltage probability distribution densities that go out from the arc voltage signal statistics, applying external electric field posterior probability density profile has left the trend of drift, particularly has certain phenomenon that moves to the low pressure direction as the peak value of parameter probability valuing maximum.Show that the electric conductive carrier in electric arc 3 spaces increases generally, the required Voltage Spontaneous of pilot arc 3 smooth combustions suitably reduces.After applying External Electrical Field simultaneously, the probability in high arc voltage zone is also lower, and this also illustrates and applies the smooth combustion that electric arc 3 voltages after External Electrical Field are easier to pilot arc 3 under low state.In general, electric arc 3 voltages present low value and are accompanied by electric arc 3 spaces and have more conduction carrier, only need lower voltage just be enough to the smooth combustion of pilot arc 3.Otherwise when the conduction carrier in electric arc 3 spaces was not enough, essential electric arc 3 voltages that improve to be strengthening ionization and electron emission effect, smooth combustion that could pilot arc 3.Can further confirm also that from arc voltage Statistical Analysis of Signals result thereby the guide functions of external electric field strengthens to some extent the ability of molten bath electron emission and produces certain stabilising arc effect.
Below schematically the utility model and embodiment thereof are described, this description does not have restricted, and also one of the embodiment created of the utility model just shown in accompanying drawing actually is not limited to this.So, if those of ordinary skill in the art is enlightened by it, in the situation that do not break away from the invention aim, without the creationary scheme similar to this technical scheme and the embodiment of designing, all should belong to the protection domain of the invention.
Claims (4)
1. one kind is utilized between submerged arc welding slag gold with weldering and applies the device that auxiliary external electric field realizes the stabilising arc effect, it comprises welding torch and welding main circuit, it is characterized in that, it also comprises the auxiliary circuit that can form the welding auxiliary electric field, described auxiliary circuit comprises dc source and metallic conduction electrode, the negative pole of described dc source connects the metallic conduction electrode, and positive pole connects base metals (5); Described metallic conduction electrode is tungsten bar.
2. device according to claim 1, it is characterized in that, described tungsten bar is fixed on welding head and with ignition tip with the insulating resin chuck and insulate, the distance between two tips wire tip 5-8mm of described tungsten bar, be provided with clamping on this insulating resin chuck, unclamp knob, be used for tungsten bar is clamped; Described tungsten bar and connecting position of wires are wound around rear the clamping with the copper intermediate plate with wire heart yearn and described tungsten bar.
3. device according to claim 1, is characterized in that, described dc source is the D.C. regulated power supply of 30V/50A.
4. according to claim 2 or 3 described devices, is characterized in that, described tungsten bar diameter is 3.2mm.
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| CN 201220506431 CN202963740U (en) | 2012-09-29 | 2012-09-29 | Device for realizing arc stabilizing effect by utilizing auxiliary external electric field applied between submerged arc welding slag and gold along with welding |
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| CN 201220506431 CN202963740U (en) | 2012-09-29 | 2012-09-29 | Device for realizing arc stabilizing effect by utilizing auxiliary external electric field applied between submerged arc welding slag and gold along with welding |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102873432A (en) * | 2012-09-29 | 2013-01-16 | 南京工程学院 | Device for realizing arc-stabilizing effect by applying auxiliary external electric field between slag and metal of submerged-arc welding with welding and usage of device |
| CN111670084A (en) * | 2018-01-31 | 2020-09-15 | 株式会社神户制钢所 | Single-side submerged arc welding method and single-side submerged arc welding device |
-
2012
- 2012-09-29 CN CN 201220506431 patent/CN202963740U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102873432A (en) * | 2012-09-29 | 2013-01-16 | 南京工程学院 | Device for realizing arc-stabilizing effect by applying auxiliary external electric field between slag and metal of submerged-arc welding with welding and usage of device |
| CN102873432B (en) * | 2012-09-29 | 2014-10-15 | 南京工程学院 | Device for realizing arc-stabilizing effect by applying auxiliary external electric field between slag and metal of submerged-arc welding with welding and usage of device |
| CN111670084A (en) * | 2018-01-31 | 2020-09-15 | 株式会社神户制钢所 | Single-side submerged arc welding method and single-side submerged arc welding device |
| CN111670084B (en) * | 2018-01-31 | 2022-04-15 | 株式会社神户制钢所 | Single-side submerged arc welding method and single-side submerged arc welding device |
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Granted publication date: 20130605 Termination date: 20130929 |