CN107855629A - Pulse resultant field aids in GMAW high-speed welding methods and device - Google Patents

Pulse resultant field aids in GMAW high-speed welding methods and device Download PDF

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Publication number
CN107855629A
CN107855629A CN201711057521.0A CN201711057521A CN107855629A CN 107855629 A CN107855629 A CN 107855629A CN 201711057521 A CN201711057521 A CN 201711057521A CN 107855629 A CN107855629 A CN 107855629A
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welding
pulse
magnetic
gmaw
field
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CN201711057521.0A
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CN107855629B (en
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陈姬
张棪腾
武传松
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Shandong University
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Shandong University
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    • BPERFORMING OPERATIONS; TRANSPORTING
    • B23MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23KSOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K9/00Arc welding or cutting
    • B23K9/16Arc welding or cutting making use of shielding gas
    • B23K9/173Arc welding or cutting making use of shielding gas and of a consumable electrode
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B23MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23KSOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K9/00Arc welding or cutting
    • B23K9/08Arrangements or circuits for magnetic control of the arc
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B23MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23KSOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K9/00Arc welding or cutting
    • B23K9/32Accessories
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B23MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23KSOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K9/00Arc welding or cutting
    • B23K9/32Accessories
    • B23K9/325Devices for supplying or evacuating shielding gas

Abstract

The invention discloses a kind of pulse resultant field auxiliary GMAW high-speed welding methods and device,Device includes the adjustable excited power supply of DC pulse and the compound field generator for magnetic of pulse,The adjustable excited power supply of DC pulse is connected with the compound field generator for magnetic of pulse,The compound field generator for magnetic of pulse includes GMAW welding guns,And it is arranged at the conducting magnet core of its outer,Conducting magnet core includes multiple magnetic poles,Magnetic pole magnetic head is along GMAW welding gun circumferential arrangements,Conducting magnet core top has an angle relative to GMAW welding guns center line,And it is wound with magnet exciting coil,Pass through the amplitude for controlling angle of inclination along welding direction of droplet metal and welding arc and swinging,Frequency and the residence time in weld seam both sides,Realizing, which improves liquid state of molten pool metal, laterally sprawls and flows backward,Under certain welding parameter and magnetic field parameter,Reach the purpose for eliminating undercut and hump defect.

Description

Pulse resultant field aids in GMAW high-speed welding methods and device
Technical field
The present invention relates to a kind of pulse resultant field auxiliary GMAW high-speed welding methods and device.
Background technology
Welding procedure has very important influence to the final mass and production efficiency of equipment manufacture product.At present, Gas metal-arc welding (GMAW) occupy leading position in the application of all kinds of welding techniques.Its speed of welding is improved, is to carry The main path of high welding productivity.But practical production experience proves:After GMAW speeds of welding reach 0.6m/min, weld seam goes out Existing undercut defect;Hump defect can be also induced when speed of welding further improves.Undercut and the appearance of hump defect, serious drop The low mechanical property of joint, limits the raising of speed of welding, turns into the bottleneck that welding productivity improves in enterprise.
Improve electric arc welding technique using externally-applied magnetic field, have the advantages that cost is low, add power consumption less, be easy to operate, As a kind of Advanced Welding Technique.At present, magnetic control high speed TIG weld technique and magnetic-control high efficiency GMAW welding procedures have obtained the stage Property achievement.Patent CN101767246B uses horizontal D.C. magnetic field, controls TIG electric arc forward leaning angles, improves TIG weldering welding speed Degree;The C of patent CN1369347A, CN 100411799, CN104475923 A use longitudinal magnetic field compression arc, and then improve The stability of droplet transfer, improve GMAW deposition efficiencies;CN104816079B produces continuous transverse rotary magnetic using three pairs of electrodes , improve liquid state of molten pool metal and the heat exchange of mother metal and surrounding environment, improve seam organization;CN102725091A is using parallel Magnetic field, promote electric arc to swing laterally, welded for deep groove.But magnetic control high speed GMAW welding procedures are still at an early stage.It is high During fast GMAW, Molten Pool Shape, especially liquid state of molten pool metal are laterally sprawled and the state that flows backward, be determine undercut and The key factor whether hump defect produces.But applicable externally-applied magnetic field device is not yet developed at present and comes while realizes Liquid state of molten pool metal is laterally sprawled and regulated and controled with the specific aim of backward flow regime.
The content of the invention
The present invention is in order to solve the above problems, it is proposed that a kind of pulse resultant field auxiliary GMAW high-speed welding methods and dress Put, the present invention is based on totally digitilized arc-welding, and system occurs using controllable pulse resultant field is combined with welding gun, is adjusted from periodicity Electric arc, the angle of molten drop movement locus are controlled, the transverse direction for improving liquid metal in High Speed Welding molten bath is sprawled and longitudinal flow, is realized same When suppress the target of High Speed Welding undercut and hump defect.
To achieve these goals, the present invention adopts the following technical scheme that:
A kind of pulse resultant field aids in GMAW high-speed welding devices, including the adjustable excited power supply of DC pulse and pulsed reset Field generator for magnetic is closed, the adjustable excited power supply of DC pulse is connected with the compound field generator for magnetic of pulse, the pulsed reset Closing field generator for magnetic includes GMAW welding guns, and is arranged at the conducting magnet core of GMAW welding guns outer, and the conducting magnet core includes Multiple magnetic poles, magnetic pole magnetic head have a folder along GMAW welding gun circumferential arrangements, conducting magnet core top relative to GMAW welding guns center line Angle, and it is wound with magnet exciting coil.
Further, the adjustable excited power supply of the DC pulse for the compound field generator for magnetic of pulse provide two-way waveform, Size, frequency, dutycycle and/or the adjustable direct current pulse power source of biasing.
Further, the magnetic pole is three, and -90 ° of arrangements at 45 ° of magnetic pole magnetic head line.
Further, the angle is 30 ° -60 °, preferably 45 °.
Further, the magnet exciting coil is wound on the outside face of conducting magnet core upper frame.
Further, the conducting magnet core is electromagnetic soft iron.
Welding method based on said apparatus, the compound field generator for magnetic of pulse is held on welding gun protection mouth, direct current The adjustable excited power supply of pulse produce needed for waveform, size, the pulsed field magnetization electric current of frequency and dutycycle, designated direction winding Coil and conducting magnet core effect, at magnetic head and at arc space produce pulse resultant field, to optimize welding arc Position and metamorphosis, by controlling angle of inclination along welding direction of droplet metal and welding arc and swinging Amplitude, frequency and the residence time in weld seam both sides, realizing, which improves liquid state of molten pool metal, laterally sprawls and flows backward, one Under fixed welding parameter and magnetic field parameter, reach the purpose for eliminating undercut and hump defect.
Further, the pulse resultant field produces the pulse point of parallel magnetic field and transverse magnetic field in arc space simultaneously Amount.
Further, when two coil ALT pulses are powered, transverse magnetic field all the time be present to be formed and point to welding front Electromagnetism component, and interval produces parallel magnetic field and makes electric arc, the molten drop electromagnetism along vertical welding direction periodic wobble point to be formed Power.
Further, the welding current of GMAW welding guns is 200A~350A, weldingvoltage 20-35V, protection air-flow amount 15-25L/min, speed of welding 0.6-2.0m/min.
Further, exciting current is 1~15A, and excitation frequency is 1~30Hz.
Compared with prior art, beneficial effects of the present invention are:
(1) existing transverse magnetic field components all the time are included in resultant field caused by the present invention.In additional transverse magnetic field Under effect, welding arc and molten drop movement locus lean forward, and by reducing after liquid metal to flow velocity, promote liquid metal to weld seam Both sides are sprawled, and alleviate High Speed Welding undercut and hump defect;
(2) pulse alternation parallel magnetic field component, the pulse alternation are also included simultaneously in resultant field caused by the present invention Magnetic-field component makes electric arc and molten drop produce and periodically swing, and not only promotes liquid metal periodically laterally to sprawl, while The distribution of arc heat, arc force and droplet entropy on workpiece is improved, realizes effective suppression to undercut and hump defect;
(3) the pulse compound magnetic field comprehensive respective advantage of transverse magnetic field and parallel magnetic field caused by the present invention, can Reduce in molten bath promotes liquid metal periodically to be sprawled to weld seam both sides after liquid metal to flow velocity, and can, i.e. realization pair simultaneously Liquid state of molten pool metal is laterally sprawled to be regulated and controled with the specific aim of backward flow regime, effectively suppresses the undercut of GMAW High Speed Weldings and hump lacks Fall into;
(4) present invention can improve speed of welding on the basis of appearance of weld is improved, obtain the second best in quality weld seam To 2.0m/min, welding production efficiency is improved;
(5) clamping of the present invention acts on the front of workpiece to be welded on Traditional GM AW welding guns, and accessibility is good, is easy to load and unload, And compared to the magnetic control means of back of work to be welded is acted on for, its scope of application is wider, can not pacify in back of work to be welded Fill to have under the operating mode of magnetic control means and have great advantage;
(6) present invention can directly coordinate Traditional GM AW equipment to carry out welding production, without additional auxiliary or Combined Welding Power supply is connect, required equipment is simple, is easy to reequip, cost is low;
(7) present invention has wide range of applications, suitable for the high speed GMAW of thin plate and cut deal welderings and backing welding.
Brief description of the drawings
The Figure of description for forming the part of the application is used for providing further understanding of the present application, and the application's shows Meaning property embodiment and its illustrate be used for explain the application, do not form the improper restriction to the application.
Fig. 1 is that pulse resultant field of the present invention aids in GMAW high-speed welding structure drawing of device;
Fig. 2 is the compound field generator for magnetic structure chart of pulse of the present invention;
Fig. 3 is that the present invention is to produce the oscillogram that pulse resultant field loads current signal;
Fig. 4 magnetic head polarity and electric arc force analysis figure in the case where additional pulsed reset closes magnetic fields for the present invention;
Fig. 5 is the face of weld pattern of the embodiment of the present invention 1;
Fig. 6 is the face of weld pattern of comparative example 1 (no applying pulse resultant field) of the present invention;
Wherein, 1, the compound field generator for magnetic of pulse, 2, the adjustable excited power supply of DC pulse, 3, polymorphic structure magnetic conduction iron Core, 4, magnet exciting coil, 5, magnet exciting coil, 6, conducting magnet core magnetic head end face, 7, conducting magnet core magnetic head end face, 8, conducting magnet core magnetic head End face, 9, GMAW welding guns, 10, clip.
Embodiment:
The invention will be further described with embodiment below in conjunction with the accompanying drawings.
It is noted that described further below is all exemplary, it is intended to provides further instruction to the application.It is unless another Indicate, all technologies used herein and scientific terminology are with usual with the application person of an ordinary skill in the technical field The identical meanings of understanding.
It should be noted that term used herein above is merely to describe embodiment, and be not intended to restricted root According to the illustrative embodiments of the application.As used herein, unless the context clearly indicates otherwise, otherwise singulative It is also intended to include plural form, additionally, it should be understood that, when in this manual using term "comprising" and/or " bag Include " when, it indicates existing characteristics, step, operation, device, component and/or combinations thereof.
In the present invention, term as " on ", " under ", "left", "right", "front", "rear", " vertical ", " level ", " side ", The orientation or position relationship of instructions such as " bottoms " are based on orientation shown in the drawings or position relationship, only to facilitate describing this hair Bright each part or component structure relation and the relative determined, not refer in particular to either component or element in the present invention, it is impossible to understand For limitation of the present invention.
In the present invention, term such as " affixed ", " connected ", " connection " should be interpreted broadly, and expression can be fixedly connected, Can also be integrally connected or be detachably connected;Can be joined directly together, can also be indirectly connected by intermediary.For The related scientific research of this area or technical staff, the concrete meaning of above-mentioned term in the present invention can be determined as the case may be, It is not considered as limiting the invention.
As background technology is introduced, existing in the prior art can not simultaneously realize liquid state of molten pool metal is laterally sprawled Regulate and control with the specific aim of backward flow regime, and appearance of weld deficiency of problems, in order to solve technical problem as above, this Application proposes the compact inexpensive controllable pulse resultant field of a set of mechanism and system occurs, and is combined with welding gun, from periodically Regulate and control electric arc, the angle of molten drop movement locus, the transverse direction for improving liquid metal in High Speed Welding molten bath is sprawled and longitudinal flow, is realized Suppress the target of High Speed Welding undercut and hump defect simultaneously, during final speed of welding 1.5m/min, weld seam lacks without undercut and hump Fall into;During speed of welding 2.0m/min, no hump defect, welding quality grade meets ISO5817 standard peak demands.
The invention provides a kind of resultant field regulation device for high speed GMAW welding, the device can realize that magnetic field is big The regulation of small, magnetic direction, magnetic field pulse frequency.The invention can realize GMAW welding current 200A-350A, arc voltage Under the welding parameter such as 20V-35V, exciting current 1-15A, excitation pulse frequency 1-30Hz, maximum welding speed is up to 2.0m/ Min, no-welding-seam forming defects.The present invention is applied to thin plate and the high speed GMAW welderings of cut deal and backing welding.
The high speed GMAW compound magnetic control means of pulse is by the adjustable excited power supply of DC pulse, conducting magnet core, magnet exciting coil structure Into.Field power supply is two-way waveform, size, frequency, dutycycle, the adjustable direct current pulse power source of biasing;The conducting magnet core is Polymorphic structure, it is made up of three magnetic poles, magnetic pole magnetic head line -90 ° of arrangements at 45 °, core material selects electromagnetic soft iron.Iron core knot Structure is:Bottom head configuration is square (but being not limited to square), and top conducting magnet core curves 45 ° of angle, and magnet exciting coil, which is wound on, leads On the outside face of magnetic core.By this design, magnetic generating means volume can be effectively reduced, improves access for welding.
During High Speed Welding, as needed, the compound field generator for magnetic of pulse is held on welding gun protection mouth.Direct current arteries and veins The pulsed field magnetization electric current of waveform needed for adjustable excited power supply generation, size, frequency and dutycycle is rushed, designated direction winding Coil and iron core effect, produce a pulse resultant field, the resultant field can be in electric arc at magnetic head and at arc space Space produces the pulse component of parallel magnetic field and transverse magnetic field simultaneously, and then optimizes position and the form of welding arc, has simultaneously Effect control optimization droplet metal and welding arc along welding direction lean forward (or hypsokinesis) angle and swing amplitude, frequency It is rate and the residence time in weld seam both sides, final to realize that improving liquid state of molten pool metal laterally sprawls and flow backward, certain Welding parameter and magnetic field parameter under, reach the purpose for eliminating undercut and hump defect.
Pulse resultant field caused by magnetic generating means is made up of existing transverse magnetic field all the time and pulse parallel magnetic field, The electric current for being passed through coil is as shown in Figure 3.Magnetic head polarity and caused electromagnetic force are as shown in Figure 4.When 4 coil electricity, three Magnetic head (6,7,8) polarity is respectively S poles, N poles, N poles, magnetic field and the power of caused electromagnetic force after arcing between 6,7 magnetic heads It can be analyzed to point to the component in welding front and the component in vertical welding direction, between 6,8 magnetic heads after magnetic field and arcing, The electromagnetic force for pointing to welding front is produced, the action effect of electromagnetic force makes electric arc and molten drop be leaned forward by set angle and is inclined to weld seam Side;When 5 coil electricity, 6,7,8 magnetic head polarity are respectively S poles, S poles, N poles, between 7,8 magnetic heads after magnetic field and arcing The power of caused electromagnetic force can be analyzed to point to the component in welding front and the component in vertical welding direction, between 6,8 magnetic heads With after arcing, producing the electromagnetic force for pointing to welding front, the action effect of electromagnetic force makes electric arc and molten drop by setting in magnetic field Angle leans forward and is inclined to weld seam opposite side.Therefore when two coil ALT pulses are powered, transverse magnetic field all the time be present and referred to being formed To welding front electromagnetism component, and interval produce parallel magnetic field with formed make electric arc, molten drop along vertical welding direction periodically The electromagnetism component of swing.
Magnetic control method applied to the magnetic control means of high speed GAMW welding is realized according to the following steps:
Step 1: on the basis of Traditional GM AW welding systems, pulse resultant field is installed on the protection mouth of welding gun Generating means simultaneously connects pulse resultant field regulation device;
Step 2: the regulation compound magnetic field adjusting device relevant parameter of pulse, wherein, the exciting current ripple of the magnetic control means Shape is pulse current waveform, and exciting current is 1~15A, and excitation frequency is 1~30Hz.
Step 3: the electric arc for applying protective gas and igniting between welding wire and workpiece to be welded starts to weld;Wherein, GMAW is welded It is 200A~350A, weldingvoltage 20-35V, protection air-flow amount 20L/min, speed of welding 0.6-2.0m/min to connect electric current.
As a kind of exemplary embodiment, as shown in Figure 1 and Figure 2, the compound field generator for magnetic of pulse includes 3 polymorphic structures Conducting magnet core, the high temperature resistant red copper wire that 4,5 magnet exciting coils are line footpath 1mm is close around 300 circles on 3 polymorphic structure conducting magnet core surfaces, 3 polymorphic structure conducting magnet cores are clamped together by 10 clips and 9GMAW welding guns, the adjustable excited power supply of 2 DC pulses can Two-way waveform, size, frequency, dutycycle, phase difference, the adjustable pulse current of biasing are produced, will be adjusted by magnetic field circuit for regulating and controlling Current signal after control is loaded on the compound magnetic field generator 1 of pulse by wire, obtains the resultant field of design.
Required according to the material of welding workpiece, thickness of slab and speed of welding, select GMAW welding conditions, such as weld electricity Stream, arc voltage, protection gas species, flow, stem elongation etc..
Adjust the adjustable excited power supply relevant parameter of DC pulse, as waveform, size of current, frequency, dutycycle, phase difference, Biasing etc..
Exciting current caused by the adjustable excited power supply of DC pulse is supplied into magnet exciting coil, magnet exciting coil produces magnetic field, applied The electric arc for adding protective gas and igniting between welding wire and workpiece to be welded starts to weld.
Embodiment 1:Pulse resultant field aids in GMAW high-speed welding techniques, with the present embodiment device, is produced by adjusting Current waveform regulation caused by resultant field, the externally-applied magnetic field after regulation and control is acted in welding process.Welding workpiece uses 250 × 70 × 5mm Q235 steel plates, the GMAW sources of welding current are adjusted, adjust welding current 275A, weldingvoltage 32.5V;Regulation is straight Current waveform is adjusted to two-way impulse waveform, size 5A, frequency 18Hz, dutycycle 50%, phase difference by stream pulse regulated power supply 180 ° of current signal, under speed of welding 1.5m/min, welded in the case of externally-applied magnetic field.
Comparative example 1
Using 250 × 70 × 5mm Q235 steel plates, with the existing GMAW sources of welding current, with the complete phase of the welding parameter of embodiment 1 Together, difference is to be not added with applying pulse resultant field.
As shown in Figure 5 and Figure 6, the welding effect of embodiments of the invention 1 is substantially better than comparative example 1.
The preferred embodiment of the application is the foregoing is only, is not limited to the application, for the skill of this area For art personnel, the application can have various modifications and variations.It is all within spirit herein and principle, made any repair Change, equivalent substitution, improvement etc., should be included within the protection domain of the application.
Although above-mentioned the embodiment of the present invention is described with reference to accompanying drawing, model not is protected to the present invention The limitation enclosed, one of ordinary skill in the art should be understood that on the basis of technical scheme those skilled in the art are not Need to pay various modifications or deformation that creative work can make still within protection scope of the present invention.

Claims (10)

1. a kind of pulse resultant field aids in GMAW high-speed welding devices, it is characterized in that:Including the adjustable excited power supply of DC pulse With the compound field generator for magnetic of pulse, the adjustable excited power supply of DC pulse is connected with the compound field generator for magnetic of pulse, institute Stating the compound field generator for magnetic of pulse includes GMAW welding guns, and is arranged at the conducting magnet core of GMAW welding guns outer, the magnetic conduction Iron core includes multiple magnetic poles, and magnetic pole magnetic head is along GMAW welding gun circumferential arrangements, and conducting magnet core top is relative to GMAW welding gun center lines With an angle, and it is wound with magnet exciting coil.
2. a kind of pulse resultant field auxiliary GMAW high-speed welding devices as claimed in claim 1, it is characterized in that:The direct current The adjustable excited power supply of pulse provides two-way waveform, size, frequency, dutycycle and/or biasing for the compound field generator for magnetic of pulse Adjustable direct current pulse power source.
3. a kind of pulse resultant field auxiliary GMAW high-speed welding devices as claimed in claim 1, it is characterized in that:The magnetic pole For three, and -90 ° of arrangements at 45 ° of magnetic pole magnetic head line.
4. a kind of pulse resultant field auxiliary GMAW high-speed welding devices as claimed in claim 1, it is characterized in that:The angle For 30 ° -60 °.
5. a kind of pulse resultant field auxiliary GMAW high-speed welding devices as claimed in claim 1, it is characterized in that:The excitation Coil is wound on the outside face of conducting magnet core upper frame.
6. based on the welding method of the device as any one of claim 1-5, it is characterized in that:Pulse resultant field is sent out Generating apparatus is held on welding gun protection mouth, waveform, size, frequency and dutycycle needed for the adjustable excited power supply generation of DC pulse Pulsed field magnetization electric current, the coil of designated direction winding and conducting magnet core effect are produced at magnetic head and at arc space Raw pulse resultant field, to optimize the position of welding arc and metamorphosis, by controlling droplet metal and welding arc along weldering Amplitude, frequency and the residence time in weld seam both sides for connecing the angle of inclination in direction and swinging, realizing improves molten bath Liquid metal is laterally sprawled and flowed backward, under certain welding parameter and magnetic field parameter, reaches elimination undercut and hump lacks Sunken purpose.
7. welding method as claimed in claim 6, it is characterized in that:The pulse resultant field produces flat simultaneously in arc space Row magnetic field and the pulse component of transverse magnetic field.
8. welding method as claimed in claim 6, it is characterized in that:When two coil ALT pulses are powered, exist all the time laterally The electromagnetism component in welding front is pointed in magnetic field to be formed, and interval produces parallel magnetic field and makes electric arc, molten drop along vertical welding to be formed Connect the electromagnetism component of direction periodic wobble.
9. welding method as claimed in claim 6, it is characterized in that:The welding current of GMAW welding guns is 200A~350A, welding Voltage is 20-35V, protection air-flow amount 15-25L/min, speed of welding 0.6-2.0m/min.
10. welding method as claimed in claim 6, it is characterized in that:Exciting current is 1~15A, and excitation frequency is 1~30Hz.
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CN109759686A (en) * 2019-03-22 2019-05-17 哈尔滨工业大学(威海) A kind of resistance spot welding method under controllable rotating magnetic fields
CN110625226A (en) * 2019-10-08 2019-12-31 华南理工大学 K-TIG deep fusion welding control system and method under action of composite magnetic field
CN111168194A (en) * 2020-01-14 2020-05-19 佛山国防科技工业技术成果产业化应用推广中心 Quadrupole magnetic field based method for controlling electric arc additive manufacturing and quadrupole magnetic field system
CN112351534A (en) * 2020-10-27 2021-02-09 共享装备股份有限公司 Electromagnetic preheating device for welding
CN112975072A (en) * 2021-04-08 2021-06-18 山东大学 Method and system for assisting aluminum alloy/steel dissimilar metal melting and brazing by using additional alternating magnetic field
CN114346381A (en) * 2022-01-12 2022-04-15 湘潭大学 Magnetic control arc control method and device based on multi-pole sharp-corner magnetic field
CN115815749A (en) * 2022-11-16 2023-03-21 湘潭大学 Method and device for controlling magnetic control arc of special-shaped sharp-corner magnetic field based on five magnetic poles
CN117001109A (en) * 2023-08-22 2023-11-07 广东福维德焊接股份有限公司 9Ni steel deep-melting arc welding magnetic control power supply system and control method
CN115815749B (en) * 2022-11-16 2024-05-10 湘潭大学 Five-pole-based abnormal sharp-corner magnetic field magnetic control arc control method and device

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Publication number Priority date Publication date Assignee Title
CN109759686A (en) * 2019-03-22 2019-05-17 哈尔滨工业大学(威海) A kind of resistance spot welding method under controllable rotating magnetic fields
CN110625226A (en) * 2019-10-08 2019-12-31 华南理工大学 K-TIG deep fusion welding control system and method under action of composite magnetic field
WO2021068715A1 (en) * 2019-10-08 2021-04-15 华南理工大学 Welding control system and method for k-tig deep penetration welding under action of resultant magnetic field
CN110625226B (en) * 2019-10-08 2021-05-18 华南理工大学 K-TIG deep fusion welding control system and method under action of composite magnetic field
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