CN105234539B - The plasma arc welding (PAW) connection device and technique of a kind of ultrasonic wave added perforation - Google Patents
The plasma arc welding (PAW) connection device and technique of a kind of ultrasonic wave added perforation Download PDFInfo
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- CN105234539B CN105234539B CN201510796790.3A CN201510796790A CN105234539B CN 105234539 B CN105234539 B CN 105234539B CN 201510796790 A CN201510796790 A CN 201510796790A CN 105234539 B CN105234539 B CN 105234539B
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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
- B23K10/00—Welding or cutting by means of a plasma
- B23K10/02—Plasma welding
- B23K10/025—Plasma welding by making use of electrode vibrations
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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
- B23K2101/00—Articles made by soldering, welding or cutting
- B23K2101/18—Sheet panels
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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
- B23K2103/00—Materials to be soldered, welded or cut
- B23K2103/02—Iron or ferrous alloys
- B23K2103/04—Steel or steel alloys
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- Arc Welding In General (AREA)
Abstract
The present invention relates to the plasma arc welding (PAW) connection device and technique of a kind of perforation of ultrasonic wave added.The technique is under the conditions of PLASMA ARC WELDING, to be connected with the close-coupled of tungsten electrode in plasma (welding) torch by ultrasonic amplitude transformer, and power ultrasonic vibration is applied directly on plasma arc by tungsten electrode, strengthens the thermodynamic activity of plasma arc.Meanwhile, part ultrasonic vibrational energy is delivered in the molten bath on workpiece by plasma arc, has influence on heat transfer and the flow behavior in molten bath.Effect of both due to more than, compared with common PLASMA ARC WELDING technique, plasma arc energy density of the invention and deflection are further enhanced, and improve the piercing capability of plasma arc, have widened the technological parameter nargin for obtaining quality weld.Postwelding gained welding joint structure is fine and close, gas evolution is thorough, crystal grain refinement, alloying elements distribution are uniform, and the mechanical property of joint is improved.
Description
Technical field
The present invention relates to the plasma arc welding (PAW) connection device and technique of a kind of perforation of ultrasonic wave added, belong to high efficiency plasma arc-welding
Connect technology field.
Background technology
PLASMA ARC WELDING (Plasma Arc Welding, abbreviation PAW) is a kind of advanced Welder of high-energy-density
Skill technology.For medium plate, in the case of square groove, perforation type PLASMA ARC WELDING can be penetrated once, single welding
Two-sides forming.During conventional PLASMA ARC WELDING, aperture is to process conditions sensitive；The minor fluctuations of technological parameter are just
It is likely to result in aperture closure or molten bath collapses, the reasonable standard parameter area for obtaining good joint quality is narrow, adjustable nargin is small.
Power ultrasonic has the features such as frequency is high, penetration capacity is strong and can change physical property.There is ultrasound to shake at present
The application technology in arc welding is moved, as disclosed in Chinese patent CN101219499A《A kind of ultrasonic wave and non-melt pole electrical arc
Compound welding method》, by ul-trasonic irradiation on TIG electric arcs, TIG electric arcs there occurs substantially contraction, illustrate ultrasonic vibration energy
Effectively improve the energy density of electric arc.But, non-melt electrode is embedded in ultrasonic transformer in this invention, inconvenience dismounting, replacing, limit
The application of the method is made；TIG electric arcs work in thermal conductivity weldering (fusing into type) pattern, and aperture can not be produced in molten bath.Additionally, Chinese
Disclosed in patent CN1583340A《A kind of titanium alloy welding method based on arc-ultrasonic》, using high frequency pulse current welding electric current pair
Electric arc implements high frequency modulated, and arc-ultrasonic is motivated using the resistive load characteristic of the change of electric arc.Electric arc, will used as ultrasonic occurring source
Ultrasonic vibration acts on welding pool.But, this method by the use of electric arc as ultrasonic occurring source, it is desirable to which welding current reaches
It is enough to produce the frequency of ultrasonic vibration, bad adaptability very high to source of welding current requirement in itself；Meanwhile, electric arc works in thermal conductivity
Weldering (fusing into type) pattern, can not produce aperture in molten bath, by the conduction of heat penetration mother metal of molten pool metal, realize through welding.Cause
This is mainly used in the welding of thin plate (0.5~below 2.5mm), the welding of the later each layer of multilayer welding backing run and angle welding
Welding.
The content of the invention
It is contemplated that overcoming the deficiencies in the prior art, there is provided a kind of plasma arc welding (PAW) connection device of ultrasonic wave added perforation with
Technique, is connected by ultrasonic amplitude transformer with the close-coupled of tungsten electrode in plasma (welding) torch, by power ultrasonic vibration by tungsten electricity
Pole is applied directly on plasma arc, and ultrasound parameter and welding condition matchs, improve heat-power effect of plasma arc with
The heat transfer in molten bath and flow behavior.Reach the piercing capability for improving plasma arc, the purpose for widening applicable technological parameter.
To realize object above, the present invention uses following technical scheme：
A kind of plasma arc welding (PAW) connection device of ultrasonic wave added perforation, including ultrasonic vibration and conduction unit, the ultrasound are shaken
Dynamic and conduction unit includes the supersonic generator, ultrasonic transducer and the ultrasonic transformer that are sequentially connected, the ultrasonic transducer
It is fixedly connected with one end of ultrasonic transformer by connector.The other end of the ultrasonic transformer sets and tungsten is set in cavity, the cavity
The gripping section of electrode, the ultrasonic transformer is connected with the gripping section of tungsten electrode by detachable mechanism close-coupled, the ultrasonic transformer
Insulating materials is provided with and the gripping section of tungsten electrode between.The non-clamping section of the tungsten electrode is connected with PLASMA ARC WELDING power supply,
The non-clamping section of the tungsten electrode is outside to set plasma gun gun body.
The workflow of welder of the present invention is as follows：First, industrial-frequency alternating current after supersonic generator by being converted to
Superaudible alternating current.Then, superaudible alternating current is converted into ultrasonic mechanical vibration by ultrasonic transducer.By luffing
The focusing and amplification of bar, form power ultrasonic vibration, and be delivered on tungsten electrode.And then article on plasma arc, welding pool and
Aperture is acted.
Ultrasonic transformer is that tungsten electrode can be dismantled with the connection of ultrasonic transformer with the advantage of the design that is of coupled connections of tungsten electrode,
Tungsten electrode extension can as needed be adjusted or the tungsten electrode of different model is changed.Therefore, welding gun to different model and
The selection of different welding conditions has good adaptability.
Be provided between ultrasonic transformer and tungsten electrode it is a kind of with insulation, it is adiabatic, can conducted power ultrasonic vibration material, realize
Ultrasound circuitry is efficiently separated with PLASMA ARC WELDING circuit, while the high temperature of tungsten electrode is not transferred on ultrasonic transformer, it is ensured that
Ultrasonic transformer is in normal working temperature scope.
The tungsten electrode is specially designed, can be assembled with plasma (welding) torch gun body, realizes PLASMA ARC WELDING.
On the basis of plasma (welding) torch, Butt welding gun is designed and transforms, and is disposed at tungsten electrode non-clamping section
Outside.The length of tungsten electrode, diameter can carry out matching selection according to welding procedure needs and welding gun gun body.Ensure that
On the basis of plasma (welding) torch normal work, by tungsten electrode by power ultrasonic conduct vibrations to plasma arc.
Preferably, the tungsten electrode gripping section is bolted in the ultrasonic transformer cavity.Ensure that power ultrasonic shakes
Kinetic energy is delivered on tungsten electrode by the attachment structure.
It is further preferred that the both sides of the ultrasonic transformer cavity are cracked, the bolt is two, and two bolts are each passed through
Both sides are cracked, and with nut screw connection, the tungsten electrode gripping section that will be located in ultrasonic transformer cavity is clamped.Ensure that ultrasonic transformer presss from both sides tungsten electrode
Hold section clamping.
Preferably, tungsten electrode material is tungsten alloy, and preferably material is cerium tungsten alloy or thorium tungsten alloy.
Preferably, the piezo-electric type ultrasonic transduction that the ultrasonic transducer is constituted using piezoelectric ceramics and front and rear alloy cover plate
Device.The ultrasonic transformer can select aluminium alloy, titanium alloy or steel alloy.
The invention further relates to a kind of PLASMA ARC WELDING technique of ultrasonic wave added perforation, the technique is auxiliary using the ultrasound
Help the plasma arc welding (PAW) connection device of perforation to be welded, realized by following steps：
(1) industrial-frequency alternating current is by being converted to superaudible alternating current after supersonic generator, by ultrasonic transducer
It is converted into ultrasonic mechanical vibration.
(2) energy of ultrasonic transducer is focused and amplified by ultrasonic transformer, amplification and focusing shape by ultrasonic transformer
Power ultrasonic into certain frequency and amplitude vibrates.Ensure that the ultrasound that tungsten electrode is exported is shaken by the overall dimensions for designing ultrasonic transformer
Dynamic frequency, the power size for needed for.
(3) ultrasonic transformer and tungsten electrode close-coupled, the power ultrasonic vibration of ultrasonic transformer are sent to tungsten electrode by gripping section
On.
(4) PLASMA ARC WELDING power supply is connected with the non-clamping section of tungsten electrode, plasma gun gun body is arranged on tungsten
The non-clamping section of electrode is outside.Needed according to welding procedure and welding gun gun body carries out length, diameter of the matching from tungsten electrode.
(5) when welding, Plasma Welding power input welding current, plasma arc gun body input ion-gas, tungsten electrode is produced
Raw plasma arc, and plasma arc, welding pool and aperture are acted on by the ultrasonic vibration that ultrasonic transformer is transmitted.
In the step (1), supersonic generator power output is 1~2000W.
In the step (2), the power ultrasonic vibration frequency after amplification is 15KHz~100KHz, and amplitude is 10~100 μ
m。
In the step (5), welding current is 50~500A.
In the step (5), ion-gas species is argon gas, argon helium gas mixture, and ion-gas flow is 1~10L/min.
Welding condition (welding current, speed of welding, ion-gas flow) and ultrasound parameter in the present invention (frequency, shake
Width, power) coupling matching is reached in an optimized way, to ensure welding process stability and high efficiency, obtain good quality solder joints.
The PLASMA ARC WELDING technique of this kind of ultrasonic wave added perforation can realize the materials such as stainless steel, low-alloy high-strength steel
Welding.
The beneficial effects of the invention are as follows：On the basis of plasma (welding) torch, Butt welding gun is designed and transforms the present invention,
On the basis of it ensure that plasma (welding) torch normal work, by the tungsten electrode that redesigns by power ultrasonic conduct vibrations
Onto plasma arc.Apply after power ultrasonic vibration, enhance the heat-power effect of plasma arc, arc column diameter is obtained into one
The compression of step, deflection can also be improved.Power ultrasonic vibration simultaneously is delivered in molten bath by electric arc, in the effect of power ultrasonic
Under, aperture has stronger adaptability with molten bath.The plasma arc welding process of power ultrasonic vibration auxiliary is more stablized,
Also the welding condition nargin for forming stabilization perforation has been widened.
(1) tungsten electrode of the present invention is with the advantage of the design that is of coupled connections of ultrasonic transformer, the connection of tungsten electrode and ultrasonic transformer
Can dismantle, can as needed adjust tungsten electrode extension or change the tungsten electrode of different model.Therefore, the present invention is not to
The selection of the welding gun of same model and different welding conditions has good adaptability.PLASMA ARC WELDING circuit and power
Ultrasound circuitry is disconnected from each other, can respectively carry out parameter regulation.
(2) effect of power ultrasonic vibration is mainly reflected in the present invention, is vibrated by power ultrasonic, and increase electric arc is radially
Compression degree, improve the deflection of electric arc, the heat of electric arc more concentrates, and improves the stability of electric arc, enhances plasma
The heat of arc-power effect.When experimental measurements display is using identical big welding current during welding, after applying power ultrasonic vibration,
Energy density can improve about 30%.Equal thickness workpiece, welding current needed for formation perforation can decline 20% after applying ultrasonic vibration
~30%.
(3) present invention has plasma arc welding (PAW) welding process stabilization, appearance of weld good, and improves wearing for plasma arc
Hole ability and aperture stabilization holding capacity.
(4) (frequency, shaken by welding condition (welding current, speed of welding, ion-gas flow) and ultrasound parameter
Width, power) optimization coupling matching, widened formed perforation welding condition scope.
(5) by arcing, the stomatal number in molten bath and aperture hole wall, postwelding gained weld seam is almost complete for ultrasonic vibration
Disappear, joint microstructure crystal grain refinement, alloying component is evenly distributed, and improves the military service performance of welding point.Reducing welding should
Power and deformation.Improve welding quality and efficiency.
Brief description of the drawings
Fig. 1 is the PLASMA ARC WELDING schematic device of ultrasonic wave added perforation of the present invention.
In figure：1st, ultrasonic transducer, 2, ultrasonic transformer, 3, tungsten electrode, 4, plasma gun gun body, 5, plasma arc, 6,
Workpiece, 7, PLASMA ARC WELDING power supply, 8, supersonic generator.
Specific embodiment
The present invention is further described with reference to the accompanying drawings and examples.
As shown in figure 1, a kind of plasma arc welding (PAW) connection device of ultrasonic wave added perforation, including ultrasonic vibration and conduction unit,
The ultrasonic vibration and conduction unit include the supersonic generator 8, ultrasonic transducer 1 and the ultrasonic transformer 2 that are sequentially connected, ultrasound
Wave transducer 1 is closely connected by stud with one end of ultrasonic transformer 2.The other end end of ultrasonic transformer 2 cut open and central openings with
Just tungsten electrode 3 is clamped, while being fastened using two hexagon socket head cap screws, making can be super with conducted power between tungsten electrode 3 and ultrasonic transformer 2
Acoustic vibration.And apply between it is a kind of with insulation, it is adiabatic, can conducted power ultrasonic vibration material, realize ultrasound
Circuit is efficiently separated with PLASMA ARC WELDING circuit, while the high temperature of tungsten electrode is not transferred on ultrasonic transformer, it is ensured that luffing
Bar is in normal working temperature scope.
The non-clamping section of tungsten electrode 3 is connected with PLASMA ARC WELDING power supply 7, outside setting of non-clamping section of tungsten electrode 3 etc.
Ion welding gun gun body 4.
The present embodiment further relates to a kind of PLASMA ARC WELDING technique of ultrasonic wave added perforation, uses ultrasound as shown in Figure 1
Aid in the plasma arc welding (PAW) connection device of perforation to be welded, realized by following steps：
(1) industrial-frequency alternating current is by being converted to superaudible alternating current after supersonic generator, and supersonic generator 8 is by work
Frequency electric current is input to generation mechanical ultrasonic vibration, supersonic generator output in ultrasonic transducer 1 after being converted into supersonic frequency electric current
Power is 1~2000W.
(2) energy of ultrasonic transducer is focused and amplified by ultrasonic transformer, amplification and focusing shape by ultrasonic transformer 2
It is 15KHz~100KHz into frequency, amplitude is 10~100 μm of power ultrasonic vibration.By the overall dimensions for designing ultrasonic transformer
Ensure tungsten electrode output ultrasonic vibration frequency, power for needed for size.
(3) other end end of ultrasonic transformer 2 is cut open and in central openings to clamp tungsten electrode 3, while using in two six
Corner bolt is fastened, and the power ultrasonic vibration of tungsten electrode 3 and the close-coupled of ultrasonic transformer 2, ultrasonic transformer 2 is sent to tungsten by gripping section
On electrode 3.
(4) PLASMA ARC WELDING power supply 7 is connected with the non-clamping section of tungsten electrode 3, plasma gun gun body 4 is arranged on
The non-clamping section of tungsten electrode 3 is outside.Needed according to welding procedure and welding gun gun body carries out length, straight of the matching from tungsten electrode
Footpath.
(5) when welding, the welding current of the input of Plasma Welding power supply 7 is 50~500A, the input of plasma arc gun body 4
Ion-gas species is argon gas, argon helium gas mixture, and ion-gas flow is 1~10L/min.Power ultrasonic vibration is made by tungsten electrode 3
Use on plasma arc 5, and be delivered in the molten bath on workpiece 6 by plasma arc 5, molten bath and aperture therein are produced
Effect.
On the basis of plasma (welding) torch, Butt welding gun is designed and transforms the present embodiment, ensure that plasma
On the basis of arc welding torch normal work, by the tungsten electrode of redesign by power ultrasonic conduct vibrations to plasma arc.Apply
Plus after power ultrasonic vibration, the heat-power effect of plasma arc being enhanced, arc column diameter is further compressed, deflection
Can improve.Power ultrasonic vibration simultaneously is delivered in molten bath by electric arc, and in the presence of power ultrasonic, aperture has with molten bath
Stronger adaptability.The plasma arc welding process of power ultrasonic vibration auxiliary is more stablized, and has also widened formation stabilization
The welding condition nargin of perforation.
The present embodiment tungsten electrode is with the advantage of the design that is of coupled connections of ultrasonic transformer, the connection energy of tungsten electrode and ultrasonic transformer
Enough dismountings, can as needed adjust tungsten electrode extension or change the tungsten electrode of different model.Therefore, the present invention is to difference
The selection of the welding gun of model and different welding conditions has good adaptability.PLASMA ARC WELDING circuit surpasses with power
Acoustic-electric road is disconnected from each other, can respectively carry out parameter regulation, has widened the technological parameter nargin for obtaining quality weld.
The effect of power ultrasonic vibration is mainly reflected in the present embodiment, is vibrated by power ultrasonic, and increase electric arc is radially
Compression degree, improve the deflection of electric arc, the heat of electric arc more concentrates, and improves the stability of electric arc, enhances plasma
The heat of arc-power effect.When experimental measurements display is using identical big welding current during welding, after applying power ultrasonic vibration,
Energy density can improve about 30%.Equal thickness workpiece, welding current needed for formation perforation can decline 20% after applying ultrasonic vibration
~30%.
The present embodiment has plasma arc welding (PAW) welding process stabilization, appearance of weld good, and improves wearing for plasma arc
Hole ability and aperture stabilization holding capacity.
By to welding condition (welding current, speed of welding, ion-gas flow) and ultrasound parameter (frequency, amplitude,
Power) optimization coupling matching, widened formed perforation welding condition scope.
By arcing, the stomatal number in molten bath and aperture hole wall, postwelding gained weld seam almost disappears completely for ultrasonic vibration
Lose, joint microstructure crystal grain refinement, alloying component is evenly distributed, and improves the military service performance of welding point.Reduce welding stress
And deformation.Improve welding quality and efficiency.
Although above-mentioned be described with reference to accompanying drawing to specific embodiment of the invention, not to present invention protection model
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 the various modifications made by paying creative work or deformation still within protection scope of the present invention.
Claims (9)
1. the PLASMA ARC WELDING technique that a kind of ultrasonic wave added is perforated, it is characterized in that, realized by following steps：
(1) industrial-frequency alternating current is converted by being converted to superaudible alternating current after supersonic generator by ultrasonic transducer
It is ultrasonic mechanical vibration；
(2) energy of ultrasonic transducer is focused and amplified by ultrasonic transformer, and one is formed by the amplification and focusing of ultrasonic transformer
The power ultrasonic for determining frequency and amplitude vibrates, and ensures ultrasonic vibration that tungsten electrode exports frequently by the overall dimensions for designing ultrasonic transformer
Rate, the power size for needed for；
(3) ultrasonic transformer and tungsten electrode close-coupled, the power ultrasonic vibration of ultrasonic transformer are sent on tungsten electrode by gripping section；
(4) PLASMA ARC WELDING power supply is connected with the non-clamping section of tungsten electrode, plasma gun gun body is arranged on tungsten electrode
Non-clamping section it is outside, needed according to welding procedure and welding gun gun body carry out length, diameter of the matching from tungsten electrode；
(5) when welding, Plasma Welding power input welding current, plasma arc gun body input ion-gas, tungsten electrode generation etc.
Ion arc, and plasma arc, welding pool and aperture are acted on by the ultrasonic vibration that ultrasonic transformer is transmitted；
Employ the plasma arc welding (PAW) connection device of ultrasonic wave added perforation, including ultrasonic vibration and conduction unit, the ultrasonic vibration
And conduction unit includes the supersonic generator, ultrasonic transducer and the ultrasonic transformer that are sequentially connected, the ultrasonic transducer leads to
Connector is crossed to be fixedly connected with one end of ultrasonic transformer；The other end of the ultrasonic transformer sets and set in cavity, the cavity tungsten electricity
The gripping section of pole, the ultrasonic transformer is connected with the gripping section of tungsten electrode by detachable mechanism close-coupled, the ultrasonic transformer with
Insulating materials is provided between the gripping section of tungsten electrode；The non-clamping section of the tungsten electrode is connected with PLASMA ARC WELDING power supply, institute
State the outside setting plasma gun gun body of non-clamping section of tungsten electrode.
2. the PLASMA ARC WELDING technique that a kind of ultrasonic wave added as claimed in claim 1 is perforated, it is characterized in that, the tungsten electrode
Gripping section is bolted in the ultrasonic transformer cavity.
3. the PLASMA ARC WELDING technique that a kind of ultrasonic wave added as claimed in claim 1 is perforated, it is characterized in that, the ultrasonic wave
The piezo-electric type ultrasonic transducer that transducer is constituted using piezoelectric ceramics and front and rear alloy cover plate；The ultrasonic transformer can be closed with aluminium
Gold, titanium alloy or steel alloy.
4. the PLASMA ARC WELDING technique that a kind of ultrasonic wave added as claimed in claim 1 is perforated, it is characterized in that, tungsten electrode material
It is tungsten alloy.
5. the PLASMA ARC WELDING technique that a kind of ultrasonic wave added as claimed in claim 4 is perforated, it is characterized in that, tungsten electrode material
It is cerium tungsten alloy or thorium tungsten alloy.
6. the PLASMA ARC WELDING technique that a kind of ultrasonic wave added as described in Claims 1 to 5 is any is perforated, it is characterized in that, institute
State in step (2), the power ultrasonic vibration frequency after amplification is 15KHz~100KHz, amplitude is 10~100 μm.
7. the PLASMA ARC WELDING technique that a kind of ultrasonic wave added as described in Claims 1 to 5 is any is perforated, it is characterized in that, institute
State in step (5), welding current is 50~500A.
8. the PLASMA ARC WELDING technique that a kind of ultrasonic wave added as described in Claims 1 to 5 is any is perforated, it is characterized in that, institute
State in step (5), ion-gas species is argon gas, argon helium gas mixture, ion-gas flow is 1~10L/min.
9. a kind of PLASMA ARC WELDING technique of ultrasonic wave added perforation as described in any one of claim 1~8 is in stainless steel, low
Application in the welding of the materials such as alloy high-strength steel.
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| CN108339987B (en) * | 2018-03-01 | 2020-02-14 | 常熟理工学院 | Method for connecting carbon fiber composite material and magnesium alloy material |
| CN108857112B (en) * | 2018-07-18 | 2024-08-13 | 佛山科学技术学院 | Two-dimensional ultrasonic vibration auxiliary melting welding device and method |
| CN108817621A (en) * | 2018-08-02 | 2018-11-16 | 威海万丰镁业科技发展有限公司 | Low frequency sound field controlling type longitudinal movement electric arc Tig Welding device and method |
| CN114054765A (en) * | 2021-11-12 | 2022-02-18 | 广州赛隆增材制造有限责任公司 | Powder making device and powder making method |
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| EP1369000B1 (en) * | 2001-03-09 | 2012-04-18 | Hypertherm, Inc. | Method of manufacturing a composite electrode for a plasma arc torch |
| CN100577340C (en) * | 2007-11-23 | 2010-01-06 | 哈尔滨工业大学 | Composite welding method of ultrasound wave and non-melt pole electrical arc |
| CN103264216B (en) * | 2013-05-15 | 2016-05-04 | 山东大学 | Based on controlled plasma arc welding system and the technique of back side aperture vision-based detection |
| CN103586571B (en) * | 2013-11-25 | 2016-08-17 | 国家电网公司 | Improve the device and method of aluminium alloy PLASMA ARC WELDING joint quality |
| CN104588893A (en) * | 2014-12-15 | 2015-05-06 | 赵辉 | Plasma arc ultrasonic welding process and device |
| CN205085533U (en) * | 2015-11-18 | 2016-03-16 | 山东大学 | Fenestrate plasma arc weld device is assisted to supersound |
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