CN106077920A - A kind of tungsten electrode internal water cooling TIG welding gun based on negative electrode pinch effect - Google Patents
A kind of tungsten electrode internal water cooling TIG welding gun based on negative electrode pinch effect Download PDFInfo
- Publication number
- CN106077920A CN106077920A CN201610487771.7A CN201610487771A CN106077920A CN 106077920 A CN106077920 A CN 106077920A CN 201610487771 A CN201610487771 A CN 201610487771A CN 106077920 A CN106077920 A CN 106077920A
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- tungsten electrode
- newel
- hood
- water
- tail
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Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K9/00—Arc welding or cutting
- B23K9/24—Features related to electrodes
- B23K9/26—Accessories for electrodes, e.g. ignition tips
-
- 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
- B23K35/00—Rods, electrodes, materials, or media, for use in soldering, welding, or cutting
- B23K35/02—Rods, electrodes, materials, or media, for use in soldering, welding, or cutting characterised by mechanical features, e.g. shape
- B23K35/0205—Non-consumable electrodes; C-electrodes
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K9/00—Arc welding or cutting
- B23K9/16—Arc welding or cutting making use of shielding gas
- B23K9/167—Arc welding or cutting making use of shielding gas and of a non-consumable electrode
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K9/00—Arc welding or cutting
- B23K9/32—Accessories
- B23K9/323—Combined coupling means, e.g. gas, electricity, water or the like
Abstract
The present invention relates to tungsten electrode argon arc welding gun, disclose a kind of tungsten electrode internal water cooling TIG welding gun based on negative electrode pinch effect, tail-hood, the newel of bottom connection tungsten electrode base is connected including top, tungsten electrode base bottom is connected with the tungsten electrode head with holes of pore chamber in tungsten electrode head, it is provided with sleeve outside newel, between sleeve and newel, forms gap air flue；Lower cartridge connects protected gas gas hood；Tail-hood is equipped with outlet pipe, water inlet pipe and air inlet pipe, is internally provided with backwater hole, inlet opening, passage in gun body accordingly and is communicated in the gas stilling chamber of gap air flue；Connecting bottom newel has aqueduct, aqueduct to be provided with the water spout communicated with inlet opening；Cooling-water duct is isolated by upper-lower seal circle with protection gas passage.Coolant is passed directly into inside tungsten electrode by the present invention, strongly cools down tungsten electrode, it is possible to compression cathode chamber area, it is achieved the compression higher to arc column, increases the penetration capacity of electric arc, makes welding arc have more preferable penetrance.
Description
Technical field
The present invention relates to a kind of tungsten electrode argon arc welding gun, specifically, relate to a kind of based on the improvement of negative electrode pinch effect
Arc performance, carries out the TIG welding gun of direct water-cooling, can improve welding efficiency tungsten electrode head.
Background technology
Argon tungsten-arc welding (TIG) is a kind of high quality welds technique, the most extensively applies, but owing to utilizing
Free electric arc is as thermal source, and fusion penetration is shallower, and weldering speed is little, and welding efficiency is the lowest.In the urgent need to TIG weldering is improved optimization, arrest
Bundle arc diameter, it is possible to increase arc energy density and arc pressure, thus significantly increase fusion penetration, welding is finally greatly improved
Efficiency.
In plasma arc welding (PAW), directly cool down electric arc arc column by water-cooled copper nozzle, be the effective of a kind of compression arc diameter
Measure.But, the manufacturing expense of plasma (welding) torch is higher；Copper nozzle current capacity is limited, easily forms double arc；And it is straight
Connecing compression arc column causes blow force of arc excessive, and throat thickness is more than the aperture less stable in 6mm workpiece fabrication.In TIG weldering,
Tungsten electrode is hot cathode, and its density launching electronics has direct relation with negative electrode local temperature, and temperature is the highest, launches electronic capability more
By force；Tungsten electrode tip is launched electronics and is occurred mainly in the region of more than 3000K.Compression negative electrode is another way reducing arc column diameter
Footpath, its principle is: water-cooled tungsten electrode can take away tungsten electrode heat, compresses high-temperature area area, thus compression of electronic emitting area, also
It is exactly to compress cathode zone area so that electric arc root concentrates on the very small region that tungsten electrode is most advanced and sophisticated；Electric current density increases, and electric arc is certainly
The magnetic compression effect of body strengthens, and with arc of folding column dimension, thus can improve the heat-force characteristic of electric arc.In brief, tungsten electrode is entered
Row cooling, takes away tungsten electrode heat, reduces cathode zone area, arc cathode district is compressed to tungsten electrode point electrode zonule, permissible
Reduce arc column diameter.Water-cooled cathode contraction principle is as shown in Figure 1.
Water-cooled has been compressed negative electrode theory and has been applied to improve welding gun by foreign study person, improves arc characteristic.1997, Australia
CSIR of big Leah research institution O compresses cathode effect based on water-cooled, coordinates bigger welding current, has invented K-TIG welding method,
Achieve the piercing welding to low thermal conductivity materials such as 3～12mm thickness titanium alloys, rustless steels.Owing to this technique welding penetration is big,
Cut deal part can be realized perforation weldering or realize high speed melting welding, be greatly enhanced production efficiency.Perforation to cut deal part
Weldering, it is not necessary to bevel, single pass single-sided welding, two-sides forming；Eliminate welding wire, greatly shorten manufacturing time；Reduce weldering
Seam heat affected area and workpiece deflection.Subsequently, Germany Dresden University Of Technology, Yi Da high-tech welding limit company and
Kjellberg Finsterwalde combines and has carried out the design of welding gun of based on negative electrode pinch effect, preliminary study negative electrode compression
Arc shape is affected by effect；K-TIG welding procedure is expanded to high heat conductance material from welding the perforation of low thermal conductivity material
The high speed melting welding of material.The domestic research to K-TIG is less, the Suzhou Hua Han Science and Technology Ltd. preliminary study equipment of K-TIG,
Butt welding gun has carried out imitated research.Lanzhou University of Science & Technology Zhang Ruihua is with K-TIG welding gun as object of study, according to magnetohydrodynamics
Theory establishes the mathematic model of three-dimensional finite element of electric arc, utilizes FLUENT software to K-TIG welding gun internal protection gas and weldering
Connect electric arc and carried out numerical simulation, it is thus achieved that Temperature Distribution, Potential Distributing, arc pressure and plasma speed during big electric current welding
Degree field distribution.The welding gun that above team develops is all based on water-cooled compression cathode effect and carrys out compression arc, drastically increases weldering
Connect efficiency, reduce production cost.Both welding gun current capacities reach 1000A, and in welding process, tungsten electrode scaling loss is the least；Water-cooled
Mode is all plus water cooling copper sleeve outside tungsten electrode, indirect water-cooling tungsten electrode rather than directly tungsten electrode itself is carried out water-cooled.The most just
It is to say, the water-cooled compression effectiveness on tungsten electrode cathode chamber is also improved room for promotion.
Summary of the invention
The present invention is in order to improve the water-cooled compression effectiveness on TIG welding gun tungsten electrode cathode chamber, it is provided that a kind of based on negative electrode compression effect
The tungsten electrode internal water cooling TIG welding gun answered, by tungsten electrode inside carries out direct water-cooling, strengthens the cooling effect to tungsten electrode, to reach
To the contained effect of increase electric arc, increase the penetration capacity of electric arc, thicker workpiece can be welded, improve piercing welding further
Stability；The material that thermal conductivity is higher can be carried out perforation weldering simultaneously, and then realize high efficiency and the high speed of TIG weldering.
In order to solve above-mentioned technical problem, the present invention is achieved by following technical scheme:
A kind of tungsten electrode internal water cooling TIG welding gun based on negative electrode pinch effect, connects including top and has tail-hood, bottom to connect
The newel of tungsten electrode base, described newel bottom is had to constitute backwater cavity with described tungsten electrode chassis interior；Described tungsten electrode base
Bottom connects has tungsten electrode head with holes, described tungsten electrode head with holes to be provided with pore chamber in tungsten electrode head, described tungsten electrode head with holes and described tungsten
The first sealing ring it is provided with between the base of pole；
It is provided with sleeve outside described newel, between described sleeve and described newel outer wall, forms gap air flue；Institute
Stating sleeve outer wall and be cased with insulation shell, described upper cartridge is connected with described tail-hood, and the connection of described lower cartridge is arranged at described
Protection gas gas hood outside tungsten electrode base and described tungsten electrode head with holes；
Described tail-hood top be equipped with the outlet pipe for connecting drain pipe, for be passed through coolant water inlet pipe and for
Connecting the air inlet pipe of protection trachea, described water inlet pipe is connected with water-cooled cable simultaneously；Described tail-hood and described newel are continuously
Being provided with the backwater hole of up/down perforation, inlet opening and passage, described backwater hole top is connected to described outlet pipe, bottom connection
To described backwater cavity, top, described inlet opening is connected to described water inlet pipe, bottom connects aqueduct, and described passage top is even
Lead to and be communicated in the gas stilling chamber being arranged at described newel in described air inlet pipe, bottom, described gas stilling chamber and described between
Gap air flue communicates；Connecting bottom described newel to have and extend to the aqueduct of pore chamber in described tungsten electrode head, described aqueduct is arranged
There is the water spout communicated with described inlet opening；
Be provided with the second sealing ring between described tail-hood and described newel, and described second sealing ring be positioned at inlet opening and
Between passage；The 3rd sealing ring it is provided with, described second sealing ring and described between described tungsten electrode base and described newel
3rd sealing ring is used for isolating cooling-water duct and protection gas passage.
Wherein, described water inlet pipe, described tail-hood, described newel and described tungsten electrode base are copper.
The invention has the beneficial effects as follows:
The tungsten electrode internal water cooling TIG welding gun of the present invention, is passed directly into coolant inside tungsten electrode, carries out tungsten electrode the strongest
Strong cooling, it is possible to greatly compression cathode chamber area, it is achieved the compression higher to arc column, thus increase the penetration capacity of electric arc,
Make welding arc have more preferable penetrance, improve the stability of welding process, increase speed of welding, significantly improve welding effect
Rate, saves welding manufacture cost.
Accompanying drawing explanation
Fig. 1 is the comparison diagram of tradition TIG (left) and negative electrode compression TIG (right)；
Fig. 2 is the structural representation of tungsten electrode internal water cooling TIG welding gun provided by the present invention.
In figure: 1: tungsten electrode head with holes；2: the first sealing rings；3: tungsten electrode base；4: aqueduct；5: newel；6: sleeve；7:
Insulation shell；8: tail-hood；9: the second sealing rings；10: outlet pipe；11: water inlet pipe；12: air inlet pipe；13: protection gas gas hood；14: tungsten
Pore chamber in cartridge；15: water spout；16: backwater hole；17: passage；18: gas stilling chamber；19: the three sealing rings；20: water inlet
Hole.
Detailed description of the invention
For present disclosure, feature and effect can be further appreciated that, hereby enumerate following example, and coordinate accompanying drawing detailed
It is described as follows:
As in figure 2 it is shown, present embodiments provide a kind of tungsten electrode internal water cooling TIG welding gun based on negative electrode pinch effect, bag
Include tungsten electrode head the 1, first sealing ring 2 with holes, tungsten electrode base 3, aqueduct 4, newel 5, sleeve 6, insulation shell 7, tail-hood 8, second
Pore chamber 14, water spout 15, backwater in sealing ring 9, outlet pipe 10, water inlet pipe 11, air inlet pipe 12, protection gas gas hood 13, tungsten electrode head
Hole 16, passage 17, gas stilling chamber the 18, the 3rd sealing ring 19, inlet opening 20.Wherein, water inlet pipe 11, tail-hood 8, newel 5
Being copper with tungsten electrode base 3, tungsten electrode head 1 with holes is tungsten prepared material.
Threadeding with tail-hood 8 in newel 5 top, threadeds with tungsten electrode base 3 in bottom, bottom newel 5 and tungsten electrode
Base 3 is internally formed a backwater cavity.Tungsten electrode head 1 with holes is threaded in the bottom of tungsten electrode base 3, and tungsten electrode head 1 with holes is arranged
Having pore chamber 14 in tungsten electrode head, in tungsten electrode head, pore chamber 14 communicates with backwater cavity, and in tungsten electrode, the existence of pore chamber 14 enables coolant
Wall internal with tungsten electrode head 1 with holes is fully contacted, thus takes away tungsten electrode heat, is subtracted by the high-temperature region area of tungsten electrode tip outer surface
Little, to reach strongly to cool down tungsten electrode, the purpose on compression cathode chamber.It is provided with first close between tungsten electrode head 1 with holes and tungsten electrode base 3
Seal 2, isolates cooling-water duct by the first sealing ring 2.
Newel 5 is outside is provided with sleeve 6, threadeds with tail-hood 8 in sleeve 6 top, sleeve 6 bottom and protection gas gas hood
13 is threaded, and tungsten electrode base 3 is located at by protection gas gas hood 13 and tungsten electrode head 1 with holes is outside.Between sleeve 6 and newel 5 outer wall
Form gap air flue.Sleeve 6 outer wall is cased with insulation shell 7, accommodates part with welding gun and constitutes electric isolution.
Tail-hood 8 top is equipped with outlet pipe 10, water inlet pipe 11 and air inlet pipe 12, and outlet pipe 10 is used for connecting drain pipe；Enter
Water pipe 11 is threadeded with water-cooled cable, and is used for being passed through coolant；Air inlet pipe 12 is used for connecting protection trachea.In tail-hood 8
Portion offers the backwater hole 16 of up/down perforation, inlet opening 20 respectively corresponding to outlet pipe 10, water inlet pipe 11 and air inlet pipe 12 and leads to
Pore 17.
Newel 5 is cylindrical structure, and its bottom centre position is threaded aqueduct 4, and aqueduct 4 is provided with up and down
Through water spout 15.Newel 5 is internal also offer up/down perforation backwater hole 16, inlet opening 20 and passage 17, its
Backwater hole 16 top is connected with the backwater hole 16 of tail-hood 8, bottom is communicated to backwater cavity, its top, inlet opening 20 and tail-hood 8
Inlet opening 20 be connected, bottom connects with the water spout 15 of aqueduct 4.It is gentle that newel 5 inside is further opened with passage 17
Body stilling chamber 18, this passage 17 top is connected with the passage 17 of tail-hood 8, bottom is communicated in gas stilling chamber 18, gas
Gap air flue between stilling chamber 18 with sleeve 6 and newel 5 outer wall connects.
It is provided with the second sealing ring 9 between tail-hood 8 and newel 5, and the second sealing ring 9 is positioned at inlet opening 20 and passage
Between 17, to isolate cooling-water duct and protection gas passage.The 3rd sealing ring 19 it is provided with between tungsten electrode base 3 and newel 5,
Cooling-water duct and protection gas passage is isolated by the 3rd sealing ring 19.
On welding gun, water inlet pipe 11 is threadeded with water-cooled cable, and welding current enters gun body along water inlet pipe 11, successively warp
Cross tail-hood, newel 5, tungsten electrode base 3, arrive tungsten electrode head 1 with holes, at tungsten electrode head 1 with holes most advanced and sophisticated formation electric arc.Coolant enters
After water inlet pipe 11, along the inlet opening 20 of tail-hood 8 with newel 5, imported pore chamber 14 in tungsten electrode head, cooling cooling by aqueduct 4
The parts that liquid stream is crossed, particularly reach tungsten electrode head 1 with holes to force cooling so that the high temperature area of tungsten electrode head 1 end with holes is received
Contracting, namely forces to shrink cathode chamber, constrained arc root, increases the electric current density of electric arc root, the magnetic compression of electric arc self
Effect strengthens, and arc column size is compressed, thus improved the heat-force characteristic of electric arc.Coolant in tungsten electrode head pore chamber 14 with holes
After tungsten electrode head 1 inwall is fully contacted, enters tungsten electrode base 3 inner space along tungsten electrode head 1 inwall passage with holes, pass through newel
5 and the backwater hole 16 of tail-hood 8, then through outlet pipe 10, finally enter the drain pipe being connected with outlet pipe 10, flow back to cool down water
Case.Protection trachea is connected in air inlet pipe 12, and the passage 17 consisted of with newel 5 tail-hood 8 enters the gas on newel
Body stilling chamber 18, protection gas extends to the gap air flue that newel 5 is constituted with sleeve 6 in gas stilling chamber 18, enters protection
In gas gas hood 13, in protection gas gas hood 13 port ejection, flow along tungsten electrode head 1 outer wall with holes, protect tungsten electrode head 1 with holes and electricity
Arc and molten bath.
Use this welding gun, it is possible to regulate negative electrode compression degree by changing coolant speed, obtain different compression degree
Arc column, it is possible to better adapt to the welding of different materials.General, the coolant of bigger flow velocity can obtain more intensive electricity
Arc compression property, obtains more preferable fusion penetration and welding efficiency.
Although the preferred embodiments of the present invention being described above in conjunction with accompanying drawing, but the invention is not limited in
The detailed description of the invention stated, above-mentioned detailed description of the invention is only schematically, is not restrictive, this area common
Technical staff is under the enlightenment of the present invention, in the case of without departing from invention objective and scope of the claimed protection, it is also possible to
Make the concrete conversion of a lot of form, within these belong to protection scope of the present invention.
Claims (2)
1. a tungsten electrode internal water cooling TIG welding gun based on negative electrode pinch effect, it is characterised in that include that top connection has tail
Lid, bottom connect the newel having tungsten electrode base, and described newel bottom constitutes backwater cavity with described tungsten electrode chassis interior；Institute
Stating the connection of tungsten electrode base bottom has tungsten electrode head with holes, described tungsten electrode head with holes to be provided with pore chamber in tungsten electrode head, described tungsten electrode with holes
It is provided with the first sealing ring between head and described tungsten electrode base；
It is provided with sleeve outside described newel, between described sleeve and described newel outer wall, forms gap air flue；Described set
Drum outer wall is cased with insulation shell, and described upper cartridge is connected with described tail-hood, and the connection of described lower cartridge is arranged at described tungsten electrode
Protection gas gas hood outside base and described tungsten electrode head with holes；
Described tail-hood top is equipped with the outlet pipe for connecting drain pipe, for being passed through the water inlet pipe of coolant and for connecting
The air inlet pipe of protection trachea, described water inlet pipe is connected with water-cooled cable simultaneously；Described tail-hood and described newel are continuously provided
Having the backwater hole of up/down perforation, inlet opening and passage, described backwater hole top is connected to described outlet pipe, bottom is communicated to institute
Stating backwater cavity, top, described inlet opening is connected to described water inlet pipe, bottom connects aqueduct, and described passage top is communicated in
Described air inlet pipe, bottom are communicated in the gas stilling chamber being arranged at described newel, described gas stilling chamber and described gap gas
Road communicates；Connect bottom described newel to have and extend to the aqueduct of pore chamber in described tungsten electrode head, described aqueduct be provided with
The water spout that described inlet opening communicates；
It is provided with the second sealing ring between described tail-hood and described newel, and described second sealing ring is positioned at inlet opening and ventilation
Between hole；The 3rd sealing ring, described second sealing ring and the described 3rd it is provided with between described tungsten electrode base and described newel
Sealing ring is used for isolating cooling-water duct and protection gas passage.
A kind of tungsten electrode internal water cooling TIG welding gun based on negative electrode pinch effect the most according to claim 1, its feature exists
In, described water inlet pipe, described tail-hood, described newel and described tungsten electrode base are copper.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610487771.7A CN106077920B (en) | 2016-06-24 | 2016-06-24 | A kind of tungsten electrode internal water cooling TIG welding guns based on cathode pinch effect |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610487771.7A CN106077920B (en) | 2016-06-24 | 2016-06-24 | A kind of tungsten electrode internal water cooling TIG welding guns based on cathode pinch effect |
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| Publication Number | Publication Date |
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| CN106077920A true CN106077920A (en) | 2016-11-09 |
| CN106077920B CN106077920B (en) | 2018-11-06 |
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| CN201610487771.7A Expired - Fee Related CN106077920B (en) | 2016-06-24 | 2016-06-24 | A kind of tungsten electrode internal water cooling TIG welding guns based on cathode pinch effect |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106735786A (en) * | 2017-01-23 | 2017-05-31 | 广东福维德焊接股份有限公司 | A kind of integrated lock effect of holes TIG deep penetration welding welding guns |
| CN108838492A (en) * | 2018-06-27 | 2018-11-20 | 天津大学 | A kind of GTAW welding gun of dry ice cold tungsten electrode by force |
| CN113695718A (en) * | 2021-08-31 | 2021-11-26 | 华南理工大学 | Rotary TIG (tungsten inert gas) welding gun for welding and repairing inner wall of pipe with extremely small diameter |
| WO2022035821A3 (en) * | 2020-08-12 | 2022-04-21 | The Esab Group Inc. | Arc welding, cladding, and additive manufacturing method and apparatus |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106735786A (en) * | 2017-01-23 | 2017-05-31 | 广东福维德焊接股份有限公司 | A kind of integrated lock effect of holes TIG deep penetration welding welding guns |
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| CN108838492B (en) * | 2018-06-27 | 2020-08-28 | 天津大学 | GTAW welding gun of dry ice strong-cooling tungsten electrode |
| WO2022035821A3 (en) * | 2020-08-12 | 2022-04-21 | The Esab Group Inc. | Arc welding, cladding, and additive manufacturing method and apparatus |
| CN113695718A (en) * | 2021-08-31 | 2021-11-26 | 华南理工大学 | Rotary TIG (tungsten inert gas) welding gun for welding and repairing inner wall of pipe with extremely small diameter |
| CN113695718B (en) * | 2021-08-31 | 2022-07-26 | 华南理工大学 | Be used for welding of minimum diameter pipe inner wall and prosthetic rotatory TIG welder |
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| Publication number | Publication date |
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| CN106077920B (en) | 2018-11-06 |
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