CN104191075A - Welding gun of high-energy tungsten electrode inert gas welding and process thereof - Google Patents
Welding gun of high-energy tungsten electrode inert gas welding and process thereof Download PDFInfo
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- CN104191075A CN104191075A CN201410200492.9A CN201410200492A CN104191075A CN 104191075 A CN104191075 A CN 104191075A CN 201410200492 A CN201410200492 A CN 201410200492A CN 104191075 A CN104191075 A CN 104191075A
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- tungsten electrode
- water
- welding gun
- welding
- tungsten
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K9/00—Arc welding or cutting
- B23K9/24—Features related to electrodes
- B23K9/28—Supporting devices for electrodes
- B23K9/285—Cooled electrode holders
-
- 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
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Plasma & Fusion (AREA)
- Arc Welding In General (AREA)
Abstract
The invention discloses a welding gun of high-energy tungsten electrode inert gas welding. The welding gun comprises an outer insulation pipe, a tungsten electrode base in threaded connection with one end of the outer insulation pipe, and a ceramic nozzle in threaded connection with the tungsten electrode base, wherein a tungsten electrode is arranged in the ceramic nozzle, and is mounted on the tungsten electrode base; the other end of the outer insulation pipe is connected with a joint end; the welding gun further comprises a water cooling system; the water cooling system comprises a water way; one end of the water way is a water inlet end of the joint end, and the other end of the water way is a water outlet end of the joint end; and a sealing valve for controlling a water flow of cooling water is arranged between the water way and the tungsten electrode. According to the invention, the indirect cooling of the tungsten electrode in a traditional welding gun is changed to direct water cooling of the tungsten electrode, and the current density on the section of the tungsten electrode is increased through the change of cooling modes, so that the strong and concentrated electric arc force field and temperature field can be obtained through the self-magnetic shrinkage effect generated by electric arc, and the melting capacity of the electric arc is largely improved finally.
Description
Technical field
The invention belongs to welding technology field, relate to a kind of gas tungsten arc welding welding gun of high-energy-density electric arc and new technology of being implemented welding by this welding gun that the improvement of the welding electrode type of cooling is produced.
Background technology
Gas tungsten arc welding is under inert gas shielding; a kind of welding method of utilizing the arc heat between tungsten electrode and workpiece to melt mother metal and filler wire; protective gas ejection continuously from the nozzle of welding gun during welding; at electric arc, form gas shield layer to completely cut off air around; prevent the adverse effect to tungsten electrode, molten bath and the proximity thermal zone of influence, thereby obtain quality weld.
Application number is to disclose a kind of water cooled welding torch in No. 201010575078.8 applications for a patent for invention, this welding gun comprises the body of a gun, is connected to the rifle head of body of a gun leading section, the body of a gun comprises outer tube and the inner tube being fixedly connected with within the outer tube, on outer tube, be provided with cooling liquid inlet and cooling liquid outlet, between outer tube and inner tube, form water cooling annular seal space; Rifle head comprise be fixed on body of a gun front end ceramic sheath, be arranged on ventilation chuck in ceramic sheath and for the fixing tungsten electrode chuck of tungsten electrode; dismountable tungsten electrode fixed bar that is connected with in inner tube; tungsten electrode chuck is fixedly connected on the leading section of tungsten electrode fixed bar; in inner tube, there is gas atmosphere inlet, the inner chamber in inner tube and the ventilation inner chamber of chuck and the intracavity inter-connection of ceramic sheath.Its technical scheme adopts the mode of outer tube and inner tube socket welding can guarantee the sealing completely of water cooling annular seal space, can not cause the leakage of water, visible in conjunction with Figure of description, what coolant seal chamber was cooling is tungsten electrode chuck, by the cooling needs that meet tungsten electrode cooling to tungsten electrode chuck.
Application number is to disclose a kind of water-circulating cooling device of welding gun tungsten electrode in the application for a patent for invention of 200710024121.X, this device is formed by mandrel, this mandrel front end is fixed on rifle head tube body inside back by insulation bushing pipe, around centre is worn and is fixed in this rifle head after insulating sleeve, this core back-end is fixed in the body of a gun, welding gun tungsten electrode is clamping in this core tube by tungsten electrode, core tube's pars intramuralis radially both sides along axially forming respectively the curved seal shaft of end face to intake tunnel and seal shaft to backwater channel, the forward end seal of this axial intake tunnel and axially backwater channel is communicated with, the beam rear end of this axial intake tunnel and axially backwater channel is communicated with the intake tunnel and the backwater channel that axially arrange on this body of a gun respectively, realize this axle core circulating water.Wherein, tungsten electrode is through mandrel center, and press from both sides and mandrel is fixed by tungsten electrode, and first the heat of tungsten electrode passes to mandrel, then via circulating water cooling system, takes away, thereby reduced the temperature of tungsten electrode.
Visible by above-mentioned two applications for a patent for invention, prior art is by circulating water tungsten electrode folder (tungsten electrode chuck), thereby realizes the indirect water-cooling cooling of tungsten electrode.In use, find 1) the welding gun electric arc of this kind of type of cooling is free discharge fired state, and energy density is low, and after welding, fusion penetration is only 0.2 left and right with molten wide ratio, and it is the thickest in 3mm that single track can weld thickness; 2) welding current is no more than 400 amperes, and the thick size of centering (>=4mm) workpiece engineering adaptability is poor, can only adopt multi-pass welding to fetch solution in construction.
Summary of the invention
The object of the invention is to overcome electric arc in prior art and become the low shortcoming of energy density under free combustion state, provide a kind of heavy in section electrode is carried out to Forced water cooling, thereby make it produce the strong and concentrated electric arc field of force and the gas tungstun arc welding welding gun in temperature field, the technical scheme adopting is: a kind of high-energy gas tungsten arc welding welding gun, comprise external insulation pipe, the tungsten electrode seat being connected with external insulation pipe threaded one end and the ceramic nozzle being threaded with tungsten electrode seat, in ceramic nozzle, be provided with tungsten electrode, described tungsten electrode is arranged on tungsten electrode seat, the other end jointing end of external insulation pipe, it is characterized in that: described welding gun also has cooling water system, described cooling water system comprises water channel, water channel one end is the water inlet end of tip side, the water channel other end is the water side of tip side, between water channel and tungsten electrode, be provided with the seal valve that prevents that cooling water from revealing.
Technical characterictic of the present invention has: on described tungsten electrode, be processed with external screw thread, corresponding, in the centre bore of tungsten electrode seat, be processed with internal thread.
Technical characterictic of the present invention also has: the centre bore of described tungsten electrode seat forms a part for described water channel, and described seal valve is arranged in described centre bore.
Technical characterictic of the present invention also has: described welding gun also has gas handling system, and the air inlet pipe of described gas handling system is enclosed within the outside of water channel, and described gas handling system also comprises the inlet end being communicated with air inlet pipe, and described inlet end is located on tip side.
Technical characterictic of the present invention also has: described seal valve is ball valve.The design of this sealing means has guaranteed the sealing of cooling water in tungsten electrode replacing.
Technical characterictic of the present invention also has: the diameter range of described tungsten electrode is 10mm-16mm.
Technical characterictic of the present invention also has: one end wedge angle that described tungsten electrode is not connected with tungsten electrode seat is between 30 ° to 40 °, and this angular range can be applicable to the arc stability of engineering application and the long service life of electrode.
Technical characterictic of the present invention also has: a kind of right to use requires the welding procedure of welding gun described in 1, the steps include:
1) preparation before welding gun use, first tungsten electrode 8 being imported to external insulation pipe 6 by screw thread tightens, between tungsten electrode 8 thread roots and tungsten electrode seat 2, adopt curve slope engagement, realize the sealing of cooling water, secondly before welding starts, must check that whether cooling water system work is normal: water enters water channel from water inlet end 11, by water side 12, flows out, and this recirculated water is directly forced cooling to tungsten electrode;
2) when welding finishes or interruption temporarily; continue to keep welding gun water-cooled, be conducive to improve the service life of welding gun, protective gas enters air inlet pipe from inlet end 10; through the through hole on external insulation pipe 6 and protective gas laminar flow sieve, form conforming layer gas body and reach protection effect by ceramic nozzle 1.
Beneficial effect of the present invention is:
1) effect of structure generation of the present invention is: within the electron emission region that produces electric arc is limited in to the 2-3mm yardstick of tungsten electrode end, thereby obtain the hot physical effect of two kinds of arc discharges: the one, the current density that confined electric arc conductive section flows through increases, and the electron density of electric arc and energy density are improved; The 2nd, due to the raising formation " electromagnetism self-contraction effect " of current density in electric arc, its convergent force, along with the increase of electric current is quadratic relationship rising, makes the diameter of electric arc obtain " secondary contraction ".Above-mentioned two " physical effects " are to realize high-energy electric arc of the present invention aspect two of force characteristic and thermal characteristics, to be all significantly higher than the mechanism of traditional TIG electric arc.
To the direct water-cooling of heavy in section tungsten electrode, be to realize the necessary condition of the electron emission region of restriction electrode; Larger welding current parameter (the recommendation current range of welding gun of the present invention and the supporting source of welding current is 300A-1000A) is the adequate condition that obtains electromagnetism self-constriction.
2) technological effect that the present invention produces is: in " moulding of single welding two sides ", can complete following welding: austenite stainless steel plate material 2-15mm; High-strength steel sheet material 2-8mm; Aluminum alloy plate materials 2-12mm.During practical operation, according to the thickness of workpiece, speed of welding is controlled at 300-3000mm/min.
Accompanying drawing explanation
Accompanying drawing 1 is structural representation of the present invention, accompanying drawing 2 is 1 to be wherein that thickness is that the high strength alumin ium alloy of 10mm adds and fills a silk single-sided welding joint cross section, fusion penetration/molten wide ratio=1:1.8, accompanying drawing 3 is that thickness is that the 316L stainless steel of 12mm does not add and fills a silk butt welding one-shot forming joint cross section, fusion penetration/molten wide ratio=1:1.2, accompanying drawing 4 is that thickness is that the high-strength steel of 8mm does not add and fills a silk butt welding one-shot forming joint cross section, fusion penetration/molten wide ratio=1:1.5.Wherein 1 is ceramic nozzle, the 2nd, and tungsten electrode seat, the 3rd, water inlet pipe, the 4th, return pipe, the 5th, air inlet pipe, the 6th, external insulation pipe, the 7th, tip side, the 8th, tungsten electrode, the 9th, ball valve, the 10th, inlet end, the 11st, water inlet end, the 12nd, water side, the 13rd, water-cooled cable.
The specific embodiment
Below in conjunction with accompanying drawing, the specific embodiment of the present invention is described.The invention discloses a kind of high-energy gas tungsten arc welding welding gun; this welding gun comprises external insulation pipe 6, the tungsten electrode seat 2 being connected with external insulation pipe 6 threaded one ends and the ceramic nozzle 1 being threaded with tungsten electrode seat 2; in ceramic nozzle 1, be provided with tungsten electrode 8; tungsten electrode 8 is arranged on tungsten electrode seat 2, the other end jointing end 7 of external insulation pipe 6.In the present embodiment, on tungsten electrode 8, be processed with external screw thread, corresponding, in the centre bore of tungsten electrode seat, be processed with internal thread.
Welding gun also has cooling water system, and cooling water system comprises water channel, and water channel one end is the water inlet end 11 of tip side 7, and the water side 12 that the water channel other end is tip side is provided with the seal valve of controlling cooling water current between water channel and tungsten electrode 8.The centre bore of tungsten electrode seat 2 forms a part for water channel, and seal valve is arranged in centre bore.In the present embodiment, seal valve is ball valve.
Welding gun also has gas handling system, and the air inlet pipe 5 of gas handling system is enclosed within the outside of water channel, and gas handling system also comprises the inlet end 10 being communicated with air inlet pipe 5, and inlet end 10 is located on tip side.
The diameter of tungsten electrode 8 is 10mm, when tungsten electrode 8 is selected into tungsten electrode seat 2 by screw thread, backs down ball valve 9, make cooling water directly contact cooling with tungsten electrode 8, when needs, change after tungsten electrode 8, tungsten electrode 8 quilt back-outs, ball valve 9 relies on the disk spring self-closed water channel of self, thereby has avoided the leakage of cooling water.One end wedge angle that tungsten electrode is not connected with tungsten electrode seat is between 30 ° to 40 °, to adapt to different operating modes.
Ceramic nozzle 1 is made by silicon nitride or carbofrax material, has under the high arc temperature environment of 1000A the long-term feature of using, and ceramic nozzle 1 is connected with external insulation pipe 6 and has certain air-tightness, can guarantee that peripheral air can not invade.
Use this welding gun, can realize the one side two sides one-shot forming of larger depth-to-width ratio, welding process is summarized as follows:
Preparation before welding gun uses, first tungsten electrode 8 being imported to external insulation pipe 6 by screw thread tightens, between tungsten electrode 8 thread roots and tungsten electrode seat 2, adopt curve slope engagement, realize the sealing of cooling water, secondly before welding starts, must check that whether cooling water system work is normal: water enters water channel from water inlet end 11, by water side 12, flows out, and this recirculated water is directly forced cooling to tungsten electrode.
When welding finishes or interrupts temporarily, continue to keep welding gun water-cooled, be conducive to improve the service life of welding gun.Protective gas enters air inlet pipe from inlet end 10, through the through hole on external insulation pipe 6 and protective gas laminar flow sieve, forms conforming layer gas body and reaches protection effect by ceramic nozzle 1.
Process characteristic of the present invention is: when the once-forming of single welding two sides the depth-to-width ratio of weld seam be traditional handicraft 3-5 doubly, to the welding effect example of different materials as shown in Fig. 2-Fig. 4.Applicable thickness range: austenite stainless steel plate material 2-15mm; High-strength steel sheet material 2-8mm; Aluminum alloy plate materials 2-12mm.During practical operation, according to the thickness of workpiece, speed of welding is controlled at 300-3000mm/min.
Claims (8)
1. a high-energy gas tungsten arc welding welding gun; comprise external insulation pipe, the tungsten electrode seat being connected with external insulation pipe threaded one end and the ceramic nozzle being threaded with tungsten electrode seat; in ceramic nozzle, be provided with tungsten electrode; described tungsten electrode is arranged on tungsten electrode seat; the other end jointing end of external insulation pipe; it is characterized in that: described welding gun also has cooling water system; described cooling water system comprises water channel; water channel one end is the water inlet end of tip side; the water channel other end is the water side of tip side, is provided with the seal valve that prevents that cooling water from revealing between water channel and tungsten electrode.
2. according to high-energy gas tungsten arc welding welding gun claimed in claim 1, it is characterized in that: on described tungsten electrode, be processed with external screw thread, corresponding, in the centre bore of tungsten electrode seat, be processed with internal thread.
3. according to high-energy gas tungsten arc welding welding gun claimed in claim 2, it is characterized in that: the centre bore of described tungsten electrode seat forms a part for described water channel, and described seal valve is arranged in described centre bore.
4. according to high-energy gas tungsten arc welding welding gun claimed in claim 2; it is characterized in that: described welding gun also has gas handling system; the air inlet pipe of described gas handling system is enclosed within the outside of water channel; described gas handling system also comprises the inlet end being communicated with air inlet pipe, and described inlet end is located on tip side.
5. according to high-energy gas tungsten arc welding welding gun claimed in claim 2, it is characterized in that: described seal valve is to take the ball valve that ripple type spring is thrust.
6. according to high-energy gas tungsten arc welding welding gun claimed in claim 2, it is characterized in that: the diameter range of described tungsten electrode is 10mm-16mm.
7. according to high-energy gas tungsten arc welding welding gun claimed in claim 2, it is characterized in that: one end wedge angle that described tungsten electrode is not connected with tungsten electrode seat is between 30 ° to 40 °.
8. right to use requires a welding procedure for welding gun described in 1, the steps include:
1) preparation before welding gun use, first tungsten electrode 8 being imported to external insulation pipe 6 by screw thread tightens, between tungsten electrode 8 thread roots and tungsten electrode seat 2, adopt curve slope engagement, realize the sealing of cooling water, secondly before welding starts, must check that whether cooling water system work is normal: water enters water channel from water inlet end 11, by water side 12, flows out, and this recirculated water is directly forced cooling to tungsten electrode;
2) when welding finishes or interruption temporarily; continue to keep welding gun water-cooled, be conducive to improve the service life of welding gun, protective gas enters air inlet pipe from inlet end 10; through the through hole on external insulation pipe 6 and protective gas laminar flow sieve, form conforming layer gas body and reach protection effect by ceramic nozzle 1.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201410200492.9A CN104191075A (en) | 2014-05-13 | 2014-05-13 | Welding gun of high-energy tungsten electrode inert gas welding and process thereof |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201410200492.9A CN104191075A (en) | 2014-05-13 | 2014-05-13 | Welding gun of high-energy tungsten electrode inert gas welding and process thereof |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105108289A (en) * | 2015-09-18 | 2015-12-02 | 云南工程建设总承包公司 | Gas metal arc welding gun with hollow tungsten electrode |
| CN105983774A (en) * | 2016-06-24 | 2016-10-05 | 天津大学 | Water-cooling TIG welding gun with copper-coated tungsten electrode on basis of cathode compression effect |
| CN106077920A (en) * | 2016-06-24 | 2016-11-09 | 天津大学 | A kind of tungsten electrode internal water cooling TIG welding gun based on negative electrode pinch effect |
| 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 |
| CN106825869A (en) * | 2017-04-14 | 2017-06-13 | 石雪蛟 | Argon-arc welding gun and the device with the argon-arc welding gun |
| CN106975827A (en) * | 2017-04-27 | 2017-07-25 | 上海电力股份有限公司吴泾热电厂 | Super long type high temperature TIG robotic guns |
| CN109434256A (en) * | 2018-12-28 | 2019-03-08 | 成都国泰景程科技有限公司 | A kind of gas tungsten arc welding welding gun of compressible electric arc |
| CN115106628A (en) * | 2022-08-11 | 2022-09-27 | 上海工程技术大学 | Argon tungsten-arc welding gun suitable for aluminum alloy welding |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106825869A (en) * | 2017-04-14 | 2017-06-13 | 石雪蛟 | Argon-arc welding gun and the device with the argon-arc welding gun |
| CN106975827A (en) * | 2017-04-27 | 2017-07-25 | 上海电力股份有限公司吴泾热电厂 | Super long type high temperature TIG robotic guns |
| CN109434256A (en) * | 2018-12-28 | 2019-03-08 | 成都国泰景程科技有限公司 | A kind of gas tungsten arc welding welding gun of compressible electric arc |
| CN115106628A (en) * | 2022-08-11 | 2022-09-27 | 上海工程技术大学 | Argon tungsten-arc welding gun suitable for aluminum alloy welding |
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