CN106825870A - Flux-cored wire welding with filler wire method and its device - Google Patents
Flux-cored wire welding with filler wire method and its device Download PDFInfo
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- CN106825870A CN106825870A CN201510891509.4A CN201510891509A CN106825870A CN 106825870 A CN106825870 A CN 106825870A CN 201510891509 A CN201510891509 A CN 201510891509A CN 106825870 A CN106825870 A CN 106825870A
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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
- B23K9/16—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
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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
- B23K9/12—Automatic feeding or moving of electrodes or work for spot or seam welding or cutting
- B23K9/133—Means for feeding electrodes, e.g. drums, rolls, motors
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- Mechanical Engineering (AREA)
- Arc Welding In General (AREA)
Abstract
The present invention disclose flux-cored wire welding with filler wire method and its device, and the wire feeder of flux-cored wire is set on TIG welding guns, so that welding wire front in tungsten electrode in welding direction, and ensure flux-cored wire feeding bath rather than into electric arc.Welding wire sends into bath, rather than in electric arc, it is to avoid flux-cored wire composition evaporates in electric arc, pollutes tungsten electrode；Rationally using the metallurgical reaction of all kinds of flux-cored wires, improve the operational characteristic and welding quality of TIG welderings.
Description
Technical field
The invention belongs to welding equipment and technology field, a kind of flux-cored wire silk filling TIG soldering methods and its device are related generally to.
Background technology
TIG weld has welding arc stablility, and welding quality is high, and welding parameter is easily controllable, it is easy to accomplish the advantages of automation.Current TIG weld technique is broadly divided into two classes that do not fill silk and fill silk according to silk filling mode, wherein the TIG weld technique that fills silk is to fill out solid core welding wire.It is very sensitive to water, iron rust in welding process due to the characteristic of TIG weld non-melt pole inert gas shielding, easily cause the weld defects such as weld seam folder hydrogen, stomata.Therefore no matter fill silk or do not fill silk TIG weld, its welding procedure before the weldering rust cleaning, drying etc. suffer from requirement very high in measure.But under some rigor conditions, when such as local dry cavity is welded under water, underwater environment is moist, and weldment easily gets rusty, cannot accomplish effectively to remove harm of the moisture so as to eliminate hydrogen and stomata in such a case before weldering.The wire feed direction of traditional silk filling TIG welderings is in a very small angle between welding wire and workpiece, it is almost parallel, namely welding wire is approximately perpendicular to the tungsten electrode in welding gun, the volume of the welding gun that this technique is used is big and position of welding wire feeding is difficult to be accurately positioned, and this method is only applicable to automatic soldering technique, be not suitable for manual operations, in narrow space when being not particularly suitable for being welded using local dry cavity under water.French Air Liquide Welding Group devise a welding gun, and welding wire is sent into 20 ° of directions at angle from tungsten electrode, and such wire feed direction greatly reduces the volume of welding gun.But this welding gun is, by the electric arc below solid core welding wire feeding tungsten electrode, rather than in molten bath, to be not suitable for flux-cored wire.If flux-cored wire is sent directly into electric arc using this welding gun, some of medicinal powder is heated evaporation into branch, is wrapped on tungsten electrode, and tungsten electrode is polluted, and flux-cored wire melts in electric arc can cause the problems such as splashing, and have a strong impact on the stability of welding procedure.
The content of the invention
It is an object of the invention to overcome the deficiencies in the prior art, the defect of the TIG soldering methods that filled silk for existing flux-cored wire, there is provided a kind of flux-cored wire welding with filler wire method and its device.
Technical purpose of the invention is achieved by following technical proposals：
Flux-cored wire welding with filler wire method, using tungsten electrode welding gun striking and welding pool is formed on workpiece, vertically into welding pool, flux-cored wire is located at the front of tungsten electrode to flux-cored wire in welding direction, and flux-cored wire end center is centrally located in same level plane with tungsten electrode end.
In above-mentioned welding method, welding current is 160-280A, and wire feed rate is 18-30mm/s, and a length of 3-5mm of electric arc, tungsten electrode extension elongation is 5-7mm；Speed of welding is 2-20mm/s, and medicine core end of welding portion center and the distance (horizontal range) at tungsten electrode end center are 3-20mm in welding direction.
In above-mentioned welding method, welding current is 200-250A, and wire feed rate is 20-25mm/s, and a length of 3-5mm of electric arc, tungsten electrode extension elongation is 5-7mm；Speed of welding is 5-15mm/s, and medicine core end of welding portion center and the distance (horizontal range) at tungsten electrode end center are 10-20mm in welding direction.
In the implementation of technical solution of the present invention, the flux-cored wire filler wire welding equipment for using, including TIG welding guns and wire feed annex, on TIG welding guns, wire feed annex includes filament mouth, enters silk mouthful and adapter sleeve wire feed annex, wherein：
Enter silk mouthful, for being connected with wire-feeding pipe and wire-feed motor, so that flux-cored wire carries out wire feed into wire feed annex and according to the direction of wire feed annex；
Filament mouth, for being input into flux-cored wire in welding pool；
Adapter sleeve, for being connected with TIG welding guns and being fixed, so that wire feed annex is arranged on forms one on TIG welding guns, the attitude of wire feed annex is adjusted simultaneously, so that flux-cored wire from filament mouth out after vertically into in welding pool, flux-cored wire is located at the front of tungsten electrode in welding direction, and flux-cored wire end center is centrally located in same level plane (i.e. along the same plane in welding direction) with tungsten electrode end；
The adapter sleeve can use clip, by rotation and the mobile adjustment to realize wire feed annex attitude.
The TIG welding guns are manual TIG welding gun or automatic TIG welding rifle.
Wire feed annex is fixed on the outside of the ceramic nozzle of TIG welding guns by adapter sleeve for selection, and is adjusted.
In above-mentioned welding scheme, speed of welding is the relative velocity of workpiece and welding gun, will workpiece fixed, the translational speed of welding gun, because wire feed annex is fixed on welding gun, the tungsten electrode and flux-cored wire of welding gun keep essentially identical speed, geo-stationary between the two, and keep horizontal range constant.
Naming method of the present invention with reference to flux cored wire arc welding (FCAW), the method of the present invention is named as FC-TIG soldering methods, using the suitable metallurgical reaction in molten bath of flux-cored wire, suppress water, the harm of the unfavorable factors such as iron rust, improve the rust-proofing ability of TIG weld technique, and sent into molten bath flux-cored wire by designing supporting wire feeder, ensure the metallurgical reaction in flux-cored wire participation molten bath, it is melted rather than in electric arc, rationally improve welding quality and manufacturability using metallurgical reaction, realize flux-cored wire fill silk TIG weld not only can carry out but also can operate by hand in the way of automatic welding in the way of carry out, the purpose that can be even operated in narrow space.
Compared with prior art, flux-cored wire is almost vertically fed into (vertically into welding pool) in technical scheme, welding gun and wire feeder compact conformation, being both applicable to automatic welding gun can also be used in welding gun hand-manipulated, especially be operated in narrow space；Flux-cored wire feeding position is fixed, it is not necessary to extra adjustment wire feed angle；Welding gun annex is into series and can be suitable for the requirement of different welding guns, the size of ceramic nozzle, different tungsten electrodes and flux-cored wire distance with dismounting and change；Welding wire sends into bath, rather than in electric arc, it is to avoid flux-cored wire composition evaporates in electric arc, pollutes tungsten electrode, improves welding efficiency, using flux-cored wire transition alloy elements, metallurgical reaction occurs in molten bath, suppresses the harm that moisture and iron rust are caused；Rationally using the metallurgical reaction of all kinds of flux-cored wires, improve the operational characteristic and welding quality of TIG welderings.
Brief description of the drawings
Fig. 1 is the implementation method schematic diagram of flux-cored wire silk filling TIG weld (FC-TIG) of the invention, wherein 1 is tungsten electrode welding gun (TIG welding guns), 1-1 is ceramic nozzle, 1-2 is tungsten electrode, 2 is wire feed annex, 2-1 is filament mouth, 2-2 is that 2-3 is adapter sleeve, and 3 is flux-cored wire into silk mouthful, 4 is molten bath, 5 is electric arc, and 6 is welding direction, and 7 is tungsten electrode end center and distance (horizontal range) of the welding wire end center in welding direction, 8 is workpiece, and 9 is tungsten electrode end center and the same level plane where the center of welding wire end.
Fig. 2 is the structural representation of the wire feed annex used in the present invention, wherein 2 is wire feed annex, 2-1 is filament mouth, and 2-2 is that 2-3 is adapter sleeve into silk mouthful.
Fig. 3 is the schematic diagram of the flux-cored wire silk filling manual TIG weldering device obtained using technical solution of the present invention, wherein 2 is wire feed annex, 3 is flux-cored wire, 7 is tungsten electrode end center and distance (horizontal range) of the welding wire end center in welding direction, 9 is tungsten electrode end center and the same level plane where the center of welding wire end, and 10 is manual TIG welding gun, and 10-1 is the ceramic nozzle of manual TIG welding gun, 10-2 is the tungsten electrode of manual TIG welding gun, and 11 is wire-feeding pipe.
Fig. 4 is the flux-cored wire silk filling automatic TIG welding gun apparatus schematic diagram obtained using technical solution of the present invention, wherein 2 is wire feed annex, 2-2 is into silk mouthful, 3 is flux-cored wire, 7 is tungsten electrode end center and distance (horizontal range) of the welding wire end center in welding direction, and 9 is tungsten electrode end center and the same level plane where the center of welding wire end, and 12 is automatic TIG welding rifle, 12-1 is the ceramic nozzle of automatic TIG welding rifle, and 12-2 is the tungsten electrode of automatic TIG welding rifle.
Fig. 5 is the pattern photo of the face of weld for using flux-cored wire of the invention silk filling TIG weld (FC-TIG) new method to be welded on moist rust plate.
Fig. 6 is the pattern photo using the section of weld joint welded on moist rust plate using flux-cored wire of the invention silk filling TIG weld (FC-TIG) new method.
Fig. 7 is the pattern photo using the weld seam microstructure welded on moist rust plate using flux-cored wire of the invention silk filling TIG weld (FC-TIG) new method.
Fig. 8 is the pattern photo that flux-cored wire is sent into the face of weld in electric arc when TIG is welded.
Fig. 9 is the pattern photo that flux-cored wire is sent into the section of weld joint in electric arc when TIG is welded.
Specific embodiment
Technical scheme is further illustrated with reference to specific embodiment.
As shown in figure 1 and 2, it is arranged on TIG welding guns using wire feed annex, wire feed annex includes filament mouth, enters silk mouthful and adapter sleeve, wherein entering silk mouthful, for being connected with wire-feeding pipe and wire-feed motor, so that flux-cored wire carries out wire feed into wire feed annex and according to the direction of wire feed annex；Filament mouth, for being input into flux-cored wire in welding pool；Adapter sleeve, for being connected with TIG welding guns and being fixed, so that wire feed annex is arranged on forms one on TIG welding guns, the attitude of wire feed annex is adjusted simultaneously, so that flux-cored wire from filament mouth out after vertically into in welding pool, flux-cored wire is located at the front of tungsten electrode in welding direction, and flux-cored wire end center is centrally located in same level plane (i.e. along the same plane in welding direction) with tungsten electrode end, adapter sleeve can use clip, by rotation and the mobile adjustment to realize wire feed annex attitude.As shown in figures 3 and 4, wire feed annex is installed and coordinated with manual TIG welding gun, automatic TIG welding rifle respectively, be capable of achieving (1) flux-cored wire from filament mouth out after vertically into in welding pool；(2) flux-cored wire is located at the front of tungsten electrode in welding direction；(3) flux-cored wire end center is centrally located in same level plane with tungsten electrode end.
Local dry cavity welding surroundings under simulation water in the lab, using the type welding machines of Miller Dynasty 350,700,711Ni type flux-cored wires are filled, using FC-TIG methods of the present invention and above-mentioned wire feeder and automatic TIG welding rifle, the DH36 steel plates full of iron rust to thick 8mm carry out built-up welding experiment.
Selection technological parameter is as follows：
(1) welding current 160A, wire feed rate 30mm/s, electric arc 5mm long, tungsten electrode extension elongation is 5mm, and speed of welding is 2mm/s, and the distance of flux-cored wire and tungsten electrode is 3mm；
(2) welding current 280A, wire feed rate 18mm/s, electric arc 5mm long, tungsten electrode extension elongation is 5mm, and speed of welding is 5mm/s, and the distance of flux-cored wire and tungsten electrode is 20mm；
(3) welding current 200A, wire feed rate 20mm/s, electric arc 3mm long, tungsten electrode extension elongation is 7mm, and speed of welding is 20mm/s, and the distance of flux-cored wire and tungsten electrode is 10mm；
(4) welding current 250A, wire feed rate 25mm/s, electric arc 3mm long, tungsten electrode extension elongation is 7mm, and speed of welding is 15mm/s, and the distance of flux-cored wire and tungsten electrode is 15mm.
The weld seam obtained using above-mentioned technological parameter all shows surface topography and Cross Section Morphology as depicted in figures 5 and 6, does not produce splashing in welding process and powder amount is small, and face of weld quality is good, and face of weld and cross section do not produce stomata.With GX-51+DT70 observation by light microscope weld seams, the defects such as stomata, slag inclusion are not found, as shown in Figure 7.Hardness test is carried out to sample using MHV-2000 types Vickers, the hardness of Welded Joints is tested, ram load is 10kg, it was found that its highest hardness appears in commissure, average out to 260.2HV, the average hardness of weld seam is 230HV, and the average hardness of heat affected area is 203.8HV, and its hardness meets the requirement of Underwater Welding standard.
Using same process parameter, by, rather than in molten bath, welding process can be contaminated along with substantial amounts of splashing, tungsten electrode surface, and face of weld and section produce stomata, have had a strong impact on welding quality, as shown in Figure 8, Figure 9 in flux-cored wire feeding electric arc.Illustrate that the method for the present invention and equipment can be welded suitable for local dry cavity under water.
Exemplary description has been done to the present invention above; it should be noted that; in the case where core of the invention is not departed from, any simple deformation, modification or other skilled in the art can not spend the equivalent of creative work to each fall within protection scope of the present invention.
Claims (9)
1. flux-cored wire welding with filler wire method, it is characterised in that striking and form welding pool on workpiece using tungsten electrode welding gun,
There is metallurgical reaction in flux-cored wire, suppress using flux-cored wire transition alloy elements vertically into welding pool in molten bath
The harm that moisture and iron rust are caused；In welding direction flux-cored wire be located at tungsten electrode front, flux-cored wire end center with
Tungsten electrode end is centrally located in same level plane.
2. flux-cored wire welding with filler wire method according to claim 1, it is characterised in that welding current is 160-
280A, wire feed rate is 18-30mm/s, and a length of 3-5mm of electric arc, tungsten electrode extension elongation is 5-7mm；Welding speed
It is 2-20mm/s to spend, the distance (horizontal range) at medicine core end of welding portion center and tungsten electrode end center in welding direction
It is 3-20mm.
3. flux-cored wire welding with filler wire method according to claim 1, it is characterised in that welding current is 200-
250A, wire feed rate is 20-25mm/s, and a length of 3-5mm of electric arc, tungsten electrode extension elongation is 5-7mm；Welding speed
It is 5-15mm/s to spend, the distance (horizontal range) at medicine core end of welding portion center and tungsten electrode end center in welding direction
It is 10-20mm.
4. flux-cored wire filler wire welding equipment, it is characterised in that including TIG welding guns and wire feed annex, wire feed annex is installed
On TIG welding guns, wire feed annex includes filament mouth, enters silk mouthful and adapter sleeve, wherein：
Enter silk mouthful, for being connected with wire-feeding pipe and wire-feed motor, so that flux-cored wire enters wire feed annex and according to wire feed annex
Direction carry out wire feed；
Filament mouth, for being input into flux-cored wire in welding pool；
Adapter sleeve, for being connected with TIG welding guns and being fixed, so that wire feed annex is arranged on forms one on TIG welding guns,
Adjust the attitude of wire feed annex simultaneously so that flux-cored wire from filament mouth out after vertically into in welding pool, along weldering
The front that flux-cored wire on direction is located at tungsten electrode is connect, and flux-cored wire end center is centrally located at same level with tungsten electrode end
In plane.
5. flux-cored wire filler wire welding equipment according to claim 4, it is characterised in that the adapter sleeve uses clip,
By rotation and the mobile adjustment to realize wire feed annex attitude.
6. flux-cored wire filler wire welding equipment according to claim 4, it is characterised in that the TIG welding guns are hand
Work TIG welding guns or automatic TIG welding rifle.
7. flux-cored wire filler wire welding equipment according to claim 4, it is characterised in that selection will by adapter sleeve
Wire feed annex is fixed on the outside of the ceramic nozzle of TIG welding guns, and is adjusted.
8. such as answering in one of claim 1-3 described flux-cored wire welding with filler wire method under water local dry cavity welding
With.
9. such as answering in one of claim 4-7 described flux-cored wire filler wire welding equipment under water local dry cavity welding
With.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201510891509.4A CN106825870A (en) | 2015-12-07 | 2015-12-07 | Flux-cored wire welding with filler wire method and its device |
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| CN201510891509.4A CN106825870A (en) | 2015-12-07 | 2015-12-07 | Flux-cored wire welding with filler wire method and its device |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108608097A (en) * | 2018-06-28 | 2018-10-02 | 中国华冶科工集团有限公司 | A kind of vertical weld bond one side welding with back formation welding method of common downcomer heavy wall |
| CN109175585A (en) * | 2018-09-26 | 2019-01-11 | 江苏天工科技股份有限公司 | Adjustable tungsten electrode welding gun |
| CN109175584A (en) * | 2018-09-26 | 2019-01-11 | 江苏天工科技股份有限公司 | Elastic press type cools down titanic alloy machining auxiliary device |
| CN114799422A (en) * | 2022-03-03 | 2022-07-29 | 湘潭大学 | Wire filling GTAW self-adaptive wire filling method for 3D broken line weld joint real-time tracking |
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| JPS5684172A (en) * | 1979-12-10 | 1981-07-09 | Hitachi Ltd | 2-electrode tig welding method |
| US4441012A (en) * | 1981-12-14 | 1984-04-03 | General Electric Company | Method and apparatus for controlling heating power during the application of molten filler material to a workpiece |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108608097A (en) * | 2018-06-28 | 2018-10-02 | 中国华冶科工集团有限公司 | A kind of vertical weld bond one side welding with back formation welding method of common downcomer heavy wall |
| CN109175585A (en) * | 2018-09-26 | 2019-01-11 | 江苏天工科技股份有限公司 | Adjustable tungsten electrode welding gun |
| CN109175584A (en) * | 2018-09-26 | 2019-01-11 | 江苏天工科技股份有限公司 | Elastic press type cools down titanic alloy machining auxiliary device |
| CN109175584B (en) * | 2018-09-26 | 2024-08-13 | 江苏天工科技股份有限公司 | Spring-type cooling titanium alloy processing auxiliary device |
| CN114799422A (en) * | 2022-03-03 | 2022-07-29 | 湘潭大学 | Wire filling GTAW self-adaptive wire filling method for 3D broken line weld joint real-time tracking |
| CN114799422B (en) * | 2022-03-03 | 2023-08-25 | 湘潭大学 | Filler wire GTAW self-adaptive filler wire method for real-time tracking of 3D broken line weld joint |
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