CN104439647A - TIG welding double-layer air flow protection device for ferrite steel and welding method - Google Patents
TIG welding double-layer air flow protection device for ferrite steel and welding method Download PDFInfo
- Publication number
- CN104439647A CN104439647A CN201410620266.6A CN201410620266A CN104439647A CN 104439647 A CN104439647 A CN 104439647A CN 201410620266 A CN201410620266 A CN 201410620266A CN 104439647 A CN104439647 A CN 104439647A
- Authority
- CN
- China
- Prior art keywords
- welding
- tig
- gas
- double
- flow
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
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
- B23K9/16—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
- B23K9/325—Devices for supplying or evacuating shielding gas
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Plasma & Fusion (AREA)
- Mechanical Engineering (AREA)
- Arc Welding In General (AREA)
- Butt Welding And Welding Of Specific Article (AREA)
Abstract
The invention discloses a TIG welding double-layer air flow protection device for ferrite steel and a welding method and belongs to the field of welding. The TIG welding double-layer air flow protection device for the ferrite steel is characterized in that the device can be installed on any TIG welding gun, can be disassembled and can be flexibly reused. The device is connected with other gases when the device and the TIG welding gun are fixed and matched in use, in the welding process, required gases are led in continuously; thus, in the welding process, besides inert gas protection provided by the TIG welding gun itself, the welding gun is protected by the other gases on the outer layer, and therefore the effect of double-layer air flow protection can be achieved conveniently. A main body component 1 of the device is a conical cavity, and therefore the gases can be saved and a welding seam can be protected more effectively. According to the welding method, an isometric crystal can be formed in the center of the welding seam more easily, the welding seam can obtain larger depth-to-width ratio, the problem of oxidation in the welding process can be prevented more effectively, and oxidation burning loss of tungsten electrodes can be avoided. In addition, the device is simple and compact in structure, low in cost and flexible to use.
Description
Technical field
The present invention a kind of ferritic steel TIG welded steel double air-flow protection device and welding method; belong to welding technology field; be applicable to TIG welding, be specifically related to the technical scheme that a kind of TIG be applied under double-layer air-flow protection welds ferritic steel welder and welding method.
Background technology
TIG solder technology due to the advantage of himself uniqueness, as good in welding stability, welding quality is good, without splash, easily be automated control and be suitable for plate sheet welding etc., be widely used in the industries such as aircraft manufacturing, nuclear power, chemical industry, weaving and boiler.But TIG welding also has its weak point, be exactly that to weld fusion penetration shallow for TIG, be difficult to obtain larger fusion penetration, usual depth-to-width ratio only has about 0.2, thus limits its application in large thick plates.At present for the problem that TIG welding penetration is shallow, solution mainly contains vacuum TIG weldering, A-TIG weldering and dual stream protection weldering etc., but vacuum TIG soldering equipment is complicated, and cost is high, and be not suitable for the welding of large workpiece, greatly limit its generally application in the industry yet; And A-TIG weldering needs to apply one deck activating agent in commissure, just can reach the object increasing fusion penetration, but the research and development of activating agent are prepared, not only increase welding cost and operation inconvenience, reduce welding efficiency, and its depth-to-width ratio is about 0.5; By contrast, double-layer air-flow protection welding cost is lower, and operation is simpler, and easily be automated production, when passing into appropriate outer gas, appearance of weld is attractive in appearance, quality good, welding arc stablility, and tungsten electrode scaling loss alleviates, and depth-to-width ratio significantly improves.In addition, after in welding process, weld metal is heated by the electric arc simultaneously fusing, with air cooling but and different in all directions cooldown rate, fast along the cooling of plate length direction, thickness direction cooling is slow, thus directly determine molten bath in process of setting crystal grain along plate length direction growth rate faster than thickness direction, finally in weld seam, form column crystal, thus reduce its plasticity and toughness.Therefore, can be directly just very meaningful in the welding method of weld seam acquisition equiax crystal after welding.
Through finding the literature search of prior art; Lu Shanping; Li Dongjie; " double-layer air-flow protection TIG welding method " that Li Dianzhong and Li Yiyi etc. deliver on " welding journal " the 2nd phase in 2010; propose in this article to adopt a kind of double-layer air-flow protection welding method (the method patent applied for; number of patent application 200810229512.X); the method is by changing Bath Heat-Transfer convection model; make TIG weld the more common arc-welding depth-to-width ratio of molten bath depth-to-width ratio and increase 2-3 doubly; avoid the oxidization burning loss of tungsten electrode simultaneously, but do not occur equiax crystal in its weld seam.In addition, when TIG is welded in field construction, its wind resisting stability is poor, thus constructs in the wild to it and make troubles.Windproof barrier is mainly added to this solution, this loaded down with trivial details inconvenience that also seems.A kind ofly double-layer air-flow protection TIG welder simple, easy to use and welding method is made, so R and D double-layer air-flow protection TIG welder and welding method have its theory and actual use value very much so be badly in need of in reality at present disclose.
Summary of the invention
The object of a kind of ferritic steel of the present invention TIG welded steel double air-flow protection device and welding method be in order to provide a kind of simple to operate, with low cost, use and increase TIG welding penetration flexibly and the double-layer air-flow protection TIG welder and the welding method that obtain equi-axed crystal at weld seam.The method is on TIG welding gun, install a gas shield device additional, to realize double-layer air-flow protection welding by connecting other gas, to increase fusion penetration, forms equiax crystal in weld metal zone.
A kind of ferritic steel TIG welded steel double air-flow protection device of the present invention, it is characterized in that this protective device is connected to main body with a stainless steel conical bores 1 and a cylindrical transparent cover 4, be open state up and down, the first half both sides respectively have a conduit to connect gas cylinder and Pressure gauge respectively, the ventilating joint 2 of this device cavity top end is connected with TIG welding gun, junction is provided with seal with elastometic washer in case leak-stopping gas, the other end is then placed on welded piece, do relative motion with welded piece in welding process, when ventilating joint 2 is connected with desired gas, in welding process, by constantly passing into this gas to gas hood inner chamber, just the protective layer of this gas can be formed outward at the inertia shielding gas flow of TIG itself, realize double-layer air-flow protection, can the Pressure gauge of real-time monitoring device chamber pressure be connected with pressure tapping 3, the transparent cylindrical transparent cover 4 observing Molten Pool Shape and the type of flow and electric arc pattern in welding process is positioned at the latter half of stainless steel conical bores 1 of the present invention.
The welding method of above-mentioned a kind of ferritic steel TIG welded steel double air-flow protection TIG welder, is characterized in that concrete operation method step is:
1) above-mentioned ferritic steel TIG welded steel double air-flow protection TIG welder is placed on TIG welding gun;
2), before welding, with sand paper, the rusty stain greasy dirt polishing of welded piece surface is totally exposed metallochrome, be then placed on the workbench on welding tractor;
3) mounted for step 1) TIG welding gun is fixed on jig, regulates welding gun and step 2 by adjusting clamp) relative position of welded piece, make relative distance be 1-3mm;
4) internal layer gas Ar gas is set, throughput 10-15L/min and outer gas Ar or N of protective device
2, flow 15-20L/min, speed of welding 80-100mm/min, welding current numerical value 80-120A, starts welding tractor simultaneously and plays arc welding when welding starts;
5) stop welding tractor and blow-out at the end of welding simultaneously;
6) blow-out terminates the outer bed device air-flow of rear 1-2s closedown.
A kind of ferritic steel of the present invention with TIG welded steel double air-flow protection device and welding method thereof compared with prior art, there is following beneficial effect:
1, structure is simple, is easy to make.
2, with low cost.
3, easy to use and flexible.
When 4, the present invention being fixed on any TIG welding gun, by connecting other desired gas, the effect of dual stream protection just can be obtained.
5, can fusion penetration be increased, improve the depth-to-width ratio of weld seam significantly, can more than 15% be improved.
6, equi-axed crystal can be formed in weld metal zone.
7, compared with welding with current double-layer air-flow TIG, this device is detachably reused after being arranged on TIG welding gun, and avoids the special transformation to TIG welding gun.Molten Pool Shape and the type of flow thereof and electric arc pattern can be observed in welding process, be beneficial to real-time monitoring.
8, the present invention also has wind-shielding function concurrently, and energy and TIG welding gun are fixed and done relative motion with workpiece, facilitate easy to operate, easily are automated.
Accompanying drawing explanation
Fig. 1 is the structural representation of apparatus of the present invention
Label in figure is: 1. conical airstream compartment 2. ventilating joint
3. pressure tapping 4. cylindrical transparent cover
Fig. 2 is single ply protective gas welding point micro-organization chart
Fig. 3 is double shielding gas welding point micro-organization chart.
Detailed description of the invention
Below in conjunction with case study on implementation, the present invention will be described, and present embodiment is implemented under premised on technical solution of the present invention, give detailed embodiment and concrete operating process, but protection scope of the present invention is not limited to following embodiment.
Contrast test:
Welded piece material: 904 ferritic stainless steels, welded piece size: 200mm × 60mm × 3mm
Welding machine: epoch WS-250, tungsten electrode: cerium tungsten Ф 3.2, protective gas: Ar, 10L/min.
Welding conditions: electrode extension 3mm, arc length 2mm, straight polarity direct current, Ar entraining air stream amount 10L/min, welding current 80A, speed of welding 100cm/min.
Postwelding, the depth-to-width ratio of the weld seam of survey is 0.46.Weld seam is whole column crystal (as Fig. 2).
Embodiment 1:
This protective device is connected to main body with a stainless steel conical bores 1 and a cylindrical transparent cover 4, be open state up and down, both sides respectively have a joint to be connected with the external world, the ventilating joint 2 of this device cavity top end is connected with TIG welding gun, junction is provided with seal with elastometic washer in case leak-stopping gas, the other end is then placed on welded piece, do relative motion with welded piece in welding process, when ventilating joint 2 is connected with desired gas, in welding process, by constantly passing into this gas to gas hood inner chamber, just the protective layer of this gas can be formed outward at the inertia shielding gas flow of TIG itself, realize double-layer air-flow protection, can the Pressure gauge of real-time monitoring device chamber pressure be connected with pressure tapping 3, the transparent cylindrical transparent cover 4 observing Molten Pool Shape and the type of flow and electric arc pattern in welding process is positioned at the latter half of stainless steel conical bores 1 of the present invention, concrete operation method step is:
1) double-layer gas shield device of the present invention is placed on TIG welding gun;
2), before welding, with sand paper, the rusty stain greasy dirt polishing of welded piece surface is totally exposed metallochrome, be then placed on the workbench on welding tractor;
3) mounted for step 1) TIG welding gun is fixed on jig, regulates welding gun and step 2 by adjusting clamp) relative position of welded piece, make relative distance be 2mm;
4) set internal layer gas Ar gas, throughput 10L/min and the outer gas N2 of protective device, flow 15L/min, speed of welding 100cm/min, welding current numerical value 80A, starts welding tractor simultaneously and plays arc welding when welding starts;
5) stop welding tractor and blow-out at the end of welding simultaneously;
6) blow-out terminates the outer bed device air-flow of rear 2s closedown.
Welded piece material: 904 ferritic stainless steels, welded piece size: 200mm × 60mm × 3mm
Welding machine: epoch WS-250, tungsten electrode: in cerium tungsten Ф 3.2, protective gas: Ar()+N
2(outward).
Straight polarity direct current, postwelding, the depth-to-width ratio of this weld seam of survey is 0.68.Weld pipe mill is equiax crystal, and outside is column crystal, and recording equiax crystal district crystal grain mean intercept according to GB/T 6394-2002 resection is 47.7 μm.
Embodiment 2:
This protective device is connected to main body with a stainless steel conical bores 1 and a cylindrical transparent cover 4, be open state up and down, both sides respectively have a joint to be connected with the external world, the ventilating joint 2 of this device cavity top end is connected with TIG welding gun, junction is provided with seal with elastometic washer in case leak-stopping gas, the other end is then placed on welded piece, do relative motion with welded piece in welding process, when ventilating joint 2 is connected with desired gas, in welding process, by constantly passing into this gas to gas hood inner chamber, just the protective layer of this gas can be formed outward at the inertia shielding gas flow of TIG itself, realize double-layer air-flow protection, can the Pressure gauge of real-time monitoring device chamber pressure be connected with pressure tapping 3, the transparent cylindrical transparent cover 4 observing Molten Pool Shape and the type of flow and electric arc pattern in welding process is positioned at the latter half of stainless steel conical bores 1 of the present invention, it is characterized in that concrete operation method step is:
1) double-layer gas shield device of the present invention is placed on TIG welding gun;
2), before welding, with sand paper, the rusty stain greasy dirt polishing of welded piece surface is totally exposed metallochrome, be then placed on the workbench on welding tractor;
3) mounted for step 1) TIG welding gun is fixed on jig, regulates welding gun and step 2 by adjusting clamp) relative position of welded piece, make relative distance be 3mm;
4) set internal layer gas Ar gas, throughput 10L/min and the outer gas N2 of protective device, flow 15L/min, speed of welding 100cm/min, welding current numerical value 100A, starts welding tractor simultaneously and plays arc welding when welding starts;
5) stop welding tractor and blow-out at the end of welding simultaneously;
6) blow-out terminates the outer bed device air-flow of rear 1s closedown.
Welded piece material: 904 ferritic stainless steels, welded piece size: 200mm × 60mm × 3mm
Welding machine: epoch WS-250, tungsten electrode: in cerium tungsten Ф 3.2, protective gas: Ar()+N
2(outward).
Straight polarity direct current, postwelding, the depth-to-width ratio of this weld seam of survey is 0.53.Weld pipe mill is equiax crystal, and outside is column crystal, and recording equiax crystal district crystal grain mean intercept according to GB/T 6394-2002 resection is 55.6 μm.
Claims (3)
1. a ferritic steel TIG welded steel double air-flow protection device, it is characterized in that this protective device is connected to main body with a stainless steel conical bores (1) and a cylindrical transparent cover (4), be open state up and down, the first half both sides respectively have a conduit to connect gas cylinder and Pressure gauge respectively, the ventilating joint (2) of this device cavity top end is connected with TIG welding gun, junction is provided with seal with elastometic washer in case leak-stopping gas, the other end is then placed on welded piece, do relative motion with welded piece in welding process, when ventilating joint (2) is connected with desired gas, in welding process, by constantly passing into this gas to gas hood inner chamber, just the protective layer of this gas can be formed outward at the inertia shielding gas flow of TIG itself, realize double-layer air-flow protection, can the Pressure gauge of real-time monitoring device chamber pressure be connected with pressure tapping (3), the transparent cylindrical transparent cover (4) observing Molten Pool Shape and the type of flow and electric arc pattern in welding process is positioned at the latter half of stainless steel conical bores (1) of the present invention.
2. the welding method of a kind of ferritic steel TIG welded steel double air-flow protection device described in claim 1, is characterized in that concrete operation method step is:
1) above-mentioned ferritic steel TIG welded steel double gas shield device is placed on TIG welding gun;
2), before welding, with sand paper, the rusty stain greasy dirt polishing of welded piece surface is totally exposed metallochrome, be then placed on the workbench on welding tractor;
3) mounted for step 1) TIG welding gun is fixed on jig, regulates welding gun and step 2 by adjusting clamp) relative position of welded piece, make relative distance be 1-3mm;
4) internal layer gas Ar gas is set, throughput 10-15L/min and outer gas Ar or N of protective device
2, flow 15-20L/min, speed of welding 80-100mm/min, welding current numerical value 80-120A, starts welding tractor simultaneously and plays arc welding when welding starts;
5) stop welding tractor and blow-out at the end of welding simultaneously;
6) blow-out terminates the outer bed device air-flow of rear 1-2s closedown.
3., according to ferritic steel TIG welded steel double air-flow protection device a kind of described in claim 1, it is characterized in that described conical bores (1) manufactured materials is austenitic stainless steel, cylindrical transparent cover (4) manufactured materials is lucite.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410620266.6A CN104439647A (en) | 2014-11-07 | 2014-11-07 | TIG welding double-layer air flow protection device for ferrite steel and welding method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410620266.6A CN104439647A (en) | 2014-11-07 | 2014-11-07 | TIG welding double-layer air flow protection device for ferrite steel and welding method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104439647A true CN104439647A (en) | 2015-03-25 |
Family
ID=52886822
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410620266.6A Pending CN104439647A (en) | 2014-11-07 | 2014-11-07 | TIG welding double-layer air flow protection device for ferrite steel and welding method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104439647A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111014911A (en) * | 2019-12-23 | 2020-04-17 | 内蒙古第一机械集团股份有限公司 | Multi-angle quick-change welding gas protection dragging cover |
| CN113385897A (en) * | 2021-06-11 | 2021-09-14 | 山西太钢不锈钢股份有限公司 | Preparation method of ferrite stainless steel thin-wall welded pipe |
Citations (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4166940A (en) * | 1976-03-26 | 1979-09-04 | Combustion Engineering, Inc. | Dual-gas shielding method |
| DE3435145A1 (en) * | 1984-09-25 | 1986-04-03 | Siemens AG, 1000 Berlin und 8000 München | Micro TIG welding torch |
| US4680440A (en) * | 1981-04-07 | 1987-07-14 | Barlet Loren E | Shielding arrangement and method for TIG |
| US5714729A (en) * | 1995-06-30 | 1998-02-03 | Kabushiki Kaisha Toshiba | TIG welding method and welding torch therefor |
| CN2897524Y (en) * | 2006-03-29 | 2007-05-09 | 中国海洋石油总公司 | High-pressure cyclone double-layer gas protection welding gun |
| CN201012424Y (en) * | 2006-12-29 | 2008-01-30 | 贵州永红航空机械有限责任公司 | Welding gun double-layer protection nozzle |
| CN101417363A (en) * | 2008-12-10 | 2009-04-29 | 中国科学院金属研究所 | Tungsten-electrode anti-oxidation double-layer air-flow protection welding method |
| CN101920384A (en) * | 2009-06-10 | 2010-12-22 | 中国科学院金属研究所 | Tungsten electrode inert gas protected welding gun in double-layered airflow structure |
| CN102151957A (en) * | 2011-03-28 | 2011-08-17 | 兰州理工大学 | Gas molten pool coupling active welding method |
| CN102764930A (en) * | 2012-07-19 | 2012-11-07 | 中国科学院金属研究所 | TIG (tungsten inert gas) welding method for high-nitrogen steel under double-layer gas flow shielding |
| CN102896408A (en) * | 2012-11-09 | 2013-01-30 | 南通星瑞热交换容器有限公司 | Argon-arc-welding welding gun |
| CN103934556A (en) * | 2014-04-10 | 2014-07-23 | 哈尔滨汽轮机厂有限责任公司 | Auxiliary protection gas hood of automatic TIC welder head |
-
2014
- 2014-11-07 CN CN201410620266.6A patent/CN104439647A/en active Pending
Patent Citations (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4166940A (en) * | 1976-03-26 | 1979-09-04 | Combustion Engineering, Inc. | Dual-gas shielding method |
| US4680440A (en) * | 1981-04-07 | 1987-07-14 | Barlet Loren E | Shielding arrangement and method for TIG |
| DE3435145A1 (en) * | 1984-09-25 | 1986-04-03 | Siemens AG, 1000 Berlin und 8000 München | Micro TIG welding torch |
| US5714729A (en) * | 1995-06-30 | 1998-02-03 | Kabushiki Kaisha Toshiba | TIG welding method and welding torch therefor |
| CN2897524Y (en) * | 2006-03-29 | 2007-05-09 | 中国海洋石油总公司 | High-pressure cyclone double-layer gas protection welding gun |
| CN201012424Y (en) * | 2006-12-29 | 2008-01-30 | 贵州永红航空机械有限责任公司 | Welding gun double-layer protection nozzle |
| CN101417363A (en) * | 2008-12-10 | 2009-04-29 | 中国科学院金属研究所 | Tungsten-electrode anti-oxidation double-layer air-flow protection welding method |
| CN101920384A (en) * | 2009-06-10 | 2010-12-22 | 中国科学院金属研究所 | Tungsten electrode inert gas protected welding gun in double-layered airflow structure |
| CN102151957A (en) * | 2011-03-28 | 2011-08-17 | 兰州理工大学 | Gas molten pool coupling active welding method |
| CN102764930A (en) * | 2012-07-19 | 2012-11-07 | 中国科学院金属研究所 | TIG (tungsten inert gas) welding method for high-nitrogen steel under double-layer gas flow shielding |
| CN102896408A (en) * | 2012-11-09 | 2013-01-30 | 南通星瑞热交换容器有限公司 | Argon-arc-welding welding gun |
| CN103934556A (en) * | 2014-04-10 | 2014-07-23 | 哈尔滨汽轮机厂有限责任公司 | Auxiliary protection gas hood of automatic TIC welder head |
Non-Patent Citations (2)
| Title |
|---|
| 中国机械工程学会焊接学会: "《焊接手册 第1卷 焊接方法及设备 第3版》", 31 January 2008 * |
| 陆善平等: "双层气流保护TIG焊接方法", 《焊接学报》, vol. 31, no. 02, 28 February 2010 (2010-02-28), pages 21 - 24 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111014911A (en) * | 2019-12-23 | 2020-04-17 | 内蒙古第一机械集团股份有限公司 | Multi-angle quick-change welding gas protection dragging cover |
| CN113385897A (en) * | 2021-06-11 | 2021-09-14 | 山西太钢不锈钢股份有限公司 | Preparation method of ferrite stainless steel thin-wall welded pipe |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN105772927B (en) | A kind of AFA3G upper pipe seat of fuel component electro-beam welding method | |
| CN103817448A (en) | Gas shielding device for titanium alloy laser-MIG (metal inert gas welding) hybrid welding | |
| CN112894087B (en) | Tube plate nickel-based alloy double-tungsten-electrode single-hot-wire automatic tungsten electrode argon arc welding surfacing process | |
| CN203140951U (en) | Gas protection device for all-position tube plate automatic argon arc welding | |
| CN102744499A (en) | Double-side double-arc welding process for root layer of pipeline | |
| CN108723557A (en) | A kind of welding method of cylinder | |
| CN103692060B (en) | A kind of �� 1.6 solid wire CO2The welding process of shielded welding | |
| CN103862183A (en) | High-efficiency welding method of stainless steel composite board | |
| CN105195875B (en) | Lockhole effect TIG deep penetration welding welding guns | |
| CN207735775U (en) | A kind of device of the laser-arc hybrid welding in industry of coating steel pipe | |
| CN202701575U (en) | Double-faced dual-arc welding device of pipe root layer | |
| CN104439647A (en) | TIG welding double-layer air flow protection device for ferrite steel and welding method | |
| Wang et al. | Innovative methodology and database for underwater robot repair welding: a technical note | |
| CN108687429A (en) | The double electric double wire hidden arc welding welding methods of high-strength steel sheet | |
| CN203778936U (en) | Device for welding high-nitrogen austenite stainless steel medium plate | |
| CN107570845A (en) | A kind of automatic activating-tungsten inert gas welding connects method | |
| CN207757094U (en) | A kind of laser soldering device with refrigerating function | |
| CN104907674A (en) | Welding method and device of high-nitrogen austenitic stainless steel medium plate | |
| CN202271106U (en) | Novel titanium metal enclosed type continuous welding device | |
| CN102626813A (en) | Coupling-arc AA-TIG welding method | |
| CN205702805U (en) | A kind of novel narrow gap gas shield welding rifle | |
| CN114226925A (en) | Stainless steel workpiece butt deep-melting argon arc welding method | |
| CN106583892A (en) | Steel box girder unit part stiffening rib welding method | |
| CN101733526A (en) | Process of manual submerged-arc welding in welding position of doorframe and tower section | |
| CN206351293U (en) | Integral type flux-cored wire TIG welds welding gun |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20150325 |