CN110587081A - Steel pipe continuous argon arc welding weld back protection device - Google Patents
Steel pipe continuous argon arc welding weld back protection device Download PDFInfo
- Publication number
- CN110587081A CN110587081A CN201910820874.4A CN201910820874A CN110587081A CN 110587081 A CN110587081 A CN 110587081A CN 201910820874 A CN201910820874 A CN 201910820874A CN 110587081 A CN110587081 A CN 110587081A
- Authority
- CN
- China
- Prior art keywords
- polyurethane
- argon
- pipe
- gasbag
- airbag
- 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
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 title claims abstract description 190
- 229910052786 argon Inorganic materials 0.000 title claims abstract description 95
- 238000003466 welding Methods 0.000 title claims abstract description 64
- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 17
- 239000010959 steel Substances 0.000 title claims abstract description 17
- 239000007789 gas Substances 0.000 claims abstract description 45
- 229920002635 polyurethane Polymers 0.000 claims description 102
- 239000004814 polyurethane Substances 0.000 claims description 102
- 238000007789 sealing Methods 0.000 claims description 65
- NGONBPOYDYSZDR-UHFFFAOYSA-N [Ar].[W] Chemical compound [Ar].[W] NGONBPOYDYSZDR-UHFFFAOYSA-N 0.000 claims description 2
- 229910052751 metal Inorganic materials 0.000 abstract description 22
- 239000002184 metal Substances 0.000 abstract description 22
- 238000000034 method Methods 0.000 abstract description 7
- 229910001338 liquidmetal Inorganic materials 0.000 abstract description 6
- 230000008569 process Effects 0.000 abstract description 6
- 238000005260 corrosion Methods 0.000 description 3
- 230000007797 corrosion Effects 0.000 description 3
- 230000001681 protective effect Effects 0.000 description 3
- WFKWXMTUELFFGS-UHFFFAOYSA-N tungsten Chemical compound [W] WFKWXMTUELFFGS-UHFFFAOYSA-N 0.000 description 3
- 229910052721 tungsten Inorganic materials 0.000 description 3
- 239000010937 tungsten Substances 0.000 description 3
- 229910045601 alloy Inorganic materials 0.000 description 2
- 239000000956 alloy Substances 0.000 description 2
- 230000003647 oxidation Effects 0.000 description 2
- 238000007254 oxidation reaction Methods 0.000 description 2
- CWYNVVGOOAEACU-UHFFFAOYSA-N Fe2+ Chemical compound [Fe+2] CWYNVVGOOAEACU-UHFFFAOYSA-N 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 229910002065 alloy metal Inorganic materials 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000004021 metal welding Methods 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 238000005096 rolling process Methods 0.000 description 1
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
-
- 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
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Plasma & Fusion (AREA)
- Mechanical Engineering (AREA)
- Arc Welding In General (AREA)
Abstract
The invention discloses a device for protecting the back of a welding seam of a steel pipe by continuous argon arc welding, which relates to the technical field of steel pipe welding, and aims to solve the problem that the molten metal of a welding seam on the back of the welding seam is in a molten state and is not protected by argon in the existing argon arc welding process for continuously welding metal pipes, so that the liquid metal of the molten pool is oxidized and burnt, the device comprises a prefabricated pipe and a finished pipe, wherein the prefabricated pipe is positioned on the right side of the finished pipe, one side of the prefabricated pipe, which is close to the finished pipe, is provided with an argon pipe air inlet interface, the bottom end of the argon pipe air inlet interface is connected with an argon pipe flow passage, the argon pipe flow passage is sleeved in the finished pipe, and the outer ring of the argon pipe flow. The invention ensures that the metal in the molten state on the welding pool at the back of the welding line is protected by argon gas in the process of continuously welding the metal pipe by argon arc welding, avoids the liquid metal in the molten pool from being oxidized and burnt, and ensures the quality of the welding line.
Description
Technical Field
The invention relates to the technical field of steel pipe welding, in particular to a steel pipe continuous argon arc welding weld joint back protection device.
Background
The continuous argon arc welding mainly adopts a continuous welding mode as a thin-wall steel pipe, an alloy metal pipe and a non-ferrous metal pipe, has the advantages of low cost, high welding strength and less metal oxidation of a welding line, and can be suitable for various different metals which are difficult to weld by common arc welding. When argon arc welding is carried out, the argon flow flowing out of the nozzle of the welding gun can play a role in preventing the oxidation of oxygen elements in air on high-temperature molten metal in a welding seam molten pool. Because the weld must be penetrated during welding, the metal on the back of the weld also contains liquid metal in a high-temperature molten state. The argon protection of the liquid metal on the back side is as important as the metal in the molten state of the weld pool on the front side, if the metal in the molten state of the weld pool on the back side loses the argon protection, part of alloy element components in welding parent metal can be burnt, the reduction of the content of the alloy elements in the weld can cause the corrosion resistance of the weld to be reduced, and the early corrosion of the pipe can be caused.
The production of metal pipes is mostly produced in a continuous forming welding mode, and the argon protection of a molten pool on the back of a welding seam in the moving process of the welding seam is difficult to achieve low cost and high quality, so that the improvement of the welding seam strength and the corrosion resistance of the metal welding pipe is restricted.
Disclosure of Invention
The invention provides a device for protecting the back of a welding seam in continuous argon arc welding of a steel pipe, which solves the problem that the molten pool liquid metal of the molten pool is oxidized and burnt because the molten pool metal of the welding seam on the back of the welding seam is in a molten state in the process of continuously welding a metal pipe by the existing argon arc welding is not protected by argon.
In order to achieve the purpose, the invention adopts the following technical scheme:
the utility model provides a steel pipe argon arc welding seam back protection device in succession, includes prefabricated tubular product and finished product tubular product, prefabricated tubular product is located finished product tubular product's right side, one side that prefabricated tubular product is close to finished product tubular product is equipped with the argon pipe interface of admitting air, the bottom of argon pipe interface of admitting air is connected with the argon pipe runner, and argon pipe runner cover establishes in finished product tubular product, the outer lane cover of argon pipe runner is equipped with the preceding sealed polyurethane gasbag that is located prefabricated tubular product one side, the right side of preceding sealed polyurethane gasbag is equipped with preceding sealed polyurethane gasbag front bezel, the left side of preceding sealed polyurethane gasbag is equipped with preceding sealed polyurethane gasbag backplate, one side that preceding sealed polyurethane gasbag backplate kept away from preceding sealed polyurethane gasbag is equipped with fixed cover and establishes the back seal polyurethane gasbag in argon pipe runner outer lane, and the back seal polyurethane gasbag is located finished product tubular product, the right side of back seal polyurethane gasbag is equipped with baffle before the back seal polyurethane gasbag, the left side of back seal polyurethane gasbag is equipped with back seal polyurethane gasbag backplate, the top that one side that the argon gas pipe runner is close to back seal polyurethane gasbag front baffle is equipped with the argon gas runner and goes out the gas port, the top of one side that prefabricated tubular product and finished product tubular product are close to each other is equipped with argon tungsten electrode arc and welds welder.
Preferably, one side of the front sealing polyurethane airbag, which is close to the rear sealing polyurethane airbag, is fixedly connected with a front sealing polyurethane airbag inflation inlet, and one side of the rear sealing polyurethane airbag, which is close to the front sealing polyurethane airbag inflation inlet, is fixedly connected with a rear sealing polyurethane airbag inflation inlet.
Preferably, the front baffle of the front sealing polyurethane airbag and the rear baffle of the front sealing polyurethane airbag are fixedly sleeved on the outer ring of the argon pipe flow channel.
Preferably, the rear sealing polyurethane airbag front baffle and the rear sealing polyurethane airbag rear baffle are fixedly sleeved on the outer ring of the argon pipe flow passage.
Preferably, an argon back protection gas exhaust area is arranged between the front sealing polyurethane airbag and the rear sealing polyurethane airbag.
The invention has the beneficial effects that: the metal in the molten state on the welding pool on the back of the welding line is protected by the argon gas in the process of argon arc welding continuous welding metal pipes, the liquid metal in the molten pool is prevented from being oxidized and burnt, and the welding quality is ensured.
Drawings
FIG. 1 is a schematic structural diagram of a back side protection device for a steel pipe continuous argon arc welding weld joint according to the present invention;
FIG. 2 is a schematic top view of the protection device for the back of the steel pipe continuous argon arc welding seam according to the present invention.
In the figure: the device comprises a prefabricated pipe 1, an argon pipe inlet interface 2, a front sealing polyurethane airbag front baffle 3, a front sealing polyurethane airbag 4, a front sealing polyurethane airbag inflation inlet 5, a front sealing polyurethane airbag rear baffle 6, a 7 tungsten electrode argon arc welding gun, an argon pipe flow channel 8, an argon flow channel 9, a rear sealing polyurethane airbag inflation inlet 10, a rear sealing polyurethane airbag front baffle 11, a rear sealing polyurethane airbag 12, a rear sealing polyurethane airbag rear baffle 13, a finished pipe 14 and an argon back protective gas exhaust area 15.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments.
Referring to fig. 1-2, a steel pipe continuous argon arc welding weld back protection device comprises a prefabricated pipe 1 and a finished pipe 14, the prefabricated pipe 1 is located on the right side of the finished pipe 14, an argon pipe air inlet interface 2 is arranged on one side of the prefabricated pipe 1 close to the finished pipe 14, an argon pipe flow channel 8 is connected to the bottom end of the argon pipe air inlet interface 2, the argon pipe flow channel 8 is sleeved in the finished pipe 14, a front sealing polyurethane airbag 4 located on one side of the prefabricated pipe 1 is sleeved on the outer ring of the argon pipe flow channel 8, a front sealing polyurethane airbag front baffle 3 is arranged on the right side of the front sealing polyurethane airbag 4, a front sealing polyurethane airbag rear baffle 6 is arranged on the left side of the front sealing polyurethane airbag 4, a rear sealing polyurethane airbag 12 fixedly sleeved on the outer ring of the argon pipe flow channel 8 is arranged on one side of the front sealing polyurethane airbag rear baffle 6 away from the front, and the rear sealing polyurethane airbag 12 is positioned in the finished product pipe 14, the right side of the rear sealing polyurethane airbag 12 is provided with a rear sealing polyurethane airbag front baffle 11, the left side of the rear sealing polyurethane airbag 12 is provided with a rear sealing polyurethane airbag rear baffle 13, the top of one side of the argon pipe runner 8, which is close to the rear sealing polyurethane airbag front baffle 11, is provided with an argon gas runner outlet 9, and the top of one side, which is close to the prefabricated pipe 1 and the finished product pipe 14, is provided with a tungsten electrode argon arc welding gun 7.
Preceding sealed polyurethane gasbag 4 is close to sealed polyurethane gasbag inflation inlet 5 before one side fixedly connected with of rear seal polyurethane gasbag 12, sealed polyurethane gasbag inflation inlet 10 behind one side fixedly connected with of sealed polyurethane gasbag inflation inlet 5 before rear seal polyurethane gasbag 12 is close to, preceding baffle 3 of sealed polyurethane gasbag and preceding sealed polyurethane gasbag backplate 6 are all fixed the cover and are established in the outer lane of argon pipe runner 8, baffle 11 before the sealed polyurethane gasbag and the equal fixed cover of rear seal polyurethane gasbag backplate 13 are established in the outer lane of argon pipe runner 8, be equipped with argon gas back protection gas exhaust area 15 between preceding sealed polyurethane gasbag 4 and the sealed polyurethane gasbag 12 of rear.
In this embodiment, first, the front sealing polyurethane airbag 4, the rear sealing polyurethane airbag 12, the front sealing polyurethane airbag front baffle 3 for fixing the front sealing polyurethane airbag 4, the front sealing polyurethane airbag rear baffle 6, the rear sealing polyurethane airbag front baffle 11, and the rear sealing polyurethane airbag rear baffle 13 form a sealing part of the protection device, and the argon gas conveying part is formed by the argon gas pipe inlet port 2, the argon gas pipe flow passage 8, and the argon gas flow passage outlet port 9.
The method is characterized in that wear-resistant polyurethane sealing air bags arranged at the front and the rear of an argon arc welding seam molten pool are used for sealing a metal pipe welding seam molten pool part, air at the sealing part in the metal pipe is continuously replaced through an argon gas supply runner, so that the sealing part is filled with argon gas to protect metal at the back of the welding seam molten pool, the air bags and the pipe are sealed after the wear-resistant polyurethane air bags are inflated, the air bags can still realize smaller friction resistance under the condition that the air bags are kept sealed with the inner wall of the metal pipe by adjusting the air pressure of the air bags, the argon gas supply runner is provided with an argon gas runner outlet at the part close to the inner side sealing air bags, the argon gas enters a cavity of the continuously welded metal pipe and is discharged from an exhaust area at the front part of the welding seam, a high-purity argon gas protection.
Before use, the polyurethane airbag is firstly inflated, then the protection device is placed in a pipe in a rolling and welding process, the outer diameter of a rear sealing polyurethane airbag 12 is the same as the inner diameter of a finished pipe 14 after welding, the outer diameter of a front sealing polyurethane airbag 4 is slightly larger than the inner diameter of the finished pipe 14 after welding, a tungsten electrode argon arc welding gun 7 is positioned between the front sealing polyurethane airbag 4 and the rear sealing polyurethane airbag 12 and close to the front sealing polyurethane airbag 4, the protection device is fixed, an independent welding seam back space is formed between the front sealing polyurethane airbag 4 and the rear sealing polyurethane airbag 12 after gas recharging, only an argon gas pipe gas outlet 9 and an argon gas back protection gas exhaust area 15 are communicated with the outside, a connecting gas pipe argon gas inlet interface 2 is communicated with an argon gas supply pipeline, argon gas is communicated with the outside through the argon gas pipe gas inlet interface 2, The argon gas pipe runner 8 gets into independent welding seam back space and then discharges through argon gas back protective gas exhaust area to argon gas runner gas outlet 9, and this space of replacement is high-purity protective argon gas through the flow of argon gas, plays the guard action to welding seam back molten bath.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and the technical solutions and the inventive concepts thereof according to the present invention should be equivalent or changed within the scope of the present invention.
Claims (5)
1. The utility model provides a steel pipe argon arc welding seam back protection device in succession, includes prefabricated tubular product (1) and finished product tubular product (14), its characterized in that, prefabricated tubular product (1) is located the right side of finished product tubular product (14), one side that prefabricated tubular product (1) is close to finished product tubular product (14) is equipped with argon gas pipe interface (2) that admits air, the bottom that argon gas pipe interface (2) admits air is connected with argon gas pipe runner (8), and argon gas pipe runner (8) cover establishes in finished product tubular product (14), the outer lane cover of argon gas pipe runner (8) is equipped with preceding sealed polyurethane gasbag (4) that are located prefabricated tubular product (1) one side, the right side of preceding sealed polyurethane gasbag (4) is equipped with preceding baffle (3) of preceding sealed polyurethane gasbag, preceding left side of sealed polyurethane gasbag (4) is equipped with preceding sealed polyurethane gasbag backplate (6), one side that preceding sealed polyurethane gasbag (4) was kept away from to preceding sealed polyurethane gasbag (6) is equipped with Fixed cover is established at back seal polyurethane gasbag (12) of argon pipe runner (8) outer lane, and back seal polyurethane gasbag (12) are located finished product tubular product (14), the right side of back seal polyurethane gasbag (12) is equipped with baffle (11) before the back seal polyurethane gasbag, the left side of back seal polyurethane gasbag (12) is equipped with back seal polyurethane gasbag backplate (13), the top of one side of baffle (11) is equipped with argon gas runner air outlet (9) before argon pipe runner (8) is close to the back seal polyurethane gasbag, the top of one side that prefabricated tubular product (1) and finished product tubular product (14) are close to each other is equipped with argon tungsten electrode arc welding torch (7).
2. The steel pipe back protection device for the continuous argon arc welding weld joint according to claim 1, wherein a front sealing polyurethane airbag inflation port (5) is fixedly connected to one side, close to a rear sealing polyurethane airbag (12), of the front sealing polyurethane airbag (4), and a rear sealing polyurethane airbag inflation port (10) is fixedly connected to one side, close to the front sealing polyurethane airbag inflation port (5), of the rear sealing polyurethane airbag (12).
3. The device for protecting the back of the steel pipe continuous argon arc welding weld joint according to claim 1, wherein the front baffle plate (3) of the front sealing polyurethane airbag and the rear baffle plate (6) of the front sealing polyurethane airbag are fixedly sleeved on the outer ring of the argon pipe flow passage (8).
4. The device for protecting the back of the weld joint in the continuous argon arc welding of the steel pipe as claimed in claim 1, wherein the front baffle plate (11) of the rear sealing polyurethane airbag and the rear baffle plate (13) of the rear sealing polyurethane airbag are fixedly sleeved on the outer ring of the argon pipe flow passage (8).
5. The device for protecting the back of the weld joint in the continuous argon arc welding of the steel pipe as claimed in claim 1, wherein an argon back protection gas exhaust area (15) is arranged between the front sealing polyurethane airbag (4) and the rear sealing polyurethane airbag (12).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910820874.4A CN110587081A (en) | 2019-09-02 | 2019-09-02 | Steel pipe continuous argon arc welding weld back protection device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910820874.4A CN110587081A (en) | 2019-09-02 | 2019-09-02 | Steel pipe continuous argon arc welding weld back protection device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110587081A true CN110587081A (en) | 2019-12-20 |
Family
ID=68856722
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910820874.4A Pending CN110587081A (en) | 2019-09-02 | 2019-09-02 | Steel pipe continuous argon arc welding weld back protection device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110587081A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112222576A (en) * | 2020-12-17 | 2021-01-15 | 成都裕鸢航空零部件制造有限公司 | Argon tungsten-arc welding method and welding tool capable of preventing weld joint from being oxidized |
Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2104426A (en) * | 1981-08-04 | 1983-03-09 | Anthony Bell Hick | A method of arc welding from below |
| CN201333599Y (en) * | 2009-01-22 | 2009-10-28 | 中国化学工程第三建设有限公司 | Protective gas sealing device in a pipeline welding pipe |
| CN202861606U (en) * | 2012-10-17 | 2013-04-10 | 中石化第五建设有限公司 | Inflatable plugging device in pipe used for stainless steel pipeline argon arc welding |
| CN105665888A (en) * | 2016-04-20 | 2016-06-15 | 中国十九冶集团有限公司 | Gas saving structure for pipeline argon arc welding |
| CN106944776A (en) * | 2017-05-12 | 2017-07-14 | 烟台杰瑞石油装备技术有限公司 | A kind of plugging device for welded pipe line internal protection gas |
| CN207840372U (en) * | 2017-12-05 | 2018-09-11 | 上海开山能源装备有限公司 | A kind of large-diameter pipeline welding internal argon-filling protective device |
| CN207914757U (en) * | 2018-03-06 | 2018-09-28 | 兰州兰石重型装备股份有限公司 | The local argon protective device of pipeline welding |
| CN109277729A (en) * | 2018-10-18 | 2019-01-29 | 中船澄西船舶修造有限公司 | A kind of steel-pipe welding protection gas tooling |
| CN210731328U (en) * | 2019-09-02 | 2020-06-12 | 新兴铸管股份有限公司 | Steel pipe continuous argon arc welding weld back protection device |
-
2019
- 2019-09-02 CN CN201910820874.4A patent/CN110587081A/en active Pending
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2104426A (en) * | 1981-08-04 | 1983-03-09 | Anthony Bell Hick | A method of arc welding from below |
| CN201333599Y (en) * | 2009-01-22 | 2009-10-28 | 中国化学工程第三建设有限公司 | Protective gas sealing device in a pipeline welding pipe |
| CN202861606U (en) * | 2012-10-17 | 2013-04-10 | 中石化第五建设有限公司 | Inflatable plugging device in pipe used for stainless steel pipeline argon arc welding |
| CN105665888A (en) * | 2016-04-20 | 2016-06-15 | 中国十九冶集团有限公司 | Gas saving structure for pipeline argon arc welding |
| CN106944776A (en) * | 2017-05-12 | 2017-07-14 | 烟台杰瑞石油装备技术有限公司 | A kind of plugging device for welded pipe line internal protection gas |
| CN207840372U (en) * | 2017-12-05 | 2018-09-11 | 上海开山能源装备有限公司 | A kind of large-diameter pipeline welding internal argon-filling protective device |
| CN207914757U (en) * | 2018-03-06 | 2018-09-28 | 兰州兰石重型装备股份有限公司 | The local argon protective device of pipeline welding |
| CN109277729A (en) * | 2018-10-18 | 2019-01-29 | 中船澄西船舶修造有限公司 | A kind of steel-pipe welding protection gas tooling |
| CN210731328U (en) * | 2019-09-02 | 2020-06-12 | 新兴铸管股份有限公司 | Steel pipe continuous argon arc welding weld back protection device |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112222576A (en) * | 2020-12-17 | 2021-01-15 | 成都裕鸢航空零部件制造有限公司 | Argon tungsten-arc welding method and welding tool capable of preventing weld joint from being oxidized |
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