CN109590662B - Automatic welding device and welding method capable of adjusting circumferential seam of titanium alloy cylinder - Google Patents
Automatic welding device and welding method capable of adjusting circumferential seam of titanium alloy cylinder Download PDFInfo
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- CN109590662B CN109590662B CN201910013433.3A CN201910013433A CN109590662B CN 109590662 B CN109590662 B CN 109590662B CN 201910013433 A CN201910013433 A CN 201910013433A CN 109590662 B CN109590662 B CN 109590662B
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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
- B23K37/00—Auxiliary devices or processes, not specially adapted to a procedure covered by only one of the preceding main groups
- B23K37/04—Auxiliary devices or processes, not specially adapted to a procedure covered by only one of the preceding main groups for holding or positioning work
- B23K37/047—Auxiliary devices or processes, not specially adapted to a procedure covered by only one of the preceding main groups for holding or positioning work moving work to adjust its position between soldering, welding or cutting steps
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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
- B23K37/00—Auxiliary devices or processes, not specially adapted to a procedure covered by only one of the preceding main groups
- B23K37/003—Cooling means
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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
- B23K37/00—Auxiliary devices or processes, not specially adapted to a procedure covered by only one of the preceding main groups
- B23K37/04—Auxiliary devices or processes, not specially adapted to a procedure covered by only one of the preceding main groups for holding or positioning work
- B23K37/053—Auxiliary devices or processes, not specially adapted to a procedure covered by only one of the preceding main groups for holding or positioning work aligning cylindrical work; Clamping devices therefor
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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
- B23K9/32—Accessories
- B23K9/325—Devices for supplying or evacuating shielding gas
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- Mechanical Engineering (AREA)
- Optics & Photonics (AREA)
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- Arc Welding In General (AREA)
Abstract
The invention provides an adjustable automatic welding device and a welding method for a titanium alloy cylinder circumferential weld, which comprises an outer connecting rod, a left pressure plate, a right pressure plate, an inner connecting rod, an outer connecting rod nut, an inner connecting rod nut and a tail protection drag cover; the inner connecting rod can be inserted into the outer connecting rod, the left pressure plate can be sleeved into the outer connecting rod, the right pressure plate can be sleeved into the inner connecting rod, the outer connecting rod is in clearance fit with the inner connecting rod, and the length between the left pressure plate and the right pressure plate can be adjusted; the inner surfaces of the left pressure plate and the right pressure plate are arc surfaces and can be tightly attached to the inner surface of a product to be welded; the outer connecting rod nut compresses the left pressure plate, and the inner connecting rod nut compresses the right pressure plate; the tail protection dragging cover is connected to a welding gun nozzle and is driven by a welding gun to realize protection. The invention adjusts the length of the inner connecting rod inserted into the outer connecting rod and the total length of the device through the clearance fit of the outer connecting rod and the inner connecting rod, so that the device has wide adaptability suitable for welding of cylinders with different lengths, has simple structure, safely and reliably completes the welding of the circumferential seam of the titanium alloy cylinder structure and avoids the oxidation near the welding seam, thereby ensuring the welding quality of the circumferential seam of the titanium alloy cylinder.
Description
Technical Field
The invention relates to the field of machine manufacturing, in particular to an automatic welding device and method capable of adjusting a circumferential seam of a titanium alloy cylinder.
Background
At present, titanium alloy structures are more and more widely used in the field of aerospace. The titanium alloy cylinder is used as a structure form for large-scale use and mainly comprises a front end frame, a rear end frame and a skin roll, wherein the front end frame, the skin roll and the rear end frame need to be subjected to girth welding. Because titanium alloy is easy to oxidize at high temperature and manual welding is difficult to install the dragging cover, an automatic welding method is needed. The length of the titanium alloy girth welding tool used at present is fixed, so that only products with specific lengths can be welded, and once the length of the products is changed, the original tool cannot be used.
Disclosure of Invention
Aiming at the defects in the prior art, the invention aims to provide an automatic welding device and a welding method for adjusting the circumferential seam of a titanium alloy cylinder.
The automatic welding device with the adjustable circumferential seam of the titanium alloy cylinder body comprises an outer connecting rod, a left pressing plate, a right pressing plate, an inner connecting rod, an outer connecting rod nut, an inner connecting rod nut and a tail protection drag cover;
the inner connecting rod can be inserted into the outer connecting rod, the left pressure plate can be sleeved into the outer connecting rod, the right pressure plate can be sleeved into the inner connecting rod, the outer connecting rod is in clearance fit with the inner connecting rod, and the length between the left pressure plate and the right pressure plate can be adjusted so as to adjust the total length of the welding device;
the inner surfaces of the left pressure plate and the right pressure plate are arc surfaces and can be tightly attached to the inner surface of a product to be welded;
the outer connecting rod nut compresses the left pressure plate, and the inner connecting rod nut compresses the right pressure plate;
the tail protection dragging cover is connected to a welding gun nozzle and is driven by a welding gun to realize protection.
Preferably, the outer connecting rod and the inner connecting rod are respectively and uniformly provided with an outer connecting rod positioning hole and an inner connecting rod positioning hole;
the outer connecting rod positioning hole and the inner connecting rod positioning hole can be overlapped, and a bolt can be installed for positioning after the outer connecting rod positioning hole and the inner connecting rod positioning hole are overlapped.
Preferably, the left side of the outer connecting rod is provided with an air inlet pipe orifice, and the air inlet pipe orifice is connected with external inert protective gas and can be used for circulating protective gas.
Preferably, the right side of the inner connecting rod is provided with an air outlet which is communicated with the outside and can discharge the protective gas.
Preferably, the outer connecting rod and the inner connecting rod are respectively provided with an outer connecting rod vent hole and an inner connecting rod vent hole, the outer connecting rod vent hole is communicated with the end part of the outer connecting rod, and the inner connecting rod vent hole is communicated with the end part of the inner connecting rod.
According to the invention, the welding method using the welding device comprises the following steps:
inserting the inner connecting rod into the outer connecting rod by a proper length according to the total length of a product to be welded, and fixing the inner connecting rod and the outer connecting rod;
sleeving the right pressure plate on the inner connecting rod, and then screwing the nut of the inner connecting rod to enable the nut of the inner connecting rod to tightly press the right pressure plate;
the rear end frame of the product to be welded is arranged on the right platen;
a left pressure plate is arranged on the front end frame of a product to be welded, and an outer connecting rod nut is screwed tightly;
enabling a product to be welded to be in a vertical state, enabling a front end frame to be located at the lower part, connecting protective gas into an end part interface of the outer connecting rod, and introducing the protective gas;
and clamping the product to be welded on rotating equipment, carrying out tail protection on the cooling welding line through argon output by the tail protection cover, and automatically welding by using a welding gun.
Preferably, the welding method further comprises the following steps:
before welding, performing acid pickling and oil removal on the surface of a product to be welded, wherein the acid pickling solution is a mixed solution of 4-6% of hydrofluoric acid, 15-25% of nitric acid and the balance of water; the areas to be welded of the product to be welded are wiped with acetone.
Preferably, the welding method further comprises the following steps:
before welding, inert shielding gas is filled in a cylinder of a product to be welded, the gas filling flow is 10-15L/min, and the gas filling time is 8-10 min.
Preferably, an automatic argon tungsten-arc welding mode is adopted for welding, no wire is filled, and argon with purity of 99.998% is selected as a welding gun and protective gas on the back and the tail of a weldment.
Preferably, the welding current I ranges from 70 to 90A; the welding speed ranges from 240 mm/min to 280 mm/min; the arc length L of the electric arc ranges from 1.0 mm to 1.2 mm; the flow range of the welding gun protective gas is 15-20L/min, the flow range of the back protective gas is 5-10L/min, and the flow range of the tail protective gas is 10-15L/min.
Compared with the prior art, the invention has the following beneficial effects:
the invention adjusts the length of the inner connecting rod inserted into the outer connecting rod and the total length of the device through the clearance fit of the outer connecting rod and the inner connecting rod, so that the device has wide adaptability suitable for welding of cylinders with different lengths, has simple structure, safely and reliably completes the welding of the circumferential seam of the titanium alloy cylinder structure and avoids the oxidation near the welding seam, thereby ensuring the welding quality of the circumferential seam of the titanium alloy cylinder.
Drawings
Other features, objects and advantages of the invention will become more apparent upon reading of the detailed description of non-limiting embodiments with reference to the following drawings:
FIG. 1 is a schematic diagram of the apparatus of the present invention;
FIG. 2 is a schematic view of the working state of the apparatus of the present invention.
The figures show that:
Detailed Description
The present invention will be described in detail with reference to specific examples. The following examples will assist those skilled in the art in further understanding the invention, but are not intended to limit the invention in any way. It should be noted that it would be obvious to those skilled in the art that various changes and modifications can be made without departing from the spirit of the invention. All falling within the scope of the present invention.
The invention provides an automatic welding device and a welding method capable of adjusting the circumferential seam of a titanium alloy cylinder, which meet the requirements of circumferential seam welding of titanium alloy cylinders with different length specifications, provide effective protection for the automatic welding process, and avoid the oxidation of a welding joint, thereby ensuring the welding quality of the circumferential seam of the titanium alloy cylinder.
The automatic welding device with the adjustable circumferential weld of the titanium alloy cylinder provided by the invention comprises an outer connecting rod 1, a left pressure plate 2, a right pressure plate 3, an inner connecting rod 4, an outer connecting rod nut 5, an inner connecting rod nut 6 and a tail protection drag cover 7;
the inner connecting rod 4 can be inserted into the outer connecting rod 1, the left pressure plate 2 can be sleeved into the outer connecting rod 1, the right pressure plate 3 can be sleeved into the inner connecting rod 4, the outer connecting rod 1 is in clearance fit with the inner connecting rod 4, and the length between the left pressure plate 2 and the right pressure plate 3 can be adjusted so as to adjust the total length of the welding device;
the inner surfaces of the left pressure plate 2 and the right pressure plate 3 are arc surfaces and can be tightly attached to the inner surface of a product to be welded;
the outer connecting rod nut 5 compresses the left pressure plate 2, and the inner connecting rod nut 6 compresses the right pressure plate 3;
the tail protection dragging cover 7 is connected to a welding gun nozzle and is driven by a welding gun to realize protection.
Preferably, the outer connecting rod 1 and the inner connecting rod 4 are respectively and uniformly provided with an outer connecting rod positioning hole 10 and an inner connecting rod positioning hole 40;
the outer connecting rod positioning hole 10 and the inner connecting rod positioning hole 40 can be overlapped, and a bolt can be installed for positioning after the outer connecting rod positioning hole 10 and the inner connecting rod positioning hole 40 are overlapped.
Specifically, the left side of the outer connecting rod 1 is provided with an air inlet pipe orifice 11, and the air inlet pipe orifice 11 can be connected with external inert protective gas and can flow through the protective gas.
Specifically, the right side of the inner link 4 is provided with an air outlet 41, and the air outlet 41 is communicated with the outside and can discharge shielding gas.
Specifically, the outer link 1 and the inner link 4 are respectively provided with an outer link vent hole 12 and an inner link vent hole 42, the outer link vent hole 12 is communicated with the end of the outer link 1, and the inner link vent hole 42 is communicated with the end of the inner link 4.
According to the invention, the welding method using the welding device comprises the following steps:
inserting the inner connecting rod 4 into the outer connecting rod 1 by a proper length according to the total length of a product to be welded, and fixing the inner connecting rod 4 and the outer connecting rod 1;
sleeving the right pressure plate 3 on the inner connecting rod 4, and then installing and screwing the inner connecting rod nut 6 to enable the inner connecting rod nut 6 to tightly press the right pressure plate 3;
the rear end frame of the product to be welded is arranged on the right platen 3;
a left pressure plate 2 is arranged on the front end frame of a product to be welded, and an outer connecting rod nut 5 is screwed tightly;
enabling a product to be welded to be in a vertical state, enabling a front end frame to be arranged below, connecting a protection to an end interface of the outer connecting rod, and introducing protection gas;
and clamping a product to be welded on a rotating device, performing tail protection on the cooling welding line through argon output by the tail protection cover 7, and automatically welding by using a welding gun.
Specifically, the welding method further comprises the following steps:
before welding, performing acid pickling and oil removal on the surface of a product to be welded, wherein the acid pickling solution is a mixed solution of 4-6% of hydrofluoric acid, 15-25% of nitric acid and the balance of water; the areas to be welded of the product to be welded are wiped with acetone.
Specifically, the welding method further comprises the following steps:
before welding, inert shielding gas is filled in a cylinder of a product to be welded, the gas filling flow is 10-15L/min, and the gas filling time is 8-10 min.
Specifically, an automatic argon tungsten-arc welding mode is adopted for welding, no wire is filled, and argon with purity of 99.998% is selected as a welding gun and shielding gas on the back and the tail of a weldment.
Specifically, the range of the welding current I is 70-90A; the welding speed ranges from 240 mm/min to 280 mm/min; the arc length L of the electric arc ranges from 1.0 mm to 1.2 mm; the flow range of the welding gun protective gas is 15-20L/min, the flow range of the back protective gas is 5-10L/min, and the flow range of the tail protective gas is 10-15L/min.
Preferred embodiments of the present invention will be further described with reference to the accompanying drawings.
As shown in fig. 1, the welding apparatus of the present invention includes: the device comprises an outer connecting rod 1, a left pressure plate 2, a right pressure plate 3, an inner connecting rod 4, an outer connecting rod nut 5, an inner connecting rod nut 6 and a tail protection drag cover 7. The outer connecting rod 1 is in clearance fit with the inner connecting rod 2 and is used for adjusting the total length of the device; the inner surfaces of the left pressure plate 3 and the right pressure plate 4 are arc surfaces, so that the inner surfaces of the left pressure plate and the right pressure plate are tightly attached to the inner surface of a product; the outer connecting rod nut 5 plays a role in compressing the left pressure plate 2; the inner connecting rod nut 4 plays a role in compressing the right pressure plate 3; the tail protection drag cover 7 is arc-shaped, can be tightly attached to a product, and improves the protection effect. Preferably, the outer connecting rod and the inner connecting rod are in clearance fit, and positioning holes are uniformly distributed in the outer connecting rod and the inner connecting rod, so that the length and the size can be adjusted, and the outer connecting rod and the inner connecting rod can be fixedly connected through positioning pins; the left side of the outer connecting rod 1 is provided with an air inlet pipe orifice 11 with the outer diameter phi of 8mm, and the air inlet pipe orifice is used for inputting protective gas for the device to serve as circular seam back protection; an air outlet with the inner diameter phi of 12mm is arranged on the right side of the inner connecting rod 2, so that the discharge of protective gas can be realized, and the phenomenon that the protective gas is gathered in the device to form air pressure to cause the perforation of a molten pool is avoided; the left pressure plate 2 and the right pressure plate 3 are respectively assembled with the front end frame and the rear end frame and matched with the outer connecting rod nut and the inner connecting rod nut, so that a product is fixed on the welding device and rotates along with the device in the welding process.
In a specific welding method, firstly, an inner connecting rod is inserted into an outer connecting rod by a proper length according to the total length of a product to be welded, and the inner connecting rod and the outer connecting rod are fixed through a positioning pin; sleeving the right pressure plate on the inner connecting rod, and then screwing the nut of the inner connecting rod to tightly press the right pressure plate; the rear end frame of the product after positioning welding is arranged on a right pressure plate; a left pressure plate is arranged on the front end frame, and an outer connecting rod nut is screwed tightly; enabling the product to be in a vertical state, enabling the front end frame to be under, connecting protective gas into an end interface of the outer connecting rod, and introducing the protective gas; and (4) clamping the product on special rotating equipment, carrying out tail protection on the cooling welding line through argon output by the tail protection cover, and automatically welding by using a welding gun. Before welding, carrying out acid pickling and oil removal on the surface of a workpiece to be welded, wherein a pickling solution is a mixed solution of 4-6% of hydrofluoric acid, 15-25% of nitric acid and the balance of water; wiping the area to be welded of the workpiece by using acetone; filling inert protective gas into the cylinder, wherein the gas filling flow is 10-15L/min, and the gas filling time is 8-10 min; welding by adopting an automatic argon tungsten-arc welding mode without wire filling, and selecting argon with purity of 99.998 percent as a welding gun and protective gas at the back and tail of a weldment; the range of the welding current I is 70-90A; the welding speed ranges from 240 mm/min to 280 mm/min; the arc length L of the electric arc ranges from 1.0 mm to 1.2 mm; the flow range of the welding gun protective gas is 15-20L/min, the flow range of the back protective gas is 5-10L/min, and the flow range of the tail protective gas is 10-15L/min.
In the description of the present application, it is to be understood that the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience in describing the present application and simplifying the description, but do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present application.
The foregoing description of specific embodiments of the present invention has been presented. It is to be understood that the present invention is not limited to the specific embodiments described above, and that various changes or modifications may be made by one skilled in the art within the scope of the appended claims without departing from the spirit of the invention. The embodiments and features of the embodiments of the present application may be combined with each other arbitrarily without conflict.
Claims (6)
1. An adjustable automatic welding device for a titanium alloy cylinder circumferential weld is characterized by comprising an outer connecting rod (1), a left pressure plate (2), a right pressure plate (3), an inner connecting rod (4), an outer connecting rod nut (5), an inner connecting rod nut (6) and a tail protection drag cover (7);
the inner connecting rod (4) can be inserted into the outer connecting rod (1), the left pressure plate (2) can be sleeved into the outer connecting rod (1), the right pressure plate (3) can be sleeved into the inner connecting rod (4), the outer connecting rod (1) is in clearance fit with the inner connecting rod (4), and the length between the left pressure plate (2) and the right pressure plate (3) can be adjusted;
the inner surfaces of the left pressure plate (2) and the right pressure plate (3) are arc surfaces and can be tightly attached to the inner surface of a product to be welded;
the outer connecting rod nut (5) compresses the left pressure plate (2), and the inner connecting rod nut (6) compresses the right pressure plate (3);
the tail protective dragging cover (7) is connected to a welding gun nozzle and is driven by a welding gun to realize protection;
the outer connecting rod (1) and the inner connecting rod (4) are respectively and uniformly provided with an outer connecting rod positioning hole (10) and an inner connecting rod positioning hole (40);
the outer connecting rod positioning hole (10) and the inner connecting rod positioning hole (40) can be overlapped, and a bolt can be installed for positioning after the outer connecting rod positioning hole (10) and the inner connecting rod positioning hole (40) are overlapped;
the outer connecting rod (1) and the inner connecting rod (4) are respectively provided with an outer connecting rod vent hole (12) and an inner connecting rod vent hole (42), the outer connecting rod vent hole (12) is communicated with the end part of the outer connecting rod (1), and the inner connecting rod vent hole (42) is communicated with the end part of the inner connecting rod (4).
2. The automatic welding device with the adjustable circumferential seam of the titanium alloy cylinder body as claimed in claim 1, characterized in that a gas inlet pipe orifice (11) is arranged on the left side of the outer connecting rod (1), and the gas inlet pipe orifice (11) can be connected with external inert shielding gas to circulate the shielding gas.
3. The automatic welding device with the adjustable titanium alloy cylinder circumferential weld of claim 1, characterized in that an air outlet (41) is formed in the right side of the inner connecting rod (4), and the air outlet (41) is communicated with the outside and can discharge shielding gas.
4. A welding method of a welding apparatus as set forth in any one of claims 1 to 3, comprising the steps of:
according to the total length of a product to be welded, inserting the inner connecting rod (4) into the outer connecting rod (1) by a proper length, and fixing the inner connecting rod (4) and the outer connecting rod (1);
sleeving the right pressure plate (3) on the inner connecting rod (4), and then installing and screwing the inner connecting rod nut (6) to enable the inner connecting rod nut (6) to tightly press the right pressure plate (3);
the rear end frame of the product to be welded is arranged on the right platen (3);
a left pressure plate (2) is arranged on the front end frame of a product to be welded, and an outer connecting rod nut (5) is screwed;
enabling a product to be welded to be in a vertical state, enabling a front end frame to be located at the lower part, connecting protective gas into an end part interface of the outer connecting rod, and introducing the protective gas;
clamping a product to be welded on a rotating device, performing tail protection at a cooling welding seam through argon output by a tail protection cover (7), and performing automatic welding by a welding gun; before welding, performing acid pickling and oil removal on the surface of a product to be welded, wherein the acid pickling solution is a mixed solution of 4-6% of hydrofluoric acid, 15-25% of nitric acid and the balance of water; wiping a to-be-welded area of a to-be-welded product by using acetone;
before welding, inert shielding gas is filled in a cylinder of a product to be welded, the gas filling flow is 10-15L/min, and the gas filling time is 8-10 min.
5. The welding method of claim 4, wherein the welding is performed by automatic argon tungsten-arc welding without wire filling, and argon gas with purity of 99.998% is selected as the shielding gas for the welding gun and the back and the tail of the weldment.
6. Welding method according to claim 4, wherein the welding current I is in the range of 70-90A; the welding speed ranges from 240 mm/min to 280 mm/min; the arc length L of the electric arc ranges from 1.0 mm to 1.2 mm; the flow range of the welding gun protective gas is 15-20L/min, the flow range of the back protective gas is 5-10L/min, and the flow range of the tail protective gas is 10-15L/min.
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| CN201910013433.3A CN109590662B (en) | 2019-01-07 | 2019-01-07 | Automatic welding device and welding method capable of adjusting circumferential seam of titanium alloy cylinder |
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| CN201910013433.3A CN109590662B (en) | 2019-01-07 | 2019-01-07 | Automatic welding device and welding method capable of adjusting circumferential seam of titanium alloy cylinder |
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| CN111822824A (en) * | 2020-07-13 | 2020-10-27 | 陈树强 | Circular seam welding process |
| CN112222743B (en) * | 2020-09-28 | 2021-06-15 | 北京新风航天装备有限公司 | Welding protection device for end joint of thin-wall pipeline |
| CN112192152A (en) * | 2020-09-29 | 2021-01-08 | 中国航发动力股份有限公司 | Annular curved surface titanium alloy workpiece and welding method thereof |
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| CN104159702A (en) * | 2012-03-07 | 2014-11-19 | 朴晋盱 | Purging device for pipe welding |
| EP2905107A1 (en) * | 2014-02-11 | 2015-08-12 | Rolls-Royce plc | Fixture |
| CN103978340A (en) * | 2014-05-12 | 2014-08-13 | 西北工业大学 | Girth welding device and girth welding method for aircraft pipeline component |
| CN104148868A (en) * | 2014-08-01 | 2014-11-19 | 成都艾格科技有限责任公司 | Internal supporting and external hooping non-fixing-and-spot-welding girth welder applicable to one-side welding with back formation |
| CN104646795A (en) * | 2015-02-06 | 2015-05-27 | 中国运载火箭技术研究院 | Welding method for sealing girth of storage tank with diameter of 5M, weak rigidity and small-diameter manhole |
| CN106031960A (en) * | 2015-03-13 | 2016-10-19 | 哈尔滨飞机工业集团有限责任公司 | Inner surface gas protection device used when welding circular tube |
| CN205414832U (en) * | 2016-03-25 | 2016-08-03 | 上海普睿玛智能科技有限公司 | Pipe welding is with rhombus internal stay anchor clamps |
| CN106736084A (en) * | 2017-01-04 | 2017-05-31 | 蚌埠通达汽车零部件有限公司 | A kind of automobile-used air reservoir automatic circumferential sewing welder |
| CN208195277U (en) * | 2018-03-29 | 2018-12-07 | 上海锅炉厂有限公司 | A kind of inner support annulus corrected and prevent barrel distortion |
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