CN111098008A - Method for protecting gas on back of welding seam of corrugated pipe diaphragm - Google Patents
Method for protecting gas on back of welding seam of corrugated pipe diaphragm Download PDFInfo
- Publication number
- CN111098008A CN111098008A CN201911284390.9A CN201911284390A CN111098008A CN 111098008 A CN111098008 A CN 111098008A CN 201911284390 A CN201911284390 A CN 201911284390A CN 111098008 A CN111098008 A CN 111098008A
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- diaphragm
- gas
- weld
- pipe
- inlet pipe
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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
-
- 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
- B23K10/00—Welding or cutting by means of a plasma
- B23K10/02—Plasma welding
-
- 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
- B23K26/00—Working by laser beam, e.g. welding, cutting or boring
- B23K26/70—Auxiliary operations or equipment
- B23K26/702—Auxiliary equipment
Abstract
The invention discloses a bellows diaphragm welding seam back gas protection method, which comprises the following steps: installing a first membrane, a second membrane, a first gasket and a second gasket; welding along an inner circle welding seam of the corrugated pipe diaphragm, filling protective gas through a first gas inlet pipe in the welding process, and welding to obtain a group of diaphragm pairs; assembling N groups of membrane pairs in the excircle weld back protection tool, and pressing the excircle weld back protection tool clamp; and filling protective gas from the second gas inlet pipe, and welding along the excircle weld joint of the corrugated pipe diaphragm to obtain the corrugated pipe. The invention realizes the gas protection of the back of the welding seam of the corrugated pipe diaphragm by using reasonable design, effectively improves the forming quality of the welding seam of the diaphragm, and has simple operation and strong adaptability.
Description
Technical Field
The invention relates to the technical field of corrugated pipe welding, in particular to a method for protecting the back of a welding seam of a corrugated pipe diaphragm by using gas.
Background
The welded corrugated pipe is an elastic element commonly used in aerospace systems and is formed by welding a certain number of metal diaphragms through inner and outer circles. Welding is a key process for manufacturing the corrugated pipe, and the use performance of the corrugated pipe is directly determined by the quality of welding. In the welding process, in order to obtain excellent welding seam performance, the front side and the back side of the welding seam are generally required to be subjected to gas protection, the front side of the welding seam of the diaphragm is easy to realize gas protection, but the gas protection on the back side of the welding seam is difficult to implement.
With the application and popularization of diaphragms made of high-temperature alloy, titanium alloy and the like, the diaphragm welding of the materials needs to isolate air, so that the aim of ensuring the quality of a welding seam is fulfilled. The problem can be solved by building an integral vacuum chamber, but the method has high cost and low operation efficiency, and a more convenient and efficient welding seam back gas protection method is needed.
Disclosure of Invention
The technical problem solved by the invention is as follows: the method overcomes the defects of the prior art, provides a bellows diaphragm welding seam back gas protection method, realizes the gas protection of the bellows diaphragm welding seam back, effectively improves the diaphragm welding seam forming quality, and has simple operation and strong adaptability.
The technical solution of the invention is as follows: a method of bellows diaphragm weld backside gas shielding, comprising: placing a first membrane at the bottom of an inner circle welding seam back protection tool; adjusting the positions of the first air inlet pipe and the first air outlet pipe, and placing a first gasket and a second gasket along two sides of the first air inlet pipe and the first air outlet pipe; placing a second membrane in the inner circle welding seam back protection tool; compressing the inner circle welding seam back protection tool clamp; the first air inlet pipe is positioned in a butt joint gap between one ends of the first gasket and the second gasket, and the first air outlet pipe is positioned in a butt joint gap between the other ends of the first gasket and the second gasket;
filling protective gas from the first gas inlet pipe, and removing air at the back of the inner circle welding seam of the corrugated pipe diaphragm so as to realize back protection of the inner circle welding seam of the corrugated pipe diaphragm;
welding along the inner circle welding seam of the corrugated pipe diaphragm to obtain a group of diaphragm pairs;
assembling N groups of membrane pairs in the excircle weld back protection tool, and pressing the excircle weld back protection tool clamp;
respectively communicating a second air inlet pipe and a second air outlet pipe with an inner cavity formed by the N groups of membrane pairs and the excircle weld joint back protection tool;
filling protective gas from the second gas inlet pipe, and removing air on the back of the excircle weld joint of the corrugated pipe diaphragm so as to realize back protection of the excircle weld joint of the corrugated pipe diaphragm;
and welding along the excircle weld of the corrugated pipe diaphragm to obtain the corrugated pipe.
Optionally, the bellows diaphragm inner circular weld is: and welding seams to be welded among the first membrane, the second membrane, the first gasket and the second gasket.
Optionally, the bellows diaphragm outer circumferential weld is: and adjacent diaphragms are assembled together to form a to-be-welded seam.
Optionally, the protective gas is an inert gas or a reducing gas.
Alternatively,
one end of the first air inlet pipe is positioned in the butt joint gap of one end of the first gasket and one end of the second gasket, and the other end of the first air inlet pipe is connected with the first external air delivery pipe; the other end of the first air inlet pipe, which is connected with the first external air delivery pipe, adopts a bearing structure air vent so as to ensure that the first air inlet pipe and the first external air delivery pipe are relatively static;
one end of the second air inlet pipe is positioned in the N groups of membrane pairs and communicated with an inner cavity formed by the excircle weld joint back protection tool, and the other end of the second air inlet pipe is connected with a second external air delivery pipe; and the other end of the second air inlet pipe is connected with the second outer air conveying pipe through a bearing structure air vent so as to ensure that the second air inlet pipe and the second outer air conveying pipe are relatively static.
Optionally, N groups of diaphragm pairs are assembled in the excircle welding seam back protection tool, and a gap between the diaphragm pair and the excircle welding seam back protection tool is used for ensuring that all excircle welding seams can be protected by gas.
Optionally, the first air inlet pipe, the first air outlet pipe, the second air inlet pipe and the second air outlet pipe are all plastic hoses.
Alternatively, the shielding gas is 99.99% argon and the gas flow is 5L/min.
Optionally, a spacer is used for support of the back space of the membrane.
Optionally, the value range of N is 10 to 100.
Compared with the prior art, the invention has the advantages that:
(1) the invention can realize the gas protection of the back of the welding seam of the membranes made of various materials and cover the welding seams of the inner circle and the outer circle of the membranes.
(2) The invention adopts the modes of continuous ventilation and covering protection, and can be suitable for various welding methods, such as argon tungsten-arc welding, plasma arc welding, laser welding and the like.
(3) The invention has simple operation, strong adaptability and high efficiency.
Drawings
FIG. 1 is a schematic view of the assembly of a set of membrane pairs according to the present invention;
FIG. 2 is a top view of FIG. 1;
fig. 3 is a schematic view of the assembly of N sets of membrane pairs according to the present invention.
Detailed Description
Referring to fig. 1 to 3, in this embodiment, the method for shielding gas at the back of the bellows diaphragm weld includes the following steps:
s1, placing the first membrane 1 at the bottom of the inner circle welding seam back protection tool; adjusting the positions of a first air inlet pipe 5 and a first air outlet pipe 6, and placing a first gasket 3 and a second gasket 4 along two sides of the first air inlet pipe 5 and the first air outlet pipe 6; placing a second membrane 2 in the inner circle welding seam back protection tool; and (5) compressing the inner circle welding seam back protection tool clamp.
The first air inlet pipe 5 is located in a butt joint gap between one ends of the first gasket 3 and the second gasket 4, and the first air outlet pipe 6 is located in a butt joint gap between the other ends of the first gasket 3 and the second gasket 4. Preferably, the spacer is used primarily for support of the back space of the membrane.
And S2, filling protective gas from the first gas inlet pipe 5, and removing air at the back of the circular welding seam of the corrugated pipe diaphragm so as to realize back protection of the circular welding seam of the corrugated pipe diaphragm.
As shown in fig. 1, the inner circular weld of the bellows diaphragm is: and welding seams 7 to be welded among the first membrane 1, the second membrane 2, the first gasket 3 and the second gasket 4 are aligned.
And S3, welding along the inner circle welding line of the corrugated pipe diaphragm to obtain a group of diaphragm pairs 8.
S4, assembling N groups of diaphragm pairs 8 in the excircle welding seam back protection tool, and pressing the excircle welding seam back protection tool clamp.
Preferably, the number of membrane pairs can be selected according to the actual situation, and the general value range is as follows: 10 to 100.
And S5, respectively communicating the second air inlet pipe 9 and the second air outlet pipe 10 with an inner cavity formed by the N groups of diaphragm pairs 8 and the excircle weld back protection tool.
And S6, filling protective gas from the second gas inlet pipe 9, and removing air on the back of the excircle weld joint of the corrugated pipe diaphragm so as to realize back protection of the excircle weld joint of the corrugated pipe diaphragm.
As shown in fig. 3, the weld at the outer circle of the bellows diaphragm is: adjacent pairs of diaphragms are assembled together to form a weld 11 to be welded. N groups of diaphragm pairs 8 are assembled in the excircle welding seam back protection tool, and the clearance between the diaphragm pairs and the excircle welding seam back protection tool is utilized to ensure that all excircle welding seams can be protected by gas.
And S7, welding along the excircle welding line of the corrugated pipe diaphragm to obtain the corrugated pipe.
Preferably, one end of the first air inlet pipe 5 is positioned in a butt joint gap between one ends of the first gasket 3 and the second gasket 4, and the other end of the first air inlet pipe is connected with a first external air conveying pipe; wherein, the other end that first intake pipe 5 and first outside gas-supply pipe are connected adopts bearing structure blow vent to guarantee with the relative still of first outside gas-supply pipe. One end of a second air inlet pipe 9 is positioned in an inner cavity formed by the N groups of membrane pairs 8 and the excircle weld back protection tool and is communicated with the inner cavity, and the other end of the second air inlet pipe is connected with a second external air delivery pipe; wherein, the second air inlet pipe 9 is connected with the other end bearing structure vent of the second outer air delivery pipe to ensure the relative stillness with the second outer air delivery pipe.
Preferably, the protective gas is generally an inert gas or a reducing gas. For example: the protective gas was 99.99% argon, and the gas flow was 5L/min.
Preferably, the first air inlet pipe 5, the first air outlet pipe 6, the second air inlet pipe 9 and the second air outlet pipe 10 are all plastic hoses.
Those skilled in the art will appreciate that those matters not described in detail in the present specification are well known in the art.
Claims (10)
1. A method for back gas shielding of a bellows diaphragm weld, comprising:
placing a first membrane (1) at the bottom of an inner circle welding seam back protection tool; adjusting the positions of a first air inlet pipe (5) and a first air outlet pipe (6), and placing a first gasket (3) and a second gasket (4) along two sides of the first air inlet pipe (5) and the first air outlet pipe (6); placing a second membrane (2) in the inner circle welding seam back protection tool; compressing the inner circle welding seam back protection tool clamp; the first air inlet pipe (5) is positioned in a butt joint gap between one ends of the first gasket (3) and the second gasket (4), and the first air outlet pipe (6) is positioned in a butt joint gap between the other ends of the first gasket (3) and the second gasket (4);
protective gas is filled in the first air inlet pipe (5), and air on the back of the inner circle welding seam of the corrugated pipe diaphragm is removed, so that the back of the inner circle welding seam of the corrugated pipe diaphragm is protected;
welding along the inner circle welding line of the corrugated pipe diaphragm to obtain a group of diaphragm pairs (8);
assembling N groups of diaphragm pairs (8) in the excircle weld back protection tool, and pressing the excircle weld back protection tool clamp;
a second air inlet pipe (9) and a second air outlet pipe (10) are respectively communicated with an inner cavity formed by the N groups of diaphragm pairs (8) and the excircle weld back protection tool;
protective gas is filled in the second air inlet pipe (9), and air on the back of the excircle weld joint of the corrugated pipe diaphragm is removed, so that the back of the excircle weld joint of the corrugated pipe diaphragm is protected;
and welding along the excircle weld of the corrugated pipe diaphragm to obtain the corrugated pipe.
2. The method of bellows diaphragm weld back gas shield according to claim 1, wherein the bellows diaphragm inner circular weld is: and welding seams (7) to be welded among the first membrane (1), the second membrane (2), the first gasket (3) and the second gasket (4).
3. The method for backside gas shielding of a bellows diaphragm weld of claim 1, wherein the bellows diaphragm outer circumferential weld is: and adjacent diaphragm pairs are assembled together to form a to-be-welded seam (11).
4. The method for backside gas shielding of bellows membrane weld of claim 1, wherein the shielding gas is an inert gas or a reducing gas.
5. A method of bellows diaphragm weld back gas shielding according to claim 1,
one end of the first air inlet pipe (5) is positioned in a butt joint gap between one ends of the first gasket (3) and the second gasket (4), and the other end of the first air inlet pipe is connected with a first external air conveying pipe; the other end of the first air inlet pipe (5) connected with the first external air delivery pipe adopts a bearing structure air vent to ensure that the first air inlet pipe and the first external air delivery pipe are relatively static;
one end of a second air inlet pipe (9) is positioned in the inner cavity formed by the N groups of membrane pairs (8) and the excircle weld joint back protection tool and is communicated with the inner cavity, and the other end of the second air inlet pipe is connected with a second outer air delivery pipe; wherein, the second air inlet pipe (9) is connected with the other end bearing structure vent of the second outer air delivery pipe to ensure the relative rest of the second outer air delivery pipe.
6. The bellows diaphragm weld back gas protection method according to claim 1, characterized in that N sets of diaphragm pairs (8) are assembled in the outer circular weld back protection tool, and a gap between the diaphragm pairs and the outer circular weld back protection tool is utilized to ensure that all outer circular welds can be gas protected.
7. The method for gas protection at the back of a corrugated pipe diaphragm welding seam according to claim 1, characterized in that the first gas inlet pipe (5), the first gas outlet pipe (6), the second gas inlet pipe (9) and the second gas outlet pipe (10) are all plastic hoses.
8. The method for back gas shielding of bellows diaphragm weld according to claim 1 or 4, characterized in that the shielding gas is 99.99% argon and the gas flow is 5L/min.
9. The bellows diaphragm weld back gas shield method of claim 1, wherein a gasket is used for support of the diaphragm back volume.
10. The method for gas protection of the back of the welding seam of the corrugated pipe diaphragm as claimed in claim 1, wherein the value of N is in the range of 10-100.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911284390.9A CN111098008B (en) | 2019-12-13 | 2019-12-13 | Method for protecting gas on back of welding seam of corrugated pipe diaphragm |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911284390.9A CN111098008B (en) | 2019-12-13 | 2019-12-13 | Method for protecting gas on back of welding seam of corrugated pipe diaphragm |
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| CN111098008A true CN111098008A (en) | 2020-05-05 |
| CN111098008B CN111098008B (en) | 2021-12-07 |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113634892A (en) * | 2021-08-13 | 2021-11-12 | 南京晨光集团有限责任公司 | Laser welding device and method for thin-wall corrugated diaphragm for aerospace diaphragm box |
| CN114248047A (en) * | 2021-12-03 | 2022-03-29 | 渤海造船厂集团有限公司 | Flexible continuous clean welding back gas protection device |
| CN114986130A (en) * | 2022-05-23 | 2022-09-02 | 上海电气核电设备有限公司 | Back gas protection method for butt welding of thin-walled tube and large-chamber container tube joint |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113634892A (en) * | 2021-08-13 | 2021-11-12 | 南京晨光集团有限责任公司 | Laser welding device and method for thin-wall corrugated diaphragm for aerospace diaphragm box |
| CN113634892B (en) * | 2021-08-13 | 2023-09-26 | 南京晨光集团有限责任公司 | Laser welding device and method for thin-wall corrugated membrane for aerospace capsule |
| CN114248047A (en) * | 2021-12-03 | 2022-03-29 | 渤海造船厂集团有限公司 | Flexible continuous clean welding back gas protection device |
| CN114986130A (en) * | 2022-05-23 | 2022-09-02 | 上海电气核电设备有限公司 | Back gas protection method for butt welding of thin-walled tube and large-chamber container tube joint |
| CN114986130B (en) * | 2022-05-23 | 2024-02-02 | 上海电气核电设备有限公司 | Back gas protection method for butt welding of thin-wall pipe and large-cavity container pipe joint |
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