CN112756751A - Small-bore pipe inner welding method - Google Patents
Small-bore pipe inner welding method Download PDFInfo
- Publication number
- CN112756751A CN112756751A CN202011612348.8A CN202011612348A CN112756751A CN 112756751 A CN112756751 A CN 112756751A CN 202011612348 A CN202011612348 A CN 202011612348A CN 112756751 A CN112756751 A CN 112756751A
- Authority
- CN
- China
- Prior art keywords
- tungsten electrode
- welding
- adjusting
- enable
- end plug
- 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
- 238000003466 welding Methods 0.000 title claims abstract description 88
- 238000000034 method Methods 0.000 title claims abstract description 24
- WFKWXMTUELFFGS-UHFFFAOYSA-N tungsten Chemical compound [W] WFKWXMTUELFFGS-UHFFFAOYSA-N 0.000 claims abstract description 66
- 229910052721 tungsten Inorganic materials 0.000 claims abstract description 66
- 239000010937 tungsten Substances 0.000 claims abstract description 66
- 238000005253 cladding Methods 0.000 claims description 13
- 230000001681 protective effect Effects 0.000 claims description 6
- 238000010891 electric arc Methods 0.000 abstract description 7
- 238000004519 manufacturing process Methods 0.000 abstract description 3
- 239000003758 nuclear fuel Substances 0.000 abstract description 2
- 239000007789 gas Substances 0.000 description 7
- 230000035515 penetration Effects 0.000 description 4
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 description 2
- 239000000446 fuel Substances 0.000 description 2
- 229910052786 argon Inorganic materials 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000011261 inert gas Substances 0.000 description 1
Images
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
- B23K9/02—Seam welding; Backing means; Inserts
- B23K9/028—Seam welding; Backing means; Inserts for curved planar seams
- B23K9/0282—Seam welding; Backing means; Inserts for curved planar seams for welding tube sections
- B23K9/0284—Seam welding; Backing means; Inserts for curved planar seams for welding tube sections with an electrode working inside the tube
Abstract
The invention belongs to the technical field of nuclear fuel element manufacturing, and particularly relates to a small-bore pipe inner welding method. Step one, adjusting a tungsten electrode to enable the height of the tungsten electrode from a welding seam to be 0.3-0.5 mm; adjusting the tungsten electrode to enable the axial distance between the tungsten electrode and the welding line to be 0.5-0.6 mm; and step three, welding process. And the height positioning of the tungsten electrode is realized by a touch method. The welding method of 0.5-0.6mm of axial distance between the tungsten electrode and the welding seam overcomes the difficulty of electric arc blow-off and realizes the welding in the small-aperture pipe.
Description
Technical Field
The invention belongs to the technical field of nuclear fuel element manufacturing, and particularly relates to a small-bore pipe inner welding method.
Background
In the manufacture of the annular fuel element, TIG welding is carried out at the position where the inner diameter of the cladding pipe is 8.2mm and the distance from the pipe orifice is 3 mm. The existing TIG welding of fuel rods is carried out outside a cladding tube and inside the cladding tube for the first time.
Disclosure of Invention
The invention aims to provide a method for welding a small-bore pipe. And performing TIG welding at the position which is 8.2mm away from the pipe orifice and is 3mm away from the inner diameter of the cladding pipe. The height position of the tungsten electrode and the welding seam is only the axial position of the cladding tube, but the tungsten electrode and the welding gun mechanism are arranged in the axial position of the cladding tube, so that the position of observing the height of the tungsten electrode without the welding seam is occupied, and the height of the tungsten electrode and the welding seam cannot be directly observed. The height positioning of the tungsten electrode and the welding line is realized by innovatively adopting a touch method.
In the TIG welding process, inert gas argon is needed to be used as shielding gas, the flowing direction of the shielding gas is generally parallel to a tungsten electrode, and the condition of electric arc blow cannot occur. In the welding process, the flow direction of the protective gas is vertical to the tungsten electrode, so that electric arc blow is caused, and if the axial direction of the tungsten electrode and the welding seam is 0mm, the penetration welding seam cannot be realized. And establishing a welding method with the axial distance between the tungsten electrode and the welding seam being 0.5-0.6mm, and striking an electric arc on the welding seam under the condition of electric arc blow so as to realize penetration welding seam.
In order to achieve the purpose, the technical scheme adopted by the invention is as follows:
a method for welding a small-bore pipe,
step one, adjusting a tungsten electrode to enable the height of the tungsten electrode from a welding seam to be 0.3-0.5 mm;
1. a rotary chuck is arranged on the left side of the welding line and clamps the cladding tube;
2. adjusting the welding gun mechanism to enable the tungsten electrode to axially move to the end plug end face position;
3. adjusting the welding gun mechanism to enable the tungsten electrode to move downwards;
4. in the processes of executing 2 and 3, the tungsten electrode has micro deformation, which indicates that the tungsten electrode touches the bottommost part in the end plug hole;
5. adjusting a welding gun mechanism to enable a tungsten electrode to move upwards by 0.3-0.5mm, and enabling the height of the tungsten electrode from a welding seam to be 0.3-0.5 mm;
adjusting the tungsten electrode to enable the axial distance between the tungsten electrode and the welding line to be 0.5-0.6 mm;
1. adjusting a welding gun mechanism to enable the tungsten electrode to enter the end plug hole rightwards along the axial direction;
2. adjusting a welding gun mechanism to enable the tungsten electrode to enter the end plug rightwards along the axial direction for a distance of 2.4-2.5 mm;
3. the deviation of the tungsten electrode and the welding line is 0.5-0.6 mm;
step three, welding process;
1. connecting protective gas;
2. starting a welding machine to start welding;
3. and after the welding is finished, taking out the end plug and the cladding tube.
The beneficial effects obtained by the invention are as follows:
and the height positioning of the tungsten electrode is realized by a touch method. The welding method of 0.5-0.6mm of axial distance between the tungsten electrode and the welding seam overcomes the difficulty of electric arc blow-off and realizes the welding in the small-aperture pipe. Under the condition that the distance between the tungsten electrode and the welding line cannot be observed visually, the height positioning of the tungsten electrode and the welding line is realized through a touch method. The welding method with the axial distance between the tungsten electrode and the welding seam being 0.5-0.6mm is formulated, the difficulty that the penetration welding seam cannot be realized due to electric arc blow is overcome, and the welding in the small-aperture pipe is realized.
Drawings
FIG. 1 is a schematic view of the weld in a small bore tube
FIG. 2 is a schematic view of the position of the tungsten electrode touching the end plug
In the figure, 1, an end plug, 2, a cladding tube, 3, a welding line, 4, a tungsten electrode, 5, a welding gun mechanism, 6, the tungsten electrode and the welding gun mechanism occupy the position for observing the height of the tungsten electrode without the welding line, 7, the axial deviation distance between the tungsten electrode and the welding line, 8, a rotating chuck, 9, the height between the tungsten electrode and the welding line, 10, the distance between the welding line and the end plug end face, 10, the end plug end face and 11, the flow direction of protective gas.
Detailed Description
The invention is described in detail below with reference to the figures and specific embodiments.
Step one, adjusting a tungsten electrode 4 to enable the height of the tungsten electrode from a welding seam 3 to be 0.3-0.5 mm;
1. a rotating chuck 8 is arranged on the left side of the welding line, and the rotating chuck 8 clamps the cladding tube 2;
2. adjusting a welding gun mechanism 5 to axially move the tungsten electrode 4 to the end face position of the end plug 1;
3. adjusting a welding gun mechanism 5 to enable the tungsten electrode 4 to move downwards;
4. in the processes of executing 2 and 3, the tungsten electrode 4 has micro deformation, which indicates that the tungsten electrode touches the bottommost part in the hole of the end plug 1;
5. adjusting a welding gun mechanism 5 to enable the tungsten electrode 4 to move upwards by 0.3-0.5mm, and enabling the height of the tungsten electrode 4 to be 0.3-0.5mm from a welding seam;
and step two, adjusting the tungsten electrode 4 to enable the axial distance between the tungsten electrode 4 and the welding line 3 to be 0.5-0.6 mm.
1. Adjusting a welding gun mechanism 5 to enable the tungsten electrode 4 to enter the end plug hole rightwards along the axial direction;
2. adjusting a welding gun mechanism 5 to enable the tungsten electrode 4 to enter the end plug rightwards along the axial direction by a distance of 2.4-2.5 mm;
3. the deviation of the tungsten electrode 4 and the welding seam 3 is 0.5-0.6mm, so that the difficulty that the penetration welding seam cannot be realized due to arc blow caused by the fact that the tungsten electrode 4 is perpendicular to the flow direction 11 of the protective gas is avoided;
step three, welding process
1. And protective gas is communicated.
2. Starting a welding machine to start welding;
3. and after the welding is finished, taking out the end plug and the cladding tube.
Claims (1)
1. A small-bore pipe inner welding method is characterized in that:
step one, adjusting a tungsten electrode to enable the height of the tungsten electrode from a welding seam to be 0.3-0.5 mm;
1. a rotary chuck is arranged on the left side of the welding line and clamps the cladding tube;
2. adjusting the welding gun mechanism to enable the tungsten electrode to axially move to the end plug end face position;
3. adjusting the welding gun mechanism to enable the tungsten electrode to move downwards;
4. in the processes of executing 2 and 3, the tungsten electrode has micro deformation, which indicates that the tungsten electrode touches the bottommost part in the end plug hole;
5. adjusting a welding gun mechanism to enable a tungsten electrode to move upwards by 0.3-0.5mm, and enabling the height of the tungsten electrode from a welding seam to be 0.3-0.5 mm;
adjusting the tungsten electrode to enable the axial distance between the tungsten electrode and the welding line to be 0.5-0.6 mm;
1. adjusting a welding gun mechanism to enable the tungsten electrode to enter the end plug hole rightwards along the axial direction;
2. adjusting a welding gun mechanism to enable the tungsten electrode to enter the end plug rightwards along the axial direction for a distance of 2.4-2.5 mm;
3. the deviation of the tungsten electrode and the welding line is 0.5-0.6 mm;
step three, welding process;
1. connecting protective gas;
2. starting a welding machine to start welding;
3. and after the welding is finished, taking out the end plug and the cladding tube.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011612348.8A CN112756751A (en) | 2020-12-30 | 2020-12-30 | Small-bore pipe inner welding method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011612348.8A CN112756751A (en) | 2020-12-30 | 2020-12-30 | Small-bore pipe inner welding method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112756751A true CN112756751A (en) | 2021-05-07 |
Family
ID=75697738
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011612348.8A Pending CN112756751A (en) | 2020-12-30 | 2020-12-30 | Small-bore pipe inner welding method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112756751A (en) |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH04138875A (en) * | 1990-09-28 | 1992-05-13 | Kobe Steel Ltd | Welding starting position detecting method for automatic welding equipment |
| WO2004068503A2 (en) * | 2003-01-24 | 2004-08-12 | Westinghouse Electric Company Llc | Flat weld end plug |
| CN103209800A (en) * | 2010-10-14 | 2013-07-17 | 西门子公司 | Method for controlling a spot welding system, including the determination of the position of an inserted element in a hollow member |
| CN112059465A (en) * | 2020-09-30 | 2020-12-11 | 上海电气核电设备有限公司 | Connecting structure for reactor container and welding process |
-
2020
- 2020-12-30 CN CN202011612348.8A patent/CN112756751A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH04138875A (en) * | 1990-09-28 | 1992-05-13 | Kobe Steel Ltd | Welding starting position detecting method for automatic welding equipment |
| WO2004068503A2 (en) * | 2003-01-24 | 2004-08-12 | Westinghouse Electric Company Llc | Flat weld end plug |
| CN103209800A (en) * | 2010-10-14 | 2013-07-17 | 西门子公司 | Method for controlling a spot welding system, including the determination of the position of an inserted element in a hollow member |
| CN112059465A (en) * | 2020-09-30 | 2020-12-11 | 上海电气核电设备有限公司 | Connecting structure for reactor container and welding process |
Non-Patent Citations (3)
| Title |
|---|
| 冯英超等: "TOCE自动焊电弧偏吹的问题及调整方法", 《金属加工（热加工）》 * |
| 殷树言等: "烟火管内环缝的MAG焊工艺", 《焊接》 * |
| 马丽: "浅析焊接过程中的电弧偏吹", 《职业》 * |
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| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20210507 |
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| RJ01 | Rejection of invention patent application after publication |