CN1075757C - Resistance plugging spot welding of vacuum pumping port with internal pressure container - Google Patents
Resistance plugging spot welding of vacuum pumping port with internal pressure container Download PDFInfo
- Publication number
- CN1075757C CN1075757C CN97116094A CN97116094A CN1075757C CN 1075757 C CN1075757 C CN 1075757C CN 97116094 A CN97116094 A CN 97116094A CN 97116094 A CN97116094 A CN 97116094A CN 1075757 C CN1075757 C CN 1075757C
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- China
- Prior art keywords
- spot welding
- welding
- internal pressure
- vacuum pumping
- pumping port
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- 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.)
- Expired - Fee Related
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- 238000003466 welding Methods 0.000 title claims abstract description 32
- 238000005086 pumping Methods 0.000 title claims description 8
- 238000000034 method Methods 0.000 claims abstract description 17
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 9
- 229910052734 helium Inorganic materials 0.000 claims abstract description 9
- 239000001307 helium Substances 0.000 claims abstract description 9
- SWQJXJOGLNCZEY-UHFFFAOYSA-N helium atom Chemical compound [He] SWQJXJOGLNCZEY-UHFFFAOYSA-N 0.000 claims abstract description 9
- 239000010959 steel Substances 0.000 claims abstract description 9
- 229920005479 Lucite® Polymers 0.000 claims description 2
- 229910000963 austenitic stainless steel Inorganic materials 0.000 claims description 2
- 239000004926 polymethyl methacrylate Substances 0.000 claims description 2
- 229910052793 cadmium Inorganic materials 0.000 abstract description 11
- BDOSMKKIYDKNTQ-UHFFFAOYSA-N cadmium atom Chemical compound [Cd] BDOSMKKIYDKNTQ-UHFFFAOYSA-N 0.000 abstract description 11
- 229910001220 stainless steel Inorganic materials 0.000 abstract description 6
- 239000010935 stainless steel Substances 0.000 abstract description 6
- 238000004519 manufacturing process Methods 0.000 abstract description 3
- 238000007789 sealing Methods 0.000 abstract 3
- 238000005242 forging Methods 0.000 abstract 1
- 229910000679 solder Inorganic materials 0.000 description 4
- 229910001566 austenite Inorganic materials 0.000 description 1
- 230000004927 fusion Effects 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 239000011229 interlayer Substances 0.000 description 1
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
Images
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- Butt Welding And Welding Of Specific Article (AREA)
- Pressure Welding/Diffusion-Bonding (AREA)
Abstract
本发明公开了一种关于带内压力容器的真空抽口的封堵电阻点焊方法。本法采用SO426型点焊机及专用工艺装备将封堵用不锈钢球放置在抽口上，通过二次电阻点焊可获得良好的点焊接头。首先，对内压力容器内腔抽真空，充氦，形成0.103MPa的内压力，用电极施加预紧力焊接；然后，立即施加顶锻力0.2-0.3MPa，并按相同的规范再次焊接。通过本法施焊的接头，无任何烧穿现象；修补焊接亦不会造成钢球飞逸及漏氦，本方法能满足核电站用镉套管的制造要求及在带内压力容器的封堵方面获得应用。
The present invention discloses a resistance spot welding method for sealing a vacuum outlet of an internal pressure vessel. This method uses a SO426 spot welding machine and special process equipment to place a stainless steel ball for sealing on the outlet, and a good spot welding joint can be obtained through secondary resistance spot welding. First, the inner cavity of the internal pressure vessel is evacuated and filled with helium to form an internal pressure of 0.103MPa, and a pre-tightening force is applied by an electrode for welding; then, a top forging force of 0.2-0.3MPa is immediately applied, and welding is performed again according to the same specification. The joints welded by this method do not have any burn-through phenomenon; the repair welding will not cause the steel ball to escape and helium to leak. This method can meet the manufacturing requirements of cadmium casings for nuclear power plants and can be applied in the sealing of internal pressure vessels.
Description
The present invention relates to a kind of welding method, relate in particular to a kind of method of the aperture resistance shutoff spot welding of on the container of band internal pressure, implementing.
The alleged method of the present invention is to put forward according to the requirement of used in nuclear power station cadmium sleeve pipe manufacture process and the permission of nuclear equipment manufacturing standard.As everyone knows, because airtight cavity internal pressure greater than the atmospheric pressure in the external world, makes band press the shutoff of interior force container to be welded on generally speaking and can't to realize.Although the employing special measure has realized this welding, and the quality of its combination degree also will directly influence next procedure TIG repairing welding quality, so that cause flying ease or producing burning leakage phenomenon of shutoff steel ball.
The objective of the invention is to propose a kind of vacuumizing, fill three one step completed processes of operation of helium and resistance shutoff spot welding.
Technical scheme of the present invention is achieved in that
At first, adopt SO462 type mash welder to make welding equipment, what lucite was made finds time, and fills the special process equipment that the helium clamping device is done resistance spot welding, Φ 3-5mm austenitic stainless steel steel ball is placed on the vacuum pumping port of band inner pressure vessel, and welds by following technological parameter:
| Electrode diameter (mm) | Electrode pressure (Mpa) | Welding current (A) | Conduction time (S) |
| Φ10 | 0.1-0.3 | 11300 | 0.25 |
Secondly, the welding process comprises following two steps:
(1) special tooling is installed at the solder joint place, vacuumize desiring vacuum-pumping container, make residual pressure reach 1mbar, fill helium subsequently, make pressure reach 0.103MPa and afterwards the stainless steel steel ball is placed on taking out on the mouth of band internal pressure, put down top electrode, apply pretightning force 0.1MPa, turn-on current, preheating and welding.
(2) finish above-mentioned welding after, apply upset force 0.2-0.3MPa immediately, treat 5-15 slightly after second, adopt the same standard to carry out the resistance spot welding second time.
Method provided by the invention successfully is applied in the development of nuclear power station cadmium sleeve pipe.By macroscopical metallographic examination, can see that the fusion of steel ball and outer sleeve mother metal contact site is good, solder joint dye penetrant inspection is qualified, and vacuum leak hunting does not have leakage.
Embodiment used in nuclear power station cadmium bushing vacuum is taken out a mouthful stainless steel steel ball resistance shutoff spot welding.
Used in nuclear power station cadmium sleeve pipe is a Welding Structure, by inside and outside sleeve, and compositions such as rust chuck and base plate.Wherein, inner sleeve is 2mm, and outer sleeve is 0.8mm, and base plate is 28mm, and material is austenite stainless steel plate; The cadmium chuck is a 0.5mmCd-2 cadmium plate.The technological procedure regulation, the cadmium sleeve pipe puts the 0.8mm outer sleeve behind bag cadmium on the 2mm inner sleeve, and the employing of inside and outside sleeve lap-joint adds a pulse TIG welding and is connected together, and forms an airtight cavity.Owing to the needs of airtight cavity vacuum leak hunting, on the 0.8mm outer sleeve, be drilled with the aperture of a Φ 2.5mm, utilize it as vacuum pumping port, to airtight chamber vacuum.Residual pressure is filled the helium of 0.103MPa with during less than 1mbar again, gets lodged on the aperture of Φ 2.5mm with Φ 3mm stainless steel ball, puts down electrode and pushes down steel ball, adds pretightning force 0.1MPa earlier, connects power supply then, preheating and welding; Immediately add the upset force of 0.2-0.3MPa.Behind the clock, adopt identical welding conditions in several seconds, carry out the resistance spot welding second time.So, can obtain in the interlayer of cadmium sleeve pipe to keep the helium of 0.103MPa pressure, the solder joint place does not have the resistance shutoff solder joint of any leakage.
The partial sectional view of present embodiment is shown in the drawings.Wherein:
(1) inner sleeve (2) Cd-2 cadmium chuck (3) outer sleeve (4) specific welding assambly
(5) stainless steel steel ball (6) vacuum pumping port (7) battery lead plate.
Claims (1)
1. resistance shutoff spot welding with the vacuum pumping port of inner pressure vessel is characterized in that the technical process of this method comprises:
A. make welding equipment with SO462 type mash welder, what lucite was made vacuumizes, and fills helium, and clamping device is made special tooling, Φ 3-Φ 5mm austenitic stainless steel steel ball is seated on the vacuum pumping port of band inner pressure vessel, and
B. take out at this and install special tooling on mouth and begin to vacuumize, make its residual pressure reach 1mbar, fill helium subsequently, after pressure reaches 0.103MPa, put down the pole plate that diameter is Φ 10mm, add pretightning force 0.1MPa, connect power supply, keep electric current 11300 peaces, switched on 0.25 second, preheating and welding, postwelding should promptly add upset force 0.2-0.3Mpa, treats that slightly 5-15 carries out the resistance spot welding second time with the same standard after second again.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN97116094A CN1075757C (en) | 1997-09-04 | 1997-09-04 | Resistance plugging spot welding of vacuum pumping port with internal pressure container |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN97116094A CN1075757C (en) | 1997-09-04 | 1997-09-04 | Resistance plugging spot welding of vacuum pumping port with internal pressure container |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1210049A CN1210049A (en) | 1999-03-10 |
| CN1075757C true CN1075757C (en) | 2001-12-05 |
Family
ID=5173666
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN97116094A Expired - Fee Related CN1075757C (en) | 1997-09-04 | 1997-09-04 | Resistance plugging spot welding of vacuum pumping port with internal pressure container |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1075757C (en) |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4864439B2 (en) * | 2005-12-06 | 2012-02-01 | 株式会社デンソー | Double tube and manufacturing method thereof |
| CN101916601B (en) * | 2010-08-13 | 2013-05-08 | 中国核工业华兴建设有限公司 | Vacuum enclosure for detecting nuclear power station leakage and detection method of nuclear power station leakage |
| CN102962627B (en) * | 2012-10-30 | 2015-04-08 | 西安航空动力股份有限公司 | Repair method for aero-engine fan casing borescope base |
| CN106624307B (en) * | 2016-12-21 | 2019-03-15 | 北方特种能源集团有限公司西安庆华公司 | A kind of high-pressure aerated welder equipped with inflammable and explosive medicament metal cavity |
| US20190358733A1 (en) * | 2018-05-22 | 2019-11-28 | GM Global Technology Operations LLC | Overlapping spot welds for improved mechanical performance and weld repair |
| CN113732471A (en) * | 2021-08-16 | 2021-12-03 | 宁波保税区艾尔希汽车有限公司 | Gas injection device and gas injection process of hybrid gas generator |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6324577A (en) * | 1985-07-11 | 1988-02-01 | 日本特殊陶業株式会社 | Ignition plug |
| JPH02169184A (en) * | 1988-12-21 | 1990-06-29 | Hitachi Ltd | Vacuum sealing device for metal tubes |
| JPH06324577A (en) * | 1993-05-11 | 1994-11-25 | Fuji Xerox Co Ltd | Multiple transfer device |
-
1997
- 1997-09-04 CN CN97116094A patent/CN1075757C/en not_active Expired - Fee Related
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6324577A (en) * | 1985-07-11 | 1988-02-01 | 日本特殊陶業株式会社 | Ignition plug |
| JPH02169184A (en) * | 1988-12-21 | 1990-06-29 | Hitachi Ltd | Vacuum sealing device for metal tubes |
| JPH06324577A (en) * | 1993-05-11 | 1994-11-25 | Fuji Xerox Co Ltd | Multiple transfer device |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1210049A (en) | 1999-03-10 |
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| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C53 | Correction of patent of invention or patent application | ||
| CB02 | Change of applicant information |
Applicant after: Dalian Baoyuan Nuclear Equipment Co., Ltd. Applicant before: State-owned No.523 Factory |
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| COR | Change of bibliographic data |
Free format text: CORRECT: APPLICANT; FROM: STATE OWNED NO. 523 FACTORY TO: DALIAN BAOYUAN NUCLEAR EQUIPMENT CO., LTD. |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |