CN101468431A - Composite welding scheme between dissimilar metal materials - Google Patents
Composite welding scheme between dissimilar metal materials Download PDFInfo
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- CN101468431A CN101468431A CNA2007103046100A CN200710304610A CN101468431A CN 101468431 A CN101468431 A CN 101468431A CN A2007103046100 A CNA2007103046100 A CN A2007103046100A CN 200710304610 A CN200710304610 A CN 200710304610A CN 101468431 A CN101468431 A CN 101468431A
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Abstract
The invention relates to a composite welding proposal for different materials, in particular to composite welding for different materials between a cold finger of an expansion machine and a cold cap in a Stirling refrigerator, which belongs to the field of machinery. The welding proposal is realized by combining electron beam welding with laser welding. The oxygen-free copper cold cap is firstly connected with a transitional material into a whole by utilizing an electron beam welding mode, and then the laser welding is utilized to weld the cold cap with a thin-walled tube of the cold finger of the expansion machine after finish processing. The invention solves the difficult problem of welding different materials between the cold cap and the cold finger of the expansion machine and has the advantages of small deformation of welding seams, low structural leak rate and prolonged service life of the refrigerator. Likewise, the welding proposal can be applied to other similar occasions in the industry.
Description
Technical field
The present invention relates to a kind of welding method, foreign material composite welding between particularly a kind of decompressor cold finger that is used for sterlin refrigerator and cold cap belongs to mechanical field.
Background technology
Because sterlin refrigerator has many advantages, at present in the space and ground have purposes widely, sterlin refrigerator belongs to very precision machinery, for and load between good transfer of heat, the material of cold cap and cold finger often is a foreign material, and this brings great difficulty for the welding of cold cap and cold finger.Cold finger belongs to elongated, thin-walled parts has very high requirement to machining and welding, requires machining stress little, and requires to have very high air-tightness after the welding, generally requires leak rate to be lower than 1 * 10
-8Pam
3S
-1, more long-life refrigeration machine has higher requirement to leak rate, and part temperature rise and heat affected area are little when requiring welding, and the part deformation that welding causes is little.Present common welding scheme can't satisfy above requirement, so be badly in need of inventing the specific (special) requirements that a kind of new welding scheme satisfies foreign material composite welding between decompressor cold finger in the sterlin refrigerator and cold cap.
Summary of the invention
The present invention proposes a kind of composite welding scheme between dissimilar metal materials, it has satisfied the decompressor cold finger in the sterlin refrigerator and the specific (special) requirements of the welding between the cold cap foreign material, the part temperature rise is low when making welding, the heat affected area is little, part deformation is little simultaneously, and has satisfied the requirement of welding back high-air-tightness.
The present invention is achieved through the following technical solutions:
The present invention proposes foreign material composite welding scheme between a kind of decompressor cold finger that is used for sterlin refrigerator and cold cap, it relates to the cold cap of decompressor, welding transition ring and cold finger in the sterlin refrigerator, close position after their three's welding is that the welding transition ring set is on the cold cap of decompressor, the welding transition ring is a stairstepping, the decompressor cold finger is a light-wall pipe, is enclosed within on the welding transition ring after its welding.Decompressor cold finger material in the sterlin refrigerator is a stainless steel, and cold cap material is an oxygen-free copper, because the material difference between them, the solderability of the two is poor.So cold cap and transition rings that the present invention program relates to are stayed allowance for finish when machining, the transition rings material is identical with decompressor cold finger material.At first, utilize the higher electron beam welding of energy, the cold cap of decompressor is connect with the welding transition boxing identical with decompressor cold finger material, at first utilize frock to utilize frock to clamp on cold cap and transition rings during welding, utilize electron beam welding that the two is welded as a whole, then carry out helium mass spectrum leak detection, after the helium mass spectrum leak detection leak rate is up to standard, sub-assembly with the two carries out fine finishining again, makes the sub-assembly size reach design size.At last, utilize Laser Welding that welding transition ring in the two sub-assembly and decompressor cold finger light-wall pipe are welded, after the soldering part passed examination, just finished composite welding operation between whole foreign material.So just can reach the specific (special) requirements of foreign material composite welding between decompressor cold finger in the sterlin refrigerator and cold cap.
Description of drawings
Fig. 1 is cold cap of the present invention and welding transition ring assembling axial, cross-sectional view; (the spacer shell part is not net shape and size among the figure, after operation to be hunted leak is finished, is processed into shape shown in Figure 2.)
Fig. 2 is cold cap of the present invention and decompressor cold finger welding axial, cross-sectional view.
Among the figure: 1-cold cap, 2-welding transition ring, 3-cold finger.
The specific embodiment
The invention will be further described below in conjunction with drawings and Examples.
As shown in Figure 2, the present invention proposes foreign material composite welding scheme between a kind of decompressor cold finger that is used for sterlin refrigerator and cold cap, it relates to the cold cap 1 of decompressor, welding transition ring 2 and cold finger 3 in the sterlin refrigerator, close position after their three's welding is that welding transition ring 2 is enclosed within on the cold cap 1 of decompressor, welding transition ring 2 is a stairstepping, decompressor cold finger 3 is a light-wall pipe, is enclosed within after its welding on welding transition 2 rings.Decompressor cold finger 3 materials in the sterlin refrigerator are stainless steel, and cold cap 1 material is an oxygen-free copper and since between them the material difference, the solderability of the two is poor.So cold cap 1 and welding transition ring 2 that the present invention program relates to stay allowance for finish when machining, welding transition ring 2 materials are identical with decompressor cold finger 3 materials.At first, utilize the higher electron beam welding of energy, the cold cap 1 of decompressor is welded with the welding transition ring 2 identical with decompressor cold finger 3 materials, at first utilize frock that cold cap 1 and welding transition ring 2 are clamped during welding, utilize electron beam welding that the two is welded as a whole, the sub-assembly of the two before the fine finishining is not as shown in Figure 1.Then carry out helium mass spectrum leak detection, after the helium mass spectrum leak detection rate is up to standard, sub-assembly with the two carries out fine finishining again, mainly be that the welding transition ring in the two sub-assembly 2 is carried out turning fine finishining, make its size reach the designing requirement of drawing, the structure of the welding transition ring 2 in the two sub-assembly after the fine finishining as shown in Figure 2.At last, utilize Laser Welding that the light-wall pipe of the welding transition ring in the two sub-assembly 2 with decompressor cold finger 3 welded.After the soldering part passed examination, just finished composite welding operation between whole foreign material.So just can reach the decompressor cold finger 3 in the sterlin refrigerator and the specific (special) requirements of 2 foreign material composite welding of cold cap.
Claims (4)
1, a kind of composite welding scheme between dissimilar metal materials, it relates to the cold cap of decompressor (1), welding transition ring (2) and cold finger (3) in the sterlin refrigerator; It is characterized in that: close the position after the welding is that welding transition ring (2) is enclosed within on the cold cap of decompressor (1), and welding transition ring (2) is a stairstepping, and decompressor cold finger (3) is a light-wall pipe, is enclosed within on welding transition (2) ring after its welding.
2, a kind of composite welding scheme between dissimilar metal materials as claimed in claim 1 is characterized in that: need add welding transition ring (2) between the light-wall pipe of two kinds of cold caps of welding material (1) and decompressor cold finger (3) for composite welding between foreign material.
3, a kind of composite welding scheme between dissimilar metal materials as claimed in claim 1 is characterized in that: cold cap (1) is made with oxygenless copper material, and welding transition ring (2) and decompressor cold finger light-wall pipe (3) adopt stainless steel material to make.
4, a kind of composite welding scheme between dissimilar metal materials as claimed in claim 1, it is characterized in that: cold cap (1) stays allowance for finish with welding transition ring (2) when machining, utilize the higher electron beam welding of energy, the cold cap of decompressor (1) is welded with the welding transition ring (2) identical with decompressor cold finger (3) material; Then carry out helium mass spectrum leak detection, after the helium mass spectrum leak detection rate was up to standard, the sub-assembly with the two carried out fine finishining again, mainly was that the welding transition ring (2) in the two sub-assembly is carried out turning fine finishining; At last, utilize Laser Welding that the light-wall pipe of the welding transition ring (2) in the two sub-assembly with decompressor cold finger (3) welded, after the soldering part passed examination, just finished composite welding operation between whole foreign material.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200710304610 CN101468431B (en) | 2007-12-28 | 2007-12-28 | Composite welding scheme between dissimilar metal materials |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200710304610 CN101468431B (en) | 2007-12-28 | 2007-12-28 | Composite welding scheme between dissimilar metal materials |
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| CN101468431A true CN101468431A (en) | 2009-07-01 |
| CN101468431B CN101468431B (en) | 2011-03-30 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN 200710304610 Expired - Fee Related CN101468431B (en) | 2007-12-28 | 2007-12-28 | Composite welding scheme between dissimilar metal materials |
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Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102407408A (en) * | 2011-09-23 | 2012-04-11 | 南京工业大学 | Welding joint suitable for welding dissimilar metal materials and preparation method thereof |
| CN103759905A (en) * | 2014-01-17 | 2014-04-30 | 中国科学院上海技术物理研究所 | Device for conducting pressurization leakage detection on split type Dewar welding line at low temperature |
| CN106881537A (en) * | 2015-12-15 | 2017-06-23 | 航天科工惯性技术有限公司 | A kind of assembly method of accelerometer binding post and torquer |
| CN107511549A (en) * | 2017-09-04 | 2017-12-26 | 中国电子科技集团公司第十研究所 | A kind of compound cold bench and its manufacture method |
| CN108469129A (en) * | 2018-03-19 | 2018-08-31 | 中国电子科技集团公司第十六研究所 | A kind of sterlin refrigerator cold finger cold plate structure |
| CN109128544A (en) * | 2018-10-15 | 2019-01-04 | 华北水利水电大学 | A kind of method of laser spot welding-electron beam soldering composite welding high nitrogen steel |
| CN110625284A (en) * | 2019-08-14 | 2019-12-31 | 中国电子科技集团公司第十一研究所 | Infrared detector Dewar welding method |
| CN110802337A (en) * | 2019-12-09 | 2020-02-18 | 西安航天发动机有限公司 | Method for sealing and welding end face of annular copper-steel brazing part with sandwich structure |
| CN111486004A (en) * | 2020-04-21 | 2020-08-04 | 中国航发沈阳发动机研究所 | Air inlet casing frame structure and welding method thereof |
| CN111720234A (en) * | 2019-03-21 | 2020-09-29 | 强莉莉 | Split composite piston and forming method |
| CN111790984A (en) * | 2020-09-01 | 2020-10-20 | 哈尔滨工业大学 | Preparation method of dissimilar titanium alloy composite part based on laser welding and laser material increase |
| CN112158029A (en) * | 2020-09-16 | 2021-01-01 | 中油国家油气钻井装备工程技术研究中心有限公司 | Traction axle adopting combined type wheel shaft structure |
| CN115041860A (en) * | 2022-06-09 | 2022-09-13 | 哈尔滨电机厂有限责任公司 | Novel head measuring body welding structure of hydroelectric ultrahigh water head unit |
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2007
- 2007-12-28 CN CN 200710304610 patent/CN101468431B/en not_active Expired - Fee Related
Cited By (18)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102407408A (en) * | 2011-09-23 | 2012-04-11 | 南京工业大学 | Welding joint suitable for welding dissimilar metal materials and preparation method thereof |
| CN103759905A (en) * | 2014-01-17 | 2014-04-30 | 中国科学院上海技术物理研究所 | Device for conducting pressurization leakage detection on split type Dewar welding line at low temperature |
| CN103759905B (en) * | 2014-01-17 | 2016-01-13 | 中国科学院上海技术物理研究所 | A kind of at low temperatures to the device of separated type Dewar weld seam pressurization leakage detection |
| CN106881537A (en) * | 2015-12-15 | 2017-06-23 | 航天科工惯性技术有限公司 | A kind of assembly method of accelerometer binding post and torquer |
| CN107511549A (en) * | 2017-09-04 | 2017-12-26 | 中国电子科技集团公司第十研究所 | A kind of compound cold bench and its manufacture method |
| CN108469129A (en) * | 2018-03-19 | 2018-08-31 | 中国电子科技集团公司第十六研究所 | A kind of sterlin refrigerator cold finger cold plate structure |
| CN109128544A (en) * | 2018-10-15 | 2019-01-04 | 华北水利水电大学 | A kind of method of laser spot welding-electron beam soldering composite welding high nitrogen steel |
| CN109128544B (en) * | 2018-10-15 | 2021-06-01 | 华北水利水电大学 | Method for laser spot welding-electron beam brazing composite welding of high-nitrogen steel |
| CN111720234A (en) * | 2019-03-21 | 2020-09-29 | 强莉莉 | Split composite piston and forming method |
| CN110625284A (en) * | 2019-08-14 | 2019-12-31 | 中国电子科技集团公司第十一研究所 | Infrared detector Dewar welding method |
| CN110802337A (en) * | 2019-12-09 | 2020-02-18 | 西安航天发动机有限公司 | Method for sealing and welding end face of annular copper-steel brazing part with sandwich structure |
| CN110802337B (en) * | 2019-12-09 | 2021-04-09 | 西安航天发动机有限公司 | Method for sealing and welding end face of annular copper-steel brazing part with sandwich structure |
| CN111486004A (en) * | 2020-04-21 | 2020-08-04 | 中国航发沈阳发动机研究所 | Air inlet casing frame structure and welding method thereof |
| CN111486004B (en) * | 2020-04-21 | 2021-11-19 | 中国航发沈阳发动机研究所 | Air inlet casing frame structure and welding method thereof |
| CN111790984A (en) * | 2020-09-01 | 2020-10-20 | 哈尔滨工业大学 | Preparation method of dissimilar titanium alloy composite part based on laser welding and laser material increase |
| CN112158029A (en) * | 2020-09-16 | 2021-01-01 | 中油国家油气钻井装备工程技术研究中心有限公司 | Traction axle adopting combined type wheel shaft structure |
| CN115041860A (en) * | 2022-06-09 | 2022-09-13 | 哈尔滨电机厂有限责任公司 | Novel head measuring body welding structure of hydroelectric ultrahigh water head unit |
| CN115041860B (en) * | 2022-06-09 | 2023-11-14 | 哈尔滨电机厂有限责任公司 | Water and electricity superhigh water head unit gauge head body welded structure |
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| Publication number | Publication date |
|---|---|
| CN101468431B (en) | 2011-03-30 |
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Application publication date: 20090701 Assignee: LANZHOU HONGRUI AEROSPACE MECHANICAL AND ELECTRICAL EQUIPMENT CO., LTD. Assignor: No. 510 Institute, the Fifth Academy of China Aerospace Science and Technology Corporation Contract record no.: 2013620000027 Denomination of invention: Composite welding scheme between dissimilar metal materials Granted publication date: 20110330 License type: Exclusive License Record date: 20130702 |
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