CN110496911B - Special machining method for transition structure applied to special electric heating element - Google Patents
Special machining method for transition structure applied to special electric heating element Download PDFInfo
- Publication number
- CN110496911B CN110496911B CN201910590133.1A CN201910590133A CN110496911B CN 110496911 B CN110496911 B CN 110496911B CN 201910590133 A CN201910590133 A CN 201910590133A CN 110496911 B CN110496911 B CN 110496911B
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- China
- Prior art keywords
- transition
- tube
- nickel
- copper tube
- nickel tube
- 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.)
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- 230000007704 transition Effects 0.000 title claims abstract description 140
- 238000000034 method Methods 0.000 title claims abstract description 27
- 238000005485 electric heating Methods 0.000 title claims abstract description 10
- 238000003754 machining Methods 0.000 title description 4
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 claims abstract description 118
- 229910052759 nickel Inorganic materials 0.000 claims abstract description 59
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims abstract description 56
- 229910052802 copper Inorganic materials 0.000 claims abstract description 56
- 239000010949 copper Substances 0.000 claims abstract description 56
- 238000012545 processing Methods 0.000 claims abstract description 36
- 238000012360 testing method Methods 0.000 claims abstract description 16
- 238000012795 verification Methods 0.000 claims abstract description 7
- 238000003672 processing method Methods 0.000 claims abstract description 6
- 238000001125 extrusion Methods 0.000 claims description 6
- 238000013461 design Methods 0.000 claims 2
- 238000005242 forging Methods 0.000 claims 1
- 238000010438 heat treatment Methods 0.000 description 7
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 description 6
- 238000005219 brazing Methods 0.000 description 6
- 229910052709 silver Inorganic materials 0.000 description 6
- 239000004332 silver Substances 0.000 description 6
- 238000004140 cleaning Methods 0.000 description 5
- 238000002474 experimental method Methods 0.000 description 2
- 230000004907 flux Effects 0.000 description 2
- 238000007689 inspection Methods 0.000 description 2
- 238000000462 isostatic pressing Methods 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 239000000314 lubricant Substances 0.000 description 1
- 230000001050 lubricating effect Effects 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000003758 nuclear fuel Substances 0.000 description 1
- 230000000750 progressive effect Effects 0.000 description 1
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D39/00—Application of procedures in order to connect objects or parts, e.g. coating with sheet metal otherwise than by plating; Tube expanders
- B21D39/04—Application of procedures in order to connect objects or parts, e.g. coating with sheet metal otherwise than by plating; Tube expanders of tubes with tubes; of tubes with rods
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Resistance Heating (AREA)
Abstract
一种应用于特种电热元件的过渡结构特种加工方法，过渡结构包括过渡铜管和过渡镍管，且过渡铜管的一端伸入到过渡镍管的一端的内部，方法包括如下步骤：S1、设计并且加工过渡铜管和过渡镍管；S2、清理和检验过渡铜管与过渡镍管，并且调试加工设备；S3、利用加工设备对过渡铜管和过渡镍管进行试验加工，得到试验成品；S4、对试验成品进行验证，若验证通过则执行S5，否则返回S1；S5、利用加工设备对过渡铜管和过渡镍管进行正式加工，得到过渡结构。本发明提供一种应用于特种电热元件的过渡结构特种加工方法，所加工出的过渡结构连接稳定，精度高，性能优良。
A special processing method for a transition structure applied to a special electric heating element. The transition structure includes a transition copper tube and a transition nickel tube, and one end of the transition copper tube extends into the interior of one end of the transition nickel tube. The method includes the following steps: S1. Designing And process the transition copper tube and transition nickel tube; S2, clean and inspect the transition copper tube and transition nickel tube, and debug the processing equipment; S3, use the processing equipment to carry out experimental processing on the transition copper tube and the transition nickel tube to obtain the test product; S4 . Verify the test product. If the verification is passed, execute S5, otherwise return to S1; S5, use the processing equipment to formally process the transition copper tube and the transition nickel tube to obtain the transition structure. The invention provides a special processing method for a transition structure applied to a special electric heating element. The processed transition structure has stable connection, high precision and excellent performance.
Description
Technical Field
The invention relates to the technical field of metal part machining, in particular to a special machining method for a transition structure applied to a special electric heating element.
Background
In the fuel assembly thermal hydraulic experiment, the critical heat flux density experiment has the highest requirement on the heating element, the heating element needs to adapt to the same thermal environment as the prototype reactor core, the external dimension is the same as that of the nuclear fuel rod, and the surface heat flux density is higher.
The transition structure of the heating element conveys current to the heating section for heating, and the transition section is required to have the characteristics of low resistance and high reliable connection. At present, the transition structure of the heating element adopts silver brazing to fix nickel and copper bars, and the silver brazing cannot ensure that two metals are completely contacted, so that the local resistance of the transition section is increased, the risk of burning loss is caused, and the heating element is scrapped; and the silver brazing has the possibility of falling off, which causes connection failure. The technical scheme of the invention adopts a continuous balanced extrusion process to replace a silver brazing connection method, thereby greatly reducing the contact resistance and simplifying the process.
Disclosure of Invention
In order to solve the defects in the prior art, the invention provides the special processing method of the transition structure applied to the special electric heating element, and the processed transition structure is stable in connection, high in precision and excellent in performance.
In order to achieve the purpose, the invention adopts the specific scheme that: in order to achieve the purpose, the invention adopts the specific scheme that: a special processing method of a transition structure applied to a special electric heating element is disclosed, wherein the transition structure comprises a transition copper pipe and a transition nickel pipe, one end of the transition copper pipe extends into one end of the transition nickel pipe, and the method comprises the following steps:
s1, designing and processing the transition copper pipe and the transition nickel pipe;
s2, cleaning and checking the transition copper pipe and the transition nickel pipe, and debugging processing equipment;
s3, performing test processing on the transition copper pipe and the transition nickel pipe by using the processing equipment to obtain a test finished product;
s4, verifying the test finished product, if the test finished product passes the verification, executing S5, and if the test finished product passes the verification, returning to S1;
and S5, utilizing the processing equipment to carry out formal processing on the transition copper pipe and the transition nickel pipe to obtain the transition structure.
Preferably, in S2, the transition copper pipe and the transition nickel pipe are cleaned and dried by compressed air, the outer diameter of the transition copper pipe and the inner diameter of the transition copper pipe are measured by using a measuring tool when the transition copper pipe is inspected, and the outer diameter of the transition nickel pipe and the inner diameter of the transition nickel pipe are measured by using a measuring tool when the transition nickel pipe is inspected.
Preferably, in S4, when verifying the test finished product, the outer diameter of the transition copper pipe, the inner diameter of the transition copper pipe, the outer diameter of the transition nickel pipe, and the inner diameter of the transition nickel pipe are measured by using a measuring tool when verifying the transition copper pipe.
Preferably, in S2, the processing equipment is set up and is idle-run for 2-3 minutes.
Preferably, the trial process in S3 and the official process in S5 both use a continuous isostatic extrusion process.
Preferably, the continuous isostatic extrusion process is hollow swaging.
Preferably, the method further comprises:
and S6, detecting the size and the resistance value of the transition structure.
Compared with the original silver brazing process, the transition nickel tube is deformed by external force, so that the transition nickel tube is completely contacted with the transition copper tube, the contact area is increased, the low resistance and the high conductivity are ensured, and the possibility of burning loss of a transition structure is eliminated. In addition, the invention can fully ensure the processing precision through the cleaning and inspection of the transition copper pipe and the transition nickel pipe, the debugging of processing equipment and the verification of a test finished product.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
Fig. 1 is a schematic diagram of a transition structure.
Reference numerals: 1-transition copper pipe and 2-transition nickel pipe.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1, a special processing method for a transition structure of a special electric heating element includes a transition copper tube 1 and a transition nickel tube 2, wherein one end of the transition copper tube 1 extends into one end of the transition nickel tube 2, and the method includes steps S1 to S5.
S1, designing and processing a transition copper pipe 1 and a transition nickel pipe 2, wherein the excircle dimension of the transition copper pipe 1 is phi 9mm, the inner hole dimension of the transition nickel pipe 2 is phi 9mm, a proper fit clearance is designed between the transition copper pipe 1 and the transition nickel pipe 2, the outer diameter dimension of the transition nickel pipe 2 is phi 11.5mm, and the outer diameter value of the transition nickel pipe 2 after extrusion is phi 11 mm.
And S2, cleaning and checking the transition copper pipe 1 and the transition nickel pipe 2, and debugging processing equipment.
And S3, testing and processing the transition copper pipe 1 and the transition nickel pipe 2 by using processing equipment to obtain a test finished product.
And S4, verifying the finished product, if the verification is passed, executing S5, and otherwise, returning to S1.
S5, formally processing the transition copper tube 1 and the transition nickel tube 2 by using processing equipment, extruding for four times (ensuring that the transition copper tube 1 is completely contacted with the transition nickel tube 2) at 0 degree, 45 degrees, 90 degrees and 135 degrees respectively, and extruding the outer diameters of the transition copper tube 1 and the transition nickel tube 2 to the designed dimension phi 11mm to obtain the transition structure.
Compared with the original silver brazing process, the transition nickel tube 2 is deformed through external force, so that the transition nickel tube 2 is completely contacted with the transition copper tube 1, the contact area is increased, the low resistance and the high conductivity are ensured, and the possibility of burning loss of a transition structure is eliminated. In addition, the invention can fully ensure the processing precision through the cleaning and inspection of the transition copper pipe 1 and the transition nickel pipe 2, the debugging of processing equipment and the verification of a test finished product.
Further, in S2, cleaning the transition copper tube 1 and the transition nickel tube 2, drying the transition copper tube 1 and the transition nickel tube 2 with compressed air, measuring the outer diameter of the transition copper tube 1 and the inner diameter of the transition copper tube 1 with a measuring tool when inspecting the transition copper tube 1, and measuring the outer diameter of the transition nickel tube 2 and the inner diameter of the transition nickel tube 2 with a measuring tool when inspecting the transition nickel tube 2. In S4, when verifying the test product, the measuring tool is used to measure the outer diameter of the transition copper tube 1, the inner diameter of the transition copper tube 1, the outer diameter of the transition nickel tube 2, and the inner diameter of the transition nickel tube 2 when verifying the transition copper tube 1. The measuring tools used can be an inner diameter gauge, an outer diameter percentage gauge and a vernier caliper.
Further, in S2, the processing device is unloaded for 2 to 3 minutes while the processing device is set up. Through no-load operation, the lubricating parts of the processing equipment can be uniformly distributed with the lubricating agent, the normal operation of the processing equipment is ensured, and the processing precision is improved.
Further, the trial processing in S3 and the main processing in S5 both adopt a continuous isostatic pressing process. In this embodiment, the continuous isostatic pressing process is hollow rotary swaging, and in other embodiments of the present invention, other processes having the same function may be used.
Further, the method further includes S6.
And S6, detecting the size and the resistance value of the transition structure. The electrical performance of the transition structure can be verified through S6, thereby ensuring the performance of the final special electric heating element.
The embodiments in the present description are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (1)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910590133.1A CN110496911B (en) | 2019-07-02 | 2019-07-02 | Special machining method for transition structure applied to special electric heating element |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910590133.1A CN110496911B (en) | 2019-07-02 | 2019-07-02 | Special machining method for transition structure applied to special electric heating element |
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| Publication Number | Publication Date |
|---|---|
| CN110496911A CN110496911A (en) | 2019-11-26 |
| CN110496911B true CN110496911B (en) | 2021-08-10 |
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| CN201910590133.1A Expired - Fee Related CN110496911B (en) | 2019-07-02 | 2019-07-02 | Special machining method for transition structure applied to special electric heating element |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201791842U (en) * | 2010-06-25 | 2011-04-13 | 浙江毅力汽车空调有限公司 | Pipeline joint crimping tool |
| CN104438896A (en) * | 2014-09-30 | 2015-03-25 | 西安创新精密仪器研究所 | Technology for connecting same or different metal material pipes in rotary forging mode |
| JP2016165736A (en) * | 2015-03-09 | 2016-09-15 | 日新製鋼株式会社 | Joint pipe body and manufacturing method for the same |
| CN207402004U (en) * | 2017-08-21 | 2018-05-25 | 海隆管道工程技术服务有限公司 | A kind of lined composite steel tube socket joint welding system |
| JP2019005807A (en) * | 2017-06-27 | 2019-01-17 | 株式会社神戸製鋼所 | Member joining method and joint body |
| CN109226542A (en) * | 2018-11-19 | 2019-01-18 | 江阴市液压油管有限公司 | A kind of hydraulic oil pipe tube expanding joint component |
-
2019
- 2019-07-02 CN CN201910590133.1A patent/CN110496911B/en not_active Expired - Fee Related
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201791842U (en) * | 2010-06-25 | 2011-04-13 | 浙江毅力汽车空调有限公司 | Pipeline joint crimping tool |
| CN104438896A (en) * | 2014-09-30 | 2015-03-25 | 西安创新精密仪器研究所 | Technology for connecting same or different metal material pipes in rotary forging mode |
| JP2016165736A (en) * | 2015-03-09 | 2016-09-15 | 日新製鋼株式会社 | Joint pipe body and manufacturing method for the same |
| JP2019005807A (en) * | 2017-06-27 | 2019-01-17 | 株式会社神戸製鋼所 | Member joining method and joint body |
| CN207402004U (en) * | 2017-08-21 | 2018-05-25 | 海隆管道工程技术服务有限公司 | A kind of lined composite steel tube socket joint welding system |
| CN109226542A (en) * | 2018-11-19 | 2019-01-18 | 江阴市液压油管有限公司 | A kind of hydraulic oil pipe tube expanding joint component |
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| Publication number | Publication date |
|---|---|
| CN110496911A (en) | 2019-11-26 |
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Effective date of registration: 20230306 Address after: 518061 no.3688 Nanhai Avenue, Yuehai street, Nanshan District, Shenzhen City, Guangdong Province Patentee after: SHENZHEN University Address before: 518000 2112, building 1, Changfu Jinmao building, free trade zone, Futian District, Shenzhen City, Guangdong Province Patentee before: Shenzhen Union Clean Energy Research Institute |
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Granted publication date: 20210810 |