CN107900504A - Fuel rod piezoresistive weld clip head - Google Patents
Fuel rod piezoresistive weld clip head Download PDFInfo
- Publication number
- CN107900504A CN107900504A CN201711345548.XA CN201711345548A CN107900504A CN 107900504 A CN107900504 A CN 107900504A CN 201711345548 A CN201711345548 A CN 201711345548A CN 107900504 A CN107900504 A CN 107900504A
- Authority
- CN
- China
- Prior art keywords
- collet
- fuel rod
- electric conductor
- rear end
- piezoresistive
- 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.)
- Granted
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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
- B23K11/00—Resistance welding; Severing by resistance heating
- B23K11/30—Features relating to electrodes
- B23K11/31—Electrode holders and actuating devices therefor
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Fuel-Injection Apparatus (AREA)
- Connections Effected By Soldering, Adhesion, Or Permanent Deformation (AREA)
Abstract
The invention discloses a kind of fuel rod piezoresistive weld clip head, including Gripper body, the Gripper body includes collet front end and collet rear end, several pieces sheet metals are equipped between the collet front end and collet rear end, the surface that sheet metal described in adjacent two panels is in contact is equipped with insulating coating, and the sheet metal also is provided with insulating coating with the surface that the Gripper body is in contact, all sheet metals are along the axially stacking of fuel rod with being distributed, all sheet metals, collet front end and collet rear end, connected by least one electric conductor, and the electric conductor, the resistance value of cladding tubes and end plug is mutually matched.The present invention can be such that welding current is evenly distributed along fuel rod longitudinal comparison, relatively significantly increase the compact zone of welding, the welding performance between end plug and cladding tubes is improved, overcomes smaller using local electrical resistance during copper collet, causes electric current to flow through the defects of region is small, weld seam longitudinal length is short.
Description
Technical field
The present invention relates to resistance welding technology field, more particularly to a kind of fuel rod piezoresistive weld clip head.
Background technology
The weldering of fuel rod piezoresistive is to being welding as one end plug and cladding tubes, under the effect of less extruding force, makes bag
Package end face is contacted with end plug mating surface, applies electric current to workpiece by electrode, since the resistance of work piece interface is higher, contact
The resistance heat that face and adjacent domain produce makes the metal of welding surface be in mecystasis, and then rapid butt joint applies upset force,
The welding of end plug and cladding tubes is completed by upset.
The important technological problems of fuel rod piezoresistive weldering are how to obtain sufficiently long longitudinal seam.Shown in Fig. 1 is
Situation about being welded using conventional copper collet, arrow represents current direction in figure, due to electric current tend to flow through resistance compared with
Small region, and the resistivity of cladding tubes is more than copper collet, most electric current is directly via some field flow orientation bag of end plug
Package and copper collet, without carrying out longitudinal flow on cladding tubes, cause the longitudinal length of weld seam between cladding tubes and end plug
L1 is smaller, and the length L2 in unwelded region is larger, and the closely knit section length of welding is difficult to reach dreamboat.
The content of the invention
It is an object of the invention to overcome the use copper collet in the presence of the prior art to carry out fuel rod piezoresistive weldering
When, a kind of less deficiency of longitudinal length of weld seam, there is provided fuel rod piezoresistive weld clip head.
In order to realize foregoing invention purpose, the present invention provides following technical scheme：
A kind of fuel rod piezoresistive weld clip head, including Gripper body, the Gripper body include collet front end and collet
Rear end.Several pieces sheet metals, the surface that sheet metal described in adjacent two panels is in contact are equipped between the collet front end and collet rear end
Insulating coating is equipped with, and the sheet metal also is provided with insulating coating with the surface that the Gripper body is in contact, it is all described
Sheet metal is along the axially stacking of fuel rod with being distributed.All sheet metals, collet front end and collet rear end, by least one
Electric conductor connects, and the resistance value of the electric conductor, cladding tubes and end plug is mutually matched.
Fuel rod piezoresistive weld clip head of the present invention, as a result of the sheet metal of several pieces mutually insulateds, and leads to
Cross one or sheet metal, collet front end are connected by several electric conductors with collet rear end, and the electric conductor, cladding tubes and end plug
Resistance value be mutually matched that (for the fuel rod clad pipe of different-diameter and wall thickness, this resistance value of electric conductor can pass through
The result of soldering test is matched and optimized) so that welding current can be flowed to per a piece of sheet metal, and through each along electric conductor
Piece sheet metal flows to cladding tubes and end plug respectively again so that welding current is evenly distributed along fuel rod longitudinal comparison, brighter
Increase the compact zone of welding aobviously, improve the welding performance between end plug and cladding tubes.On the other hand, also overcome and pressed from both sides using copper
Local electrical resistance is smaller during head, causes electric current to flow through the defects of region is small, weld seam longitudinal length is short.
Preferably, after the electric conductor is installed on the sheet metal, collet front end and collet by least one mounting hole
On end.
Preferably, internal thread is equipped with the mounting hole, the electric conductor is equipped with the external screw thread being adapted, installing and dismounting side
Just.
Preferably, the electric conductor is installed on the outside of the sheet metal, collet front end and collet rear end, installing and dismounting side
Just.
Preferably, the Gripper body includes at least two arc clamping head units, and all cartridge units mutually surround
One circular ring shape Gripper body, so as to fulfill the welding of a circumference.
Preferably, it is connected between the collet front end, sheet metal and collet rear end by highstrenghtpiston's screw, these
Highstrenghtpiston's screw is non-conductive.
Compared with prior art, beneficial effects of the present invention：
Fuel rod piezoresistive weld clip head of the present invention, as a result of the sheet metal of several pieces mutually insulateds, and leads to
Cross one or sheet metal, collet front end are connected by several electric conductors with collet rear end, and the electric conductor, cladding tubes and end plug
Resistance value be mutually matched that (for the fuel rod clad pipe of different-diameter and wall thickness, this resistance value of electric conductor can pass through
The result of soldering test is matched and optimized) so that welding current can be flowed to per a piece of sheet metal, and through each along electric conductor
Piece sheet metal flows to cladding tubes and end plug respectively again so that welding current is evenly distributed along fuel rod longitudinal comparison, brighter
Increase the compact zone of welding aobviously, improve the welding performance between end plug and cladding tubes.On the other hand, also overcome and pressed from both sides using copper
Local electrical resistance is smaller during head, causes electric current to flow through the defects of region is small, weld seam longitudinal length is short.
Brief description of the drawings：
Fig. 1 is the current distributing figure for carrying out electric resistance welding using copper collet in the prior art.
Fig. 2 is the current distributing figure that electric resistance welding is carried out using the fuel rod piezoresistive weld clip head described in embodiment 1.
Fig. 3 is the current distributing figure that electric resistance welding is carried out using the fuel rod piezoresistive weld clip head described in embodiment 2.
Fig. 4 is the structure diagram of the electric conductor described in embodiment 1.
Fig. 5 is the structure diagram of the fuel rod piezoresistive weld clip head described in embodiment 1.
Fig. 6 is the structure diagram of the electric conductor described in embodiment 2.
Fig. 7 is the structure diagram of the fuel rod piezoresistive weld clip head described in embodiment 2.
Marked in figure：1- cladding tubes, 2- end plugs, 3- Gripper bodies, 31- collets front end, 32- collets rear end, 4- electric conductors,
5- sheet metals, 6- plastics screws.
Embodiment
With reference to test example and embodiment, the present invention is described in further detail.But this should not be understood
Following embodiment is only limitted to for the scope of the above-mentioned theme of the present invention, it is all that this is belonged to based on the technology that present invention is realized
The scope of invention.
Embodiment 1
As shown in fig. 4-5, a kind of fuel rod piezoresistive weld clip head, including Gripper body 3, the Gripper body 3 wrap
Include collet front end 31 and collet rear end 32.Several pieces sheet metals 5, the folder are equipped between the collet front end 31 and collet rear end 32
It is connected between head front end 31, sheet metal 5 and collet rear end 32 by two highstrenghtpiston's screws 6, these highstrenghtpistons
Screw 6 is non-conductive.
The surface that sheet metal 5 described in adjacent two panels is in contact is equipped with insulating coating, and the sheet metal 5 and the collet
The surface that body 3 is in contact also is provided with insulating coating, and all sheet metals 5 are along the axially stacking of fuel rod with being distributed.It is all
The sheet metal 5, collet front end 31 and collet rear end 32, are connected by least one electric conductor 4, and the electric conductor 4, involucrum
The resistance value of pipe 1 and end plug 2 is mutually matched.
The electric conductor 4 is installed on the sheet metal 5, collet front end 31 and collet rear end 32 by least one mounting hole
On.Internal thread is equipped with the mounting hole, the electric conductor 4 is equipped with the external screw thread being adapted, is easily installed dismounting.
The Gripper body 3 includes at least two arc clamping head units, and all cartridge units mutually surround a circle
Annular chuck body 3, so as to fulfill the welding of a circumference.
Fuel rod piezoresistive weld clip head of the present invention, as a result of the sheet metal 5 of several pieces mutually insulateds, and leads to
Cross one or sheet metal 5, collet front end 31 are connected by several electric conductors 4 with collet rear end 32, and the electric conductor 4, involucrum
The resistance value of pipe 1 and end plug 2 is mutually matched (for the fuel rod clad pipe of different-diameter and wall thickness, this resistance of electric conductor
Value can be matched and optimized by the result of soldering test) so that welding current can flow to every piece of metal along electric conductor 4
Piece 5, and through flowing to cladding tubes 1 and end plug 2 respectively again per a piece of sheet metal 5 so that welding current is along fuel rod longitudinal comparison
(as shown in Figure 2) is evenly distributed, relatively significantly increases the compact zone of welding, improves the weldability between end plug 2 and cladding tubes 1
Energy.On the other hand, also overcome smaller using local electrical resistance during copper collet, causing electric current to flow through, region is small, weld seam longitudinal length
The defects of short.
Embodiment 2
As shown in Fig. 3, Fig. 6, Fig. 7, difference lies in the electric conductor 4 is installed on the gold to the present embodiment with embodiment 1
Belong to piece 5, collet front end 31 and the outside of collet rear end 32, it is easy for assemble or unload.
Above example only not limits technical solution described in the invention to illustrate the present invention, although this explanation
Book is with reference to above-mentioned each embodiment to present invention has been detailed description, but the present invention is not limited to above-mentioned specific implementation
Mode, therefore any modify to the present invention or equivalent substitution；And the technical side of all spirit and scope for not departing from invention
Case and its improvement, it should all cover among scope of the presently claimed invention.
Claims (4)
1. a kind of fuel rod piezoresistive weld clip head, it is characterised in that including Gripper body (3), the Gripper body (3) includes
Collet front end (31) and collet rear end (32)；
Several pieces sheet metals (5), sheet metal (5) described in adjacent two panels are equipped between the collet front end (31) and collet rear end (32)
The surface being in contact is equipped with insulating coating, and the sheet metal (5) also is provided with the surface that the Gripper body (3) is in contact
Insulating coating, all sheet metals (5) are along the axially stacking of fuel rod with being distributed；
All sheet metals (5), collet front end (31) and collet rear end (32), are connected by least one electric conductor (4), and
The resistance value of the electric conductor (4), cladding tubes (1) and end plug (2) is mutually matched.
2. fuel rod piezoresistive weld clip head according to claim 1, it is characterised in that the electric conductor (4) is by extremely
A few mounting hole is installed on the sheet metal (5), on collet front end (31) and collet rear end (32).
3. fuel rod piezoresistive weld clip head according to claim 2, it is characterised in that be equipped with interior spiral shell in the mounting hole
Line, the electric conductor (4) are equipped with the external screw thread being adapted.
4. fuel rod piezoresistive weld clip head according to claim 1, it is characterised in that the electric conductor (4) is installed on
The outside of the sheet metal (5), collet front end (31) and collet rear end (32).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711345548.XA CN107900504B (en) | 2017-12-14 | 2017-12-14 | Fuel rod pressure resistance welding chuck |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711345548.XA CN107900504B (en) | 2017-12-14 | 2017-12-14 | Fuel rod pressure resistance welding chuck |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107900504A true CN107900504A (en) | 2018-04-13 |
| CN107900504B CN107900504B (en) | 2019-12-31 |
Family
ID=61868975
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201711345548.XA Active CN107900504B (en) | 2017-12-14 | 2017-12-14 | Fuel rod pressure resistance welding chuck |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107900504B (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111185657A (en) * | 2020-01-14 | 2020-05-22 | 西华大学 | Cladding tube electrode and preparation method thereof |
| CN111724918A (en) * | 2020-06-29 | 2020-09-29 | 西安建筑科技大学 | Weak rigidity cladding pipe area upset power spin friction welding's joint |
| CN112756859A (en) * | 2020-12-30 | 2021-05-07 | 中核北方核燃料元件有限公司 | Method for confirming gap between end plug and inner welding seam of cladding tube |
| CN115116629A (en) * | 2022-05-11 | 2022-09-27 | 中国原子能科学研究院 | Annular fuel end plug, annular fuel assembly and welding method |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| RU2139176C1 (en) * | 1997-10-08 | 1999-10-10 | Открытое акционерное общество "Новосибирский завод химконцентратов" | Joint forming device at resistance butt-welding of pipe with plug |
| RU2286235C1 (en) * | 2005-05-23 | 2006-10-27 | Открытое акционерное общество "Новосибирский завод химконцентратов" | Method of manufacture of device for contact butt welding of pipe with plug |
| CN104520936A (en) * | 2012-04-17 | 2015-04-15 | 巴布科克和威尔科克斯M能量股份有限公司 | Resistance welding of an end cap for nuclear fuel rods |
| CN106735754A (en) * | 2016-12-13 | 2017-05-31 | 中核北方核燃料元件有限公司 | The welding method and welder of a kind of annular fuel element |
| CN107214405A (en) * | 2017-05-22 | 2017-09-29 | 彭州市长庆全成技术开发有限公司 | A kind of end plug chuck |
-
2017
- 2017-12-14 CN CN201711345548.XA patent/CN107900504B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| RU2139176C1 (en) * | 1997-10-08 | 1999-10-10 | Открытое акционерное общество "Новосибирский завод химконцентратов" | Joint forming device at resistance butt-welding of pipe with plug |
| RU2286235C1 (en) * | 2005-05-23 | 2006-10-27 | Открытое акционерное общество "Новосибирский завод химконцентратов" | Method of manufacture of device for contact butt welding of pipe with plug |
| CN104520936A (en) * | 2012-04-17 | 2015-04-15 | 巴布科克和威尔科克斯M能量股份有限公司 | Resistance welding of an end cap for nuclear fuel rods |
| CN106735754A (en) * | 2016-12-13 | 2017-05-31 | 中核北方核燃料元件有限公司 | The welding method and welder of a kind of annular fuel element |
| CN107214405A (en) * | 2017-05-22 | 2017-09-29 | 彭州市长庆全成技术开发有限公司 | A kind of end plug chuck |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111185657A (en) * | 2020-01-14 | 2020-05-22 | 西华大学 | Cladding tube electrode and preparation method thereof |
| CN111724918A (en) * | 2020-06-29 | 2020-09-29 | 西安建筑科技大学 | Weak rigidity cladding pipe area upset power spin friction welding's joint |
| CN112756859A (en) * | 2020-12-30 | 2021-05-07 | 中核北方核燃料元件有限公司 | Method for confirming gap between end plug and inner welding seam of cladding tube |
| CN115116629A (en) * | 2022-05-11 | 2022-09-27 | 中国原子能科学研究院 | Annular fuel end plug, annular fuel assembly and welding method |
| CN115116629B (en) * | 2022-05-11 | 2024-05-10 | 中国原子能科学研究院 | Annular fuel end plug, annular fuel assembly and welding method |
Also Published As
| Publication number | Publication date |
|---|---|
| CN107900504B (en) | 2019-12-31 |
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