CN102632101B - Nickel-titanium shape memory alloy composite pipe joint forming method - Google Patents
Nickel-titanium shape memory alloy composite pipe joint forming method Download PDFInfo
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- CN102632101B CN102632101B CN201210126157.XA CN201210126157A CN102632101B CN 102632101 B CN102632101 B CN 102632101B CN 201210126157 A CN201210126157 A CN 201210126157A CN 102632101 B CN102632101 B CN 102632101B
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- Prior art keywords
- pipe
- tube
- pipe joint
- shape memory
- pipes
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- HZEWFHLRYVTOIW-UHFFFAOYSA-N [Ti].[Ni] Chemical compound [Ti].[Ni] HZEWFHLRYVTOIW-UHFFFAOYSA-N 0.000 title claims abstract description 15
- 229910001000 nickel titanium Inorganic materials 0.000 title claims abstract description 15
- 239000002131 composite material Substances 0.000 title claims abstract description 6
- 238000000034 method Methods 0.000 title abstract description 11
- 229910001285 shape-memory alloy Inorganic materials 0.000 title abstract 6
- 229910045601 alloy Inorganic materials 0.000 claims description 47
- 239000000956 alloy Substances 0.000 claims description 47
- 229910000734 martensite Inorganic materials 0.000 claims description 11
- 238000004519 manufacturing process Methods 0.000 claims description 10
- 238000007493 shaping process Methods 0.000 claims description 9
- 230000009466 transformation Effects 0.000 claims description 7
- 239000000203 mixture Substances 0.000 claims description 6
- 238000010276 construction Methods 0.000 claims description 3
- 230000003446 memory effect Effects 0.000 claims description 3
- 230000008602 contraction Effects 0.000 claims description 2
- 230000006386 memory function Effects 0.000 claims description 2
- 230000003068 static effect Effects 0.000 claims description 2
- 150000001875 compounds Chemical class 0.000 abstract description 3
- 238000010438 heat treatment Methods 0.000 abstract description 3
- 230000007547 defect Effects 0.000 abstract 1
- 230000008569 process Effects 0.000 description 6
- 238000005516 engineering process Methods 0.000 description 4
- 230000000452 restraining effect Effects 0.000 description 3
- 241001234523 Velamen Species 0.000 description 2
- 230000008901 benefit Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000007246 mechanism Effects 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 238000002360 preparation method Methods 0.000 description 2
- 230000007704 transition Effects 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 230000009977 dual effect Effects 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L13/00—Non-disconnectible pipe-joints, e.g. soldered, adhesive or caulked joints
- F16L13/004—Shrunk pipe-joints
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23P—METAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
- B23P11/00—Connecting or disconnecting metal parts or objects by metal-working techniques not otherwise provided for
- B23P11/02—Connecting or disconnecting metal parts or objects by metal-working techniques not otherwise provided for by first expanding and then shrinking or vice versa, e.g. by using pressure fluids; by making force fits
- B23P11/025—Connecting or disconnecting metal parts or objects by metal-working techniques not otherwise provided for by first expanding and then shrinking or vice versa, e.g. by using pressure fluids; by making force fits by using heat or cold
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16B—DEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS OR WEDGES; JOINTS OR JOINTING
- F16B2200/00—Constructional details of connections not covered for in other groups of this subclass
- F16B2200/77—Use of a shape-memory material
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16B—DEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS OR WEDGES; JOINTS OR JOINTING
- F16B7/00—Connections of rods or tubes, e.g. of non-circular section, mutually, including resilient connections
- F16B7/04—Clamping or clipping connections
- F16B7/0406—Clamping or clipping connections for rods or tubes being coaxial
- F16B7/0426—Clamping or clipping connections for rods or tubes being coaxial for rods or for tubes without using the innerside thereof
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Non-Disconnectible Joints And Screw-Threaded Joints (AREA)
Abstract
The invention aims at providing a nickel-titanium shape memory alloy composite pipe joint forming method comprising the following steps of: assembling two layers of nickel-titanium shape memory pipes together in a way of clearance fit or interference fit to form a double-layer pipe, wherein the inner diameter d0 of the double-layer pipe is less than the outer diameter d2 of two pipes to be connected; performing expanding deformation on the double-layer pipe to enlarge the inner diameter of the double-layer pipe to d1 so as to compound and form the two layers of nickel-titanium shape memory pipes into a whole, wherein the d1 is more than the outer diameter d2 of the pipes to be connected; sheathing a pipe joint with the expanded diameter outside the two pipes to be connected; and recovering the shape of the pipe joint through low-temperature heating, and connecting the two pipes after the pipe joint is automatically contracted, thereby completing the forming of the pipe joint. The nickel-titanium shape memory alloy composite pipe joint forming method overcomes the defect that the wall of the conventional nickel-titanium shape memory alloy pipe joint is excessively thin or thick, and ensures the nickel-titanium shape memory alloy pipe joint to have enough fastening force and enough strength so as to enable the nickel-titanium shape memory alloy pipe joint to have excellent connection performance.
Description
Technical field
What the present invention relates to is a kind of pipe joint manufacturing process, the specifically pipe joint manufacturing process in pipe joint machine parts'precise manufacturing technology field.
Background technology
Niti-shaped memorial alloy is widely used at engineering field because having good SME and super-elasticity.The SME of marmem refers to and under a certain low-temperature phase, carries out plastic deformation, then is heated a certain temperature, and material undergoes phase transition and can return to the state before plastic deformation.Niti-shaped memorial alloy most typical application aspect SME is exactly marmem pipe joint.Niti-shaped memorial alloy pipe joint can be realized the connection of two pipelines, and this connected mode had both been different from rib machine tool and has connected, and was also different from welding.Niti-shaped memorial alloy pipe joint is in the time of application, the pipe joint that first internal diameter size is slightly less than to connected pipe external diameter carries out hole enlargement distortion under low-temperature phase, make its internal diameter be greater than the external diameter of connected pipe, under low-temperature condition, connected pipe and pipe joint are assembled together, and then the nickel-titanium shape memory pipe joint entirety assembling is heated to a certain temperature, niti-shaped memorial alloy pipe joint is undergone phase transition, its internal diameter size returns to the size before distortion because of SME, but owing to being subject to the restriction of connected pipe, it is produced to restraining force in the process of recovering in shape, thereby two connected pipes are closely connected together.All kinds of pipe joints of niti-shaped memorial alloy manufacture have reliability high, be difficult for occurring seepage, simple in structure, easy for installation and save the advantage such as assembly space, thereby be widely used in the field such as Aeronautics and Astronautics and boats and ships.But size design, Composition Design and the hole enlargement technology of niti-shaped memorial alloy pipe joint are all the key technologies in niti-shaped memorial alloy pipe joint design and manufacture process.Especially the wall thickness dimension of niti-shaped memorial alloy pipe joint is most important for the switching performance of pipe joint, wall thickness is too thin, the undercapacity of pipe joint, fastening force does not reach instructions for use, wall thickness is too thick, in pipe joint hole enlargement process, there is gradient deformation problems, be that very large distortion occurs inner layer metal, and there is less distortion in outer layer metal, this will affect the follow-up shape of niti-shaped memorial alloy pipe joint and recover, cause fastening force deficiency, therefore optimize the wall thickness dimension problem of niti-shaped memorial alloy pipe joint, it is the problem that engineering circles is endeavoured research always.
Summary of the invention
The object of the present invention is to provide in ensureing that niti-shaped memorial alloy pipe joint has enough fastening forces, there is again enough intensity, make niti-shaped memorial alloy pipe joint there is the niti-shaped memorial alloy multiunit tube joint manufacturing process of good switching performance.
The object of the present invention is achieved like this:
Niti-shaped memorial alloy multiunit tube joint manufacturing process of the present invention, is characterized in that:
(1) two-layer nickel-titanium shape memory pipe is assembled together to a bimetallic tube of composition in the mode of matched in clearance or interference fit, the inner diameter d 0 of this bimetallic tube is less than the outside diameter d 2 of two pipes to be connected;
(2) be out of shape and make bimetallic tube internal diameter increase to d1 by hole enlargement, two-layer nickel-titanium shape memory pipe combined shaping is integrated, and d1 is greater than the outside diameter d 2 of pipe to be connected;
(3) pipe joint that has expanded footpath is enclosed within to the outside of two pipes to be connected;
(4) by low-temperature heat, pipe joint generation shape is recovered, pipe joint after automatically shrinking links together two tubes, completes shaping.
Advantage of the present invention is:
1. niti-shaped memorial alloy multiunit tube joint can be avoided the Gradient Effect problem of individual layer heavy wall pipe joint and the undercapacity problem of individual layer thin-walled pipe joint, in keeping it to there is excellent in shape memory effect, restraining force can be by ectonexine pipe shared, distribution of force is even, keep higher intensity, improved service life.
2. the ectonexine pipe of niti-shaped memorial alloy multiunit tube joint can adopt different compositions and different phase structures according to actual needs, realizes being fastenedly connected connected tube by different deformation mechanisms.
3. niti-shaped memorial alloy multiunit tube joint can, by controlling different its recovery rate and restraining forces under different radial loaded hole enlargement amounts of wall ratio, heterogeneity and different magnitude of interference control, design comparatively flexible.
4. in the time adopting elastic fluid and liquid medium to carry out hole enlargement to niti-shaped memorial alloy multiunit tube joint, can disposablely realize combined shaping and the hole enlargement of niti-shaped memorial alloy multiunit tube joint.
Brief description of the drawings
Fig. 1 is niti-shaped memorial alloy multiunit tube joint structural representation of the present invention;
Fig. 2 is niti-shaped memorial alloy multiunit tube joint design principle of the present invention;
Fig. 3 is the implementing procedure schematic diagram of niti-shaped memorial alloy multiunit tube joint of the present invention.
Detailed description of the invention
For example the present invention is described in more detail below in conjunction with accompanying drawing:
In conjunction with Fig. 1～3, niti-shaped memorial alloy multiunit tube joint structure as shown in Figure 1, the manufacturing process of the niti-shaped memorial alloy multiunit tube joint that the present invention proposes is mainly SME and the super-elasticity of utilizing niti-shaped memorial alloy, and its concrete principle as shown in Figure 2.Niti-shaped memorial alloy multiunit tube joint is by two-layer niti-shaped memorial alloy pipe 2-1 and 2-2 is compound forms, this two-layer pipe can adopt different compositions and different phase structures according to actual needs, then utilizes the different deformation of two-layer pipe and phase conversion mechanism to realize fastening to the connection of connecting tube 1 and 3.First two-layer nickel-titanium shape memory pipe 2-1 and 2-2 are assembled together to a bimetallic tube 2 of composition in the mode of matched in clearance or interference fit, the inner diameter d 0 of this bimetallic tube 2 is less than the outside diameter d 2 of two pipes 1 and 3 to be connected, so that it occurs to be unlikely completely and to recover when shape is recovered in the back, make the interior also residual certain prestressing force of pipe joint, so just can play a fastening effect; Then be out of shape and make niti-shaped memorial alloy multiunit tube joint internal diameter increase to d1 by hole enlargement, this size should be greater than the outside diameter d 2 of pipe 1 and 3 to be connected, so just, can successfully niti-shaped memorial alloy multiunit tube joint 2 be enclosed within to the outside of two velamen tube connectors 1 and 3, hole enlargement distortion can also make to be integrated with niti-shaped memorial alloy pipe 2-1 and the 2-2 combined shaping of gap fiting mode assembling in addition.In the time that ectonexine pipe all adopts martensitic structure, all can there is martensite detwinning or reorientation distortion in the inside and outside two-layer pipe after hole enlargement.It is connected with connected tube and after low-temperature heat two-layer pipe all can there is reverse transformation and all be transformed into austenitic structure, so just can all recover to the d0 before hole enlargement because shape memory function makes its internal diameter size.But because the outside diameter d 2 of connected tube is greater than d0, the size of pipe joint can not be recovered completely because being subject to the constraint of connecting tube, its residualinternal stress will act on the outer wall of two velamen tube connectors, thereby realize, the constraint of connected tube is connected, and reaches dual fastening object.Be martensite, outer tube while being austenitic composite construction when adopting inner tube, after hole enlargement will there is martensite detwinning or reorientation is out of shape in inner tube, and outer tube is due to the hyperelastic deformation of stress-induced martensite phase transformation occurring in austenitic state.It is connected with connected tube and after low-temperature heat inner tube be transformed into austenitic structure because there is reverse transformation, its internal diameter size recovers to the d0 before hole enlargement under shape memory effect.But because the outside diameter d 2 of connected tube is greater than d0, make the size of pipe joint be subject to equally the constraint of connecting tube and can not recover completely, its residualinternal stress can act on the outer wall of connected tube, thereby realize, the constraint of two pipes is connected, and outer tube is because having super-elasticity along with the contraction of inner tube is shunk, can apply elastic stress to inner tube so loose to prevent its stressed rear generation.
Enforcement of the present invention is divided into double teacher, connection and the heating of niti-shaped memorial alloy multiunit tube joint of hole enlargement, niti-shaped memorial alloy multiunit tube joint that is combined shaping, the niti-shaped memorial alloy multiunit tube joint of preparation, the niti-shaped memorial alloy multiunit tube joint of the original pipe of niti-shaped memorial alloy multiunit tube joint is fastening, as shown in Figure 3.
The preparation of the original pipe of niti-shaped memorial alloy multiunit tube joint: process respectively the original pipe 2-1 of ectonexine and the 2-2 of niti-shaped memorial alloy multiunit tube joint by machining process, ensure that the internal diameter size of inner tube is less than the external diameter of two pipes to be connected.Surface quality and the dimensional accuracy that in process, will note the original pipe of ectonexine, ensure certain magnitude of interference, is pressed into outer tube 2-1 for the ease of inner tube 2-2, and the two ends of inner tube 2-2 need process a little chamfering.
The combined shaping of niti-shaped memorial alloy multiunit tube joint: after pipe machines, by mechanical pressure, inner tube 2-2 is pressed into outer tube 2-1, realize the combined shaping of niti-shaped memorial alloy multiunit tube joint, the pipe joint 2 after compound can use as an one-piece parts.
The hole enlargement of niti-shaped memorial alloy multiunit tube joint: adopt the mode of machinery expanding or static loading hole enlargement to carry out hole enlargement to niti-shaped memorial alloy multiunit tube joint 2; After making pipe joint 2 that deformation to a certain degree and phase transformation occur, internal diameter size reaches d1, and this size is greater than the external diameter of two pipes 1 and 3 to be connected.After hole enlargement, can make the multiunit tube joint that the original magnitude of interference is inadequate also can be combined with each other well.
The connection of niti-shaped memorial alloy multiunit tube joint: because the internal diameter of the pipe joint 2 after hole enlargement is greater than the external diameter of two pipes to be connected, at this moment can successfully the pipe joint 2 that has expanded footpath be enclosed within to the outside of two pipes 1 and 3 to be connected.
The heating of niti-shaped memorial alloy multiunit tube joint is fastening: finally make pipe joint 2 that shape occur by low-temperature heat again and recover, pipe joint 2 just can closely link together two tubes 1 and 3 after automatically shrinking.
So just complete the connection procedure of niti-shaped memorial alloy multiunit tube joint.
Claims (1)
1. niti-shaped memorial alloy multiunit tube joint manufacturing process, is characterized in that:
(1) two-layer nickel-titanium shape memory pipe is assembled together to a bimetallic tube of composition in the mode of matched in clearance or interference fit, the inner diameter d 0 of this bimetallic tube is less than the outside diameter d 2 of two pipes to be connected;
(2) be out of shape and make bimetallic tube internal diameter increase to d1 by hole enlargement, two-layer nickel-titanium shape memory pipe combined shaping is integrated, and d1 is greater than the outside diameter d 2 of pipe to be connected;
(3) pipe joint that has expanded footpath is enclosed within to the outside of two pipes to be connected;
(4) by low-temperature heat, pipe joint generation shape is recovered, pipe joint after automatically shrinking links together two tubes, completes shaping;
Described two-layer nickel-titanium shape memory pipe comprises that it is that martensite, outer tube are two kinds of combinations of austenitic composite construction that ectonexine pipe all adopts martensitic structure and inner tube;
In the time that ectonexine pipe all adopts martensitic structure, bimetallic tube after hole enlargement distortion is connected with pipe to be connected and after low-temperature heat, all there is reverse transformation and be all transformed into austenitic structure in ectonexine pipe, ectonexine pipe all recovers its internal diameter size by shape memory function to the d0 before hole enlargement, because the outside diameter d 2 of pipe to be connected is greater than d0, bimetallic tube can not be recovered completely because being subject to the constraint of connecting tube, its residualinternal stress acts on the outer wall of two pipes to be connected, thereby realizes the constraint connection for the treatment of tube connector;
Be martensite when ectonexine pipe adopts inner tube, when outer tube is austenitic composite construction, after bimetallic tube hole enlargement distortion, inner tube generation martensite detwinning or reorientation distortion, the hyperelastic deformation of outer tube generation stress-induced martensite phase transformation, by the bimetallic tube after hole enlargement distortion be connected until adapter and after low-temperature heat, inner tube is transformed into austenitic structure because there is reverse transformation, inner tube internal diameter size recovers to the d0 before hole enlargement under shape memory effect, because the outside diameter d 2 of pipe to be connected is greater than d0, make inner tube be subject to the constraint of pipe to be connected and can not recover completely, its residualinternal stress acts on the outer wall of pipe to be connected, thereby realize, the constraint of two pipes to be connected is connected, outer tube is shunk along with the contraction of inner tube, thereby inner tube is applied to elastic stress,
The two ends of the inner tube of bimetallic tube are processed with chamfering; Adopt machinery expanding or static loading hole enlargement to carry out hole enlargement to bimetallic tube.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210126157.XA CN102632101B (en) | 2012-04-26 | 2012-04-26 | Nickel-titanium shape memory alloy composite pipe joint forming method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210126157.XA CN102632101B (en) | 2012-04-26 | 2012-04-26 | Nickel-titanium shape memory alloy composite pipe joint forming method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102632101A CN102632101A (en) | 2012-08-15 |
| CN102632101B true CN102632101B (en) | 2014-08-20 |
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| CN201210126157.XA Expired - Fee Related CN102632101B (en) | 2012-04-26 | 2012-04-26 | Nickel-titanium shape memory alloy composite pipe joint forming method |
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| CN (1) | CN102632101B (en) |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105666037A (en) * | 2014-11-17 | 2016-06-15 | 昌河飞机工业（集团）有限责任公司 | Assembly method of shape memory alloy pipe connector used for aircraft hydraulic system |
| CN106065948A (en) * | 2016-08-23 | 2016-11-02 | 中国工程物理研究院电子工程研究所 | A kind of memorial alloy ring seal device |
| CN108941243B (en) * | 2018-06-26 | 2020-06-16 | 哈尔滨工程大学 | Method for manufacturing iron-based/nickel titanium-based shape memory alloy composite pipe |
| CN111151756B (en) * | 2020-01-20 | 2021-12-03 | 广东省科学院新材料研究所 | 4D printing rapid manufacturing method of shape memory alloy pipe joint and product |
| CN114001218A (en) * | 2021-09-10 | 2022-02-01 | 清华大学 | Pipe connection member and water feed-in device of vacuum cavity |
| CN118709322A (en) * | 2024-08-27 | 2024-09-27 | 成都飞机工业（集团）有限责任公司 | Memory alloy pipeline connecting piece design method based on radial shrinkage stress model |
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|---|---|---|---|---|
| EP0470902A1 (en) * | 1990-08-06 | 1992-02-12 | The Furukawa Electric Co., Ltd. | Liner for pipe joint by use of shape memory alloy |
| CN2596155Y (en) * | 2003-01-29 | 2003-12-31 | 中国科学院金属研究所 | Marmem pipe joint |
| CN201259028Y (en) * | 2008-09-01 | 2009-06-17 | 北京有色金属研究总院 | Shape memory alloy pipe joint for pipeline fastening connection |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0419487A (en) * | 1990-05-15 | 1992-01-23 | Furukawa Electric Co Ltd:The | Shape memory alloy pipe joint |
| JPH04272593A (en) * | 1991-02-28 | 1992-09-29 | Toshiba Corp | Structure for connecting piping |
| JP3410814B2 (en) * | 1994-05-19 | 2003-05-26 | 株式会社東芝 | Different diameter pipe joint device |
| JPH08178140A (en) * | 1994-12-28 | 1996-07-12 | Matsushita Electric Ind Co Ltd | Shape memory alloy joint |
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2012
- 2012-04-26 CN CN201210126157.XA patent/CN102632101B/en not_active Expired - Fee Related
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0470902A1 (en) * | 1990-08-06 | 1992-02-12 | The Furukawa Electric Co., Ltd. | Liner for pipe joint by use of shape memory alloy |
| CN2596155Y (en) * | 2003-01-29 | 2003-12-31 | 中国科学院金属研究所 | Marmem pipe joint |
| CN201259028Y (en) * | 2008-09-01 | 2009-06-17 | 北京有色金属研究总院 | Shape memory alloy pipe joint for pipeline fastening connection |
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| Title |
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| CN102632101A (en) | 2012-08-15 |
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Granted publication date: 20140820 Termination date: 20200426 |