CN108149065A - A kind of Ti base marmems rivet fastener and its manufacturing method - Google Patents
A kind of Ti base marmems rivet fastener and its manufacturing method Download PDFInfo
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- CN108149065A CN108149065A CN201711405819.6A CN201711405819A CN108149065A CN 108149065 A CN108149065 A CN 108149065A CN 201711405819 A CN201711405819 A CN 201711405819A CN 108149065 A CN108149065 A CN 108149065A
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- 238000004519 manufacturing process Methods 0.000 title claims abstract description 68
- 238000000034 method Methods 0.000 claims abstract description 60
- 230000008569 process Effects 0.000 claims abstract description 40
- 238000005520 cutting process Methods 0.000 claims abstract description 11
- 230000000694 effects Effects 0.000 claims abstract description 11
- 239000000956 alloy Substances 0.000 claims description 38
- 229910045601 alloy Inorganic materials 0.000 claims description 37
- 238000013461 design Methods 0.000 claims description 20
- 238000012545 processing Methods 0.000 claims description 15
- 238000000137 annealing Methods 0.000 claims description 9
- 239000002994 raw material Substances 0.000 claims description 8
- 229910052758 niobium Inorganic materials 0.000 claims description 7
- 238000011282 treatment Methods 0.000 claims description 7
- 238000002844 melting Methods 0.000 claims description 6
- 230000008018 melting Effects 0.000 claims description 6
- 239000000203 mixture Substances 0.000 claims description 6
- 238000004381 surface treatment Methods 0.000 claims description 6
- 239000000463 material Substances 0.000 claims description 4
- 230000015654 memory Effects 0.000 claims description 4
- 238000005498 polishing Methods 0.000 claims description 4
- 238000004321 preservation Methods 0.000 claims description 4
- 238000005275 alloying Methods 0.000 claims description 3
- 210000000080 chela (arthropods) Anatomy 0.000 claims description 3
- 238000010891 electric arc Methods 0.000 claims description 3
- 238000005242 forging Methods 0.000 claims description 3
- 238000000265 homogenisation Methods 0.000 claims description 3
- 238000003801 milling Methods 0.000 claims description 3
- 238000010791 quenching Methods 0.000 claims description 3
- 230000000171 quenching effect Effects 0.000 claims description 3
- PMTRSEDNJGMXLN-UHFFFAOYSA-N titanium zirconium Chemical compound [Ti].[Zr] PMTRSEDNJGMXLN-UHFFFAOYSA-N 0.000 claims description 3
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims description 2
- 229910001182 Mo alloy Inorganic materials 0.000 claims description 2
- 229910011214 Ti—Mo Inorganic materials 0.000 claims description 2
- 229910002056 binary alloy Inorganic materials 0.000 claims description 2
- 238000011084 recovery Methods 0.000 claims description 2
- 229910002058 ternary alloy Inorganic materials 0.000 claims description 2
- 229910002059 quaternary alloy Inorganic materials 0.000 claims 1
- 229910052715 tantalum Inorganic materials 0.000 claims 1
- 238000010438 heat treatment Methods 0.000 abstract description 6
- 238000001125 extrusion Methods 0.000 abstract description 2
- 229910001000 nickel titanium Inorganic materials 0.000 description 9
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 6
- 229910001285 shape-memory alloy Inorganic materials 0.000 description 6
- 238000010586 diagram Methods 0.000 description 5
- 238000005516 engineering process Methods 0.000 description 4
- 238000003754 machining Methods 0.000 description 4
- 239000007788 liquid Substances 0.000 description 3
- 229910000734 martensite Inorganic materials 0.000 description 3
- 229910052757 nitrogen Inorganic materials 0.000 description 3
- 230000009466 transformation Effects 0.000 description 3
- 230000007704 transition Effects 0.000 description 3
- 229910000905 alloy phase Inorganic materials 0.000 description 2
- 238000010276 construction Methods 0.000 description 2
- 230000003446 memory effect Effects 0.000 description 2
- 238000002360 preparation method Methods 0.000 description 2
- -1 -196 DEG C) Chemical compound 0.000 description 1
- 208000037656 Respiratory Sounds Diseases 0.000 description 1
- 238000010923 batch production Methods 0.000 description 1
- 238000005266 casting Methods 0.000 description 1
- 238000005097 cold rolling Methods 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 235000019441 ethanol Nutrition 0.000 description 1
- 125000005909 ethyl alcohol group Chemical group 0.000 description 1
- 239000002828 fuel tank Substances 0.000 description 1
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- 230000008961 swelling Effects 0.000 description 1
- 238000000844 transformation Methods 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C14/00—Alloys based on titanium
-
- 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
- B23P15/00—Making specific metal objects by operations not covered by a single other subclass or a group in this subclass
-
- 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
- F16B19/00—Bolts without screw-thread; Pins, including deformable elements; Rivets
- F16B19/04—Rivets; Spigots or the like fastened by riveting
Abstract
The present invention provides a kind of Ti base marmems rivet fastener and its manufacturing method, which is prepared using Ti base marmems, and shape is designed as symmetrical structure, and both ends are rivet round end or countersunk head, symmetrical configuration Center raised points.2 4% deformation are generated by midplane extrusion in production and technique, then obtain rivet finished product along cutting in the middle part of each raised points, original shape is replied by heating in connecting portion and plays good fastening effect.By designing specific stretching device progress consistent stretching in series or in parallel, cutting the rivet product after manufacture obtains identical uniformly pre- deformation process.The manufacturing method of the present invention is easy, efficient, reliable, is with a wide range of applications.
Description
Technical field
The invention belongs to connector technical field, more particularly to a kind of marmem rivet fastener and its simplicity,
Reliably, mass manufacturing method.
Background technology
Traditional rivet fastener generally use interference engagement mode, which connects, mitigates construction weight and significantly extending structure service life.
But for conventional fastener, when interference engagement, is attached using the method for forcing installation, is typically due to each portion of fastener
Position plastic deformation is uneven to cause it Radial Rotation Error swelling occur in restoring, and hole wall crackle is easily caused to connecting component
Damage.Marmem shape adjoint in the phase transition process that heats up reverts to homogeneous deformation, can restore original shape completely
Shape, therefore to solve the problems, such as heterogeneous deformation caused by traditional rivet fastener connection, it is new using marmem manufacture
Snap riveting nail fastener.
The more mature marmem fastener material of application is mainly NiTi based alloys at present.NiTi bases shape is remembered
Alloy is recalled with excellent shape memory effect, made fastener at home and abroad industries such as Aeronautics and Astronautics, automobile and bridge
It is used widely.Especially need to produce using a large amount of rivetings in assembling process in aerospace field, aircraft and all kinds of aircrafts
On the one hand product meet the harsh use environment of aerospace, on the other hand ensure overall structure lightweight and reliability.Such as
NiTiFe memorial alloy hydraulic airs pipe joint has obtained largely should on the Multiple Types aircraft such as F14, F18 and the B2 in the U.S.
With the close interferometric shape of oil made of NiTiCo memorial alloys remembers rivet, is widely used in the wing for destroying seven, F-8 fighter
On fuel tank.Patent of invention CN201310525180.0, which is described, utilizes fastener between a kind of marmem rivet and ontology
It is heated to restore original-shape, the structure of interference engagement is generated, but marmem fastener is smooth rod-shaped, loading in design
Deformation process difficulty is larger.Patent of invention CN201080055244.X uses the self-expanding feature of NiTi base marmems,
Occur to force plastic deformation in the connector aperture to contact with each other, so as to generate radial load and fastening connection piece.Due to fastening
Requirement and NiTi base memorial alloy Phase Transformation Characteristic limitation of the part machining deformation to environment temperature, deformation and preservation are needed low
It is carried out under warm environment (liquid nitrogen such as -196 DEG C), causes to manufacture, preserve and use cost is high, operational sequence is cumbersome.
Ti base marmems are a kind of Novel memory alloy materials developed in recent years, have good mechanical performance
(tensile strength 700MPa) and shape memory effect (4%) disclosure satisfy that rivet manufactures requirement, and compare traditional NiTi
Based alloy has many advantages, such as that low-density (about the 70~80% of NiTi based alloys), use temperature range are wide (- 100~200 DEG C).
At the same time, Ti base memorial alloy phase transition temperatures are generally greater than room temperature, and its parent phase stability is high, and working environment drops after deformation
It is low martensite transfor mation to occur and with high intensity, cryogenic relaxation phenomenon will not occur.So Ti base marmems are tight
Firmware can complete deformation under room temperature environment (without low temperature environment), preserve, and can especially expire in fields such as aerospaces
The requirement used safely in the range of sufficient different temperatures is capable of the manufacture of high degree reduction marmem fastener, is preserved
And use cost.The Ti base memorial alloys mainly alloy systems such as including Ti-Nb, Ti-Zr and Ti-Ta, such as Ti-Zr-Nb-Fe conjunctions
Golden (such as CN201710046448.0) has high transformation temperature (150 DEG C of As ＞), is used as raw material manufacture fastener
When, deformation can be processed under room temperature environment, and preserved for a long time under room temperature environment, and the product that such alloy makes
It can stablize.
Conventional shape-memory alloy rivet fastener (such as liquid nitrogen) need to make at low ambient temperatures to generate interference engagement effect
It pre- deformation process is carried out to produced rivet finished product and is preserved with preceding, it is made to meet the requirement of connector aperture, therefore in processing work
Mass processing is difficult to realize in terms of skill, and a large amount of low-temperature treatment equipment is needed to support, substantially increases such rivet
Production, preservation and use cost.
Meanwhile the prior art is also limited to the manufacturing method of marmem rivet the manufacturer of traditional rivet
Method, such as traditional preparation methods such as pier system, cold rollings.However there are high expensives for such manufacturing method, equipment is complicated, and machining accuracy is not
The deficiencies of controllable.Therefore, the manufacturing method also simplified there is an urgent need for developing a kind of low production cost, efficient, equipment and technological process.
Invention content
The present invention is in conventional shape-memory alloy rivet fastener products characteristics and its production, pre- deformation process
The cost problem of technique and production process provides a kind of Ti base marmems rivet fastener and its manufacturing method.
The present invention manufactures rivet fastener using Ti base marmems, can realize the manufacture of product under room temperature
And it preserves, and fastener has excellent properties stability and reliability after the completion of riveting, effectively reduces production and use cost.It should
Rivet product is lower (about the 70~80% of NiTi based alloys) relative to conventional shape-memory alloy rivet density, is conducive to drop
The construction weight of low connection system.By the method can efficiently, the rivet fastener product of low cost manufacturing excellent properties, solution
The problem of certainly marmem rivet low temperature process deformation difficulty is big, ensures properties of product consistency and reliability.
The technical solution of Ti base marmems manufacture rivet fastener provided by the invention is as follows：
A kind of Ti base marmems rivet fastener, it is characterised in that：The rivet is closed by Ti base shape memories
There is the marmem rivet that can play the role of fastening connection piece of certain shape made of golden.
In a preferred embodiment, the Ti base marmems include but are not limited to Ti-Zr, Ti-Mo,
Ti-Nb, Ti-Ta binary alloy system, Ti-Zr-Nb, Ti-Nb-Mo ternary alloy system and above-mentioned alloy system developed novel four
First alloy system.
In a preferred embodiment, the Ti base marmems include but are not limited to Ti- (20-30)
Zr、Ti‐(20‐30)Mo、Ti‐(20‐30)Nb、Ti‐(20‐30)Ta、Ti‐(20‐30)Zr‐(5‐10)Nb、Ti‐(20‐30)Nb‐
(5-10) Mo alloy systems.
In a preferred embodiment, the tail portion for designing the rivet fastener is raised structures, in room temperature tensile
Its size, which meets, after processing enters the requirement of riveting location aperture, assembles and after heated recovery original shape, raised structures and company
Fitting end face, which is in contact, plays fastening effect.
The present invention also provides a kind of manufacturing processes of Ti base marmems rivet fastener, and specific technical solution is such as
Under：
A kind of manufacturing method of Ti base marmems rivet fastener, comprises the steps of：
1st, alloy melting：Alloy raw material used is high-purity Ti (purity >=99.99%), high-purity Zr (purity >=99.99%)
And other high-purity alloy raw materials, alloy cast ingot is obtained using vacuum non-consumable electric arc melting mode, passes through 1000 DEG C -1500
DEG C temperature carries out Homogenization Treatments in 12-24 hours, ensures alloying component uniformity；
2nd, alloy forging and drawing：Alloy cast ingot is forged in 900 DEG C of -950 DEG C of conditions to obtain certain size square billet, and then
A diameter of 10-100mm sizes alloy bar material is obtained by drawing process；
3rd, it is machined：By Ti base marmem bars, by vehicle, pincers, milling, plane, grind more than one machinery and add
Work forming method produces the strip-shaped product for obtaining symmetrical structure, both ends are rivet round end or countersunk head, a diameter of 10- of extension
50mm, tip diameter 15-80mm, symmetrical configuration Center raised points, the position cross-sectional diameter are 12-60mm；
4th, it makes annealing treatment：The strip-shaped product is carried out to vacuum heat-preserving processing in 2-10 hours in the range of 600-1000 DEG C,
Rivet annealing process is then completed by quenching process, eliminate mechanical processing residual stress and product phase composition is made to be room temperature
Martensitic phase；
5th, it is surface-treated：Product carries out mechanical polishing removal surface working process trace after annealing, and polishes smooth；With
The product after surface treatment is put into 25-40 DEG C of absolute ethyl alcohol afterwards and be cleaned by ultrasonic until taking out after any surface finish is pollution-free
It dries, obtains clean products；
6th, deformation pre-processes：By the product after the surface treatment as carrying out shape in specific stretching device under room temperature environment
Variable is the homogeneous deformation of 2-4%, its extension diameter is made to meet the requirement of connection aperture, then along symmetrical cutting in the middle part of protruding point
Obtain single rivet finished product.
In a preferred embodiment, the strip-shaped product is symmetrical structure, and both ends are rivet round end or countersunk head, are stretched
Long sections of straight diameter is 20-40mm, and tip diameter 30-70mm, symmetrical configuration Center raised points, which is
40‐60mm；(2) it prepares in production technology and deformation is generated by midplane extrusion, then obtain rivet along cutting in the middle part of each raised points
Finished product.
In a preferred embodiment, the strip-shaped product is symmetrical structure, and both ends are rivet round end or countersunk head, are stretched
Long sections of straight diameter is 25mm, and tip diameter 60mm, symmetrical configuration Center raised points, which is 35mm；
In a preferred embodiment, the shape pretreatment can be carried out by designing specific stretching device
Series connection and/or consistent stretching in parallel, cutting manufacture obtain the rivet product after identical uniformly pre- deformation process.
This method is different from the manufacturing method of conventional shape-memory alloy rivet, passes through mold batch under previous process conditions
It is low to manufacture rivet finished product efficiency, and there are problems that not putting forth effort that rivet is caused to manufacture process for using in low-temperature deformation processing procedure
It is complicated.The present invention using elder generation deformation, cut afterwards by the way of obtain rivet product, convenient for pre- deformation process, by designed letter
Stretching under the easy certain load of device, highly effective and reliably manufacture rivet finished product, high degree reduces processing cost.
The technique effect that the present invention can obtain compared with prior art has：
1st, the present invention manufactures rivet fastener using Ti base marmems, and phase transition temperature is higher than room temperature, Ke Yishi
Now production and preservation under room temperature without cryogenic conditions (such as liquid nitrogen environment), reduces product manufacturing processing cost；
2nd, the present invention manufactures rivet fastener using Ti base marmems, is closed relative to traditional NiTi base shape memories
Golden product, the rivet product have lower density (NiTi alloy densities 6.5g/cm3, Ti based alloy density 5.3g/cm3), energy
The enough weight for further mitigating connection structure；
3rd, the present invention manufactures rivet fastener using Ti base marmems, which, which completes to be heated, restores stepmother
Mutually there is high intensity and stability, improve connection reliability and service life；
4th, using manufacturing method of the present invention can efficiently, low cost manufacturing same size marmem rivet product,
The unique manufacturing procedure of design solves the problems, such as that marmem rivet low temperature process deformation difficulty is big, simplifies manufacture production stream
Journey；
5th, can ensure the rivet product size consistency of same batch production using manufacturing method of the present invention, improve rivet into
Product rate and use reliability；
6th, manufacturing method of the present invention is convenient, fast, can realize miniaturization operation, can be promoted the use of in various fields.
Description of the drawings：
It in order to illustrate the embodiments of the present invention more clearly and technical solution, will be to needed in embodiment or description of the prior art
Attached drawing to be used is briefly described, it should be apparent that, the accompanying drawings in the following description is some embodiments of the present invention, for
For those of ordinary skill in the art, without having to pay creative labor, it can also be obtained according to these attached drawings
His attached drawing is the protection domain of patent of the present invention.
Fig. 1 is rivet fastener product structure and manufacturing method schematic diagram.
Fig. 2 assembles using process diagram for rivet fastener.
Fig. 3 is consistent connect stretching two and above rivet product structure and manufacturing method schematic diagram (wherein n >=2, expression
The design includes two and above product structure).
Fig. 4 for it is consistent in parallel stretch two and above rivet product structure and manufacturing method schematic diagram (wherein n >=2, m >=
2, represent that the design includes two and above product structure).
Specific embodiment
Specific embodiment part provides the detailed embodiment of the present invention.However, disclosed embodiment is only
The example of the present invention, can be embodied with various alternative forms.Therefore, in specific structure and the not purport of details functionally
It is being limited, they provide the foundation of claim and are used to instruct art technology as representational foundation
Personnel's various aspects implement the present invention.
Fig. 1 (a) shows the rod-shaped objects of manufactured rivet fastener, and Fig. 1 (b) shows deformation pretreatment and user
Method.Product is symmetrical structure, and both ends are rivet round end or countersunk head, and extension diameter d1 is 10-50mm, and tip diameter d2 is 15-
80mm；Symmetrical configuration Center protruding point, position cross-sectional diameter d3 are 12-60mm, and position 4 stretches dress for specific end
It puts.
The specifically used process of rivet product as shown in Fig. 2, rivet product (a) initial diameter be D, in room temperature environment will
Rivet, which is placed in stretching device, carries out homogeneous deformation, and tip position causes the length of rivet to increase as impetus is stretched, and transversal half
Diameter is reduced to d, then rivet finished product is obtained along symmetrical cutting in the middle part of protruding point, as shown in Fig. 2 (b), you can in specific operation item
It is riveted under part.Size restoration then occurs in connecting portion by heating rivet as shown in Fig. 2 (c), and then plays interference
Cooperation riveting fastening effect.
Fig. 3 show manufacture two and above product cascaded structure, each position design structure size and phase in embodiment 1
With (wherein n >=2 represent that the design includes two and above product structure).To ensure to use preceding pre- deformation process uniformity
Property, series connection rivet symmetrical structure number can be designed according to concrete application conditions.Fig. 3 infrastructure products are placed in specific stretching device
Middle carry out homogeneous deformation then obtains rivet finished product, you can in spy along symmetrical cutting in the middle part of each product protruding point middle part and end
Determine to be riveted under working condition, and pass through heating and restore to play interference fit riveting fastening effect.
Method shown in Fig. 3 can design two and above product cascaded structure, can be good during production and use
Ensure deformation uniformity consistency well, be greatly saved manufacture cost.Under different use conditions and amount of interference, it must ensure to stretch link
Product cascaded structure number is set on the basis of uniformity, and otherwise pre- deformation process will cause product size deviation, structure occur
Same requirement can not be met.
Method as shown in Figure 4 manufactures two and figure 3 above structure parallel connection drawn products, each symmetrical section Position Design
With Fig. 3 for consistent connect stretching two and above rivet product (wherein n >=2, m >=2, represent the design including two and more than
Product structure).To ensure to use preceding pre- deformation process uniformity consistency, series, parallel can be designed according to concrete application conditions
Rivet symmetrical structure number in Fig. 1.
Fig. 4 infrastructure products are placed in specific stretching device and carry out homogeneous deformation, then along each symmetrical section protruding point middle part
And symmetrical cutting obtains rivet finished product in the middle part of end, you can is riveted under the conditions of specific operation, and passes through heating and restore
To interference fit riveting fastening effect.
The consistent multiple products of stretching in parallel can be designed in scheme shown in Fig. 4, it need to be in parallel according to specifically used requirement design
Stretching device to ensure to ensure deformation uniformity consistency during production and use, is greatly saved manufacture cost.Note
It anticipates under different use conditions and amount of interference, structure number in series, parallel Fig. 1 must be set on the basis of stretching link uniformity is ensured
Mesh, otherwise pre- deformation process product size will be caused deviation occur, structure can not meet same requirement.
Present contribution to the art is protruded below by specific embodiment.
Embodiment 1
The composition of Ti base marmem rivets is Ti- (20-30) Zr.
Its manufacturing method is as follows：
1st, alloy melting：According to alloy form proportioning, selection in right amount than the high-purity Ti of content (purity >=99.99%),
High-purity Zr (purity >=99.99%) and other high-purity alloy raw materials are closed using vacuum non-consumable electric arc melting mode
Golden ingot casting carries out Homogenization Treatments in 14 hours by 1000 DEG C of temperatures, ensures alloying component uniformity；
2nd, alloy forging and drawing：Alloy cast ingot is forged to obtain certain size square billet, and then pass through drawing in 920 DEG C of conditions
It pulls out technique and obtains a diameter of 80mm sizes alloy bar material；
3rd, it is machined：By Ti base marmem bars, by vehicle, pincers, milling, plane, grind more than one machinery and add
Work forming method produces to obtain symmetrical structure as shown in Fig. 1 (a), both ends are rivet round end or the strip-shaped product of countersunk head, elongation
The a diameter of 25mm of section, tip diameter 60mm, symmetrical configuration Center raised points, which is 35mm；
4th, it makes annealing treatment：The strip-shaped product in the range of 800 DEG C is carried out to vacuum heat-preserving processing in 2 hours, is then passed through
Quenching process completes rivet annealing process, eliminates mechanical processing residual stress and product phase composition is made to be room temperature martensite
Phase；
5th, it is surface-treated：Product carries out mechanical polishing removal surface working process trace after annealing, and polishes smooth；With
The product after surface treatment is put into 25 DEG C of absolute ethyl alcohols afterwards be cleaned by ultrasonic until taking out after any surface finish is pollution-free and is dried in the air
It is dry, obtain clean products；
6th, deformation pre-processes：By the product after the surface treatment as carrying out shape in specific stretching device under room temperature environment
Variable is 2% homogeneous deformation, its extension diameter is made to meet the requirement of connection aperture, is then symmetrically cut along in the middle part of protruding point
To single rivet finished product.
Embodiment 2
Ti base marmems rivet composition is Ti-35Mo.
Its manufacturing method is identical with 1 manufacturing method of embodiment, and difference lies in show manufacture two according to Fig. 3 and produce above
Product cascaded structure, each position design structure size it is in the same manner as in Example 1 (wherein n >=2, represent the design include two and
More than product structure).To ensure to use preceding pre- deformation process uniformity consistency, series connection riveting can be designed according to concrete application conditions
Follow closely symmetrical structure number.
It is identical with 1 manufacturing method of embodiment, Fig. 3 infrastructure products are placed in specific stretching device and carry out homogeneous deformation, with
Rivet finished product is obtained along symmetrical cutting in the middle part of each product protruding point middle part and end, you can riveting is carried out under the conditions of specific operation afterwards
It connects, and passes through heating and restore to play interference fit riveting fastening effect.
Rivet fastener described in the present embodiment manufactures raw material and method is consistent with 1-2,4-5 step in embodiment 1, herein
It is not described.In step 3, infrastructure product as shown in Figure 3 is obtained by machining process, step 6 is needed in addition along product
Symmetrical centre is equally cut in the middle part of end.Polishing, finally obtains same batch rivet product.
Embodiment 3
Ti base marmems rivet composition is Ti-20Zr-5Nb.
Its manufacturing method is identical with the preparation method of embodiment 2, according to 2 design concept of embodiment, is manufactured as shown in Figure 4
Two and figure 3 above structure parallel connection drawn products, each symmetrical section Position Design is in the same manner as in Example 1, and Fig. 3 is consistent series connection
Stretch two and above rivet product structure and manufacturing method schematic diagram (wherein n >=2, m >=2, represent the design include two and
More than product structure).To ensure to use preceding pre- deformation process uniformity consistency, can be connected according to concrete application conditions design,
Rivet symmetrical structure number in parallel embodiment 1.
It is identical with 1 application method of embodiment, Fig. 4 infrastructure products are placed in specific stretching device and carry out homogeneous deformation, with
Rivet finished product is obtained along symmetrical cutting in the middle part of each symmetrical section protruding point middle part and end, you can carried out under the conditions of specific operation afterwards
Riveting, and pass through heating and restore to play interference fit riveting fastening effect.
The consistent multiple products of stretching in parallel are designed in the embodiment, need to be filled according to specifically used in parallel stretch of requirement design
It puts, to ensure to ensure deformation uniformity consistency during production and use, is greatly saved manufacture cost.Pay attention to difference
Under use condition and amount of interference, structure number in series, parallel embodiment 1 must be set on the basis of stretching link uniformity is ensured
Mesh, otherwise pre- deformation process product size will be caused deviation occur, structure can not meet same requirement.
Rivet fastener described in the present embodiment manufactures raw material and method is consistent with 1-2,4-6 step in embodiment 2, herein
It is not described.In step 3, infrastructure product shown in Fig. 4 is obtained by machining process.
This method is different from the manufacturing method of conventional shape-memory alloy rivet, passes through mold batch under previous process conditions
It is low to manufacture rivet finished product efficiency, and there are problems that not putting forth effort that rivet is caused to manufacture process for using in low-temperature deformation processing procedure
It is complicated.The present invention using elder generation deformation, cut afterwards by the way of obtain rivet product, convenient for pre- deformation process, by designed letter
Stretching under the easy certain load of device, highly effective and reliably manufacture rivet finished product, high degree reduces processing cost.
The above described is only a preferred embodiment of the present invention, being not that the invention has other forms of limitations, appoint
What those skilled in the art changed or be modified as possibly also with the technology contents of the disclosure above equivalent variations etc.
Effect is implemented, but every without departing from technical solution of the present invention content, and technical spirit according to the present invention makees above example
Any simple modification, equivalent variations and remodeling, still fall within the protection domain of technical solution of the present invention.
Claims (8)
1. a kind of Ti base marmems rivet fastener, it is characterised in that：The rivet is by Ti base marmems
The manufactured marmem rivet that can play the role of fastening connection piece with certain shape.
2. Ti base marmems rivet fastener as described in claim 1, which is characterized in that the Ti base shape memories
Alloy includes but are not limited to Ti-Zr, Ti-Mo, Ti-Nb, Ti-Ta binary alloy system, Ti-Zr-Nb, Ti-Nb-Mo ternary alloy three-partalloy
The novel quaternary alloy system that system and above-mentioned alloy system are developed.
3. Ti base marmems rivet fastener as claimed in claim 2, which is characterized in that the Ti base shape memories
Alloy includes but are not limited to Ti- (20-30) Zr, Ti- (20-30) Mo, Ti- (20-30) Nb, Ti- (20-30) Ta, Ti- (20-
30) Zr- (5-10) Nb, Ti- (20-30) Nb- (5-10) Mo alloys.
4. such as claim 1-3 any one of them Ti base marmem rivet fasteners, which is characterized in that described in design
The tail portion of rivet fastener is raised structures, its size, which meets, after room temperature tensile processing enters the requirement of riveting location aperture, dress
Match and after heated recovery original shape, raised structures are in contact with connector end face and play fastening effect.
5. such as a kind of manufacturing method of Ti base marmems rivet fastener of claim 1-4 any one of them, comprising
Following steps：
1), alloy melting：Alloy raw material used for high-purity Ti (purity >=99.99%), high-purity Zr (purity >=99.99%) and
Other high-purity alloy raw materials obtain alloy cast ingot using vacuum non-consumable electric arc melting mode, pass through 1000 DEG C of -1500 DEG C of temperature
Degree heat preservation carries out Homogenization Treatments in 12-24 hours, ensures alloying component uniformity；
2), alloy forging and drawing：Alloy cast ingot is forged to obtain certain size square billet, Jin Ertong in 900 DEG C of -950 DEG C of conditions
It crosses drawing process and obtains a diameter of 10-100mm sizes alloy bar material；
3) it, is machined：By Ti base marmem bars, by vehicle, pincers, milling, plane, being machined into for more than one is ground
Type method produces the strip-shaped product for obtaining symmetrical structure, both ends are rivet round end or countersunk head, a diameter of 10-50mm of extension, end
A diameter of 15-80mm, symmetrical configuration Center raised points, the position cross-sectional diameter are 12-60mm；
4) it, makes annealing treatment：The strip-shaped product is carried out to vacuum heat-preserving processing in 2-10 hours in the range of 600-1000 DEG C, then
Rivet annealing process is completed by quenching process, eliminate mechanical processing residual stress and product phase composition is made to be room temperature geneva
Body phase；
5) it, is surface-treated：Product carries out mechanical polishing removal surface working process trace after annealing, and polishes smooth；Then
Product after surface treatment is put into 25-40 DEG C of absolute ethyl alcohol be cleaned by ultrasonic until taking out after any surface finish is pollution-free and is dried in the air
It is dry, obtain clean products；
6), deformation pre-processes：By the product after the surface treatment as carrying out deformation in specific stretching device under room temperature environment
The homogeneous deformation for 2-4% is measured, its extension diameter is made to meet the requirement of connection aperture, is then symmetrically cut along in the middle part of protruding point
To single rivet finished product.
6. the manufacturing method of marmem rivet fastener as claimed in claim 5, which is characterized in that the strip production
Product are symmetrical structure, and both ends are rivet round end or countersunk head, extension a diameter of 20-40mm, tip diameter 30-70mm, structure
Symmetrical centre designs raised points, which is 30-60mm.
7. the manufacturing method of marmem rivet fastener as claimed in claim 6, which is characterized in that the strip production
Product are symmetrical structure, and both ends are rivet round end or countersunk head, extension a diameter of 25mm, tip diameter 60mm, in symmetrical configuration
The heart designs raised points, which is 35mm.
8. such as the manufacturing method of claim 5-7 any one of them marmem rivet fasteners, which is characterized in that institute
State shape pretreatment, can be connected by designing specific stretching device and/or it is in parallel it is consistent stretch, cutting manufacture obtains
Rivet product after identical uniformly pre- deformation process.
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