CN108149065B - A kind of Ti base marmem rivet fastener and its manufacturing method - Google Patents
A kind of Ti base marmem rivet fastener and its manufacturing method Download PDFInfo
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- CN108149065B CN108149065B CN201711405819.6A CN201711405819A CN108149065B CN 108149065 B CN108149065 B CN 108149065B CN 201711405819 A CN201711405819 A CN 201711405819A CN 108149065 B CN108149065 B CN 108149065B
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- 238000004519 manufacturing process Methods 0.000 title claims abstract description 68
- 238000000034 method Methods 0.000 claims abstract description 63
- 230000008569 process Effects 0.000 claims abstract description 44
- 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 36
- 229910045601 alloy Inorganic materials 0.000 claims description 35
- 238000012545 processing Methods 0.000 claims description 10
- 238000000137 annealing Methods 0.000 claims description 9
- 238000011282 treatment Methods 0.000 claims description 9
- 238000003754 machining Methods 0.000 claims description 8
- 239000002994 raw material Substances 0.000 claims description 8
- 238000002844 melting Methods 0.000 claims description 6
- 230000008018 melting Effects 0.000 claims description 6
- 238000004381 surface treatment Methods 0.000 claims description 6
- 239000000463 material Substances 0.000 claims description 4
- 239000000203 mixture Substances 0.000 claims description 4
- 238000005498 polishing 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
- 238000000227 grinding 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
- 238000011084 recovery Methods 0.000 claims description 3
- PMTRSEDNJGMXLN-UHFFFAOYSA-N titanium zirconium Chemical compound [Ti].[Zr] PMTRSEDNJGMXLN-UHFFFAOYSA-N 0.000 claims description 3
- 238000004506 ultrasonic cleaning Methods 0.000 claims description 3
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims description 2
- 229910002056 binary alloy Inorganic materials 0.000 claims description 2
- 229960000935 dehydrated alcohol Drugs 0.000 claims description 2
- 229910002058 ternary alloy Inorganic materials 0.000 claims description 2
- 229910001257 Nb alloy Inorganic materials 0.000 claims 1
- 238000007781 pre-processing Methods 0.000 claims 1
- 229910002059 quaternary alloy Inorganic materials 0.000 claims 1
- 238000013461 design Methods 0.000 abstract description 19
- 238000010438 heat treatment Methods 0.000 abstract description 7
- 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
- 238000004321 preservation Methods 0.000 description 5
- 238000005516 engineering process Methods 0.000 description 3
- 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
- 229910001182 Mo alloy Inorganic materials 0.000 description 1
- 208000037656 Respiratory Sounds Diseases 0.000 description 1
- 229910011214 Ti—Mo Inorganic materials 0.000 description 1
- 150000001298 alcohols Chemical class 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
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- 230000007774 longterm Effects 0.000 description 1
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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 marmem rivet fastener and its manufacturing method, which is prepared using Ti base marmem, and shape is designed as symmetrical structure, and both ends are rivet round end or countersunk head, and raised points are designed at symmetrical configuration center.2-4% deformation is generated by midplane extrusion in production and technique, then cutting obtains rivet finished product in the middle part of each raised points, replys original shape by heating in connecting portion and plays good fastening effect.By design specific stretching device carry out it is in series or in parallel it is consistent stretch, cutting manufacture obtains the rivet product after 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, in particular to a kind of marmem rivet fastener and its simplicity,
Reliably, mass manufacturing method.
Background technique
Traditional rivet fastener, which generallys use interference engagement mode and connects, mitigates construction weight and significant extending structure service life.
But for conventional fastener, when interference engagement, is attached using the method for forced installation, is typically due to each portion of fastener
Position plastic deformation unevenly leads to Radial Rotation Error swelling occur in its recovery, is easy to cause hole wall crackle to connecting component
Damage.Marmem shape adjoint in heating phase transition process reverts to homogeneous deformation, can restore original shape completely
Shape, therefore to solve the problems, such as that traditional rivet fastener connects generated heterogeneous deformation, it is manufactured using marmem new
Snap riveting nail fastener.
The more mature marmem fastener material of application is mainly NiTi based alloy at present.NiTi base shape note
Recall alloy 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 guarantee overall structure lightweight and reliability.Such as
NiTiFe memorial alloy hydraulic air pipe joint is largely answered 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 alloy 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, load in design
Deformation process difficulty is larger.Patent of invention CN201080055244.X uses the self-expanding feature of NiTi base marmem,
Occur to force plastic deformation in the connector aperture to contact with each other, 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 manufacture, preservation and use cost high, operational sequence is cumbersome.
Ti base marmem is a kind of Novel memory alloy material developed in recent years, has good mechanical performance
(tensile strength 700MPa) and shape memory effect (4%) can satisfy rivet manufacture requirement, and compare traditional NiTi
Based alloy has many advantages, such as that low-density (about the 70~80% of NiTi based alloy), use temperature range are wide (- 100~200 DEG C).
At the same time, Ti base memorial alloy phase transition temperature is generally greater than room temperature, and its parent phase stability is high, and working environment drops after deformation
It is low that martensite transfor mation will not occur and there is high intensity, cryogenic relaxation phenomenon will not occur.So Ti base marmem is tight
Firmware can complete deformation under room temperature environment (being not necessarily to low temperature environment), save, and can especially expire in fields such as aerospaces
The requirement used safely within the scope of sufficient different temperatures is capable of the manufacture of high degree reduction marmem fastener, is saved
And use cost.Ti base memorial alloy mainly includes the alloy systems such as Ti-Nb, Ti-Zr and Ti-Ta, such as Ti-Zr-Nb-Fe is closed
Golden (such as CN201710046448.0) has high transformation temperature (150 DEG C of As >), as raw material manufacture fastener carry out using
When, machining deformation, and the long-term preservation under room temperature environment, and the product of such alloy production can be carried out under room temperature environment
It can stablize.
Conventional shape-memory alloy rivet fastener is to generate interference engagement effect, (such as liquid nitrogen) need to be made at low ambient temperatures
It pre- deformation process is carried out to produced rivet finished product and is saved with preceding, so that it is met the requirement of connector aperture, therefore in processing work
It is difficult to realize mass processing 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 manufacturer of traditional rivet to the manufacturing method of marmem rivet
Method, such as pier system, the traditional preparation methods such as cold rolling.However there are high expensives for such manufacturing method, the device is complicated, and machining accuracy is not
The deficiencies of controllable.Therefore, it also needs to develop the manufacturing method that a kind of low production cost, efficient, equipment and process flow simplify.
Summary of the invention
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 marmem rivet fastener and its manufacturing method.
The present invention manufactures rivet fastener using Ti base marmem, and the manufacture of product under room temperature may be implemented
And it saves, and fastener has excellent properties stability and reliability after the completion of riveting, and production and use cost is effectively reduced.It should
Rivet product is lower (about the 70~80% of NiTi based alloy) 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 products of low cost manufacturing excellent properties, solution
The certainly big problem of marmem rivet low temperature process deformation difficulty, guarantees properties of product consistency and reliability.
The technical solution of Ti base marmem manufacture rivet fastener provided by the invention is as follows:
A kind of Ti base marmem rivet fastener, it is characterised in that: the rivet is closed by Ti base shape memory
With 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 marmem 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 marmem 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 alloy system.
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, after assembly and 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 marmem rivet fastener, and specific technical solution is such as
Under:
A kind of manufacturing method of Ti base marmem rivet fastener comprising the steps of:
1, 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 12-24 hours progress Homogenization Treatments of temperature guarantee alloying component uniformity；
2, alloy forging and drawing: alloy cast ingot is forged to obtain certain size square billet in 900 DEG C of -950 DEG C of conditions, in turn
Obtaining diameter by drawing process is 10-100mm size alloy bar material；
3, it is machined: Ti base marmem bar is added by vehicle, pincers, milling, plane, the machinery for grinding more than one
Work forming method produces the strip-shaped product for obtaining symmetrical structure, both ends are rivet round end or countersunk head, and extension diameter is 10-
Raised points are designed at 50mm, tip diameter 15-80mm, symmetrical configuration center, which is 12-60mm；
4, it makes annealing treatment: the strip-shaped product is carried out to vacuum heat-preserving processing in 2-10 hours within the scope of 600-1000 DEG C,
Rivet annealing process is then completed by quenching process, eliminate machining residual stress and makes product phase composition room temperature
Martensitic phase；
5, it is surface-treated: product after annealing being subjected to mechanical polishing and removes surface working process trace, and is polished smooth；With
The product after surface treatment is put into 25-40 DEG C of dehydrated alcohol afterwards and carries out ultrasonic cleaning until taking out after any surface finish is pollution-free
It dries, obtains clean products；
6, 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%, so that its extension diameter is met connection aperture and requires, the then 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, is stretched
Long sections of straight diameter is 20-40mm, tip diameter 30-70mm, and raised points are designed at symmetrical configuration center, which is
40‐60mm；(2) it prepares in production technology and deformation is generated by midplane extrusion, then cutting obtains rivet 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, is stretched
Long sections of straight diameter is 25mm, and tip diameter 60mm, symmetrical configuration center design raised points, which is 35mm；
In a preferred embodiment, the shape pretreatment, can be and 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 to cause rivet to manufacture process for using in low-temperature deformation treatment process
It is complicated.The present invention using first deformation, cut afterwards by the way of obtain rivet product, be 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 technical effect that the present invention can obtain compared with prior art has:
1, the present invention manufactures rivet fastener using Ti base marmem, and phase transition temperature is higher than room temperature, Ke Yishi
Now production and preservation under room temperature is not necessarily to cryogenic conditions (such as liquid nitrogen environment), reduces product manufacturing processing cost；
2, the present invention manufactures rivet fastener using Ti base marmem, closes relative to traditional NiTi base shape memory
Golden product, the rivet product have lower density (NiTi alloy density 6.5g/cm3, Ti based alloy density 5.3g/cm3), energy
The enough weight for further mitigating connection structure；
3, the present invention manufactures rivet fastener using Ti base marmem, which, which completes to be heated, restores stepmother
Mutually have the characteristics that high-intensitive and stability, improves connection reliability and service life；
4, using manufacturing method of the present invention can efficiently, low cost manufacturing same size marmem rivet product,
It designs unique manufacturing procedure and solves the problems, such as that marmem rivet low temperature process deformation difficulty is big, simplify manufacture production stream
Journey；
5, can guarantee the rivet product size consistency of same batch production using manufacturing method of the present invention, improve rivet at
Product rate and use reliability；
6, manufacturing method of the present invention is convenient, fast, and miniaturization operation may be implemented, can promote the use of in various fields.
Detailed description of the invention:
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, drawings in the following description are some embodiments of the invention, for
For those of ordinary skill in the art, without any creative labor, it can also be obtained according to these attached drawings
His attached drawing is the scope of protection of the patent of the present invention.
Fig. 1 is rivet fastener product structure and manufacturing method schematic diagram.
Fig. 2 is that rivet fastener assembles using process diagram.
Fig. 3 is that consistent series connection stretches two or more rivet product structure and manufacturing method schematic diagram (wherein n >=2, expression
The design includes two or more product structure).
Fig. 4 be it is consistent in parallel stretch two or more rivet product structure and manufacturing method schematic diagram (wherein n >=2, m >=
2, indicate that the design includes two or more product structure).
Specific embodiment
Specific embodiment part provides detailed embodiment of the invention.However, disclosed embodiment is only
Example of the invention can be embodied with various alternative forms.Therefore, in specific structure and the not purport of details functionally
It is being restrictive, they provide the foundation of claim and as representational foundation for instructing art technology
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；Protruding point is designed at symmetrical configuration center, and position cross-sectional diameter d3 is 12-60mm, and position 4 is that specific end stretches dress
It sets.
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 increases the length of rivet as impetus is stretched, and transversal half
Diameter is reduced to d, and then symmetrical cutting obtains rivet finished product in the middle part of protruding point, can be in specific operation item as shown in Fig. 2 (b)
It is riveted under part.Size restoration is then occurred 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 or more product cascaded structure, each position design structure size and phase in embodiment 1
With (wherein n >=2 indicate that the design includes two or more product structure).To guarantee 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 product is placed in specific stretching device
Middle carry out homogeneous deformation, then symmetrical cutting obtains rivet finished product in the middle part of each product protruding point and in the middle part of end, can be in spy
Determine to be riveted under working condition, and restores to play interference fit riveting fastening effect by heating.
Method shown in Fig. 3 can design two or more product cascaded structure, can be good in production and use process
Guarantee deformation uniformity consistency well, is greatly saved manufacturing cost.Under different use conditions and amount of interference, it must guarantee to stretch link
Product cascaded structure number is set on the basis of uniformity, and otherwise pre- deformation process will lead to product size and deviation, structure occurs
It is unable to satisfy same requirement.
Method as shown in Figure 4 manufactures two or more Fig. 3 structure parallel connection drawn products, each symmetrical section Position Design
Unanimously to connect, (wherein n >=2, m >=2 indicate that the design includes two or more to stretching two or more rivet product with Fig. 3
Product structure).To guarantee 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 product is placed in specific stretching device and carries out homogeneous deformation, then in the middle part of each symmetrical section protruding point
And symmetrical cutting obtains rivet finished product in the middle part of end, can be riveted under the conditions of specific operation, and is restored by heating
To interference fit riveting fastening effect.
The consistent multiple products of stretching in parallel can be designed in scheme shown in Fig. 4, need to be designed according to specifically used requirement in parallel
Stretching device is greatly saved manufacturing cost to guarantee to guarantee deformation uniformity consistency in production and use process.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 guaranteeing to stretch link uniformity
Mesh, otherwise pre- deformation process will lead to product size and deviation occurs, and structure is unable to satisfy same requirement.
Present contribution to the art is protruded below by specific embodiment.
Embodiment 1
The group of Ti base marmem rivet becomes Ti- (20-30) Zr.
Its manufacturing method is as follows:
1, alloy melting: according to the proportion of composition of alloy, 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 guarantees alloying component uniformity by 1000 DEG C of temperatures, 14 hours progress Homogenization Treatments；
2, alloy forging and drawing: alloy cast ingot is forged to obtain certain size square billet in 920 DEG C of conditions, and then passes through drawing
Pulling out technique and obtaining diameter is 80mm size alloy bar material；
3, it is machined: Ti base marmem bar is added by vehicle, pincers, milling, plane, the machinery for grinding more than one
Work forming method produces to obtain the strip-shaped product that symmetrical structure, both ends as shown in Fig. 1 (a) are rivet round end or countersunk head, elongation
Section diameter is 25mm, and tip diameter 60mm, symmetrical configuration center design raised points, which is 35mm；
4, it makes annealing treatment: the strip-shaped product being carried out to vacuum heat-preserving processing in 2 hours within the scope of 800 DEG C, is then passed through
Quenching process completes rivet annealing process, eliminates machining residual stress and makes product phase composition room temperature martensite
Phase；
5, it is surface-treated: product after annealing being subjected to mechanical polishing and removes surface working process trace, and is polished smooth；With
The product after surface treatment is put into 25 DEG C of dehydrated alcohols afterwards and carries out ultrasonic cleaning until taking-up is dried in the air after any surface finish is pollution-free
It is dry, obtain clean products；
6, deformation pre-processes: by the product after the surface treatment as carrying out shape in specific stretching device under room temperature environment
The homogeneous deformation that variable is 2% makes its extension diameter meet connection aperture and requires, then symmetrically cuts in the middle part of protruding point
To single rivet finished product.
Embodiment 2
Ti base marmem rivet group becomes Ti-35Mo.
Its manufacturing method is identical as 1 manufacturing method of embodiment, and difference is that manufacture two or more is shown according to Fig. 3 to be produced
Product cascaded structure, each position design structure size it is in the same manner as in Example 1 (wherein n >=2, indicate the design include two and
The above product structure).To guarantee 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 as 1 manufacturing method of embodiment, Fig. 3 infrastructure product is placed in specific stretching device and carries out homogeneous deformation, with
Symmetrical cutting obtains rivet finished product in the middle part of each product protruding point and in the middle part of end afterwards, and riveting can be carried out under the conditions of specific operation
It connects, and restores to play interference fit riveting fastening effect by heating.
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 needs 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 marmem rivet group becomes Ti-20Zr-5Nb.
Its manufacturing method be it is identical as the preparation method of embodiment 2, according to 2 design concept of embodiment, manufacture as shown in Figure 4
Two or more Fig. 3 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 or more rivet product structure and manufacturing method schematic diagram (wherein n >=2, m >=2, indicate the design include two and
The above product structure).To guarantee 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 as 1 application method of embodiment, Fig. 4 infrastructure product is placed in specific stretching device and carries out homogeneous deformation, with
Symmetrical cutting obtains rivet finished product in the middle part of each symmetrical section protruding point and in the middle part of end afterwards, can carry out under the conditions of specific operation
Riveting, and restore to play interference fit riveting fastening effect by heating.
The consistent multiple products of stretching in parallel are designed in the embodiment, need to stretch dress according to specifically used requirement design is in parallel
It sets, to guarantee to guarantee deformation uniformity consistency in production and use process, is greatly saved manufacturing 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 guaranteeing to stretch link uniformity
Mesh, otherwise pre- deformation process will lead to product size and deviation occurs, and structure is unable to satisfy 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 to cause rivet to manufacture process for using in low-temperature deformation treatment process
It is complicated.The present invention using first deformation, cut afterwards by the way of obtain rivet product, be 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 without departing from the technical solutions of the present invention, above embodiments are made according to the technical essence of the invention
Any simple modification, equivalent variations and remodeling, still fall within the protection scope of technical solution of the present invention.
Claims (5)
1. a kind of manufacturing method of Ti base marmem rivet fastener comprising the steps of:
1), alloy melting: alloy raw material used be 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 12-24 hours progress Homogenization Treatments of temperature guarantee 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
Crossing drawing process and obtaining diameter is 10-100mm size alloy bar material；
3) it, is machined: by Ti base marmem bar, by vehicle, pincers, milling, plane, grinding being machined into for more than one
Type method produces the strip-shaped product for obtaining symmetrical structure, both ends are rivet round end or countersunk head, and extension diameter is 10-50mm, end
Head diameter is 15-80mm, and raised points are designed at symmetrical configuration center, which is 12-60mm；
4) it, makes annealing treatment: the strip-shaped product being carried out to vacuum heat-preserving processing in 2-10 hours within the scope of 600-1000 DEG C, then
Rivet annealing process is completed by quenching process, eliminate machining residual stress and makes product phase composition room temperature geneva
Body phase；
5) it, is surface-treated: product after annealing being subjected to mechanical polishing and removes surface working process trace, and is polished smooth；Then
Product after surface treatment is put into 25-40 DEG C of dehydrated alcohol and carries out ultrasonic cleaning until taking-up is dried in the air after any surface finish is pollution-free
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
Amount is the homogeneous deformation of 2-4%, so that its extension diameter is met connection aperture and requires, then symmetrically cuts in the middle part of raised points
To single rivet finished product；
Wherein, the strip-shaped product is symmetrical structure, and both ends are rivet round end or countersunk head, and extension diameter is 25mm, and end is straight
Diameter is 60mm, and raised points are designed at symmetrical configuration center, which is 35mm；
Also, the rivet is can to play fastening connection piece work with certain shape made of Ti base marmem
Marmem rivet；The tail portion for designing the rivet fastener is raised structures, its ruler after room temperature tensile processing
It is very little to meet into the requirement of riveting location aperture, after assembly and heated recovery original shape, raised structures and connector end face phase
Fastening effect is played in contact.
2. the manufacturing method of Ti base marmem rivet fastener as described in claim 1, which is characterized in that the Ti
Base marmem includes but are not limited to Ti-Zr binary alloy system, Ti-Zr-Nb ternary alloy system and above-mentioned alloy system
The quaternary alloy system developed.
3. the manufacturing method of Ti base marmem rivet fastener as claimed in claim 2, which is characterized in that the Ti
Base marmem includes but are not limited to Ti- (20-30) Zr, Ti- (20-30) Zr- (5-10) Nb alloy.
4. the manufacturing method of marmem rivet fastener a method according to any one of claims 1-3, which is characterized in that described
Strip-shaped product is symmetrical structure, and both ends are rivet round end or countersunk head, and extension diameter is 20-40mm, tip diameter 30-
Raised points are designed at 70mm, symmetrical configuration center, which is 30-60mm.
5. the manufacturing method of marmem rivet fastener as claimed in claim 4, which is characterized in that the deformation is pre-
Processing is that specific stretching device connect and/or parallel connection unanimously stretches, cutting manufactures and obtains identical uniform pre- shape by designing
Become treated rivet product.
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| CN109604945A (en) * | 2018-11-29 | 2019-04-12 | 中国科学院金属研究所 | A kind of preparation method of interference engagement marmem fastener |
| CN112112874A (en) * | 2020-08-15 | 2020-12-22 | 西北工业大学 | Connecting assembly manufactured based on memory alloy and assembling method thereof |
| CN114935063B (en) * | 2022-06-02 | 2023-11-21 | 太仓阿尔法数字科技有限公司 | Pipeline memory alloy repairing method and device |
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