CN110773740B - Light energy-absorbing vibration-damping imitation microstructure and preparation method thereof - Google Patents
Light energy-absorbing vibration-damping imitation microstructure and preparation method thereof Download PDFInfo
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- CN110773740B CN110773740B CN201911126850.5A CN201911126850A CN110773740B CN 110773740 B CN110773740 B CN 110773740B CN 201911126850 A CN201911126850 A CN 201911126850A CN 110773740 B CN110773740 B CN 110773740B
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F3/00—Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor ; Presses and furnaces
- B22F3/10—Sintering only
- B22F3/11—Making porous workpieces or articles
- B22F3/1103—Making porous workpieces or articles with particular physical characteristics
- B22F3/1115—Making porous workpieces or articles with particular physical characteristics comprising complex forms, e.g. honeycombs
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B33—ADDITIVE MANUFACTURING TECHNOLOGY
- B33Y—ADDITIVE MANUFACTURING, i.e. MANUFACTURING OF THREE-DIMENSIONAL [3-D] OBJECTS BY ADDITIVE DEPOSITION, ADDITIVE AGGLOMERATION OR ADDITIVE LAYERING, e.g. BY 3-D PRINTING, STEREOLITHOGRAPHY OR SELECTIVE LASER SINTERING
- B33Y10/00—Processes of additive manufacturing
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B33—ADDITIVE MANUFACTURING TECHNOLOGY
- B33Y—ADDITIVE MANUFACTURING, i.e. MANUFACTURING OF THREE-DIMENSIONAL [3-D] OBJECTS BY ADDITIVE DEPOSITION, ADDITIVE AGGLOMERATION OR ADDITIVE LAYERING, e.g. BY 3-D PRINTING, STEREOLITHOGRAPHY OR SELECTIVE LASER SINTERING
- B33Y80/00—Products made by additive manufacturing
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B64—AIRCRAFT; AVIATION; COSMONAUTICS
- B64G—COSMONAUTICS; VEHICLES OR EQUIPMENT THEREFOR
- B64G1/00—Cosmonautic vehicles
- B64G1/22—Parts of, or equipment specially adapted for fitting in or to, cosmonautic vehicles
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Abstract
The invention discloses a light energy-absorbing vibration-damping imitation microstructure and a preparation method thereof, wherein the light energy-absorbing vibration-damping imitation microstructure comprises the following steps: the energy absorption device comprises a plurality of energy absorption layers which are sequentially stacked from top to bottom, wherein each energy absorption layer comprises a plurality of energy absorption frames, and a metal rubber ball is embedded in each energy absorption frame; according to the invention, by referring to the mechanism that the elastic modulus and the strength are improved by filling interstitial atoms in a diamond microcosmic octahedral structure, a micro-imitation composite structure of NiTi metal rubber balls is filled in the gaps of the NiTi-based octahedral body printed by 3D printing, so that the elastic modulus, the strength and the energy absorption efficiency of a structural member can be improved; compared with the traditional damping rubber, the structure of the damping rubber has the advantages of radiation resistance, corrosion resistance, high and low temperature resistance, ageing resistance and the like; compared with the traditional metal rubber, the composite material has the advantages of high forming precision, capability of forming a complex structure, high energy absorption efficiency and the like; compared with a simple NiTi metal-based octahedral lattice structure, the energy-absorbing material has the advantages of high strength, high modulus, high energy-absorbing efficiency and the like.
Description
Technical Field
The invention relates to the field of energy-absorbing vibration-damping imitated microstructures, in particular to a light energy-absorbing vibration-damping imitated microstructure and a preparation method thereof.
Background
The problems of vibration generated by an engine, vibration generated by airflow impact and even severe vibration generated in the landing process of aerospace and space vehicles in the outer space flight process need to be solved, and a large amount of damping rubber needs to be installed. However, the actual working conditions of the service of aircraft components (such as engine pipelines, spacecraft solar sailboards and the like) are special and complex, for example, the aircraft components face special conditions of ray and particle radiation, high temperature, low temperature, high pressure, high vacuum and the like, the traditional rubber has low heat conduction capacity, radiation is easy to age and the like, and therefore the application range and the application capacity are limited.
Disclosure of Invention
The invention provides a light energy-absorbing vibration-damping imitation microstructure and a preparation method thereof, aiming at overcoming the defects of the energy-absorbing vibration-damping imitation microstructure made of the traditional rubber.
In order to achieve the above object, the present invention provides a light energy-absorbing vibration-damping imitation microstructure, which comprises:
the energy absorption device comprises a plurality of energy absorption layers which are sequentially stacked from top to bottom, wherein each energy absorption layer comprises a plurality of energy absorption frames, and a metal rubber ball is embedded in each energy absorption frame; the energy absorption frame is made of a NiTi alloy.
Wherein, 12 edges of the energy-absorbing frame respectively correspond to 12 edges of the regular octahedron, and 6 vertexes of the energy-absorbing frame respectively correspond to 6 vertexes of the regular octahedron.
The metal vibration damping rubber made of NiTi alloy has the advantages of radiation resistance, high and low temperature resistance (-30-300 ℃), heat conduction, corrosion resistance, ageing resistance and the like, and can replace the traditional rubber with complex service working conditions in aerospace aircrafts.
The invention provides a light energy-absorbing vibration-damping diamond-like octahedral gap filling structure and a preparation method thereof. Specifically, NiTi metal powder is used as a raw material, a 3D printing technology is adopted to prepare a diamond-like micro octahedral lattice structural member, and NiTi metal rubber balls (taking NiTi super elastic wires as a raw material) are filled in octahedral gaps. The invention provides a micro-imitation composite structure of NiTi metal rubber balls filled in NiTi-based octahedral gaps printed in 3D mode by referring to the mechanism that the elastic modulus and the strength of a structural member are improved by filling interstitial atoms in a diamond micro-octahedral structure, so that the elastic modulus, the strength and the energy absorption efficiency of the structural member are improved. Compared with the traditional damping rubber (organic rubber), the 3D printed NiTi-based octahedral gap filling NiTi metal rubber ball energy-absorbing damping structure has the advantages of radiation resistance, corrosion resistance, high and low temperature resistance (minus 30-300 ℃), ageing resistance and the like; compared with the traditional metal rubber (such as stainless steel metal rubber, the metal rubber is formed by mould pressing), the energy-absorbing rubber has the advantages of high forming precision, capability of forming a complex structure, high energy-absorbing efficiency and the like; compared with a simple NiTi metal-based octahedral lattice structure, the energy-absorbing material has the advantages of high strength, high modulus, high energy-absorbing efficiency and the like.
Compared with the traditional rubber, the NiTi-based octahedral gap filling NiTi metal rubber ball energy-absorbing vibration-damping structure has the advantages of ageing resistance, high and low temperature resistance, corrosion resistance, radiation resistance and the like because the NiTi alloy is adopted, so the NiTi-based octahedral gap filling NiTi metal rubber ball energy-absorbing vibration-damping structure has the advantages.
Compared with the traditional metal rubber, the NiTi-based octahedral gap filling NiTi metal rubber ball energy absorption and vibration reduction structure is formed by 3D printing, so that the forming size precision is high; the energy absorption efficiency is high because of the adoption of NiTi superelastic alloy (the material is subjected to phase change energy absorption in the deformation process).
Compared with a simple NiTi metal-based octahedral lattice structure, the energy absorption efficiency is improved because the octahedral gaps are filled with the NiTi metal rubber balls, the strength and the modulus are improved.
The invention provides a structure for filling diamond-like octahedron gaps, namely a 3D printed NiTi-based octahedron gap filling NiTi metal rubber ball composite structure and a preparation method of the composite structure. Specifically, the invention is realized by the following technical scheme:
compared with the traditional damping rubber (organic rubber), the 3D printed NiTi-based octahedral gap filling NiTi metal rubber ball energy-absorbing damping structure has the advantages of radiation resistance, corrosion resistance, high and low temperature resistance (minus 30-300 ℃), ageing resistance and the like; compared with the traditional metal rubber (such as stainless steel metal rubber, the metal rubber is formed by mould pressing), the energy-absorbing rubber has the advantages of high forming precision, capability of forming a complex structure, high energy-absorbing efficiency and the like; compared with a simple NiTi metal-based octahedral lattice structure, the energy-absorbing material has the advantages of high strength, high modulus, high energy-absorbing efficiency and the like.
The preparation method of the 3D printed NiTi-based octahedral gap filling NiTi metal rubber ball energy absorption and vibration reduction structure comprises the steps of establishing an octahedral structure model, printing a NiTi-based octahedral structural member, processing the surface of the NiTi-based octahedral structural member, filling the NiTi metal rubber ball and the like. Further, the modeling and printing processes are as follows:
1) UG software is adopted to establish a porous structure model with certain size requirements (the rod diameter of the structural unit and the size of the structural unit), and detailed figure 1 is shown.
2) And inputting the porous structure model into a computer control part of a 3D printer, and adjusting printing parameters (laser power of 50-300W, scanning speed of 500-1500 mm/s, layer thickness of 0.02-0.05 mm, interlayer rotation angle of 67 degrees and scanning distance of 0.06-0.15 mm).
3) NiTi alloy powder is put into a printer box body, the atomic percentages of the chemical components of the alloy powder are Ni 49-51% and Ti 49-51%, and porous structure printing is carried out after preheating of the printer and control of the atmosphere are finished.
4) Further, the printed and formed structural member needs to be subjected to surface treatment to remove attached particles, surface slag, oxides and the like on the surface of the structural member, and the specific surface treatment method is as follows: pickling the 3D printed NiTi octahedral structural member in a chemical reagent (HNO 3: HF: H2O ═ 1:1:2) for 1-10 min, and observing the surface to be bright and have no attachments under a scanning electron microscope.
5) Selecting Ni x Ti y metal rubber balls with certain diameters (the diameter is larger than the diameter of an octahedral gap), wherein the range of x is Ni 49% -51%, the range of y is Ti 49% -51%, performing special treatment on the metal rubber balls (the metal rubber balls are placed into liquid nitrogen for cooling, and performing compression volume treatment) and filling the metal rubber balls into NiTi-based octahedral gaps of 3D printing, and detailed drawing 2.
6) And (3) filling NiTi metal rubber energy-absorbing structural members into the NiTi-based octahedron gaps, and preserving the heat for 10-30 min in a thermostat at 50-80 ℃.
One or more technical solutions provided by the present application have at least the following technical effects or advantages:
compared with the traditional damping rubber (organic rubber), the 3D printed NiTi-based octahedral gap filling NiTi metal rubber ball energy-absorbing damping structure has the advantages of radiation resistance, corrosion resistance, high and low temperature resistance (minus 30-300 ℃), ageing resistance and the like; compared with the traditional metal rubber (such as stainless steel metal rubber, the metal rubber is formed by mould pressing), the energy-absorbing rubber has the advantages of high forming precision, capability of forming a complex structure, high energy-absorbing efficiency and the like; compared with a simple NiTi metal-based octahedral lattice structure, the energy-absorbing material has the advantages of high strength, high modulus, high energy-absorbing efficiency and the like.
Drawings
The accompanying drawings, which are included to provide a further understanding of the embodiments of the invention and are incorporated in and constitute a part of this application, illustrate embodiments of the invention and together with the description serve to explain the principles of the invention;
FIG. 1 is a schematic diagram of a diamond octahedral structure model according to the present invention;
FIG. 2 is a schematic diagram of an octahedral gap-filling metal rubber ball model in the present invention;
FIG. 3 is a schematic diagram of the compression curves of a NiTi-based simple octahedral print and a NiTi-based octahedral gap-filling structure according to the present invention;
wherein, the energy absorption layer is 1, the energy absorption frame is 2, and the metal rubber ball is 3.
Detailed Description
In order that the above objects, features and advantages of the present invention can be more clearly understood, a more particular description of the invention will be rendered by reference to the appended drawings. It should be noted that the embodiments and features of the embodiments of the present application may be combined with each other without conflicting with each other.
In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention, however, the present invention may be practiced in other ways than those specifically described and thus the scope of the present invention is not limited by the specific embodiments disclosed below.
It will be understood by those skilled in the art that in the present disclosure, the terms "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like are used in an orientation or positional relationship indicated in the drawings for ease of description and simplicity of description, and do not indicate or imply that the referenced devices or components must be constructed and operated in a particular orientation and thus are not to be considered limiting.
It is understood that the terms "a" and "an" should be interpreted as meaning that a number of one element or element is one in one embodiment, while a number of other elements is one in another embodiment, and the terms "a" and "an" should not be interpreted as limiting the number.
Referring to fig. 1 to fig. 3, an embodiment of the present invention provides a light energy-absorbing vibration-damping microstructure, including:
the energy absorption device comprises a plurality of energy absorption layers 1 which are sequentially stacked from top to bottom, wherein each energy absorption layer comprises a plurality of energy absorption frames 2, and a metal rubber ball 3 is embedded in each energy absorption frame; the energy absorption frame is made of a NiTi alloy.
In the embodiment of the invention, 12 sides of the energy-absorbing frame respectively correspond to 12 sides of the regular octahedron, and 6 vertexes of the energy-absorbing frame respectively correspond to 6 vertexes of the regular octahedron.
In the embodiment of the invention, the diameter of the metal rubber ball is larger than the maximum gap distance between two adjacent edges of the energy-absorbing frame, so that the rubber ball embedded into the gap of the structure can be embedded stably and prevented from falling off.
In the embodiment of the invention, the metal rubber ball is a NiTi metal rubber ball which is a spherical object prepared by taking NiTi super-elastic wires as raw materials.
In the embodiment of the invention, the alloy powder of the energy-absorbing frame comprises the chemical components of Ni 49-51% and Ti 49-51% in atomic percentage.
In the embodiment of the invention, a plurality of energy absorption units in each energy absorption layer are uniformly tiled to form the energy absorption layer.
Wherein, in the embodiment of the invention, the structure is made by 3D printing.
Wherein, in the embodiment of the invention, the size of the metal rubber ball is matched with the size of the inner space of the energy absorption frame.
Example 1
1) An octahedral structure model (10mm multiplied by 10mm) in the figure 1 is established by UG software, the length of the adjusting rod is 2mm, the diameter of the adjusting rod is 0.2mm, and the model is led into a host control system of the 3D printer.
2) Printing parameters are adjusted, and the laser power is 100W, the scanning speed is 900mm/s, the layer thickness is 0.02mm, the interlayer rotation angle is 67 degrees, and the scanning distance is 0.10 mm. NiTi powder with the atomic percentages of Ni 49-51% and Ti 49-51% is selected and filled into a powder box for preheating of a printer and regulation and control of cavity atmosphere. And starting to print the structural part after the preparation work is finished until printing is finished.
3) The print was removed and placed in a chemical reagent (HNO 3: HF: H2O ═ 1:1:2), and washing the surface oxide layer and the deposit.
4) Selecting Ni x Ti y metal rubber balls with the diameter of 2mm, wherein the range of x is Ni 49-51 percent, and the range of y is Ti 49-51 percent, and filling the metal rubber balls into NiTi-based octahedral gaps of 3D printing after special treatment.
5) And (3) placing the NiTi-based octahedral gap filling NiTi metal rubber ball energy absorption structural member subjected to 3D printing in a thermostat at 80 ℃ for heat preservation for 20 min.
The invention tests the compressive mechanical property and the energy absorption effect of the imitation microstructure through a compression test, and the detail is shown in figure 3. Research shows that compared with a simple NiTi-based octahedral structural member, the modulus, the strength and the energy absorption efficiency of the micro-imitation energy absorption structure are remarkably enhanced.
While preferred embodiments of the present invention have been described, additional variations and modifications in those embodiments may occur to those skilled in the art once they learn of the basic inventive concepts. Therefore, it is intended that the appended claims be interpreted as including preferred embodiments and all such alterations and modifications as fall within the scope of the invention.
It will be apparent to those skilled in the art that various changes and modifications may be made in the present invention without departing from the spirit and scope of the invention. Thus, if such modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include such modifications and variations.
Claims (10)
1. The light energy-absorbing vibration-damping imitation microstructure is characterized by comprising:
the energy absorption device comprises a plurality of energy absorption layers which are sequentially stacked from top to bottom, wherein each energy absorption layer comprises a plurality of energy absorption frames, and a metal rubber ball is embedded in each energy absorption frame; the energy absorption frame is made of a NiTi alloy.
2. The light energy-absorbing vibration-damping imitation microstructure according to claim 1, wherein 12 sides of the energy-absorbing frame correspond to 12 sides of the regular octahedron respectively, and 6 vertexes of the energy-absorbing frame correspond to 6 vertexes of the regular octahedron respectively.
3. The light energy-absorbing vibration-damping imitation microstructure of claim 1, wherein the diameter of the metal rubber ball is larger than the maximum gap distance between two adjacent edges of the energy-absorbing frame.
4. The light energy-absorbing vibration-damping imitation microstructure according to claim 1, wherein the metal rubber ball is a NiTi metal rubber ball, and is a ball made of NiTi superelastic wire.
5. The light energy-absorbing vibration-damping imitation microstructure according to claim 1, wherein the alloy powder chemical composition of the energy-absorbing frame is Ni 49-51% and Ti 49-51% in atomic percentage.
6. The light energy-absorbing vibration-damping imitation microstructure according to claim 1, wherein a plurality of energy-absorbing units in each energy-absorbing layer are uniformly tiled to form the energy-absorbing layer.
7. The light energy absorbing vibration damping imitation microstructure of claim 1, wherein the structure is made using 3D printing.
8. The light energy absorbing vibration damping imitation microstructure of claim 1, wherein the size of the metal rubber ball matches the size of the internal space of the energy absorbing frame.
9. A method for preparing a light-weight energy-absorbing vibration-damping imitation microstructure according to any one of claims 1 to 8, characterized in that the method comprises:
establishing an energy-absorbing vibration-damping microstructure imitation model;
inputting the energy-absorbing vibration-damping microstructure-imitating model into a 3D printer, and adjusting printing parameters;
putting NiTi alloy powder into a printer box body, and printing an energy-absorbing vibration-damping imitation microstructure after the printer is preheated and the atmosphere is controlled;
the printed structural part needs to be subjected to surface treatment;
selecting a NiTi metal rubber ball with a certain diameter, and filling the metal rubber ball into a cavity of the surface-treated structural part;
and (4) placing the structural part filled with the NiTi metal rubber ball into a thermostat for heat preservation.
10. The preparation method of the light-weight energy-absorbing vibration-damping imitation microstructure according to claim 9, wherein the surface treatment process comprises the following steps: pickling the printed and formed structural part in a chemical reagent for 1-10 min, and observing the bright surface without attachments under a scanning electron microscope to finish the surface treatment, wherein the chemical reagent is HNO 3: HF: H2O ═ 1:1: 2.
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| CN112249509B (en) * | 2020-09-01 | 2022-08-02 | 哈尔滨工业大学（深圳） | Energy-absorbing structure and energy-absorbing buffer device |
| CN114954887B (en) * | 2022-01-24 | 2024-01-23 | 重庆大学 | Light electric steering engine anti-impact protective shell based on three-dimensional rotation lattice structure |
| CN114976421B (en) * | 2022-06-24 | 2023-07-04 | 厦门金龙联合汽车工业有限公司 | Battery box, slide plate type chassis and electric automobile |
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