CN112896559A - Cube star frame based on 3D prints - Google Patents
Cube star frame based on 3D prints Download PDFInfo
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- CN112896559A CN112896559A CN202110341545.9A CN202110341545A CN112896559A CN 112896559 A CN112896559 A CN 112896559A CN 202110341545 A CN202110341545 A CN 202110341545A CN 112896559 A CN112896559 A CN 112896559A
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- cube
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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
- B64G1/66—Arrangements or adaptations of apparatus or instruments, not otherwise provided for
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- Aviation & Aerospace Engineering (AREA)
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Abstract
The invention discloses a cube star frame based on 3D printing, which comprises a side frame, a connecting screw rod, fixing tables and a solar cell panel, wherein 4 fixing tables are connected inside the side frame, the surfaces of the fixing tables are connected with the connecting screw rod, a circuit board is sleeved on the outer surface of the connecting screw rod, a large circular hole and a small circular hole are respectively formed in the outer surface of the side frame, and a power switch is arranged on the inner side wall of the side frame. The cubic star frame based on 3D printing adopts a selective laser melting metal 3D printing technology, the structural strength of the cubic star frame is up to 500MPa, the weight of the cubic star frame is half of that of a traditional method, the design and manufacture period is shortened, and the cubic star frame based on 3D printing can be more suitable for strict requirements of a spacecraft on load quality on the basis of realizing that the original cubic star frame is loaded with different functional loads.
Description
Technical Field
The invention relates to the technical field of cuboids, in particular to a cuboid frame based on 3D printing.
Background
With the continuous development of the rapid development of the microelectronic and micromechanical technologies, the microsatellite has been rapidly developed, wherein the development of the cube satellite is particularly focused, and the microsatellite is widely applied to the ground remote sensing, the communication application and even the deep space exploration. Particularly, as the functional density of cuboids continues to increase, and their cost is low, more and more satellite projects are being performed in cuboids.
The cube satellite is a small satellite which is widely used in universities to carry out aerospace scientific research and education internationally, has the characteristics of low cost, high functional density, short development period and quick in orbit entry, and can realize monitoring on oceans, atmospheric environments, ships, aviation aircrafts and the like by forming constellations through networking.
The cubic star frame is used for loading cubic star parts and loads, the mechanical structural part of the cubic star frame is made of aviation aluminum alloy, parts need to be machined and assembled, the assembly precision is high, the quality stability and the like of the common cubic star frame are required to be improved, and the common cubic star frame is high in cost.
The 3D printing technology is a rapid forming technology which develops rapidly and is widely applied to industries such as automobile manufacturing, aerospace and medical treatment. The use of metal 3D printing technology to manufacture the cubic star frame has advantages in terms of structural weight, processing cycle, structural strength, etc.
Disclosure of Invention
Aiming at the defects of the prior art, the invention provides a cubic star frame based on 3D printing, and the novel process concept is adopted to integrate the machining of parts, so that the cubic star has a simple structure, low cost and strong operability, and the problems provided by the background art are solved.
In order to achieve the purpose, the invention provides the following technical scheme: the utility model provides a cube star frame based on 3D prints, includes side frame and connecting screw, still includes fixed station and solar cell panel, the internal connection of side frame has 4 fixed stations, the surface and the connecting screw of fixed station are connected, connecting screw's surface has cup jointed the circuit board, big circular hole and small circle hole have been seted up respectively to the surface of side frame.
Preferably, the inner side wall of the side frame is provided with a power switch.
Preferably, the side frame is formed by a rectangular beam.
Preferably, the bottom of the side frame is provided with a switch pin.
Preferably, the side frames are made of a high-strength aluminum alloy material.
Preferably, the number of the large circular holes is four, and four small circular holes are arranged around each large circular hole.
Preferably, the frame is integrally formed using a selective laser melting metallic 3D printing technique.
Preferably, the circuit board is provided with a copper column.
Compared with the prior art, the invention provides a cubic star frame based on 3D printing, which has the following beneficial effects:
this cube star frame based on 3D prints, only use 3D to print selective laser melting technique, its structural strength is up to 500MPa, and weight is half of traditional approach, the design manufacturing cycle shortens, on the basis of realizing that original cube star frame loads different functional loads, more can adapt to the strict requirement of spacecraft to the load quality, the machining integration of part becomes the integration simultaneously, make the cube star simple structure, the cost is lower and the maneuverability is strong, and copper post on the circuit board supports the multi-plate installation, make the installation more succinct high-efficient, the function is more diversified.
Drawings
FIG. 1 is a schematic structural view of the invention without a solar panel;
FIG. 2 is a schematic view of the structure of the present invention for mounting a solar panel;
FIG. 3 is a schematic diagram of a copper pillar structure according to the present invention.
In the figure: 1. a side frame; 2. a fixed table; 3. connecting a screw rod; 4. a large circular hole; 5. a power switch; 6. a circuit board; 7. a switch pin; 8. a small circular hole; 9. a solar panel; 10. and a copper pillar.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1-3, a cube star frame based on 3D printing includes a side frame 1 and a connecting screw rod 3, and further includes a fixing table 2 and a solar cell panel 9, the side frame 1 is connected with 4 fixing tables 2, the surface of the fixing table 2 is connected with the connecting screw rod 3, the outer surface of the connecting screw rod 3 is sleeved with a circuit board 6, the circuit board 6 can be fixed on the connecting screw rod 3, and the installation height of the circuit board 6 can be parameterized. Copper post 10 on circuit board 6 supports the installation of many boards for the installation is succinct more high-efficient, and the function is more diversified, side frame 1's surface is established respectively and has been seted up big circular hole 4 and small circular hole 8.
In the invention, the inner side wall of the side frame 1 is provided with a power switch 5, the power switch 5 is connected with a power supply, and when the cube star is in a working state, the cube star is turned on.
In the present invention, the side frame 1 is formed of a rectangular beam.
In the invention, the bottom of the side frame 1 is provided with a switch needle 7.
In the invention, the side frame 1 is made of high-strength aluminum alloy materials, so that the structural strength is enhanced, compared with a cubic star frame with the same size and specification, the mass is reduced by half, and the emission efficiency is increased.
In the invention, the number of the large circular holes 4 is four, and four small circular holes 8 are arranged around each large circular hole 4, so that the quality of the frame is further reduced, and meanwhile, the solar cell panel 9 is fixed on the surface of the side frame 1 through the four small circular holes 8.
In the invention, the whole frame is made by adopting a 3D printing technology of selective laser melting metal.
In the invention, the circuit board 6 is provided with the copper columns 10, so that multi-board installation can be realized, and meanwhile, the installation of each circuit board 6 can be separated through the copper columns 10.
The stationary table 2 may further improve the stability of the circuit board 6.
The cubic star frame based on metal 3D printing is a cubic star structure of a 1U standard unit, the frame is cubic, a side rod is slightly higher than a cross beam, a basic unit is 1U, and metal 3D printing of the cubic frame based on the 1U unit, such as 2U, 3U and the like can also be realized. The cube-star frame serves to carry the circuit board 6.
The frame as a whole comprises six facing surfaces, of which the outer four surfaces are used for mounting solar panels 9 which convert sunlight into electric energy to charge the storage battery pack for supplying power to the satellite load.
Four apex angles of lateral surface set up 4 small circular holes 8 respectively, are used for fixed solar cell panel 9.
In comparison, the original machining frame comprises a plurality of parts to guarantee the stability of the cube star. The frame of metal 3D printing adopts an integrated idea, only a 3D printing selective laser melting technology is used, the additive manufacturing step is realized by fusing the parts, the manufacturing is carried out on the supporting plate, the metal powder is completely melted under the thermal action of a laser beam and is cooled and solidified to be formed, the laser wavelength of 1064nm is selected to improve the utilization rate of laser energy when the 3D printing parts are manufactured, the used metal powder is completely melted under the high energy density of the laser, the metal powder can be metallurgically welded with solid metal to be formed after heat dissipation and cooling, then according to the provided three-dimensional CAD model layered slicing information, the scanning system controls the laser beam to act on the powder in the area with the forming, after the scanning of a layer is finished, the piston in the piston cylinder can descend by the distance of one layer, and then the powder feeding system conveys a certain amount of metal powder, and (3) spreading the powder with a layer thickness by a roller of the powder spreading system to deposit the powder on the formed layer, and then repeating the 2 forming processes until all the sliced layers of the three-dimensional CAD model are scanned. Comprises a main frame, a cavity for mounting the PCB is arranged in the main frame, the front and back directions of the main frame comprise a first direction and a second direction, the side surfaces of the main frame comprise a third direction and a fourth direction, and the upper and lower surfaces of the main frame comprise a fifth direction and a sixth direction.
As the SLM mode is selected for printing, an additional supporting structure is required to be added for protection in the whole printing process, and deformation of parts is organized.
In the SLM printing process, the internal stress of the material can be regarded as acting and forming, the whole process can be simulated by using the theory based on the inherent strain, and the SLM forming process is the plastic strain epsilonpThermal strain epsilonτAnd phase change of epsilonxThe coupling relationship between various strains is shown in the following formula.
ε*＝εp+ετ+ετ
In the SLM process, when the laser melts the metal powder, the temperature rises from T to T0,T0>Tm,TmThe material melting point is considered, the influence of the phase change of the material particles in stress is considered to be small in the whole process, the process can be simplified, the phase change is not considered to be generated in the process, the elasticity is zero after the temperature of the material exceeds the melting point, and the thermal strain epsilon isτThe following formula is changed, wherein alpha is the thermal expansion coefficient of the material.
ετ＝α(T0-T)
In the metal material elastic-plastic theory, the criterion for determining the yield of the material can be determined according to the Von-Mises criterion, which considers that when the equivalent stress of a single structure is greater than the yield strength of the material, the material generates yield deformation, as shown in the following formula:
above formula sigmax、σy、σzThree principal stresses, σ, respectivelysFor the material yield limit, 3D printing simulation is performed on the design scheme because deformation and stress concentration are generated in the 3D printing process.
It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, the use of the verb "comprise a" to define an element does not exclude the presence of another, same element in a process, method, article, or apparatus that comprises the element.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (8)
1. The utility model provides a cube star frame based on 3D prints, includes side frame and connecting screw, its characterized in that: still include fixed station and solar cell panel, the internal connection of side frame has 4 fixed stations, the surface and the connecting screw rod of fixed station are connected, the circuit board has been cup jointed to connecting screw rod's surface, big circular hole and small circle hole have been established respectively to side frame's surface.
2. A cube-star framework based on 3D printing according to claim 1, characterized in that: and a power switch is arranged on the inner side wall of the side frame.
3. A cube-star framework based on 3D printing according to claim 1, characterized in that: the side frame is formed by a rectangular beam.
4. A cube-star framework based on 3D printing according to claim 1, characterized in that: and a switch needle is arranged at the bottom of the side frame.
5. A cube-star framework based on 3D printing according to claim 1, characterized in that: the side frames are made of a high-strength aluminum alloy material.
6. A cube-star framework based on 3D printing according to claim 1, characterized in that: the number of the large circular holes is four, and four small circular holes are arranged around each large circular hole.
7. A cube-star framework based on 3D printing according to claim 1, characterized in that: the frame is integrally made by a 3D printing technology of selective laser melting metal.
8. A cube-star framework based on 3D printing according to claim 1, characterized in that: and the circuit board is provided with a copper column.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110341545.9A CN112896559A (en) | 2021-03-30 | 2021-03-30 | Cube star frame based on 3D prints |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110341545.9A CN112896559A (en) | 2021-03-30 | 2021-03-30 | Cube star frame based on 3D prints |
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| CN112896559A true CN112896559A (en) | 2021-06-04 |
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| CN202110341545.9A Pending CN112896559A (en) | 2021-03-30 | 2021-03-30 | Cube star frame based on 3D prints |
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Citations (6)
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|---|---|---|---|---|
| US20160190978A1 (en) * | 2014-12-31 | 2016-06-30 | Echostar Technologies L.L.C. | Solar powered satellite system |
| CN207517249U (en) * | 2017-07-17 | 2018-06-19 | 北京九天微星科技发展有限公司 | Cube star frame, cube star and cube star model |
| WO2018147760A1 (en) * | 2017-02-09 | 2018-08-16 | Общество с ограниченной ответственностью "Даурия - спутниковые технологии" | Micro class earth remote sensing spacecraft |
| CN108482710A (en) * | 2018-03-19 | 2018-09-04 | 西北工业大学 | A kind of 2U cubes of star structure |
| CN108528761A (en) * | 2018-03-19 | 2018-09-14 | 西北工业大学 | A kind of 12U cubes of star structure |
| CN210804952U (en) * | 2019-09-29 | 2020-06-19 | 南京理工大学 | Ground education satellite capable of realizing cube function |
-
2021
- 2021-03-30 CN CN202110341545.9A patent/CN112896559A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20160190978A1 (en) * | 2014-12-31 | 2016-06-30 | Echostar Technologies L.L.C. | Solar powered satellite system |
| WO2018147760A1 (en) * | 2017-02-09 | 2018-08-16 | Общество с ограниченной ответственностью "Даурия - спутниковые технологии" | Micro class earth remote sensing spacecraft |
| CN207517249U (en) * | 2017-07-17 | 2018-06-19 | 北京九天微星科技发展有限公司 | Cube star frame, cube star and cube star model |
| CN108482710A (en) * | 2018-03-19 | 2018-09-04 | 西北工业大学 | A kind of 2U cubes of star structure |
| CN108528761A (en) * | 2018-03-19 | 2018-09-14 | 西北工业大学 | A kind of 12U cubes of star structure |
| CN210804952U (en) * | 2019-09-29 | 2020-06-19 | 南京理工大学 | Ground education satellite capable of realizing cube function |
Non-Patent Citations (1)
| Title |
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| 范晓明等: "《金属凝固理论与技术》", 31 December 2019 * |
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Application publication date: 20210604 |
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