CN216979340U - Integrated all-metal reflector assembly based on additive manufacturing - Google Patents
Integrated all-metal reflector assembly based on additive manufacturing Download PDFInfo
- Publication number
- CN216979340U CN216979340U CN202123204066.7U CN202123204066U CN216979340U CN 216979340 U CN216979340 U CN 216979340U CN 202123204066 U CN202123204066 U CN 202123204066U CN 216979340 U CN216979340 U CN 216979340U
- Authority
- CN
- China
- Prior art keywords
- reflector
- back plate
- additive manufacturing
- bottom plate
- supporting bottom
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Landscapes
- Optical Elements Other Than Lenses (AREA)
Abstract
The utility model belongs to the technical field of space optical remote sensors, and relates to an integrated all-metal reflector component based on additive manufacturing. The problems that the traditional large-aperture aluminum alloy reflector is low in rigidity, sensitive to assembly stress, low in light weight rate and the like are solved. The honeycomb back plate and the supporting bottom plate are integrally printed and formed through additive manufacturing; the honeycomb back plate is composed of lattice units, the specific rigidity of the reflector component can be effectively ensured due to the fact that the lightweight rate and the rigidity of the lattice structure are high, meanwhile, the lattice structure is also a high-efficiency heat exchange structure, the temperature distribution of the reflector body is more uniform, and the thermal stability of the reflector is improved; the reflector is integrally arranged on the honeycomb back plate, and the optical axis of the reflector is vertical to the honeycomb back plate; the supporting bottom plate is integrally arranged at the bottom of the honeycomb back plate, the bottom surface of the supporting bottom plate is a reflector component mounting surface and is parallel to the optical axis of the reflector, and the distance between the bottom surface of the supporting bottom plate and the optical axis of the reflector is larger than the diameter of the reflector.
Description
Technical Field
The utility model belongs to the technical field of space optical remote sensors, and relates to an integrated all-metal reflector component based on additive manufacturing.
Background
With the rapid development of space-to-ground observation technology, the reflector is used as a core element of a high-resolution space optical remote sensor, and the surface shape precision of the reflector directly influences the imaging quality of an optical system. The high-rigidity design is beneficial to obtaining high surface shape precision of the reflector, and meanwhile, the reflector is ensured to have sufficiently high fundamental frequency in the carrying and launching processes; the high-stability design reduces the sensitivity of the reflector to external stress and a damp and hot environment, and improves the surface shape precision of the reflector under the on-orbit working condition; the high lightweight design can then reduce the reflector weight by a wide margin to reduce the emission cost. Common materials for the space reflector include beryllium, aluminum alloy, microcrystalline glass, quartz, ultra-low expansion fused silica (ULE), silicon carbide (SiC), and the like.
The aluminum alloy reflector has higher specific rigidity and excellent machining performance, and has certain advantages in the aspects of machining cost and period compared with reflectors made of other materials, so that the aluminum alloy reflector is widely applied, particularly in the aspect of infrared optics. The traditional aluminum alloy reflector is formed by machining (shown in figure 1), and is limited by the machining process, so that the aluminum alloy reflector has the following problems: 1) by adopting a traditional turning and milling process, the back of the aluminum reflector which is usually processed is of an open structure. For small aperture mirrors, the impact is limited; when the aperture of the reflector is increased, the integral rigidity is difficult to be greatly improved, and the thickness of the reinforcing rib is larger usually for ensuring the integral rigidity of the reflector, so that the improvement of the light weight rate of the reflector is not facilitated. 2) Along with the increase of the caliber, the aluminum reflector is extremely sensitive to assembly stress due to insufficient rigidity, so that the design difficulty of the supporting structure is increased.
Common large-aperture reflector materials ULE and SiC generally face the problem that the materials of the reflector and a support structure are inconsistent, the thermal matching performance is poor, and extremely strict requirements are provided for the stability of the reflector and the support structure.
Disclosure of Invention
The large-aperture aluminum alloy reflector aims at solving the problems that the traditional large-aperture aluminum alloy reflector is low in rigidity, sensitive to assembly stress, low in light weight rate and the like. The utility model provides an integrated all-metal reflector component based on additive manufacturing, which is characterized in that a reflector and a support structure are integrally designed and integrally formed by adopting an additive manufacturing technology, so that the contradiction among the structural rigidity, the light weight rate and the processing performance of the reflector is balanced.
The technical scheme adopted by the utility model is as follows:
the integrated all-metal reflector component based on additive manufacturing is characterized in that: the honeycomb back plate and the supporting bottom plate are integrally printed and formed through an additive manufacturing technology;
the honeycomb back plate is composed of lattice units, the specific rigidity of the reflector component can be effectively ensured due to the fact that the lightweight rate and the rigidity of the lattice structure are high, meanwhile, the lattice structure is also a high-efficiency heat exchange structure, the temperature distribution of the reflector body is more uniform, and the thermal stability of the reflector is improved;
the reflector is integrally arranged on the honeycomb back plate, and the optical axis of the reflector is vertical to the honeycomb back plate;
the supporting base plate is integrally arranged at the bottom of the honeycomb back plate, the bottom surface of the supporting base plate is a reflector component mounting surface and is parallel to the optical axis of the reflector, and the distance between the bottom surface of the supporting base plate and the optical axis of the reflector is larger than the diameter of the reflector.
Further, the parallelism between the optical axis of the reflector and the bottom surface of the supporting base plate is better than 10 μm, and the bottom surface of the supporting base plate can be used as the mounting reference surface of the reflector component.
Further, in order to improve the rigidity of the assembly, the honeycomb back plate is obtained through a topological optimization method, so that the honeycomb back plate has extremely high specific rigidity.
Furthermore, two mounting holes are formed in the supporting bottom plate, and the reflector component is fixedly connected with other frames through the two mounting holes.
Furthermore, the diameter of the reflector is 150mm, the center thickness is 10mm, the reflector panel is guaranteed to have enough high rigidity, and the requirements of processing and polishing on local rigidity are met. The top surface is a reflecting surface, and the shape is determined according to an optical reflecting surface curved surface equation. The distance between the bottom surface of the supporting bottom plate and the optical axis of the reflector is larger than 200mm, and the influence of assembly stress on surface shape precision is reduced.
Further, the materials of the reflector, the honeycomb back plate and the supporting bottom plate are all AlSi10 Mg.
Compared with the prior art, the integrated all-metal reflector component based on additive manufacturing has the following advantages:
1) the reflector and the reflector supporting structure are integrally designed and manufactured without assembly, and the assembly stress generated in the assembly process of the reflector and the supporting structure is avoided. Meanwhile, the reflector and the reflector supporting structure are made of the same material, so that the problem of thermal characteristic matching caused by the fact that the materials of the reflector and the reflector are different is solved.
2) The mounting surface of the reflector component is arranged on the support bottom plate, and the mounting stress direction is along the radial direction of the reflector (the radial rigidity of the reflector is far greater than the axial rigidity of the reflector); meanwhile, a force transmission path is from the supporting bottom plate to the reflector through the honeycomb back plate, and the path is longer, so that the influence of assembly stress on the surface shape precision is reduced.
3) Compared with the traditional machining method, the additive manufacturing technology is less affected by the structural form, and a lattice structure with higher light weight rate can be obtained through a topological optimization technology, so that the specific rigidity of the reflector component is further improved.
Drawings
FIG. 1 is a three-dimensional structural view of a conventional aluminum alloy reflector;
fig. 2 is a three-dimensional structure diagram of an integrated all-metal mirror assembly based on additive manufacturing.
The reference numbers in the figures are: 1-reflector, 2-honeycomb backboard, 3-supporting bottom board, 101-reflecting surface, 201-lattice unit, 301-mounting hole, 302-bottom surface of supporting bottom board.
Detailed Description
The utility model conception of the utility model is as follows:
the utility model provides an integrated all-metal reflector assembly based on additive manufacturing, which is characterized in that a reflector and a reflector supporting structure are integrally designed and integrally formed, and the problems of mismatch of thermal characteristics of traditional aluminum alloy reflectors and supporting structure materials, large assembly stress and the like are solved. The dot-matrix honeycomb back plate obtained by adopting bionic topology optimization enables the reflector to have higher lightweight rate and specific stiffness. Meanwhile, the good heat exchange performance of the lattice structure can improve the thermal stability of the reflector.
The utility model is further described with reference to the following figures and specific embodiments.
As can be seen from fig. 2, the integrated all-metal mirror assembly based on additive manufacturing in the present embodiment includes a mirror 1 and a support structure, where the support structure includes a honeycomb back plate 2 and a support bottom plate 3, and in order to reduce the assembly stress generated during the assembly of the mirror 1 and the support structure, in the present embodiment, the mirror 1, the honeycomb back plate 2 and the support bottom plate 3 are integrally printed and formed by an additive manufacturing technology; meanwhile, the reflector 1, the honeycomb back plate 2 and the supporting bottom plate 3 are made of the same material, so that the problem of thermal characteristic matching caused by the fact that the reflector and the supporting structure are made of different materials is solved. The materials of the reflector 1, the honeycomb back plate 2 and the supporting bottom plate 3 in the embodiment are all AlSi10 Mg.
As can be seen from the figure, the honeycomb back plate 2 is composed of the lattice units 201, and the specific stiffness of the reflector component can be effectively ensured due to the fact that the lattice structure is high in both the lightweight rate and the stiffness, and meanwhile, the lattice structure is also a high-efficiency heat exchange structure, so that the temperature distribution of the reflector body is more uniform, and the thermal stability of the reflector is improved; in order to further improve the specific rigidity of the reflector component, a lattice structure with higher light weight rate can be obtained by a topological optimization method, and the honeycomb back plate is optimized.
The reflector is integrally arranged on the honeycomb back plate, and the optical axis of the reflector is perpendicular to the honeycomb back plate, so that the mounting stress direction is along the radial direction of the reflector; in this embodiment, the diameter of the reflector is 150mm, and the center thickness is 10mm, so that the reflector panel has high enough rigidity, and the requirements of processing and polishing on local rigidity are met. The top surface is a reflecting surface 101, and the shape is determined according to the curved surface equation of the optical reflecting surface.
The supporting bottom plate 3 is integrally arranged at the bottom of the honeycomb back plate 2, the bottom surface 302 of the supporting bottom plate is a mirror component mounting surface, in order to increase a force transmission path and reduce assembly stress, the distance between the bottom surface 302 of the supporting bottom plate and the optical axis of the mirror 1 can be set to be larger than the diameter of the mirror, and the force transmission path can also be increased by increasing the height of the honeycomb back plate 2. The distance between the bottom surface 302 of the support base and the optical axis of the mirror 1 is in this embodiment larger than 200 mm. The optical axis of the mirror 1 is parallel to the bottom surface 302 of the support base, the parallelism is better than 10 μm, and the bottom surface 302 of the support base can be used as the mounting reference surface of the mirror assembly. As can also be seen from the figure, the supporting base plate 3 is provided with two mounting holes 301, and the mirror assembly is fixedly connected with other frames through the two mounting holes 301.
The reflector assembly balances the contradiction among the structural rigidity, the light weight rate and the processing performance of the reflector, has the advantages of high rigidity, low assembly stress and light weight, and can be widely applied to optical loads in the aerospace field or the aviation field.
Claims (6)
1. An integrated all-metal mirror assembly based on additive manufacturing, comprising: the honeycomb back plate structure comprises a reflector (1), a honeycomb back plate (2) and a supporting bottom plate (3), wherein the reflector (1), the honeycomb back plate (2) and the supporting bottom plate (3) are integrally printed and formed through an additive manufacturing technology;
the honeycomb back plate (2) is composed of lattice units;
the reflector (1) is integrally arranged on the honeycomb back plate (2), and the optical axis of the reflector (1) is vertical to the honeycomb back plate (2);
the supporting bottom plate (3) is integrally arranged at the bottom of the honeycomb back plate (2), and the bottom surface (302) of the supporting bottom plate is a reflector component mounting surface and is parallel to the optical axis of the reflector (1); the distance between the bottom surface (302) of the support base plate and the optical axis of the reflector is larger than the diameter of the reflector (1).
2. The integrated all-metal mirror assembly based on additive manufacturing of claim 1, wherein: the parallelism between the optical axis of the reflector (1) and the bottom surface (302) of the supporting bottom plate is better than 10 mu m.
3. The integrated all-metal mirror assembly based on additive manufacturing of claim 2, wherein: and obtaining the cellular back plate by a topology optimization method.
4. The integrated all-metal mirror assembly based on additive manufacturing of claim 3, wherein: two mounting holes (301) are formed in the supporting bottom plate (3), and the mounting holes (301) are used for being fixedly connected with other frames.
5. The integrated all-metal mirror assembly based on additive manufacturing of any one of claims 1-4, wherein: the diameter of the reflector (1) is 150mm, and the center thickness is 10 mm; the distance between the bottom surface (302) of the supporting bottom plate and the optical axis of the reflector (1) is larger than 200 mm.
6. The integrated all-metal mirror assembly based on additive manufacturing of claim 5, wherein: the reflector (1), the honeycomb back plate (2) and the supporting bottom plate (3) are all made of AlSi10 Mg.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202123204066.7U CN216979340U (en) | 2021-12-17 | 2021-12-17 | Integrated all-metal reflector assembly based on additive manufacturing |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202123204066.7U CN216979340U (en) | 2021-12-17 | 2021-12-17 | Integrated all-metal reflector assembly based on additive manufacturing |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN216979340U true CN216979340U (en) | 2022-07-15 |
Family
ID=82347438
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202123204066.7U Active CN216979340U (en) | 2021-12-17 | 2021-12-17 | Integrated all-metal reflector assembly based on additive manufacturing |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN216979340U (en) |
-
2021
- 2021-12-17 CN CN202123204066.7U patent/CN216979340U/en active Active
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN106291867B (en) | A kind of integrated speculum of support | |
| CN108594396A (en) | A kind of quasi- zero thermal expansion space optical remote sensor support construction and method | |
| CN111045186A (en) | SIC reflector with supporting reference structure | |
| CN110967798A (en) | Low-temperature infrared lens supporting device based on radial flexible unloading | |
| CN112782831A (en) | Metal reflector based on additive manufacturing high integration and processing method thereof | |
| CN105445894A (en) | Secondary mirror supporting structure | |
| CN216979340U (en) | Integrated all-metal reflector assembly based on additive manufacturing | |
| CN104898403B (en) | A kind of space application and super steady optical reference chamber can be carried | |
| CN109387997A (en) | A kind of high rigidity lightweight space camera lens barrel and its vibrostability test method | |
| CN111308644A (en) | Silicon carbide reflector | |
| CN116266000A (en) | Integrated all-metal reflecting mirror assembly based on additive manufacturing | |
| CN115981108A (en) | Radial passive athermal structure of telescope system primary mirror | |
| Petrovsky et al. | 2.7-meter-diameter silicon carbide primary mirror for the SOFIA telescope | |
| CN114355554A (en) | Aerospace lightweight reflector assembly and assembling method | |
| CN117826395A (en) | Large-caliber telescope spliced mirror surface supporting device with flexible guide side support and supporting method | |
| CN209895070U (en) | Reflecting mirror with I-shaped structure | |
| CN214751048U (en) | Metal reflector based on high integration of additive manufacturing | |
| CN205301684U (en) | Secondary mirror bearing structure | |
| Woody et al. | Panel options for large precision radio telescopes | |
| CN216979341U (en) | Double-honeycomb reflector structure based on additive manufacturing technology | |
| CN109273862B (en) | Carbon fiber parabolic antenna and focusing assembly method thereof | |
| CN116338840A (en) | Dual-honeycomb reflector structure based on additive manufacturing technology | |
| Ealey et al. | Highly adaptive integrated meniscus primary mirrors | |
| Jian et al. | Structure design of 1.2 m high lightweight primary mirror blank | |
| CN113701013B (en) | Kinematics supporting mechanism suitable for long and thin structure |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |