CN108957685B - Method for supporting and fixing reflector - Google Patents
Method for supporting and fixing reflector Download PDFInfo
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- CN108957685B CN108957685B CN201811007765.2A CN201811007765A CN108957685B CN 108957685 B CN108957685 B CN 108957685B CN 201811007765 A CN201811007765 A CN 201811007765A CN 108957685 B CN108957685 B CN 108957685B
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B7/00—Mountings, adjusting means, or light-tight connections, for optical elements
- G02B7/18—Mountings, adjusting means, or light-tight connections, for optical elements for prisms; for mirrors
- G02B7/182—Mountings, adjusting means, or light-tight connections, for optical elements for prisms; for mirrors for mirrors
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Abstract
The invention provides a reflector supporting and fixing method, and belongs to the technical field of space optical remote sensors. The method comprises the following steps: the reflector is fixed on a support frame assembly, the flexible support is filled with damping glue and solidified, the flexible support comprises a first connecting part and a second connecting part, the first connecting part is used for being connected with the support frame assembly, the second connecting part is used for being connected with a lens main body frame, the first connecting part and the second connecting part are connected through a first flexible hinge and a second flexible hinge which are orthogonally arranged, the rotating directions of the first flexible hinge and the second flexible hinge are perpendicular to the optical axis direction of the reflector, a plurality of glue injection grooves are formed in the first flexible hinge and the second flexible hinge, and the glue injection grooves are used for filling the damping glue so that the flexible hinge has damping in the rotating tangential direction; the flexible support through injecting glue is fixed with the support frame assembly and the lens main body frame. The invention realizes the flexible support of the reflector and avoids the structural damage caused by vibration.
Description
Technical Field
The invention relates to a reflector supporting and fixing method, and belongs to the technical field of space optical remote sensors.
Background
The support structure of the reflector of the space remote sensor generally comprises a metal support frame and at least three pressing blocks arranged on the support frame, wherein the metal support frame is used for supporting the reflector, and the pressing blocks are used for fixing the support frame and the reflector.
In aerospace remote sensors, small-caliber reflectors are generally supported by rigid, semi-flexible and flexible structures. The existing flexible supporting structure usually uses flexible elements to realize flexible connection between the mirror and the frame, for example, uses a flexible press block to directly connect the mirror and the frame, or uses a press block and a flexible element padded between the mirror and the supporting frame to realize flexible connection between the mirror and the frame.
Generally, the higher the rigidity of a supporting structure of the reflector component is, the higher the fundamental frequency is under the dynamic condition, the smaller the stress response amplitude is, and the safer the structure is; however, as the structural rigidity increases, the forced displacement unloading capacity and the thermal deformation unloading capacity are deteriorated. The existing flexible supporting method is easy to generate structural damage under the vibration condition due to the fact that a supporting structure is large in flexibility, small in rigidity and poor in anti-seismic performance.
Disclosure of Invention
Aiming at the problems in the prior art, the invention provides a reflector supporting and fixing method, which realizes flexible support of a reflector, can reduce stress response of the reflector and a supporting and fixing device in a vibration environment, and avoids structural damage caused by vibration.
In order to achieve the above purpose, the invention comprises the following technical scheme:
a reflector supporting and fixing method comprises the following steps:
fixing a reflector on a support frame assembly, filling damping glue into a flexible support, and curing to obtain a glue-injected flexible support, wherein the flexible support comprises a first connecting part and a second connecting part, the first connecting part is used for being connected with the support frame assembly, the second connecting part is used for being connected with a lens main body frame, the first connecting part and the second connecting part are connected through a first flexible hinge and a second flexible hinge which are orthogonally arranged, the rotating directions of the first flexible hinge and the second flexible hinge are perpendicular to the optical axis direction of the reflector, a plurality of glue injection grooves are formed in the first flexible hinge and the second flexible hinge, and the glue injection grooves are used for filling the damping glue so that the flexible hinge has damping in the rotating tangential direction;
and the support frame assembly and the lens main body frame are fixedly connected through the flexible support for injecting glue.
In an optional embodiment, hold in the palm the frame subassembly including holding in the palm frame, three briquetting and six films, hold in the palm the frame and be annular frame, and the periphery has three flange along circumference equipartition, be equipped with annular layer board and edge on holding in the palm the frame radial extension and run through hold in the palm the first through-hole of frame lateral wall, be equipped with on the annular layer board and follow hold in the palm the second through-hole of frame axial extension, be equipped with on the briquetting and follow hold in the palm the third through-hole of frame axial extension, fix the speculum on holding in the palm the frame subassembly earlier, include:
determining three positions on the reflector, which are fixed with the support frame, according to the positions of the three flanges;
respectively padding one film on the upper surface and the lower surface of the determined three positions on the reflector, placing the reflector to a preset position above the annular supporting plate, and forming an axial glue injection gap between the reflector and the annular supporting plate;
and assembling the pressing blocks and the flanges in a one-to-one correspondence manner, and filling adhesive glue through the first through hole, the second through hole and the third through hole respectively to fix the reflector and the support frame assembly.
In an alternative embodiment, the film is a polyimide aluminum-plated film with a thickness of 0.02-0.06 mm.
In an optional embodiment, an annular groove is further formed in the inner side wall of the support frame, and the first through hole is located between the annular supporting plate and the annular groove and is communicated with the annular groove.
In an optional embodiment, a first end of the pressing block is connected to the flange, a second end of the pressing block is provided with a first joint, a first connecting portion of the flexible support is provided with a second joint, and the flexible support through the glue injection is fixedly connected to the supporting frame assembly and the lens main body frame, and the optical lens module includes:
assembling the first joint and the second joint, and inserting a gap gasket at the assembling position to tightly plug and fix the first joint and the second joint to obtain an assembling component with the pressing block and the flexible support at the initial position;
then pre-fixing the obtained assembly to the lens body frame;
after the position and the angle of the reflector are adjusted, fixing a second connecting part of the glue-injected flexible support with the lens main body frame;
removing the gap gasket, and forming a plurality of first gaps and a plurality of second gaps between the first joint and the second joint, wherein the first gaps and the second gaps are vertical;
and filling adhesives into the first gap and the second gap to realize the fixed connection of the support frame assembly and the flexible support for injecting the glue.
In an optional embodiment, the fixing the flexible support for injecting the glue to the lens main body frame includes: the relative position of the second connecting part and the lens main body frame is adjusted adaptively through a flexible support fixing assembly, and the second connecting part and the lens main body frame are fixedly connected.
In an optional embodiment, the flexible support fixing assembly includes an adjusting spacer, three fasteners, three spherical washers and three translation washers, the second connecting portion is provided with three assembling grooves, the connecting line of the three assembling grooves is triangular, the assembling grooves are stepped through grooves, one assembling groove corresponds to one spherical washer, one fastener and one translation washer, the translation washer is located at the large end of the assembling groove, the spherical washer is sleeved in the translation washer, the fasteners penetrate through the spherical washer and the translation washer to realize the fixed connection of the second connecting portion and the lens main body frame, the adjusting spacer is of a triangular ring structure, three protrusions are arranged at three vertex angles, through holes are arranged on the protrusions, and the three through holes correspond to the three installing grooves one by one, and the relative position of the second connecting part and the lens main body frame is adaptively adjusted by trimming the thickness and the inclination angle of the adjusting gasket and adjusting the eccentricity of the translation gasket.
In an optional embodiment, the first joint is provided with a plurality of third grooves and a plurality of fourth grooves which are parallel to each other, the third grooves and the fourth grooves have opposite opening directions and are arranged in a staggered manner, the second joint is provided with a cavity with openings at two ends, a plurality of first bumps are arranged on a first surface of the cavity, a plurality of second bumps are arranged on a second surface of the cavity, the first surface and the second surface are opposite, when the first joint is assembled, the first joint is accommodated in the cavity, the first bumps correspond to the third grooves one by one and are located in the corresponding third grooves to form first gaps and second gaps with the third grooves, and the second bumps correspond to the fourth grooves one by one and are located in the corresponding fourth grooves to form the first gaps and second gaps with the fourth grooves.
In an optional embodiment, the bottoms of the third groove and the fourth groove are respectively provided with a channel extending along the length direction of the grooves, and the bottoms of the channels are uniformly distributed with a plurality of glue solution through holes penetrating through the bottoms of the channels.
In an optional embodiment, a fifth groove extending in the length direction of the first bump is disposed on a side of the first bump away from the first surface, a sixth groove extending in the length direction of the second bump is disposed on a side of the second bump away from the second surface, and the fifth groove and the sixth groove are used for filling adhesive into the first gap and the second gap, and the third groove and the fifth groove are opposite.
The invention has the beneficial effects that:
(1) according to the reflector support fixing method provided by the embodiment of the invention, the press block and the lens main body frame are connected through the flexible support, the first connecting part and the second connecting part of the flexible support are connected through the first flexible hinge and the second flexible hinge which are orthogonal and perpendicular to the optical axis direction, so that the assembly has strong forced displacement and thermal deformation unloading capacity, the flexible support of the reflector is realized, the flexible hinge has rotary tangential damping by filling damping glue in the flexible hinge, the dynamic response amplitude is effectively reduced, the stress response of the structure in a vibration environment is reduced, and the structural damage caused by vibration is avoided;
(2) according to the supporting and fixing method provided by the embodiment of the invention, the pressing block and the flexible support are provided with the adaptive joints, the first gap and the second gap which are vertical to each other are arranged on the joints, and the bonding glue is injected into the gaps through the filling holes, so that the pressing block and the flexible support are connected in a stress-free manner, and the influence of assembly stress on the surface shape of the reflector is avoided;
(3) the support frame is made of carbon fiber toughened silicon carbide ceramic matrix composite, and on one hand, the density is low and is only 2.5g/cm3The structure weight can be effectively reduced; on the other hand, the silicon carbide reflecting mirror has a linear expansion coefficient matched with that of the silicon carbide reflecting mirror, so that the surface shape error caused by temperature change can be better resisted; in addition, the material has high specific strength and good stability, and well meets the requirements of the strength and the stability of a reflector component;
(4) by arranging the annular groove on the inner wall of the support frame, when glue is injected through the first through hole, glue solution flows into the annular groove to form glue spots, the integrity of the glue spots is kept, and the bonding strength of the reflector and the support frame is improved;
(5) the flexible support fixing assembly provided by the embodiment of the invention can adapt to the relative position between the flexible support and the lens main body frame after displacement and angle adjustment, so that the gasket and the positioning pin between the flexible support and the pressing block are ensured to keep proper relative positions after being detached, the glue injection and solidification of the flexible support and the pressing block are facilitated in the later period, and the stress-free assembly of the reflector assembly is realized;
(6) the invention has higher dimensional stability, has the characteristic of universal applicability to the reflector assembly with medium and small calibers, and has wide application range.
Drawings
FIG. 1 is a top view of a mirror support fixture according to an embodiment of the present invention;
FIG. 2 is a cross-sectional view of a reflector supporting and fixing device according to an embodiment of the present invention;
fig. 3 is a schematic front view of a tray according to an embodiment of the present invention;
fig. 4 is a schematic reverse side view of a supporting frame according to an embodiment of the present invention;
FIG. 5 is a schematic structural diagram of a flexible support according to an embodiment of the present invention;
FIG. 6 is a schematic diagram of a compact structure provided in an embodiment of the present invention;
FIG. 7 is a schematic structural view of the assembly of the flexible support and the pressing block with the spacer and the positioning pin removed;
FIG. 8 is a schematic structural diagram of a pressing block and a flexible support provided by an embodiment of the present invention when a gasket and a positioning pin are inserted in an assembling process;
fig. 9 is a schematic view of another perspective structure when a gasket and a positioning pin are inserted in the process of assembling the press block and the flexible support according to the embodiment of the present invention.
Detailed Description
The following detailed description of embodiments of the invention will be made with reference to the accompanying drawings.
Referring to fig. 1, the embodiment of the present invention provides a reflector supporting and fixing device for connecting a reflector 1 with a lens body frame, and is particularly suitable for a reflector with a caliber of not more than 400 mm. As shown in fig. 1 and 2, in the embodiment of the present invention, the reflector 1 is a circular reflector, and the upper and lower surfaces of the periphery are respectively provided with a circle of concave annular bands, the supporting and fixing device includes a supporting frame 2, three pressing blocks 3, six thin films 5, three flexible supports 4 and three sets of flexible support fixing assemblies, as shown in fig. 3 and 4, the supporting frame 2 is an annular frame, and the periphery is uniformly distributed with three flanges 21 along the circumferential direction, an annular supporting plate 22 and a first through hole 24 extending along the radial direction of the supporting frame and penetrating through the side wall of the supporting frame are arranged on the inner side wall of the supporting frame, a second through hole 25 extending along the axial direction of the supporting frame is arranged on the annular supporting plate 22, the three pressing blocks 3 and the three flanges 21 are in one-to-one correspondence and fixed by fasteners, as shown in fig. 2, the thin films 5 are padded on the upper and lower surfaces of the reflector 1 corresponding to the pressing blocks 3, a third through hole 31 extending, the third through holes 31 correspond to the second through holes 25 one by one for filling adhesive to bond the pressing block 3 and the film 5, the first through holes 24 and the second through holes 25 are used for filling adhesive to bond and fix the reflector 1 and the supporting frame 2 or bond the film 5 and the supporting frame 2, the flexible supports 4 correspond to and connect with the pressing block 3 one by one, as shown in fig. 5, the flexible supports 4 include a first connecting portion 4a and a second connecting portion 4b, the first connecting portion 4a is connected with the pressing block 3, the second connecting portion 4b is used for connecting with the lens main body frame, the first connecting portion 4a and the second connecting portion 4b are connected through a first flexible hinge 11a and a second flexible hinge 11b which are orthogonally arranged, the rotation directions of the first flexible hinge 11a and the second flexible hinge 11b are perpendicular, and the rotation directions of the first flexible hinge 11a and the second flexible hinge 11b are perpendicular to the optical axis direction of the reflector 1, the first flexible hinge 11a and the second flexible hinge 11b are respectively provided with a plurality of glue injection grooves 12, the glue injection grooves 12 are used for filling damping glue so as to enable the flexible hinges to have damping in the rotation tangential direction, and the flexible support fixing assembly is used for adaptively adjusting the relative position of the second connecting portion 4b and the lens main body frame and fixing the second connecting portion 4b and the lens main body frame.
Specifically, in the embodiment of the present invention, the film 5 is preferably a polyimide aluminized film, the thickness of which is preferably 0.02-0.06mm, the film is soft and smooth, has a small friction coefficient and a uniform and consistent thickness, and is abutted against the flange surface of the reflector during vibration, so that the shape of the fitting surface of the reflector can be well adapted to fit, the support area is increased, and the friction force of the fitting surface is small in the state where the optical axis is horizontal, which is beneficial to avoiding adverse effects on the surface shape of the reflector.
According to the reflector supporting and fixing device provided by the embodiment of the invention, the press block and the lens main body frame are connected through the flexible support, the first connecting part and the second connecting part of the flexible support are connected through the first flexible hinge and the second flexible hinge which are orthogonal and perpendicular to the optical axis direction, so that the assembly has strong forced displacement and thermal deformation unloading capacity, the flexible support of the reflector is realized, the flexible hinge has rotation tangential damping by filling damping glue in the flexible hinge, the dynamic response amplitude is effectively reduced, the stress response of the structure in a vibration environment is reduced, and the structural damage caused by vibration is avoided.
As shown in fig. 5, in an alternative embodiment, a first connection portion 4a and a second connection portion 4b are connected by a first flexible rotation body 16, a second flexible rotation body 17 and a base 15 which are connected in sequence, a first connection portion is formed at a connection position of the first flexible rotation body 16 and the second flexible rotation body 17, the first flexible rotation body 16 forms the first flexible hinge with the first connection portion as a rotation axis, a second connection portion is formed at a connection position of the second flexible rotation body 17 and the base 15, the second flexible rotation body 17 forms the second flexible hinge with the second connection portion as a rotation axis, and the first connection portion and the second connection portion are both long and perpendicular. The base 15 is provided with a plurality of parallel first vertical plates, the second flexible revolving body 17 is provided with a plurality of first grooves and a plurality of second grooves, the first flexible revolving body 16 is provided with a plurality of parallel second vertical plates 16a, the first grooves are inverted U-shaped grooves, the second grooves are U-shaped grooves, the first vertical plates correspond to the first grooves one by one and are located in the inverted U-shaped grooves, gaps are formed between the first vertical plates and the side walls of the inverted U-shaped grooves to form the glue injection grooves 12, the second vertical plates correspond to the second grooves one by one and are located in the second grooves, and gaps are formed between the second vertical plates and the side walls of the second grooves to form the glue injection grooves 12. In a specific embodiment, the first grooves are communicated to form a zigzag rotary groove, the second grooves are communicated to form a zigzag rotary groove, and the cured redundant damping glue is removed by arranging glue cleaning process holes at the turning positions. In an alternative embodiment, the unconnected portion between the first flexible rotator 16 and the second flexible rotator 17 has a gap of 0.2-0.4mm, and the unconnected portion between the second flexible rotator 17 and the base 15 has a gap of 0.2-0.4 mm;
in an alternative embodiment, as shown in fig. 7-9, a plurality of glue injection grooves 12 on the same flexible hinge are symmetrically arranged with the rotation axis of the flexible hinge as a symmetry axis to realize the symmetric rotation of the flexible hinge.
In an alternative embodiment, as shown in fig. 1, 2 or 6, a first end of the press block 3 is connected to the flange 21, a second end of the press block 3 is connected to the first connecting portion 4a of the flexible support 4, a second end of the press block 3 is provided with a first joint 13a, as shown in fig. 5, the first connecting portion 4a of the flexible support 4 is provided with a second joint 13b, the first joint 13a is matched with the second joint 13b, and as shown in fig. 7, a plurality of first gaps extending in the horizontal direction and a plurality of second gaps extending in the vertical direction are formed after the first joint and the second joint are assembled, and the first joint 13a and/or the second joint 13b are provided with filling holes which are communicated with the first gaps and the second gaps and are used for filling adhesive to realize stress-free connection between the press block and the flexible support. In other embodiments, the first gap and the second gap may also extend obliquely, and the first gap and the second gap are perpendicular; in an alternative embodiment, as shown in fig. 5 and 6, the first tab 13a is provided with a plurality of third grooves 133 and a plurality of fourth grooves 134 in parallel, said third grooves 133 and fourth grooves 134 opening in opposite directions, and are arranged in a staggered manner, the second joint 13b is provided with a cavity with two open ends, a plurality of first lugs 135 are arranged on the first surface of the cavity, a plurality of second protrusions 136 are provided on a second surface of the cavity, the first surface and the second surface being opposite, the first joints 13a are accommodated in the accommodating cavities, the first protrusions 135 correspond to the third grooves 133 one by one and are located in the corresponding third grooves 133, the first gap and the second gap are formed with the third groove 133, the second protrusion 136 corresponds to the fourth groove 134 one by one, and is located in the corresponding fourth groove 134, and forms the first gap and the second gap with the fourth groove 134; further, the groove bottoms of the third groove 133 and the fourth groove 134 are respectively provided with a groove 131 extending along the length direction of the grooves for injecting glue, and the bottoms of the grooves 131 are uniformly distributed with a plurality of glue solution through holes 132 penetrating through the bottoms of the grooves for forming glue spots; one side of the first surface, which is far away from the first surface, of the first bump 135 is provided with a fifth groove 137 extending along the length direction of the first bump, one side of the second surface, which is far away from the second surface, of the second bump 136 is provided with a sixth groove 138 extending along the length direction of the second bump 136, so that glue can be injected, the fifth groove 137 is opposite to the third groove 133 to form a cavity, and during glue injection, bonding glue is filled in the cavity, and the bonding strength of the bonding glue and the cavity is strengthened after the bonding glue is cured.
In the supporting and fixing device provided by this embodiment, during assembly, a gasket is inserted between the pressing block 3 and the flexible support 4 at a position corresponding to the first gap and the second gap, so as to determine an initial position between the pressing block 3 and the flexible support 4, and after the pressing block 3 and the flexible support 4 are fixed respectively, the gasket is removed, so that the first gap and the second gap are formed between the pressing block 3 and the flexible support 4; in an alternative embodiment, the pressing block 3 and the flexible support 4 are provided with corresponding positioning holes, and the height position of the first joint 13a in the cavity is determined by positioning pins inserted in the positioning holes.
According to the supporting and fixing device provided by the embodiment of the invention, the pressing block and the flexible support are provided with the adaptive joints, the first gap and the second gap which are vertical to each other are arranged on the joints, and the bonding glue is injected into the gaps through the filling holes, so that the pressing block and the flexible support are connected in a stress-free manner, and the influence of assembly stress on the surface shape of the reflector is avoided.
In an alternative embodiment, the supporting frame 2 is a carbon fiber toughened silicon carbide ceramic matrix composite material, and on one hand, the density is lower and is only 2.5g/cm3The structure weight can be effectively reduced; on the other hand, the silicon carbide reflecting mirror has a linear expansion coefficient matched with that of the silicon carbide reflecting mirror, so that the surface shape error caused by temperature change can be better resisted; in addition, the material has high specific strength and good stability, and well meets the requirements of strength and stability of a reflector component.
In an alternative embodiment, as shown in fig. 3 and 4, an annular supporting plate 22, an annular groove 23 and a plurality of first through holes 24 extending in the radial direction are provided on the side wall of the supporting frame 2, a second through hole 25 extending in the axial direction of the supporting frame 2 is provided on the annular supporting plate 22, and the plurality of first through holes are uniformly distributed along the circumferential direction of the supporting frame 2, are located between the annular groove and the supporting plate, and are communicated with the annular groove. And the first through hole and the second through hole are used for injecting bonding glue. Through the arrangement of the annular groove, when glue is injected through the first through hole, the glue solution flows into the annular groove to form glue spots 91, the integrity of the glue spots is kept, and the bonding strength of the reflector and the support frame is improved.
In an alternative embodiment, as shown in fig. 2, the flexible support fixing assembly includes an adjusting shim 6, three fasteners 14, 3 spherical washers 7 and three translational washers 8, three assembling grooves are provided on the second connecting portion 4b, the connecting line of the three assembling grooves is triangular, the assembling grooves are stepped through grooves, one assembling groove corresponds to one spherical washer 7, one fastener 14 and one translational washer 8, the translational washer 8 is located at the large end of the assembling groove, the spherical washer 7 is sleeved in the translational washer 8, the fastener 14 passes through the spherical washer 7 and the translational washer 8 to realize the fixed connection of the second connecting portion 4b and the lens main body frame, the adjusting shim 6 is a triangular ring structure, and three protrusions are provided at three vertex angles, the protrusions are provided with through holes, the three through holes correspond to the three mounting grooves one by one, the adjusting shim 6, the spherical washer 7 and the translation washer 8 are matched to adjust the relative position of the second connecting part 4b and the lens body frame. But the relative position between flexible support and the camera lens main part frame after flexible support fixed subassembly adaptation displacement and angular adjustment, guarantee that the gasket and locating pin between flexible support and the briquetting remove the back the two and keep suitable relative position, the injecting glue solidification of the two of the later stage of being convenient for realizes the unstressed assembly of reflector assembly.
In one embodiment, the first flexible rotator 16, the second flexible rotator 17 and the base 15 are of an integral structure, and the first flexible rotator 16, the second flexible rotator 17 and the base 15 are formed by processing two groups of curved slots in orthogonal directions on the same cross-shaped substrate, wherein the slot gap is 0.3 mm. The substrate is made of titanium alloy material. The following table 1 shows a simulation comparison result of the influence of different forms of forced displacement on the surface shape error of the reflector on one support under the condition that the reflector support frame assembly supported and fixed by the flexible support provided by the embodiment is compared with the rigid support and fixed.
TABLE 1 profile error due to different forms of forced displacement (λ 632.8nm)
Referring to fig. 1-9, embodiments of the present invention also provide a mirror assembly method, preferably for mirrors having an aperture of no greater than 400mm, comprising the steps of:
in an optional embodiment, the support frame assembly includes a support frame 2, three pressing blocks 3 and six films 5, the support frame 2 is an annular frame, three flanges 21 are uniformly distributed on the periphery of the support frame along the circumferential direction, an annular supporting plate 22 and a first through hole 24 are arranged on the inner side wall of the support frame, the annular supporting plate 22 extends along the radial direction of the support frame and penetrates through the side wall of the support frame, a second through hole 25 is arranged on the annular supporting plate 22, the axial direction of the support frame extends along the second through hole, a third through hole is arranged on the pressing block 3, the axial direction of the support frame 2 extends along the third through hole:
step 1-1: firstly, determining three positions fixed with the support frame on the reflector according to the positions of the three flanges 21;
step 1-2: respectively padding one film 5 on the upper surface and the lower surface of the determined three positions on the reflector, placing the reflector 1 at a preset position above the annular supporting plate 22, and forming an axial glue injection gap between the reflector 1 and the annular supporting plate 22;
step 1-3: and correspondingly assembling the pressing blocks 3 and the flanges 21 one by one, and filling adhesive glue through the first through holes 24, the second through holes 25 and the third through holes 31 respectively to fix the reflector 1 and the support frame assembly. The reflector is mounted on the frame in a stress-free mode, the radial glue plays a role in connecting and fixing the reflector frame, and the axial glue plays a role in limiting the vibration response amplitude of the reflector.
and 3, fixedly connecting the support frame assembly and the lens main body frame through the flexible support for injecting glue, and finishing assembly.
According to the reflector assembling method provided by the embodiment of the invention, the press block and the lens main body frame are connected through the flexible support, the first connecting part and the second connecting part of the flexible support are connected through the first flexible hinge and the second flexible hinge which are orthogonal and perpendicular to the optical axis direction, so that the assembly has strong forced displacement and thermal deformation unloading capacity, the flexible support of the reflector is realized, the flexible hinge has rotary tangential damping by filling damping glue in the flexible hinge, the dynamic response amplitude is effectively reduced, the stress response of the structure in a vibration environment is reduced, and the structural damage caused by vibration is avoided.
In an optional embodiment, the step 3 of fixedly connecting the supporting frame assembly and the lens main body frame through the flexible support for injecting the glue includes:
step 3-1: assembling the first joint and the second joint, and inserting a gap gasket 18 at the assembling position to tightly plug and fix the first joint and the second joint to obtain an assembling component with the pressing block and the flexible support at the initial position;
step 3-2: then, pre-fixing the obtained assembly component on the lens main body frame through an assembly adapter;
step 3-3: after the position and the angle of the reflector are adjusted, fixing a second connecting part of the glue-injected flexible support with the lens main body frame;
step 3-4: removing the gap spacer 18 to form a plurality of first gaps and a plurality of second gaps between the first joint and the second joint, wherein the first gaps and the second gaps are perpendicular;
in an optional embodiment, the pressing block 3 and the flexible support 4 are provided with corresponding positioning holes, the height position of the first joint 13a in the accommodating cavity is determined by positioning pins inserted in the positioning holes in step 3-4, and correspondingly, the step 3-4 further comprises removing the positioning pins;
step 3-5: and filling adhesives into the first gap and the second gap to realize the fixed connection of the support frame assembly and the flexible support for injecting the glue.
Wherein, in an optional embodiment, the flexible support fixing component comprises an adjusting gasket 6, three fasteners 14, 3 spherical washers 7 and three translation washers 8, three assembling grooves are arranged on the second connecting portion 4b, the connecting line of the three assembling grooves is triangular, the assembling grooves are stepped through grooves, one assembling groove corresponds to one spherical washer, one fastener and one translation washer, the translation washer 8 is positioned at the large end of the assembling groove, the spherical washer 7 is sleeved in the translation washer 8, the fasteners 14 are arranged in the spherical washer 7 in a penetrating way to realize the fixed connection of the second connecting portion 4b and the lens main body frame, the adjusting gasket 6 is in a triangular ring structure, three protrusions are arranged at the positions of three vertex angles, through holes are arranged on the protrusions, the three through holes correspond to the three installing grooves one by one, in an optional embodiment, and 3-2, pre-fixing the assembly component at the initial position formed in the step 3-1 on a lens main body frame through a flexible support fixing component, wherein the adjusting gasket is in the initial thickness and angle, the eccentricity of the translation gasket is zero, then connecting the assembly component at the initial position with the lens main body frame through an adapter, removing the flexible support fixing component, after the position and the angle of the reflector are adjusted in the step 3-3, determining the final thickness and the angle of the adjusting gasket and the eccentricity of the translation gasket according to the adjusted position, and realizing the adaptive adjustment of the relative position of the second connecting part and the lens main body frame by trimming the thickness and the inclination of the adjusting gasket and adjusting the eccentricity of the translation gasket. In this embodiment, the assembly adaptor is removed after the adhesive has cured.
The pressing block and the flexible support are provided with the connectors matched with each other, the first vertical gap and the second vertical gap are arranged on the connectors, the bonding glue is injected into the gaps through the filling holes, the pressing block and the flexible support are connected in a stress-free mode, and the influence of assembly stress on the surface shape of the reflector is avoided.
In an optional embodiment, an annular supporting plate, an annular groove, and a plurality of first through holes extending along the radial direction are disposed on the side wall of the supporting frame 2, a second through hole extending along the axial direction of the supporting frame 2 is disposed on the annular supporting plate, the plurality of first through holes are uniformly distributed along the circumferential direction of the supporting frame 2, and are located between the annular groove and the supporting plate and communicated with the annular groove, and the glue injection in step 2 includes:
and injecting bonding glue through the first through hole and the second through hole to form glue spots in the annular groove. The integrity of the glue spots is kept, and the bonding strength of the reflector and the support frame is improved.
The above description is only for the best mode of the present invention, but the scope of the present invention is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention are included in the scope of the present invention.
Those skilled in the art will appreciate that the invention may be practiced without these specific details.
Claims (10)
1. A reflector supporting and fixing method is characterized by comprising the following steps:
fixing a reflector on a support frame assembly, filling damping glue into a flexible support, and curing to obtain a glue-injected flexible support, wherein the flexible support comprises a first connecting part and a second connecting part, the first connecting part is used for being connected with the support frame assembly, the second connecting part is used for being connected with a lens main body frame, the first connecting part and the second connecting part are connected through a first flexible hinge and a second flexible hinge which are orthogonally arranged, the rotating directions of the first flexible hinge and the second flexible hinge are perpendicular to the optical axis direction of the reflector, a plurality of glue injection grooves are formed in the first flexible hinge and the second flexible hinge, and the glue injection grooves are used for filling the damping glue so that the flexible hinge has damping in the rotating tangential direction;
and the support frame assembly and the lens main body frame are fixedly connected through the flexible support for injecting glue.
2. The reflector supporting and fixing method according to claim 1, wherein the supporting frame assembly comprises a supporting frame, three pressing blocks and six thin films, the supporting frame is an annular frame, three flanges are uniformly distributed on the periphery of the supporting frame along the circumferential direction, an annular supporting plate and a first through hole which radially extends along the supporting frame and penetrates through the side wall of the supporting frame are arranged on the inner side wall of the supporting frame, a second through hole which axially extends along the supporting frame is arranged on the annular supporting plate, a third through hole which axially extends along the supporting frame is arranged on the pressing block, and the reflector is fixed on the supporting frame assembly firstly, the method comprises the following steps:
determining three positions on the reflector, which are fixed with the support frame, according to the positions of the three flanges;
respectively padding one film on the upper surface and the lower surface of the determined three positions on the reflector, placing the reflector to a preset position above the annular supporting plate, and forming an axial glue injection gap between the reflector and the annular supporting plate;
and assembling the pressing blocks and the flanges in a one-to-one correspondence manner, and filling adhesive glue through the first through hole, the second through hole and the third through hole respectively to fix the reflector and the support frame assembly.
3. A mirror support fixing method according to claim 2, wherein the film is a polyimide aluminized film having a thickness of 0.02 to 0.06 mm.
4. The mirror support fixing method according to claim 2, wherein an annular groove is further provided on an inner side wall of the holder frame, and the first through hole is located between the annular support plate and the annular groove and is communicated with the annular groove.
5. The mirror support fixing method according to claim 2, wherein a first end of the pressing block is connected to the flange, a second end of the pressing block is provided with a first joint, a first connecting portion of the flexible support is provided with a second joint, and the flexible support through the glue injection is fixedly connected to the holder frame assembly and the lens body frame, and the mirror support fixing method includes:
assembling the first joint and the second joint, and inserting a gap gasket at the assembling position to tightly plug and fix the first joint and the second joint to obtain an assembling component with the pressing block and the flexible support at the initial position;
then pre-fixing the obtained assembly to the lens body frame;
after the position and the angle of the reflector are adjusted, fixing a second connecting part of the glue-injected flexible support with the lens main body frame;
removing the gap gasket, and forming a plurality of first gaps and a plurality of second gaps between the first joint and the second joint, wherein the first gaps and the second gaps are vertical;
and filling adhesives into the first gap and the second gap to realize the fixed connection of the support frame assembly and the flexible support for injecting the glue.
6. The mirror support fixing method according to claim 5, wherein the fixing of the glue-injected flexible mount to the lens body frame includes: the relative position of the second connecting part and the lens main body frame is adjusted adaptively through a flexible support fixing assembly, and the second connecting part and the lens main body frame are fixedly connected.
7. The mirror support fixing method according to claim 6, wherein the flexible mount fixing member comprises an adjustment spacer, three fastening members, three spherical washers, and three translation washers, the second connecting portion is provided with three assembly grooves, the connecting line of the three assembly grooves is triangular, the assembly grooves are stepped through grooves, one assembly groove corresponds to one spherical washer, one fastening member, and one translation washer, the translation washer is located at the large end of the assembly groove, the spherical washer is fitted in the translation washer, the fastening member passes through the spherical washer and the translation washer, so as to fixedly connect the second connecting portion and the lens body frame, the adjustment spacer is of a triangular ring structure, and three protrusions are provided at three vertex angles, the protrusions are provided with through holes, the three through holes correspond to the three mounting grooves one by one, and the relative position of the second connecting part and the lens main body frame is adjusted through trimming the thickness and the inclination angle of the adjusting gasket and adjusting the eccentricity of the translation gasket.
8. The mirror support fixing method according to claim 5, wherein the first joint is provided with a plurality of third grooves and a plurality of fourth grooves in parallel, the third grooves and the fourth grooves being opened in opposite directions, the second joints are arranged in a staggered manner, the second joints are provided with containing cavities with openings at two ends, a plurality of first convex blocks are arranged on the first surface of the containing cavities, a plurality of second lugs are arranged on the second surface of the cavity, the first surface is opposite to the second surface, when the cavity is assembled, the first joints are accommodated in the accommodating cavities, the first lugs are in one-to-one correspondence with the third grooves and are positioned in the corresponding third grooves, the first gap and the second gap are formed with the third groove, the second lug corresponds to the fourth groove one by one, and is positioned in the corresponding fourth groove to form the first gap and the second gap with the fourth groove.
9. The mirror support fixing method according to claim 8, wherein the bottoms of the third and fourth grooves are provided with grooves extending along the length direction of the grooves, and a plurality of glue solution through holes penetrating the bottoms of the grooves are uniformly distributed at the bottoms of the grooves.
10. The mirror support fixing method according to claim 9, wherein a fifth groove extending in a length direction of the first bump is provided on a side of the first bump facing away from the first surface, a sixth groove extending in a length direction of the second bump is provided on a side of the second bump facing away from the second surface, and an adhesive is filled into the first gap and the second gap through the fifth groove and the sixth groove, and the third groove and the fifth groove are opposed to each other.
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| CN201811007765.2A CN108957685B (en) | 2018-08-31 | 2018-08-31 | Method for supporting and fixing reflector |
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| CN201811007765.2A CN108957685B (en) | 2018-08-31 | 2018-08-31 | Method for supporting and fixing reflector |
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| CN110764219A (en) * | 2019-11-08 | 2020-02-07 | 南昌航空大学 | Reflector bonding structure for reducing thermal stress |
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