CN114265177A - Axial supporting pad positioning device and method for large-aperture reflector - Google Patents
Axial supporting pad positioning device and method for large-aperture reflector Download PDFInfo
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- CN114265177A CN114265177A CN202111678725.2A CN202111678725A CN114265177A CN 114265177 A CN114265177 A CN 114265177A CN 202111678725 A CN202111678725 A CN 202111678725A CN 114265177 A CN114265177 A CN 114265177A
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Abstract
The axial supporting pad positioning device for the large-aperture reflector comprises a positioning ring, a positioning block, an axial supporting pad, a fine adjustment assembly, a pre-tightening assembly and a locking assembly, wherein the axial supporting pad is arranged on the positioning ring through the pre-tightening assembly in a first state, the axial supporting pad is positioned to a first target position through adjusting the fine adjustment assembly, the axial supporting pad is abutted against the fine adjustment assembly under the pre-tightening force action of the pre-tightening assembly, the fine adjustment assembly is kept still, and the axial supporting pad and the pre-tightening assembly are detached from the positioning ring; under the second state, install the axial supporting pad on the holding ring once more, under the pretightning force effect of pretension subassembly, the axial supporting pad supports again and leans on the fine setting subassembly, and the axial supporting pad is in first target location once more, accomplishes the location of axial supporting pad. The requirement of two-dimensional direction translation adjustment in the positioning process is met, the device is simple and effective, and quick separation and resetting between the axial supporting pad and the positioning ring in the positioning process can be realized.
Description
Technical Field
The invention relates to the field of photoelectric instrument detection, in particular to a positioning device and a positioning method for an axial supporting pad of a large-aperture reflector.
Background
The aperture of a primary reflector in the optical telescope determines the light collecting capacity of the telescope, and the surface shape precision of the primary reflector influences the light collecting efficiency of the telescope. The support system for the large aperture mirror typically includes two components, an axial support and a lateral support. In order to ensure the surface shape accuracy of the large-caliber reflector, the axial supporting point number of the large-caliber reflector is expanded from 3 points in the prior art to 6 points, 9 points, 18 points, 27 points and the like, and the axial supporting point number is gradually increased to dozens or even hundreds along with the increase of the caliber of the reflector. In order to facilitate the installation and the disassembly between the large-aperture reflector and the axial support structure, an axial support pad is usually bonded to the axial support point on the back of the reflector. The position error of the axial supporting pad during positioning and bonding can directly influence the supporting effect of the axial supporting system, thereby directly influencing the surface shape precision and the pose precision of the reflector. In order to ensure that the axial support pad can be bonded to an ideal axial support point position, an axial support hole is usually precisely machined at each axial support point position on the back surface of the reflector for precise positioning in the bonding and mounting process of the axial support pad and the reflector. For a large-caliber reflector, the processing of dozens or even hundreds of axial supporting holes undoubtedly greatly increases the cost and the period of optical processing, which is particularly problematic for a SiC reflector with high material hardness; for some ultrathin reflectors, the local rigidity of the mirror surface is reduced by processing the support holes on the axial support points, and the printing-through effect is generated during the mirror surface processing, so that the surface shape precision of the mirror surface is influenced.
The method for directly bonding the axial supporting pad on the plane of the back plate of the large-aperture reflector solves various problems caused by the processing of the axial supporting hole. The defects of the existing reflector supporting pad bonding method are mainly reflected as follows: (1) a taper hole for detection is directly machined in the center of the supporting pad, and the existence of the center taper hole is not allowed by the connection mode of some supporting structures and the supporting pad; (2) the positioning of the support pad on the plane of the reflector back plate requires translational adjustment in a two-dimensional direction parallel to the plane of the back plate, which cannot be well met by the existing method; (3) the existing method is to glue the bonding surface of the supporting pad and to finely adjust the position of the supporting pad after the supporting pad is placed on the back surface of the reflector, the fine adjustment needs to be completed before the glue layer is fixed, and the method is not suitable for gluing with a high curing speed.
Disclosure of Invention
In view of the above, in order to solve one of the above-mentioned defects in the prior art, the positioning device and the positioning method for the axial support pad of the large-aperture reflector provided by the present invention satisfy the requirement of translational adjustment in two-dimensional directions during the positioning process, are simple and effective, and can realize quick separation and resetting between the axial support pad and the positioning ring during the positioning process.
In a first aspect, an embodiment of the present invention provides a positioning device for an axial support pad of a large aperture mirror, including:
the positioning ring is used for providing a supporting function during auxiliary positioning;
the positioning block is used for placing a target ball of the laser tracker for auxiliary positioning;
the axial supporting pad is detachably connected with the positioning block;
the fine adjustment assembly is arranged on the positioning ring and used for adjusting the position of the axial support pad;
the pre-tightening assembly is connected with the axial supporting pad and used for providing pre-tightening force for the axial supporting pad to abut against the fine-tuning assembly;
the locking assembly is used for locking the positioning block and the axial supporting pad together;
in a first state, the axial supporting pad is installed on the positioning ring through the pre-tightening assembly, the axial supporting pad is abutted against the fine-tuning assembly under the action of the pre-tightening force of the pre-tightening assembly, the axial supporting pad is positioned to a first target position through adjusting the fine-tuning assembly, the fine-tuning assembly is kept still, and the axial supporting pad and the pre-tightening assembly are detached from the positioning ring;
and in a second state, the axial supporting pad is installed on the positioning ring again through the pre-tightening assembly, under the action of the pre-tightening force of the pre-tightening assembly, the axial supporting pad is abutted against the fine-adjustment assembly again, and the axial supporting pad is located at the first target position to complete the positioning of the axial supporting pad.
As an optional scheme, the circular cushion of axial supporting pad for having first upper surface, the second upper surface of locating piece has the awl nest structure that is used for placing laser tracker target ball, awl nest structure with the axis of locating piece is coaxial, the second lower surface of locating piece with the first upper surface phase-match of axial supporting pad, the equipartition is equipped with first screw hole on the periphery wall of axial supporting pad, the equipartition is equipped with the second screw hole on the periphery wall of locating piece.
As an optional scheme, the pre-tightening assembly comprises a pre-tightening screw, a first flat gasket, a second flat gasket, a spring and a threaded portion, a threaded hole matched with the threaded portion is formed in the axial support pad, the first gasket, the spring and the second flat gasket are sequentially mounted on the pre-tightening screw, and then the pre-tightening screw is connected with the threaded hole in the axial support pad through the threaded portion.
As an alternative, the positioning ring has an arc-shaped structure, the radius of the inner circumference of the arc-shaped structure is larger than the radius of the axial support pad, and the midpoint position of the arc-shaped structure has a first plane adapted to the outer circumferential wall of the axial support pad and a notch feature for accommodating the passage of the pre-tightening screw.
As an optional scheme, 2 second planes are distributed at two positions where the azimuth angle of the outer circumference of the positioning ring is 90 °, each second plane is provided with a through hole for mounting the fine adjustment assembly, the fine adjustment assembly includes a first fine adjustment screw and a second fine adjustment screw, the first fine adjustment screw and the second fine adjustment screw are respectively mounted in the through holes of the 2 second planes, and the first fine adjustment screw and the second fine adjustment screw are aligned with the circle center of the positioning ring.
As an alternative, the first upper surface and the second lower surface are both planar.
As an alternative, the outer circumferential dimension of the positioning block corresponds to the outer circumferential dimension of the axial support pad.
As an alternative, the first screw hole and the second screw hole each have 4.
As an optional scheme, the locking assembly includes a first locking block, a second locking block, a first mounting screw and a second mounting screw, and the coaxial mounting of the axial support pad and the positioning block is completed by the first mounting screw and the second mounting screw through the first locking block and the second locking block which are distributed at 180 degrees.
In a second aspect, an embodiment of the present invention provides a method for positioning an axial support pad of a large aperture mirror, which is applied to the apparatus for positioning an axial support pad of a large aperture mirror, and the method includes:
in a first state, the axial supporting pad is installed on the positioning ring through the pre-tightening assembly, the axial supporting pad is abutted against the fine-tuning assembly under the action of the pre-tightening force of the pre-tightening assembly, the axial supporting pad is positioned to a first target position through adjusting the fine-tuning assembly, the fine-tuning assembly is kept still, and the axial supporting pad and the pre-tightening assembly are detached from the positioning ring;
and in a second state, the axial supporting pad is installed on the positioning ring again through the pre-tightening assembly, under the action of the pre-tightening force of the pre-tightening assembly, the axial supporting pad is abutted against the fine-adjustment assembly again, and the axial supporting pad is located at the first target position to complete the positioning of the axial supporting pad.
The positioning device and method for the axial supporting pad of the large-aperture reflector comprise a positioning ring, a positioning block, an axial supporting pad, a fine adjustment assembly, a pre-tightening assembly and a locking assembly, wherein in a first state, the axial supporting pad is installed on the positioning ring through the pre-tightening assembly, the axial supporting pad is abutted against the fine adjustment assembly under the action of the pre-tightening force of the pre-tightening assembly, the axial supporting pad is positioned to a first target position through adjusting the fine adjustment assembly, and the fine adjustment assembly is kept to be still; the axial supporting pad and the pre-tightening assembly are detached from the positioning ring; under the second state, install the axial supporting pad on the holding ring once more, under the pretightning force effect of pretension subassembly, the axial supporting pad supports again and leans on the fine setting subassembly, and the axial supporting pad is in first target location once more, accomplishes the location of axial supporting pad. The requirement of two-dimensional direction translation adjustment in the positioning process is met, and the quick separation and resetting between the axial supporting pad and the positioning ring in the positioning process can be realized.
Drawings
Fig. 1 is a schematic view of an axial support pad positioning device for a large-aperture reflector according to an embodiment of the present invention;
FIG. 2 is a schematic structural diagram of an alternative view angle of an axial support pad positioning device for a large-aperture reflector according to an embodiment of the present invention;
fig. 3 is a schematic structural diagram of a positioning ring in an axial support pad positioning device for a large-aperture reflector according to an embodiment of the present invention.
Detailed Description
In order to make the technical solutions of the present invention better understood, the technical solutions in the embodiments of the present disclosure will be clearly and completely described below with reference to the drawings in the embodiments of the present disclosure, and it is obvious that the described embodiments are only a part of the embodiments of the present disclosure, but 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.
The terms "first," "second," "third," "fourth," and the like in the description and in the claims, as well as in the drawings, are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It will be appreciated that the data so used may be interchanged under appropriate circumstances such that the embodiments described herein may be practiced otherwise than as specifically illustrated or described herein. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed, but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.
Referring to fig. 1, an embodiment of the present invention provides a positioning device for an axial support pad of a large aperture mirror, including:
the positioning ring 4 is used for being mounted on a target object to provide a supporting effect during auxiliary positioning, the positioning ring 4 is mounted on the target object during positioning, the target object can be a reflector, and the positioning device is required to be used during positioning, so that the positioning device can be removed after positioning detection is finished, and the positioning ring 4 can be bonded to the back of the reflector through 502 quick-drying glue in the embodiment by adopting a temporary connection mode such as bonding, magnetic attraction and the like;
the positioning block 7 is used for auxiliary positioning, and a target ball of the laser tracker can be placed on the positioning block 7;
the axial supporting pad 8 is detachably connected with the positioning block 7, and the axial supporting pad 8 can be installed together with the positioning block 7;
a fine adjustment assembly 5, which can be mounted on the positioning ring 4, for adjusting the position of the axial support pad 8;
the pre-tightening assembly is connected with the axial supporting pad 8 in a threaded connection mode and used for providing pre-tightening force for the axial supporting pad 8 to abut against the fine adjustment assembly 5, the pre-tightening force can be elastic force or pulling force, and the pre-tightening assembly is selected according to the structure of the pre-tightening assembly and is not limited;
the locking assembly 6 is used for locking the positioning block 7 and the axial supporting pad 8 together, the positioning block 7 and the axial supporting pad 8 can be fixed in a screw connection mode, and unlocking can be realized when the positioning block 7 and the axial supporting pad 8 are required to be separated;
in a first state, an axial supporting pad 8 is mounted on the positioning ring 4 through the pre-tightening assembly, the axial supporting pad 8 abuts against the fine adjustment assembly 5 under the action of the pre-tightening force of the pre-tightening assembly, the fine adjustment assembly is adjusted to position the axial supporting pad to a first target position, the fine adjustment assembly 5 is kept still, the axial supporting pad 8 and the pre-tightening assembly are detached from the positioning ring 4, and the first positioning of the axial supporting pad 8 is completed;
in the second state, the axial support pad 8 is installed on the positioning ring 4 again through the pre-tightening component, under the action of the pre-tightening force of the pre-tightening component, the axial support pad 8 abuts against the fine adjustment component 5 again, the axial support pad 8 is located at the first target position, the positioning of the axial support pad 8 is completed, the second positioning of the axial support pad 8 is completed, and the axial support pad 8 can be understood as the resetting of the axial support pad 8 because of the installation again.
In this embodiment, the adhesive is configured on the surface of the axial support pad 8 departing from the positioning block, the adhesive is used for fixing the axial support pad on the reflector, and the adhesive can be 502 quick-drying adhesive and is not limited to the surface.
It should be noted that, after the axial supporting pad 8 is reset and fixed to be installed, the locking assembly 6, the positioning block 7, the pre-tightening screw 1, the first flat gasket 21, the second flat gasket 22 and the spring 3 can be detached from the axial supporting pad 8, the auxiliary tool is adopted to test the bonding strength of each axial supporting pad 8, the positioning ring is detached after the requirement is met, the back of the reflector is cleaned, and the positioning operation of the axial supporting pad 8 is completed.
The axial supporting pad positioning device for the large-aperture reflector comprises a positioning ring 4, a positioning block 7, an axial supporting pad 8, a fine adjustment assembly 5, a pre-tightening assembly and a locking assembly 6, wherein in a first state, the axial supporting pad 8 is installed on the positioning ring 4 through the pre-tightening assembly, the axial supporting pad 8 is abutted against the fine adjustment assembly 5 under the action of the pre-tightening force of the pre-tightening assembly, the axial supporting pad is positioned to a first target position through adjusting the fine adjustment assembly, the fine adjustment assembly 5 is kept still, the axial supporting pad 8 and the pre-tightening assembly are detached from the positioning ring 4, and the first positioning of the axial supporting pad 8 is completed; in a second state, the axial supporting pad 8 is installed on the positioning ring 4 again through the pre-tightening assembly, under the action of the pre-tightening force of the pre-tightening assembly, the axial supporting pad 8 abuts against the fine adjustment assembly 5 again, the axial supporting pad 8 is located at the first target position, and the positioning of the axial supporting pad 8 is completed. The requirement of two-dimensional direction translation adjustment in the positioning process is met, the device is simple and effective, and the rapid separation and resetting between the axial supporting pad 8 and the positioning ring 4 in the positioning process can be realized.
The embodiment of the invention also provides a positioning device for the axial supporting pad of the large-aperture reflector, which comprises:
referring to fig. 1 and 2, in this embodiment, the axial support pad 8 is a circular pad having a first upper surface, the first upper surface has a reference plane feature perpendicular to the outer circumference of the axial support pad 8, the second upper surface of the positioning block 7 has a conical socket structure for placing a target ball of the laser tracker, the conical socket structure is coaxial with the axis of the positioning block 7, the second lower surface of the positioning block 7 is matched with the first upper surface of the axial support pad 8, optionally, the first upper surface and the second lower surface are both flat, and the outer circumference of the positioning block 7 has a size consistent with the outer circumference of the axial support pad 8.
For convenient connection of locating piece 7 and axial supporting pad 8, the equipartition is equipped with first screw hole on the periphery wall of axial supporting pad 8, the equipartition is equipped with the second screw hole on the periphery wall of locating piece 7, and in this embodiment, first screw hole and second screw hole all set up 4.
The pre-tightening assembly comprises a pre-tightening screw rod 1, a first flat gasket 21, a second flat gasket 22, a spring and a threaded portion, a threaded hole matched with the threaded portion is formed in the axial supporting pad 8, the first flat gasket 21, the spring and the second flat gasket 22 are sequentially installed on the pre-tightening screw rod 1, and then the pre-tightening assembly is connected with the threaded hole in the axial supporting pad 8 through the threaded portion.
As shown in fig. 2 and 3, the positioning ring 4 may alternatively have an arc-shaped structure, the radius of the inner circumference of the arc-shaped structure is larger than that of the axial supporting pad 8, and the midpoint position of the arc-shaped structure has a first plane adapted to the outer circumferential wall of the axial supporting pad 8 and a notch feature for accommodating the passage of the pre-tightening screw 1. Two positions of the positioning ring 4 with an azimuth angle of 90 degrees on the outer circumference are distributed with 2 second planes, each second plane is provided with a through hole for mounting the fine adjustment component 5, the fine adjustment component 5 comprises a first fine adjustment screw, a first nut and a second fine adjustment screw which are matched with the first fine adjustment screw, and a second nut which is matched with the second fine adjustment screw, the first fine adjustment screw and the second fine adjustment screw are respectively mounted in the through holes of the 2 second planes, the first fine adjustment screw and the second fine adjustment screw are aligned with the circle center of the positioning ring 4, it needs to be noted that the shapes of the first plane and the second plane can be flexibly selected according to needs, and the position is not limited.
In this embodiment, first screw hole with each equipartition of second screw hole has 4, and 4 first screw hole equipartitions are on the periphery wall of axial supporting pad 8 promptly, and 4 second screw hole equipartitions are on the periphery wall of locating piece 7. The outer circumference size of locating piece 7 with the outer circumference size of axial supporting pad 8 is unanimous, locking Assembly 6 includes first latch segment, second latch segment, first mounting screw and second mounting screw, adopts first mounting screw with the second mounting screw is accomplished through 180 first latch segments and the second latch segment that distribute axial supporting pad 8 with the coaxial arrangement of locating piece 7.
The embodiment of the invention also provides a third axial supporting pad positioning device for the large-aperture reflector, which comprises a pre-tightening screw 1, a first flat gasket 21, a second flat gasket 22, a spring 3, a positioning ring 4, a fine adjustment assembly 5, a locking assembly 66, a positioning block 7 and an axial supporting pad 8. The inner circumferential surface of the locking assembly 6 is the same as the outer diameters of the axial supporting pad 8 and the positioning block 7, and the locking assembly 6 is adopted to complete the coaxial installation of the axial supporting pad 8 and the positioning block 7. After the first flat gasket 21, the spring 3 and the second flat gasket 22 are sequentially installed on the pre-tightening screw 1, the pre-tightening screw 1 is connected with the threaded hole in the peripheral wall of the axial supporting pad 8, so that the assembly of the axial supporting pad 8 and the pre-tightening screw 1 is completed, and the spring 3 is in a free length state at the moment.
Referring to fig. 2, each fine adjustment assembly comprises a nut 51 and a fine-toothed screw rod 52, the nuts 51 of the two sets of fine adjustment assemblies 5 are respectively adhered and mounted on the positioning ring 4 by using quick-drying glue, the two sets of fine adjustment assemblies 5 are distributed at an azimuth angle of 90 degrees, and a ball head at the top end of the fine-toothed screw rod 52 points to the center of the positioning ring 4. The fine-pitch screw 52 on the fine adjustment assembly 5 is adjusted to the theoretical design position according to the amount of clearance Δ R between the inner diameter of the positioning ring 4 and the outer diameter of the axial support pad 8.
Referring to fig. 3, the positioning ring 4 is arc-shaped, and the radius of the inner circumference is larger than the radius of the axial supporting pad 8 by Δ R. The arc length midpoint position is provided with a first plane 41 and a notch feature 42, and the notch depth of the notch feature 42 meets the requirement of the bonding height of the axial support pad. Two positions of the positioning ring 4 with an azimuth angle of 90 ° on the outer circumference are distributed with 2 second planes 43, each of which has a through hole 44 for mounting the fine adjustment assembly 5, the height of the through hole 44 being within the thickness of the axial support pad 8.
Referring to fig. 2 and 3, when the device of the present invention is used to adjust the position of the axial support pad 8, the positioning ring 4 is adhered to the back of the reflector by the quick-drying adhesive 502, the opening feature 42 is noted to be upward, after the adhesive of the ring 4 to be positioned is dried and solidified, the second flat gasket 22 is squeezed to compress the spring 3, the assembled axial support pad 8 and the pre-tightening screw 1 are installed on the positioning ring 4 through the opening feature 42 at the midpoint position of the positioning ring 4, the outer circumference of the axial support pad 8 is in tangential contact with the ball heads of the two sets of fine adjustment assemblies 5, and the pre-tightening force brought by the compression spring 3 makes the axial support pad 8 and the ball heads of the two sets of fine adjustment assemblies 5 in tangential contact all the time, so that the fine adjustment assemblies 5 can adjust the position of the axial support pad 8.
After the position of the axial supporting pad 8 is adjusted, the second flat gasket 22 is extruded to further compress the spring 3, the axial supporting pad 8, the pre-tightening screw 1, the first flat gasket 21, the spring 3 and the second flat gasket 22 are taken out together through the notch feature 42 of the positioning ring 4, after secondary cleaning and gluing before gluing are carried out, the second flat gasket 22 is extruded again so that the axial supporting pad 8 is reset onto the positioning ring 4 by the compression spring 3, and the positioning block 7 is pressed to extrude redundant glue and clean. Because the position is fixed unchangeable after the holding ring 4 bonds, the bulb rigidity of two sets of fine setting subassemblies 5 is unchangeable, resets axial supporting pad 8 to holding ring 4 on, and the bulb has guaranteed the accurate of axial supporting pad 8 centre of a circle position promptly and has reset after the contact mutually with the excircle circumference of axial supporting pad 8.
In the embodiment of the invention, a taper hole for detection does not need to be processed at the center of the axial supporting pad, and the requirement that the central taper hole is not allowed to exist in the connection mode of some supporting structures and supporting pads is met. Two sets of fine adjustment screws arranged on the 90-degree circumferential direction of the positioning ring meet the requirement of the axial supporting pad on translation adjustment along the two-dimensional direction in the plane of the reflector backboard, and the method is simple and effective. Based on the principle that the relative positions of the two ball heads are unchanged, and the positions of the circle centers of the axial supporting pad and the ball heads are fixed after the outer circumference of the axial supporting pad is in contact with each other, the outer circumference of the axial supporting pad is ensured to be in complete contact with the two ball heads on the two sets of fine adjustment screws by adopting the method of the pre-tightening force of the compression spring, and the quick separation and reset between the axial supporting pad and the positioning ring in the bonding process can be realized.
In a second aspect, an embodiment of the present invention provides a method for positioning an axial support pad of a large aperture mirror, which is applied to the apparatus for positioning an axial support pad of a large aperture mirror, and the method includes:
in a first state, an axial supporting pad 8 is mounted on the positioning ring 4 through the pre-tightening assembly, the axial supporting pad 8 abuts against the fine adjustment assembly 5 under the action of the pre-tightening force of the pre-tightening assembly, the fine adjustment assembly is adjusted to position the axial supporting pad to a first target position, the fine adjustment assembly 5 is kept still, the axial supporting pad 8 and the pre-tightening assembly are detached from the positioning ring 4, and the first positioning of the axial supporting pad 8 is completed;
in the second state, the axial support pad 8 is installed on the positioning ring 4 again through the pre-tightening component, under the action of the pre-tightening force of the pre-tightening component, the axial support pad 8 abuts against the fine adjustment component 5 again, the axial support pad 8 is located at the first target position, the positioning of the axial support pad 8 is completed, the second positioning of the axial support pad 8 is completed, and the axial support pad 8 can be understood as the resetting of the axial support pad 8 because of the installation again.
Specifically, the embodiment of the invention also provides a method for positioning the axial supporting pad of the large-aperture reflector, which comprises the following steps
S101, after the positions of all the axial supporting pads are accurately adjusted before gluing, the axial supporting pads 8 are taken out from the notch features 42 of the positioning ring 4 by a method of pressing the springs 3.
S102, after the adhesive surface of the axial supporting pad 8 is coated with the glue, the adhesive surface is quickly reset to the positioning ring 4 by the method of the compression spring 3, and the adhesive layer is not required to be cut and laterally torn due to the fact that the axial supporting pad 8 is adjusted again. The notch feature 42 on the retaining ring 4 allows the locating block 7 to be pressed to squeeze out excess glue and clean.
S103, after all the glue layers are completely cured, detaching the locking assembly 6, the positioning block 7, the pre-tightening screw 1, the first flat gasket 21, the second flat gasket 22 and the spring 3 from the axial supporting pads 8, testing the bonding strength of each axial supporting pad 8 by adopting an auxiliary tool, detaching the positioning rings after meeting the requirements, and cleaning the back of the reflector.
The positioning method for the axial supporting pad of the large-aperture reflector provided by the invention meets the requirement of translational adjustment in two-dimensional direction in the positioning process, is simple and effective, and can realize quick separation and resetting between the axial supporting pad and the positioning ring in the positioning process.
It should be understood that various forms of the flows shown above may be used, with steps reordered, added, or deleted. For example, the steps described in the present disclosure may be executed in parallel, sequentially, or in different orders, as long as the desired results of the technical solutions disclosed in the present disclosure can be achieved, and the present disclosure is not limited herein.
The above detailed description should not be construed as limiting the scope of the disclosure. It should be understood by those skilled in the art that various modifications, combinations, sub-combinations and substitutions may be made in accordance with design requirements and other factors. Any modification, equivalent replacement, and improvement made within the spirit and principle of the present disclosure should be included in the scope of protection of the present disclosure.
Claims (10)
1. The utility model provides a heavy-calibre speculum axial supporting pad positioner which characterized in that includes:
the positioning ring is used for providing a supporting function during auxiliary positioning;
the positioning block is used for placing a target ball of the laser tracker for auxiliary positioning;
the axial supporting pad is detachably connected with the positioning block;
the fine adjustment assembly is arranged on the positioning ring and used for adjusting the position of the axial support pad;
the pre-tightening assembly is connected with the axial supporting pad and used for providing pre-tightening force for the axial supporting pad to abut against the fine-tuning assembly;
the locking assembly is used for locking the positioning block and the axial supporting pad together;
in a first state, the axial supporting pad is installed on the positioning ring through the pre-tightening assembly, the axial supporting pad is abutted against the fine-tuning assembly under the action of the pre-tightening force of the pre-tightening assembly, the axial supporting pad is positioned to a first target position through adjusting the fine-tuning assembly, the fine-tuning assembly is kept still, and the axial supporting pad and the pre-tightening assembly are detached from the positioning ring;
and in a second state, the axial supporting pad is installed on the positioning ring again through the pre-tightening assembly, under the action of the pre-tightening force of the pre-tightening assembly, the axial supporting pad is abutted against the fine-adjustment assembly again, and the axial supporting pad is located at the first target position to complete the positioning of the axial supporting pad.
2. The positioning device for the axial support pad of the large-aperture reflector as claimed in claim 1, wherein the axial support pad is a circular pad having a first upper surface, the second upper surface of the positioning block has a conical socket structure for placing the target ball, the conical socket structure is coaxial with the positioning block, the second lower surface of the positioning block is matched with the first upper surface of the axial support pad, first screw holes are uniformly distributed on the peripheral wall of the axial support pad, and second screw holes are uniformly distributed on the peripheral wall of the positioning block.
3. The positioning device for the axial support pad of the large-caliber reflecting mirror according to claim 2, wherein the pre-tightening assembly comprises a pre-tightening screw, a first flat gasket, a second flat gasket, a spring and a threaded portion, the axial support pad is provided with a threaded hole matched with the threaded portion, the pre-tightening screw is sequentially provided with the first gasket, the spring and the second flat gasket, and then is connected with the threaded hole on the axial support pad through the threaded portion.
4. The apparatus as claimed in claim 3, wherein the positioning ring has an arc-shaped structure, the radius of the inner circumference of the arc-shaped structure is larger than the radius of the axial support pad, and the midpoint of the arc-shaped structure has a first plane adapted to the outer circumferential wall of the axial support pad and a notch feature for receiving the pre-tightening screw therethrough.
5. The positioning device for an axial support pad of a large-caliber reflecting mirror as claimed in claim 4, wherein the positioning ring has 2 second planes distributed at two positions with an azimuth angle of 90 ° on the outer circumference, each second plane is provided with a through hole for installing the fine tuning assembly, the fine tuning assembly comprises a first fine tuning screw and a second fine tuning screw, the first fine tuning screw and the second fine tuning screw are respectively installed in the through holes of the 2 second planes, and the first fine tuning screw and the second fine tuning screw are aligned with the center of the positioning ring.
6. The apparatus of claim 2, wherein the first upper surface and the second lower surface are both planar.
7. The positioning apparatus for an axial support pad of a large aperture reflector as claimed in claim 2, wherein the outer circumference of the positioning block is substantially the same size as the outer circumference of the axial support pad.
8. The positioning device for an axial support pad of a large aperture reflector as claimed in claim 7, wherein there are 4 each of the first and second screw holes.
9. The apparatus as claimed in claim 8, wherein the locking assembly comprises a first locking block, a second locking block, a first mounting screw and a second mounting screw, and the first and second mounting screws are used to achieve the coaxial mounting of the axial support pad and the positioning block through the first and second locking blocks distributed by 180 °.
10. A method for positioning an axial support pad of a large-caliber reflecting mirror, which is applied to the positioning device for an axial support pad of a large-caliber reflecting mirror according to any one of claims 1 to 9, the method comprising:
in a first state, the axial supporting pad is installed on the positioning ring through the pre-tightening assembly, the axial supporting pad is abutted against the fine-tuning assembly under the action of the pre-tightening force of the pre-tightening assembly, the axial supporting pad is positioned to a first target position through adjusting the fine-tuning assembly, the fine-tuning assembly is kept still, and the axial supporting pad and the pre-tightening assembly are detached from the positioning ring;
and in a second state, the axial supporting pad is installed on the positioning ring again through the pre-tightening assembly, under the action of the pre-tightening force of the pre-tightening assembly, the axial supporting pad is abutted against the fine-adjustment assembly again, and the axial supporting pad is located at the first target position to complete the positioning of the axial supporting pad.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111678725.2A CN114265177A (en) | 2021-12-31 | 2021-12-31 | Axial supporting pad positioning device and method for large-aperture reflector |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5877905A (en) * | 1997-04-14 | 1999-03-02 | Schwartz; Richard A. | Mount for telescope mirrors |
| CN104267481A (en) * | 2014-10-23 | 2015-01-07 | 中国工程物理研究院总体工程研究所 | Back supporting device for large-caliber reflector |
| CN106526784A (en) * | 2016-11-30 | 2017-03-22 | 中国科学院长春光学精密机械与物理研究所 | Flexible supporting mechanism for plane mirror |
| CN106772919A (en) * | 2016-12-28 | 2017-05-31 | 中国科学院长春光学精密机械与物理研究所 | The adhesive method of large caliber reflecting mirror supporting pad |
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2021
- 2021-12-31 CN CN202111678725.2A patent/CN114265177A/en not_active Withdrawn
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|---|---|---|---|---|
| US5877905A (en) * | 1997-04-14 | 1999-03-02 | Schwartz; Richard A. | Mount for telescope mirrors |
| CN104267481A (en) * | 2014-10-23 | 2015-01-07 | 中国工程物理研究院总体工程研究所 | Back supporting device for large-caliber reflector |
| CN106526784A (en) * | 2016-11-30 | 2017-03-22 | 中国科学院长春光学精密机械与物理研究所 | Flexible supporting mechanism for plane mirror |
| CN106772919A (en) * | 2016-12-28 | 2017-05-31 | 中国科学院长春光学精密机械与物理研究所 | The adhesive method of large caliber reflecting mirror supporting pad |
Non-Patent Citations (2)
| Title |
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| 吴小霞等: "大口径球面镜支撑系统的优化设计", 《光子学报》 * |
| 胡海飞: "大型镜面原位光学加工-检测多点复合支撑系统研究", 《中国优秀博硕士学位论文全文数据库（博士）》 * |
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