Primary and secondary mirror bracket processing device and primary and secondary mirror bracket processing method

Abstract

The invention discloses a primary and secondary mirror support machining device and a primary and secondary mirror support machining method, and the primary and secondary mirror support machining device comprises a bottom plate, a supporting cylinder, a plurality of arc-shaped fixing seats, a sensor mounting seat and a display device. On one hand, the outer side surface of the arc-shaped elastic sheet is fixedly connected with the metal induction block, and the metal induction block fills a pit formed by the outer side surface of the arc-shaped elastic sheet and the radial through hole, so that when the inner side surface of the arc-shaped elastic sheet is machined by a cutter, a second bolt on the sensor mounting seat can apply an abutting force to the metal induction block; the arc-shaped elastic piece can be prevented from being elastically bent and deformed in the radial direction under the acting force of a cutter, and therefore the inner side face of the arc-shaped elastic piece can be precisely subjected to finish machining. And on the other hand, in the finish machining process of the arc-shaped elastic piece, an operator can adjust machining parameters in real time according to the machining deformation amount of the arc-shaped elastic piece, and therefore the machining deformation of the arc-shaped elastic piece is within a proper range.

Description

Technical Field

[0001] This application relates to the field of machining fixture technology, and in particular to a primary and secondary mirror support machining device and a primary and secondary mirror support machining method. Background Technology

[0002] Complex optomechanical systems often include common-aperture components, which are shared by various imaging channels such as television and thermal imaging. Their optical performance directly determines the image quality of the product. The core structural component of the common-aperture component is the primary and secondary mirror support, which places extremely high demands on the shape and positional accuracy of the primary and secondary mirror mounting surfaces and the overall structural stability. The primary and secondary mirror support parts are made of alloy steel, and their structure is complex, featuring thin-walled, low-rigidity arc-shaped springs. The difficulty in machining these arc-shaped springs lies in their large deformation and the difficulty in ensuring accuracy, especially since the position of the arc-shaped springs cannot be machined using conventional machining methods.

[0003] refer to Figure 1 and Figure 2 The primary and secondary mirror support 1 includes a cylindrical body 101, a secondary mirror fixing ring 102 disposed at the center of the first end of the cylindrical body, and a plurality of arc-shaped spring pieces 103 evenly distributed on the inner wall of the second end of the cylindrical body. The cylindrical body has radial through holes 104 with the same shape as the arc-shaped spring pieces. One end of each arc-shaped spring piece is integrally formed with a portion of the edge of the radial through hole, while the other end is a free end. The arc-shaped spring pieces can undergo elastic bending deformation when subjected to radial force. The secondary mirror fixing ring at the first end of the cylindrical body is used to install the secondary mirror, and the plurality of arc-shaped spring pieces at the second end of the cylindrical body are used to install the primary mirror. The coaxiality of the circles corresponding to the secondary mirror fixing ring and the plurality of arc-shaped spring pieces is ≤0.02mm, and the mounting hole dimensional accuracy is H7. Currently, this part is manufactured using electrical discharge machining (EDM) to process the arc-shaped spring pieces, but the resulting dimensions and geometric tolerances cannot meet the design requirements, significantly impacting the performance of the optical system. Summary of the Invention

[0004] This application provides a primary and secondary mirror support processing device and method, which can solve the technical problems of difficult processing, insufficient precision, and out-of-tolerance dimensions and positions of primary and secondary mirror supports in the prior art. The technical solution is as follows:

[0005] Firstly, a primary and secondary mirror support processing apparatus is provided, comprising:

[0006] A base plate has a circular boss on one side surface. The outer diameter of the circular boss is smaller than the inner diameter of the secondary mirror fixing ring. The circular boss and the base plate are used to position the first end of the cylindrical body. A support cylinder has a first end and a second end along the axial direction. The first end of the support cylinder is vertically fixed to the base plate, and the central axis of the support cylinder coincides with the central axis of the circular boss. The inner diameter of the support cylinder is larger than the outer diameter of the cylindrical body, and the interior is used to accommodate the cylindrical body. A plurality of arc-shaped fixing seats are evenly distributed at the second end of the cylindrical body. Each arc-shaped fixing seat is fixedly connected to the second end of the support cylinder, and its side facing the central axis of the support cylinder has an arc surface equal to the inner diameter of the support cylinder. The arc-shaped fixing seat is provided with at least two first threaded holes extending radially along the support cylinder. Two first threaded holes are located in the same plane parallel to the base plate, and a first bolt is threaded into each first threaded hole. The first bolt is used to abut against the cylindrical body. A sensor mounting base is fixedly connected to the side of the arc-shaped fixing base away from the second end of the support cylinder. The sensor mounting base has a first mounting hole extending radially along the support cylinder. An eddy current sensor with a detection probe facing the central axis of the cylindrical body is installed in the first mounting hole. A metal sensing block is fixedly connected to the side of the arc-shaped spring sheet away from the central axis of the cylinder. The eddy current sensor is used to sense the displacement L between the metal sensing block and the detection probe of the eddy current sensor. A display device is also included. The display device is electrically connected to the eddy current sensor and is used to display the value of the displacement L monitored by the eddy current sensor in real time.

[0007] Optionally, the sensor mounting base is provided with a plurality of second threaded holes extending radially along the support cylinder, and a second bolt is provided in each second threaded hole. The second bolt is used to abut against the outer side of the metal sensing block radially.

[0008] Optionally, the radius of curvature of the side of the metal sensing block facing the arc-shaped spring is equal to the radius of curvature of the side of the arc-shaped spring facing the metal sensing block.

[0009] Optionally, an adhesive layer may also be provided between the arc-shaped spring and the metal sensing block.

[0010] Optionally, the metal sensing block is provided with an adhesive groove on the side facing the arc-shaped spring, and an adhesive injection hole is provided on the metal sensing block extending radially along the support cylinder. The adhesive injection hole penetrates the metal sensing block and is used to inject adhesive into the adhesive groove.

[0011] Optionally, the eddy current sensor is cylindrical, and the sensor mounting base is provided with a third threaded hole that is perpendicular to the central axis of the first mounting hole and communicates with the first mounting hole. A third bolt is threaded into the third threaded hole, and the third bolt is used to fix the eddy current sensor.

[0012] Optionally, an adhesive block is provided between the free end of the arc-shaped spring and the edge of the radial through hole.

[0013] Optionally, the adhesive layer is formed by curing liquid structural adhesive, and the adhesive blocks are all formed by curing liquid structural adhesive.

[0014] The beneficial effects of the technical solutions provided in this application include at least the following:

[0015] A primary and secondary mirror support processing device includes: a base plate, a support cylinder, multiple arc-shaped fixing seats, a sensor mounting seat, and a display device. Since the primary and secondary mirror supports are placed inside the support cylinder and positioned by the secondary mirror fixing ring at the first end of the primary and secondary mirror supports and the surface of the base plate, once the primary and secondary mirror supports are positioned, the primary and secondary mirror supports can be fixed inside the support cylinder by tightening the first bolt on the arc-shaped fixing seat. Then, the primary and secondary mirror support processing device is installed on a processing equipment for precision machining. On one hand, since a metal sensing block is fixedly connected to the outer surface of the arc-shaped spring, and the metal sensing block fills the recess formed by the outer surface of the arc-shaped spring and the radial through hole, when the tool processes the inner surface of the arc-shaped spring, the second bolt on the sensor mounting seat can apply a resisting force to the metal sensing block, which can prevent the arc-shaped spring from undergoing radial elastic bending deformation under the force of the tool. Therefore, the inner surface of the arc-shaped spring can be precisely precision machined. On the other hand, since the eddy current sensor is fixedly mounted on the sensor mounting base and the metal sensing block is fixedly connected to the outer side of the arc-shaped spring, the displacement change sensed by the eddy current sensor is the radial deformation of the arc-shaped spring. This deformation is displayed in real time through the display device. During the finishing process of the arc-shaped spring, the operator can adjust the spindle speed, cutting amount and feed rate of the machining equipment in real time according to the machining deformation amount, so that the machining deformation amount of the arc-shaped spring is within a suitable range, thereby machining the inner side of the arc-shaped spring.

[0016] Secondly, a method for processing primary and secondary mirror supports is provided, applied to the aforementioned primary and secondary mirror support processing apparatus, the method comprising the following steps:

[0017] Step 1: Fix the support cylinder to the base plate so that the central axis of the circular boss is collinear with the central axis of the support cylinder;

[0018] Step 2: Fix the metal sensing block to the side of the arc-shaped spring sheet that is away from the central axis of the cylinder;

[0019] Step 3: Place the cylindrical body with the metal sensing block inside the support cylinder, and make the secondary mirror fixing ring concentrically fitted on the circular protrusion of the base plate. Adjust the distance between the eddy current sensor detection probe and the outer wall of the cylindrical body to 1mm, and fix the eddy current sensor.

[0020] Step 4: Adjust the first bolt on each arc-shaped fixing seat so that the displacement L collected by the eddy current sensor on each arc-shaped fixing seat satisfies: L < 8 μm;

[0021] Step 5: Adjust the second bolt on each sensor mounting base so that the displacement L collected by the eddy current sensor on each sensor mounting base satisfies: L≤12μm;

[0022] Step 6: Place an adhesive block between the free end of the arc-shaped spring piece and the edge of the radial through hole, and wait for it to cure;

[0023] Step 7: Securely connect the base with the cylindrical component to the processing equipment, and perform precision machining on the side of the arc-shaped spring sheet facing the center;

[0024] Step 8: Based on the real-time displacement change of the displacement L monitored by the eddy current sensor displayed on the display device. The processing parameters are adjusted in real time to control the amount of processing deformation.

[0025] Furthermore, in step eight, the displacement change displayed in real time by the display device during the processing stage... When the displacement is >10μm, the displacement change can be reduced by adjusting the processing parameters. Keep it within 10μm.

[0026] Furthermore, step two, which involves fixing the metal sensing block to the side of the arc-shaped spring sheet opposite to the central axis of the cylinder, includes the following sub-steps:

[0027] Step 2.1: Attach one side of each of the four double-sided tapes to the four corners of the outer side of the curved spring, and then attach the metal sensor block to the other side of the four double-sided tapes;

[0028] Step 2.2: Inject liquid structural adhesive into the metal induction block and the arc-shaped spring through the injection hole, and wait for the liquid structural adhesive to cure to form an adhesive layer.

[0029] The beneficial effects of the technical solutions provided in this application are the same as those of the primary and secondary mirror support processing device described above, and will not be repeated here.

[0030] Other features and advantages of this disclosure will be described in detail in the following detailed description section. Attached Figure Description

[0031] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0032] Figure 1 This is a three-dimensional schematic diagram of the primary and secondary mirror support from one perspective;

[0033] Figure 2 This is a three-dimensional schematic diagram of the primary and secondary mirror support from another perspective and with partial cross-section.

[0034] Figure 3 This is an exploded view of the primary and secondary mirror support processing apparatus provided in the embodiments of this application;

[0035] Figure 4 This is a front view of the primary and secondary mirror support processing device provided in this application embodiment after the primary and secondary mirror supports are clamped.

[0036] Figure 5 yes Figure 4 Cross-sectional view of the primary and secondary mirror support fabrication device at section AA;

[0037] Figure 6 yes Figure 5 A magnified view of a section at point B in the middle;

[0038] Figure 7 This is a perspective view of the arc-shaped fixing seat in the primary and secondary mirror support processing device provided in the embodiments of this application;

[0039] Figure 8 This is a three-dimensional schematic diagram of the metal sensing block in the primary and secondary mirror support processing device provided in the embodiments of this application.

[0040] Explanation of reference numerals in the attached figures

[0041] 1-Primary and secondary mirror brackets; 101-Cylindrical body; 102-Secondary mirror fixing ring; 103-Arc-shaped spring; 2-Base plate; 201-Circular boss; 3-Support cylinder; 4-Arc-shaped fixing seat; 401-Arc surface; 402-First threaded hole; 5-First bolt; 6-Sensor mounting seat; 601-First mounting hole; 602-Second threaded hole; 603-Third threaded hole; 7-Eddy current sensor; 8-Metal sensing block; 801-Glue tank; 802-Glue injection hole; 9-Display device; 10-Second bolt; 11-Adhesive layer; 12-Adhesive block. Detailed Implementation

[0042] The specific embodiments of this disclosure will be described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are for illustration and explanation only and are not intended to limit this disclosure.

[0043] In this disclosure, unless otherwise stated, directional terms such as "upper" and "lower" generally refer to the relative positions of the corresponding components in the direction of gravity when they are in use, and "inner" and "outer" refer to their relative positions to the contours of the corresponding components themselves. Furthermore, the terms "first," "second," etc., used in this disclosure are for distinguishing one element from another and do not have sequential or importance implications. In the following description, when referring to the accompanying drawings, unless otherwise explained, the same reference numerals in different drawings denote the same or similar elements.

[0044] refer to Figure 1 and Figure 2 The primary and secondary mirror support 1 includes a cylindrical body 101, a secondary mirror fixing ring 102 disposed at the center of the first end of the cylindrical body 101, and a plurality of arc-shaped spring pieces 103 evenly distributed on the inner wall of the second end of the cylindrical body 101. The cylindrical body 101 has radially penetrating holes with the same shape as the arc-shaped spring pieces 103. One end of each arc-shaped spring piece 103 is integrally formed with a portion of the edge of the radially penetrating hole, and the other end is a free end. The arc-shaped spring piece 103 can undergo elastic bending deformation when subjected to radial force. The secondary mirror fixing ring 102 at the first end of the cylindrical body 101 is used to install the secondary mirror, and the plurality of arc-shaped spring pieces 103 at the second end of the cylindrical body 101 are used to install the primary mirror. The coaxiality of the circles corresponding to the secondary mirror fixing ring 102 and the plurality of arc-shaped spring pieces 103 is ≤0.02mm, and the mounting hole dimensional accuracy is H7. Currently, during the production process of this part, the arc-shaped spring 103 is machined using electrical discharge machining, but the dimensions and shape do not meet the design requirements, which has a significant impact on the optical system.

[0045] The inventors discovered that the difficulty in machining the aforementioned arc-shaped spring 103 stems from two main reasons. Firstly, the outer surface of the arc-shaped spring 103 is hollow. When the machining tool cuts the inner surface, the spring 103 elastically bends outwards radially, preventing the tool from cutting according to the set cutting amount. Secondly, improper machining parameter settings cause the arc-shaped spring 103 to vibrate during cutting, affecting its machining accuracy. Current machining processes lack real-time monitoring of the deformation of the arc-shaped spring 103, making real-time adjustment and control impossible. Regarding the first reason, the inventors suggest a two-step process: roughing followed by finishing. For example, the inner surface of the arc-shaped spring 103 can be machined using conventional methods with a certain finishing allowance, and then finished to the designed dimensions. During the finishing process, by designing a suitable machining device, the side of the arc-shaped spring piece 103 away from the cylindrical body 101 is abutted. In this case, when the cutting tool of the machining equipment finishes the inner side of the arc-shaped spring piece 103, the outer side of the arc-shaped spring piece 103 is abutted, thus the inner side of the arc-shaped spring piece 103 can be accurately machined. For the second reason, a fixture is designed to monitor the machining deformation of the arc-shaped spring piece 103 in real time. When the detected machining deformation of the arc-shaped spring piece 103 exceeds a set value, the machining parameters are adjusted to keep the machining deformation of the arc-shaped spring piece 103 within the allowable range, thereby ensuring the finishing accuracy of the inner side of the arc-shaped spring piece 103.

[0046] Based on the above analysis, and according to the embodiments of this application, refer to Figure 3 and Figure 4 A primary and secondary mirror support processing device is provided, comprising: a base plate 2, a support cylinder 3, multiple arc-shaped fixing seats 4, a sensor mounting seat 6, and a display device 9.

[0047] refer to Figure 3 The bottom plate 2 has a circular boss 201 on one side surface. The outer diameter of the circular boss 201 is smaller than the inner diameter of the secondary mirror fixing ring 102. The circular boss 201 and the bottom plate 2 are used to position the first end of the cylindrical body 101.

[0048] refer to Figure 3 and Figure 4 The support cylinder 3 has a first end and a second end along the axial direction. The first end of the support cylinder 3 is vertically fixed to the base plate 2, and the central axis of the support cylinder 3 coincides with the central axis of the circular boss 201. The inner diameter of the support cylinder 3 is larger than the outer diameter of the cylindrical body 101, and the interior is used to accommodate the cylindrical body 101.

[0049] refer to Figure 3Multiple arc-shaped fixing seats 4 are evenly distributed at the second end of the cylindrical body 101. Each arc-shaped fixing seat 4 is fixedly connected to the second end of the support cylinder 3, and has an arc surface 401 with the same inner diameter as the support cylinder 3 on the side facing the central axis of the support cylinder 3. At least two first threaded holes 402 are provided on the arc-shaped fixing seat 4, which extend radially along the support cylinder 3. The two first threaded holes 402 are in the same plane parallel to the bottom plate 2. A first bolt 5 is threaded into each first threaded hole 402. The first bolt 5 is used to abut against the cylindrical body 101.

[0050] refer to Figure 3 The sensor mounting base 6 is fixedly connected to the side of the arc-shaped fixing base 4 opposite to the second end of the support cylinder 3. (Reference) Figure 7 The sensor mounting base 6 is provided with a first mounting hole 601 extending radially along the support cylinder 3. An eddy current sensor 7 with its detection probe facing the central axis of the cylindrical body 101 is installed in the first mounting hole 601. A metal sensing block 8 is fixedly connected to the side of the arc-shaped spring sheet 103 away from the central axis of the cylinder. The eddy current sensor 7 is used to sense the displacement L between the metal sensing block 8 and the detection probe of the eddy current sensor 7. The display device 9 is electrically connected to the eddy current sensor and is used to display the value of the displacement L monitored by the eddy current sensor in real time.

[0051] In the above embodiments, reference is made to Figure 5 and Figure 6Since the primary and secondary mirror bracket 1 is placed inside the support cylinder 3 and positioned by the secondary mirror fixing ring 102 at the first end of the primary and secondary mirror bracket 1 and the surface of the base plate 2, after the primary and secondary mirror bracket 1 is positioned, the primary and secondary mirror bracket 1 can be fixed inside the support cylinder 3 by tightening the first bolt 5 on the arc-shaped fixing seat 4. Then, the primary and secondary mirror bracket 1 processing device is installed on the processing equipment for precision machining. On the one hand, since the metal sensing block 8 is fixedly connected to the outer side of the arc-shaped spring piece 103, and the metal sensing block 8 fills the pit formed by the outer side of the arc-shaped spring piece 103 and the radial through hole, when the tool processes the inner side of the arc-shaped spring piece 103, the second bolt 10 on the sensor mounting seat 6 can apply a resisting force to the metal sensing block 8, which can prevent the arc-shaped spring piece 103 from undergoing radial elastic bending deformation under the action of the tool. Therefore, the inner side of the arc-shaped spring piece 103 can be precisely precision machined. On the other hand, since the eddy current sensor 7 is fixedly installed on the sensor mounting base 6 and the metal sensing block 8 is fixedly connected to the outer side of the arc-shaped spring 103, the displacement change sensed by the eddy current sensor 7 is the radial deformation of the arc-shaped spring 103. This deformation is displayed in real time by the display device 9. During the finishing process of the arc-shaped spring 103, the operator can adjust the spindle speed, cutting amount and feed rate of the machining equipment in real time according to the machining deformation amount, so that the machining deformation of the arc-shaped spring 103 is within a suitable range, and thus the inner side of the arc-shaped spring 103 is machined.

[0052] In the above embodiment, the eddy current sensor 7 and the metal sensing block 8 are used to sense the deformation of the arc-shaped spring 103. The eddy current sensor 7 and the metal sensing block 8 constitute an eddy current sensor. When a high-frequency alternating current passes through the coil inside the detection probe of the eddy current sensor 7, an alternating magnetic field is generated. The alternating magnetic field induces eddy currents on the surface of the metal sensing block 8 and generates a reverse magnetic field. The reverse magnetic field weakens the original magnetic field, causing the equivalent impedance of the detection probe coil to change. When other parameters (material conductivity, etc.) are fixed, the equivalent impedance can be simplified to a single-valued function of distance. By converting the equivalent impedance into a voltage or current signal and performing linearization processing, an electrical signal proportional to the distance is output. Through data acquisition and post-processing, it is used to monitor the deformation of the part during clamping. During the machining process, through data acquisition and post-processing, the cutting deformation of the arc-shaped spring 103 during the cutting process is monitored. If the cutting deformation is greater than the set size, it is necessary to manually adjust the machining parameters such as the cutting width, feed rate, and spindle speed of the machining equipment to ensure the dimensional accuracy and surface roughness requirements of the part. In other embodiments, other linear sensors may be used, such as potentiometer-type, inductive, and capacitive types. This application does not limit the application to these types.

[0053] According to the embodiments of this application, refer to Figure 7As shown, to ensure that the metal sensing block 8 is reliably supported by the support cylinder 3, a plurality of second threaded holes 602 extending radially along the support cylinder 3 are provided on the sensor mounting base 6. A second bolt 10 is provided in each second threaded hole 602, and the second bolt 10 is used to abut against the outer side of the metal sensing block 8 radially. In this embodiment, there are three second threaded holes 602, and correspondingly, there are also three second bolts 10.

[0054] According to the embodiments of this application, refer to Figure 7 As shown, in order to ensure reliable contact between the metal sensing block 8 and the arc-shaped spring 103, the radius of curvature of the side of the metal sensing block 8 facing the arc-shaped spring 103 is equal to the radius of curvature of the side of the arc-shaped spring 103 facing the metal sensing block 8.

[0055] To further ensure a tight fit and connection between the curved spring piece 103 and the metal sensing block 8, refer to Figure 5 and Figure 6 The primary and secondary mirror support processing device may further include an adhesive layer 11 disposed between the arc-shaped spring 103 and the metal sensing block 8. The adhesive layer 11 can be formed by solidifying liquid adhesive. The adhesive should be selected as a colloid with high hardness after curing and capable of resisting the lateral force of the tool during processing.

[0056] According to the embodiments of this application, refer to Figures 1 to 5 As shown, the metal sensing block 8 is provided with an adhesive groove 801 on the side facing the arc-shaped spring sheet 103, and an adhesive injection hole 802 is provided on the metal sensing block 8 extending radially along the support cylinder 3. The adhesive injection hole 802 penetrates the metal sensing block 8 and is used to inject adhesive into the adhesive groove 801.

[0057] According to the embodiments of this application, refer to Figure 6 As shown, the eddy current sensor 7 is cylindrical, as referenced. Figure 7 As shown, the sensor mounting base 6 is provided with a third threaded hole 603 that is perpendicular to the central axis of the first mounting hole 601 and communicates with the first mounting hole 601. A third bolt is threaded into the third threaded hole 603, and the third bolt is used to fix the eddy current sensor 7. The position of the eddy current sensor 7 in the sensor mounting hole can be adjusted by the third bolt, thereby adjusting the distance between the detection probe of the eddy current sensor 7 and the metal sensing block 8.

[0058] According to the embodiments of this application, refer to Figure 6As shown, an adhesive block 12 is provided between the free end of the arc-shaped spring piece 103 and the edge of the radial through hole. When the position of the cylindrical body 101 in the support cylinder 3 is determined and fixed, and the distance between the sensor mounting base 6 and the metal sensing block 8 is fixed, in order to further fix the relative position between the arc-shaped spring piece 103 and the cylindrical body 101, liquid adhesive is applied between the free end of the arc-shaped spring piece 103 and the edge of the radial through hole of the cylindrical body 101. The liquid adhesive is allowed to solidify to form the adhesive block 12.

[0059] According to an embodiment of this application, the adhesive layer 11 is formed by curing liquid structural adhesive, and the adhesive blocks 12 are all formed by curing liquid structural adhesive.

[0060] The beneficial effects of the primary and secondary mirror support processing device provided in the above embodiments are reflected in the following aspects:

[0061] 1. This set of fixtures can be used to reinforce the arc-shaped spring piece 103 of the primary and secondary mirror bracket type 1 parts, increase the overall rigidity of the arc-shaped spring piece 103, and achieve clamping with little or no deformation.

[0062] Second, this set of fixtures and methods can improve the machining accuracy and efficiency of eyeglass frame parts, and increase the pass rate of parts.

[0063] Secondly, this application also provides a method for processing primary and secondary lens holders, applied to the aforementioned primary and secondary lens holder processing apparatus, comprising the following steps:

[0064] Step 1: Fix the support cylinder 3 to the base plate 2, so that the central axis of the circular boss 201 is collinear with the central axis of the support cylinder 3;

[0065] Step 2: Fix the metal sensing block 8 to the side of the arc-shaped spring piece 103 that is away from the central axis of the cylinder;

[0066] Step 3: Place the cylindrical body 101 with the metal sensing block 8 inside the support cylinder 3, so that the secondary mirror fixing ring 102 is concentrically fitted on the circular boss 201 of the base plate 2, adjust the distance between the detection probe of the eddy current sensor 7 and the outer wall of the cylindrical body 101 to 1mm, and fix the eddy current sensor 7.

[0067] Step 4: Adjust the first bolt 5 on each arc-shaped fixing seat 4 so that the displacement L collected by the eddy current sensor 7 on each arc-shaped fixing seat 4 satisfies: L < 8 μm;

[0068] Step 5: Adjust the second bolt 10 on each sensor mounting base 6 so that the displacement L collected by the eddy current sensor 7 on each sensor mounting base 6 satisfies: L≤12μm;

[0069] Step 6: Place adhesive block 12 between the free end of the arc-shaped spring piece 103 and the edge of the radial through hole, and wait for it to cure;

[0070] Step 7: Securely connect the base with the cylindrical component to the processing equipment, and perform precision machining on the side of the arc-shaped spring 103 facing the center;

[0071] Step 8: Based on the real-time displacement change of the displacement L monitored by the eddy current sensor displayed on the display device. The processing parameters are adjusted in real time to control the amount of processing deformation.

[0072] Furthermore, in step eight, the displacement change displayed in real time by the display device during the processing stage... When the displacement is >10μm, the displacement change can be reduced by adjusting the processing parameters. Keep it within 10μm.

[0073] Furthermore, step two, which involves fixing the metal sensing block 8 to the side of the arc-shaped spring 103 opposite to the central axis of the cylinder, includes the following sub-steps:

[0074] Step 2.1: Attach one side of each of the four double-sided adhesive tapes to the four corners of the outer side of the curved spring piece 103, and then attach the metal sensor block 8 to the other side of the four double-sided adhesive tapes;

[0075] Step 2.2: Inject liquid structural adhesive into the metal sensing block 8 and the arc-shaped spring sheet 103 through the injection hole 802, and wait for the liquid structural adhesive to cure to form an adhesive layer 11.

[0076] The preferred embodiments of this disclosure have been described in detail above with reference to the accompanying drawings. However, this disclosure is not limited to the specific details of the above embodiments. Within the scope of the technical concept of this disclosure, various simple modifications can be made to the technical solutions of this disclosure, and these simple modifications all fall within the protection scope of this disclosure.

[0077] It should also be noted that the various specific technical features described in the above embodiments can be combined in any suitable manner without contradiction. To avoid unnecessary repetition, this disclosure will not describe the various possible combinations separately.

[0078] Furthermore, various different embodiments of this disclosure can be combined in any way, as long as they do not violate the spirit of this disclosure, they should also be regarded as the content disclosed in this disclosure.

Claims

1. A primary and secondary mirror support processing device, wherein the primary and secondary mirror support (1) includes a cylindrical body (101), a secondary mirror fixing ring (102) disposed at the center of a first end of the cylindrical body (101), and a plurality of arc-shaped spring pieces (103) evenly distributed on the inner wall of a second end of the cylindrical body (101), wherein the cylindrical body (101) is provided with radial through holes of the same shape as the arc-shaped spring pieces (103), one end of each arc-shaped spring piece (103) is integrally formed with part of the edge of the radial through hole, and the other end is a free end, and the arc-shaped spring piece (103) can undergo elastic bending deformation when subjected to radial force, characterized in that, The primary and secondary mirror support processing device includes: The base plate (2) has a circular boss (201) on one side surface. The outer diameter of the circular boss (201) is smaller than the inner diameter of the secondary mirror fixing ring (102). The circular boss (201) and the base plate (2) are used to position the first end of the cylindrical body (101). The support cylinder (3) has a first end and a second end along the axial direction. The first end of the support cylinder (3) is vertically fixed to the base plate (2), and the central axis of the support cylinder (3) coincides with the central axis of the circular boss (201). The inner diameter of the support cylinder (3) is larger than the outer diameter of the cylindrical body (101), and the interior is used to accommodate the cylindrical body (101). A plurality of arc-shaped fixing seats (4) are evenly distributed at the second end of the cylindrical body (101). Each arc-shaped fixing seat (4) is fixedly connected to the second end of the support cylinder (3), and has an arc surface (401) with the same inner diameter as the support cylinder (3) on one side facing the central axis of the support cylinder (3). At least two first threaded holes (402) are provided on the arc-shaped fixing seat (4) extending radially along the support cylinder (3). The two first threaded holes (402) are in the same plane parallel to the bottom plate (2). A first bolt (5) is threaded into each first threaded hole (402). The first bolt (5) is used to abut against the cylindrical body (101). The sensor mounting base (6) is fixedly connected to the side of the arc-shaped fixed base (4) away from the second end of the support cylinder (3). The sensor mounting base (6) is provided with a first mounting hole (601) extending radially along the support cylinder (3). An eddy current sensor (7) with a detection probe facing the central axis of the cylindrical body (101) is installed in the first mounting hole (601). A metal sensing block (8) is fixedly connected to the side of the arc-shaped spring sheet (103) away from the central axis of the cylinder. The eddy current sensor (7) is used to sense the displacement L between the metal sensing block (8) and the detection probe of the eddy current sensor (7). And a display device (9), which is electrically connected to the eddy current sensor and is used to display the value of the displacement L monitored by the eddy current sensor in real time.

2. The primary and secondary mirror support processing device according to claim 1, characterized in that, The sensor mounting base (6) is provided with a plurality of second threaded holes (602) extending radially along the support cylinder (3), and a second bolt (10) is provided in each second threaded hole (602). The second bolt (10) is used to abut against the outer side of the metal sensing block (8) radially.

3. The primary and secondary mirror support processing device according to claim 2, characterized in that, The radius of curvature of the metal sensing block (8) facing the arc-shaped spring (103) is equal to the radius of curvature of the arc-shaped spring (103) facing the metal sensing block (8).

4. The primary and secondary mirror support processing device according to claim 3, characterized in that, It also includes an adhesive layer (11) disposed between the arc-shaped spring sheet (103) and the metal sensing block (8).

5. The primary and secondary mirror support processing device according to claim 4, characterized in that, The metal sensing block (8) is provided with an adhesive groove (801) on the side facing the arc-shaped spring (103). The metal sensing block (8) is provided with an adhesive injection hole (802) extending radially along the support cylinder (3). The adhesive injection hole (802) penetrates the metal sensing block (8) and is used to inject adhesive into the adhesive groove (801).

6. The primary and secondary mirror support processing device according to claim 5, characterized in that, The eddy current sensor (7) is cylindrical. The sensor mounting base (6) is provided with a third threaded hole (603) that is perpendicular to the central axis of the first mounting hole (601) and communicates with the first mounting hole (601). A third bolt is threaded into the third threaded hole (603) and is used to fix the eddy current sensor (7).

7. The primary and secondary mirror support processing device according to claim 6, characterized in that, An adhesive block (12) is provided between the free end of the arc-shaped spring sheet (103) and the edge of the radial through hole. The adhesive layer (11) is formed by curing liquid structural adhesive, and the adhesive blocks (12) are all formed by curing liquid structural adhesive.

8. A method for processing a primary and secondary mirror support, applied to the primary and secondary mirror support processing apparatus as described in claim 7, characterized in that, Includes the following steps: Step 1: Fix the support cylinder to the base plate so that the central axis of the circular boss is collinear with the central axis of the support cylinder; Step 2: Fix the metal sensing block to the side of the arc-shaped spring sheet that is away from the central axis of the cylinder; Step 3: Place the cylindrical body with the metal sensing block inside the support cylinder, and make the secondary mirror fixing ring concentrically fitted on the circular protrusion of the base plate. Adjust the distance between the eddy current sensor detection probe and the outer wall of the cylindrical body to 1mm, and fix the eddy current sensor. Step 4: Adjust the first bolt on each arc-shaped fixing seat so that the displacement L collected by the eddy current sensor on each arc-shaped fixing seat satisfies: L < 8 μm; Step 5: Adjust the second bolt on each sensor mounting base so that the displacement L collected by the eddy current sensor on each sensor mounting base satisfies: L≤12μm; Step 6: Place an adhesive block between the free end of the arc-shaped spring piece and the edge of the radial through hole, and wait for it to cure; Step 7: Securely connect the base with the cylindrical component to the processing equipment, and perform precision machining on the side of the arc-shaped spring sheet facing the center; Step 8: Based on the real-time displacement change of the displacement L monitored by the eddy current sensor displayed on the display device. The processing parameters are adjusted in real time to control the amount of processing deformation.

9. The method for processing the primary and secondary mirror support according to claim 8, characterized in that, In step eight, the displacement change displayed in real time by the display device during the processing stage... When the displacement is >10μm, the displacement change can be reduced by adjusting the processing parameters. Keep it within 10μm.

10. The method for processing the primary and secondary mirror support according to claim 8, characterized in that, Step two, fixing the metal sensing block to the side of the arc-shaped spring sheet away from the central axis of the cylinder, includes the following sub-steps: Step 2.1: Attach one side of each of the four double-sided tapes to the four corners of the outer side of the curved spring, and then attach the metal sensor block to the other side of the four double-sided tapes; Step 2.2: Inject liquid structural adhesive into the metal induction block and the arc-shaped spring through the injection hole, and wait for the liquid structural adhesive to cure to form an adhesive layer.

Images