A stress disc suitable for small and medium caliber aspheric mirror processing

Abstract

The present application relates to the technical field of machining, and particularly provides a stress disc suitable for machining of small and medium caliber aspheric mirrors, comprising a disc group, a gas bag unit, an inner sleeve and an outer sleeve, wherein the disc group comprises a circular ring type base disc, an inner cylinder, outer vertical plates and inner vertical plates, the inner sleeve is embedded between the inner cylinder and the inner vertical plates, the outer sleeve is embedded between the inner vertical plates and the outer vertical plates, the inner sleeve and the outer sleeve are circumferentially distributed with a plurality of gas bag mounting holes, each gas bag mounting hole is provided with a gas bag unit, the pressure of each gas bag unit on each outer vertical plate and each inner vertical plate is changed by controlling the inflation amount of each gas bag, and then the deformation amount of the circular ring type base disc is changed through the outer vertical plates and the inner vertical plates. The present application realizes miniaturization of the stress disc structure, and breaks through the dilemma that small grinding heads are low in efficiency and large stress discs cannot be used to machine small and medium caliber aspheric mirrors.

Description

Technical Field

[0001] This invention belongs to the field of machining technology, and in particular relates to a stress plate suitable for machining small and medium diameter aspherical mirrors. Background Technology

[0002] In modern large-scale optical systems, the secondary and tertiary mirrors of large-aperture telescopes are mostly small to medium diameters with exceptionally steep surfaces, making them difficult to manufacture. However, they are widely used in optical systems because they simplify system structure, reduce system mass, and decrease system size. Therefore, the development of high-steep aspherical mirrors is of paramount importance to the advancement of space optics and astronomical observation. Simultaneously, with the development of these applications, higher demands are placed on the manufacturing precision and efficiency of high-steep aspherical mirrors.

[0003] Currently, computer numerical control (CNC) optical surface forming technology is mainly used in the processing of high-steep aspherical surfaces, including small grinding head technology, stress plate processing technology, and magnetorheology. When using small grinding head technology for mirror forming, because it needs to match the high-steep aspherical surface, a small-sized grinding head (only 5-10mm for high-steep precision polishing) is required, resulting in low material removal efficiency and easily causing uneven removal and mid-to-high frequency errors, affecting image quality. In contrast, stress plate technology actively deforms to achieve high-precision matching of the aspherical surface, with no limitation on grinding head size (reaching 1 / 4 to 1 / 3 of the mirror aperture or even the full aperture), high material removal efficiency, and suppression of mid-to-high frequency errors. It is an ideal method to solve the insufficient efficiency of small grinding head technology in processing high-steep aspherical surfaces. However, existing stress plate processing technology uses electromagnetic drive and force drive to achieve plate surface deformation. Therefore, it requires the installation of control components such as force drive or electromagnetic drive. This results in a relatively complex stress plate structure and a large plate size, which cannot meet the processing requirements of small and medium diameter high steepness aspherical surfaces. It can only be applied to the processing of large diameter high steepness aspherical mirrors.

[0004] Therefore, there is an urgent need to design a solution to address the problems of low processing efficiency of small grinding heads and the inability of large stress disks to adapt to small-diameter, high-steep aspherical surfaces. Summary of the Invention

[0005] In view of this, the present invention aims to provide a stress plate suitable for processing small and medium diameter aspherical mirrors. By improving the structure and driving method of the stress plate, adopting a ring structure and airbag driving method, the stress plate structure is miniaturized, overcoming the difficulties of low efficiency of small grinding heads and the inability of large stress plates to process small and medium diameter aspherical mirrors. It has the advantages of good adaptability, high processing efficiency and high surface quality of aspherical mirrors.

[0006] To achieve the above objectives, the technical solution created by this invention is implemented as follows: This invention provides a stress plate suitable for processing small and medium diameter aspherical mirrors, comprising: a plate assembly, an airbag unit, an inner sleeve, and an outer sleeve; The panel assembly includes a concentrically distributed annular base, an inner cylinder, multiple outer vertical plates, and multiple inner vertical plates. The inner cylinder is vertically arranged on the upper surface of the inner diameter edge of the annular base. The multiple inner vertical plates are evenly distributed on the upper surface of the annular base with a first preset radius, and the multiple outer vertical plates are evenly distributed on the upper surface of the annular base with a second preset radius. Both the inner sleeve and the outer sleeve are annular. The inner sleeve is embedded between the inner cylinder and multiple inner vertical plates; the outer sleeve is embedded between multiple inner vertical plates and multiple outer vertical plates; both the inner sleeve and the outer sleeve have multiple airbag mounting holes distributed along the circumference. Each airbag mounting hole contains an airbag unit, which includes a leaking column and an airbag wrapped around the outer surface of the leaking column. By controlling the inflation amount of each airbag, the pressure of each airbag unit on each outer and inner vertical plate is changed, thereby changing the deformation of the annular chassis through the outer and inner vertical plates.

[0007] Preferably, the annular chassis, inner cylinder, and multiple outer and inner vertical plates are integrally processed and formed.

[0008] Preferably, the number of airbag mounting holes on the outer sleeve is greater than the number of airbag mounting holes on the inner sleeve.

[0009] Preferably, the number of airbag mounting holes on the outer sleeve is equal to the number of outer upright plates, and their positions correspond one-to-one; the number of airbag mounting holes on the inner sleeve is equal to the number of inner upright plates, and their positions correspond one-to-one.

[0010] Preferably, the diameter of the annular base is equal to the diameter of the small-diameter aspherical mirror to be processed. to .

[0011] Preferably, the lower surface of the annular chassis is also provided with annular polishing adhesive.

[0012] Preferably, the surface of the polishing adhesive has grooves arranged in a crisscross pattern.

[0013] Preferably, both the inner sleeve and the outer sleeve have a segmented structure.

[0014] Preferably, both the inner sleeve and the outer sleeve include an outer sub-lobes and an inner sub-lobes; The outer sub-segment of the inner sleeve abuts against the inner vertical plate, and the inner sub-segment of the inner sleeve abuts against the inner cylinder. By changing the inflation volume of the airbag in any airbag mounting hole, the inner vertical plate at the corresponding position is squeezed, and the inner vertical plate drives the corresponding position of the annular chassis to deform. The outer sub-segments of the outer sleeve abut against the outer upright plate, and the inner sub-segments of the outer sleeve abut against the inner cylinder. By changing the inflation volume of the airbag in any airbag mounting hole, the inner upright plate and the outer force plate at the corresponding position are squeezed, and the inner upright plate and the outer force plate drive the corresponding position of the annular chassis to deform.

[0015] Preferably, the airbag unit also includes a buckle for securing the upper and lower openings of the airbag.

[0016] Compared with the prior art, the present invention can achieve the following beneficial effects: This invention employs a ring structure and an airbag-driven mechanism. By compressing the outer and inner vertical plates, the circular chassis undergoes slight deformation. The chassis, inner cylinder, inner vertical plate, and outer vertical plate are integrally formed and processed. Combined with the interlocking structure of the inner and outer sleeves, this eliminates the need for bulky components such as electromagnets, polygonal fixing columns, and force actuators required in traditional stress plates. The airbag, as the driving element, is small in size and lightweight, making the entire stress plate structure compact and suitable for processing small-to-medium diameter (0.5m~1m) high-steep aspherical mirrors. This solves the problem that existing stress plates are not suitable for processing small-to-medium diameter (0.5m~1m) high-steep aspherical mirrors.

[0017] This invention utilizes air pressure to continuously and precisely adjust the surface shape of the disk via an external air source. Compared to the on / off or stepped control of electromagnetic drive, air pressure drive achieves smoother and more continuous operation, greatly improving processing efficiency. Simultaneously, the processed surface is mirror-smooth, and mid-to-high frequency errors are effectively suppressed. Furthermore, this stress disk can also be used for processing other small-diameter (0.3~0.5m) high-steepness complex curved surface components. Attached Figure Description

[0018] The accompanying drawings, which form part of this invention, are used to provide a further understanding of the invention. The illustrative embodiments and descriptions of the invention are used to explain the invention and do not constitute an undue limitation of the invention. In the drawings: Figure 1 This is a top view of a stress plate suitable for processing small and medium diameter aspherical mirrors according to an embodiment of the present invention; Figure 2 This is a cross-sectional view of a stress plate suitable for processing small and medium diameter aspherical mirrors according to an embodiment of the present invention; Figure 3 This is a schematic diagram of the structure of the polishing adhesive provided in an embodiment of the present invention; Figure 4 This is a schematic diagram of mirror surface processing using a stress plate suitable for processing small and medium diameter aspherical mirrors, according to an embodiment of the present invention.

[0019] The reference numerals in the figures include: 1. Circular chassis; 2. Outer vertical plate; 3. Inner vertical plate; 4. Inner cylinder; 5. Outer sleeve; 6. Inner sleeve; 7. Airbag; 8. Leaking column; 9. Buckle; 10. Polishing adhesive; 11. Air pipe. Detailed Implementation

[0020] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and specific embodiments. It should be understood that the specific embodiments described herein are only for explaining the invention and do not constitute a limitation thereof. Similar elements in different embodiments are referred to by associated similar element reference numerals. In the following embodiments, many details are described to facilitate a better understanding of the invention. However, those skilled in the art will readily recognize that some features may be omitted in different situations, or may be replaced by other elements, materials, or methods. In some cases, some operations related to the invention are not shown or described in the specification. This is to avoid obscuring the core parts of the invention with excessive description. For those skilled in the art, detailed description of these related operations is not necessary; the relevant operations can be fully understood based on the description in the specification and general technical knowledge in the art.

[0021] It should be noted that, unless otherwise specified, the embodiments and features described in this invention can be combined to form various implementations. Furthermore, the order of the steps or actions in the method description can be changed or adjusted in a manner readily apparent to those skilled in the art. Therefore, the various orders in the specification and drawings are merely for the clear description of a particular embodiment and do not imply a mandatory order, unless otherwise stated that a particular order must be followed.

[0022] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," and "counterclockwise," etc., indicating orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on this invention. Furthermore, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, features defined with "first," "second," etc., may explicitly or implicitly include one or more of that feature. In the description of this invention, unless otherwise stated, "a plurality of" means two or more.

[0023] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art will understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0024] The invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0025] Please see Figure 1 and Figure 2 In one embodiment of the present invention, a stress plate suitable for processing small and medium diameter aspherical mirrors is provided, comprising: a plate assembly, an airbag unit, an inner sleeve 6 and an outer sleeve 5; The plate assembly includes a concentrically distributed annular base 1, an inner cylinder 4, and multiple outer vertical plates 2 and multiple inner vertical plates 3. The inner cylinder 4 is vertically arranged on the upper surface of the inner diameter edge of the annular base 1. The multiple inner vertical plates 3 are evenly distributed on the upper surface of the annular base 1 with a first preset radius, and the multiple outer vertical plates 2 are evenly distributed on the upper surface of the annular base 1 with a second preset radius. Both the inner sleeve 6 and the outer sleeve 5 are annular. The inner sleeve 6 is embedded between the inner cylinder 4 and multiple inner vertical plates 3; the outer sleeve 5 is embedded between multiple inner vertical plates 3 and multiple outer vertical plates 2; both the inner sleeve 6 and the outer sleeve 5 have multiple airbag mounting holes distributed along the circumference. Each airbag mounting hole is equipped with an airbag unit, which includes an air leakage column 8 and an airbag 7 wrapped around the outer surface of the air leakage column 8. By controlling the inflation amount of each airbag 7, the pressure of each airbag unit on each outer upright plate 2 and each inner upright plate 3 is changed, thereby changing the deformation of the annular chassis 1 through the outer upright plate 2 and the inner upright plate 3.

[0026] The disk assembly is manufactured as a single piece and includes a concentrically distributed annular base 1, inner cylinders 4, multiple outer upright plates 2, and multiple inner upright plates 3. The annular base 1 is made of aluminum and is ring-shaped. Typically, the effective diameter of the annular base 1 is designed to be the diameter of the small-diameter aspherical mirror to be processed. to The diameter of the small-diameter aspherical mirror here is 0.5m to 1m. The annular base 1 includes machined and unmachined surfaces. The inner cylinder 4, multiple outer vertical plates 2, and multiple inner vertical plates 3 are all disposed on the unmachined surface, i.e., the upper surface of the annular base 1. The center of the inner cylinder 4 coincides with the center of the annular base 1 and is vertically fixed to the upper surface of the inner ring edge of the annular base 1. The multiple inner vertical plates 3 are vertically and evenly distributed on the upper surface of the annular base 1 with a first preset radius. Normally, the inner vertical plates 3 are located at the half-circle width of the annular base 1. In this embodiment of the invention, the number of inner vertical plates 3 is set to 8, which are evenly distributed on the same circle at equal intervals. The shape of the inner vertical plates 3 can be either straight plates or curved plates. The multiple outer vertical plates 2 are vertically and evenly distributed on the upper surface of the annular base 1 with a second preset radius. Normally, the outer vertical plates 2 are located at the outer edge of the annular base 1. In this embodiment of the invention, the number of outer panels 2 is set to 12, which are also evenly distributed on the same circle at equal intervals. The shape of the outer panels 2 can be either a straight plate or a curved plate.

[0027] In practical applications, the number of airbag units, outer uprights 2, and inner uprights 3 can also be other values. The specific number is determined according to the diameter of the annular chassis 1. The larger the diameter of the annular chassis 1, the more airbag units, outer uprights 2, and inner uprights 3 can be installed, and the higher the control accuracy.

[0028] like Figure 3 As shown, a layer of polishing adhesive 10 is applied to the machining surface of the annular base 1. The shape of the polishing adhesive 10 is the closest to a sphere to the small-diameter aspherical mirror to be machined, and the thickness of the polishing adhesive 10 is ensured to be equal at every point. The polishing adhesive 10 can be selected appropriately according to the processing requirements. Diamond pellets or hard sandbags can be used in the fine grinding stage, while polishing asphalt can be used in the polishing stage. Simultaneously, crisscrossing grooves are provided on the machining surface of the polishing adhesive 10 to achieve the grinding process.

[0029] A ring-shaped space is formed between the inner cylinder 4 and multiple inner vertical plates 3, and between multiple outer vertical plates 2 and multiple inner vertical plates 3. An inner sleeve 6 is embedded between the inner cylinder 4 and multiple inner vertical plates 3, and an outer sleeve 5 is embedded between the multiple outer vertical plates 2 and multiple inner vertical plates 3. Both the inner sleeve 6 and the outer sleeve 5 are annular and concentric with the annular base 1. The inner sleeve 6 and the outer sleeve 5 are usually designed with the same thickness, but in special cases, they can also be designed with different thicknesses. The outer sleeve 5 has multiple airbag mounting holes inside, which are evenly arranged along the center of the outer sleeve 5, and the design position of each airbag mounting hole corresponds one-to-one with the position of an outer vertical plate 2. Therefore, the outer sleeve 5 has a total of 12 airbag mounting holes. Similarly, the inner sleeve 6 has multiple airbag mounting holes inside. These multiple airbag mounting holes are evenly arranged along the center of the inner sleeve 6, and the design position of each airbag mounting hole corresponds one-to-one with the position of an inner vertical plate 3. Therefore, the inner sleeve 6 has a total of 8 airbag mounting holes.

[0030] Each airbag mounting hole contains one airbag unit. The inner sleeve 6 and outer sleeve 5 together house 20 airbag units, used to transmit compressive force and secure the airbag units. Each airbag unit mainly includes an airbag 7, a leaking column 8, and a clip 9. The leaking column 8 is 3D printed and has at least one small leaking hole on its outer surface in the middle section for inflating the airbag 7. The airbag 7 completely covers the outside of the leaking column 8, and clips 9 are located at the upper and lower openings of the airbag 7 to secure it and prevent leakage. Figure 4 As shown, an air pipe interface is provided on the end face of the leaking column 8 away from the annular chassis 1 for connecting the air pipe 11. Each airbag unit corresponds to a separate air pipe 11, meaning that the inflation volume of the airbag 7 in each airbag unit can be independently controlled. By adjusting the inflation volume of the airbag 7, the air pressure and expansion volume of the airbag 7 can be changed. The airbag 7 compresses the inner sleeve 6 and the outer sleeve 5, thereby compressing the corresponding outer upright plate 2 and inner upright plate 3. After being pushed, the outer upright plate 2 and inner upright plate 3 transmit the force to the annular chassis 1 integrally formed with it, causing the annular chassis 1 to bulge outward at the angle position of the outer upright plate 2 and inner upright plate 3. By precisely controlling the inflation volume of each airbag 7, the local deformation of the annular chassis 1 corresponding to each outer upright plate 2 and inner upright plate 3 can be independently adjusted, thereby achieving fine control of the surface shape of the annular chassis 1.

[0031] As an optional embodiment, both the inner sleeve 6 and the outer sleeve 5 are segmented structures, each including an outer sub-segment and an inner sub-segment. The outer sub-segments of the inner sleeve 6 abut against the inner surfaces of multiple inner vertical plates 3; the inner sub-segments of the inner sleeve 6 abut against the outer surfaces of the inner cylinder 4. When a force needs to be applied to a certain position of the annular chassis 1, an external air source inflates the airbag 7 in the corresponding airbag mounting hole. After inflation, the airbag 7 expands. Since the airbag 7 is confined within the airbag mounting hole, its expansion force acts simultaneously on both the outer and inner sub-segments of the inner sleeve 6. The inner sub-segment is restricted in displacement by the inner cylinder 4, while the outer sub-segment is pushed outward by the airbag 7. This causes the outer sub-segment to press outward against the corresponding inner vertical plate 3. The inner vertical plate 3 transmits the force to the annular chassis 1 integrally formed with it, causing the annular chassis 1 to deform at the angular position of the inner vertical plate 3.

[0032] The outer sub-lobes of the outer sleeve 5 abut against the inner surfaces of multiple outer upright plates 2 one by one; the inner sub-lobes of the outer sleeve 5 abut against the outer surfaces of the inner upright plates 3. When a force needs to be applied to a certain position of the annular chassis 1, air is injected into the corresponding airbag mounting hole through an external air source. After the airbag 7 is inflated, it expands. Since the airbag 7 is confined within the airbag mounting hole, its expansion force acts simultaneously on the outer and inner sub-lobes of the outer sleeve 5. The airbag 7 pushes the outer sub-lobes of the outer sleeve 5 outward, causing them to press outward against the corresponding outer upright plates 2; the airbag 7 pushes the inner sub-lobes of the outer sleeve 5 inward, causing them to press inward against the corresponding inner upright plates 3. After the inner upright plates 3 and outer upright plates 2 are simultaneously subjected to thrust, the force is transmitted to the annular chassis 1 integrally formed with them. The synergistic action of the inner upright plates 3 and outer upright plates 2 allows the annular chassis 1 to undergo more complex deformations.

[0033] The stress plate of this invention, applicable to the processing of small and medium-diameter aspherical mirrors, can perform various movements such as rotation, translation, and planetary motion. Its pneumatic pressure control method offers advantages such as ease of control, high control precision, low cost, and compact, miniaturized structure. This stress plate can effectively correct several common low-order aberrations on the mirror surface, such as defocus, astigmatism, and coma, through active deformation, for small and medium-sized aspherical mirrors with diameters between 0.5 meters and 1 meter. The smoothness of the processed mirror surface and mid-to-high frequency errors can be effectively suppressed.

[0034] In summary, the above description is merely a preferred embodiment of this specification and is not intended to limit the scope of protection of this specification. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this specification should be included within the scope of protection of this specification.

[0035] The systems, apparatuses, modules, or units described in one or more of the above embodiments may be implemented by a computer chip or entity, or by a product having a certain function. A typical implementation device is a computer. Specifically, a computer may be, for example, a personal computer, a laptop computer, a cellular phone, a camera phone, a smartphone, a personal digital assistant, a media player, a navigation device, an email device, a game console, a tablet computer, a wearable device, or any combination of these devices.

[0036] It should also be noted that the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0037] The various embodiments in this specification are described in a progressive manner. Similar or identical parts between embodiments can be referred to interchangeably. Each embodiment focuses on describing the differences from other embodiments. In particular, the system embodiments are basically similar to the method embodiments, so the description is relatively simple; relevant parts can be referred to the descriptions in the method embodiments.

Claims

1. A stress plate suitable for processing small and medium diameter aspherical mirrors, characterized in that, include: Disc assembly, airbag unit, inner sleeve and outer sleeve; The disk assembly includes a concentrically distributed annular base, an inner cylinder, multiple outer vertical plates, and multiple inner vertical plates; the inner cylinder is vertically arranged on the upper surface of the inner diameter edge of the annular base, the multiple inner vertical plates are evenly distributed on the upper surface of the annular base with a first preset radius, and the multiple outer vertical plates are evenly distributed on the upper surface of the annular base with a second preset radius. Both the inner sleeve and the outer sleeve are annular. The inner sleeve is embedded between the inner cylinder and the plurality of inner vertical plates. The outer sleeve is embedded between the plurality of inner vertical plates and the plurality of outer vertical plates. Both the inner sleeve and the outer sleeve have a plurality of airbag mounting holes distributed along the circumference. Each airbag mounting hole is provided with an airbag unit, which includes a leaking column and an airbag wrapped around the outer surface of the leaking column. By controlling the inflation amount of each airbag, the pressure of each airbag unit on each outer and inner upright plate is changed, thereby changing the deformation of the annular chassis through the outer and inner upright plates.

2. The stress plate for processing small and medium diameter aspherical mirrors according to claim 1, characterized in that, The annular chassis, the inner cylinder, the multiple outer uprights, and the multiple inner uprights are integrally manufactured.

3. The stress plate for processing small and medium diameter aspherical mirrors according to claim 1, characterized in that, The number of airbag mounting holes on the outer sleeve is greater than the number of airbag mounting holes on the inner sleeve.

4. The stress plate for processing small and medium diameter aspherical mirrors according to claim 1, characterized in that, The number of airbag mounting holes on the outer sleeve is equal to the number of outer upright plates, and their positions correspond one-to-one; the number of airbag mounting holes on the inner sleeve is equal to the number of inner upright plates, and their positions correspond one-to-one.

5. The stress plate for processing small and medium diameter aspherical mirrors according to claim 1, characterized in that, The diameter of the annular base is the same as the diameter of the small-diameter aspherical mirror to be processed. to .

6. The stress plate for processing small and medium diameter aspherical mirrors according to claim 1, characterized in that, The lower surface of the annular chassis is also provided with annular polishing adhesive.

7. The stress plate for processing small and medium diameter aspherical mirrors according to claim 6, characterized in that, The surface of the polishing adhesive has grooves arranged in a crisscross pattern.

8. The stress plate for processing small and medium diameter aspherical mirrors according to claim 1, characterized in that, Both the inner sleeve and the outer sleeve have a segmented structure.

9. The stress plate for processing small and medium diameter aspherical mirrors according to claim 8, characterized in that, Both the inner sleeve and the outer sleeve include outer sub-lobes and inner sub-lobes; The outer sub-lobes of the inner sleeve abut against the inner upright plate, and the inner sub-lobes of the inner sleeve abut against the inner cylinder. By changing the inflation volume of the airbag in any airbag mounting hole, the inner upright plate at the corresponding position is squeezed, and the inner upright plate drives the corresponding position of the annular chassis to deform. The outer sub-segment of the outer sleeve abuts against the outer upright plate, and the inner sub-segment of the outer sleeve abuts against the inner cylinder. By changing the inflation volume of the airbag in any airbag mounting hole, the inner upright plate and the outer force plate at the corresponding position are squeezed, and the inner upright plate and the outer force plate drive the corresponding position of the annular chassis to deform.

10. The stress plate for processing small and medium diameter aspherical mirrors according to claim 1, characterized in that, The airbag unit also includes a buckle, which is used to fasten the upper and lower openings of the airbag.

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