A processing method for spherical mirror part structure

Abstract

This invention belongs to the field of aerospace precision manufacturing technology, specifically relating to a processing method for a spherical reflector component structure, including the following steps: processing the component body, firstly, the main processing body of the spherical reflector component is the mirror body component, and pre-reserved process handles are machined on both sides of the mirror body component; designing a CNC milling fixture, and fixing the mirror body component by the CNC milling fixture; designing a CNC turning fixture, and fixing the mirror body component by the CNC turning fixture, completing the spherical machining of the mirror body component; removing the process handles, installing split mounting ears at the process handle positions, and combining and machining the mirror body component and the split mounting ears. In summary, this invention has the advantages of convenient component fixing, high processing efficiency, and high surface curvature machining accuracy of the spherical reflector component.

Description

Technical Field

[0001] This invention belongs to the field of precision manufacturing technology for aerospace machinery, and specifically relates to a processing method for the structure of spherical reflector parts. Background Technology

[0002] The head-up display (HUD) projects flight parameters, targeting and attack information, and self-detection information as images and characters onto a light / electric display device on the front of the cockpit via optical components. When the pilot observes the outside world through the HUD, they can simultaneously see the characters and images superimposed on the scenery. Furthermore, the projection focal length is located at the front of the imaging glass, allowing the pilot to easily view flight parameters at any time with minimal eye focus changes, and visibility is not affected by sunlight. The spherical reflector is a crucial component in the HUD, acting as a deflector for the light path. It not only participates in system imaging but also serves as a tool for product assembly and adjustment. The spherical reflector itself has a unique structure and requires a high degree of curvature in its spherical surface, making it difficult to find the appropriate clamping position during machining, resulting in a relatively high degree of error in the machined spherical surface.

[0003] Patent application CN202310828265.X discloses a meniscus lens fixing device, comprising a support assembly, an adjustment assembly, a meniscus lens, support blocks, a clamping adjustment assembly, a clamping cover, and a base assembly. Two support blocks are symmetrically arranged on both sides of the meniscus lens. Sloping surfaces are symmetrically arranged on both sides of the meniscus lens, contacting the corresponding support block surfaces. Multiple support components are arranged circumferentially along the axis of the meniscus lens on the base assembly, with all support components contacting the curved surface of the meniscus lens. The clamping cover is connected to the base assembly and has multiple clamping adjustment components corresponding one-to-one with the support components. Each clamping adjustment component is connected to the clamping cover with a fixed torque and abuts against the end face of the meniscus lens. It is mainly used to fix meniscus lenses, facilitating their installation; however, the structure is still relatively complex, requiring multiple support components, and the surface processing technology of the meniscus lens is not modified.

[0004] Therefore, there is an urgent need for a machining method for spherical mirror parts, which would provide a clamping position for machining spherical mirror parts, while ensuring the accuracy of the machined surface, and solving the technical problems of inconvenient machining and low accuracy of existing machining methods. Summary of the Invention

[0005] In view of this, the present invention proposes a processing method for spherical reflector parts, which can be applied to the precision manufacturing of aerospace machinery. It solves the existing technical problems of inconvenient fixing, complex processing technology and low surface curvature processing accuracy of spherical reflector parts, and has high application and promotion value.

[0006] To achieve the above-mentioned technical objectives, the specific technical solution adopted by the present invention is as follows:

[0007] A method for processing a spherical reflector component structure includes the following steps:

[0008] Step 1: Machining the main body of the part. First, the main body of the spherical mirror part is the mirror body part. Machining pre-reserved process handles on both sides of the mirror body part. The process handles are provided with handle pin holes and handle through holes for easy installation. On the front of the mirror body part, a mounting plane, positioning pin holes and 7 clamping thread holes are machined for easy fixing. The back of the mirror body part is provided with a lightening groove and a relief bevel.

[0009] Step 2: Design a CNC milling fixture to fix the mirror body parts. The CNC milling fixture is equipped with a support inclined surface that matches the mounting plane. The back side of the mirror body parts is machined by a three-axis machine tool.

[0010] Step 3: Design a CNC lathe fixture to fix the mirror body parts. The CNC lathe fixture is equipped with a locating pin block that mates with the locating pin hole and a pull screw that mates with the clamping thread hole to complete the spherical machining of the mirror body parts.

[0011] Step 4: Remove the process handle from the part and install a split mounting bracket on the mirror body part. The split mounting bracket is installed on the part of the mirror body part where the process handle has been removed.

[0012] Furthermore, the mounting plane mentioned in step 1 protrudes 3mm overall to facilitate plane machining, the center line of the positioning pin hole is on the same axis as the center of the spherical surface on the front, and the clamping threaded holes are evenly distributed around the positioning pin hole.

[0013] Furthermore, in step 2, the bottom of the CNC milling fixture is provided with a φ230mm annular groove, the center of the CNC milling fixture is provided with a φ60mm first mounting hole, the side of the CNC milling fixture is provided with mutually perpendicular edges, the support inclined surface is provided with CNC milling pin holes and CNC milling thread holes corresponding to the positions of the shank pin holes and shank through holes, and the top of the CNC milling fixture is provided with a support plane.

[0014] Furthermore, step 2 includes the CNC milling process for the back of the mirror body part, which includes:

[0015] Step 2.1: Press the pressure plate to fix the CNC milling fixture in place by clamping the φ230mm annular groove at the bottom of the CNC milling fixture.

[0016] Step 2.2: Use a dial indicator to align the first φ60mm mounting hole on the top of the CNC milling fixture, determine the coordinate origin of the mirror body part, use a dial indicator to align the mutually perpendicular edges, determine the X and Z planes of the part coordinates, and thus determine the machining coordinate system.

[0017] Step 2.3: Clamp the mirror body part on the 135° support slope of the CNC milling fixture and complete the machining of the 45° bevel on the mirror body part; clamp the mirror body part on the 157.3° support slope and complete the machining of the 22.7° bevel on the mirror body part; clamp the mirror body part on the support plane set on the top of the CNC milling fixture and complete the machining of the remaining features on the back of the part.

[0018] Step 2.4: When machining the mounting surface of the mirror body part, the φ4 milling cutter enters from the outside and gradually mills inward with a zigzag toolpath. The rotation speed S = 1500 r / min, the feed F = 150 mm / min, and each layer is milled by 0.1 mm. Finally, the flatness and form and position tolerance of the mounting surface on the back of the part is less than 0.01 mm. The locating pin hole ensures the dimensional accuracy of φ12 mm (0, +0.01).

[0019] Furthermore, in step 3, the CNC lathe tooling is equipped with a faceplate component. The faceplate component has a positioning plane corresponding to the mounting plane position. The faceplate component is 142mm long. After the faceplate component is connected to the chuck, the distance between the faceplate component and the chuck is 80mm. The faceplate component is equipped with a positioning pin block with a diameter of 13.8mm. The total length of the faceplate component is 142mm. The center position of the faceplate component is equipped with a countersunk hole corresponding to the positioning pin hole position. The diameter of the countersunk hole is 14mm. The distance between the countersunk hole and the positioning pin block is 0.1mm.

[0020] Furthermore, the CNC turning process for the spherical surface of the mirror body part in step 3 is as follows:

[0021] Step 3.1: Screw the pin block through the positioning pin block into the flower plate component, adjust the position of the positioning pin block to the center of the flower plate component, and tighten the pin block screw to fix the positioning pin block to the flower plate component;

[0022] Step 3.2: Clamp the assembled flower disc component on the CNC lathe, flatten the end face of the tooling, and machine the locating pin block to ensure that the flatness of the end face of the tooling is less than 0.01mm and the diameter of the locating pin block is φ12mm (-0.01, 0).

[0023] Step 3.3: Clean the mounting surface on the back of the mirror body part and the end face of the faceplate component tooling. Insert the locating pin block into the locating pin hole on the back of the mirror body part. Tighten the seven pull screws through the faceplate component into the clamping threaded holes on the back of the mirror body part. Tighten each screw alternately and in turn, tightening them in diagonal groups. Clamp the mirror body part by pulling it back to make the mirror body part fit tightly against the mounting surface of the CNC lathe tooling.

[0024] Step 3.4: The spherical surface of the mirror body part is finally sized by removing excess material in four stages. First, rough machining is performed with a 1mm allowance, followed by annealing heat treatment. Then, semi-finish machining is performed with a 0.5mm allowance, followed by high and low temperature aging heat treatment. Next, the first finish machining is performed with a 0.2mm allowance. The curvature of the spherical surface is checked and the curvature deviation value is measured. Finally, the CNC program is adjusted to machine the spherical surface to the qualified size.

[0025] Furthermore, in step 3, the CNC turning process for the spherical surface of the mirror body part adopts the following machining parameters: the cutting tool is selected with a cutting edge radius of 0.4mm, a front angle of 5°, and a clearance angle of 50°. The CNC turning machining parameters are a feed rate of 0.03mm / rev, a depth of cut of 0.05mm, and a cutting speed of 60m / min.

[0026] Furthermore, in step 4, the split mounting bracket is provided with a combined machining surface and a second mounting hole, and the split mounting bracket is provided with a 0.5mm step.

[0027] Furthermore, the combined processing technology in step 4 includes:

[0028] Step 4.1: First cut the process handle of the part, leaving a 0.5mm allowance;

[0029] Step 4.2: Use a CNC milling fixture to clamp the part on a CNC milling machine using a three-jaw clamp. Remove the 0.5mm allowance remaining on the process shank of the part and make it flush with the side of the mirror body part. Drill the second threaded hole and the second pin hole on the side of the mirror body part to mate with the first threaded hole and the first pin hole set on the split mounting lug.

[0030] Step 4.3: Position the parts using pins and tighten the screws to assemble the split mounting lugs onto the lens body parts;

[0031] Step 4.4: Combine the machining surface of the split mounting lug with the second mounting hole to complete all machining processes of the part.

[0032] By adopting the above technical solution, the present invention can also bring the following beneficial effects:

[0033] 1. This invention reduces the interference of the separate mounting lugs on the spherical machining of the lens parts by processing the separate mounting lugs and leaving allowance for the separate mounting lugs, and then combining them for final machining. Moreover, the separate machining process also improves efficiency to a certain extent.

[0034] 2. This invention modifies the mirror body parts to facilitate machining. The front of the mirror body parts is machined with a mounting plane, locating pin holes, and clamping threaded holes for easy fixing. The back of the mirror body parts is provided with a light-reducing groove and a clearance bevel, which facilitates fixing with dedicated CNC milling fixtures and dedicated CNC turning fixtures. It also facilitates further CNC milling and CNC turning machining, which not only facilitates machining but also significantly improves machining accuracy. Attached Figure Description

[0035] To more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0036] Figure 1 This is a schematic diagram of the structure of the mirror body component in a specific embodiment of the present invention;

[0037] Figure 2 This is a schematic diagram showing the connection between the support plane and the first mounting hole in a specific embodiment of the present invention;

[0038] Figure 3 This is a schematic diagram showing the connection between the countersunk hole and the positioning plane in a specific embodiment of the present invention;

[0039] Figure 4 This is a schematic diagram showing the connection between the combined machining surface and the second mounting hole in a specific embodiment of the present invention;

[0040] The components include: 1. Mirror body parts; 2. Split mounting lugs; 3. Handle pin holes; 4. Handle through holes; 5. Part process handles; 6. Mounting planes; 7. Locating pin holes; 8. Clamping threaded holes; 9. Lightening grooves; 10. Leaving bevels; 11. Supporting planes; 12. Annular grooves; 13. First mounting holes; 14. Edges; 15. Supporting bevels; 16. Pattern plate components; 17. Locating pin blocks; 18. Pin block screws; 19. Reverse pull screws; 20. Locating planes; 21. Combined machined surfaces; 22. Second mounting holes; 23. Countersunk holes. Detailed Implementation

[0041] The embodiments of the present invention will now be described in detail with reference to the accompanying drawings.

[0042] The following specific examples illustrate the implementation of the present invention. Those skilled in the art can easily understand other advantages and effects of the present invention from the content disclosed in this specification. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of them. The present invention can also be implemented or applied through other different specific embodiments, and the details in this specification can also be modified or changed based on different viewpoints and applications without departing from the spirit of the present invention. It should be noted that, in the absence of conflict, the following embodiments and features in the embodiments can be combined with each other. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the scope of protection of the present invention.

[0043] It should be noted that various aspects of embodiments within the scope of the appended claims are described below. It will be apparent that the aspects described herein can be embodied in a wide variety of forms, and any particular structure and / or function described herein is merely illustrative. Based on this invention, those skilled in the art will understand that one aspect described herein can be implemented independently of any other aspect, and two or more of these aspects can be combined in various ways. For example, any number of aspects set forth herein can be used to implement the device and / or practice the method. Additionally, this device and / or method can be implemented using other structures and / or functionalities besides one or more of the aspects set forth herein.

[0044] It should also be noted that the illustrations provided in the following embodiments are only schematic representations of the basic concept of the present invention. The drawings only show the components related to the present invention and are not drawn according to the actual number, shape and size of the components in the actual implementation. In the actual implementation, the form, quantity and proportion of each component can be arbitrarily changed, and the layout of the components may also be more complex.

[0045] Furthermore, specific details are provided in the following description to facilitate a thorough understanding of the examples. However, those skilled in the art will understand that the described aspects can be practiced without these specific details.

[0046] In one embodiment of the present invention, the following detailed description is provided in conjunction with examples, such as... Figures 1 to 4 The method for processing a spherical reflector component includes:

[0047] Step 1, Structural manufacturability optimization: Modify the features of the mirror body part, design a machining process handle on the mirror body part to provide a clamping datum, and design corresponding features on mirror body part 1 as an alignment datum.

[0048] Step 2, Part tooling design: Design a CNC milling fixture to complete the machining of all features on the back of mirror part 1 on a three-axis machine tool; design a CNC lathe fixture to clamp and position the spherical surface for machining.

[0049] Step 3, CNC milling process for the back of mirror body part 1: The four-axis features are machined on a three-axis machine tool using a CNC milling fixture.

[0050] Step 4, CNC turning process route for spherical mirror part 1: forming a process route of rough machining - heat treatment - semi-finishing - heat treatment - finish machining 1 - inspection - finish machining 2, to ensure the curvature of the spherical surface of mirror part 1.

[0051] Step 5, Optimize spherical surface machining parameters: Optimize the machining parameters of the spherical surface to improve the machining pass rate of the spherical surface.

[0052] Step 6, assembly processing method: Remove the process handle 5 of the part, design the split mounting lug 2, leave the machining surface allowance, assemble the split mounting lug 2 on the mirror body part 1 and perform assembly processing.

[0053] The specific process of structural manufacturability optimization:

[0054] Before optimization, the front of the mirror body part 1 is a large area ratio spherical surface, the back is a flat surface, and the two sides are designed with separate mounting ears 2 to install and connect the reflector with other parts. It can meet the usage requirements, but the manufacturability is extremely poor.

[0055] 1) The large-area spherical surface on the front of mirror body part 1 needs to be formed by CNC turning. The position of the split mounting bracket 2 protrudes from the spherical surface, affecting CNC turning. Therefore, the split mounting bracket 2 is separated from mirror body part 1, and the two parts are machined separately. A allowance is left for the split mounting bracket 2, which is then assembled and machined together with mirror body part 1. A process handle 5 is designed at the position of the split mounting bracket 2, using a two-pin method for positioning, for machining the features on the back of mirror body part 1.

[0056] 2) The back of mirror body part 1 is designed with a mounting plane 6, locating pin holes 7, and clamping threaded holes 8 at 7 locations, providing a clamping and positioning surface for spherical turning. To ensure the flatness tolerance of the mounting plane 6, the mounting plane 6 protrudes 3mm as a whole to facilitate surface machining. The centerline of the locating pin hole 7 is on the same axis as the center of the spherical surface on the front of the mirror body part 1, ensuring positioning accuracy. The clamping threaded holes 8 are evenly distributed around the locating pin hole 7, which helps to reduce the clamping stress caused by clamping the mirror body part 1. A weight-reducing groove 9 and a clearance bevel 10 are designed at corresponding positions on the back to reduce weight and provide clearance.

[0057] Specific features of tooling design:

[0058] 1) The back of mirror body part 1 features a three-axis CNC milling fixture. The bottom of the CNC milling fixture is provided with a φ230mm annular groove 12 for easy clamping of the pressure plate. The center of the CNC milling fixture is provided with a φ60mm first mounting hole 13, and two mutually perpendicular edges 14 are provided on the side. According to the angle of the clearance edge on the back of mirror body part 1, 45° and 157.3° support slopes 15 are provided on the CNC milling fixture. According to the position of the shank pin hole 3 and shank through hole 4 on the process shank 5 of the part, the corresponding CNC milling pin hole and CNC milling thread hole are machined on the slope to ensure that the clearance edge of the mirror body part is perpendicular to the spindle after clamping. It can be milled by a three-axis machine tool.

[0059] 2) Spherical CNC lathe fixture for the part: The positioning plane 20 and countersunk hole 23 of the faceplate component 16 are designed according to the position of the mounting plane 6 on the back of the reflector part and the clamping threaded hole 8. The faceplate is 142mm long. After the faceplate is connected to the chuck, there is an 80mm gap between the two parts to facilitate tightening the screws. Positioning is achieved by positioning pin 17 with a diameter of φ13.8mm. The center of the faceplate component 16 is provided with countersunk hole 23. The distance between countersunk hole 23 and positioning pin 17 is 0.1mm.

[0060] CNC milling process route for the back of the part:

[0061] 1) Press the φ230mm annular groove 12 at the bottom of the CNC milling fixture to fix the CNC milling fixture.

[0062] 2) Use a dial indicator to align the first mounting hole 13 at the top of the fixture to determine the coordinate origin of the mirror body part 1. Use a dial indicator to align the mutually perpendicular edges 14 to determine the X and Z planes of the part coordinates, thereby determining the machining coordinate system.

[0063] 3) Clamp the mirror body part 1 on the 135° support slope 15 of the CNC milling fixture to complete the machining of the 45° inclined edge on the mirror body part 1; clamp the mirror body part 1 on the 157.3° support slope 15 to complete the machining of the 22.7° inclined edge on the mirror body part 1; clamp the mirror body part 1 on the support plane 11 set on the top of the CNC milling fixture to complete the machining of the remaining features on the back of the part.

[0064] 4) When machining the mounting plane 6 of mirror body part 1, the φ4 milling cutter enters from the outside and gradually mills inward with a zigzag tool path, with a speed S = 1500 r / min and a feed F = 150 mm / min. Each layer is milled by 0.1 mm. Finally, the flatness and form and position tolerance of the mounting plane 6 on the back of the part is less than 0.01 mm. The locating pin hole 7 ensures the dimensional accuracy of φ12 mm (0, +0.01).

[0065] The advantages of the process route mainly include: fully considering the clamping and alignment methods of mirror body part 1; designing the annular groove 12 to make the clamping position selection of CNC milling fixture more flexible; designing the first mounting hole 13 at the top and the mutually perpendicular edges 14 to make the alignment of the origin more convenient; using the supporting inclined plane 15 to change the angle of the part; using a three-axis machine tool to complete the machining content of a five-axis machine tool, releasing the capacity of the five-axis machine tool.

[0066] CNC turning process route for spherical parts:

[0067] 1) The pin screw 18 passes through the positioning pin 17 and is screwed into the flower plate component 16. Adjust the position of the positioning pin 17 to the center of the flower plate component 16, and tighten the pin screw 18 to fix the positioning pin 17 to the flower plate component 16.

[0068] 2) Mount the assembled flower plate component 16 on a CNC lathe, flatten the end face of the tooling, and machine the positioning pin block 17 to ensure that the flatness of the end face of the tooling is less than 0.01mm and the diameter of the positioning pin block 17 is φ12mm (-0.01, 0).

[0069] 3) Clean the mounting plane 6 on the back of mirror body part 1 and the tooling end face of the face plate component 16. Insert the positioning pin block 17 into the positioning pin hole 7 on the back of mirror body part 1. Screw the 7 pull screws 19 through the face plate component 16 into the clamping thread hole 8 on the back of mirror body part 1. Tighten each screw alternately and in turn, tightening them in diagonal groups. Clamp the mirror body part 1 by pulling it back, so that the mirror body part 1 is in close contact with the mounting surface of the CNC lathe tooling.

[0070] 4) The spherical surface of mirror body part 1 is finally sized by removing excess material in four stages. First, rough machining is performed with a 1mm allowance, followed by annealing heat treatment. Then, semi-finish machining is performed with a 0.5mm allowance, followed by high and low temperature aging heat treatment. Next, the first finish machining is performed with a 0.2mm allowance. The curvature of the spherical surface is detected and the curvature deviation value is measured. Finally, the CNC program is adjusted to machine the spherical surface to the qualified size.

[0071] The advantages of this process route mainly include: before processing each batch of mirror body parts 1, the face plate component 16 and the locating pin block 17 are machined on the machine tool, strictly ensuring that the center of the locating pin block 17 coincides with the center of the spindle, and strictly ensuring that the locating plane 20 of the face plate is perpendicular to the spindle, eliminating the need for tooling alignment; the face plate component 16 and the locating pin block 17 are separate, and only a new locating pin block 17 needs to be replaced after each batch is processed, and the face plate component 16 can be reused multiple times. The face plate component 16 is assembled by screw clamping, which is simple and easy to operate; the flatness of the tooling end face and the diameter tolerance of the pin block are strictly guaranteed, the clamping and positioning are more accurate, and the clamping deformation of mirror body parts 1 is smaller; the parts are machined to size using a four-stage allowance removal method, and the program is adjusted based on the inspection results to ensure the pass rate of the parts.

[0072] Optimization of spherical machining parameters:

[0073] The optimal spherical surface machining parameters were obtained through simulation and machining verification. The selected tool had a cutting edge radius of 0.4 mm, a rake angle of 5°, and a clearance angle of 50°. The machining parameters for spherical surface finishing were a feed rate of 0.03 mm / rev, a depth of cut of 0.05 mm, and a cutting speed of 60 m / min.

[0074] Assembly and combination processing of split mounting lug 2:

[0075] The combined machining surface 21 of the split mounting bracket 2 and the second mounting hole 22 have a 0.2mm allowance. After assembly, the parts are machined to the required dimensions. A 0.5mm step is set on the split mounting bracket 2 to create a 0.5mm gap between the split mounting bracket 2 and the parts, which does not affect the subsequent spherical optical machining.

[0076] 1) First cut the process handle 5 of the part, leaving a 0.5mm allowance;

[0077] 2) Use a CNC milling fixture for clamping. Clamp the part on a CNC milling machine with a three-jaw chuck. Remove the 0.5mm allowance remaining on the process shank 5 of the part and make it flush with the side of the mirror body part 1. Drill the second threaded hole and the second pin hole on the side of the mirror body part 1, and make them fit with the first threaded hole and the first pin hole set on the split mounting lug 2.

[0078] 3) Position the split mounting bracket 2 onto the mirror body part 1 by using pins and tightening screws;

[0079] 4) Combine the machining surface 21 of the split mounting lug 2 with the second mounting hole 22 to complete all machining processes of the mirror body part 1.

[0080] In summary, this invention eliminates the influence of the separate mounting bracket 2 on the spherical machining of the mirror body part 1 by processing the separate mounting bracket 2 and the mirror body part 1 separately. Furthermore, it provides dedicated CNC milling and CNC turning fixtures for the separate mounting bracket 2 and the mirror body part 1, which facilitates the clamping and fixing of the separate mounting bracket 2 and the mirror body part 1, improves processing efficiency, further optimizes the processing technology, and improves processing accuracy. It has the advantages of convenient fixing of processed parts, high processing efficiency, and high surface curvature machining accuracy of spherical reflector parts.

[0081] The above description is merely a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in the present invention should be included within the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be determined by the scope of the claims.

Claims

1. A method for processing the structure of a spherical reflector component, characterized in that, Includes the following steps: Step 1: Machining the main body of the part. First, the main body of the spherical mirror part is the mirror body part (1). The pre-reserved part process handle (5) is machined on both sides of the mirror body part (1). The part process handle (5) is provided with handle pin holes (3) and handle through holes (4) for easy installation. The back of the mirror body part (1) is provided with mounting plane (6), positioning pin holes (7) and 7 clamping threaded holes (8). The back of the mirror body part (1) is provided with lightening groove (9) and relief bevel (10). Step 2: Design a CNC milling fixture to fix the mirror body part (1). The CNC milling fixture is equipped with a support inclined surface (15) and a support plane (11) that are compatible with the mirror body part. The back side of the mirror body part (1) is processed by a three-axis machine tool. Step 3: Design a CNC lathe fixture to fix the mirror body part (1). The CNC lathe fixture is equipped with a positioning pin block (17) that mates with the positioning pin hole (7) and a pull screw (19) that mates with the clamping thread hole (8) to complete the spherical machining of the mirror body part (1). Step 4: Remove the process handle (5) of the part and install a split mounting bracket (2) on the mirror body part (1). The split mounting bracket is installed on the mirror body part (1) at the position where the process handle (5) of the part has been removed.

2. The processing method for a spherical reflector component structure according to claim 1, characterized in that: In step 1, the mounting plane (6) protrudes 3mm, the center line of the positioning pin hole (7) and the center of the spherical surface on the front of the mirror body part (1) are on the same axis, and the clamping threaded holes (8) are evenly distributed around the positioning pin hole (7).

3. The processing method for a spherical reflector component structure according to claim 2, characterized in that: The bottom of the CNC milling fixture in step 2 is provided with a φ230mm annular groove (12), the center of the CNC milling fixture is provided with a φ60mm first mounting hole (13), the side of the CNC milling fixture is provided with mutually perpendicular edges (14), the support inclined surface (15) is provided with CNC milling pin holes and CNC milling thread holes corresponding to the positions of the shank pin hole (3) and the shank through hole (4), and the top of the CNC milling fixture is provided with a support plane (11).

4. The processing method for a spherical reflector component structure according to claim 3, characterized in that, Step 2, the CNC milling process for the back of the mirror body part (1) includes: Step 2.1: Press the pressure plate against the φ230mm annular groove (12) at the bottom of the CNC milling fixture to fix the CNC milling fixture; Step 2.2: Use a dial indicator to align the φ60mm first mounting hole (13) on the top of the CNC milling fixture, determine the coordinate origin of the mirror body part (1), use a dial indicator to align the mutually perpendicular edges (14), determine the X plane and Z plane of the coordinates of the mirror body part (1), and thus determine the machining coordinate system; Step 2.3: Clamp the mirror body part (1) on the 135° support slope (15) of the CNC milling fixture to complete the machining of the 45° inclined edge on the mirror body part (1); clamp the mirror body part (1) on the 157.3° support slope (15) to complete the machining of the 22.7° inclined edge on the mirror body part (1); clamp the mirror body part (1) on the support plane (11) set on the top of the CNC milling fixture to complete the machining of the remaining features on the back of the part; Step 2.4: Machining the mounting plane (6) of the mirror body part (1) is performed. A φ4 milling cutter is used to mill from the outside to the inside with a zigzag tool path. The rotation speed S=1500r / min, the feed F=150mm / min, and each layer is milled by 0.1mm. Finally, the flatness and form and position tolerance of the mounting plane (6) on the back of the part is less than 0.01mm. The positioning pin hole (7) ensures the dimensional accuracy of φ12mm (0, +0.01).

5. The processing method for a spherical reflector component structure according to claim 1, characterized in that, In step 3, the CNC lathe tooling is equipped with a faceplate component (16). The faceplate component (16) has a positioning plane (20) corresponding to the position of the mounting plane (6). The faceplate component (16) is 142mm long. After the faceplate component (16) is connected to the chuck, there is an 80mm gap between the faceplate component (16) and the chuck. The faceplate component (16) is equipped with a positioning pin block (17). The diameter of the positioning pin block (17) is 13.8mm. The center position of the faceplate component (16) is equipped with a countersunk hole (23) corresponding to the position of the positioning pin hole (7). The diameter of the countersunk hole (23) is 14mm. The radial distance between the countersunk hole (23) and the positioning pin block (17) is 0.1mm.

6. The processing method for a spherical reflector component structure according to claim 1, characterized in that, The CNC turning process for the spherical surface of mirror body part (1) in step 3 is as follows: Step 3.1: Screw the pin block screw (18) through the positioning pin block (17) into the flower plate component (16), adjust the position of the positioning pin block (17) to the center of the flower plate component (16), and tighten the pin block screw (18) to fix the positioning pin block (17) and the flower plate component (16); Step 3.2: Clamp the assembled flower plate component (16) on the CNC lathe, flatten the end face of the tooling, and machine the positioning pin block (17) to ensure that the flatness of the end face of the tooling is less than 0.01mm. The diameter of the positioning pin block (17) is φ12mm (-0.01, 0). Step 3.3: Clean the mounting plane (6) on the back of the mirror body part (1) and the tooling end face of the face plate component (16). Insert the positioning pin block (17) into the positioning pin hole (7) on the back of the mirror body part (1). Screw the seven pull screws (19) through the face plate component (16) into the clamping threaded hole (8) on the back of the mirror body part (1). Tighten each screw alternately and in turn, tightening them in diagonal groups. Clamp the mirror body part (1) by pulling it back, so that the mirror body part (1) fits tightly with the mounting surface of the CNC lathe tooling. Step 3.4: The spherical surface of the mirror body part (1) is processed to the final size by removing the excess material four times. First, rough machining is performed with a 1mm allowance, followed by annealing heat treatment. Then, semi-finish machining is performed with a 0.5mm allowance, followed by high and low temperature aging heat treatment. Next, the first finishing machining is performed with a 0.2mm allowance. The curvature of the spherical surface is detected, the curvature deviation value is measured, and finally, the CNC program is adjusted to process the spherical surface to the qualified size.

7. A method for processing a spherical reflector component structure according to claim 6, characterized in that, In step 3, the CNC turning process for the spherical surface of the mirror body part (1) uses the following machining parameters: the cutting tool is selected with a cutting edge radius of 0.4mm, a front angle of 5°, and a back angle of 50°. The CNC turning machining parameters are feed of 0.03mm / rev, depth of cut of 0.05mm, and cutting speed of 60m / min.

8. A method for processing a spherical reflector component structure according to claim 7, characterized in that: The split mounting bracket (2) in step 4 is provided with a combined machining surface (21) and a second mounting hole (22), and the split mounting bracket (2) is provided with a 0.5mm step.

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