A deterministic shaping method for large and complex surfaces based on adaptive surface matching

Abstract

This invention discloses a deterministic shaping device and method for large and complex surfaces based on adaptive surface matching. The device includes a rotary drive assembly, a revolution-rotation transmission housing, and a shaping disk assembly, mounted from top to bottom. The revolution-rotation transmission housing contains a revolution shaft and a rotation shaft. The shaping disk assembly includes a tool disk and a shaping film mounted on the lower side of the tool disk. The output shaft of the rotary drive assembly is connected to the revolution shaft, and the rotation shaft is connected to the eccentric side of the tool disk. The revolution-rotation transmission housing contains a pressure component that applies pressure to the tool disk via the rotation shaft. This invention's deterministic shaping device for large and complex surfaces based on adaptive surface matching has a simple structure and can be easily installed as a modular unit on a CNC machine tool. It achieves shaping of large and complex surfaces through machine tool servo motion, offering good operational flexibility and spatial accessibility.

Description

Technical Field

[0001] This invention relates to the field of microwave antenna technology, and specifically to a deterministic shaping device and method for large complex surfaces based on adaptive surface matching. Background Technology

[0002] Large carbon fiber composite antenna reflectors require high-precision molds for molding and manufacturing. Large compact field antenna subsystems require high-precision reflectors for electromagnetic wave transmission. The mold forming surface and the surface of the compact field reflector are mostly quadratic surfaces with different radii of curvature at each point, gradually changing from the center to the edge. During grinding and polishing, it is not easy to achieve a tight fit with the tool disk, resulting in uneven shaping pressure and affecting processing stability. Furthermore, the normals at each point of the quadratic surface converge at different positions, making it impossible to use a counter-grinding method to improve accuracy.

[0003] Carbon fiber composite antenna reflectors are used in aerospace, information, and other fields, offering advantages such as wide coverage, no need for base construction, and convenience and flexibility. Increasing the antenna reflector aperture can improve detection resolution and sensitivity, while increasing the operating frequency can enhance communication or detection capabilities in complex electromagnetic environments. However, increasing the antenna reflector aperture and operating frequency requires larger mold forming surfaces and higher precision.

[0004] In the machining of large antenna molds and compact field reflectors, the large cutting area and long machining cycle, coupled with machine tool errors, cutting tool errors, clamping errors, stress and thermal deformation errors of the process system, and measurement errors, make it difficult to meet the surface accuracy requirements for high-frequency operation. Furthermore, the irregular error distribution makes it unsuitable for compensation machining using precision machine tools. Therefore, it is necessary to improve surface accuracy through grinding and polishing based on the magnitude and distribution characteristics of the errors.

[0005] In the polishing process of large and complex surface workpieces, the tool disk needs to traverse the entire error surface, and its size and shape will affect the removal of surface material. If the tool disk is smaller, it will help to achieve close contact on surfaces with varying curvature and improve the control of low-frequency errors. However, if the tool disk is too small, the contact area and relative speed will be reduced, the effectiveness of the abrasive and the processing efficiency will be reduced, resulting in a longer shaping cycle and the generation of medium- and high-frequency errors.

[0006] As the tool disk size increases, the contact state between the tool disk and the large, complex surface workpiece will change with the machining position, limiting the adaptability to the workpiece surface. If the surface shapes of the two do not match in the contact area, it will affect the stability of the removal function and the ability to remove local errors. Summary of the Invention

[0007] The technical problem to be solved by the present invention is to overcome the shortcomings of the existing technology and provide a deterministic shaping device and method for large and complex surfaces based on adaptive matching of surfaces.

[0008] To address the aforementioned technical problems, this invention discloses a deterministic shaping device for large, complex surfaces based on adaptive matching, comprising a rotary drive assembly, a revolution-rotation transmission housing, and a shaping disk assembly mounted from top to bottom. The revolution-rotation transmission housing contains a revolution shaft and a rotation shaft. The shaping disk assembly includes a tool disk and a shaping film mounted on the lower side of the tool disk. The output shaft of the rotary drive assembly is connected to the revolution shaft, and the rotation shaft is connected to the eccentric side of the tool disk. The revolution-rotation transmission housing contains a rotation shaft pressurizing component that applies pressure to the tool disk via the rotation shaft.

[0009] Furthermore, the rotary drive assembly includes a motor and a connecting seat that can be fixed to the machine tool's motion axis. The motor is mounted on the connecting seat, and the output shaft of the motor is coaxially connected to the revolution axis.

[0010] Furthermore, the revolution and rotation transmission housing is also equipped with a revolution driven wheel, a revolution driving wheel, a rotation driven wheel, and a rotation driving wheel. The revolution driving wheel and the rotation driving wheel are mounted on the revolution shaft. The revolution driven wheel is fixed to the inner wall of the revolution and rotation transmission housing and is driven by the revolution driving wheel. The rotation driven wheel is mounted on the rotation shaft and is driven by the rotation driving wheel. The shaping disc assembly is connected to the rotation shaft via a flexible hinge.

[0011] Furthermore, the revolution driven pulley, revolution driving pulley, rotation driven pulley, and rotation driving pulley are all synchronous belt pulleys driven by synchronous belts.

[0012] Furthermore, the pressure component of the rotating shaft includes a pressure spring, a preload screw, and a locking nut. One end of the pressure spring abuts against the upper end of the rotating shaft, and the other end abuts against the preload screw. The preload screw extends outside the revolution-rotation transmission box and is locked by the locking nut.

[0013] Furthermore, the shaping membrane includes a circumferentially segmented polyurethane membrane and a central polyurethane membrane. The circumferentially segmented polyurethane membrane is arranged circumferentially outside the central polyurethane membrane, and inter-membrane grooves are provided between the circumferentially segmented polyurethane membranes. The sides of adjacent circumferentially segmented polyurethane membranes are involutes.

[0014] Furthermore, a counterweight is provided on the upper side of the tool disk, and the counterweight is installed on one side of the rotation shaft.

[0015] Then, this invention discloses a deterministic shaping method for large and complex surfaces based on adaptive surface matching, wherein the tool disk satisfies the following force and torque balance conditions during the shaping process:

[0016] ;

[0017] in, F 0 represents the pressure exerted by the spring on the tool disc. F 1. β 1 represents the supporting force exerted by the workpiece with a large and complex surface on point A at the left end of the tool disk, and the angle between the supporting force and the normal to that point. F 2. β 2 represents the supporting force exerted by the workpiece on point B at the right end of the tool disk, and the angle between the supporting force and the normal to that point, respectively. r The radius of the tool disk, e This is the eccentricity between the tool disk's rotation axis and its revolution axis. M 0 represents the bending moment exerted on the tool disk by the flexible hinge;

[0018] β 1. β 2. Satisfies:

[0019] , ;

[0020] in, R A , R B Let A and B be the radii of curvature at points A and B on the workpiece surface, respectively.

[0021] Furthermore, when the surface of the workpiece is a parabolic surface, the tool disk satisfies a first adaptive matching criterion and a second adaptive matching criterion. The first adaptive matching criterion is: The second adaptive matching criterion is: The ω 0 represents the rotational angular velocity of the tool disk during the shaping process. ρ For the density of the tool disk, t For the thickness of the tool disk, E This is the elastic modulus of the tool disk.

[0022] Compared with the prior art, the advantages of the present invention are as follows:

[0023] 1) The large complex surface deterministic shaping device based on adaptive matching of the present invention has a simple structure and can be easily installed on CNC machine tools as a modular unit. It realizes the shaping of large complex surfaces through machine tool servo motion and has good operational flexibility and spatial accessibility.

[0024] 2) The deterministic shaping device of the present invention can drive the tool disk to achieve continuous revolution and rotation. By changing the revolution synchronous pulley and the rotation synchronous pulley, the speed ratio of revolution and rotation can be changed. The removal function is close to Gaussian type, and the shaping control is simple and reliable.

[0025] 3) The deterministic shaping device of the present invention will not produce wire or tube entanglement during revolution and rotation; and it does not use slip rings, making maintenance simple;

[0026] 4) The deterministic shaping device of the present invention can continuously load the polishing zone with uniform and adjustable pressure; and can automatically compensate for the height difference between the tool disk and the polishing zone, thus removing the stability and adaptability of the function.

[0027] 5) This invention provides two adaptive matching criteria for the tool disk of the deterministic shaping device, ensuring that the tool disk achieves close contact with the workpiece surface under polishing pressure and responds in real time to the surface changes of the processing area during the shaping process;

[0028] 6) The tool disk of the deterministic shaping device of the present invention is covered with a circumferentially segmented polyurethane film with an involute edge, which can ensure that the film surface is smooth and wrinkle-free, and also make the movement trajectory of the abrasive grains in the groove between the films smooth relative to the polishing area during the shaping process, without scratching the workpiece surface. Attached Figure Description

[0029] The accompanying drawings, which constitute a part of this application, are used to provide a further understanding of the invention. The illustrative embodiments of the invention and their descriptions are used to explain the invention and do not constitute an improper limitation of the invention. In the drawings:

[0030] Figure 1 This is a schematic diagram of the composition structure of the deterministic shaping device disclosed in a preferred embodiment of the present invention;

[0031] Figure 2 This is a schematic diagram of the segmented form of the polyurethane film on the surface of the tool disk of the deterministic shaping device disclosed in a preferred embodiment of the present invention;

[0032] Figure 3 This is a schematic diagram illustrating the function of the deterministic shaping device tool disk disclosed in a preferred embodiment of the present invention on a large, complex surface workpiece.

[0033] Figure 4 This is a schematic diagram of the force state of the deterministic shaping device tool disk on a large, complex surface workpiece, as disclosed in a preferred embodiment of the present invention.

[0034] Legend:

[0035] 1. Shaping membrane; 101. Circumferentially segmented polyurethane membrane; 102. Central polyurethane membrane; 103. Inter-membrane groove; 2. Tool disc; 3. Revolution and rotation transmission housing; 4. Revolution synchronous belt; 5. Drive shaft lock nut; 6. Revolution driven wheel; 7. Deep groove ball bearing; 8. Revolution shaft; 9. Motor; 10. Connecting seat; 11. Coupling; 12. Lock nut; 13. Preload screw; 14. Pressure spring; 15. Thrust ball bearing; 16. Rotation synchronous belt; 17. Cylindrical roller bearing; 18. Rotation shaft; 19. Flexible hinge; 20. Counterweight; 21. Workpiece; 22. Revolution drive wheel; 23. Rotation drive wheel; 24. Rotation driven wheel. Detailed Implementation

[0036] To facilitate understanding of the present invention, the present invention will be described more fully and in detail below with reference to the accompanying drawings and preferred embodiments, but the scope of protection of the present invention is not limited to the following specific embodiments.

[0037] like Figure 1-4 As shown, this embodiment of the invention first discloses a deterministic shaping device for large complex surfaces based on adaptive matching of surfaces, including a rotary drive assembly, a revolution and rotation transmission housing 3, and a shaping disk assembly installed from top to bottom. The revolution and rotation transmission housing 3 is provided with a revolution shaft 8 and a rotation shaft 18. The shaping disk assembly includes a tool disk 2 and a shaping film 1 installed on the lower side of the tool disk 2. The output shaft of the rotary drive assembly is connected to the revolution shaft 8, and the rotation shaft 18 is connected to the eccentric side of the tool disk 2. The revolution and rotation transmission housing 3 is provided with a rotation shaft pressurizing component that applies pressure to the tool disk 2 through the rotation shaft 18. The rotation shaft pressurizing component includes a pressure spring 14, a preload screw 13, and a locking nut 12. One end of the pressure spring 14 abuts against the upper end of the rotation shaft 18, and the other end abuts against the preload screw 13. The preload screw 13 extends outside the revolution and rotation transmission housing 3 and is locked by the locking nut 12. A thrust ball bearing 15 is mounted on the upper end of the spin shaft 18. A pressure spring 14 acts on the upper surface of the thrust ball bearing 15. The spring force is transmitted to the tool disk 2 after passing through the thrust ball bearing 15, the spin shaft 18, and the flexible hinge 19, providing pressure for the shaping process. Furthermore, the revolution-rotation transmission housing 3 and the spin shaft 18 achieve relative rotation through a cylindrical roller bearing 17. The outer ring of the cylindrical roller bearing 17 has no flange, and its inner and outer rings can move axially relative to each other. This ensures that the pressure spring 14 can move axially relative to the housing of the revolution-rotation transmission housing 3 and the spin shaft 18 during the loading process, compensating for the distance error between the tool disk 2 and the workpiece 21 with a large and complex surface during the shaping process.

[0038] In this embodiment, the rotary drive assembly includes a motor 9 and a connecting seat 10 that can be fixed to the machine tool's motion axis (specifically, the end of the machine tool's motion axis, the position where the tool is mounted). The machine tool provides servo motion for the deterministic shaping device, enabling shaping processing at different positions on the workpiece 21 with a large and complex surface. The motor 9 is mounted on the upper side of the connecting seat 10, and the output shaft of the motor 9 is coaxially connected to the revolution shaft 8 via a coupling 11. Simultaneously, the housing of the revolution-rotation transmission box 3 and the revolution shaft 8 achieve relative rotation through upper and lower deep groove ball bearings 7. The transmission shaft locking nut 5 provides axial limiting and preload to the deep groove ball bearings 7 on the revolution shaft 8.

[0039] In this embodiment, the revolution-rotation transmission housing 3 is also equipped with a revolution driven wheel 6, a revolution driving wheel 22, a rotation driven wheel 24, and a rotation driving wheel 23. The revolution driving wheel 22 and the rotation driving wheel 23 are mounted on the revolution shaft 8. The revolution driven wheel 6 is fixed to the inner wall of the revolution-rotation transmission housing 3 and is connected to the revolution driving wheel 22. The rotation driven wheel 24 is mounted on the rotation shaft 18 and is connected to the rotation driving wheel 23. The shaping disk assembly is connected to the rotation shaft 18 through a flexible hinge 19. The flexible hinge 19 has high axial stiffness and torsional stiffness and low deflection stiffness, and can deflect in a direction perpendicular to the axis during the shaping process of the workpiece 21 with a large and complex surface.

[0040] In this embodiment, the orbital driven wheel 6, the orbital driving wheel 22, the self-rotating driven wheel 24, and the self-rotating driving wheel 23 are all synchronous belt pulleys driven by synchronous belts. Specifically, the orbital driven wheel 6 and the orbital driving wheel 22 are driven by the orbital synchronous belt 4, while the self-rotating driven wheel 24 and the self-rotating driving wheel 23 are driven by the self-rotating synchronous belt 16.

[0041] In this embodiment, the shaping film 1 includes a circumferentially segmented polyurethane film 101 and a central polyurethane film 102. The circumferentially segmented polyurethane film 101 is arranged circumferentially outside the central polyurethane film 102. The circumferentially segmented polyurethane film 101 can avoid wrinkles on the surface of the tool disk 2 and ensure a smooth film surface. Furthermore, inter-film grooves 103 are provided between the circumferentially segmented polyurethane films 101. The abrasive particles scattered during the shaping process are contained in the inter-film grooves 103. The sides of adjacent circumferentially segmented polyurethane films 101 are involutes. The relative movement of the abrasive particles in the inter-film grooves 103 with the surface of the workpiece 21 during shaping is similar to the movement of a gear rack, with a smooth trajectory and no scratches on the surface of the workpiece 21.

[0042] In this embodiment, a counterweight 20 is provided on the upper side of the tool disk 2. The counterweight 20 is installed on one side of the rotation axis. Through structural optimization design and the mass ratio of the counterweight 20, the center of mass of the tool disk 2's rotation is located on the axis of the rotation axis 18, so that centrifugal force will not be generated due to the rotation.

[0043] Then, this invention discloses a deterministic shaping method for large and complex surfaces based on adaptive surface matching, wherein the tool disk 2 satisfies the following force and moment balance conditions during the shaping process:

[0044] ;

[0045] in, F 0 represents the pressure exerted by the compression spring 14 on the tool disk 2 via the thrust ball bearing 15, the rotation shaft 18, and the flexible hinge 19. F 1. β 1 represents the supporting force exerted by the workpiece 21 with a large and complex surface on point A at the left end of the tool disk 2, and the angle between the supporting force and the normal at that point. F 2. β 2 represents the supporting force exerted by the workpiece 21 with a large and complex surface on point B at the right end of the tool disk 2, and the angle between the supporting force and the normal to that point. r The radius of tool disk 2, e This refers to the eccentricity between the rotation axis and the revolution axis of tool disk 2. M 0 represents the bending moment exerted on the tool disk 2 by the flexible hinge 19.

[0046] β 1. β 2. Satisfies:

[0047] , ;

[0048] in, R A , R B These are the radii of curvature at points A and B on the surface of workpiece 21, respectively.

[0049] In this embodiment, the surface of workpiece 21 is a parabolic surface, satisfying the following:

[0050] ;

[0051] The calculation yields:

[0052] ;

[0053] according to Figure 4 Establish coordinate system Oxyz Tool disk 2 in z The bending deformation in the direction satisfies the equation:

[0054] ;

[0055] in, E The elastic modulus of tool disk 2, I Let be the moment of inertia of tool disk 2.

[0056] Tool disk 2 upper section x The moment of inertia at point is:

[0057] ;

[0058] in, t The thickness of tool disk 2.

[0059] Tool disk 2 in z The deformation in the direction is:

[0060] ;

[0061] The maximum deformation of tool disk 2 occurred x At position =0, facing downwards, the value is:

[0062] ;

[0063] The shaping process requires the tool disk 2 and the workpiece 21 to fit tightly together in the contact area. This tight fit can only be guaranteed when the deformation of the tool disk 2 under polishing pressure exceeds the sagittal height of the contact area of ​​the workpiece 21. The corresponding condition is:

[0064] z max ≥ δ 0;

[0065] in, δ 0 represents the sagitta of workpiece 21 in the contact area.

[0066] In this embodiment, the matching formula is taken as z max ≥ 1.2 δ 0, the corresponding first adaptive matching criterion is:

[0067] ;

[0068] The natural frequency of tool disk 2 is:

[0069] ;

[0070] in, ρ The density of tool disk 2.

[0071] The tool disk 2 rotates during the shaping process. Each rotation results in two elevation changes on the mating surface of the workpiece 21, which has a large and complex parabolic surface. Therefore, the corresponding second adaptive matching criterion is:

[0072] ;

[0073] in, ω0 represents the rotational angular velocity of tool disk 2 during the shaping process.

[0074] In this embodiment, the radius of the tool disk r =60mm, eccentricity e =20mm, F 0 = 200N, thickness of stainless steel tool tray t =3mm, elastic modulus E =200 GPa. The equation of the radial section of the parabola is: x 2 =4 pz ,focal length p =8000mm, the radius of curvature at different positions is:

[0075] ;

[0076] The radius of curvature of workpiece 21 with a large parabolic surface is from the center ( x =0) gradually increases towards the edge, and the radius of curvature at the center position is... R 0 = 16000mm is the minimum; therefore, the alignment difficulty is greatest when the tool disk 2 is positioned at the center of the workpiece 21, and the corresponding contact area sag is:

[0077] =0.1125mm;

[0078] because:

[0079] ;

[0080] The adaptive matching criterion 1 is satisfied, that is, the tool disk 2 can achieve close contact with the workpiece 21 under the action of polishing pressure.

[0081] In this embodiment, the rotational speed of the tool disk 2 is 300 r / min, corresponding to an angular velocity of 31.4 rad / s. Because:

[0082] ;

[0083] The adaptive matching criterion 2 is satisfied, meaning that the tool disk 2 can respond in real time to the surface changes of the workpiece 21 when it rotates at this speed.

[0084] The processing flow for deterministic shaping of a workpiece 21 with a large parabolic surface and a focal length of 8000mm using the device of this invention is as follows: The tool disk 2 is made of stainless steel with a thickness of 3mm and a radius of 60mm. The axial distance between the revolution axis 8 and the rotation axis 18 is 20mm. The polishing pressure applied to the workpiece 21 by the pressure spring 14 is 200N, and the rotation speed of the tool disk 2 is 300r / min. According to adaptive matching criteria 1 and 2, the tool disk 2 can achieve close and real-time contact with the workpiece 21 during the polishing and shaping process. A circumferentially segmented polyurethane film 101 with an involute edge is pasted on the surface of the tool disk 2 to make the movement trajectory of the abrasive grains smooth and not scratch the processing surface during the shaping process. The shaping device is installed on a CNC machine tool to accurately position the tool disk 2 and the workpiece 21, and polishing and shaping are performed in a set motion mode. By controlling the dwell time in each area, excess material on the surface of the workpiece 21 is precisely controlled to correct errors and improve surface accuracy. This invention can be used in the deterministic shaping and machining of workpieces 21 with large and complex surfaces, such as large antenna molds and compacted field reflectors.

[0085] While the present invention has been disclosed above with reference to preferred embodiments, it is not intended to limit the invention. Any person skilled in the art can make many possible variations and modifications to the technical solutions of the present invention, or modify them into equivalent embodiments, without departing from the scope of the present invention. Therefore, any simple modifications, equivalent changes, and modifications made to the above embodiments based on the technical essence of the present invention, without departing from the scope of the present invention, should fall within the protection scope of the present invention.

Claims

1. A deterministic shaping method for large, complex surfaces based on adaptive surface matching, characterized in that, A large-scale, complex surface deterministic shaping device is adopted. The device includes a rotary drive assembly, a revolution and rotation transmission housing (3), and a shaping disk assembly installed from top to bottom. The revolution and rotation transmission housing (3) is provided with a revolution shaft (8) and a rotation shaft (18). The shaping disk assembly includes a tool disk (2) and a shaping film (1) installed on the lower side of the tool disk (2). The output shaft of the rotary drive assembly is connected to the revolution shaft (8), and the rotation shaft (18) is connected to the eccentric side of the tool disk (2). The revolution and rotation transmission housing (3) is provided with a revolution shaft (8) and a rotation shaft (18). A rotating shaft pressurizing component is provided to pressurize the tool disk (2) through the rotating shaft (18); the rotating shaft pressurizing component includes a pressure spring (14), a preload screw (13) and a locking nut (12), one end of the pressure spring (14) abuts against the upper end of the rotating shaft (18), and the other end abuts against the preload screw (13), the preload screw (13) extends outside the revolution-rotation transmission housing (3) and is locked by the locking nut (12); the shaping disk assembly is connected to the rotating shaft (18) through a flexible hinge (19); The tool disk (2) satisfies the following force and torque balance conditions during the shaping process: ； in, F 0 represents the pressure exerted by the compression spring (14) on the tool disk (2). F 1. β 1 represents the supporting force of the workpiece (21) with a large and complex surface on point A at the left end of the tool disk (2), and the angle between the supporting force and the normal of that point. F 2. β 2 represents the supporting force of the workpiece (21) on point B at the right end of the tool disk (2), and the angle between the supporting force and the normal of that point, respectively. r The radius of the tool disk (2) is e The eccentricity between the rotation axis and the revolution axis of the tool disk (2) M 0 is the bending moment of the flexible hinge (19) acting on the tool disk (2); β 1. β 2. Satisfies: ， ； in, R A , R B The radii of curvature of points A and B on the surface of workpiece (21) are respectively.

2. The deterministic shaping method for large and complex surfaces based on adaptive surface matching according to claim 1, characterized in that, When the surface of the workpiece (21) is a parabolic surface, the tool disk (2) satisfies the first adaptive matching criterion and the second adaptive matching criterion. The first adaptive matching criterion is: The second adaptive matching criterion is: The ω 0 represents the rotational angular velocity of the tool disk (2) during the shaping process. ρ The density of the tool disk (2), t The thickness of the tool disk (2) E The elastic modulus of the tool disk (2) is δ 0 represents the sagitta of the workpiece (21) in the contact area.

3. The deterministic shaping method for large and complex surfaces based on adaptive surface matching according to claim 1, characterized in that, The rotary drive assembly includes a motor (9) and a connecting seat (10) that can be fixed to the machine tool motion axis. The motor (9) is mounted on the connecting seat (10), and the output shaft of the motor (9) is coaxially connected to the revolution axis (8).

4. The deterministic shaping method for large and complex surfaces based on adaptive surface matching according to claim 1, characterized in that, The revolution and rotation transmission housing (3) is also equipped with a revolution driven wheel (6), a revolution driving wheel (22), a rotation driven wheel (24) and a rotation driving wheel (23). The revolution driving wheel (22) and the rotation driving wheel (23) are mounted on the revolution shaft (8). The revolution driven wheel (6) is fixed to the inner wall of the revolution and rotation transmission housing (3) and is connected to the revolution driving wheel (22) in a transmission connection. The rotation driven wheel (24) is mounted on the rotation shaft (18) and is connected to the rotation driving wheel (23) in a transmission connection.

5. The deterministic shaping method for large and complex surfaces based on adaptive surface matching according to claim 4, characterized in that, The revolution driven wheel (6), revolution driving wheel (22), rotation driven wheel (24) and rotation driving wheel (23) are all synchronous belt pulleys driven by synchronous belts.

6. The deterministic shaping method for large and complex surfaces based on adaptive surface matching according to any one of claims 1-5, characterized in that, The shaping membrane (1) includes a circumferentially segmented polyurethane membrane (101) and a central polyurethane membrane (102). The circumferentially segmented polyurethane membrane (101) is arranged circumferentially outside the central polyurethane membrane (102), and inter-membrane grooves (103) are provided between the circumferentially segmented polyurethane membranes (101). The sides of adjacent circumferentially segmented polyurethane membranes (101) are involutes.

7. The deterministic shaping method for large and complex surfaces based on adaptive surface matching according to any one of claims 1-5, characterized in that, A counterweight (20) is provided on the upper side of the tool disk (2), and the counterweight (20) is installed on one side of the rotation shaft (18).

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