A modular clamping table for machining large curved plates of model aircraft

Abstract

This utility model relates to a combined clamping station for processing large curved plates for model aircraft, including a support base, a rotary table mounted on the support base, and a support frame supporting a first edge clamping component and a second adsorption positioning component on the rotary table surface away from the support base. Multiple first edge clamping components are arranged circumferentially at intervals on a suspended mounting plate of the support frame, and multiple second adsorption positioning components are arranged in a dot matrix within a central plane area defined by the multiple first edge clamping components on the suspended mounting plate. The second adsorption positioning components are also connected to a negative pressure generating module mounted on the rotary table. This utility model can effectively and stably clamp large curved plates through the cooperation of multiple clamping methods and can adapt the clamping structure to the differences in plate size.

Description

Technical Field

[0001] This utility model relates to the technical field of sheet metal clamping mechanisms for model aircraft manufacturing, and in particular to a combined clamping table for processing large-size curved plates for model aircraft. Background Technology

[0002] In industrial production, tooling fixtures are frequently used to process workpieces, test their functions, or assist in assembly in order to improve production efficiency and produce workpieces that meet requirements. This is especially true in the aerospace manufacturing field, where the types and structures of components are complex, including not only regularly shaped parts but also irregularly shaped curved parts. The workpieces used to construct full-size aircraft models have complex structures, large dimensions, high length-to-width ratios, and are mostly flat. Due to their large size and the fact that they are generally produced in small to medium batches or even as single pieces, there is a lack of corresponding milling equipment for processing such workpieces.

[0003] With the development of lightweight full-size aircraft model parts, irregularly shaped parts using integrated molding technology have emerged. When machining large curved plates such as aircraft skin, the blank is usually placed directly on the machine tool table or in machine tool accessories such as machine vises to clamp one or several areas of the workpiece. This clamping method suffers from low positioning accuracy, high labor intensity, and low production efficiency when machining multiple workpieces of the same model in the same batch, increasing production costs. Furthermore, some existing fixtures use high-precision clamping structures designed to match the workpiece to ensure clamping stability and accuracy, thus guaranteeing machining accuracy and quality. However, these fixtures are usually specialized and cannot meet the machining needs of multiple batches of different models of workpieces. Given that full-size aircraft model parts typically have small batches of single-dimensional workpieces, these fixtures suffer from high manufacturing costs, low cost-effectiveness, low overall efficiency, and poor versatility. Utility Model Content

[0004] The purpose of this utility model is to provide a modular clamping station for processing large curved plates of model aircraft, which can effectively and stably clamp large curved plates through the cooperation of multiple clamping methods and can adaptably reconstruct the clamping structure according to the difference in plate size. This solves the problems that existing clamping fixtures for large curved plates and other parts of full-size aircraft models are usually dedicated and cannot be adapted to different types of plates, and that existing clamping methods are single edge clamping with poor clamping stability, which cannot guarantee the stability of processing and affect the accuracy and quality of processing.

[0005] The technical solution adopted by this utility model is as follows: a combined clamping table for processing large curved plates of model aircraft, including a support base, a rotating table provided on the support base, and a support frame for arranging a first edge clamping component and a second adsorption positioning component on the table surface of the rotating table away from the support base. A plurality of the first edge clamping components are arranged circumferentially at intervals on the suspended mounting plate of the support frame, and a plurality of the second adsorption positioning components are arranged in a dot matrix within the central plane area defined by the plurality of the first edge clamping components on the suspended mounting plate. The second adsorption positioning components are also connected to a negative pressure generating module mounted on the rotating table.

[0006] According to a preferred embodiment, the translation adjustment mechanism of the first edge clamping assembly is embedded in the seat of the suspended mounting plate, and a support sleeve is inserted into the translation block of the translation adjustment mechanism. A first threaded support rod is threaded through the support sleeve, and the axial upper end of the first threaded support rod is connected to the deflection seat through a rotary connecting seat. Furthermore, a clamping head capable of clamping the edge plate of the curved plate is also provided on the deflection seat.

[0007] According to a preferred embodiment, the translation adjustment mechanism includes an alignment guide groove embedded in the suspended mounting plate, a translation block slidably mounted in the two alignment guide grooves, and a translation drive screw and a guide slide rod that pass through the translation block in parallel and are respectively arranged in the two alignment guide grooves.

[0008] According to a preferred embodiment, the deflection seat includes a U-shaped seat body mounted on the connecting seat plate of the rotary connecting seat, a rotating shaft rotatably extending laterally through the U-shaped seat body, and a rotating block fitted on the rotating shaft.

[0009] According to a preferred embodiment, the clamping head includes an inverted C-shaped component connected to the rotating block and a clamping screw threaded onto the top surface of the inverted C-shaped component, wherein a screwing block is provided at the upper axial end of the clamping screw, and a pressing clamping plate is rotatably connected to the lower axial end of the clamping screw.

[0010] According to a preferred embodiment, the internally threaded sleeves of the second adsorption positioning component are inserted into the suspended mounting plate in a dot matrix arrangement, and a second threaded support tube is inserted into the internal thread of the internally threaded sleeve; a support plate is connected to the upper axial end of the second threaded support tube, and shaping screws are inserted into the support plate in a circumferentially spaced manner; a return spring is fitted on the rod body of the shaping screw above the support plate, and a limit nut is threaded onto the rod body below the support plate; the upper axial ends of several shaping screws are all connected to the suction cup through universal ball joints.

[0011] According to a preferred embodiment, the suction cup is connected to the negative pressure generating module through a first air guide tube that passes through the support plate and is disposed in the cavity of the second threaded support tube.

[0012] According to a preferred embodiment, the negative pressure generating module includes a co-pressure chamber mounted on a platform and a negative pressure pump connected to the co-pressure chamber, wherein the co-pressure chamber is connected to a rotary pipe joint via a second air guide pipe, and the end of the rotary pipe joint away from the second air guide pipe is connected to the first air guide pipe.

[0013] The beneficial effects of this utility model are: The first edge clamping component and the second adsorption positioning component provided in this application can cooperate to construct a reconfigurable support clamping structure to provide adaptive support and positioning for curved sheet materials of different sizes and shapes. The cooperation of the two different clamping structures can ensure the stability of the clamping and positioning, as well as the stability and accuracy of the support and positioning, enabling high-quality processing of the curved sheet materials in subsequent processing. Furthermore, when processing multiple curved sheet materials of the same model, it allows for convenient and quick assembly and disassembly of the clamps, reducing the labor intensity of operators and improving the ease of assembly and disassembly, thereby reducing labor costs in production and processing. In addition, the first edge clamping component and the second adsorption positioning component can also be reconfigured according to needs, allowing them to cooperate to clamp curved sheet materials of different sizes and shapes, thereby improving the versatility and overall practicality of the clamping structure and reducing the production cost of manufacturing the clamping structure when processing multiple batches of curved sheet materials.

[0014] The cooperation between the first edge clamping component and the second adsorption positioning component can effectively ensure that the workpiece is in a reasonable position relative to the machine tool or the machining tool, ensuring machining accuracy and efficiency, improving work efficiency and quality during the machining process, greatly expanding the application range, and greatly ensuring the safety and reliability of the machine tool. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of a preferred modular clamping table for machining large curved plates of model aircraft proposed in this utility model. Figure 2 This is a side view of the first edge clamping assembly of a preferred modular clamping table for processing large curved plates of model aircraft proposed in this utility model. Figure 3 This is a schematic diagram of the axial cross section of the second adsorption and positioning component of a preferred modular clamping table for machining large curved plates of a model aircraft proposed in this utility model. Detailed Implementation

[0016] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the present utility model will be briefly introduced below in conjunction with the accompanying drawings and descriptions of the embodiments or the prior art. Obviously, the following description of the structure of the drawings is only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0017] The technical solutions provided by this utility model will be described in detail below with reference to the accompanying drawings and through embodiments. It should be noted that the descriptions of these embodiments are for the purpose of helping to understand this utility model, but do not constitute a limitation thereof. In some examples, because some implementation methods belong to existing or conventional technology, they are not described or are not described in detail. The serial numbers assigned to components in this document, such as "first," "second," etc., are only used to distinguish the described objects and do not have any sequential or technical meaning.

[0018] The following is a detailed explanation with reference to the accompanying drawings. Example

[0019] This application provides a combined clamping table for processing large curved plates of model aircraft, which includes a support base 1, a rotary table 2, a support frame 3, a first edge clamping assembly 4, a second adsorption positioning assembly 5, and a negative pressure generating module 6.

[0020] according to Figure 1-3In one specific embodiment, the support base 1 can be connected to the mounting table of a multi-purpose machine tool used for milling and other machining operations via mounting bolts or other connecting components. A rotary table 2 is provided on the support base 1, capable of driving the curved sheet material to rotate controllably, thereby changing the position of the sheet material directly below the milling head. A support frame 3, capable of mounting a first edge clamping assembly 4 and a second adsorption positioning assembly 5, is also supported on the rotary table 2 away from the support base 1. Multiple first edge clamping assemblies 4 are arranged circumferentially at intervals on the suspended mounting plate base 31 of the support frame 3, in a manner that allows for adaptive clamping of the edges of the curved sheet material. Several second adsorption positioning components 5 are arranged in a dot matrix within the central plane area defined by multiple first edge clamping components 4 of the suspended mounting base 31, in a manner that allows for adaptive adsorption and support of the curved sheet material. They are adjustable to adsorb onto the lower surface of the curved sheet material, thereby limiting and providing multi-point support. The first edge clamping components 4 and the second adsorption positioning components 5 can cooperate to construct a reconfigurable support and clamping structure, providing adaptive support and limiting for curved sheets with different surface morphologies. The second adsorption positioning components 5 are also connected to a negative pressure generating module 6 mounted on the rotary table 2. Under the operator's control, the negative pressure generating module 6 performs negative pressure suction, allowing the second adsorption positioning components 5 attached to the surface of the curved sheet material to form a negative pressure cavity and stably adhere to the surface, thus achieving an effective connection between the two. The first edge clamping component 4 and the second adsorption positioning component 5 provided in this application can cooperate to construct a reconfigurable support and clamping structure to provide adaptive support and positioning for curved sheet materials of different sizes and shapes. The cooperation of the two different clamping structures can ensure the stability of the clamping and positioning and the stability and accuracy of the support and positioning, enabling high-quality processing of the curved sheet materials in subsequent processing. When processing multiple curved sheet materials of the same model, it is convenient and quick to disassemble and assemble the clamps, reducing the labor intensity of operators and the convenience of disassembly and assembly, thus reducing the labor costs of production and processing. In addition, the first edge clamping component 4 and the second adsorption positioning component 5 can also be reconfigured according to needs, so that the two can cooperate to clamp curved sheet materials of different sizes and shapes, thereby improving the versatility and overall practicality of the clamping structure and reducing the production cost of manufacturing the clamping structure when processing multiple batches of curved sheet materials.

[0021] Preferably, the support base 1 has multiple sets of through holes on its plate edge, thereby limiting its connection with the machine tool's mounting table by bolt and nut structural members passing through the through holes. The support base 1 can place the entire clamping structure and the curved plate clamped and connected by the clamping structure in the workspace as needed, so that the curved plate can be milled, ground, and the edge allowance of the plate can be trimmed using machining equipment such as lathes.

[0022] Preferably, the rotary table 2 includes a supporting frustum 21 fixedly mounted on the center of the surface of the supporting base 1 by welding or other means, a disc bearing body 22 disposed on the supporting frustum 21, and a table plate 23 rotatably connected to the supporting frustum 21 via the disc bearing body 22, thereby facilitating the operator to rotate the table plate 23 to change the processing position of the curved sheet material as needed. Preferably, an annular baffle 231 is connected to the side edge of the table plate 23 by welding or other means. More preferably, an internal gear ring 232 is provided on the inner ring surface of the annular baffle 231. Preferably, a rotary adjustment motor 24 is also provided on the supporting base 1. Specifically, the transmission gear 241 on the output shaft of the rotary adjustment motor 24 meshes with the internal gear ring 232. Preferably, the rotary adjustment motor 24 is an MTN-750W servo motor with a repeatability positioning accuracy ≤5 arcseconds (approximately 0.0014°), a load ≥200kg, and 360° arbitrary angle positioning, suitable for frequent start-stop scenarios.

[0023] Preferably, the suspended mounting plate 31 of the support frame 3 is connected to the platform 23 via a plurality of circumferentially spaced support rods 32. More preferably, the upper and lower axial ends of the support rods 32 are connected to the suspended mounting plate 31 and the platform 23 respectively by welding or flanges. The suspended mounting plate 31 provides an insertion plane, thereby facilitating the adjustment of the height of the first edge clamping assembly 4 and the second adsorption positioning assembly 5, which can be height-adjusted and inserted onto its plate, as needed, providing lifting and adjustment space.

[0024] Preferably, the first edge clamping assembly 4 includes a translation adjustment mechanism 41, a support sleeve 42, a first threaded support rod 43, a rotary connecting seat 44, a deflection seat 45, and a clamping head 46. Preferably, the translation adjustment mechanisms 41 of the four first edge clamping assemblies 4 are mounted on the base of the suspended mounting plate 31 in a rotationally symmetrical manner. More preferably, the support sleeve 42 is inserted into the translation block 412 of the translation adjustment mechanism 41 by welding or other means. Preferably, a liftable first threaded support rod 43 is threaded through the support sleeve 42. Preferably, the axial upper end of the first threaded support rod 43 is connected to the deflection seat 45 through the rotary connecting seat 44. Preferably, a clamping head 46 capable of clamping the edge plate of the curved plate is also provided on the deflection seat 45. Specifically, when the threaded support rod 43 rotates and changes its support height, the operator can manually adjust the rotating connecting seat 44 so that the clamping head 46 on the rotating adjusting seat 44 has its open end facing the edge of the curved sheet material. All of the above operations are pre-adjusted manually by the operator to adapt to different curved sheets, thereby achieving effective clamping and positioning of different curved sheets. During the rotation of the threaded support rod 43, the clamping head 46 may rotate synchronously; the operator can manually adjust the opening orientation of the relatively rotatable clamping head 46 and the tilt angle of the opening when it engages with the sheet material. All of the above are manual adjustments. Once the height and opening inclination are set, the operator only needs to simply rotate the clamping head 46 and tighten the clamping screw 462 of the clamping head 46 each time to effectively and quickly assemble and disassemble multiple curved plates of the same model, which improves the efficiency of assembly and disassembly to a certain extent. Furthermore, it can adapt to different models of curved plates by adjusting the height and opening inclination, realizing the quick clamping of plates of the same model and the adjustable adaptation of plates of different models.

[0025] Preferably, the translation adjustment mechanism 41 includes an alignment guide groove 411 embedded in the suspended mounting plate 31, a translation block 412 slidably mounted in the two alignment guide grooves 411, and a translation drive screw 413 and a guide slide rod 414 that pass parallel to the translation block 412 and are respectively mounted in the two alignment guide grooves 411. More preferably, the two ends of the translation drive screw 413 are rotatably inserted into the two end walls of the alignment guide groove 411. More preferably, one end of the translation drive screw 413 has a smooth rod that extends through the end wall of the alignment guide groove 411 to the outside of the suspended mounting plate 31, and the end of the rod is connected to a screw adjustment block. This allows the operator to manually rotate the screw adjustment block to rotate the translation drive screw 413. The rotation of the translation drive screw 413 then drives the translation block 412, which is threaded to it and whose movement direction is defined by the alignment guide groove 411 and the guide slide rod 414, to reciprocate controllably along the axial direction of the translation drive screw 413. Preferably, the support sleeve 42 passes through the center of the translation block 412, placing it between two symmetrically arranged alignment guide grooves 411.

[0026] Preferably, the rotary bearing body 441 of the rotary connecting seat 44 is fitted onto the upper axial end of the first threaded support rod 43. More preferably, the rotary bearing body 441 supports the connecting seat plate 442 in an embedded manner. The rotary connecting seat 44 enables relative rotation of the clamping head 46, thereby facilitating individual adjustment of the orientation of the clamping head 46.

[0027] Preferably, the deflection seat 45 includes a U-shaped seat 451 mounted on a connecting seat plate 442 of a rotary connecting seat 44, a rotating shaft 452 rotatably and laterally passing through the U-shaped seat 451, and a rotating block 453 fitted on the rotating shaft 452. Preferably, the rotating block 453 is also connected to the clamping head 46 to achieve adjustability of the tilt angle of the clamping head 46. More preferably, a limiting screw is provided on the vertical plate of the U-shaped seat 451, thereby limiting the tilt angle of the rotating block 453 by adjusting the limiting screw against the surface of the rotating block 453 to position the tilt posture of the clamping head 46.

[0028] Preferably, the clamping head 46 includes an inverted U-shaped member 461 connected to the rotating block 453 and a clamping screw 462 threaded onto the top surface of the inverted U-shaped member 461. Preferably, a screwing block 463 is fixedly connected to the upper axial end of the clamping screw 462. More preferably, a pressing clamping plate 464 is rotatably connected to the lower axial end of the clamping screw 462. Specifically, the lower surface of the pressing clamping plate 464 is covered with an anti-slip silicone pad, which improves clamping stability while preventing rigid clamping from damaging the curved panel.

[0029] Preferably, the internally threaded sleeve 51 of the second adsorption positioning component 5 is inserted into the suspended mounting plate 31 in a dot matrix arrangement. Preferably, a second threaded support tube 52, capable of changing the support height by screwing, is inserted into the internal thread of the internally threaded sleeve 51. Preferably, a support plate 53 is connected to the upper axial end of the second threaded support tube 52, and shaping screws 54 are inserted into the support plate 53 in a circumferentially spaced manner. Preferably, a return spring 55 is fitted on the rod of the shaping screw 54 above the support plate 53, and a limit nut 56 is threaded onto the rod of the shaping screw 54 below the support plate 53. Preferably, the upper axial ends of several shaping screws 54 are all connected to the suction cup 58 through universal ball joints 57, so that when several shaping screws 54 provide different support heights, they can cooperate to limit the tilting posture of the suction cup 58. Specifically, the universal ball joint 57, as a conventional variable-angle connection structure, has a specific structure that is existing technology and will not be elaborated upon in this application. This application only needs to select existing universal ball joint structural components of different sizes according to requirements. That is, during production and assembly, this application only needs to purchase products of specific sizes from professional universal ball joint manufacturers. During assembly, the operator connects the lower movable end of the universal ball joint 57 to the shaping screw 54 by welding, and the upper movable end of the universal ball joint 57 to the suction cup 58 body or the slider that is slidably connected to the bottom surface of the suction cup 58 by welding. More preferably, four universal ball joints 57 are connected to the bottom surface of the same suction cup 58, wherein two adjacent universal ball joints 57 are connected to the slider structure, and the other two adjacent universal ball joints 57 are directly connected to the bottom surface of the suction cup 58. Preferably, the suction cup 58 can be a UEP300l type vacuum gripping suction cup with a filling gasket, which can adaptably and effectively adhere to the surface of curved plates of different shapes. Preferably, the suction cup 58 is connected to the negative pressure generating module 6 through a first air guide tube 59 that passes through the support plate 53 and is disposed in the cavity of the second threaded support tube 52. Preferably, at least a portion of the first air guide tube 59 is a bendable elastic tube, so that it can bend with the tilt of the suction cup 58.Specifically, the working height of the suction cup 58 is adjusted by rotating the second threaded support tube 52 in the internal threaded sleeve 51. Then, the sizing screw 54 connected to the same suction cup 58 via the universal ball head 57 can be adjusted to different heights as needed, so that the suction cup 58 can be in a reconfigurable tilted posture and adaptably adhered to curved plates with different surface shapes. By generating negative pressure in the inner cavity of the suction cup 58, the suction cup 58 can effectively adsorb and clamp the curved plate. When the curved plate needs to be disassembled and replaced, the curved plate can be removed simply by releasing the negative pressure. Furthermore, when processing multiple plates of the same model, it is only necessary to control the negative pressure switch and manually press the curved plate lightly onto the suction cup 58 to achieve effective adsorption and clamping. The postures of the multiple second adsorption positioning components 5 are in a stable and unchanging state, thereby improving the efficient continuous clamping of multiple curved plates of the same model in the same batch. When different types of curved sheet materials need to be processed, first place a curved sheet material on the second adsorption positioning component 5, and then manually adjust the height and posture of the different second adsorption positioning components 5 so that multiple suction cups 58 can be effectively attached, thereby realizing the reconstruction of the support adsorption clamping structure.

[0030] Preferably, the negative pressure generating module 6 includes a co-pressure chamber 61 mounted on the platform 23 and a negative pressure pump 62 connected to the co-pressure chamber 61. Preferably, the co-pressure chamber 61 is connected to a rotary pipe joint 64 fixedly embedded on the platform 23 via a second air guide pipe 63. More preferably, the end of the rotary pipe joint 64 away from the second air guide pipe 63 is connected to the first air guide pipe 59. Preferably, the negative pressure pump 62 can be a B-V750-30 / 2 type two-stage oil-free vacuum pump with an ultimate vacuum of -0.98 Bar, suitable for frequent start-stop operation. It features a quiet design, an adjustable pumping speed of 105-240 L / min, and a heat dissipation design. The rotary pipe joint 64 provided in this application is a commonly used rotary pipe joint product that can rotate relative to each other and has a sealed cavity. One end of it can rotate with the first air guide pipe 59, while the other end is fixedly embedded in the suspended mounting plate 31 to limit its working position.

[0031] Preferably, the electrical components such as the rotary adjustment motor 24 and the negative pressure pump 62 involved in this application are all electrically connected to the controller and the power supply. The control method of this application is controlled by the controller. The control circuit of the controller can be implemented by simple programming by those skilled in the art. The power supply is also common knowledge in the art. Furthermore, this utility model is only used to protect the mechanical device and its mechanical structural features. Therefore, this utility model will not explain the control method and circuit connection in detail.

[0032] For surface connections between components not explicitly specified in this application, conventional bolt connections, snap-fit ​​connections, or fixed connections such as welding can be used. As these are conventional connection methods, this application will not elaborate further on this part. Specifically, the connecting ends of the assembled components all form flange structures, and the two flange structures are connected by bolts, gaskets, or other structures.

[0033] This utility model is not limited to the above-described optional embodiments. Anyone can derive other various forms of products under the guidance of this utility model. However, regardless of any changes in shape or structure, any technical solution falling within the scope of the claims of this utility model is within the protection scope of this utility model. Those skilled in the art should understand that this utility model specification and its drawings are illustrative and do not constitute a limitation on the claims. The protection scope of this utility model is defined by the claims and their equivalents. Throughout the text, features introduced by "preferred" are merely optional and should not be construed as mandatory. Therefore, the applicant reserves the right to abandon or delete relevant preferred features at any time.

Claims

1. A modular clamping table for machining large curved plates of model aircraft, comprising a support base (1), characterized in that, A rotating platform (2) is provided on the support base (1), and a support frame (3) capable of accommodating the first edge clamping assembly (4) and the second adsorption positioning assembly (5) is also supported on the platform of the rotating platform (2) away from the support base (1). Multiple first edge clamping components (4) are arranged circumferentially on the suspended mounting plate (31) of the support frame (3), and multiple second adsorption positioning components (5) are arranged in a dot matrix within the central plane area enclosed by multiple first edge clamping components (4) of the suspended mounting plate (31). The second adsorption positioning component (5) is also connected to the negative pressure generating module (6) mounted on the rotating table (2).

2. The combined clamping table for processing large-size curved plate of model airplane according to claim 1, characterized in that, The translation adjustment mechanism (41) of the first edge clamping assembly (4) is embedded in the seat of the suspended mounting plate (31), and a support sleeve (42) is inserted into the translation block (412) of the translation adjustment mechanism (41). A first threaded support rod (43) is threaded through the inner sleeve (42), and the upper axial end of the first threaded support rod (43) is connected to the deflection seat (45) through a rotating connecting seat (44). A clamping head (46) capable of clamping the edge plate of the curved plate is also provided on the deflection seat (45).

3. The combined clamping table for processing large-size curved plate of model airplane according to claim 2, characterized in that, The translation adjustment mechanism (41) includes an alignment guide groove (411) embedded in the suspended mounting plate (31), a translation block (412) slidably mounted in the two alignment guide grooves (411), and a translation drive screw (413) and a guide slide rod (414) that are parallel to each other on the translation block (412) and respectively mounted in the two alignment guide grooves (411).

4. The combined clamping table for processing large-size curved plate of model airplane according to claim 3, characterized in that, The deflection seat (45) includes a U-shaped seat (451) mounted on a connecting seat plate (442) of the rotary connecting seat (44), a rotating shaft (452) rotatably and laterally passing through the U-shaped seat (451), and a rotating block (453) fitted on the rotating shaft (452).

5. The combined clamping table for processing large-size curved plate of model airplane according to claim 4, characterized in that, The clamping head (46) includes an inverted U-shaped member (461) connected to the rotating block (453) and a clamping screw (462) threaded onto the top surface of the inverted U-shaped member (461), wherein, The clamping screw (462) is provided with a screwing block (463) at its upper axial end, and a pressing clamping plate (464) is rotatably connected to the lower axial end of the clamping screw (462).

6. The combined clamping table for processing large-size curved plate of model airplane according to claim 5, characterized in that, The internal threaded sleeve (51) of the second adsorption positioning component (5) is inserted into the suspended mounting plate (31) in a dot matrix arrangement, and a second threaded support tube (52) is inserted into the internal thread of the internal threaded sleeve (51). The second threaded support tube (52) is connected to a support plate (53) at its axial upper end, and a shaped screw (54) is inserted into the support plate (53) in a circumferentially spaced manner. The shaping screw (54) is fitted with a return spring (55) on the rod body above the support plate (53), and a limit nut (56) is threaded onto the rod body below the support plate (53). The upper axial ends of several of the shaping screws (54) are connected to the suction cup (58) via universal ball joints (57).

7. The combined clamping table for machining large curved plates of model aircraft as described in claim 6, characterized in that, The suction cup (58) is connected to the negative pressure generating module (6) through a first air guide pipe (59) that passes through the support plate (53) and is installed in the cavity of the second threaded support pipe (52).

8. The modular clamping table for machining large curved plates of model aircraft as described in claim 7, characterized in that, The negative pressure generating module (6) includes a co-pressure chamber (61) mounted on a platform (23) and a negative pressure pump (62) connected to the co-pressure chamber (61), wherein, The co-pressure chamber (61) is connected to the rotary pipe joint (64) through the second air guide pipe (63), and the end of the rotary pipe joint (64) away from the second air guide pipe (63) is connected to the first air guide pipe (59).

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