Numerical control machine tool for drilling production of positioning shaft of self-adaptive clamping unmanned aerial vehicle

Abstract

The invention relates to a numerically-controlled machine tool for drilling production of a positioning shaft of a self-adaptive clamping unmanned aerial vehicle, and belongs to the technical field of machine tool machining of unmanned aerial vehicle parts. The numerically-controlled machine tool for drilling production of the positioning shaft of the self-adaptive clamping unmanned aerial vehicle comprises a machine tool body, a main shaft module, a tool turret module, a feeding and moving module, an auxiliary function module and a control system module, the machine tool body serves as a mounting foundation, and the main shaft module is used for providing cutting power; the main shaft module conducts programmable axial position adjustment on a positioning disc through an electric cylinder, so that an internal supporting point of the positioning module can be dynamically close to different turning ring groove machining parts, the effective overhanging length and the stress state of the unmanned aerial vehicle positioning shaft are actively optimized, the rigidity for resisting radial cutting force is directly enhanced, elastic bending is restrained, and the stability of the unmanned aerial vehicle positioning shaft is improved. According to the method, under the condition that the unmanned aerial vehicle positioning shaft is only locked by a single end, the specific requirement of each machining part for rigidity can be met through the position change of the internal supporting point, clamping is simplified, and the process flexibility is improved.

Description

Technical Field

[0001] This invention relates to the field of machine tool processing technology for unmanned aerial vehicle (UAV) parts, and in particular to a CNC machine tool for drilling positioning axes for adaptive clamping of UAVs. Background Technology

[0002] The positioning axis of the UAV is usually clamped on a CNC turning center and the precision drilling of the end and the turning of the circumferential groove are completed in a single machining process. This turning and drilling composite process can significantly reduce repeated positioning errors and ensure high coaxiality and positional accuracy of the hole and groove, thereby improving production efficiency and the overall fitting accuracy of the parts.

[0003] Because the UAV positioning axis is slender and small in size, it is prone to slight elastic bending under the radial cutting force of the turning annular groove. This bending causes a dynamic shift in the relative position between the tool and the UAV positioning axis, making it difficult to maintain a precise spatial relationship between the drilling axis and the turning annular groove datum in composite machining, ultimately restricting further improvement of machining accuracy. Summary of the Invention

[0004] Therefore, it is necessary to provide a CNC machine tool for drilling and producing UAV positioning axes that can adaptively clamp the UAV positioning axes, which is necessary to address the problem that the radial cutting force causes elastic bending of the positioning axis during the machining process of turning and drilling, making it difficult to guarantee the coaxiality of the hole and groove and restricting the improvement of accuracy.

[0005] A CNC machine tool for drilling positioning axes of an adaptive clamping UAV includes a bed, a spindle module, a turret module, a feed and motion module, an auxiliary function module, and a control system module. The bed serves as the mounting base, the spindle module provides cutting power, the turret module carries the cutting tool, the feed and motion module drives the corresponding cutting tool to achieve precise movement, the auxiliary function module ensures machining, and the control system module provides overall control.

[0006] In one embodiment, the spindle module includes a spindle box installed inside the bed, a speed transmission module installed inside the spindle box, a hollow spindle installed in the drive section of the speed transmission module, a hydraulic chuck fixedly connected to the drive section of the hollow spindle, an electric cylinder fixedly connected to the vertical inner wall of the spindle box, the end of the output shaft of the electric cylinder passing through the hollow spindle and extending into the interior of the hydraulic chuck, a positioning plate rotatably connected to the end of the output shaft of the electric cylinder, and a positioning module installed inside the positioning plate.

[0007] In one embodiment, the positioning disk has an internal mounting cavity, and two guide cavities, each communicating with the mounting cavity, are located at the end of the positioning disk facing away from the electric cylinder. The positioning module includes a micro servo motor, which is fixedly connected to the inside of the mounting cavity. A torque sensor is fixedly connected to the end of the output shaft of the micro servo motor, and a bidirectional drive assembly is fixedly connected to the end of the output shaft of the torque sensor. The two output shafts of the bidirectional drive assembly pass through the interiors of the two guide cavities, respectively. The opposing ends of the two output shafts of the bidirectional drive assembly are rotatably connected to threaded columns that are rotatably connected to the adjacent guide cavities. A threaded sleeve that is slidably connected to the guide cavity is threadedly connected to the surface of the threaded column. A clamping member is fixedly connected to the end of the threaded sleeve facing away from the micro servo motor. An electrical rotary joint is embedded between the electric cylinder and the positioning disk. The micro servo motor and the torque sensor are both wiredly connected to the control system module through the electrical rotary joint.

[0008] In one embodiment, the clamping member includes a mounting post, which is fixedly connected to one end of the threaded sleeve facing away from the micro servo motor, and a clamping plate is fixedly connected to one end of the mounting post facing the center line of the positioning disk, with the two clamping plates being staggered.

[0009] In one embodiment, the vertical cross-sectional shape of the clamping plate is arc-shaped, and the arc opening of the clamping plate faces the centerline of the positioning disk.

[0010] In one embodiment, the positioning disk has two U-shaped cavities that are respectively connected to the adjacent guide cavities. The positioning module also includes two protective components. The protective components include an annular sealing strip that is slidably connected to the inside of the U-shaped cavity. The surface of the annular sealing strip has a through hole that is fixedly connected to the threaded sleeve. The end of the annular sealing strip facing away from the micro servo motor is flush with the end of the positioning disk facing away from the electric cylinder.

[0011] In one embodiment, the positioning disk has two sets of guide channels that are connected to adjacent loop cavities. The vertical cross-sectional shapes of the loop cavities and guide channels are matching rounded loop shapes. A guide shaft is embedded in the annular sealing strip, and the end of the guide shaft extends into the interior of the guide channel.

[0012] In one embodiment, the number of guide shafts is not less than ten, and the centerline of the guide shafts is offset perpendicular to the centerline of the threaded column.

[0013] In one embodiment, each group of guide channels consists of two channels, with two adjacent guide channels symmetrically distributed on both sides of the U-shaped cavity, and the two ends of the guide shaft penetrating into the interior of the adjacent guide channels.

[0014] In one embodiment, both ends of the guide shaft are semi-circular, and the semi-circular portion of the guide shaft is located inside the adjacent guide channel.

[0015] In one embodiment, the hollow inner wall of the hydraulic chuck is provided with a guide groove parallel to the axis of the hydraulic chuck, and a guide block that is fixedly connected to the positioning plate is slidably connected inside the guide groove.

[0016] 1. The aforementioned adaptive clamping CNC machine tool for drilling the positioning axis of a UAV uses an electric cylinder to programmably adjust the axial position of the positioning plate, allowing the internal support points of the positioning module to dynamically approach different turning ring groove machining areas. This actively optimizes the effective overhang length and stress state of the UAV positioning axis, directly enhancing the rigidity against radial cutting forces to suppress elastic bending. This method, even when the UAV positioning axis is locked at only one end, can meet the specific rigidity requirements of each machining area by changing the position of the internal support points, simplifying clamping and improving process flexibility. 2. The positioning module uses a torque sensor to monitor the clamping force in real time and forms a closed loop with the control system module. At the same time, the protective components maintain a high-precision and stable axial positioning plane. The synergy of the two can provide adaptive and uniformly centered dynamic clamping force throughout the process, actively counteracting the radial force fluctuations caused by changes in cutting parameters. This ensures the continuous and stable positioning axis reference of the UAV in composite machining, and reliably guarantees the design coaxiality and positional accuracy between the hole and the slot. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in this invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0018] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is a schematic diagram of the overall structure of the present invention with the partial bed removed; Figure 3 This is a cross-sectional schematic diagram of the entire spindle module in this invention; Figure 4 This is a partial structural diagram of the spindle module in this invention; Figure 5 This is a partial cross-sectional view of the spindle module in this invention; Figure 6 This is a schematic diagram showing the connection between the positioning module and the guide block and the positioning disk in this invention; Figure 7 This is a cross-sectional schematic diagram of the positioning module, guide block, and positioning disk in this invention; Figure 8 for Figure 7 Enlarged view of point A in the middle; Figure 9 This is a schematic diagram of the positioning module in this invention; Figure 10 This is an exploded view of the positioning disk in this invention; Figure 11 This is a product image of the UAV positioning axis after machining in this invention.

[0019] Figure label: 100. Bed; 200. Spindle module; 210. Spindle box; 220. Speed ​​transmission module; 230. Hollow spindle; 240. Hydraulic chuck; 241. Guide groove; 250. Electric cylinder; 260. Positioning plate; 261. Mounting cavity; 262. Guide cavity; 263. Return cavity; 264. Guide channel; 270. Positioning module; 271. Miniature servo motor; 272. Torque sensor; 273. Bidirectional... Drive assembly; 274, threaded post; 275, threaded sleeve; 276, clamping component; 2761, mounting post; 2762, clamping plate; 277, electrical rotary joint; 278, protective assembly; 2781, annular sealing strip; 2782, through hole; 2783, guide shaft; 280, guide block; 300, turret module; 400, feed and motion module; 500, auxiliary function module; 600, control system module. Detailed Implementation

[0020] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0021] It should be noted that when a component is referred to as being "fixed to" or "set on" another component, it can be directly on the other component or there may be an intermediate component. When a component is considered to be "connected to" another component, it can be directly connected to the other component or there may be an intermediate component present. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used in this specification are for illustrative purposes only and do not represent the only possible implementation.

[0022] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this invention, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0023] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature and the second feature are in indirect contact through an intermediate medium. Furthermore, "above," "over," and "on top" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0024] Unless otherwise defined, all technical and scientific terms used in this specification have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used in this specification is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The term "and / or" as used in this specification includes any and all combinations of one or more of the associated listed items.

[0025] The following is combined Figure 1 - Figure 10 The present invention describes a CNC machine tool for drilling positioning axes of an adaptive clamping unmanned aerial vehicle.

[0026] In one embodiment, a CNC machine tool for drilling and positioning of a UAV with adaptive clamping includes a bed 100, a spindle module 200, a turret module 300, a feed and motion module 400, an auxiliary function module 500, and a control system module 600. The bed 100 serves as the mounting base, the spindle module 200 provides cutting power, the turret module 300 carries the cutting tool, the feed and motion module 400 drives the cutting tool to achieve precise movement, the auxiliary function module 500 ensures machining, and the control system module 600 provides overall control.

[0027] like Figure 3 - Figure 10As shown, the spindle module 200 includes a spindle box 210 installed inside the bed 100, which provides a high-rigidity mounting base and protection for all internal components. A speed transmission module 220 is installed inside the spindle box 210, providing spindle speed change functionality to adapt to the cutting speed requirements of different drilling processes. A hollow spindle 230 is installed in the drive section of the speed transmission module 220, serving as the power transmission shaft. Its hollow internal structure provides a through-pass for the output shaft of the electric cylinder 250 and the positioning plate 260. A hydraulic chuck 240 is fixedly connected to the drive section of the hollow spindle 230. A guide groove 241 parallel to its axis is opened in the hollow inner wall of the hydraulic chuck 240. A guide block 280 fixedly connected to the positioning plate 260 is slidably connected inside the guide groove 241. The cooperation between the guide groove 241 and the guide block 280 ensures that the positioning plate 260 is strictly parallel to the spindle during axial adjustment. The trajectory movement of the axis establishes a precise reference for the internal positioning function; an electric cylinder 250 is fixedly connected to the vertical inner wall of the spindle box 210, which provides controllable axial displacement drive for the positioning disk 260, allowing the positioning disk 260 to stop at different preset positions according to processing requirements, realizing programmable adjustment of the UAV positioning axis processing position; the electric cylinder 250 is wired to the control system module 600 via a wire; the end of the output shaft of the electric cylinder 250 passes through the hollow spindle 230 and extends into the interior of the hydraulic chuck 240, and the end of the output shaft of the electric cylinder 250 is rotatably connected to the positioning disk 260. The positioning disk 260 serves as an integrated platform, and the mounting cavity 261 and guide cavity 262 inside the positioning disk 260 provide a sealed installation and operating space for the positioning module 270. At the same time, the end of the positioning disk 260 and the protective component 278 together form the axial positioning surface of the UAV positioning axis; the positioning module 270 is installed inside the positioning disk 260.

[0028] like Figure 5 - Figure 10As shown, the positioning disk 260 has an internal mounting cavity 261, and two guide cavities 262 communicating with the mounting cavity 261 are opened at the end of the positioning disk 260 facing away from the electric cylinder 250. The positioning module 270 includes a micro servo motor 271 fixedly connected inside the mounting cavity 261, which serves as the power source for positioning and clamping. A torque sensor 272 is fixedly connected to the end of the output shaft of the micro servo motor 271. The torque sensor 272 monitors and outputs torque data during the clamping process to the control system module 600 in real time, providing key feedback for closed-loop control of the clamping force. A bidirectional drive assembly 273 is fixedly connected to the end of the output shaft of the torque sensor 272. The two output shafts of the bidirectional drive assembly 273 pass through the interiors of the two guide cavities 262, and the opposite ends of the two output shafts of the bidirectional drive assembly 273 are rotatably connected. A threaded post 274 is rotatably connected to the adjacent guide cavity 262; a threaded sleeve 275 is threadedly connected to the surface of the threaded post 274 and slidably connected to the guide cavity 262. The threaded post 274 and the threaded sleeve 275 form a helical transmission pair, which converts the rotational motion into the precise linear advance and retreat of the clamping member 276; the clamping member 276 is fixedly connected to the end of the threaded sleeve 275 facing away from the micro servo motor 271; an electrical rotary joint 277 is embedded between the electric cylinder 250 and the positioning disk 260. The electrical rotary joint 277 realizes the power and signal connection between the rotating positioning disk 260 and the fixed component, ensuring the stable power supply and data transmission of the micro servo motor 271 and the torque sensor 272 during dynamic operation; the micro servo motor 271 and the torque sensor 272 are both wiredly connected to the control system module 600 through the electrical rotary joint 277.

[0029] like Figure 9 As shown, the bidirectional drive assembly 273 consists of an active bevel gear shaft fixedly connected to the end of the output shaft of the torque sensor 272, and a driven bevel gear shaft meshing with the active bevel gear shaft and rotatably connected to the mounting cavity 261. Both ends of the driven bevel gear shaft are fixedly connected to active sprockets, and the surface of the active sprockets is connected to a chain belt. The inner surface of the chain belt is connected to a driven sprocket fixedly connected to the threaded post 274. The bidirectional drive assembly 273 converts the input torque into the synchronous counter-rotational motion of the two threaded posts 274 through the bevel gear and chain belt transmission mechanism. This transmission method ensures the symmetry of the driving force, enabling the clamping member 276 to apply a uniform and centered clamping force to the UAV positioning axis.

[0030] In this embodiment, the clamping member 276 includes a mounting post 2761, which is fixedly connected to one end of the threaded sleeve 275 facing away from the micro servo motor 271. A clamping plate 2762 is fixedly connected to one end of the mounting post 2761 facing the axis of the positioning disk 260, and the two clamping plates 2762 are staggered. The vertical cross-section of the clamping plate 2762 is arc-shaped, and the arc opening of the clamping plate 2762 faces the axis of the positioning disk 260. The mounting post 2761 of the clamping member 276 and the arc-shaped clamping plates 2762 at its ends can adaptively conform to the surface of the UAV positioning axis to achieve uniform internal support clamping. like Figure 6 - Figure 10 As shown, the positioning disk 260 has two loop-shaped cavities 263 that communicate with adjacent guide cavities 262. The positioning module 270 also includes two protective components 278. The protective component 278 includes an annular sealing strip 2781 that is slidably connected to the inside of the loop-shaped cavity 263. The surface of the annular sealing strip 2781 has through holes 2782 that are fixedly connected to the threaded sleeve 275. The end of the annular sealing strip 2781 facing away from the micro servo motor 271 is flush with the end of the positioning disk 260 facing away from the electric cylinder 250. The positioning disk 260 has two sets of guide channels 264 that communicate with adjacent loop-shaped cavities 263. The vertical... The cross-sectional shape is a matching rounded loop shape; a guide shaft 2783 is embedded inside the annular sealing strip 2781, and the end of the guide shaft 2783 extends into the interior of the guide channel 264; there are no fewer than ten guide shafts 2783, and the axis of the guide shaft 2783 is offset perpendicular to the axis of the threaded column 274; there are two guide channels 264 in each group, and two adjacent guide channels 264 are symmetrically distributed on both sides of the loop cavity 263, and the two ends of the guide shaft 2783 extend into the interior of the adjacent guide channel 264 respectively; the two ends of the guide shaft 2783 are semi-circular, and the semi-circular part of the guide shaft 2783 is located inside the adjacent guide channel 264.

[0031] In this embodiment, when the threaded sleeve 275 moves along the guide cavity 262, the annular sealing strip 2781, which is fixedly connected to the threaded sleeve 275, simultaneously expands or contracts. The semi-circular portions at both ends of the guide shaft 2783 embedded inside the annular sealing strip 2781 slide within the guide channels 264 symmetrically distributed on both sides of the loop cavity 263, thereby guiding and constraining the deformation path of the annular sealing strip 2781, so that the end of the annular sealing strip 2781 is always flush with the end face of the positioning disk 260. This process enables the annular sealing strip 2781 to form a dynamic seal on the opening of the guide cavity 262 during movement, effectively isolating external chips and coolant. At the same time, the flat end face of the annular sealing strip 2781 and the positioning disk 260 together form a stable positioning plane, providing a reliable axial support reference for the end face of the UAV positioning shaft.

[0032] like Figure 11 As shown, the drone positioning axis first needs to have two annular grooves made by turning near both ends of the circumference. Then, both ends of the drone positioning axis need to have holes and slots that coincide with the drone positioning axis made by drilling. The drone positioning axis needs to be processed in two parts with the center point of the drone positioning axis. After one part of the processing is completed, the operator needs to stop the machine and change the orientation of the drone positioning axis to ensure that the processed part is exposed outside the hydraulic chuck 240.

[0033] like Figure 1 - Figure 11 As shown, the operation flow of the spindle module 200 is as follows: 1. Equipment initialization and alignment: The control system module 600 starts the whole machine self-test; the output shaft of the electric cylinder 250 extends and retracts, driving the positioning plate 260 to move. The guide block 280 on the positioning plate 260 slides along the guide groove 241 of the hydraulic chuck 240, adjusting the positioning plate 260 to the preset position. II. Placement and Dual Clamping of the UAV Positioning Axis: The UAV positioning axis is placed inside the hydraulic chuck 240, making it abut against the positioning plate 260. The control system module 600 controls the hydraulic chuck 240 to clamp the UAV positioning axis, and at the same time starts the micro servo motor 271. The power of the micro servo motor 271 is transmitted to the bidirectional drive component 273 through the torque sensor 272, driving the two threaded columns 274 to rotate synchronously, driving the threaded sleeve 275 and the clamping component 276 to move, so that the arc-shaped clamping plate 2762 fits against the UAV positioning axis, completing the dual clamping. At the same time, the annular sealing strip 2781 moves with the threaded sleeve 275, and the guide shaft 2783 inside it slides along the guide channel 264 to achieve the sealing of the guide cavity 262. III. Start processing and real-time monitoring: The clamping torque is detected by the torque sensor 272 to confirm that the clamping is in place; the speed transmission module 220 drives the hollow spindle 230 to rotate, which drives the hydraulic chuck 240 and the UAV positioning axis to rotate synchronously for processing; during processing, the torque sensor 272 continuously detects the torque change and feeds it back to the control system module 600. IV. Adjustment of machining position and continued machining: When the machining position of the UAV positioning axis needs to be adjusted, the control system module 600 commands the transmission module 220 to stop and controls the hydraulic chuck 240 to release; adjust the extension and retraction of the output shaft of the electric cylinder 250, and drive the UAV positioning axis to move to the new position through the positioning plate 260 and the positioning module 270; after the displacement is completed, restart the hydraulic chuck 240 and the positioning module 270 for double clamping, and restart the machining process.

[0034] Working principle: The electric cylinder 250 of the spindle module 200 moves the positioning plate 260 axially and fixes it in the preset support position; while the hydraulic chuck 240 externally clamps the UAV positioning axis, the micro servo motor 271 drives the positioning module 270, so that the arc-shaped clamping plate 2762 of the clamping component 276 clamps the UAV positioning axis from the inside; during this process, the clamping force data monitored in real time by the torque sensor 272 is fed back to the control system module 600, and the system dynamically adjusts the output of the micro servo motor 271 according to the data, thereby realizing adaptive control of the clamping force and real-time monitoring of the clamping status; when processing requires When adjusting the axial position, the control system module 600 can instruct the hydraulic chuck 240 to release the UAV positioning axis. The electric cylinder 250 drives the positioning disk 260 and the positioning module 270 that holds the clamping to move the UAV positioning axis to the new position. Then the hydraulic chuck 240 re-clamps. This built-in coaxial double clamping structure effectively suppresses radial bending deformation during the turning of the slender UAV positioning axis by enhancing its rigidity, ensuring the coaxiality of subsequent drilling and turning of the ring groove. The closed-loop clamping force adaptive control and the programmable axial position adjustment function together improve the control accuracy, process adaptability and overall reliability of the machining process.

[0035] It should be noted that the subject of this application is the Haas ST-30 horizontal turning center. Specifically, the bed 100 employs a high-strength rigid structure to support all functional modules and ensure installation accuracy, providing stable support for UAV positioning axis drilling. The turret module 300 carries various drilling tools and related cutting tools, is compatible with standard tool holders, and features rapid tool change and high-precision repeatability, enabling it to complete UAV positioning axis drilling and related cutting operations. The feed and motion module 400 uses servo drive and precision guiding structures, ensuring high positioning accuracy and fast response, guaranteeing the positional accuracy and machining consistency of UAV positioning axis drilling. The auxiliary function module 500 includes cooling, chip removal, and hydraulic assistance structures, cleaning the machining environment, stabilizing clamping and execution, and facilitating efficient and orderly drilling operations. The control system module 600 is equipped with a CAXA... The DNC-2025 CNC system enables multi-module linkage, program editing, and fault diagnosis, precisely controlling the entire drilling process while maintaining stability and compatibility to ensure machining accuracy and efficiency. The speed transmission module 220 includes a 22.4kW vector drive spindle motor, which connects to the hollow spindle 230 via a gearbox to achieve speed change and torque amplification, ensuring stable power transmission and adapting to the different cutting speed requirements of UAV positioning axis drilling. The positioning plate 260 is made by 3D printing metal technology to create two halves of the structure, then assembling the corresponding structures inside, and finally combining the two halves with the assembly structure through threaded or pin connections. The specific implementation method depends on the specific printing material and installation method, and requires corresponding custom processing.

[0036] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0037] The above-described embodiments are merely illustrative of several implementations of the present invention, and while the descriptions are specific and detailed, they should not be construed as limiting the scope of the invention. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of the present invention, and these modifications and improvements all fall within the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be determined by the appended claims.

Claims

1. A CNC machine tool for adaptive clamping of unmanned aerial vehicle (UAV) positioning axis drilling production, comprising a bed (100), a spindle module (200), a turret module (300), a feed and motion module (400), an auxiliary function module (500), and a control system module (600), characterized in that, The bed (100) serves as the mounting base, the spindle module (200) provides cutting power, the turret module (300) carries the cutting tool, the feed and motion module (400) drives the corresponding cutting tool to achieve precise movement, the auxiliary function module (500) ensures machining, and the control system module (600) provides overall control. The spindle module (200) includes a spindle box (210) installed inside the bed (100). A speed transmission module (220) is installed inside the spindle box (210). A hollow spindle (230) is installed in the drive part of the speed transmission module (220). A hydraulic chuck (240) is fixedly connected to the drive part of the hollow spindle (230). An electric cylinder (250) is fixedly connected to the vertical inner wall of the spindle box (210). The end of the output shaft of the electric cylinder (250) passes through the hollow spindle (230) and extends into the interior of the hydraulic chuck (240). A positioning plate (260) is rotatably connected to the end of the output shaft of the electric cylinder (250). A positioning module (270) is installed inside the positioning plate (260).

2. The CNC machine tool for drilling positioning axes of adaptive clamping UAVs according to claim 1, characterized in that, The positioning disk (260) has an internal mounting cavity (261). Two guide cavities (262) are located on the end of the positioning disk (260) facing away from the electric cylinder (250), both communicating with the mounting cavity (261). The positioning module (270) includes a micro servo motor (271), which is fixedly connected to the inside of the mounting cavity (261). A torque sensor (272) is fixedly connected to the end of the output shaft of the micro servo motor (271), and a bidirectional drive assembly (273) is fixedly connected to the end of the output shaft of the torque sensor (272). The two output shafts of the bidirectional drive assembly (273) respectively penetrate into the two guide cavities. Inside the bidirectional drive assembly (262), the two output shafts of the bidirectional drive assembly (273) are rotatably connected to threaded columns (274) that are rotatably connected to the adjacent guide cavity (262). The surface of the threaded column (274) is threadedly connected to a threaded sleeve (275) that is slidably connected to the guide cavity (262). The end of the threaded sleeve (275) facing away from the micro servo motor (271) is fixedly connected to a clamping member (276). An electrical rotary joint (277) is embedded between the electric cylinder (250) and the positioning plate (260). The micro servo motor (271) and the torque sensor (272) are both wiredly connected to the control system module (600) through the electrical rotary joint (277).

3. The CNC machine tool for drilling positioning axes of adaptive clamping UAVs according to claim 2, characterized in that, The clamping member (276) includes a mounting post (2761), which is fixedly connected to one end of the threaded sleeve (275) facing away from the micro servo motor (271). The end of the mounting post (2761) facing the center line of the positioning disk (260) is fixedly connected to a clamping plate (2762), and the two clamping plates (2762) are staggered.

4. The CNC machine tool for drilling positioning axes of adaptive clamping UAVs according to claim 3, characterized in that, The vertical cross-sectional shape of the clamping plate (2762) is arc-shaped, and the arc opening of the clamping plate (2762) faces the axis of the positioning disk (260).

5. The CNC machine tool for drilling positioning axes of adaptive clamping UAVs according to claim 2, characterized in that, The positioning disk (260) has two cavities (263) inside, each of which is connected to the adjacent guide cavity (262). The positioning module (270) also includes two protective components (278). The protective component (278) includes an annular sealing strip (2781) that is slidably connected inside the annular cavity (263). The surface of the annular sealing strip (2781) has a through hole (2782) that is fixedly connected to the threaded sleeve (275). The end of the annular sealing strip (2781) facing away from the micro servo motor (271) is flush with the end of the positioning disk (260) facing away from the electric cylinder (250).

6. The CNC machine tool for drilling positioning axes of adaptive clamping UAVs according to claim 5, characterized in that, The positioning disk (260) has two sets of guide channels (264) inside, which are respectively connected to the adjacent loop cavity (263). The vertical cross-sectional shape of the loop cavity (263) and the guide channel (264) are both matching rounded loop shapes. The guide shaft (2783) is embedded in the annular sealing strip (2781), and the end of the guide shaft (2783) extends into the interior of the guide channel (264).

7. The CNC machine tool for drilling positioning axes of adaptive clamping UAVs according to claim 6, characterized in that, The number of guide shafts (2783) is not less than ten, and the center line of the guide shaft (2783) is offset perpendicular to the center line of the threaded column (274).

8. The CNC machine tool for drilling positioning axes of adaptive clamping UAVs according to claim 6, characterized in that, Each group of guide channels (264) consists of two channels, with two adjacent guide channels (264) symmetrically distributed on both sides of the loop cavity (263). The two ends of the guide shaft (2783) penetrate into the interior of the adjacent guide channels (264).

9. The CNC machine tool for drilling positioning axes of adaptive clamping UAVs according to claim 6, characterized in that, Both ends of the guide shaft (2783) are semi-circular, and the semi-circular part of the guide shaft (2783) is located inside the adjacent guide channel (264).

10. The CNC machine tool for drilling positioning axes of adaptive clamping UAVs according to claim 1, characterized in that, The hollow inner wall of the hydraulic chuck (240) is provided with a guide groove (241) parallel to the axis of the hydraulic chuck (240), and a guide block (280) fixedly connected to the positioning plate (260) is slidably connected inside the guide groove (241).

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