Numerical control processing machine tool for light-weight composite material track

Abstract

This invention discloses a CNC machine tool for lightweight composite material tracks, belonging to the field of machine tool processing technology. It includes a CNC drive device with drive mechanisms on both sides, and support mechanisms symmetrically arranged on one side of each drive mechanism. The outer surfaces of both support mechanisms are equipped with creep indexing mechanisms for fixing the composite material track and suppressing its viscoelastic shear creep. By setting up creep indexing mechanisms, this invention utilizes resistance elements to gradually contact and compress the surface of the composite material track, and enhances contact friction through friction grooves. This allows the composite material track to be continuously tractioned and constrained during processing, thereby reducing micro-elastic indentations and micro-slippage caused by shear creep due to elasticity and viscoelasticity, reducing the deviation between the driving displacement and the actual circumferential displacement of the composite material track, and improving the indexing stability during processing.

Description

Technical Field

[0001] This invention relates to the field of machine tool processing technology, and in particular to a CNC machine tool for lightweight composite material tracks. Background Technology

[0002] Lightweight composite material tracks typically use rubber or polyurethane as the matrix and are composited with fiber cord layers, and the matrix material has significant viscoelastic properties. When CNC milling, drilling, or grinding such composite material tracks, existing CNC machining tools usually use a tensioning wheel in conjunction with a friction drive roller to achieve the feeding and positioning of the composite material track, that is, relying on the friction between the drive roller and the contact surface of the composite material track to transmit circumferential power.

[0003] Because composite material tracks possess elasticity and the viscoelasticity of the rubber matrix, under tangential cutting impact loads, the drive contact area is prone to micro-elastic indentations, shear creep, and micro-slippage. This causes a deviation between the rotational displacement of the drive mechanism and the actual circumferential displacement of the composite material track, leading to a gradual accumulation of pitch error. Simply increasing the clamping force to improve frictional constraint can easily exacerbate the local deformation and creep of the composite material track. Furthermore, the fixed contact structure is difficult to adapt to changes in the track surface shape. Therefore, this application provides a CNC machining tool for lightweight composite material tracks to meet this requirement. Summary of the Invention

[0004] The purpose of this application is to provide a CNC machine tool for lightweight composite material tracks, which can effectively solve the problems mentioned in the background art.

[0005] To achieve the above objectives, this application provides the following technical solution: a CNC machining tool for lightweight composite material tracks, including a CNC drive device, a drive mechanism is provided on both sides of the CNC drive device, a support mechanism is symmetrically provided on one side of each drive mechanism, and a creep indexing mechanism for fixing the composite material track to suppress the viscoelastic shear creep of the composite material track is provided on the outer surface of both support mechanisms. The peristaltic indexing mechanism includes an abutment component and a drive component. The drive component is sleeved on the outer surface of the support mechanism, and the abutment component is nested outside the drive component. The abutment component is configured to rotate under the drive of the drive component and gradually squeeze and pull the composite material track, so that the composite material track remains taut and positioned during CNC drive device processing.

[0006] The driving mechanism includes a first support frame, a second support frame is provided on the inner wall of the first support frame, a limit block is provided on one side of the second support frame, and a slide rail is slidably installed inside the limit block. A telescopic rod is provided inside the second support frame, one end of the telescopic rod is fixedly connected to one end of the slide rail, and the telescopic rod is configured to drive the slide rail to slide inside the limit block by its own extension and retraction, so as to move the support mechanism to the processing area of ​​the composite material track.

[0007] The support mechanism includes a mounting frame and a drive motor. The mounting frame is fixedly installed on one side of the slide rail. Both sides of the inner wall of the mounting frame are provided with rails. Both rails are inclined at 45 degrees. Both rails are provided with drive sliders inside. Both drive sliders are provided with a gear shaft inside. The outer surface of the gear shaft is provided with a plurality of gears distributed at equal intervals. One end of the gear shaft passes through the rail and is fixedly connected to the output end of the drive motor.

[0008] The drive assembly includes a mounting ring, with sleeve shafts on both sides of the inner wall of the mounting ring. A plurality of resistance fins arranged in a circular array are provided in the middle of the inner cavity of the mounting ring. A resistance spring is provided on one side of each resistance fin. The sleeve shafts are rotatably mounted on the outer surface of the gear shaft, and the resistance fins cooperate with the gears on the surface of the gear shaft so that when the gear shaft rotates, the mounting ring is driven to rotate through the contact between the gears and the resistance fins.

[0009] The mounting ring has an inner groove on its outer surface, the inner groove being at an angle greater than 180 degrees, a stop block inside the inner groove, and symmetrical collars on its outer surface.

[0010] The contact component includes a resistance element, and two limiting rings are symmetrically arranged on the inner wall of the resistance element. The limiting rings are sleeved on the outer surface of the collar to provide rotational support for the resistance element. The inner wall of the resistance element has an installation groove, and a spring is arranged inside the installation groove and the inner groove.

[0011] The mounting groove is equipped with a slider, and the spring abuts between the slider and the stop, so that when the resistance component is subjected to resistance, the slider compresses the spring, and the elasticity of the spring adjusts the compressive force of the resistance component on the composite material track.

[0012] The outer surface of the resistance component is provided with several friction grooves. The resistance component is in the shape of an open C, and one end of the resistance component is wider than the other end, so that the resistance component gradually abuts against and squeezes the composite material track when the mounting ring rotates.

[0013] When the gear shaft rotates, the gears on the surface of the gear shaft periodically abut and squeeze the resistance fins, causing the resistance fins to squeeze the resistance spring. After the resistance spring reaches its contraction limit, the gears disengage from the resistance fins, allowing the gear shaft to rotate freely relative to the mounting ring.

[0014] The resistance element is provided in several parts and is distributed at equal intervals along the surface of the composite material track. Under the elastic action of the spring, the resistance element abuts against the surface of the composite material track, so as to adapt to the shape of the surface of the composite material track and adjust the squeezing force on the composite material track by the abutting of different resistance elements.

[0015] In summary, the technical effects and advantages of this invention are as follows: This invention, by setting up a creeping indexing mechanism, utilizes resistance components to gradually contact and squeeze the surface of the composite material track, and enhances the contact friction through friction grooves, so that the composite material track is subjected to continuous traction and constraint during processing. This reduces the micro-slippage caused by micro-elastic indentation and shear creep of the composite material track due to elasticity and viscoelasticity, reduces the deviation between the driving displacement and the actual circumferential displacement of the composite material track, reduces the cumulative pitch error, and improves the indexing stability during processing.

[0016] This invention provides a spring, a slider, and a stop between the contact component and the drive component. This allows the resistance component to be elastically adjusted by the spring when subjected to the reaction force of the composite material track. This maintains effective contact between the resistance component and the composite material track while reducing excessive local pressure caused by rigid compression, thereby reducing local deformation and shear creep of the composite material track.

[0017] This invention adjusts the contact position of the creeping indexing mechanism through a driving mechanism and a supporting mechanism, and uses multiple equally spaced resistance elements to contact the surface of the composite material track. With the elastic adjustment of the spring, the resistance elements can adapt to the shape changes of the composite material track surface, thereby improving the contact stability and stress adaptability between the resistance elements and the composite material track. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in the embodiments of this application 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 only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0019] Figure 1 A first-view three-dimensional structural diagram of a CNC machine tool for manufacturing a lightweight composite material track; Figure 2A second-view three-dimensional structural diagram of a CNC machine tool for manufacturing lightweight composite material tracks; Figure 3 A schematic diagram of a partial three-dimensional connection structure of a CNC machine tool for a lightweight composite material track; Figure 4 A schematic diagram of the three-dimensional connection structure between the drive mechanism and the support mechanism; Figure 5 A schematic diagram of the three-dimensional connection structure of the drive mechanism; Figure 6 A first-view three-dimensional connection structure diagram of the support mechanism and the peristaltic indexing mechanism; Figure 7 A schematic diagram of the three-dimensional connection structure of the peristaltic indexing mechanism and the support mechanism from a second perspective. Figure 8 A schematic diagram of the three-dimensional connection structure of the supporting mechanism; Figure 9 This is a schematic diagram of the three-dimensional connection structure of the peristaltic indexing mechanism; Figure 10 A first-person perspective three-dimensional connection structure diagram of the driving component; Figure 11 A schematic diagram of the three-dimensional connection structure of the opposing components; Figure 12 A sectional view of the three-dimensional connection structure of the opposing components; Figure 13 A schematic diagram of the second-view stereo connection structure of the driving component; Figure 14 A sectional view of the three-dimensional connection structure of the driving component; Figure 15 A schematic diagram of the three-dimensional connection structure between the drive assembly and the gear shaft; Figure 16 This is a schematic diagram of the three-dimensional connection structure of the resistance fins and the resistance spring.

[0020] In the diagram: 1. CNC drive device; 2. Drive mechanism; 21. First support frame; 22. Slide rail; 23. Limiting block; 24. Telescopic rod; 25. Second support frame; 3. Support mechanism; 31. Mounting frame; 32. Drive motor; 33. Rail; 34. Gear shaft; 35. Drive slider; 4. Creep indexing mechanism; 41. Contact assembly; 411. Resistance component; 412. Friction groove; 413. Limiting ring; 414. Slider; 415. Mounting groove; 42. Drive assembly; 421. Spring; 422. Mounting ring; 423. Collar; 424. Sleeve shaft; 425. Stop block; 426. Inner groove; 427. Resistance fin; 428. Resistance spring. Detailed Implementation

[0021] 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, and 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.

[0022] Example 1, Reference Figures 1 to 16 The CNC machining tool for lightweight composite material tracks shown includes a CNC drive device 1. Drive mechanisms 2 are provided on both sides of the CNC drive device 1. Support mechanisms 3 are symmetrically provided on one side of each drive mechanism 2. The outer surface of each support mechanism 3 is provided with a creep indexing mechanism 4 for fixing the composite material track and suppressing viscoelastic shear creep. The creep indexing mechanism 4 includes an abutment component 41 and a drive component 42. The drive component 42 is sleeved on the outer surface of the support mechanism 3, and the abutment component 41 is nested outside the drive component 42. The abutment component 41 is configured to rotate under the drive of the drive component 42 and gradually squeeze and pull the composite material track, so that the composite material track remains taut and positioned during machining by the CNC drive device 1.

[0023] It is worth noting that the CNC drive device 1 is a cutting device on the machine tool for milling, drilling or grinding composite material tracks. The drive mechanism 2 is provided in two sets, and the two sets of drive mechanisms 2 are respectively set on both sides of the CNC drive device 1. Each drive mechanism 2 has a support mechanism 3 symmetrically arranged on one side. Each support mechanism 3 has a creep indexing mechanism 4 on its outer surface. The creep indexing mechanism 4 is used to fix the composite material track during processing and to suppress the micro-elastic indentation and shear creep caused by the viscoelasticity of the rubber matrix of the composite material track.

[0024] The peristaltic indexing mechanism 4 includes an abutment component 41 and a drive component 42. The drive component 42 is sleeved on the outer surface of the support mechanism 3, and the abutment component 41 is nested outside the drive component 42.

[0025] During operation, the drive assembly 42 provides rotational power to the abutment assembly 41, which abuts against the surface of the composite material track and gradually squeezes and pulls it, keeping the section of the composite material track to be processed below the CNC drive device 1 taut, thereby ensuring that the composite material track does not undergo micro-yield or pitch shift during the cutting process.

[0026] In embodiment 2, the drive mechanism 2 includes a first support frame 21, a second support frame 25 is provided on the inner wall of the first support frame 21, a limit block 23 is provided on one side of the second support frame 25, and a slide rail 22 is slidably installed inside the limit block 23. A telescopic rod 24 is provided inside the second support frame 25, and one end of the telescopic rod 24 is fixedly connected to one end of the slide rail 22. The telescopic rod 24 is configured to drive the slide rail 22 to slide inside the limit block 23 by its own extension and retraction, so as to move the creeping indexing mechanism 4 to the processing area of ​​the composite material track.

[0027] It is worth noting that during operation, the telescopic rod 24 extends and retracts. The extended end of the telescopic rod 24 pushes the slide rail 22 to slide back and forth in a straight line inside the limiting block 23. The limiting block 23 constrains the sliding direction of the slide rail 22 to prevent the slide rail 22 from swaying during movement. The slide rail 22 then drives the support mechanism 3 fixed to it to move as a whole, thereby conveying the creeping indexing mechanism 4 to the processing area of ​​the composite material track, or retracting the creeping indexing mechanism 4 after processing. The telescopic rod 24 can be an electric push rod, a cylinder, or a hydraulic cylinder. This embodiment does not make specific limitations.

[0028] In embodiment 3, the support mechanism 3 includes a mounting frame 31 and a drive motor 32. The mounting frame 31 is fixedly mounted on one side of the slide rail 22. Both sides of the inner wall of the mounting frame 31 are provided with rails 33, which are set at a 45-degree inclination angle. Both rails 33 are provided with drive sliders 35 inside. Both drive sliders 35 are provided with a gear shaft 34 inside. The outer surface of the gear shaft 34 is provided with a number of gears distributed at equal intervals. One end of the gear shaft 34 passes through the rail 33 and is fixedly connected to the output end of the drive motor 32. The drive motor 32 is slidably mounted on one side of the mounting frame 31 through a limit block. The drive slider 35 is configured to slide along the 45-degree inclination rail 33 and drive the gear shaft 34 and the creeping indexing mechanism 4 to synchronously approach the processing position of the CNC drive device 1.

[0029] It is worth noting that the mounting bracket 31 is fixedly installed on one side of the slide rail 22, so that the support mechanism 3 moves synchronously with the slide rail 22. The inner walls of the mounting bracket 31 are provided with rails 33 on both sides. The two rails 33 are set at a 45-degree angle, that is, the extension direction of the rails 33 is inclined at 45 degrees relative to the horizontal direction. The interior of the two rails 33 is provided with drive sliders 35. The gear shaft 34 passes through the interior of the two drive sliders 35, so that the two ends of the gear shaft 34 are supported by the two drive sliders 35 respectively. The outer surface of the gear shaft 34 is provided with several gears that are evenly spaced. One end of the gear shaft 34 passes through the track 33 and is fixedly connected to the output end of the drive motor 32. The drive motor 32 provides rotational power. The drive motor 32 is slidably mounted on one side of the mounting bracket 31 through a limit block, so that the drive motor 32 can move synchronously with the gear shaft 34.

[0030] Since the track 33 is set at a 45-degree inclination angle, when the drive slider 35 slides along the track 33, the gear shaft 34 simultaneously generates a combined displacement in the horizontal and vertical directions. On the one hand, it drives the creeping indexing mechanism 4 to move closer to the surface of the composite material track, and on the other hand, it drives the creeping indexing mechanism 4 to move closer to the processing position of the CNC drive device 1, so that the contact position of the contact component 41 is closer to the actual processing position of the surface of the composite material track, thereby forming local tension near the processing area. The spacing between adjacent gears on the gear shaft 34 is adapted to the distribution spacing of the resistance fins 427 in the drive component 42.

[0031] In embodiment four, the drive assembly 42 includes a mounting ring 422. A sleeve shaft 424 is provided on both sides of the inner wall of the mounting ring 422. A plurality of resistance fins 427 arranged in a circular array are provided in the middle of the inner cavity of the mounting ring 422. A resistance spring 428 is provided on one side of each resistance fin 427. The sleeve shaft 424 is rotatably mounted on the outer surface of the gear shaft 34. The resistance fins 427 and gears provided on the surface of the gear shaft 34 engage with each other. The gear shaft 34 is configured to drive the mounting ring 422 to rotate around the gear shaft 34 by the gears cyclically contacting the resistance fins 427.

[0032] The outer surface of the mounting ring 422 is provided with an inner groove 426, the angle of which the inner groove 426 is greater than 180 degrees, and a stop block 425 is provided inside the inner groove 426. The outer surface of the mounting ring 422 is symmetrically provided with collars 423, which are configured to provide rotational guidance for the abutment component 41.

[0033] It is worth noting that when the gear shaft 34 rotates continuously, the gear on its surface cyclically presses against the resistance fin 427. After being pressed by the gear, the resistance fin 427 compresses the resistance spring 428, causing it to contract. When the contact force between the gear and the resistance fin 427 reaches the contraction limit of the resistance spring 428, the resistance fin 427 retracts, allowing the gear to pass over the resistance fin 427. The gear disengages from the resistance fin 427 and spins freely. Subsequently, the gear re-engages with the next resistance fin 427 and enters the next round of pressing.

[0034] Through the intermittent engagement between the gear and the resistance fin 427, which involves "meshing, contacting, yielding, disengaging, and re-meshing", the mounting ring 422 obtains intermittent rotational power and causes the resistance component 411 linked to it to press the composite material track with a constant maximum contact force, thus preventing the contact force from continuously increasing and damaging the surface of the composite material track.

[0035] In embodiment 5, the abutment component 41 includes a resistance member 411. Two limiting rings 413 are symmetrically arranged on the inner wall of the resistance member 411, and the limiting rings 413 are sleeved on the outer surface of the collar 423 to assist the rotation of the resistance member 411. The inner wall of the resistance member 411 is provided with a mounting groove 415. A spring 421 is provided inside the mounting groove 415 and the inner groove 426. A slider 414 is provided inside the mounting groove 415, and the spring 421 abuts against the slider 414 and the stop block 425.

[0036] The outer surface of the resistance member 411 is provided with a number of friction grooves 412 that are evenly distributed. The friction grooves 412 are configured to increase the friction between the resistance member 411 and the surface of the composite material track. The resistance member 411 is in the shape of an open C, and the width of one end of the resistance member 411 is greater than that of the other end. The resistance member 411 is configured to gradually squeeze and pull the composite material track by using the C-shaped structure with gradually changing width when it rotates with the mounting ring 422.

[0037] When the gear shaft 34 rotates continuously, the gear on the surface of the gear shaft 34 cyclically presses against the resistance fin 427. After being pressed by the gear, the resistance fin 427 compresses the resistance spring 428 to contract. When the contact force between the gear and the resistance fin 427 reaches the contraction limit of the resistance spring 428, the gear and the resistance fin 427 disengage and spin freely, and enter the next round of pressing the resistance fin 427, so that the resistance component 411 presses the composite material track with a constant maximum contact force.

[0038] When the resistance component 411 is subjected to the reaction force of the composite material track surface, it drives the limiting ring 413 to slide on the outer surface of the collar 423. The resistance component 411 simultaneously drives the slider 414 to squeeze the spring 421. The spring 421 abuts against the stop block 425 to generate elastic buffer, so that the resistance component 411 can adaptively adjust the force of squeezing the composite material track according to the surface shape of the composite material track.

[0039] The 45-degree tilt angle of the track 33 is configured so that when the drive slider 35 drives the gear shaft 34, drive assembly 42 and contact assembly 41 to move, they move synchronously toward the processing position of the CNC drive device 1. This causes the C-shaped resistance member 411 to gradually squeeze and pull the composite material track on both sides of the processing area of ​​the CNC drive device 1, thereby suppressing the micro-elastic indentation and shear creep of the composite material track caused by the viscoelasticity of rubber.

[0040] It is worth noting that the resistance component 411 is an actuator that directly acts on the surface of the composite material track by the abutment component 41. The limiting ring 413 and the collar 423 are rotatably engaged to assist the resistance component 411 in rotating relative to the mounting ring 422 and to axially limit the resistance component 411, preventing the resistance component 411 from moving axially along the gear shaft 34 during rotation.

[0041] The inner wall of the resistance member 411 is provided with a mounting groove 415. The mounting groove 415 corresponds to the inner groove 426 on the mounting ring 422 and together encloses a cavity to accommodate the spring 421. The spring 421 is simultaneously disposed inside the mounting groove 415 and the inner groove 426. The mounting groove 415 is provided with a slider 414. A spring 421 abuts against the slider 414 and the stop 425. That is, one end of the spring 421 elastically abuts against the resistance member 411 through the slider 414, and the other end abuts against the stop 425 in the inner groove 426. Thus, the resistance member 411 has an elastic floating degree of freedom relative to the mounting ring 422 in the abutting direction.

[0042] The outer surface of the resistance member 411 is provided with a plurality of friction grooves 412 distributed at equal intervals. The friction grooves 412 are used to increase the contact friction between the outer surface of the resistance member 411 and the surface of the composite material track, so that the resistance member 411 does not slip when it comes into contact with or pulls the composite material track. In an optional embodiment, the cross-sectional shape of the friction grooves 412 can be rectangular, arc-shaped, or V-shaped, all of which can achieve the effect of increasing friction.

[0043] The resistance element 411 is in the shape of an open C, and the width of one end of the resistance element 411 is greater than that of the other end. That is, the resistance element 411 has a gradually changing width structure along the circumference. When the resistance element 411 rotates with the mounting ring 422, the gradually changing width C-shaped structure contacts the surface of the composite material track in sequence, so that the contact area and contact force gradually increase, thereby realizing the gradual compression and pulling of the composite material track and avoiding instantaneous rigid contact that causes indentations on the surface of the composite material track.

[0044] The adaptive voltage regulation process is as follows: When there are uneven thickness, curvature changes, or pattern protrusions on the surface of the composite material track, the resistance element 411 is subjected to the reaction force of the surface of the composite material track. This reaction force causes the limiting ring 413 to slide on the outer surface of the collar 423. The resistance element 411 simultaneously drives the slider 414 to squeeze the spring 421. The spring 421 is compressed and abuts against the stop block 425 to generate elastic buffer. When the surface reaction force decreases, the spring 421 rebounds and pushes the resistance element 411 to reset.

[0045] Through the elastic cooperation of spring 421, slider 414 and stop 425, the resistance component 411 can adaptively adjust the force of squeezing the composite material track according to the actual surface shape of the composite material track, so that composite material tracks of different specifications and surface shapes can obtain uniform and appropriate tension and resistance force. Since the opening angle of the inner groove 426 is greater than 180 degrees, spring 421 and slider 414 have sufficient circumferential floating stroke inside.

[0046] The working process of this invention is as follows: When processing composite tracks, because composite tracks are elastic and the viscoelasticity of their rubber matrix is ​​an intrinsic property of the material, as long as friction transmission is relied upon, shear creep at the contact interface is unavoidable. Increasing pressure, friction coefficient, roller diameter, or speed will trigger another negative mechanism. The cutting tangential impact load superimposed on the viscoelastic characteristics of the rubber matrix will cause micro-elastic indentation and shear creep in the rubber of the contact area, resulting in a mismatch between the drive component rotation angle and the actual circumferential displacement of the composite track. Moreover, this micro-slippage is not macro-slippage. Increasing the clamping force will instead exacerbate the permanent deformation and creep of the rubber, ultimately leading to the concentrated amplification of the pitch cumulative error at the joint between the beginning and end.

[0047] To this end, the CNC drive device 1 is first moved to the area to be processed at the upper end of the composite material track by the drive mechanism 2. The telescopic rod 24 extends and retracts, causing the slide rail 22 to slide inside the limit block 23. The slide rail 22 drives the mounting frame 31 to move, moving the two mounting frames 31 to both sides of the CNC drive device 1.

[0048] Based on the thickness and processing position of the composite material track, the drive slider 35 slides inside the 45-degree inclined track 33, driving the gear shaft 34 to move. The gear shaft 34 simultaneously drives the drive motor 32 to move. As the gear shaft 34 moves, the mounting ring 422 drives the resistance member 411 to move and abut against the surface of the composite material track. Since the track 33 is at a 45-degree inclination angle, the resistance member 411 moves towards the position of the CNC drive device 1 while displacing, making it closer to the actual processing position on the surface of the composite material track.

[0049] The drive motor 32 drives its output end to rotate, which in turn drives the gear shaft 34 to rotate. The gear on the surface of the gear shaft 34 abuts against the surface of the resistance fin 427. After the resistance fin 427 is subjected to force, it drives the mounting ring 422 to rotate. The sleeve shaft 424 is sleeved on the surface of the gear shaft 34 to assist the rotation of the mounting ring 422. The rotation of the mounting ring 422 drives the resistance element 411 to rotate, and the resistance element 411 abuts against the surface of the composite material track.

[0050] The resistance element 411, which is C-shaped with one end wider than the other, gradually presses against the surface of the composite material track as it rotates, and pulls the composite material track. This prevents the composite material track from undergoing micro-elastic indentation and shear creep due to the material properties during the processing of the CNC drive device 1. The friction grooves 412, which are equally spaced on the surface of the resistance element 411, simultaneously increase its surface friction.

[0051] The gear shaft 34 rotates continuously, and the gear squeezes and contacts the resistance fin 427. The resistance fin 427 compresses the resistance spring 428 to contract. When the contact force between the gear and the resistance fin 427 reaches the contraction limit of the resistance spring 428, the gear and the resistance fin 427 disengage and spin freely, and enter the next round of squeezing the resistance fin 427, so that the resistance component 411 presses the composite material track with the maximum constant contact force.

[0052] When the resistance component 411 is subjected to force, it causes the limiting ring 413 to slide on the outer surface of the collar 423. At the same time, the resistance component 411 causes the slider 414 to compress the spring 421. The spring 421 abuts against the stop block 425, thereby adjusting the force of the resistance component 411 compressing the composite material track. Because several resistance components 411 are distributed at equal intervals and abut against the surface of the composite material track, the machine tool can adapt to the different extrusion pressure requirements caused by different surface shapes of the composite material track.

[0053] After the current section is processed, the drive slider 35 slides in the opposite direction along the track 33 to disengage the resistance component 411 from the composite material track. The telescopic rod 24 drives the slide rail 22 and the support mechanism 3 to move. After the composite material track is fed circumferentially by one pitch, the above process is repeated until the entire circumference of the composite material track is processed.

[0054] Finally, it should be noted that the above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A CNC machine tool for manufacturing lightweight composite material tracks, characterized in that: The system includes a CNC drive device (1), with a drive mechanism (2) on both sides of the CNC drive device (1), and a support mechanism (3) symmetrically arranged on one side of each drive mechanism (2). The outer surfaces of the two support mechanisms (3) are provided with a creep indexing mechanism (4) for fixing the composite material track to suppress the viscoelastic shear creep of the composite material track. The peristaltic indexing mechanism (4) includes an abutment component (41) and a drive component (42). The drive component (42) is sleeved on the outer surface of the support mechanism (3). The abutment component (41) is nested outside the drive component (42). The abutment component (41) is configured to rotate under the drive of the drive component (42) and gradually squeeze and pull the composite material track, so that the composite material track remains taut and positioned during the CNC drive device (1) processing.

2. The CNC machining tool for lightweight composite material tracks according to claim 1, characterized in that: The drive mechanism (2) includes a first support frame (21), and a second support frame (25) is provided on the inner wall of the first support frame (21). A limit block (23) is provided on one side of the second support frame (25), and a slide rail (22) is slidably installed inside the limit block (23). A telescopic rod (24) is provided inside the second support frame (25). One end of the telescopic rod (24) is fixedly connected to one end of the slide rail (22). The telescopic rod (24) is configured to drive the slide rail (22) to slide inside the limit block (23) by its own extension and retraction, so as to move the support mechanism (3) to the processing area of ​​the composite material track.

3. The CNC machining tool for lightweight composite material tracks according to claim 2, characterized in that: The support mechanism (3) includes a mounting frame (31) and a drive motor (32). The mounting frame (31) is fixedly installed on one side of the slide rail (22). The inner walls of the mounting frame (31) are provided with rails (33) on both sides. The two rails (33) are inclined at 45 degrees. The interior of the two rails (33) is provided with a drive slider (35). The interior of the two drive sliders (35) is provided with a gear shaft (34). The outer surface of the gear shaft (34) is provided with a number of gears distributed at equal intervals. One end of the gear shaft (34) passes through the rail (33) and is fixedly connected to the output end of the drive motor (32).

4. The CNC machining tool for lightweight composite material tracks according to claim 3, characterized in that: The drive assembly (42) includes a mounting ring (422), and sleeve shafts (424) are provided on both sides of the inner wall of the mounting ring (422). Several resistance fins (427) arranged in a ring array are provided in the middle of the inner cavity of the mounting ring (422). A resistance spring (428) is provided on one side of the resistance fins (427). The sleeve shafts (424) are rotatably mounted on the outer surface of the gear shaft (34), and the resistance fins (427) and the gears on the surface of the gear shaft (34) cooperate with each other so that when the gear shaft (34) rotates, the mounting ring (422) is driven to rotate through the contact between the gears and the resistance fins (427).

5. The CNC machining tool for lightweight composite material tracks according to claim 4, characterized in that: The outer surface of the mounting ring (422) is provided with an inner groove (426), the angle of the inner groove (426) is greater than 180 degrees, a stop block (425) is provided inside the inner groove (426), and a collar (423) is symmetrically provided on the outer surface of the mounting ring (422).

6. The CNC machining tool for a lightweight composite material track according to claim 5, characterized in that: The abutment component (41) includes a resistance element (411). Two limiting rings (413) are symmetrically arranged on the inner wall of the resistance element (411). The limiting rings (413) are sleeved on the outer surface of the collar (423) to provide rotational support for the resistance element (411). The inner wall of the resistance element (411) is provided with an installation groove (415). A spring (421) is provided inside the installation groove (415) and the inner groove (426).

7. A CNC machining tool for lightweight composite material tracks according to claim 6, characterized in that: The mounting groove (415) is provided with a slider (414), and the spring (421) abuts against the slider (414) and the stop (425) so that when the resistance member (411) is subjected to the abutment, the spring (421) is squeezed by the slider (414), and the elasticity of the spring (421) adjusts the squeezing force of the resistance member (411) on the composite material track.

8. A CNC machining tool for lightweight composite material tracks according to claim 7, characterized in that: The outer surface of the resistance member (411) is provided with a plurality of friction grooves (412). The resistance member (411) is in the shape of an open C, and one end of the resistance member (411) is wider than the other end, so that the resistance member (411) gradually abuts against and squeezes the composite material track as the mounting ring (422) rotates.

9. A CNC machining tool for lightweight composite material tracks according to claim 4, characterized in that: When the gear shaft (34) rotates, the gear on the surface of the gear shaft (34) periodically abuts against and squeezes the resistance fin (427), causing the resistance fin (427) to squeeze the resistance spring (428), and after the resistance spring (428) reaches its contraction limit, the gear disengages from the resistance fin (427), so that the gear shaft (34) rotates freely relative to the mounting ring (422).

10. A CNC machining tool for lightweight composite material tracks according to claim 7, characterized in that: The resistance element (411) is provided in a plurality of such elements and is distributed at equal intervals along the surface of the composite material track. The resistance element (411) abuts against the surface of the composite material track under the elastic action of the spring (421) so as to adapt to the shape of the surface of the composite material track and adjust the squeezing force on the composite material track by the abutting of different resistance elements (411).

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