Sanding machine for cylindrical wood processing

Abstract

The invention discloses a sanding machine for cylindrical wood processing, and relates to the technical field of cylindrical wood grinding, the sanding machine comprises a sanding bottom frame, a clamping rotating assembly, a moving assembly and a grinding mechanism, and the clamping rotating assembly is used for driving cylindrical wood to rotate around a first direction; the grinding mechanism comprises a grinding rack, a first sanding wheel and a second sanding wheel, and a first driving assembly and a second driving assembly are arranged on the grinding rack; the first driving assembly is used for driving the first sanding wheel to rotate in the first direction and driving the first sanding wheel to conduct linear feeding in the second direction so that the first sanding wheel can grind the outer surface of the cylindrical wood. The second driving assembly is used for driving the second sanding wheel to rotate in the third direction and driving the second sanding wheel to conduct linear feeding in the second direction and the third direction so that the second sanding wheel can grind the outer surface of the cylindrical wood. The problem that in the prior art, when a sander is used for grinding cylindrical wood, the outer surface of the cylindrical wood is ground unevenly is solved.

Description

Technical Field

[0001] This invention relates to the field of cylindrical wood grinding technology, and more particularly to a sander for processing cylindrical wood. Background Technology

[0002] A sander, also known as a grinder, is a mechanical device that uses tools such as sanding belts, grinding wheels, or sanding discs to grind, polish, and finish the surface of a workpiece. Its core purpose is to remove unevenness, burrs, and old coatings from the surface of materials, or to achieve a specific smoothness, roughness, and shape.

[0003] In existing technologies, cylindrical wood requires surface grinding during production to facilitate subsequent processing. However, traditional sanders, which primarily use flat sanding, struggle to effectively contact the entire surface due to the curvature of the cylinder. Using flat sanding belts or blocks only achieves line or point contact, easily resulting in a polygonal or wavy uneven surface.

[0004] It is evident that existing sanders suffer from uneven grinding of the outer surface of cylindrical wood when grinding it. Summary of the Invention

[0005] The purpose of this invention is to provide a sander for processing cylindrical wood, which solves the problem of uneven grinding of the outer surface of cylindrical wood when sanders in the prior art are used for grinding cylindrical wood.

[0006] To achieve this objective, the present invention adopts the following technical solution: A sander for processing cylindrical wood includes a sanding base, a clamping and rotating assembly, a moving assembly, and a grinding mechanism. The clamping and rotating assembly is used to clamp cylindrical wood arranged along a first direction and drive it to rotate around the first direction. The moving assembly is used to drive the grinding mechanism to move along the first direction on the sanding base. The grinding mechanism includes a grinding frame, a first sanding wheel, and a second sanding wheel. The grinding frame is equipped with a first drive assembly and a second drive assembly. The first drive assembly drives the first sanding wheel to rotate around a first direction and feeds it linearly along a second direction, so that the first sanding wheel grinds the outer surface of the cylindrical wood. The second drive assembly drives the second sanding wheel to rotate around a third direction and feeds it linearly along both the second and third directions, so that the second sanding wheel grinds the outer surface of the cylindrical wood.

[0007] Optionally, the first drive assembly includes a first drive platform slidably connected to the grinding machine frame, the first sanding wheel being rotatably connected to one side of the first drive platform, a first drive motor for driving the first sanding wheel to rotate around a first direction being mounted on the first drive platform, and a first drive cylinder for driving the first drive platform to move along a second direction being mounted on the grinding machine frame.

[0008] Optionally, two spaced sliding sleeves are fixedly connected to the grinding machine frame. The first drive table includes a first sliding rod and a mounting rod. The first sliding rod slides through the sliding sleeve. The ends of the first sliding rod and the ends of the mounting rod are alternately welded and fixed to form a quadrilateral structure. The sliding sleeve is located between the two mounting rods. One of the mounting rods is equipped with a mounting base, which is rotatably connected to a rotating shaft arranged along a first direction. The first sanding wheel is fixedly mounted on one end of the rotating shaft. The first drive motor is mounted on the other mounting rod and is used to drive the rotating shaft to rotate. The telescopic rod of the first drive cylinder is fixedly connected to the mounting rod.

[0009] Optionally, the second drive assembly includes a second drive stage, a third drive stage, a second drive motor, and a third drive motor, wherein the second drive stage is slidably connected to the third drive stage, and the third drive stage is slidably connected to the grinding machine frame; The second sanding wheel is rotatably connected to the second drive platform, and the second drive motor is mounted on the second drive platform and is used to drive the second sanding wheel to rotate around a third direction; a second drive cylinder is mounted on the third drive platform to drive the second drive platform to move linearly along a second direction, and a third drive motor is mounted on the grinding machine frame and is used to drive the third drive platform to move linearly along a third direction.

[0010] Optionally, the third drive table is provided with a drive screw that is rotatably connected to the grinding machine frame. The drive screw is arranged along the third direction, and a first driven sprocket is fixedly installed at the end of each drive screw away from the sanding base. The grinding machine frame is rotatably connected to a drive sprocket and a second driven sprocket. The drive sprocket, the two first driven sprockets, and the second driven sprocket are distributed at four corners and are meshed with a transmission chain. The third drive motor is used to drive the drive sprocket to rotate around a third direction, so that the two drive screws drive the third drive table to move synchronously in a third direction.

[0011] Optionally, the number of the third drive stage is set to two, and a second slide rod passing through the second drive stage is fixedly connected between the two third drive stages. Both second slide rods are arranged along the second direction. Two third slide rods corresponding to the two third drive stages are fixedly connected on the grinding machine frame. The third slide rods are arranged along the third direction and correspond one-to-one with the drive screw.

[0012] Optionally, the bottom of the grinding frame is equipped with four rollers distributed at the four corners, and the rollers are in rolling connection with the sanding base frame; The moving component includes a moving motor and a rack. The moving motor is mounted on the grinding machine frame. The output shaft of the moving motor is equipped with a moving gear that meshes with the rack. The rack is arranged along a first direction and fixedly connected to the sanding base. The moving motor is used to drive the moving gear to rotate around a third direction.

[0013] Optionally, the clamping rotation assembly includes a clamping rotation base plate fixedly mounted on the sanding base and arranged along a first direction. The clamping rotation base plate is provided with a first clamping rotation table, a second clamping rotation table, and a rotation motor. The first clamping rotation table is fixedly connected to one end of the clamping rotation base plate, and the second clamping rotation table is spaced apart from the first clamping rotation table and detachably connected to the clamping rotation base plate. A first clamping rotating claw is rotatably connected to the first clamping rotating platform, and a second clamping rotating claw is rotatably connected to the second clamping rotating platform. The first clamping rotating claw and the second clamping rotating claw are respectively inserted into the two ends of the cylindrical wood. The rotary motor is used to drive the first clamping rotating claw to rotate around a first direction.

[0014] Optionally, the sander grinds cylindrical wood using the following method: Step S1: Clamp both ends of the cylindrical wood with the clamping and rotating assembly, and drive it to rotate around the first direction; Step S2: Drive the grinding mechanism to move along the first direction by moving the component, so that the grinding mechanism moves from one end of the cylindrical wood to the other end. Step S3: During the movement of the grinding mechanism, the first sanding wheel is driven by the first driving component to rotate around the first direction and feed linearly along the second direction, so that the first sanding wheel rough grinds the outer surface of the cylindrical wood. Step S4: During the movement of the grinding mechanism, the second sanding wheel is driven by the second drive assembly to rotate around a third direction and feed in a straight line along the second direction and the third direction, so that the second sanding wheel can perform fine grinding on the outer surface of the cylindrical wood. In this process, the rough grinding in step S3 and the fine grinding in step S4 are performed at least partially simultaneously, and the fine grinding in step S4 focuses on compensating for the area of ​​the cylindrical wood after it has been ground by the first sanding wheel or on the targeted grinding of its local concave areas.

[0015] Compared with the prior art, the present invention has the following beneficial effects: This invention provides a sander for processing cylindrical wood. By incorporating a clamping and rotating assembly, a moving assembly, and a grinding mechanism, it achieves uniform grinding of the outer surface of cylindrical wood, automating wood processing and improving processing efficiency. The clamping and rotating assembly stably clamps the cylindrical wood and drives it to rotate around a first direction, ensuring that the entire outer surface of the wood is covered by the grinding mechanism, avoiding the uneven grinding problems caused by point or line contact in traditional flat sanding equipment. The first driving assembly drives the first sanding wheel to rotate around the first direction and feed it linearly along a second direction, performing primary grinding on the outer surface of the cylindrical wood, forming initial uniform contact and effectively removing material unevenness. The second driving assembly drives the second sanding wheel to rotate around a third direction and feed it linearly along both the second and third directions, enabling auxiliary or fine grinding of the outer surface of the cylindrical wood. Multi-directional feeding compensates for curvature changes, further ensuring the smoothness and consistency of the ground surface. Therefore, the present invention solves the problem of uneven grinding of the outer surface of cylindrical wood when sanding with existing sanders. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of the present 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 only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0017] The structures, proportions, sizes, etc., shown in the accompanying drawings of this specification are only for the purpose of assisting those skilled in the art in understanding and reading the content disclosed in the specification, and are not intended to limit the conditions under which the present invention can be implemented. Therefore, they have no substantial technical significance. Any modifications to the structure, changes in the proportions, or adjustments to the size, without affecting the effects and objectives that the present invention can produce, should still fall within the scope of the technical content disclosed in the present invention.

[0018] Figure 1 A three-dimensional structural schematic diagram of a sander for processing cylindrical wood provided in an embodiment of the present invention; Figure 2A three-dimensional structural schematic diagram of the grinding mechanism in a sander for processing cylindrical wood, provided as an embodiment of the present invention; Figure 3 This is a partial structural diagram of the grinding mechanism in a sander for processing cylindrical wood, provided as an embodiment of the present invention. Figure 4 for Figure 1 A magnified structural diagram at point A; Figure 5 This is a three-dimensional structural diagram of a clamping and rotating component in a sander for processing cylindrical wood, provided as an embodiment of the present invention.

[0019] Illustration: 10. Sanding base frame; 20. Clamping rotating assembly; 21. Clamping rotating base plate; 22. First clamping rotating stage; 23. Second clamping rotating stage; 24. Rotary motor; 25. First clamping rotating jaw; 26. Second clamping rotating jaw; 30. Moving component; 31. Moving motor; 32. Rack and pinion; 33. Moving gear; 40. Grinding mechanism; 41. Grinding machine frame; 411. Sliding sleeve; 412. Roller; 42. First sanding wheel; 43. Second sanding wheel; 44. First drive assembly; 441. First drive table; 4411. First slide rod; 4412. Mounting rod; 4413. Mounting base; 4414. Rotating shaft; 442. First drive motor; 443. First drive cylinder; 45. Second drive assembly; 4501. Second drive table; 4502. Third drive table; 4503. Second drive motor; 4504. Third drive motor; 4505. Second drive cylinder; 4506. Drive screw; 4507. First driven sprocket; 4508. Drive sprocket; 4509. Second driven sprocket; 4510. Second slide rod; 4511. Third slide rod; 4512. Transmission chain; 100. Cylindrical timber. Detailed Implementation

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

[0021] In the description of this invention, it should be understood that the terms "upper," "lower," "top," "bottom," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing the invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the invention. It should be noted that when a component is considered to be "connected" to another component, it can be directly connected to the other component or there may be a component positioned centrally in the connection.

[0022] The technical solution of the present invention will be further described below with reference to the accompanying drawings and specific embodiments.

[0023] This invention provides a sander for processing cylindrical wood 100, such as... Figures 1 to 5 As shown, it includes a sanding base 10, a clamping and rotating assembly 20, a moving assembly 30, and a grinding mechanism 40. The clamping and rotating assembly 20 is used to clamp a cylindrical piece of wood 100 arranged along a first direction and drive it to rotate around the first direction. The moving assembly 30 is used to drive the grinding mechanism 40 to move along the first direction on the sanding base 10. The grinding mechanism 40 includes a grinding frame 41, a first sanding wheel 42, and a second sanding wheel 43. The grinding frame 41 is equipped with a first drive assembly 44 and a second drive assembly 45. The first drive assembly 44 drives the first sanding wheel 42 to rotate around a first direction and feeds it linearly along a second direction, so that the first sanding wheel 42 grinds the outer surface of the cylindrical wood 100. The second drive assembly 45 drives the second sanding wheel 43 to rotate around a third direction and feeds it linearly along both the second and third directions, so that the second sanding wheel 43 grinds the outer surface of the cylindrical wood 100. In this embodiment, the sanding base 10 is a metal frame structure.

[0024] It should be noted that the sander for processing cylindrical wood 100 provided by the present invention, by setting up a clamping and rotating assembly 20, a moving assembly 30, and a grinding mechanism 40, achieves uniform grinding of the outer surface of the cylindrical wood 100, automates the wood processing, and improves the wood processing efficiency. The clamping and rotating assembly 20 can stably clamp the cylindrical wood 100 and drive it to rotate around a first direction, ensuring that the entire outer surface of the wood can be covered by the grinding mechanism 40, avoiding the uneven grinding problem caused by point contact or line contact in traditional flat sanding equipment. The first driving assembly 44 drives the first sanding wheel 42 to rotate around the first direction and feed it linearly along a second direction, which can perform the main grinding on the outer surface of the cylindrical wood 100, forming preliminary uniform contact and effectively removing material unevenness. The second sanding wheel 43 is driven by the second drive assembly 45 to rotate around a third direction and feed linearly along the second and third directions, enabling auxiliary or fine grinding of the outer surface of the cylindrical wood 100. Multi-directional feeding compensates for curvature changes, further ensuring the smoothness and consistency of the ground surface. Therefore, this invention solves the problem of uneven grinding of the outer surface of cylindrical wood 100 in existing sanders.

[0025] like Figures 2 to 4 As shown, the first drive assembly 44 includes a first drive platform 441 slidably connected to the grinding frame 41, a first abrasive wheel 42 rotatably connected to one side of the first drive platform 441, a first drive motor 442 for driving the first abrasive wheel 42 to rotate around a first direction mounted on the first drive platform 441, and a first drive cylinder 443 for driving the first drive platform 441 to move along a second direction mounted on the grinding frame 41. In this embodiment, the grinding frame 41 is a metal frame structure.

[0026] In practical implementation, the grinding frame 41, with its metal frame structure, provides a robust mounting base for the entire first drive assembly 44. This effectively withstands the vibrations and impacts generated during grinding, ensuring the stability of the first abrasive wheel 42 during high-speed rotation and feeding, thus laying the foundation for obtaining a high-quality ground surface. The first drive motor 442 is specifically responsible for driving the first abrasive wheel 42 to rotate at high speed around a first direction (i.e., the axial direction of the wood), providing the main grinding power. The first drive cylinder 443 is specifically responsible for driving the entire first drive table 441 and the first abrasive wheel 42 on it to move linearly along a second direction (i.e., the feed direction perpendicular to the axial direction of the wood), achieving radial feed of the first abrasive wheel 42 relative to the cylindrical wood 100. This design, separating the rotary drive from the linear feed drive, allows for independent control of grinding speed and feed rate, resulting in greater precision and flexibility, and facilitating parameter optimization according to processing requirements. The first sanding wheel 42, as an actively rotating grinding unit, forms a highly efficient surface contact grinding with the surface of the rotating cylindrical wood 100. Compared with traditional passive belt sanding, this active grinding has a higher material removal efficiency and can automatically compensate for the wear of the grinding wheel through continuous radial feed, ensuring the consistency of the grinding effect.

[0027] In summary, this specific structural design not only ensures the rigidity and stability of the grinding process, but also achieves efficient, uniform, and controllable grinding of the outer surface of cylindrical wood 100 through precise separation and control of the drive function, effectively solving the problems of uneven grinding and easy generation of polygonal defects mentioned in the background technology.

[0028] like Figures 2 to 4 As shown, two spaced sliding sleeves 411 are fixedly connected to the grinding machine frame 41. The first drive table 441 includes a first sliding rod 4411 and a mounting rod 4412. The first sliding rod 4411 slides through the sliding sleeve 411. The ends of the first sliding rod 4411 and the ends of the mounting rod 4412 are alternately welded and fixed to form a quadrilateral structure. The sliding sleeve 411 is located between the two mounting rods 4412. One of the mounting rods 4412 is equipped with a mounting base 4413, which is rotatably connected to a rotating shaft 4414 arranged along a first direction. A first sanding wheel 42 is fixedly mounted on one end of the rotating shaft 4414. A first drive motor 442 is mounted on the other mounting rod 4412 and is used to drive the rotating shaft 4414 to rotate. The telescopic rod of the first drive cylinder 443 is fixedly connected to the mounting rod 4412. In this embodiment, the sliding stroke of the first sliding rod 4411 can be limited by the mounting rod 4412. The first drive motor 442 provides driving power, and through the transmission of the belt and pulley, the rotating shaft 4414 drives the first sanding wheel 42 to rotate.

[0029] In specific implementation, the first drive table 441 adopts a quadrilateral frame structure formed by alternating welding of the first slide rod 4411 and the mounting rod 4412. This design constitutes a stable rigid body, which can effectively resist the radial and tangential forces generated by the first sanding wheel 42 when grinding the cylindrical wood 100, minimizing vibration and structural deformation, thereby ensuring the smoothness of the grinding process. Since the first slide rod 4411 slides through the sliding sleeve 411, it forms a classic sliding guide pair. The two spaced sliding sleeves 411 provide dual support points for the linear movement of the first drive table 441, ensuring the straightness and smoothness of its movement along the second direction, effectively preventing possible jamming or swaying during the feed process, thereby ensuring the stability of grinding accuracy. Since the mounting base 4413 and the first drive motor 442 are relatively distributed, the weight distribution of the first drive table 441 can be balanced, making the overall center of gravity more stable. Since the mounting rod 4412 can limit the sliding stroke of the first slide rod 4411, it prevents the first slide rod 4411 from sliding out of the sliding sleeve 411, thereby protecting the equipment from damage and enhancing the safety of operation.

[0030] like Figures 1 to 4 As shown, the second drive assembly 45 includes a second drive stage 4501, a third drive stage 4502, a second drive motor 4503 and a third drive motor 4504. The second drive stage 4501 is slidably connected to the third drive stage 4502, and the third drive stage 4502 is slidably connected to the grinding frame 41. The second sanding wheel 43 is rotatably connected to the second drive table 4501, and the second drive motor 4503 is mounted on the second drive table 4501 and is used to drive the second sanding wheel 43 to rotate around a third direction; the third drive table 4502 is equipped with a second drive cylinder 4505 for driving the second drive table 4501 to move linearly in a second direction, and the third drive motor 4504 is mounted on the grinding frame 41 and is used to drive the third drive table 4502 to move linearly in a third direction.

[0031] In practical implementation, the nested sliding design of the second drive stage 4501 and the third drive stage 4502 enables the complex and precise multi-degree-of-freedom movement of the second sanding wheel 43. This gives the second sanding wheel 43 two linear degrees of freedom (along the second and third directions) and one rotational degree of freedom (around the third direction), allowing it to dynamically adapt to the curvature of the cylindrical wood 100 and any minor shape deviations, ensuring an optimized contact area between the surface of the second sanding wheel 43 and the outer surface of the wood. The third drive motor 4504 drives the entire third drive stage 4502 (carrying the second drive stage 4501) to move along the third direction, achieving positioning of the second sanding wheel 43 within a large working area. The second drive cylinder 4505 drives the second drive stage 4501 to move along the second direction on the third drive stage 4502, achieving radial feed of the second sanding wheel 43 relative to the wood.

[0032] A modular design, with the second sliding table nested within the third sliding table, integrates the second drive motor 4503 and the second drive cylinder 4505 into the motion unit, resulting in a very compact structure that saves space while ensuring a direct and efficient power transmission path. The third drive motor 4504 is fixed to the stationary grinding frame 41, driving the third drive table 4502 to move, forming a stable and reliable transmission foundation. The second drive motor 4503 drives the second sanding wheel 43 to rotate at high speed, making it an active grinding head. Combined with its multi-degree-of-freedom movement capability, this unit can serve as the main grinding unit working in conjunction with the first sanding wheel 42, or it can be specifically responsible for fine grinding and polishing of complex areas. Through flexible path planning, higher quality treatment of the wood surface is achieved. The multi-degree-of-freedom movement capability of the second sanding wheel 43 enables adaptive envelope grinding of the cylindrical wood 100, greatly improving grinding uniformity and surface quality, and solving the inherent defects of traditional flat sanding equipment when processing curved workpieces.

[0033] like Figures 1 to 4 As shown, the third drive table 4502 is provided with a drive screw 4506 that is rotatably connected to the grinding machine frame 41. The drive screw 4506 is arranged along the third direction. A first driven sprocket 4507 is fixedly installed at the end of each drive screw 4506 away from the sanding base frame 10. A drive sprocket 4508 and a second driven sprocket 4509 are rotatably connected to the grinding machine frame 41. The drive sprocket 4508, the two first driven sprockets 4507 and the second driven sprocket 4509 are distributed at four corners and are meshed with a transmission chain 4512. A third drive motor 4504 is used to drive the drive sprocket 4508 to rotate around a third direction, so that the two drive screws 4506 drive the third drive table 4502 to move synchronously in a third direction.

[0034] In practical implementation, when the third drive motor 4504 drives the active sprocket 4508 to rotate, the transmission chain 4512 drives the two first driven sprockets 4507 to rotate at the same angular velocity, thereby driving the two drive screws 4506 to rotate synchronously. This ensures that the second drive table 4501 can move along a third direction, avoiding problems such as jamming, skewness, or uneven grinding pressure caused by the two drive points being asynchronous. This provides a core guarantee for the uniform grinding of the second sanding wheel 43. Distributing the four sprockets at the four corners and using the transmission chain 4512 for circumferential transmission is a very compact and efficient layout. Replacing two motors with a single third drive motor 4504 simplifies the structure, reduces cost and control complexity, and achieves synchronous drive at two points, demonstrating excellent mechanical design integration.

[0035] like Figure 2 As shown, there are two third drive stages 4502. A second slide rod 4510 passing through the second drive stage 4501 is fixedly connected between the two third drive stages 4502. Both second slide rods 4510 are arranged along the second direction. Two third slide rods 4511 corresponding to the two third drive stages 4502 are fixedly connected on the grinding frame 41. The third slide rods 4511 are arranged along the third direction and correspond one-to-one with the drive screw 4506.

[0036] In practical implementation, the third slide rod 4511 provides precise guidance for the movement of the third drive stage 4502 along the third direction, and complements the drive screw 4506 to bear the main lateral force, ensuring the stability of the long-stroke movement of the third drive stage 4502. The second slide rod 4510 provides precise guidance for the movement of the second drive stage 4501 along the second direction. This composite guiding system composed of the third slide rod 4511 and the second slide rod 4510 clearly separates and specializes the guiding functions of the two linear motion directions, making the movement of the entire grinding mechanism 40 in three-dimensional space more precise and reliable. After the two third drive platforms 4502 are connected by the second slide bar 4510, they share the load generated by the second drive assembly 45 (including the second drive platform 4501, the second drive motor 4503, the second sanding wheel 43, etc.) and evenly transmit the force to the two drive screws 4506 and the third slide bar 4511. This symmetrical and balanced force design greatly reduces vibration and wear, and ensures the stability and durability of the equipment under long-term high-speed operation.

[0037] like Figures 2 to 4 As shown, four rollers 412 distributed at the four corners are installed at the bottom of the grinding frame 41, and the rollers 412 are in rolling connection with the sanding base frame 10. The moving component 30 includes a moving motor 31 and a rack 32. The moving motor 31 is mounted on the grinding machine frame 41. The output shaft of the moving motor 31 is equipped with a moving gear 33 that meshes with the rack 32. The rack 32 is arranged along a first direction and fixedly connected to the sanding base 10. The moving motor 31 drives the moving gear 33 to rotate around a third direction. In this embodiment, there are two moving motors 31, two racks 32, and two moving gears 33. The two moving motors 31 are distributed on opposite sides of the grinding machine frame 41 along a second direction.

[0038] In specific implementation, four rollers 412 are arranged at the four corners of the bottom of the grinding frame 41. The rollers 412 form a rolling connection with the sanding base 10, providing a stable and low-friction support foundation for the entire grinding mechanism 40. This layout ensures that the grinding frame 41 is subjected to uniform force during movement, effectively preventing jamming and shaking, and allowing the grinding mechanism 40 to move smoothly and over long distances (in the first direction) along the entire length of the cylindrical wood 100. By using a transmission method in which the moving motor 31 drives the moving gear 33 to mesh with the rack 32, the rotational motion of the motor can be accurately converted into the linear motion of the grinding frame 41, ensuring the positioning accuracy of the grinding mechanism 40 at any position. This achieves continuous and uniform grinding of the entire length of the cylindrical wood 100, avoiding the problem of excessive or insufficient grinding in some areas due to inaccurate movement. The moving component 30 works in conjunction with the clamping and rotating component 20, so that while the cylindrical wood 100 rotates, the grinding mechanism 40 can automatically feed along its axial direction; thus realizing continuous helical grinding path or longitudinal feed grinding, integrating the processing process that may have previously required segmentation and manual completion into a fully automatic and efficient continuous process, significantly improving processing efficiency and consistency.

[0039] like Figure 1 and Figure 5 As shown, the clamping rotation assembly 20 includes a clamping rotation base plate 21 fixedly installed on the sanding base 10 and arranged along the first direction. The clamping rotation base plate 21 is provided with a first clamping rotation table 22, a second clamping rotation table 23 and a rotation motor 24. The first clamping rotation table 22 is fixedly connected to one end of the clamping rotation base plate 21, and the second clamping rotation table 23 is spaced apart from the first clamping rotation table 22 and detachably connected to the clamping rotation base plate 21. A first clamping rotating claw 25 is rotatably connected to a first clamping rotating table 22, and a second clamping rotating claw 26 is rotatably connected to a second clamping rotating table 23. The first clamping rotating claw 25 and the second clamping rotating claw 26 respectively insert into both ends of the cylindrical wood 100. A rotary motor 24 drives the first clamping rotating claw 25 to rotate around a first direction. In this embodiment, the second clamping rotating table 23 can be installed at a corresponding position on the clamping rotating base plate 21 according to the length of the wood to be processed, so as to realize the grinding operation of wood of different lengths. In addition, the second clamping rotating table 23 is fixedly connected to the clamping rotating base plate 21 by bolts and nuts. The rotary motor 24 provides driving power, and through the transmission of belts and pulleys, the first clamping rotating claw 25 drives the cylindrical wood 100 and the second clamping rotating claw 26 to rotate around the first direction.

[0040] In practical implementation, since the second clamping rotary table 23 and the clamping rotary base plate 21 are detachably connected (e.g., by bolts or nuts), the user can flexibly adjust the distance between the two clamping tables according to the actual length of the cylindrical wood 100 to be processed, and fasten them to the corresponding positions on the base plate. This allows for the adaptation to workpieces of various specifications, greatly improving the versatility and processing range of the equipment, and solving the bottleneck problem of traditional fixed clamping mechanisms that can only handle workpieces of a single length. By using the first clamping rotary claw 25 and the second clamping rotary claw 26 to insert into both ends of the cylindrical wood 100 respectively, this insertion clamping provides a very strong driving torque, which can effectively prevent the wood from slipping or loosening between the clamping claws during high-speed rotating grinding, ensuring the stability and reliability of the grinding process.

[0041] In an optional embodiment, the sander grinds the cylindrical wood 100 using the following method: Step S1: The cylindrical wood 100 is clamped at both ends by the clamping and rotating assembly 20 and driven to rotate around the first direction; Step S2: Drive the grinding mechanism 40 to move along the first direction by the moving component 30, so that the grinding mechanism 40 moves from one end of the cylindrical wood 100 to the other end. In step S3, during the movement of the grinding mechanism 40, the first sanding wheel 42 is driven by the first driving component 44 to rotate around the first direction and feed linearly along the second direction, so that the first sanding wheel 42 rough grinds the outer surface of the cylindrical wood 100. In step S4, during the movement of the grinding mechanism 40, the second sanding wheel 43 is driven by the second drive assembly 45 to rotate around the third direction and feed in a straight line along the second direction and the third direction, so that the second sanding wheel 43 performs fine grinding on the outer surface of the cylindrical wood 100. In this embodiment, the rough grinding in step S3 and the fine grinding in step S4 are performed at least partially simultaneously. The fine grinding in step S4 focuses on compensating for areas of the cylindrical wood 100 that have been ground by the first abrasive wheel 42, or on specifically grinding areas with local depressions. In this embodiment, compensating grinding can actively correct minor unevenness or shape errors that may be left by rough grinding. Targeted grinding utilizes its multi-degree-of-freedom motion capability to further grind natural local depressions or soft areas of the wood, achieving the effect of smoothing peaks and filling valleys.

[0042] It should be noted that by combining the clamping rotation in step S1 with the axial movement in step S2, the grinding mechanism 40 and the rotating wood surface form a continuous relative motion covering the entire length of the workpiece (such as a helical grinding path). This ensures that the grinding action is evenly distributed across the entire outer surface of the wood, avoiding local overheating or insufficient grinding, thus achieving a uniform grinding effect. By integrating the rough grinding and fine grinding processes into a single continuous automated stroke and endowing the fine grinding unit with adaptive compensation capabilities, high-efficiency and high-quality one-time processing of the outer surface of cylindrical wood 100 is achieved. By performing at least partially simultaneous rough grinding in step S3 and fine grinding in step S4, the roughing and finishing processes, which traditionally require two steps and two stations, are combined into a single continuous automated process, greatly shortening the total processing time, reducing the number of workpiece clamping operations and machine tool occupancy time, thereby significantly improving production efficiency, especially suitable for mass production. This grinding method not only ensures the quality of the material produced in a single process, but also optimizes the overall production process, achieving high quality, high efficiency and automation in the grinding of cylindrical wood.

[0043] Specifically, step S4 includes: Step S41: Based on the preset standard model of cylindrical wood 100, plan a continuous spiral feed fine grinding path for the second sanding wheel 43 that covers the entire outer surface of the cylindrical wood 100. Step S42: During the movement along the fine grinding path, the contact pressure between the second sanding wheel 43 and the outer surface of the cylindrical wood 100 is monitored in real time by a pressure sensor set on the second drive table 4501. Step S43: The real-time monitored contact pressure is compared with the preset optimal pressure value, and the second sanding wheel 43 is dynamically adjusted in the third-party upward position by the second drive component 45 so that the contact pressure is stabilized within the optimal pressure value range. Step S44: When the pressure sensor detects that the contact pressure is continuously lower than the optimal pressure value range and exceeds a preset time threshold, the area is determined to be a local depression area. The second sanding wheel 43 is controlled to pause its movement along the first direction in the area and increase the number of reciprocating sanding in the second direction and the third direction until the contact pressure in the area rises back to the optimal pressure value range.

[0044] In specific implementation, step S41 plans a continuous spiral feed fine grinding path for the second sanding wheel 43 based on a preset standard model, ensuring that the fine grinding process can systematically cover the entire outer surface of the cylindrical wood 100, without any untreated dead corners, laying a solid foundation for obtaining a globally consistent high surface finish. Step S42 directly obtains the contact pressure of the grinding process through a pressure sensor, pushing the grinding state from open-loop to closed-loop. Step S43 compares the real-time pressure with the optimal pressure value and dynamically adjusts the position of the second sanding wheel 43 in the third direction, which can automatically compensate for pressure changes caused by the inherent diameter fluctuations of the wood, uneven material hardness, or geometric errors left by coarse grinding, ensuring that the second sanding wheel 43 always contacts the cylindrical wood 100 with the optimal pressure, thereby greatly improving the uniformity of grinding and avoiding over-grinding (excessive pressure) or under-grinding (insufficient pressure). In step S44, when the system detects that the contact pressure is continuously lower than the threshold, it can actively determine that the area is a local depression and increase the number of reciprocating grinding cycles of the second abrasive wheel 43 in the second and third directions, so that the second abrasive wheel 43 performs fixed-point grinding on the depression area. Through concentrated and repeated grinding, the material around the depression area is gradually removed until the area is consistent with the overall curvature and the contact pressure returns to normal.

[0045] The above-described embodiments are only used to illustrate the technical solutions of the present invention, and are not intended to limit it. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A sander for processing cylindrical wood, characterized in that, The device includes a sanding base (10), a clamping and rotating assembly (20), a moving assembly (30), and a grinding mechanism (40). The clamping and rotating assembly (20) is used to clamp a cylindrical piece of wood (100) arranged in a first direction and drive it to rotate around the first direction. The moving assembly (30) is used to drive the grinding mechanism (40) to move along the first direction on the sanding base (10). The grinding mechanism (40) includes a grinding frame (41), a first sanding wheel (42), and a second sanding wheel (43). The grinding frame (41) is provided with a first drive assembly (44) and a second drive assembly (45). The first drive assembly (44) is used to drive the first sanding wheel (42) to rotate around a first direction and drive it to feed linearly along a second direction, so that the first sanding wheel (42) grinds the outer surface of the cylindrical wood (100). The second drive assembly (45) is used to drive the second sanding wheel (43) to rotate around a third direction and drive it to feed linearly along the second direction and the third direction, so that the second sanding wheel (43) grinds the outer surface of the cylindrical wood (100).

2. The sander for processing cylindrical wood according to claim 1, characterized in that, The first drive assembly (44) includes a first drive stage (441) slidably connected to the grinding frame (41), the first sanding wheel (42) being rotatably connected to one side of the first drive stage (441), a first drive motor (442) for driving the first sanding wheel (42) to rotate around a first direction is mounted on the first drive stage (441), and a first drive cylinder (443) for driving the first drive stage (441) to move along a second direction is mounted on the grinding frame (41).

3. The sander for processing cylindrical wood according to claim 2, characterized in that, Two spaced sliding sleeves (411) are fixedly connected to the grinding machine frame (41). The first drive table (441) includes a first sliding rod (4411) and a mounting rod (4412). The first sliding rod (4411) slides through the sliding sleeve (411). The ends of the first sliding rod (4411) and the ends of the mounting rod (4412) are alternately welded and fixed to form a quadrilateral structure. The sliding sleeve (411) is located between the two mounting rods (4412). One of the mounting rods (4412) is equipped with a mounting base (4413), which is rotatably connected to a rotating shaft (4414) arranged in a first direction. The first sanding wheel (42) is fixedly installed at one end of the rotating shaft (4414). The first drive motor (442) is installed on the other mounting rod (4412) and is used to drive the rotating shaft (4414) to rotate. The telescopic rod of the first drive cylinder (443) is fixedly connected to the mounting rod (4412).

4. The sander for processing cylindrical wood according to any one of claims 1 to 3, characterized in that, The second drive assembly (45) includes a second drive stage (4501), a third drive stage (4502), a second drive motor (4503), and a third drive motor (4504). The second drive stage (4501) is slidably connected to the third drive stage (4502), and the third drive stage (4502) is slidably connected to the grinding frame (41). The second sanding wheel (43) is rotatably connected to the second drive table (4501), and the second drive motor (4503) is mounted on the second drive table (4501) and is used to drive the second sanding wheel (43) to rotate around a third direction; a second drive cylinder (4505) is mounted on the third drive table (4502) for driving the second drive table (4501) to move linearly in a second direction, and the third drive motor (4504) is mounted on the grinding frame (41) and is used to drive the third drive table (4502) to move linearly in a third direction.

5. The sander for processing cylindrical wood according to claim 4, characterized in that, The third drive table (4502) is provided with a drive screw (4506) that is rotatably connected to the grinding machine frame (41). The drive screw (4506) is arranged along the third direction, and a first driven sprocket (4507) is fixedly installed at the end of each drive screw (4506) away from the sanding base frame (10). The grinding frame (41) is rotatably connected to a drive sprocket (4508) and a second driven sprocket (4509). The drive sprocket (4508), the two first driven sprockets (4507), and the second driven sprocket (4509) are distributed at four corners and are meshed with a transmission chain (4512). The third drive motor (4504) is used to drive the drive sprocket (4508) to rotate around a third direction, so that the two drive screws (4506) drive the third drive table (4502) to move synchronously in a straight line along a third direction.

6. The sander for processing cylindrical wood according to claim 5, characterized in that, The number of the third drive stage (4502) is set to two, and a second slide rod (4510) passing through the second drive stage (4501) is fixedly connected between the two third drive stages (4502). The two second slide rods (4510) are arranged along the second direction. Two third slide rods (4511) corresponding to passing through the two third drive stages (4502) are fixedly connected on the grinding frame (41). The third slide rods (4511) are arranged along the third direction and correspond one-to-one with the drive screw (4506).

7. The sander for processing cylindrical wood according to claim 1, characterized in that, The bottom of the grinding frame (41) is equipped with four rollers (412) distributed at the four corners, and the rollers (412) are in rolling connection with the sanding base (10). The moving component (30) includes a moving motor (31) and a rack (32). The moving motor (31) is mounted on the grinding frame (41). The output shaft of the moving motor (31) is equipped with a moving gear (33) that meshes with the rack (32). The rack (32) is arranged along a first direction and fixedly connected to the sanding base (10). The moving motor (31) is used to drive the moving gear (33) to rotate around a third direction.

8. The sander for processing cylindrical wood according to any one of claims 1 to 3 or 7, characterized in that, The clamping rotation assembly (20) includes a clamping rotation base plate (21) fixedly installed on the sanding base frame (10) and arranged along a first direction. The clamping rotation base plate (21) is provided with a first clamping rotation table (22), a second clamping rotation table (23) and a rotary motor (24). The first clamping rotation table (22) is fixedly connected to one end of the clamping rotation base plate (21). The second clamping rotation table (23) is spaced apart from the first clamping rotation table (22) and is detachably connected to the clamping rotation base plate (21). A first clamping rotating claw (25) is rotatably connected to the first clamping rotating platform (22), and a second clamping rotating claw (26) is rotatably connected to the second clamping rotating platform (23). The first clamping rotating claw (25) and the second clamping rotating claw (26) are respectively inserted into the two ends of the cylindrical wood (100). The rotary motor (24) is used to drive the first clamping rotating claw (25) to rotate around a first direction.

9. The sander for processing cylindrical wood according to claim 1, characterized in that, The sander grinds cylindrical wood (100) using the following method: Step S1: Clamp both ends of the cylindrical wood (100) by the clamping rotating assembly (20) and drive it to rotate around the first direction; Step S2, the grinding mechanism (40) is driven to move along the first direction by the moving component (30), so that the grinding mechanism (40) moves from one end of the cylindrical wood (100) to the other end; In step S3, during the movement of the grinding mechanism (40), the first sanding wheel (42) is driven by the first driving component (44) to rotate around the first direction and feed in a straight line along the second direction, so that the first sanding wheel (42) rough grinds the outer surface of the cylindrical wood (100). In step S4, during the movement of the grinding mechanism (40), the second sanding wheel (43) is driven by the second drive assembly (45) to rotate around the third direction and feed in a straight line along the second direction and the third direction, so that the second sanding wheel (43) performs fine grinding on the outer surface of the cylindrical wood (100); In this process, the rough grinding in step S3 and the fine grinding in step S4 are performed at least partially simultaneously, and the fine grinding in step S4 focuses on compensating for the area of ​​the cylindrical wood (100) after it has been ground by the first sanding wheel (42) or on the targeted grinding of its local concave areas.

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