A device for milling the bevel of the inner circle of a wooden board for a wooden floor

Abstract

This invention discloses a milling device for the inner bevel edge of a wooden board in a steel-wood disc. It includes a set of symmetrically arranged crossbeam module frames, with a uniformly rotating positioning worktable positioned between the two crossbeam module frames. A transversely moving crossbeam module is positioned above the two crossbeam module frames. Guide rails for sliding the moving crossbeam module are laid along the length of the top surface of the crossbeam module frames. A milling cutter power module and a flexible holding module are mounted on the moving crossbeam module, both of which can move back and forth along the length of the moving crossbeam module. This invention uses the uniformly rotating positioning worktable to drive the disc ring with the fan-shaped wooden board to rotate at a uniform speed. Combined with the milling cutter power module and the flexible holding module, it achieves automatic contour milling of the 45° bevel edge of the inner circle of the fan-shaped wooden board, offering advantages such as high automation, stable processing quality, and high production efficiency.

Description

Technical Field

[0001] This invention relates to the field of ironwood disc processing equipment, specifically to a device for milling the inner bevel of wooden boards for ironwood discs. Background Technology

[0002] Currently, the production of wooden reels for cable installation in China primarily employs traditional processing methods. This involves sawing off the ends of the original wooden boards at a 45° bevel according to the reel's design requirements, then laying out fan-shaped wooden boards along the inner arc of the reel's outer ring to form a complete circle, and finally manually hammering each board into place. This traditional method suffers from the following drawbacks: high labor intensity and harsh working conditions for employees; poor product quality stability and low pass rate; high workforce and labor costs; and low overall production efficiency. With the cable industry's increasing demands for reel quality and production capacity, traditional manual processing methods are no longer sufficient to meet the needs of modern production. Therefore, there is an urgent need to develop specialized equipment capable of automatically milling the beveled edges of the fan-shaped wooden boards for cable reels.

[0003] Therefore, it is necessary to provide a device for milling the inner bevel of wooden boards for ironwood discs to solve the above-mentioned technical problems. Summary of the Invention

[0004] The purpose of this invention is to address the shortcomings of existing technologies by providing a milling device for the inner bevel edge of a wooden board used in ironwood discs, so as to realize automated contour milling of the 45° bevel edge of the inner circle of the fan-shaped wooden board, reduce labor intensity, and improve production efficiency and processing quality.

[0005] To achieve the above objectives, the technical solution adopted by the present invention is as follows:

[0006] A milling device for the inner bevel edge of a wooden board for ironwood discs includes a set of symmetrically arranged crossbeam module frames. A uniformly rotating positioning worktable is arranged between the two crossbeam module frames. A transverse movable crossbeam module is provided above the two crossbeam module frames. A crossbeam slide rail for displacement of the movable crossbeam module is laid on the top surface of the crossbeam module frame along its length direction. The movable crossbeam module is provided with a milling cutter power module and a flexible holding module that can move back and forth along its length direction.

[0007] Preferably, the uniform speed rotating positioning worktable includes a rotating platform disposed on the top surface of the base and rotatably connected to the base. The top surface of the base is also provided with a rotating component for driving the rotating platform to rotate. A positioning platform is installed on the top surface of the rotating platform, and the outer diameter of the positioning platform is smaller than the outer diameter of the rotating platform. A lifting device for supporting the fan-shaped wooden board is arranged on the annular area on the top surface of the rotating platform located around the positioning platform. Multiple lifting devices are arranged radially at equal angular intervals with the center of the positioning platform as the center.

[0008] Preferably, the top surface of the base is provided with a mounting bracket for mounting the rotating component. A first slide rail arranged radially along the rotary table is mounted on the top surface of the mounting bracket. A fine-tuning slide seat is slidably mounted on the first slide rail. The mounting bracket is also provided with a first cylinder for driving the fine-tuning slide seat to move along the first slide rail. The rotating component is mounted on the fine-tuning slide seat. The rotating component includes a rotary motor and an active friction wheel. The rotary motor is fixed to the bottom surface of the fine-tuning slide seat. Its output shaft passes through the fine-tuning slide seat and is connected to the active friction wheel above the fine-tuning slide seat. The active friction wheel and the side wall of the rotary table are driven by friction.

[0009] Preferably, the positioning platform has a positioning core post at its center and a positioning groove at its edge for engaging the spokes of the disc.

[0010] Preferably, the lifting device includes a base plate installed on the top surface of the rotary table. The base plate is arranged radially along the rotary table, and a second slide rail is arranged along the length of the top surface of the base plate. A lifting sliding seat is slidably installed on the second slide rail. An arc-shaped plate is fixedly connected to the top surface of the lifting sliding seat. The arc of the arc-shaped plate is consistent with the arc of the positioning table and the outer edge of the rotary table. Adjacent arc-shaped plates are equidistant from each other. A second cylinder is fixedly connected to the outer side of the arc-shaped plate. The piston rod end of the second cylinder is fixedly connected to a support plate that fits against the outer surface of the arc-shaped plate. A guide hole is opened in the middle of the support plate, and a guide bolt fixed to the outer side of the arc-shaped plate passes through the guide hole.

[0011] Preferably, the milling cutter power module includes a milling cutter slide seat, a backing plate is provided on one side of the milling cutter slide seat in the vertical direction, a third slide rail is provided on the side of the backing plate away from the milling cutter slide seat, a lifting slide seat is slidably mounted on the third slide rail, a third cylinder is also installed on the top of the backing plate to drive the lifting slide seat to move along the third slide rail, the lifting slide seat is fixedly connected to the milling cutter seat, a milling cutter motor is installed at one end of the milling cutter seat, a milling cutter cutter is installed at the other end of the milling cutter seat, and the tail end of the milling cutter shaft is connected to the output end of the milling cutter motor through a belt pulley mechanism.

[0012] Preferably, the flexible holding module includes a front flexible holding module and a rear flexible holding module arranged at intervals along the length direction of the moving crossbeam module. The front flexible holding module has the same structure as the rear flexible holding module. The flexible holding module includes a holding sliding seat, a holding cylinder seat is provided on the top surface of the holding sliding seat, a holding cylinder is fixedly connected to the side of the holding cylinder seat, a holding top plate is fixedly connected to the piston rod end of the holding cylinder, and a plurality of holding components are arranged side by side along the length direction below the holding top plate. The holding components include a holding seat with a T-shaped structure, a holding slider that can be displaced in the vertical direction is provided on the side of the vertical section of the holding seat, a holding rod is fixedly connected to the holding slider, a nylon pressure wheel is rotatably connected to the bottom of the holding rod, and a compression spring is provided between the top surface of the holding rod and the bottom surface of the horizontal section of the holding seat.

[0013] Preferably, a tension spring connects the front flexible holding module and the milling cutter power module.

[0014] Compared with the prior art, the present invention has the following advantages:

[0015] 1. This invention uses a uniformly rotating positioning worktable to support the rotating disc, which, in conjunction with the milling cutter power module on the moving crossbeam module, enables automated contour milling of the 45° inclined edge of the inner circle of a fan-shaped wooden board. This replaces the traditional manual sawing method, significantly reducing labor intensity and improving production efficiency.

[0016] 2. The present invention provides flexible holding modules on the front and rear sides of the milling cutter power module. The nylon pressure roller driven by the compression spring applies flexible pressure to the fan-shaped wooden board, which can overcome the influence of unevenness on the surface of the wooden board and ensure that the fan-shaped wooden board always maintains close contact with the die ring during the milling process, thus ensuring the stability and consistency of the milling quality.

[0017] 3. This invention connects the front flexible holding module and the milling cutter power module with a tension spring, so that the milling cutter cutting edge always keeps in contact with the end of the fan-shaped wooden board. Combined with the movement mode of the disc ring and the milling cutter rotating in the same direction with a speed difference, continuous and stable contour milling is achieved, which effectively improves the machining accuracy.

[0018] 4. The uniform-speed rotating positioning worktable of the present invention has multiple lifting devices arranged radially at equal angles around the periphery of the positioning table. The arc-shaped plates of each lifting device are spaced equidistantly, with each interval corresponding to a spoke of the die ring. During hoisting, the spokes can directly pass through the intervals, allowing the die ring to land smoothly on the positioning table without additional alignment adjustments. After the die ring is in place, a second cylinder drives the support plates to extend, and each support plate, together with the arc-shaped plate, forms a complete annular support surface, providing uniform and stable lifting support for the fan-shaped wooden board. This structure cleverly resolves the contradiction between interference between the die ring spokes and the annular support of the wooden board, balancing hoisting convenience and processing support stability, and significantly improving loading and unloading efficiency. Attached Figure Description

[0019] Figure 1 This is the front view of the present invention;

[0020] Figure 2 This is a schematic diagram of the structure of the disc ring placed on a uniformly rotating positioning worktable;

[0021] Figure 3 yes Figure 1 Enlarged view of point A in the middle;

[0022] Figure 4 This is a schematic diagram of the lifting device installed on the top surface of the rotary table;

[0023] Figure 5 This is a first-person view of the structure of the milling cutter power module and the flexible holding module mounted on the moving crossbeam module.

[0024] Figure 6 This is a schematic diagram of the structure of the milling cutter power module and the flexible holding module mounted on the moving crossbeam module from a second-person perspective.

[0025] Figure 7 yes Figure 6 Enlarged view of point B in the middle;

[0026] Figure 8 yes Figure 1 A three-dimensional schematic diagram;

[0027] Figure 9 This is a schematic diagram of a fan-shaped wooden board being milled on a milling machine.

[0028] Among them, 1-crossbeam module frame, 2-uniform speed rotating positioning worktable, 201-base, 202-rotating table, 203-positioning table, 204-mounting bracket, 205-fine-tuning sliding seat, 206-first cylinder, 207-rotary motor, 208-active friction wheel, 209-base plate, 210-lifting sliding seat, 211-arc plate, 212-second cylinder, 213-support plate, 3-disc ring, 4- - Moving crossbeam module, 5- Milling cutter power module, 501- Milling cutter sliding seat, 502- Backing plate, 503- Lifting sliding seat, 504- Third cylinder, 505- Milling cutter motor, 506- Milling cutter, 6- Flexible holding module, 601- Holding sliding seat, 602- Holding cylinder, 603- Holding top plate, 604- Holding seat, 605- Holding rod, 606- Nylon pressure roller, 607- Compression spring, 7- Tension spring Detailed Implementation

[0029] The present invention will be further illustrated below with reference to the accompanying drawings and specific embodiments. It should be understood that these embodiments are for illustrative purposes only and not for limiting the scope of the invention. After reading this invention, any modifications of the invention in various equivalent forms by those skilled in the art will fall within the scope defined by the appended claims.

[0030] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "setting," "connection," "fixed connection," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Unless otherwise explicitly limited, those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0031] In this invention, terms such as "upper," "lower," "bottom," and "top" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are merely relational terms determined for the convenience of describing the structural relationship of the various components or elements of this invention, and do not specifically refer to any component or element in this invention, and should not be construed as limiting this invention.

[0032] like Figure 1 As shown, the present invention provides a milling device for the inner bevel edge of a wooden disc, comprising a set of symmetrically arranged crossbeam module frames 1, with two crossbeam module frames fixedly installed on both sides of the working surface. A uniformly rotating positioning worktable 2 is provided between the two crossbeam module frames, which is used to support and drive the disc ring 3, on which the fan-shaped wooden board is laid, to rotate at a uniform speed. A movable crossbeam module 4 is arranged across the top of the two crossbeam module frames, and a crossbeam slide rail is laid on the top surface of the crossbeam module frame along its length. The two ends of the movable crossbeam module are respectively slidably engaged with the crossbeam slide rails on both sides, and can move back and forth along the length of the crossbeam module frame. A milling cutter power module 5 and a flexible holding module 6 are provided on the movable crossbeam module, both of which can move back and forth along the length of the movable crossbeam module to adjust the processing position according to the disc ring of different specifications.

[0033] like Figure 2 As shown, the uniform-speed rotating positioning worktable includes a rotary table 202 disposed on the top surface of a base 201 and rotatably connected to the base, which is fixedly installed on the working surface. A rotating assembly for driving the rotary table is also disposed on the top surface of the base. Concentrically arranged positioning platforms 203 are mounted on the top surface of the rotary table, with the outer diameter of the positioning platform 203 being smaller than the outer diameter of the rotary table, forming an annular area on the top surface of the rotary table surrounding the positioning platforms. Lifting devices for supporting the fan-shaped wooden boards are arranged on this annular area, with multiple lifting devices radially spaced at equal angles around the center of the positioning platform. A positioning core is provided at the center of the positioning platform for centering and positioning by engaging with the center hole of the tool ring. Positioning grooves are provided on the edge of the positioning platform for engaging the spokes of the tool ring, preventing circumferential movement of the tool ring during rotation.

[0034] like Figure 3As shown, the top surface of the base is provided with a mounting bracket 204 for mounting the rotating assembly. A first slide rail arranged radially along the rotary table is mounted on the top surface of the mounting bracket. A fine-tuning slide seat 205 is slidably mounted on the first slide rail. The mounting bracket also has a first cylinder 206 for driving the fine-tuning slide seat to move along the first slide rail. The distance between the fine-tuning slide seat and the rotary table can be adjusted by pushing and pulling the first cylinder. The rotating assembly is mounted on the fine-tuning slide seat. The rotating assembly includes a rotary motor 207 and an active friction wheel 208. The rotary motor is fixed to the bottom surface of the fine-tuning slide seat, and its output shaft passes through the fine-tuning slide seat and is connected to the active friction wheel located above the fine-tuning slide seat. The active friction wheel and the side wall of the rotary table achieve transmission through friction. When the rotary motor starts, the active friction wheel rotates, driving the rotary table to rotate at a constant speed by friction. By adjusting the extension of the first cylinder, the clamping force between the active friction wheel and the side wall of the rotary table can be changed, thereby adjusting the reliability of the friction transmission.

[0035] like Figure 4 As shown, the lifting device includes a base plate 209 mounted on the top surface of the rotary table, arranged radially along the rotary table. A second slide rail is laid on the top surface of the base plate radially along the rotary table, and a lifting sliding seat 210 is slidably mounted on the second slide rail. The lifting sliding seat can slide back and forth along the second slide rail to adjust its radial position, thereby adapting to the needs of different specifications of disc rings. An arc-shaped plate 211 is fixed to the top surface of the lifting sliding seat. The curvature of the arc-shaped plate is consistent with the curvature of the positioning table and the outer edge of the rotary table. Adjacent arc-shaped plates maintain an equal interval, and the width of this interval is set to be greater than the width of the disc ring spokes, so that when the disc ring is hoisted and positioned, each spoke can pass through the corresponding interval. A second cylinder 212 is fixed to the outer side of the arc-shaped plate, and a support plate 213 that fits against the outer surface of the arc-shaped plate is fixed to the end of the piston rod of the second cylinder. The support plate is used to lift the fan-shaped wooden boards at the intervals between the arc-shaped plates. A guide hole is provided in the middle of the pallet, and a guide bolt fixed to the outside of the arc plate is inserted in the guide hole. The guide bolt cooperates with the guide hole to provide guidance for the extension and retraction of the pallet and ensure that the pallet moves smoothly.

[0036] It should be noted that the disc ring includes an inner and outer ring arranged coaxially, and multiple spokes connecting the inner and outer rings. When the disc ring is placed on the positioning platform, the inner ring and the portion of the spokes near the inner ring rest on the upper surface of the positioning platform, while the outer ring and the portion of the spokes near the outer ring are suspended in the air. Each lifting device is precisely located within the fan-shaped area enclosed by the inner ring, outer ring, and adjacent spokes. After the disc ring is positioned, the second cylinder drives the support plates to extend, and each support plate abuts against the outer surface of the curved plate. Multiple support plates are spliced ​​circumferentially, working together with the curved plates to form a complete annular support surface for supporting the subsequently laid fan-shaped wooden planks. This design ensures that the hoisting and positioning of the disc ring and the annular support of the fan-shaped wooden planks do not interfere with each other, guaranteeing both quick and convenient positioning of the disc ring and providing stable and uniform support for the fan-shaped wooden planks.

[0037] like Figure 5-7 As shown, the milling cutter power module 5 includes a milling cutter sliding seat 501, which is slidably mounted on the moving crossbeam module and can reciprocate along the length of the moving crossbeam module. A vertical support plate 502 is provided on one side of the milling cutter sliding seat, and a third slide rail is provided on the side of the support plate opposite to the milling cutter sliding seat. A lifting sliding seat 503 is slidably mounted on the third slide rail, and the lifting sliding seat can reciprocate along the third slide rail in the vertical direction. A third cylinder 504 is also installed on the top of the support plate to drive the lifting sliding seat to move along the third slide rail. A milling cutter holder is fixedly connected to the lifting sliding seat. A milling cutter motor 505 is mounted on one end of the milling cutter holder, and a milling cutter 506 is mounted on the other end of the milling cutter holder. The milling cutter shaft and the output end of the milling cutter motor are connected by a belt pulley mechanism to achieve power transmission. During operation, the third cylinder drives the lifting sliding seat to descend, causing the milling cutter to descend to the processing position corresponding to the end of the fan-shaped wooden board. The milling cutter motor drives the milling cutter to rotate at high speed through a belt drive mechanism to complete the milling process.

[0038] The flexible holding module 6 includes a front flexible holding module and a rear flexible holding module arranged at intervals along the length of the moving crossbeam module. The front and rear flexible holding modules have the same structure. Taking one of the flexible holding modules as an example, it includes a holding sliding seat 601, which is slidably mounted on the moving crossbeam module and can move back and forth along the length of the moving crossbeam module. A holding cylinder seat is provided on the top surface of the holding sliding seat, and a holding cylinder 602 is fixedly connected to the side of the holding cylinder seat. A holding top plate 603 is fixedly connected to the end of the piston rod of the holding cylinder, and the holding top plate can extend and retract in the vertical direction under the drive of the holding cylinder. Multiple holding components are arranged side by side along the length of the holding top plate. Each holding assembly includes a T-shaped holding seat 604. The vertical section of the holding seat has a holding slider that can slide back and forth vertically. The holding slider is fixedly connected to a holding rod 605. A nylon pressure roller 606 is rotatably connected to the bottom of the holding rod. A compression spring 607 abuts against the top surface of the holding rod and the bottom surface of the horizontal section of the holding seat. Under the elastic force of the spring, the nylon pressure roller is biased downwards, overcoming the unevenness of the fan-shaped wooden board surface, maintaining flexible contact with the fan-shaped wooden board and applying appropriate clamping force to ensure that the board does not shift during milling. A set of symmetrically arranged tension springs 7 connects the holding sliding seat of the front flexible holding module and the milling cutter sliding seat of the milling cutter power module. The tension springs ensure that the milling cutter power module is always subjected to a tensile force in the direction of the front flexible holding module, ensuring that the milling cutter cutting edge always maintains contact with the end of the fan-shaped wooden board, ensuring continuous and stable milling.

[0039] The principle and usage of this invention:

[0040] First, based on the specifications and dimensions of the disc ring to be processed, the position of the moving crossbeam module on the crossbeam module frame is adjusted, and the positions of the milling cutter power module and the flexible holding module on the moving crossbeam module are also adjusted, so that each module is aligned with the processing station. The flexible holding module is locked in position on the moving crossbeam module by a locking structure. At the same time, the fine-tuning sliding seat is driven by the first cylinder to move along the first slide rail, adjusting the clamping force between the active friction wheel and the side wall of the rotary table.

[0041] The disc ring, either already laid with fan-shaped wooden planks or to be laid with them, is hoisted onto a uniformly rotating positioning workbench. The circumferential angle of the disc ring is adjusted so that each spoke of the disc ring aligns with the gap between adjacent curved plates. The disc ring is then slowly lowered. During hoisting, each spoke passes through the corresponding gap in the curved plate, and the inner ring and the inner part of the spokes of the disc ring land smoothly on the positioning platform. The positioning core at the center of the positioning platform is inserted into the center hole of the disc ring, and simultaneously, one spoke of the disc ring is engaged in the positioning groove of the positioning platform, achieving rapid centering and circumferential positioning of the disc ring. At this point, the outer ring and the outer part of the spokes of the disc ring are suspended in the air, and each lifting device is located within the fan-shaped area enclosed by the inner ring, the outer ring, and the adjacent spokes.

[0042] After the disc ring is positioned, the second cylinder is activated. The piston rod of the second cylinder drives the support plates to extend, and each support plate fits against the outer surface of the arc-shaped plate. Multiple support plates are spliced ​​together circumferentially, forming a complete annular support surface together with the arc-shaped plates. Fan-shaped wooden boards are laid on this annular support surface, and uniform and stable support is provided by the arc-shaped plates and support plates.

[0043] The equipment is started, and the rotary motor drives the rotary table to rotate at a constant speed via the active friction wheel, causing the die ring to rotate at a constant speed as well. The moving beam module moves to the set position along the guide rail of the beam module frame. The third cylinder drives the lifting sliding seat to descend, causing the milling cutter to move down to the machining position; the pressing cylinders of the front flexible pressing module and the rear flexible pressing module respectively drive their respective pressing top plates to extend, so that each nylon pressing roller, under the action of the compression spring, presses against the front and rear of the fan-shaped wooden board, ensuring that the fan-shaped wooden board remains in close contact with the die ring throughout the milling process. The tension spring ensures that the milling cutter power module is always subjected to a tensile force in the direction of the front flexible pressing module, ensuring that the milling cutter cutting edge always remains in contact with the end of the fan-shaped wooden board.

[0044] The milling cutter motor starts, driving the milling cutter to rotate at high speed via a pulley mechanism. Due to the uniform rotation of the milling disc, the milling cutter performs a circular feed motion relative to the end of the fan-shaped wooden board. Under the high-speed rotation and cutting action of the milling cutter, the inner edge of the fan-shaped wooden board is continuously milled to form a 45° bevel. One full rotation of the milling disc completes the milling of the 45° bevel at the end of all the fan-shaped wooden boards.

[0045] After processing is completed, all components are reset to make room for the hoisting and placement of the next die ring. The processed die ring is then hoisted out and enters the next process.

[0046] The foregoing description illustrates and describes preferred embodiments of the present invention. As previously stated, it should be understood that the present invention is not limited to the forms disclosed herein and should not be construed as excluding other embodiments. It can be used in various other combinations, modifications, and environments, and can be altered within the scope of the inventive concept described herein through the foregoing teachings or techniques or knowledge in related fields. Any modifications and variations made by those skilled in the art that do not depart from the spirit and scope of the present invention should be within the protection scope of the appended claims.

Claims

1. A milling device for the inner bevel edge of a wooden board used in ironwood discs, characterized in that: It includes a set of symmetrically arranged crossbeam module frames, a uniformly rotating positioning worktable arranged between the two crossbeam module frames, a transversely moving crossbeam module above the two crossbeam module frames, a crossbeam slide rail laid along the length direction on the top surface of the crossbeam module frame for the displacement of the moving crossbeam module, and a milling cutter power module and a flexible holding module that can move back and forth along the length direction on the moving crossbeam module.

2. The milling device for the inner bevel edge of a wooden board for ironwood discs according to claim 1, characterized in that: The uniform speed rotating positioning worktable includes a rotating platform disposed on the top surface of the base and rotatably connected to the base. The top surface of the base is also provided with a rotating component that drives the rotating platform to rotate. A positioning platform is installed on the top surface of the rotating platform, and the outer diameter of the positioning platform is smaller than the outer diameter of the rotating platform. A lifting device for supporting the fan-shaped wooden board is arranged on the annular area on the top surface of the rotating platform surrounding the positioning platform. Multiple lifting devices are arranged radially at equal angular intervals with the center of the positioning platform as the center.

3. The milling device for the inner bevel edge of a wooden board for ironwood discs according to claim 2, characterized in that: The top surface of the base is provided with a mounting bracket for mounting the rotating component. A first slide rail arranged radially along the rotary table is mounted on the top surface of the mounting bracket. A fine-tuning slide seat is slidably mounted on the first slide rail. The mounting bracket is also provided with a first cylinder for driving the fine-tuning slide seat to move along the first slide rail. The rotating component is mounted on the fine-tuning slide seat. The rotating component includes a rotary motor and an active friction wheel. The rotary motor is fixed to the bottom surface of the fine-tuning slide seat. Its output shaft passes through the fine-tuning slide seat and is connected to the active friction wheel above the fine-tuning slide seat. The active friction wheel and the side wall of the rotary table are driven by friction.

4. The milling device for the inner bevel edge of a wooden board for ironwood discs according to claim 2, characterized in that: The positioning platform has a positioning core column at its center and a positioning groove on its edge for engaging the spokes of the disc.

5. A milling device for the inner bevel edge of a wooden board for use in ironwood discs according to claim 2, characterized in that: The lifting device includes a base plate installed on the top surface of the rotary table. The base plate is arranged radially along the rotary table, and a second slide rail is arranged along the length of the top surface of the base plate. A lifting sliding seat is slidably installed on the second slide rail. An arc-shaped plate is fixed to the top surface of the lifting sliding seat. The arc of the arc-shaped plate is consistent with the arc of the positioning table and the outer edge of the rotary table. Adjacent arc-shaped plates are equidistant from each other. A second cylinder is fixed to the outer side of the arc-shaped plate. The piston rod end of the second cylinder is fixed to a support plate that fits against the outer surface of the arc-shaped plate. A guide hole is opened in the middle of the support plate, and a guide bolt fixed to the outer side of the arc-shaped plate passes through the guide hole.

6. The milling device for the inner bevel edge of a wooden board for ironwood discs according to claim 1, characterized in that: The milling cutter power module includes a milling cutter slide seat. A backing plate is provided on one side of the milling cutter slide seat in the vertical direction. A third slide rail is provided on the side of the backing plate opposite to the milling cutter slide seat. A lifting slide seat is slidably mounted on the third slide rail. A third cylinder is also installed on the top of the backing plate to drive the lifting slide seat to move along the third slide rail. The lifting slide seat is fixedly connected to the milling cutter seat. A milling cutter motor is installed at one end of the milling cutter seat, and a milling cutter is installed at the other end of the milling cutter seat. The tail end of the milling cutter shaft is connected to the output end of the milling cutter motor through a pulley mechanism.

7. The milling device for the inner bevel edge of a wooden board for ironwood discs according to claim 1, characterized in that: The flexible holding module includes a front flexible holding module and a rear flexible holding module arranged at intervals along the length of the moving crossbeam module. The front flexible holding module has the same structure as the rear flexible holding module. The flexible holding module includes a holding sliding seat. A holding cylinder seat is provided on the top surface of the holding sliding seat. A holding cylinder is fixedly connected to the side of the holding cylinder seat. A holding top plate is fixedly connected to the piston rod end of the holding cylinder. Multiple holding components are arranged side by side along the length of the holding top plate. The holding components include a holding seat with a T-shaped structure. A holding slider that can be displaced in the vertical direction is provided on the side of the vertical section of the holding seat. A holding rod is fixedly connected to the holding slider. A nylon pressure wheel is rotatably connected to the bottom of the holding rod. A compression spring is provided between the top surface of the holding rod and the bottom surface of the horizontal section of the holding seat.

8. The milling device for the inner bevel edge of a wooden board for ironwood discs according to claim 7, characterized in that: A tension spring connects the front flexible holding module and the milling cutter power module.

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