Large size rotary cemented carbide tool brush assisted force rheo-polishing method

Abstract

The application discloses a large-size rotary hard alloy cutter brush-assisted force rheological polishing method, and a polishing device for realizing the method, which comprises a rack, a polishing liquid tank, a workpiece clamping and driving assembly and a brush; the brush is arranged above the polishing liquid tank; during polishing, the workpiece is clamped by the workpiece clamping and driving assembly and is driven to rotate by the workpiece clamping and driving assembly; relative movement between the workpiece and the force rheological polishing liquid causes the force rheological polishing liquid to have a shear thickening effect, a flexible fixed abrasive tool is formed on the surface of the workpiece, the workpiece is passivated and polished, meanwhile, the force rheological polishing liquid adhered to the surface of the workpiece is continuously pushed into the cutting tooth gap by the brush, brush-assisted force rheological polishing is carried out, and the tooth root cutting edge is passivated and polished. The large-size rotary hard alloy cutter brush-assisted force rheological polishing method can realize efficient, high-quality and high-consistency polishing of the large-size rotary hard alloy cutter.

Description

Technical Field

[0001] This invention relates to the field of tool polishing technology, specifically to a brush-assisted force rheological polishing method for large-size rotary cemented carbide tools. Background Technology

[0002] Carbide, with its excellent impact toughness, fracture toughness, fatigue strength, bending strength, and wear resistance, is widely used as a cutting tool material. Therefore, the development of cutting tool manufacturing technology is crucial. Cutting tools ground with diamond wheels often exhibit micro-chipping and serrations of varying sizes on their cutting edges. These defects tend to expand over time, accelerating tool wear. These geometric defects reduce the adhesion between the substrate and coating during coating treatment, decrease the cutting performance and service life of the tool, and can even lead to chipping or tool breakage. Therefore, a passivation and polishing process is necessary to smooth and even the cutting edge, effectively improving coating adhesion, strengthening the cutting edge, enhancing cutting performance, reducing wear, and extending tool life.

[0003] Mechanodynamic polishing (MRP) is suitable for machining parts with complex surface structures. However, existing MRP methods struggle to polish the root of the cutting edge of large rotary cutting tools, and there is a lack of practical machining platforms for large rotary tools. These limitations hinder the application of MRP in the passivation of large rotary carbide cutting tools. Existing polishing equipment and processes are primarily designed for small-sized tools. For large rotary carbide cutting tools, manual polishing is generally required, which poses certain risks, results in low polishing efficiency, and leads to poor tooth surface consistency at different locations after polishing. Summary of the Invention

[0004] To address the shortcomings of existing technologies, this application provides a brush-assisted force-rheological polishing method for large-size rotary carbide cutting tools. This method employs a specially designed polishing device, which, under specific process conditions, enables efficient, high-quality, and highly consistent polishing of large-size rotary carbide cutting tools.

[0005] The technical solution of this application is as follows:

[0006] A brush-assisted force-rheology polishing method for large-size rotary carbide cutting tools is disclosed. The device for implementing this method includes a frame, a polishing fluid tank, a workpiece clamping and driving assembly, and brushes mounted on the frame. The polishing fluid tank is open at the top to hold the force-rheology polishing fluid. The workpiece clamping and driving assembly clamps and drives the workpiece to rotate, causing the workpiece to apply shear force to the force-rheology polishing fluid in the polishing fluid tank. The brushes are positioned above the polishing fluid tank to push the force-rheology polishing fluid adhering to the workpiece surface into the gap between the cutting teeth. During polishing, the polishing slurry tank contains a force-rheological polishing slurry. The workpiece is clamped by a workpiece clamping drive assembly and driven to rotate. The relative motion between the workpiece and the force-rheological polishing slurry causes a shear thickening effect (i.e., force-rheology) in the slurry, forming a flexible, fixed abrasive that adheres to the workpiece surface. This process performs passivation polishing on the workpiece. Simultaneously, a brush continuously pushes the force-rheological polishing slurry adhering to the workpiece surface into the gap between the cutting teeth. The force-rheological polishing slurry carried by the brush undergoes a shear thickening effect, resulting in brush-assisted force-rheological polishing, which passivates and polishes the cutting edge at the tooth root.

[0007] Compared with existing technologies, the brush-assisted force rheological polishing method for large-size rotary carbide tools of this application uses a specific polishing device for polishing. During polishing, the workpiece undergoing rotary motion has relative motion with the force rheological polishing liquid in the polishing liquid tank, forming a shearing effect. This causes the force rheological polishing liquid in the contact area with the workpiece to undergo shear thickening, achieving force rheological polishing of the workpiece surface. The polishing device is equipped with a specific brush. During workpiece polishing, the brush bristles act on the workpiece surface, using the elasticity of the bristles to push the force rheological polishing liquid adhering to the workpiece surface into the tooth gaps. The force rheological polishing liquid carried by the brush undergoes a shear thickening effect, which allows the tooth root cutting edge to be effectively blunted and polished. This achieves efficient and high-quality polishing of large-size rotary carbide tools, resulting in good tooth surface consistency at different locations after polishing.

[0008] As an optimization, in the aforementioned brush-assisted force-rheological polishing method for large-size rotary carbide tools, the polishing slurry tank is contoured to the workpiece. The polishing slurry tank is designed to conform to the shape of the workpiece, ensuring that different areas of the workpiece experience the same shear force from the polishing slurry during polishing, thus guaranteeing a consistent polishing effect on the workpiece surface.

[0009] As an optimization, in the aforementioned brush-assisted force rheological polishing method for large-size rotary carbide cutting tools, the bristles of the brush are pig bristles, and the bristle density is 200-500 bristles / cm². 2 This structure results in high polishing efficiency for the tooth root cutting edge. Furthermore, during machining, the brush bristles apply uniform force to the workpiece, further ensuring the uniformity of the machining process.

[0010] As an optimization, in the aforementioned large-size rotary carbide tool brush-assisted force rheological polishing method, the workpiece clamping drive assembly includes a drive motor, a transmission shaft, and a workpiece holder, with the two ends of the transmission shaft connected to the drive motor and the workpiece holder respectively; the workpiece is mounted on the workpiece holder.

[0011] Furthermore, the workpiece has a shaft hole with a keyway, and the workpiece holder has a keyed shaft structure; the workpiece clamping drive assembly also includes a correspondingly arranged rotary center. During machining, the workpiece and the workpiece holder form a transmission engagement and are clamped by the rotary center. Using a rotary center to clamp the workpiece can improve the stability during machining and ensure machining quality. In implementing this invention, the rotary center can be a manual center driven by a handwheel. With this structure, the manual center is more economical, and the handwheel-driven center movement is convenient to operate.

[0012] On the one hand, research shows that setting the brush to reciprocating motion can improve polishing efficiency. As a specific example: the large-size rotary carbide tool brush-assisted force rheological polishing device further includes a reciprocating device, which includes a drive gear on a drive shaft, a support frame on a machine frame, a transmission component on the support frame, and a worm gear connected to the transmission component. The transmission component includes a transmission gear and a worm wheel, and a cam is connected to the worm gear. The brush bristles are fixed to a base plate, and a detachably connected movable rod is provided on the base plate. A limiting member and a B limiting member are provided on both sides of the brush. One end of the A limiting member is fixed to the machine frame, and the other end is located inside the polishing liquid tank and connected to the end of the movable rod via a spline to form a sliding pair structure. A spring is sleeved on the portion of the movable rod between the A limiting member and the base plate. One end of the B limiting member is fixed to the machine frame, and the other end is located inside the polishing liquid tank and forms a sliding pair structure with the movable rod. One end of the movable rod abuts against the cam via the B limiting member. This structure incorporates a drive gear, transmission gear, worm gear, worm, and cam, allowing the cam to rotate with the drive shaft. Limiting components A and B limit components limit the moving rod and provide axial positioning. A spring is fitted onto the portion of the moving rod located between the A limiting component and the base plate, ensuring one end of the moving rod always abuts against the cam. The moving rod is detachably connected to the base plate, allowing the brush to move with it. Under the action of the spring and cam, the brush reciprocates. This allows the brush to better remove thickened polishing fluid agglomerates formed in the gaps between the workpiece cutting teeth and pushes the rheological polishing fluid into the tooth gaps, ensuring the tooth root cutting edge is blunted and polished.

[0013] On the other hand, from the perspective of equipment versatility, the brush can be designed to be adjustable to accommodate workpieces of different sizes. As a specific example: the frame is equipped with a moving device for adjusting the distance between the brush and the workpiece; the moving device includes an A slide and a B slide located on either side of the polishing liquid tank, with an A slide platform on the A slide and a B slide platform on the B slide; one end of the brush is connected to one end of the A slide platform and the other end is connected to one end of the B slide platform. With this structure and the moving device, the distance between the brush and the workpiece can be adjusted, allowing the brush angle to be adjusted to match the slope of the workpiece surface, and enabling the polishing device to polish workpieces of different sizes.

[0014] Furthermore, after the A slide is adjusted to its proper position, it is fixedly connected to the A slide block by bolts, and after the B slide is adjusted to its proper position, it is fixedly connected to the B slide block by bolts. This structure, where the slides and slide blocks are connected by bolts, is simple, low-cost, and easy to operate.

[0015] Furthermore, slide A is fixedly connected to the frame by bolts; the frame is provided with an arc-shaped sliding groove, one end of slide B is fixedly connected to the frame, and the other end forms a sliding pair structure with the arc-shaped sliding groove; after slide B rotates to its position, it is fixedly connected to the frame by bolts; one end of the brush forms a revolute pair structure with one end of slide A, and the other end forms a revolute pair structure with one end of slide B. This structure allows for adjustment of the brush angle, enabling the polishing device to polish workpieces at different angles. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall structure during processing in Embodiment 1. Figure 1 ;

[0017] Figure 2 This is a schematic diagram of the overall structure during processing in Embodiment 1. Figure 2 ;

[0018] Figure 3 yes Figure 1 A schematic diagram of the middle section structure;

[0019] Figure 4 yes Figure 3 Cross-sectional view of the middle section of the structure;

[0020] Figure 5 This is a schematic diagram of the overall structure during processing in Embodiment 2;

[0021] Figure 6 yes Figure 5 Top view;

[0022] Figure 7 yes Figure 5 Cross-sectional view.

[0023] The labels in the attached diagram are as follows: 1-frame, 11-arc-shaped slide; 2-polishing fluid tank; 3-workpiece clamping drive assembly, 31-drive motor, 32-drive shaft, 33-workpiece clamp, 34-rotary center; 4-brush, 41-brush bristles, 42-substrate; 5-mechanical rheological polishing fluid; 6-workpiece; 7-reciprocating device, 71-drive gear, 72-support frame, 73-transmission component, 731-transmission gear, 732-worm gear, 74-worm, 75-cam, 76-moving rod, 77-A limiting component, 78-B limiting component, 79-spring; 8-moving device, 81-A slide, 82-B slide, 83-A slide table, 84-B slide table; 9-handwheel. Detailed Implementation

[0024] The present application will be further described below with reference to the accompanying drawings and embodiments, but this should not be construed as limiting the present application. In the following embodiments, content not described in detail or shown in detail in the accompanying drawings is common knowledge in the art.

[0025] In the following embodiments, the workpiece 6 being processed is a disc milling cutter with a certain inclination angle (the cutting edge is not shown in the accompanying drawings for ease of drawing).

[0026] Example 1 (see Figures 1-4 ):

[0027] A brush-assisted force-rheology polishing method for large-size rotary carbide cutting tools is disclosed. The device for implementing this method includes a frame 1, a polishing fluid tank 2, a workpiece clamping and driving assembly 3, and a brush 4 mounted on the frame 1. The polishing fluid tank 2 is open at the top and is used to hold the force-rheology polishing fluid 5. The workpiece clamping and driving assembly 3 clamps and drives the workpiece 6 to rotate, causing the workpiece 6 to exert a shearing effect on the force-rheology polishing fluid 5 in the polishing fluid tank 2. The brush 4 is positioned above the polishing fluid tank 2 and can push the force-rheology polishing fluid 5 adhering to the surface of the workpiece 6 into the cutting surface. During polishing, the polishing fluid tank 2 contains a force-rheological polishing fluid. The workpiece 6 is clamped by the workpiece clamping drive assembly 3 and driven to rotate. The relative motion between the workpiece 6 and the force-rheological polishing fluid 5 causes the force-rheological polishing fluid 5 to undergo a shear thickening effect, forming a flexible fixed abrasive that adheres to the surface of the workpiece 6, thus passivating and polishing the workpiece 6. At the same time, the brush 4 continuously pushes the force-rheological polishing fluid 5 adhering to the surface of the workpiece 6 into the gap between the cutting teeth. The force-rheological polishing fluid 5 wrapped by the brush 4 undergoes a shear thickening effect, performing brush-assisted force-rheological polishing, which passesivates and polishes the cutting edge of the tooth root.

[0028] In this embodiment, the workpiece clamping drive assembly 3 includes a drive motor 31, a transmission shaft 32, and a workpiece clamp 33. The two ends of the transmission shaft 32 are respectively connected to the drive motor 31 and the workpiece clamp 33; the workpiece 6 is mounted on the workpiece clamp 33.

[0029] In this embodiment, the brush 4 is capable of reciprocating motion; the large-size rotary carbide tool brush-assisted force rheological polishing device further includes a reciprocating device 7, which includes a drive gear 71 mounted on the drive shaft 32, a support frame 72 mounted on the frame 1, a transmission component 73 mounted on the support frame 72, and a worm gear 74 connected to the transmission component 73. The transmission component 73 includes a transmission gear 731 and a worm wheel 732, and a cam 75 is connected to the worm gear 74; the bristles 41 of the brush 4 are fixed on the base plate 42, and the base plate 42 is provided with a detachably connected movable rod 76; the movable rod 76 is provided with The brush 4 has a threaded hole and is fixed to the base plate 42 by screws. A limiting member 77 and a limiting member 78 are provided on both sides of the brush 4. One end of the limiting member 77 is fixed to the frame 1, and the other end is located inside the polishing liquid tank 2 and is connected to the end of the moving rod 76 via a spline to form a sliding pair structure. A spring 79 is sleeved on the portion of the moving rod 76 located between the limiting member 77 and the base plate 42. One end of the limiting member 78 is fixed to the frame 1, and the other end is located inside the polishing liquid tank 2 and forms a sliding pair structure with the moving rod 76. One end of the moving rod 76 abuts against the cam 75 via the limiting member 78. The drive gear 71, transmission gear 731, worm gear 732, worm 74, and cam 75 are configured so that cam 75 can rotate with the rotation of transmission shaft 32. Limiting member A 77 and limiting member B 78 are configured to limit the moving rod 76 and provide axial positioning. A spring 79 is sleeved on the part of the moving rod 76 located between limiting member A 77 and base plate 42 so that one end of the moving rod 76 always abuts against cam 75. The moving rod 76 is detachably connected to base plate 42 so that brush 4 can move with moving rod 76, thereby realizing the reciprocating motion of brush 4 under the action of spring 79 and cam 75. This allows brush 4 to better remove the thickened agglomerates of polishing liquid formed in the gap between the cutting teeth of workpiece 6 and push the rheological polishing liquid 5 into the gap, ensuring that the cutting edge of the tooth root is blunted and polished.

[0030] In this embodiment, the polishing fluid tank 2 is contoured to the workpiece 6. The polishing fluid tank 2 is designed to conform to the shape of the workpiece 6, ensuring that different areas of the workpiece experience the same shear force from the polishing fluid during polishing, thus guaranteeing a consistent polishing effect on the surface of the workpiece 6.

[0031] In this embodiment, the bristles 41 of the brush 4 are made of pig bristles, and the density of the bristles 41 is 300 bristles / cm. 2This structure results in high polishing efficiency for the tooth root cutting edge. Furthermore, during processing, the bristles 41 of the brush 4 apply uniform force to the workpiece 6, thereby further ensuring the uniformity of processing.

[0032] In this embodiment, the workpiece 6 has a shaft hole with a keyway, and the workpiece holder 33 has a keyed shaft structure. The workpiece clamping drive assembly 3 also includes a correspondingly provided rotary center 34. During machining, the workpiece 6 and the workpiece holder 33 form a transmission engagement, and the workpiece 6 is clamped by the rotary center 34. Using the rotary center 34 to clamp the workpiece 6 can improve the stability during machining and ensure machining quality.

[0033] In this embodiment, the rotary center 34 is a manual center, driven by a handwheel 9. This structure makes the manual center more economical, and the handwheel 9 facilitates operation.

[0034] In this embodiment, the polishing process is performed using the following steps:

[0035] ①: Install workpiece 6 onto workpiece holder 33;

[0036] ②: Turn the handwheel 9 to make the rotating center 34 press against the workpiece 6;

[0037] ③: Pour the rheological polishing slurry 5 into the polishing slurry tank 2;

[0038] ④: Start the workpiece clamping drive assembly 3 to drive the workpiece 3 to rotate, while the brush 4 performs reciprocating motion.

[0039] Set the polishing process parameters, including an ambient temperature of 22℃-23℃, an ambient humidity of less than 50%, a drive motor speed of 31 at 80 rpm, and a polishing time of 15 minutes. After polishing, use a ZOLLER 3D morphology measuring instrument to measure the change in the radius of the cutting edge after polishing. Take three cutting edges on the workpiece, and take three measurement points on the cutting edge, one near the small end face, one near the large end face, and one in the middle of the small end face and the large end face. The measurement location is at the root of the tooth.

[0040] The measurement results are as follows:

[0041] Blade sampling point The radius of the cutting edge before polishing, r (μm). The radius of the cutting edge after polishing, r (μm). 1.1 11 20 1.2 10 19 1.3 11 21 2.1 15 23 2.2 15 24 2.3 17 26 3.1 13 23 3.2 14 23 3.3 14 24

[0042] Experimental results show that after polishing, the cutting edge radius increases significantly, resulting in a remarkable polishing effect. The degree of radius increase is relatively consistent across different positions on the same end face, ensuring the consistency of the polished end face. Furthermore, on the same cutting edge, the degree of radius increase is relatively consistent across different positions on the tooth surface, ensuring the consistency of the polished tooth surface direction.

[0043] Example 2 (see Figures 5-7 ):

[0044] Unlike the brush 4 in Embodiment 1, which is capable of reciprocating motion, in this embodiment, the brush 4 is fixedly positioned.

[0045] In this embodiment, the brush 4 can be adjusted to accommodate workpieces of different sizes. A moving device 8 is provided on the frame 1 to adjust the distance between the brush 4 and the workpiece 6. The moving device 8 includes an A slide 81 and a B slide 82 located on both sides of the polishing liquid tank 2. An A slide table 83 is mounted on the A slide 81, and a B slide table 84 is mounted on the B slide 82. One end of the brush 4 is connected to one end of the A slide table 83, and the other end is connected to one end of the B slide table 84. By providing the moving device 8, the distance between the brush 4 and the workpiece 6 can be adjusted, ensuring that the angle of the brush 4 is the same as the slope of the workpiece 6 surface, and enabling the polishing device to polish workpieces 6 of different sizes.

[0046] In this embodiment, after the A slide 83 is adjusted to its position, it is fixedly connected to the A slide block 81 by bolts. After the B slide 84 is adjusted to its position, it is fixedly connected to the B slide block 82 by bolts. The method of connecting the slides and slide blocks with bolts is simple in structure, low in cost, and easy to operate.

[0047] In this embodiment, slide A 81 is fixedly connected to the frame 1 by bolts; the frame 1 is provided with an arc-shaped sliding groove 11; one end of slide B 82 is fixedly connected to the frame 1, and the other end forms a sliding pair structure with the arc-shaped sliding groove 11; after slide B 82 rotates to its position, it is fixedly connected to the frame 1 by bolts; one end of brush 4 forms a rotating pair structure with one end of slide A 83, and the other end forms a rotating pair structure with one end of slide B 84. Using this structure, the angle of brush 4 can be adjusted, enabling the polishing device to polish workpieces 6 at different angles.

[0048] In this embodiment, the polishing process is performed using the following steps:

[0049] ①: Install workpiece 6 onto workpiece holder 33;

[0050] ②: Turn the handwheel 9 to make the rotating center 34 press against the workpiece 6;

[0051] ③: Adjust the positions of slide A 83, slide B 84 and slide B 82 so that the brush 4 acts on the surface of the workpiece 6 and the angle of the brush 4 is the same as the slope of the surface of the workpiece 6.

[0052] ④: Pour the rheological polishing slurry 5 into the polishing slurry tank 2;

[0053] ⑤: Start the workpiece clamping drive assembly 3 to drive the workpiece 3 to rotate.

[0054] Set the polishing process parameters, including an ambient temperature of 22℃-23℃, an ambient humidity of less than 50%, a drive motor speed of 31 at 80 rpm, and a polishing time of 15 minutes. After polishing, use a ZOLLER 3D morphology measuring instrument to measure the change in the radius of the cutting edge after polishing. Take three measurement points on the cutting edge, one near the small end face, one near the large end face, and one in the middle of the small end face and the large end face. The measurement location is the tooth root.

[0055] The measurement results are as follows:

[0056] Blade sampling point The radius of the cutting edge before polishing, r (μm). The radius of the cutting edge after polishing, r (μm). 4.1 14 18 4.2 16 21 4.3 15 19 5.1 15 20 5.2 15 21 5.3 17 21 6.1 12 17 6.2 11 17 6.3 13 18

[0057] Experimental results show that the cutting edge radius is significantly increased. The degree of increase in the cutting edge radius is relatively consistent at different positions on the same end face. Furthermore, the degree of increase in the cutting edge radius is also relatively consistent at different positions on the same cutting edge, ensuring the consistency of the tooth surface direction in the polishing effect.

[0058] The foregoing general description of the invention and its specific embodiments should not be construed as a limitation on the technical solution of the invention. Those skilled in the art, based on the disclosure of this application, can add, reduce, or combine the disclosed technical features in the foregoing general description and / or specific embodiments (including examples) without departing from the constituent elements of the invention, to form other technical solutions within the scope of protection of this application.

Claims

1. A brush-assisted force rheological polishing method for large-size rotary cemented carbide cutting tools, characterized in that: The large-size rotary carbide cutting tool brush-assisted force rheological polishing device for implementing this method includes a frame (1), a polishing liquid tank (2), a workpiece clamping drive assembly (3), and a brush (4) disposed on the frame (1); the polishing liquid tank (2) is open at the top and is used to hold the force rheological polishing liquid (5); the workpiece clamping drive assembly (3) is used to clamp and drive the workpiece (6) to rotate, so that the workpiece (6) applies shear force to the force rheological polishing liquid (5) in the polishing liquid tank (2); the brush (4) is disposed above the polishing liquid tank (2) and can push the force rheological polishing liquid (5) adhering to the surface of the workpiece (6) into the gap between the cutting teeth; The workpiece (6) is a disc milling cutter with a certain tilt angle; The polishing liquid tank (2) is contoured to the workpiece (6); The large-size rotary carbide tool brush-assisted force rheological polishing device for implementing this method also includes a reciprocating device (7). The reciprocating device (7) includes a drive gear (71) on the drive shaft (32), a support frame (72) on the frame (1), a transmission component (73) on the support frame (72), and a worm gear (74) connected to the transmission component (73). The transmission component (73) includes a transmission gear (731) and a worm wheel (732). A cam (75) is connected to the worm gear (74). The bristles (41) of the brush (4) are fixed on the base plate (42), and the base plate (42) is provided with a detachably connected movable rod (76). The brush (4) is provided with an A limiting member (77) and a B limiting member (78) on both sides; one end of the A limiting member (77) is fixed on the frame (1), and the other end is located inside the polishing liquid tank (2) and is connected to the end of the moving rod (76) by a spline to form a sliding pair structure. A spring (79) is sleeved on the part of the moving rod (76) between the A limiting member (77) and the base plate (42); one end of the B limiting member (78) is fixed on the frame (1), and the other end is located inside the polishing liquid tank (2) and is connected to the moving rod (76) to form a sliding pair structure. One end of the moving rod (76) abuts against the cam (75) through the B limiting member (78); During polishing, the polishing liquid tank (2) contains a force rheological polishing liquid. The workpiece (6) is clamped by the workpiece clamping drive assembly (3) and driven to rotate by the workpiece clamping drive assembly (3). The relative motion between the workpiece (6) and the force rheological polishing liquid (5) causes the force rheological polishing liquid (5) to undergo a shear thickening effect, forming a flexible fixed abrasive that adheres to the surface of the workpiece (6) and performs passivation polishing on the workpiece (6). At the same time, the brush (4) continuously pushes the force rheological polishing liquid (5) adhering to the surface of the workpiece (6) into the gap between the cutting teeth. The force rheological polishing liquid (5) wrapped by the brush (4) undergoes a shear thickening effect, performing brush-assisted force rheological polishing, so that the tooth root cutting edge is passivated and polished.

2. The brush-assisted force rheological polishing method for large-size rotary cemented carbide cutting tools according to claim 1, characterized in that: The bristles (41) of the brush (4) are pig bristles, and the density of the bristles (41) is 200 to 500 bristles / cm².

3. The brush-assisted force rheological polishing method for large-size rotary cemented carbide cutting tools according to claim 2, characterized in that: The workpiece clamping drive assembly (3) includes a drive motor (31), a transmission shaft (32) and a workpiece clamp (33). The two ends of the transmission shaft (32) are respectively connected to the drive motor (31) and the workpiece clamp (33); the workpiece (6) is mounted on the workpiece clamp (33).

4. The brush-assisted force rheological polishing method for large-size rotary cemented carbide cutting tools according to claim 3, characterized in that: The workpiece (6) has a shaft hole with a keyway, and the workpiece holder (33) has a keyed shaft structure; the workpiece clamping drive assembly (3) also includes a corresponding rotary center (34). During processing, the workpiece (6) and the workpiece holder (33) form a transmission fit and are clamped by the rotary center (34).

5. The brush-assisted force rheological polishing method for large-size rotary cemented carbide cutting tools according to claim 4, characterized in that: The rotary center (34) is a manual center, driven by a handwheel (9).

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