A clamping device for cutting circular workpieces

Abstract

This utility model discloses a clamping device for cutting circular workpieces, relating to the field of workpiece processing machinery and equipment technology. It includes a processing table with a notch groove on its front side. A drive motor is fixedly mounted on the top of the processing table, and a central positioning rod is fixedly connected to the output end of the drive motor. A gear is fixedly connected to the outside of the central positioning rod, and a spline is provided on the outside of the central positioning rod. A material support plate is sleeved on the outside of the central positioning rod, and the material support plate engages with the spline on the outside of the central positioning rod via a keyway. The material support plate is located above the gear, and the outside of the central positioning rod has external threads. This utility model eliminates the need to disassemble the workpiece or change tooling and equipment during ring cutting of circular workpieces, significantly simplifying the secondary processing steps, reducing operational complexity, improving processing efficiency and overall workpiece surface accuracy, and demonstrating high practicality.

Description

Technical Field

[0001] This utility model relates to the field of workpiece processing machinery and equipment technology, and in particular to a clamping device for cutting circular workpieces. Background Technology

[0002] Silicon carbide is an inorganic compound composed of silicon (Si) and carbon (C), belonging to typical covalently bonded ceramic materials. In nature, it exists as the extremely rare mineral "moissanite." Industrially, silicon carbide is typically smelted in a high-temperature electric resistance furnace using raw materials such as quartz sand, petroleum coke (or coal coke), and sawdust. Silicon carbide has extremely high hardness, with a Mohs hardness of 9.5 and a microhardness of 2840-3320 kg / mm², second only to diamond (Mohs 10) and cubic boron nitride (Mohs 9.8), making it one of the most commonly used superhard materials in industrial applications.

[0003] In the processing of circular silicon carbide workpieces, wire cutting machines are often used to cut the workpieces. This is because silicon carbide has extremely high hardness and brittleness, making it difficult to cut with ordinary mechanical tools, which are prone to cracking and wear. Wire cutting, on the other hand, removes material through grinding, resulting in low stress, high precision, and suitability for brittle materials. It is less likely to damage the workpiece and can cut complex structures such as internal holes, irregular shapes, and thin walls.

[0004] When traditional wire cutting machines cut the inner / outer circles of ring-shaped workpieces, uneven force can easily cause poor surface smoothness due to the workpiece being clamped and cut to the end. Therefore, it is usually necessary to remove the workpiece after cutting, change the tooling, or use other equipment to reprocess the workpiece to ensure that the smoothness of the entire workpiece is consistent. However, secondary processing undoubtedly increases the processing steps, making the processing work more cumbersome, time-consuming, labor-intensive, and inefficient. Therefore, a clamping device for cutting ring-shaped workpieces is needed to solve the above technical problems. Utility Model Content

[0005] This utility model discloses a clamping device for cutting annular workpieces. It provides installation space for a wire cutting machine through a notch in the machining table. After a central positioning bar is fitted into the inner hole of the annular workpiece, the bottom is supported by four sets of ring-shaped support plates (not in contact with the material support plate). The pressure plate, in conjunction with a limiting nut, achieves axial clamping. A through hole is pre-set at the top of the workpiece for the wire to pass through. The wire is located within the gap between the support plate and the extension plate of the material support plate to avoid motion interference. A drive motor drives the central positioning bar, material support plate, pressure plate, and workpiece to rotate synchronously. Sliding friction is formed between the workpiece and the support plate, allowing the wire cutting machine to stably remove the outer ring material of the workpiece, obtaining a smooth annular workpiece in one pass, ensuring initial cutting accuracy.

[0006] To address the issue of insufficient smoothness at the cut end due to gravity tilting when the workpiece separates from the outer ring during the initial cut, this device achieves efficient supplementary processing through a secondary clamping mechanism. After the initial cut, the workpiece falls onto the support plate, and the pressure plate is released. At this time, the slide seats on the two sets of arc-shaped slide rails drive the mounting frame into pre-positioned positions. Two telescopic cylinders extend synchronously, pushing the movable seats to move towards each other, so that the transmission teeth in the groove of the movable seat precisely mesh with the gear of the central positioning bar. Subsequently, the clamping cylinder drives the clamping plate and clamping screw to move down, cooperating with the support plate to achieve secondary axial fixation of the workpiece. When the drive motor is working, the gear drives the movable seat and mounting frame to move along the arc-shaped slide rail through the transmission teeth, and the wire cutter can perform precise secondary cutting on the cut end. The entire process does not require disassembling the workpiece, changing tooling and equipment, greatly simplifying the secondary processing steps, reducing operational complexity, and improving processing efficiency and overall workpiece surface accuracy. In summary, this solves the problems in the background technology.

[0007] To solve the above-mentioned technical problems, this utility model is achieved through the following technical solution:

[0008] This utility model discloses a clamping device for cutting circular workpieces, comprising a processing table with a notch groove on its front side, a drive motor fixedly mounted on the top of the processing table, a central positioning rod fixedly connected to the output end of the drive motor, a gear fixedly connected to the outside of the central positioning rod, a spline on the outside of the central positioning rod, a material support plate sleeved on the outside of the central positioning rod, the material support plate engaging with the spline on the outside of the central positioning rod via a keyway, the material support plate being located above the gear, an external thread on the outside of the central positioning rod, a pressure plate movably sleeved on the outside of the central positioning rod, a limiting nut screwed onto the outside of the central positioning rod, the limiting nut being screwed onto the central positioning rod, and both the material support plate and the pressure plate consisting of a central disc and external extension plates, with three extension plates arranged in a circular array on the outer circumference of the disc;

[0009] The support mechanism includes a bracket assembly, which has four sets. All four sets of bracket assemblies are fixedly installed on the top of the processing table and are arranged in a circular array around the central positioning bar. A support plate is fixedly connected to the top of the bracket assembly. There is a gap between the four support plates and the extension plate of the material support plate, and the top height of the support plate is higher than the top height of the material support plate.

[0010] The secondary clamping mechanism includes two arc-shaped slide rails, both of which are fixedly installed on the top of the processing table and symmetrically distributed on both sides of the drive motor. The center of the sector of the arc-shaped slide rail is consistent with the output shaft of the drive motor. A slide block is slidably installed on the top of the arc-shaped slide rail, and an L-shaped mounting bracket is fixedly connected to the top of the slide block. A telescopic cylinder is fixedly installed inside the mounting bracket, and a transmission plate is fixedly connected to the telescopic end of the telescopic cylinder. Two linear slide rails are fixedly installed on the top of the mounting bracket, and a movable seat is slidably installed on the top of the linear slide rails through a sliding connector. One end of the movable seat has an arc-shaped inner groove, and the inner wall of the inner groove has transmission teeth. The spacing and size of the transmission teeth match those of gears. A clamping cylinder is fixedly installed on the top of the movable seat, and a clamping plate is fixedly connected to the telescopic end of the clamping cylinder. A clamping screw is provided on the clamping plate, and two clamping screws are close to each other.

[0011] Furthermore, the material support plate does not contact the gear, and a limiting block is fixedly connected to the outside of the central positioning rod, with the top of the limiting block fitting against the bottom of the material support plate.

[0012] Furthermore, a first protective cover is fixedly installed on the top of the processing table, and the first protective cover is located outside the drive motor.

[0013] Furthermore, a second protective cover is installed on the outside of the mounting bracket. The second protective cover is a fan-shaped protective cover and is located outside the arc-shaped slide rail.

[0014] Furthermore, both the material support plate and the clamping plate are provided with anti-slip pads on opposite sides, and the anti-slip pads are made of rubber material.

[0015] Furthermore, the support assembly includes a lower support frame and an upper support frame. The lower support frame is fixedly installed on the top of the processing table. Multiple adjustment mounting holes are vertically and equally spaced on the lower support frame. The upper support frame is fixedly installed on the lower support frame by mounting bolts. The mounting bolts are locked and fixed to one of the adjustment mounting holes. The top of the upper support frame is fixedly connected to the bottom of the support plate. The top of the support plate is a smooth surface.

[0016] The present invention has the following advantages over the prior art:

[0017] (1) This technical solution provides an installation and adaptation space for the wire cutting machine through the notch groove of the processing table. After the center positioning bar is fitted into the inner hole of the annular workpiece, the bottom is supported by four sets of ring array support plates (not in contact with the material support plate). The pressure plate and the limit nut achieve axial clamping. The top of the workpiece has a pre-set through hole for the wire to pass through. The wire is located in the gap between the support plate and the extension plate of the material support plate to avoid motion interference. The drive motor drives the center positioning bar, the material support plate, the pressure plate and the workpiece to rotate synchronously. The workpiece and the support plate form sliding friction. The wire cutting machine can stably cut off the outer ring material of the workpiece and obtain a smooth outer ring workpiece in one go, ensuring the initial cutting accuracy.

[0018] (2) This technical solution addresses the problem of insufficient smoothness at the cutting end due to gravity tilting when the workpiece is separated from the outer ring during the first cut. This device achieves efficient supplementary processing through a secondary clamping mechanism. After the first cut is completed, the workpiece falls onto the support plate, and the pressure plate is released. At this time, the slide seats on the two sets of arc-shaped slide rails drive the mounting frame to be preset in place. The two telescopic cylinders extend synchronously and push the movable seat to move towards each other, so that the transmission teeth of the groove in the movable seat are precisely meshed with the gear of the center positioning bar. Subsequently, the clamping cylinder drives the clamping plate and clamping screw to move down, which, together with the support plate, achieves secondary axial fixation of the workpiece. When the drive motor is working, the gear drives the movable seat and mounting frame to move along the arc-shaped slide rail through the transmission teeth. The wire cutter can perform precise secondary cutting on the cutting end. The whole process does not require disassembling the workpiece, changing tooling and equipment, greatly simplifying the secondary processing procedure, reducing the complexity of operation, and improving processing efficiency and overall surface accuracy of the workpiece. Attached Figure Description

[0019] To more clearly illustrate the technical solutions of the embodiments of this utility model, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0020] Figure 1 This is a schematic diagram of the overall three-dimensional structure of this utility model;

[0021] Figure 2 This is a schematic diagram of the arc-shaped slide rail installation structure of this utility model;

[0022] Figure 3 This is an exploded view of the pressure plate installation structure of this utility model;

[0023] Figure 4 This is a schematic diagram of the material support plate installation structure of this utility model;

[0024] Figure 5 This is a schematic diagram showing the distribution and structure of the movable seat of this utility model;

[0025] Figure 6 This is a schematic diagram of the exploded structure of the movable seat of this utility model.

[0026] In the diagram: 1. Processing table; 2. Notch groove; 3. Drive motor; 4. Center positioning rod; 5. Gear; 6. Material support plate; 7. Pressure plate; 8. Limit nut; 9. Bracket assembly; 901. Lower support frame; 902. Upper support frame; 903. Adjustment mounting hole; 904. Mounting bolt; 10. Support plate; 11. Arc-shaped slide rail; 12. Slide seat; 13. Mounting bracket; 14. Telescopic cylinder; 15. Transmission plate; 16. Linear slide rail; 17. Movable seat; 18. Transmission gear; 19. Clamping cylinder; 20. Clamping plate; 21. Clamping screw; 22. Limit block; 23. First protective cover; 24. Second protective cover; 25. Anti-slip pad. Detailed Implementation

[0027] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of the present utility model.

[0028] In the description of this utility model, it should be understood that the terms "surface", "side", "gap", "peripheral", etc., which indicate orientation or positional relationship, are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the components or elements 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 this utility model.

[0029] Reference Figures 1-6 A clamping device for cutting circular workpieces includes a processing table 1. The front of the processing table 1 has a notch 2. A drive motor 3 is fixedly installed on the top of the processing table 1. A central positioning rod 4 is fixedly connected to the output end of the drive motor 3. A gear 5 is fixedly connected to the outside of the central positioning rod 4. A spline is provided on the outside of the central positioning rod 4. A support plate 6 is sleeved on the outside of the central positioning rod 4. The support plate 6 is matched and engaged with the spline on the outside of the central positioning rod 4 through a keyway. The support plate 6 is located above the gear 5. The outside of the central positioning rod 4 has an external thread. A pressure plate 7 is movably sleeved on the outside of the central positioning rod 4. A limiting nut 8 is screwed on the outside of the central positioning rod 4. The limiting nut 8 is screwed to the central positioning rod 4. The support plate 6 and the pressure plate 7 are both composed of a central disc and an external extension plate. There are three extension plates, which are arranged in a ring array on the outer circumference of the disc.

[0030] The support mechanism includes a bracket assembly 9, which has four sets. All four sets of bracket assemblies 9 are fixedly installed on the top of the processing table 1 and are arranged in a circular array around the central positioning rod 4. A support plate 10 is fixedly connected to the top of the bracket assembly 9. There is a gap between the four support plates 10 and the extension plate of the material support plate 6, and the top height of the support plate 10 is higher than the top height of the material support plate 6.

[0031] The secondary clamping mechanism includes two arc-shaped slide rails 11, both of which are fixedly mounted on the top of the processing table 1. The two arc-shaped slide rails 11 are symmetrically distributed on both sides of the drive motor 3. The center of the sector of each arc-shaped slide rail 11 coincides with the axis of the output end of the drive motor 3. A slide block 12 is slidably mounted on the top of each arc-shaped slide rail 11. An L-shaped mounting bracket 13 is fixedly connected to the top of the slide block 12. A telescopic cylinder 14 is fixedly mounted inside the mounting bracket 13. The telescopic end of the telescopic cylinder 14 is fixedly connected to a transmission mechanism. The top of the plate 15 and the mounting bracket 13 is fixedly mounted with two linear slide rails 16. The top of the linear slide rails 16 is slidably mounted with a movable seat 17 through a sliding connector. One end of the movable seat 17 is provided with an arc-shaped inner groove. The inner wall of the inner groove is provided with transmission teeth 18. The spacing and size of the transmission teeth 18 are matched with the gear 5. The top of the movable seat 17 is fixedly mounted with a clamping cylinder 19. The telescopic end of the clamping cylinder 19 is fixedly connected with a clamping plate 20. The clamping plate 20 is provided with clamping screws 21. The two clamping screws 21 are close to each other.

[0032] The material support plate 6 does not contact the gear 5. The center positioning rod 4 is fixedly connected to the outside of the limiting block 22, and the top of the limiting block 22 is in contact with the bottom of the material support plate 6. The top of the processing table 1 is fixedly installed with a first protective cover 23, which is located outside the drive motor 3. The outside of the mounting bracket 13 is a second protective cover 24, which is a fan-shaped protective cover and located outside the arc-shaped slide rail 11. The material support plate 6 and the pressing plate 20 are both provided with anti-slip pads 25 on opposite sides, and the anti-slip pads 25 are made of rubber material.

[0033] The support assembly 9 includes a lower support frame 901 and an upper support frame 902. The lower support frame 901 is fixedly installed on the top of the processing table 1. Multiple adjustment mounting holes 903 are vertically and equally spaced at the lower support frame 901. The upper support frame 902 is fixedly installed on the lower support frame 901 by mounting bolts 904. The mounting bolts 904 are locked and fixed with one of the adjustment mounting holes 903. The top of the upper support frame 902 is fixedly connected to the bottom of the support plate 10. The top of the support plate 10 is a smooth surface.

[0034] In the specific implementation process, when cutting and processing a ring-shaped silicon carbide workpiece, the initial debugging of the device and the initial positioning of the workpiece must be completed first. According to the thickness of the ring-shaped workpiece to be processed, the height of the support assembly 9 in the support mechanism is adjusted: loosen the mounting bolt 904 on the lower support frame 901, move the upper support frame 902 along the vertical direction of the lower support frame 901 to a suitable position, so that the support plates 10 at the top of the four sets of support assemblies 9 are at the same horizontal height, and this height can meet the requirement that the bottom of the workpiece does not contact the material support plate 6 after it is placed. Then, tighten the mounting bolt 904 in the corresponding height adjustment mounting hole 903 to complete the adaptation adjustment of the height of the support plate 10. Next, install the wire cutting machine in the notch 2 on the front of the processing table 1, so that the cutting path of the wire is aligned with the position to be cut on the workpiece, and at the same time ensure that the wire is located in the gap between the support plate 10 and the extension plate of the material support plate 6 to avoid motion interference during the subsequent cutting process.

[0035] After completing the initial debugging, the workpiece is clamped and the first cut is performed. The inner hole of the annular silicon carbide workpiece is aligned with the center positioning rod 4 and installed, ensuring the bottom of the workpiece is stably placed on top of the four sets of support plates 10 arranged in a ring array. At this point, the bottom of the workpiece remains separated from the support plate 6, with the support plates 10 providing stable support. Then, the pressure plate 7 is movably fitted onto the outside of the center positioning rod 4, ensuring the anti-slip pad 25 at the bottom of the pressure plate 7 is in contact with the top of the workpiece. The limiting nut 8 is then screwed onto the external thread of the center positioning rod 4 and rotated clockwise until the limiting nut 8 exerts stable pressure on the pressure plate 7. This pressure is achieved through the interaction between the pressure plate 7 and the support plates 10. The axial clamping and fixing of the workpiece is achieved. The drive motor 3 is started, and the output end of the drive motor 3 drives the center positioning bar 4 to rotate. Since the material support plate 6 is matched and engaged with the spline of the center positioning bar 4 through the keyway, the pressure plate 7 rotates synchronously with the center positioning bar 4 under the limiting action of the limiting nut 8, thereby driving the workpiece to rotate at a uniform speed. Sliding friction is formed between the workpiece and the support plate 10. At this time, the wire cutting machine is started, and the wire grinds and cuts the outer ring of the rotating workpiece. Since the workpiece always maintains a stable axial positioning and circumferential motion trajectory during the rotation, the excess material of the outer ring of the workpiece can be removed in one go to obtain a ring-shaped workpiece with a preliminary outer wall.

[0036] When the first cut reaches its end, the workpiece separates from the outer ring cut-off portion. At this time, the workpiece loses axial pressure and falls to the top of the support plate 6. The support plate 6 provides bottom support for the workpiece. The drive motor 3 and the wire cutting machine are turned off. Then, the secondary clamping mechanism is started to prepare for the supplementary processing: the two telescopic cylinders 14 are started. The telescopic ends of the telescopic cylinders 14 push the transmission plate 15 to move. The transmission plate 15 drives the movable seat 17 to slide towards each other along the linear slide rail 16 until the transmission teeth 18 in the inner groove of the movable seat 17 precisely mesh with the gear 5. The clamping cylinder 19 is started. The telescopic end of the clamping cylinder 19 pushes the clamping plate 20 down, so that the clamping screw 21 at the bottom of the clamping plate 20 contacts the top of the workpiece. This, together with the support plate 6, achieves secondary axial fixation of the workpiece. At this time, the anti-slip pad layer 25 further increases the friction with the surface of the workpiece to prevent the workpiece from sliding during the supplementary processing.

[0037] After the secondary clamping and fixing is completed, the drive motor 3 and the wire cutting machine are restarted. The drive motor 3 drives the center positioning bar 4 to rotate, and the gear 5 drives the movable seat 17 to rotate synchronously through the transmission gear 18. Since the center of the arc-shaped slide rail 11 is consistent with the output shaft of the drive motor 3, the movable seat 17 drives the mounting bracket 13 to follow along the arc-shaped slide rail 11, ensuring that the abrasive wire is always aligned with the area to be processed at the end of the workpiece. The wire cutting machine performs precise secondary grinding on the end of the cut to eliminate the problem of insufficient smoothness caused by the tilt of gravity at the end of the first cut. After the supplementary processing is completed, the drive motor 3 and the wire cutting machine are turned off. The clamping cylinder 19 is controlled to reset and drive the clamping plate 20 to move upward. Then the telescopic cylinder 14 is controlled to reset and separate the movable seat 17 from the gear 5. Finally, the processed ring-shaped workpiece can be removed, completing the entire cutting process.

[0038] The center positioning bar 4 is provided with a limiting block 22 on the outside and is attached to the bottom of the support plate 6. This provides precise axial positioning for the support plate 6, prevents the support plate 6 from moving axially during the rotation of the center positioning bar 4, ensures that the support plate 6 supports the workpiece in a stable position, improves the positioning accuracy during secondary clamping, and prevents the support plate 6 from contacting the gear 5 and causing wear, thus extending the service life of the device.

[0039] Among them, the top of the processing table 1 has a first protective cover 23 installed outside the drive motor 3 to form physical protection for the drive motor 3. This can effectively block silicon carbide dust and debris generated during the cutting process from entering the drive motor 3, avoiding wear or short circuit of internal motor components, and preventing operators from accidentally touching rotating parts, thus improving operational safety.

[0040] Among them, the mounting bracket 13 is equipped with a fan-shaped second protective cover 24 located outside the arc-shaped slide rail 11. It protects the core moving parts of the secondary clamping mechanism, prevents cutting dust from adhering to the sliding contact surface of the arc-shaped slide rail 11 and the slide seat 12, and prevents the increase of sliding resistance from affecting the follow-up accuracy. At the same time, the fan-shaped structure is adapted to the movement trajectory of the arc-shaped slide rail 11, avoiding interference of the protective cover with the follow-up movement of the movable seat 17.

[0041] Among them, the material support plate 6 and the clamping plate 20 are provided with rubber anti-slip pads 25 on opposite sides to increase the friction coefficient with the workpiece surface. During the axial clamping process, it can effectively prevent the workpiece from sliding relative to each other, ensuring that the workpiece maintains a stable movement trajectory during rotary cutting and reprocessing. At the same time, the rubber material has a certain elasticity, which can avoid rigid contact causing pressure damage to the workpiece surface.

[0042] Among them, the support assembly 9 adopts a structure of lower support frame 901 and upper support frame 902 with adjustment mounting hole 903 to realize the height adjustment of support plate 10, which can be adapted to ring-shaped workpieces of different thicknesses and specifications, so that support plate 10 can always provide stable support for workpieces without contacting material support plate 6. There is no need to replace support assembly 9 of different specifications, which improves the versatility and applicability of the device and reduces equipment investment costs.

[0043] The preferred embodiments of this utility model disclosed above are merely illustrative of the present utility model. These preferred embodiments do not exhaustively describe all details, nor do they limit the utility model to the specific implementations described. Clearly, many modifications and variations can be made based on the content of this specification. This specification selects and specifically describes these embodiments to better explain the principles and practical applications of this utility model, thereby enabling those skilled in the art to better understand and utilize it. This utility model is limited only by the claims and their full scope and equivalents.

Claims

1. A clamping device for cutting of toroidal workpieces, characterized in that The system includes a processing table (1), with a notch (2) on the front side. A drive motor (3) is fixedly installed on the top of the processing table (1). A center positioning rod (4) is fixedly connected to the output end of the drive motor (3). A gear (5) is fixedly connected to the outside of the center positioning rod (4). A spline is provided on the outside of the center positioning rod (4). A material support plate (6) is sleeved on the outside of the center positioning rod (4). The material support plate (6) is matched and engaged with the spline on the outside of the center positioning rod (4) through a keyway. The material support plate (6) is located above the gear (5). The outer side of the central positioning rod (4) is provided with external threads. The outer side of the central positioning rod (4) is movably fitted with a pressure plate (7). The outer side of the central positioning rod (4) is screwed with a limiting nut (8). The limiting nut (8) is screwed with the central positioning rod (4). The material support plate (6) and the pressure plate (7) are both composed of a central disc and an outer extension plate. There are three extension plates. The three extension plates are arranged in a ring array on the outer circumference of the disc. The support mechanism includes a bracket assembly (9), which has four sets. The four sets of bracket assemblies (9) are fixedly installed on the top of the processing table (1), and the four sets of bracket assemblies (9) are arranged in a ring array around the central positioning rod (4). The top of the bracket assembly (9) is fixedly connected to a support plate (10). There is a gap between the four support plates (10) and the extension plate of the material support plate (6), and the top height of the support plate (10) is higher than the top height of the material support plate (6). The secondary clamping mechanism includes two arc-shaped slide rails (11), both of which are fixedly installed on the top of the processing table (1). The two arc-shaped slide rails (11) are symmetrically distributed on both sides of the drive motor (3). The center of the arc-shaped slide rail (11) is consistent with the output axis of the drive motor (3). A slide block (12) is slidably installed on the top of the arc-shaped slide rail (11). An L-shaped mounting bracket (13) is fixedly connected to the top of the slide block (12). A telescopic cylinder (14) is fixedly installed inside the mounting bracket (13). A transmission plate (1) is fixedly connected to the telescopic end of the telescopic cylinder (14). 5) Two linear slide rails (16) are fixedly installed on the top of the mounting bracket (13). A movable seat (17) is slidably installed on the top of the linear slide rails (16) through a sliding connector. One end of the movable seat (17) is provided with an arc-shaped inner groove. A transmission tooth (18) is provided on the inner wall of the inner groove. The spacing and size of the transmission tooth (18) are matched with the gear (5). A clamping cylinder (19) is fixedly installed on the top of the movable seat (17). A clamping plate (20) is fixedly connected to the telescopic end of the clamping cylinder (19). A clamping screw (21) is provided on the clamping plate (20). The two clamping screws (21) are close to each other.

2. A chucking device for cutting of toroidal workpieces according to claim 1, characterized in that The material support plate (6) does not contact the gear (5), and the center positioning rod (4) is fixedly connected to the outside of the limiting block (22), with the top of the limiting block (22) fitting against the bottom of the material support plate (6).

3. The clamping device for cutting circular workpieces according to claim 1, characterized in that, The top of the processing table (1) is fixedly equipped with a first protective cover (23), which is located outside the drive motor (3).

4. A clamping device for cutting circular workpieces according to claim 1, characterized in that, The mounting bracket (13) is equipped with a second protective cover (24), which is a fan-shaped protective cover and located outside the arc-shaped slide rail (11).

5. A clamping device for cutting circular workpieces according to claim 1, characterized in that, The material support plate (6) and the pressing plate (20) are provided with anti-slip pads (25) on opposite sides, and the anti-slip pads (25) are made of rubber material.

6. A clamping device for cutting circular workpieces according to claim 1, characterized in that, The bracket assembly (9) includes a lower support frame (901) and an upper support frame (902). The lower support frame (901) is fixedly installed on the top of the processing table (1). The lower support frame (901) has multiple vertically spaced adjustment mounting holes (903). The upper support frame (902) is fixedly installed on the lower support frame (901) by mounting bolts (904). The mounting bolts (904) are locked and fixed to one of the adjustment mounting holes (903). The top of the upper support frame (902) is fixedly connected to the bottom of the support plate (10). The top of the support plate (10) is a smooth surface.

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