Durable clamp for heavy-load machining of large disc workpieces

Abstract

The invention belongs to the technical field of machining fixtures, and particularly relates to a durable fixture for heavy-load machining of large disc workpieces, which comprises a circular supporting table, supporting legs are arranged at the lower end of the circular supporting table in an array manner, centering mechanisms are arranged at the upper end of the circular supporting table in an array manner, and a protective plate is arranged between the two centering mechanisms. Supporting blocks are arranged between the lower surface of the protection plate and the upper surface of the circular supporting table in an array mode, clamping mechanisms are arranged at the upper end of the circular supporting table in an array mode, a machining disc is arranged over the circle center of the circular supporting table, and a mechanical clamping jaw is clamped to the outer side face of the machining disc. And the upper end of the mechanical clamping jaw is externally connected with hoisting equipment. According to the durable clamp, the automatic process from hoisting, centering to clamping of the workpiece is achieved, manual intervention is reduced, the labor intensity is reduced, the workpiece clamping time is shortened through the linkage design of all the mechanisms, and especially the production efficiency of batch machining is greatly improved for the heavy characteristic of the large disc type workpiece.

Description

Technical Field

[0001] This invention relates to the field of machining fixture technology, and in particular to a durable fixture for heavy-duty machining of large disc-shaped workpieces. Background Technology

[0002] In high-end equipment fields such as wind power, heavy machinery, and machine tool manufacturing, large disc-shaped workpieces, such as wind turbine flanges with diameters of 1-5m and weights of several tons, large gear blanks, and machine tool worktables, are core basic components. Their machining accuracy directly determines the operational stability and service life of the entire equipment. The machining of these workpieces often involves heavy-duty processes such as milling, grinding, and drilling. During the machining process, they must withstand huge cutting forces and vibration impacts. Moreover, the workpieces themselves are heavy and bulky, which places stringent requirements on the centering accuracy, clamping stability, structural durability, and ease of operation of the clamping fixtures.

[0003] However, existing fixtures for heavy-duty machining of large disc-shaped workpieces still have many technical defects and are difficult to meet actual production needs: Traditional fixtures often use manual-assisted positioning or simple mechanical centering structures, relying on the operator's experience to adjust the workpiece position. This is not only inefficient, but also makes it difficult to achieve precise alignment between the center of large disc-shaped workpieces and the machining datum. Furthermore, some mechanical centering mechanisms use single-point positioning guidance, which is easily affected by the deformation of the workpiece's own weight, leading to centering offset. Ultimately, this results in key accuracy indicators such as workpiece coaxiality and circular runout failing to meet standards, causing problems such as excessive clearance or incompatibility during subsequent assembly. Existing fixtures generally adopt a single-point or few-point clamping design, resulting in uneven clamping force distribution. Under the strong cutting vibration and impact force of heavy-duty machining, local stress concentration is prone to occur, leading to workpiece deformation or surface damage. At the same time, the clamping force control precision is low. If the clamping force is insufficient, the workpiece is prone to slippage or even falling off, posing a serious safety hazard. If the clamping force is too large, it will aggravate the plastic deformation of the workpiece and affect the machining quality. Existing fixtures are mostly customized for specific workpiece specifications and have a fixed clamping range. When processing large disc-shaped workpieces of different diameters and thicknesses, it is necessary to replace the main body of the fixture or the core clamping components. This not only results in high equipment investment costs but also cumbersome component switching processes, making it unsuitable for flexible production needs with multiple varieties and small batches.

[0004] To address the above problems, this invention proposes a durable fixture for heavy-duty machining of large disc-shaped workpieces. Summary of the Invention

[0005] To address the technical problems of insufficient centering accuracy, poor clamping stability, and poor versatility of existing heavy-duty machining fixtures for large disc-shaped workpieces, this invention proposes a durable fixture for heavy-duty machining of large disc-shaped workpieces.

[0006] This invention proposes a durable fixture for heavy-duty machining of large disc-shaped workpieces, comprising a circular support platform, with support legs arranged in an array at the lower end of the circular support platform, a centering mechanism arranged in an array at the upper end of the circular support platform, a protective plate arranged between two of the centering mechanisms, support blocks arranged in an array between the lower surface of the protective plate and the upper surface of the circular support platform, a clamping mechanism arranged in an array at the upper end of the circular support platform, a machining disc arranged directly above the center of the circular support platform, a mechanical gripper clamped on the outer side of the machining disc, and a lifting device externally connected to the upper end of the mechanical gripper; The centering mechanism is used to position the processing disc. The clamping mechanism is used to clamp the processing disc.

[0007] Preferably, the centering mechanism includes an array of sliding grooves formed on the upper end of the circular support platform. The upper end of the circular support platform is also provided with an array of centering grooves. Bearings are embedded in the inner walls of two opposite sides of the centering groove along its length. A lead screw is fixedly connected to the inner ring of the two bearings. A motor is fixedly connected to one end of the lead screw. A support rod is fixedly connected to the outer housing of the motor. The lower end of the support rod is fixedly connected to the surface of the support foot. A guide block is fixedly connected to the upper end of the lead screw nut that slides on the surface of the lead screw. Protrusions are provided on both sides of the lead screw nut. The surfaces of the protrusions are connected to the inner walls of the centering grooves.

[0008] Preferably, the clamping mechanism includes a fixed tube slidably connected to the center of the circular support platform, an ∞-shaped fixing ring fixedly sleeved on the outer surface of the fixed tube, a hydraulic motor fixedly connected to the inner wall of one end of the fixing ring, a helical gear rod fixedly connected to the output shaft end of the hydraulic motor, a main bearing fixedly connected to the lower end of the fixed tube, a gear ring fixedly connected to the lower end of the outer ring of the main bearing, the surface of the gear ring meshing with the tooth surface of the helical gear rod, a threaded column slidably connected to the inner wall of the lower end of the fixed tube, and the inner wall of the fixed tube and the upper end of the threaded column elastically connected by a spring.

[0009] Preferably, the inner wall of the gear ring is configured as a threaded surface, and the outer surface of the threaded post is provided with a thread that matches the inner wall of the gear ring.

[0010] Preferably, the outer surface of the fixed tube is rotatably connected to a connecting rod array, one end of the connecting rod is rotatably connected to a cross slider, the outer surface of the cross slider is slidably connected to the inner wall of the groove, the upper end of the cross slider is fixedly connected to a hydraulic cylinder, one end of the hydraulic cylinder is fixedly connected to a limit plate, one end of the telescopic rod of the hydraulic cylinder is fixedly sleeved with a connecting ring, the outer surface of the connecting ring is axially symmetrically fixedly connected to a fixing post, one end of the fixing post is fixedly connected to the surface of the limit plate.

[0011] Preferably, an electric motor is symmetrically arranged on the side of the limiting plate, the surface of the electric motor is fixedly connected to the surface of the limiting plate, the electric motor is located at the upper end of the fixed column, a bevel gear set is arranged at the upper end of the electric motor, the two bevel gears of the bevel gear set mesh at right angles, and the output shaft of the electric motor is fixedly connected to one end of the horizontal bevel gear of the bevel gear set.

[0012] Preferably, a worm is fixedly connected to one side of the vertical bevel gear of the bevel gear set. The middle position of the worm is fixedly connected to the upper end of the limiting plate through a bearing base. The surface of the worm wheel meshes with the worm. A threaded rod is fixedly connected to the lower end of the worm. The upper and lower ends of the threaded rod are rotatably connected to the limiting plate through bearings. A rectangular groove is symmetrically opened on the contact surface between the limiting plate and the processing disk. An arc-shaped pressing strip is slidably connected to the inner wall of the rectangular groove. One end of the pressing strip is threadedly connected to the outer surface of the threaded rod.

[0013] Preferably, the surface of the guide block is coated with a lubricating layer, and a pressure sensor is provided on the inclined surface of the guide block.

[0014] Preferably, the inner arc surface array of the pressing strip is integrally formed with hemispherical anti-slip protrusions, and the outer surface of the anti-slip protrusions is wrapped with a polyurethane elastic wear-resistant pad layer, and the surface of the elastic wear-resistant pad layer is provided with cross-shaped anti-slip patterns.

[0015] The beneficial effects of this invention are as follows: 1. By setting up a motor-driven lead screw transmission in the centering mechanism, combined with the inclined surface guidance of the guide block and the feedback of the pressure sensor, the automated centering and positioning of large disc-shaped workpieces can be achieved. The pressure sensor can detect the contact pressure between the guide block and the processing disc in real time, avoiding workpiece deformation caused by over-positioning. At the same time, the high-precision characteristics of the lead screw transmission ensure that multiple guide blocks move together synchronously, so that the center of the processing disc and the center of the circular support platform are precisely coincident, providing a stable reference for heavy-duty processing and significantly improving the dimensional accuracy and coaxiality of the workpiece.

[0016] 2. By setting up a clamping mechanism, a hydraulic motor drives a helical gear rod to mesh with a gear ring. Combined with the threaded connection between the gear ring and the threaded column, and the elastic buffering effect of the spring, the connecting rod outside the fixed tube synchronously drives the cross slider to slide smoothly along the slide groove. This allows multiple sets of limiting plates to synchronously move towards the center of the processing disc, forming a multi-point uniform clamping layout. This ensures balanced force on the workpiece during heavy-duty processing, fundamentally preventing workpiece deformation caused by localized stress concentration. Simultaneously, the hydraulic cylinder can flexibly adjust its extension and retraction stroke to adapt to large disc-shaped workpieces of different diameters. The electric motor changes the transmission direction through a bevel gear set, driving the threaded rod to move the arc-shaped... The pressing strip slides up and down along the rectangular groove of the limiting plate, allowing it to precisely conform to the outer curved surface of the processing disc. This significantly improves the clamping fit and friction, effectively resisting vibration and impact during heavy-duty cutting and preventing workpiece displacement or loosening. Furthermore, the clamping mechanism uses a combination of gear and hydraulic transmission for powerful and precisely adjustable clamping force. Combined with the structure's self-locking characteristics, it not only meets the stringent requirements for clamping stability during heavy-duty processing but also avoids excessive clamping force that could damage the workpiece surface. At the same time, the transmission components reduce wear through bearings and self-lubricating structures, extending the service life of the mechanism and further ensuring the continuity and reliability of the processing.

[0017] 3. Combining the benefits of 1 and 2, the process of workpiece hoisting, centering and clamping is automated, reducing manual intervention and labor intensity. The linkage design of each mechanism shortens the workpiece clamping time. Especially for the bulky characteristics of large disc-shaped workpieces, it greatly improves the production efficiency of batch processing. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of a durable fixture for heavy-duty machining of large disc-shaped workpieces proposed in this invention; Figure 2 This is a front view of a durable fixture for heavy-duty machining of large disc-shaped workpieces proposed in this invention; Figure 3 This is a cross-sectional view of the circular support platform of a durable fixture for heavy-duty machining of large disc-shaped workpieces proposed in this invention; Figure 4 This is a diagram showing the installation position of the clamping mechanism of a durable fixture for heavy-duty machining of large disc-shaped workpieces proposed in this invention. Figure 5 This is a perspective view of the clamping mechanism of a durable fixture for heavy-duty machining of large disc-shaped workpieces proposed in this invention; Figure 6 This invention proposes a durable fixture for heavy-duty machining of large disc-shaped workpieces. Figure 5 Enlarged view of point A in the middle; Figure 7 This is a diagram showing the position of the connecting ring in a durable fixture for heavy-duty machining of large disc-shaped workpieces proposed in this invention.

[0019] In the diagram: 1. Support foot; 2. Circular support platform; 3. Protective plate; 30. Support block; 4. Centering mechanism; 40. Slide groove; 41. Centering groove; 42. Bearing; 43. Lead screw; 44. Motor; 45. Support rod; 46. Guide block; 5. Clamping mechanism; 51. Fixed tube; 52. Fixed ring; 53. Hydraulic motor; 54. Helical gear rod; 55. Main bearing; 56. Gear ring; 57. Threaded column; 58. Connecting rod; 59. Cross slider; 510. Hydraulic cylinder; 511. Limiting plate; 512. Connecting ring; 513. Fixed column; 514. Electric motor; 515. Bevel gear set; 516. Worm gear; 517. Worm wheel; 518. Threaded rod; 519. Pressing bar; 6. Processing disc; 7. Mechanical gripper. Detailed Implementation

[0020] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0021] Reference Figures 1-7 A durable fixture for heavy-duty machining of large disc-shaped workpieces includes a circular support platform 2. Support legs 1 are arranged in an array at the lower end of the circular support platform 2. Centering mechanisms 4 are arranged in an array at the upper end of the circular support platform 2. A protective plate 3 is arranged between two centering mechanisms 4. Support blocks 30 are arranged in an array between the lower surface of the protective plate 3 and the upper surface of the circular support platform 2. Clamping mechanisms 5 are arranged in an array at the upper end of the circular support platform 2. A machining disc 6 is arranged directly above the center of the circular support platform 2. Mechanical grippers 7 are clamped on the outer side of the machining disc 6. Lifting equipment is externally connected to the upper end of the mechanical grippers 7.

[0022] The centering mechanism 4 is used to position the processing disc 6.

[0023] The clamping mechanism 5 is used to clamp the processing tray 6.

[0024] In this embodiment, the centering mechanism 4 includes an array of sliding grooves 40 formed on the upper end of the circular support platform 2. The upper end of the circular support platform 2 is also provided with an array of centering grooves 41. Bearings 42 are embedded in the inner walls of two opposite sides of the centering grooves 41 along the length direction. A lead screw 43 is fixedly connected to the inner ring of the two bearings 42. A motor 44 is fixedly connected to one end of the lead screw 43. A support rod 45 is fixedly connected to the outer housing of the motor 44. The lower end of the support rod 45 is fixedly connected to the surface of the support foot 1. A guide block 46 is fixedly connected to the upper end of the lead screw nut that slides on the surface of the lead screw 43. Protrusions are provided on both sides of the lead screw nut, and the protruding surfaces are connected to the inner walls of the centering grooves 41.

[0025] Specifically, in the initial state, the guide blocks 46 are close to each other. After the motor 44 starts, it drives the lead screw 43 to rotate around the bearing 42. Under the action of thread transmission, the lead screw nut slides in the opposite direction along the length of the centering groove 41. Its two sides protrude and fit tightly against the inner wall of the centering groove 41, restricting the circumferential rotation of the lead screw nut and ensuring accurate movement direction. The guide block 46 moves synchronously with the lead screw nut, and its inclined surface faces the center of the processing disk 6. When the guide blocks 46 of multiple centering mechanisms 4 move away from the center in the opposite direction at the same time, the processing disk 6 slides along the side of the inclined surface and aligns with the center of the circular support platform 2. With the lubricating layer on the surface of the guide block 46, such as the molybdenum disulfide coating, the contact friction is reduced. The pressure sensor collects the contact pressure data in real time and feeds it back to the control system. At this time, the initial centering and positioning is completed.

[0026] In this embodiment, the clamping mechanism 5 includes a fixed tube 51 slidably connected to the center of the circular support platform 2. An ∞-shaped fixed ring 52 is fixedly sleeved on the outer surface of the fixed tube 51. A hydraulic motor 53 is fixedly connected to the inner wall of one end of the fixed ring 52. A helical gear rod 54 is fixedly connected to the output shaft end of the hydraulic motor 53. A main bearing 55 is fixedly connected to the lower end of the fixed tube 51. A gear ring 56 is fixedly connected to the lower end of the outer ring of the main bearing 55. The surface of the gear ring 56 meshes with the tooth surface of the helical gear rod 54. A threaded column 57 is slidably connected to the inner wall of the lower end of the fixed tube 51. The inner wall of the fixed tube 51 and the upper end of the threaded column 57 are elastically connected by a spring.

[0027] Specifically, the hydraulic motor 53 outputs torque to drive the helical gear rod 54 to rotate, which in turn drives the gear ring 56 to rotate around the outer ring of the main bearing 55 through tooth surface meshing. The inner ring of the main bearing 55 is fixed to the fixed tube 51, ensuring that the rotation of the gear ring 56 does not affect the initial position of the fixed tube 51. The threaded column 57 meshes with the threaded surface of the inner wall of the gear ring 56 through the thread on its outer surface. When the gear ring 56 rotates, it is converted into the threaded column 57 sliding axially along the inner wall of the fixed tube 51. The spring is always in a pre-compressed state, which not only buffers the impact force when the threaded column 57 slides, but also provides the reset power for the threaded column 57, realizing the elastic adjustment of the height of the fixed tube 51.

[0028] In this embodiment, the inner wall of the gear ring 56 is configured as a threaded surface, and the outer surface of the threaded post 57 is provided with a thread that matches the inner wall of the gear ring 56.

[0029] Specifically, the threads on the inner wall of the gear ring 56 and the external threads of the threaded column 57 adopt a trapezoidal thread structure, which has the characteristics of strong load-bearing capacity and good self-locking performance, and is suitable for the force requirements of heavy-duty processing. When the gear ring 56 rotates forward, the thread drive pushes the threaded column 57 to return to its original position along the inner wall of the fixed tube 51. When the gear ring 56 rotates in reverse, the spring releases elastic force to assist the threaded column 57 to extend downward. The threaded mating structure ensures that the axial displacement of the threaded column 57 corresponds precisely to the rotation angle of the gear ring 56, thereby realizing precise control of the opening and closing range of the clamping mechanism 5.

[0030] In this embodiment, a connecting rod 58 is rotatably connected to the outer surface of the fixed tube 51. A cross slider 59 is rotatably connected to one end of the connecting rod 58. The outer surface of the cross slider 59 is slidably connected to the inner wall of the slide groove 40. A hydraulic cylinder 510 is fixedly connected to the upper end of the cross slider 59. A limit plate 511 is fixedly connected to one end of the hydraulic cylinder 510. A connecting ring 512 is fixedly sleeved on the outer surface of one end of the telescopic rod of the hydraulic cylinder 510. A fixed post 513 is fixedly fixedly connected to the outer surface of the connecting ring 512 axially symmetrically. One end of the fixed post 513 is fixedly connected to the surface of the limit plate 511.

[0031] Specifically, when the fixed tube 51 moves up and down with the threaded column 57, it drives the connecting rod 58 to push and pull through the hinge point. The other end of the connecting rod 58 pushes the cross slider 59 to slide radially along the slide groove 40. The "cross" structure of the cross slider is adapted to the groove on the inner wall of the slide groove, which restricts its circumferential rotation and ensures smooth sliding. The hydraulic cylinder 510 can adjust the initial distance between the limiting plate 511 and the processing plate 6 by extending and retracting the telescopic rod, which can adapt to workpieces of different diameters. The connecting ring 512 and the fixed column 513 form a triangular stable support structure, which enhances the deformation resistance of the limiting plate 511 and prevents the limiting plate 511 from bending or shifting under heavy load, thus ensuring the uniform transmission of clamping force.

[0032] In this embodiment, an electric motor 514 is symmetrically arranged on the side of the limiting plate 511. The surface of the electric motor 514 is fixedly connected to the surface of the limiting plate 511. The electric motor 514 is located at the upper end of the fixed column 513. A bevel gear set 515 is arranged at the upper end of the electric motor 514. The two bevel gears of the bevel gear set 515 mesh at right angles. The output shaft of the electric motor 514 is fixedly connected to one end of the horizontal bevel gear of the bevel gear set 515.

[0033] Specifically, after the electric motor 514 starts, it outputs horizontal rotational power, which is transmitted to the horizontal bevel gear of the bevel gear set 515 through the coupling. By utilizing the right-angle meshing relationship of the two bevel gears, the horizontal power is converted into vertical rotational power, providing a directionally compatible power source for the subsequent transmission of the worm gear 516 and the threaded rod 518.

[0034] In this embodiment, a worm gear 516 is fixedly connected to one side of the vertical bevel gear of the bevel gear set 515. The middle position of the worm gear 516 is fixedly connected to the upper end of the limiting plate 511 through a bearing base. A worm wheel 517 meshes with the surface of the worm gear 516. A threaded rod 518 is fixedly connected to the lower end of the worm wheel 517. The upper and lower ends of the threaded rod 518 are rotatably connected to the limiting plate 511 through bearings. A rectangular groove is symmetrically opened on the contact surface between the limiting plate 511 and the processing disk 6. An arc-shaped pressing strip 519 is slidably connected to the inner wall of the rectangular groove. One end of the pressing strip 519 is threadedly connected to the outer surface of the threaded rod 518.

[0035] Specifically, the vertical bevel gear of the bevel gear set 515 drives the worm 516 to rotate around the bearing base. Through the meshing transmission between the worm 516 and the worm wheel 517, the rotational power is transmitted to the threaded rod 518. The threaded rod 518 rotates smoothly under the support of the bearings at both ends. One end of the arc-shaped pressing strip 519 is adapted to the threaded rod 518 through the internal thread. When the threaded rod 518 rotates, it is converted into the pressing strip 519 sliding up and down along the rectangular groove. The rectangular groove restricts the circumferential rotation of the pressing strip 519, ensuring that it only makes linear motion, thereby realizing the pressing strip clamping and fixing the processing disc 6 in the vertical direction, which, together with the clamping force in the horizontal direction, forms a three-dimensional clamping effect.

[0036] In this embodiment, the surface of the guide block 46 is coated with a lubricating layer, and a pressure sensor is provided on the inclined surface of the guide block 46.

[0037] Specifically, the lubrication layer on the surface of the guide block 46 is made of molybdenum disulfide-graphite composite lubricating material with a coating thickness of 0.03-0.08mm. It has the characteristics of high temperature resistance and wear resistance, which can significantly reduce the sliding friction coefficient between the guide block 46 and the surface of the processing disk 6, and reduce workpiece surface scratches during the centering process. The pressure sensor set on the inclined surface is a piezoelectric pressure sensor. Its detection surface is flush with the inclined surface of the guide block 46. Its range is adapted to the contact pressure range of 0-500N during the centering process. When the pressure values ​​of each pressure sensor no longer change, the initial centering and positioning work is completed.

[0038] In this embodiment, the inner arc surface array of the pressing strip 519 is integrally formed with hemispherical anti-slip protrusions, and the outer surface of the anti-slip protrusions is wrapped with a polyurethane elastic wear-resistant pad layer, and the surface of the elastic wear-resistant pad layer is provided with cross-shaped anti-slip patterns.

[0039] Specifically, the hemispherical anti-slip protrusion array increases the density of contact points with the surface of the processing disk; the polyurethane elastic wear-resistant pad has a thickness of 1-1.5mm, which has both a certain degree of elasticity to conform to the slight unevenness of the surface of the processing disk 6, and excellent wear resistance to resist frictional wear during heavy-duty processing; the cross-shaped anti-slip texture on the surface can effectively enhance the friction of the clamping surface, preventing the processing disk 6 from axial or circumferential slippage under the action of cutting vibration, while the elastic pad can buffer the clamping pressure and avoid causing indentations or damage to the workpiece surface.

[0040] Reference Figures 1-7 The clamping steps of a durable fixture for heavy-duty machining of large disc-shaped workpieces are as follows: Step 1: Start the external lifting equipment. Clamp the outer periphery of the worktable 6 with the mechanical grippers 7, and slowly lift the worktable 6 to a position directly above the center of the circular support platform 2. Adjust the position of the lifting equipment so that the initial landing point of the worktable 6 is within the range of the guide blocks 46 of the multiple centering mechanisms 4. Then, slowly lower the worktable 6 until the lower surface of the worktable 6 makes slight contact with the preset support surface on the circular support platform 2. Maintain the clamping state of the mechanical grippers 7 to complete the initial placement. Place the worktable 6 on the inclined surface of the guide blocks 46 so that the center of the worktable 6 is aligned with the center of the circular support platform 2. At the same time, the pressure sensor on the inclined surface of the guide blocks 46 collects the contact pressure data in real time and feeds it back to the control system. When the pressure values ​​of all guide blocks 46 reach the preset threshold and tend to stabilize, it indicates that the worktable 6 has been accurately centered. The control system issues a command to stop the motor 44, and the centering process is completed. Step 2: Start the motor 44 of the centering mechanism 4. The motor 44 drives the lead screw 43 to rotate around the bearing 42 in the centering groove 41. Under the action of the threaded transmission, the lead screw nut drives the guide block 46 to move synchronously in the opposite direction to the processing disk 6 along the centering groove 41 until the value of the pressure sensor is 0 and the surface of the guide block 46 is no longer in contact with the processing disk 6. Step 3: After centering is completed, when the other pressure sensor at the upper end of the fixed tube 51 is subjected to pressure, the hydraulic motor 53 and hydraulic cylinder 510 of the clamping mechanism 5 are simultaneously activated. The hydraulic motor 53 drives the helical gear rod 54 to rotate, which in turn rotates through meshing with the gear ring 56. The threaded surface of the gear ring 56 engages with the threaded post 57, pushing the fixed tube 51 downward. This, in turn, pulls the cross slider 59 along the slide groove 40 towards the center via the connecting rod 58, causing the limiting plate 511 to gradually approach the outer periphery of the processing disk 6. The telescopic rod of the hydraulic cylinder 510 extends, finely adjusting the distance between the limiting plate 511 and the processing disk 6 until the limiting plate 511... The inner side of 1 is initially tightly fitted to the side of the processing disk 6. Then, the electric motor 514 is started, and the transmission direction is changed through the bevel gear set 515, driving the worm gear 516 and worm wheel 517 to rotate, causing the threaded rod 518 to rotate. This causes the arc-shaped pressing strip 519 to slide along the rectangular groove of the limiting plate 511, tightly fitting the outer curved surface of the processing disk 6. The anti-slip protrusions on the inner arc surface of the pressing strip 519 and the elastic wear-resistant pad layer enhance the clamping friction through cross-shaped anti-slip patterns, forming a three-dimensional fixing effect of multi-point uniform clamping in the horizontal direction and pressing in the vertical direction. At this time, the mechanical jaw 7 is released, completing the entire clamping process, and the subsequent heavy-duty processing process can be started.

[0041] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A durable fixture for heavy-duty machining of large disc-shaped workpieces, characterized in that: Includes a circular support platform (2), with support feet (1) arranged in an array at the lower end of the circular support platform (2), and centering mechanisms (4) arranged in an array at the upper end of the circular support platform (2). A protective plate (3) is arranged between the two centering mechanisms (4), and support blocks (30) are arranged in an array between the lower surface of the protective plate (3) and the upper surface of the circular support platform (2). A clamping mechanism (5) is arranged in an array at the upper end of the circular support platform (2), and a processing plate (6) is arranged directly above the center of the circular support platform (2). A mechanical gripper (7) is clamped on the outer side of the processing plate (6), and a lifting device is connected to the upper end of the mechanical gripper (7). The centering mechanism (4) is used to position the processing disk (6); The clamping mechanism (5) is used to clamp the processing disk (6).

2. The durable fixture for heavy-duty machining of large disc-shaped workpieces according to claim 1, characterized in that: The centering mechanism (4) includes an array of grooves (40) formed on the upper end of the circular support platform (2). The upper end of the circular support platform (2) is also provided with an array of centering grooves (41). Bearings (42) are embedded in the inner walls of the two opposite sides of the centering groove (41) along the length direction. A lead screw (43) is fixedly connected to the inner ring of the two bearings (42). A motor (44) is fixedly connected to one end of the lead screw (43). A support rod (45) is fixedly connected to the outer shell of the motor (44). The lower end of the support rod (45) is fixedly connected to the surface of the support foot (1). A guide block (46) is fixedly connected to the upper end of the lead screw nut that slides on the surface of the lead screw (43). Protrusions are provided on both sides of the lead screw nut. The surface of the protrusions is connected to the inner wall of the centering groove (41).

3. The durable fixture for heavy-duty machining of large disc-shaped workpieces according to claim 2, characterized in that: The clamping mechanism (5) includes a fixed tube (51) slidably connected to the center of the circular support platform (2). An ∞-shaped fixed ring (52) is fixedly sleeved on the outer surface of the fixed tube (51). A hydraulic motor (53) is fixedly connected to the inner wall of one end of the fixed ring (52). A helical gear rod (54) is fixedly connected to the output shaft end of the hydraulic motor (53). A main bearing (55) is fixedly connected to the lower end of the fixed tube (51). A gear ring (56) is fixedly connected to the lower end of the outer ring of the main bearing (55).

4. A durable fixture for heavy-duty machining of large disc-shaped workpieces according to claim 3, characterized in that: The surface of the gear ring (56) meshes with the tooth surface of the helical gear rod (54), and a threaded column (57) is slidably connected to the inner wall of the lower end of the fixed tube (51). The inner wall of the fixed tube (51) and the upper end of the threaded column (57) are elastically connected by a spring.

5. A durable fixture for heavy-duty machining of large disc-shaped workpieces according to claim 4, characterized in that: The inner wall of the gear ring (56) is configured as a threaded surface, and the outer surface of the threaded column (57) is provided with a thread that matches the inner wall of the gear ring (56).

6. A durable fixture for heavy-duty machining of large disc-shaped workpieces according to claim 5, characterized in that: The outer surface of the fixed tube (51) is rotatably connected to a connecting rod (58). One end of the connecting rod (58) is rotatably connected to a cross slider (59). The outer surface of the cross slider (59) is slidably connected to the inner wall of the slide groove (40). The upper end of the cross slider (59) is fixedly connected to a hydraulic cylinder (510). One end of the hydraulic cylinder (510) is fixedly connected to a limit plate (511). One end of the telescopic rod of the hydraulic cylinder (510) is fixedly sleeved with a connecting ring (512). The outer surface of the connecting ring (512) is axially symmetrically connected to a fixed column (513). One end of the fixed column (513) is fixedly connected to the surface of the limit plate (511).

7. A durable fixture for heavy-duty machining of large disc-shaped workpieces according to claim 6, characterized in that: An electric motor (514) is symmetrically arranged on the side of the limiting plate (511). The surface of the electric motor (514) is fixedly connected to the surface of the limiting plate (511). The electric motor (514) is located at the upper end of the fixed column (513). A bevel gear set (515) is arranged at the upper end of the electric motor (514). The two bevel gears of the bevel gear set (515) mesh at right angles. The output shaft of the electric motor (514) is fixedly connected to one end of the horizontal bevel gear of the bevel gear set (515).

8. A durable fixture for heavy-duty machining of large disc-shaped workpieces according to claim 7, characterized in that: A worm (516) is fixedly connected to one side of the vertical bevel gear of the bevel gear set (515). The middle position of the worm (516) is fixedly connected to the upper end of the limiting plate (511) through a bearing base. A worm wheel (517) meshes with the surface of the worm (516). A threaded rod (518) is fixedly connected to the lower end of the worm wheel (517). The upper and lower ends of the threaded rod (518) are rotatably connected to the limiting plate (511) through bearings. A rectangular groove is symmetrically opened on the contact surface between the limiting plate (511) and the processing disk (6). An arc-shaped pressing strip (519) is slidably connected to the inner wall of the rectangular groove. One end of the pressing strip (519) is threadedly connected to the outer surface of the threaded rod (518).

9. A durable fixture for heavy-duty machining of large disc-shaped workpieces according to claim 8, characterized in that: The surface of the guide block (46) is coated with a lubricating layer, and a pressure sensor is provided on the inclined surface of the guide block (46).

10. A durable fixture for heavy-duty machining of large disc-shaped workpieces according to claim 9, characterized in that: The inner arc surface array of the pressing strip (519) is integrally formed with hemispherical anti-slip protrusions, and the outer surface of the anti-slip protrusions is wrapped with a polyurethane elastic wear-resistant pad layer, and the surface of the elastic wear-resistant pad layer is provided with cross-shaped anti-slip patterns.

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