A drive device for a multi-axis synchronous machining center for cutting corners in ultra-high voltage equipment.

Abstract

This invention relates to the field of corner cutting technology, specifically to a drive device for a multi-axis synchronous machining center for corner cutting of ultra-high voltage equipment. The device includes a rotary drive assembly, a connecting assembly, and a hydraulic locking assembly. The rotary drive assembly is connected to a mounting frame, and the connecting assembly is connected between the rotary drive assembly and the shear head. The hydraulic locking assembly is mounted on the mounting frame. The shear head rotation angle can be more precisely adjusted via a worm gear. After adjustment to the desired angle, the worm gear's characteristics enable self-locking. During the punching and shearing process, the friction push plate at the lower end of the hydraulic push rod and the locking plate at the upper end of the shear head will press together, and the locking effect gradually improves as the punching and shearing force increases, ensuring that the shear head does not deflect during punching and shearing, thus improving corner cutting accuracy. This invention solves the problem that when cutting high-strength angle steel, the shear head rotation axis deflects under the punching and shearing force, and the servo motor and reducer cannot provide sufficient rigidity to prevent deflection, leading to a decrease in corner cutting accuracy.

Description

Technical Field

[0001] This invention relates to the field of corner cutting technology, and more specifically to a drive device for a multi-axis synchronous machining center for corner cutting of ultra-high voltage equipment. Background Technology

[0002] Ultra-high voltage (UHV) transmission towers are support structures specifically designed for UHV power transmission. The tower body is typically made of high-strength angle steel, and its connection nodes require precise chamfering to ensure the tower's installation accuracy, load-bearing capacity, and service life.

[0003] To achieve efficient and precise angle cutting of high-strength large angle steel, multi-axis synchronous CNC angle cutting machines are typically used. These machines usually include an X-axis responsible for feeding the angle steel, and Y and Z axes responsible for the lateral and vertical movement of the cutting tool. When cutting angle steel, the angle usually needs to be changed according to design requirements. However, current angle cutting machines typically use fixed angles such as 45° and 90°. Adjusting the angle requires stopping the machine for debugging, which reduces production efficiency. To achieve angle cutting operations with arbitrary angle adjustment, existing technologies have proposed a solution that can adjust the cutting tool angle, such as a new type of CNC angle cutting machine with patent number CN204818896U, which adjusts the saw head by setting it on the electric spindle. In existing technologies, the drive device used for the rotating axis mainly includes a servo motor and a high-precision reducer. An angle command is issued by the CNC system, the servo motor rotates at high speed, and the speed is reduced and the torque is increased by the reducer. The rotating head is driven to swing to the specified angle, and then the torque of the servo motor and the self-locking ability of the reducer are used to fix the position for punching and shearing.

[0004] While existing drive devices can achieve arbitrary angle adjustment, heavy-duty punching and shearing of large-sized, thick-walled, high-strength materials such as angle steel for ultra-high voltage towers requires hydraulic punching and shearing to release hundreds of tons of shearing force within tens to hundreds of milliseconds. This generates a huge reaction force on the rotating shaft. The servo motor maintains torque mainly by having the controller send a reverse torque to correct for minute displacements detected by the encoder. This process has hysteresis, which still leads to angle deviation. Furthermore, the flexible wheels or eccentric bearings inside the reducer are elastic bodies. They undergo minute torsional deformation like springs. When the punching and shearing torque is applied, the rotating shaft will deflect slightly. When the torque is unloaded, it will spring back, failing to provide sufficient rigidity. This will lead to a decrease in cutting angle accuracy.

[0005] In view of the above, in order to overcome the above technical problems, the present invention designs a drive device for a multi-axis synchronous machining center for cutting corners of ultra-high voltage equipment. Summary of the Invention

[0006] This invention provides a drive device for a multi-axis synchronous machining center for cutting corners in ultra-high voltage equipment. It solves the problem that when cutting corners of high-strength angle steel, the rotating shaft of the shear head deflects under the shearing force, and the servo motor and reducer cannot provide sufficient rigidity to prevent this deflection, leading to a decrease in cutting accuracy. By designing the shear head and hydraulic push rod as a separate structure, the shear head can more precisely adjust the angle under the action of the worm gear. After adjusting to the required angle, the worm gear's characteristics enable self-locking. During the shearing process, the friction push plate at the lower end of the hydraulic push rod and the locking plate at the upper end of the shear head will contact each other, forming a locking effect. Combined with the self-locking effect of the worm gear, this ensures that the shear head will not deflect during shearing, improving cutting accuracy.

[0007] To achieve the above objectives, the present invention provides the following technical solution:

[0008] A drive device for a multi-axis synchronous machining center for cutting corners in ultra-high voltage equipment includes a hydraulic station, a hydraulic cylinder, and a Y-axis drive assembly; it also includes a mounting frame, a rotary drive assembly, a connecting assembly, a shearing head, and a hydraulic locking assembly; the mounting frame is connected to the Y-axis drive assembly; the rotary drive assembly is connected to the mounting frame, and when the rotary drive assembly rotates, it drives the shearing head to rotate; the connecting assembly connects the rotary drive assembly and the shearing head; the hydraulic locking assembly is mounted on the mounting frame, and when punching and shearing are performed, the hydraulic locking assembly increases the thrust on the shearing head; when the shearing head tends to rotate, the hydraulic locking assembly and the rotary drive assembly generate a counter-torque to prevent rotation.

[0009] Preferably, the rotary drive assembly includes a fixed shaft, a servo motor, a worm gear, and a worm wheel; the fixed shaft is connected to the lower end of the hydraulic locking assembly; the servo motor is mounted on a mounting bracket; the worm gear is connected to the servo motor; and the worm wheel cooperates with the worm gear and is rotatably mounted on the fixed shaft.

[0010] In the above scheme, the servo motor drives the worm gear to rotate, which in turn drives the worm wheel to rotate. The worm wheel then drives the shear head to rotate together to complete the angle adjustment. On the one hand, when the worm gear acts as the driving component, it can achieve a large transmission ratio, thereby significantly reducing the angle rotated by the servo motor. This improves the angle resolution and positioning accuracy of the entire drive system, allowing the control system to control the angle of the shear head more precisely. In addition, after the large transmission ratio reduction, the slight vibrations and errors of the servo motor during operation can be reduced proportionally, making the rotation of the shear head more stable and smooth, ensuring that the subsequent punching and shearing processing accuracy meets the standards. On the other hand, due to the self-locking characteristics of the worm gear, self-locking is ensured after adjustment, preventing the shear head from deflecting under its own weight. It also ensures the stability of the shear head during heavy-load punching and shearing operations, thereby ensuring the punching and shearing processing accuracy.

[0011] Preferably, the connecting assembly includes a through-groove, a connecting block, an annular groove, a rotating ring block, and a rotating spring; the through-groove is formed on the worm gear; the connecting block slides through the through-groove and is connected to the upper end of the shear head; the annular groove is formed on the outer ring of the fixed shaft; the rotating ring block is rotatably mounted in the annular groove; and the rotating spring is connected between the rotating ring block and the upper end of the shear head.

[0012] In the above scheme, the shear head and worm gear are connected by a connecting block, so that the rotation of the worm gear can drive the shear head to rotate together. The through-slot ensures that the worm gear does not need to move during punching and shearing, while the connecting block can slide with the shear head in the through-slot, ensuring the normal operation of the punching and shearing motion. The rotating spring can rotate with the shear head and keep the shear head in a retracted state when the shear head is not punching and shearing. The rotating spring is located at the upper end of the shear head, so it can ensure the rigidity of the force transmission path when the shear head is pushed during punching and shearing. Compared with other arrangements, it can avoid the instability caused by non-rigid punching and shearing.

[0013] Preferably, the hydraulic locking assembly includes a hydraulic cylinder, a propulsion groove, a hydraulic push rod, and a friction element; the hydraulic cylinder is mounted on a mounting bracket; the propulsion groove is formed along the axis of a fixed shaft; the hydraulic push rod is slidably mounted within the propulsion groove; and the friction element is connected to the hydraulic push rod.

[0014] In the above scheme, when punching and shearing, the hydraulic push rod slides and pushes the shear head to punch and shear. During the punching and shearing process, the hydraulic push rod will gradually increase the thrust on the shear head. At this time, the friction between the two will increase synchronously. With the self-locking effect of the worm gear, it can further ensure that the shear head will not deflect during the punching and shearing process. The friction component can further increase the friction force, thereby counteracting the torsional torque.

[0015] Preferably, the friction component includes a friction pusher and a locking plate; the friction pusher is connected to the lower end of the hydraulic push rod; the locking plate is connected to the upper end of the shear head, and the upper surface of the locking plate and the lower surface of the friction pusher are provided with mutually cooperating locking serrations arranged in a circumferential array.

[0016] In the above scheme, the locking serrations on the friction push plate and the locking plate can produce a limiting effect and friction after they come into contact. The locking serrations can further amplify the original locking effect, so that even when punching and shearing high-strength angle steel, the shearing head can be guaranteed not to deflect.

[0017] Preferably, the locking saw teeth are radial V-shaped teeth, and the number of teeth is set to 24.

[0018] In the above scheme, after the locking teeth on the friction push plate and the locking plate mesh with each other, the friction push plate cannot rotate, which will have a limiting effect on the locking plate. During the punching and shearing process, the clamping force between the two will gradually increase, thereby ensuring that the friction force between the two will also gradually increase, ensuring that the friction push plate and the locking plate will not disengage due to torsional torque. Since the angle of angle steel cutting is usually a multiple of 15° (such as 30°, 45°, 60° and 90°), setting the number of teeth to 24 can ensure that after the shearing head angle is adjusted to the required cutting angle, the friction push plate and the locking plate can mesh after being pushed to the contact state. If other special angles are required, the number of teeth can be set to 360, at which time the shearing head can be adjusted to more angles.

[0019] Preferably, a limiting groove is formed on the inner surface of the upper end of the propulsion groove; a limiting protrusion is provided on the outer wall of the hydraulic push rod; the limiting protrusion is slidably installed in the limiting groove.

[0020] In the above scheme, the limiting action between the limiting groove and the limiting protrusion can ensure that the hydraulic push rod will not rotate when it is sliding forward, and the hydraulic push rod is used as the locking source for the shear head to further ensure the reliability of the locking effect.

[0021] Preferably, the friction element, shear head, and hydraulic push rod are all made of powder metallurgy high-speed steel.

[0022] In the above scheme, since the angle steel used in the assembly of UHV transmission towers is usually of high strength, it is necessary to use high-hardness and high-strength shearing heads. Powder metallurgy high-speed steel has good toughness, wear resistance and strength, and can withstand great contact stress without plastic deformation. When used in friction parts, it can ensure that the tooth surface can withstand greater contact stress, and the tooth root is less likely to produce micro-cracks and breakage under shearing impact torque. In addition, the wear of the tooth surface is negligible in long-term meshing and disengagement cycles, thus extending the service life.

[0023] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0024] 1. Compared to existing corner cutting machines, this invention uses a worm gear to drive the shear head to rotate. On the one hand, it achieves a larger transmission ratio, significantly reducing the rotation angle of the servo motor, thereby improving the angle resolution and positioning accuracy of the entire drive system. Furthermore, the deceleration effect of the large transmission ratio can proportionally reduce the small vibrations and errors during the operation of the servo motor, further improving the positioning accuracy of the shear head. On the other hand, the self-locking characteristic of the worm gear ensures that the shear head can achieve self-locking after the angle adjustment is completed, preventing it from deflecting under its own weight. During the dynamic and static processes of heavy-duty punching and shearing, the stability of the shear head can also be guaranteed, thus ensuring the punching and shearing processing accuracy.

[0025] 2. This invention designs the shear head and hydraulic push rod as a separate structure. During punching and shearing, by increasing the thrust on the shear head, the locking serrations on the friction push plate and locking plate can synchronously increase the friction and produce a limiting effect as the punching and shearing force increases. Combined with the self-locking effect of the worm gear, this ensures that the shear head does not deflect when punching and shearing high-strength angle steel. Furthermore, the friction components, shear head, and hydraulic push rod are manufactured using powder metallurgy high-speed steel. Powder metallurgy high-speed steel has good toughness, wear resistance, and strength, can withstand great contact stress, extends service life, and thus ensures processing accuracy.

[0026] 3. This invention features a through-groove and a rotating spring on the worm gear. This allows the worm gear to rotate, driving the shear head and the rotating spring together. The through-groove ensures that the worm gear does not need to move during punching and shearing, while the connecting block slides within the groove with the shear head, guaranteeing normal punching and shearing operation. After shearing, the rotating spring drives the shear head to reset. Since the rotating spring is connected to the upper end of the shear head, it ensures complete rigidity between the shear head and the hydraulic push rod during punching and shearing, preventing any impact on the process. Furthermore, the rotating spring further ensures the pressing effect between the friction push plate and the locking plate, guaranteeing locking and limiting effects and improving processing accuracy. Attached Figure Description

[0027] To more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0028] Figure 1 This is a schematic diagram of the overall structure of the present invention assembled on a machining center;

[0029] Figure 2 This is a schematic diagram of the main structure of the present invention;

[0030] Figure 3 This is an exploded view of the shear head and rotary drive assembly of the present invention;

[0031] Figure 4 for Figure 3 Enlarged view of the structure at point A in the middle;

[0032] Figure 5 This is a cross-sectional view of the present invention;

[0033] Figure 6 for Figure 5 Enlarged view of the structure at point B in the middle;

[0034] Figure 7 This is a schematic diagram of the shear head and locking disc structure of the present invention;

[0035] Figure 8 This is a schematic diagram of the hydraulic push rod and friction push plate structure of the present invention.

[0036] In the diagram: 1. Hydraulic station; 2. Y-axis drive assembly; 3. Mounting bracket; 4. Rotary drive assembly; 41. Fixed shaft; 42. Servo motor; 43. Worm gear; 44. Worm wheel; 5. Connecting assembly; 51. Through-slot; 52. Connecting block; 53. Annular slot; 54. Rotary ring block; 55. Rotating spring; 6. Shear head; 7. Hydraulic locking assembly; 71. Hydraulic cylinder; 72. Propulsion slot; 721. Limiting slot; 73. Hydraulic push rod; 731. Limiting protrusion; 74. Friction component; 741. Friction push plate; 742. Locking plate; 7421. Locking serration; 8. Control system. Detailed Implementation

[0037] To better understand the above technical solutions, the following will provide a detailed explanation of the technical solutions in conjunction with the accompanying drawings and specific implementation methods.

[0038] Please see Figures 1 to 8 This invention provides a drive device for a multi-axis synchronous machining center for cutting corners in ultra-high voltage equipment. The technical solution is as follows:

[0039] As a specific embodiment of the present invention, refer to Figure 1 and Figure 2 A drive device for a multi-axis synchronous machining center for cutting corners in ultra-high voltage equipment includes a hydraulic station 1 and a Y-axis drive assembly 2; it also includes a mounting frame 3, a rotary drive assembly 4, a connecting assembly 5, a shearing head 6, and a hydraulic locking assembly 7; the mounting frame 3 is connected to the Y-axis drive assembly 2; the rotary drive assembly 4 is connected to the mounting frame 3, and when the rotary drive assembly 4 rotates, it drives the shearing head 6 to rotate; the connecting assembly 5 connects the rotary drive assembly 4 and the shearing head 6; the hydraulic locking assembly 7 is mounted on the mounting frame 3, and when punching and shearing, the hydraulic locking assembly 7 increases the thrust on the shearing head 6, and when the shearing head 6 tends to rotate, the hydraulic locking assembly 7 and the rotary drive assembly 4 generate a counter-torque to prevent rotation; the hydraulic station 1 and the hydraulic locking assembly 7 are connected by an oil pipe, and the control system 8 is electrically connected to the rotary drive assembly 4 and the hydraulic locking assembly 7, and the control system 8 controls the rotary drive assembly 4 and the hydraulic locking assembly 7.

[0040] As a specific embodiment of the present invention, refer to Figure 2 and Figure 3The rotary drive assembly 4 includes a fixed shaft 41, a servo motor 42, a worm gear 43, and a worm wheel 44; the fixed shaft 41 is connected to the lower end of the hydraulic locking assembly 7; the servo motor 42 is mounted on the mounting bracket 3; the worm gear 43 is connected to the servo motor 42 via a coupling; the worm wheel 44 cooperates with the worm gear 43 and is rotatably mounted on the fixed shaft 41. The servo motor 42 drives the worm gear 43 to rotate, which in turn drives the worm wheel 44 to rotate. The worm wheel 44 then drives the shear head 6 to rotate together to complete the angle adjustment. On the one hand, when the worm gear 43 acts as the driving component, it can achieve a large transmission ratio, thereby significantly reducing the angle rotated by the servo motor 42. This improves the angle resolution and positioning accuracy of the entire drive system, allowing the control system 8 to perform more precise control over the angle of the shear head 6. In addition, after the large transmission ratio reduction, the slight vibrations and errors of the servo motor 42 during operation can be reduced proportionally, making the rotation of the shear head 6 extremely smooth and stable, ensuring that the subsequent punching and shearing processing accuracy meets the standards. On the other hand, due to the self-locking characteristics of the worm wheel 44 and worm gear 43, self-locking is ensured after the adjustment is completed, preventing the shear head 6 from deflecting under its own weight. It also ensures the stability of the shear head 6 during heavy-load punching and shearing movements and stops, thereby ensuring the punching and shearing processing accuracy.

[0041] As a specific embodiment of the present invention, refer to Figure 3 , Figure 4 , Figure 5 and Figure 6 The connecting assembly 5 includes a through-rotary groove 51, a connecting block 52, an annular groove 53, a rotating ring block 54, and a rotating spring 55. The through-rotary groove 51 is formed on the worm gear 44. The connecting block 52 slides through the through-rotary groove 51 and is connected to the upper end of the shear head 6. The annular groove 53 is formed on the outer ring of the fixed shaft 41. The rotating ring block 54 is rotatably installed in the annular groove 53. The rotating spring 55 is connected between the rotating ring block 54 and the upper end of the shear head 6. The preload applied by the rotating spring 55 needs to ensure that the shear head 6 is in a fully retracted state when not performing punching and shearing. The shear head 6 and the worm gear 44 are connected by the connecting block 52, so that when the worm gear 44 rotates, it can drive the shear head 6 to rotate together. The through-rotation groove 51 ensures that the worm gear 44 does not need to move during punching and shearing, while the connecting block 52 can slide with the shear head 6 in the through-rotation groove 51 to ensure the normal operation of punching and shearing. The rotating spring 55 can rotate with the shear head 6, and when the shear head 6 is not punching and shearing, it can keep the shear head 6 in a retracted state. The rotating spring 55 is located at the upper end of the shear head 6, so it can ensure the rigidity of the force transmission path when the shear head 6 is pushed during punching and shearing. Compared with other arrangements, it can avoid the instability caused by non-rigid punching and shearing.

[0042] As a specific embodiment of the present invention, refer to Figure 5 and Figure 6 The hydraulic locking assembly 7 includes a hydraulic cylinder 71, a propulsion groove 72, a hydraulic push rod 73, and a friction element 74. The hydraulic cylinder 71 is mounted on the mounting bracket 3. The propulsion groove 72 is opened along the axis of the fixed shaft 41. The hydraulic push rod 73 is slidably installed in the propulsion groove 72. The friction element 74 is connected to the hydraulic push rod 73. When punching and shearing, the hydraulic push rod 73 slides and pushes the shear head 6 to punch and shear. During the punching and shearing process, the hydraulic push rod 73 will gradually increase the thrust on the shear head 6. At this time, the friction between the two will increase synchronously. With the self-locking effect of the worm gear 44 and worm 43, it can further ensure that the shear head 6 will not deflect during the punching and shearing process. The friction element 74 can further increase the friction, thereby counteracting the torsional torque.

[0043] As a specific embodiment of the present invention, refer to Figure 5 , Figure 6 , Figure 7 and Figure 8 The friction element 74 includes a friction pusher 741 and a locking plate 742. The friction pusher 741 is connected to the lower end of the hydraulic push rod 73. The locking plate 742 is connected to the upper end of the shearing head 6. The upper surface of the locking plate 742 and the lower surface of the friction pusher 741 are circumferentially arrayed with mutually cooperating locking serrations 7421. The locking serrations 7421 on the friction pusher 741 and the locking plate 742 can generate a limiting effect and friction after they come into contact. The locking serrations 7421 can further amplify the original locking effect, ensuring that the shearing head 6 will not deflect even when punching and shearing high-strength angle steel.

[0044] As a specific embodiment of the present invention, refer to Figure 5 , Figure 6 , Figure 7 and Figure 8The locking saw teeth 7421 are radial V-shaped teeth with 24 teeth. After the locking saw teeth 7421 on the friction push plate 741 and the locking plate 742 mesh with each other, the friction push plate 741 cannot rotate, thus limiting the locking plate 742. Furthermore, during the punching and shearing process, the clamping force between the two gradually increases, ensuring that the friction force between them also gradually increases. This prevents the friction push plate 741 and the locking plate 742 from disengaging due to torsional torque. The tooth profile angle of the locking saw teeth 7421 is preferably 60°, and the tooth height is 3mm. This angle provides sufficient meshing depth while also ensuring sufficient strength at the tooth root. Since the angle of angle steel cutting is usually a multiple of 15° (such as 30°, 45°, 60°, and 90°), setting the number of teeth to 24 ensures that after the shearing head 6 is adjusted to the required cutting angle, the friction push plate 741 and the locking plate 742 can mesh after being pushed to the contact state. If other special angles are required, the number of teeth can be set to 360, allowing the shear head 6 to be adjusted to more angles. Alternatively, another solution can be adopted (the locking force will be reduced, but the shear head 6 can rotate at any angle, improving processing accuracy). The locking saw teeth 7421 can be set as spirals with roughened surfaces. The locking force is provided by the friction between the locking saw teeth 7421. Since the locking saw teeth 7421 are spiral structures, they can ensure any rotation angle. When the friction push plate 741 and the locking plate 742 are pressed together, friction can be generated between the locking saw teeth 7421. This friction will gradually increase with the increase of the pushing force, thus ensuring the locking effect. The spiral locking saw teeth 7421 can be trapezoidal threads with a helix angle of 5° and a pitch of 4mm. The small helix angle is conducive to generating a strong self-locking friction torque.

[0045] As a specific embodiment of the present invention, refer to Figure 5 , Figure 6 and Figure 8 A limiting groove 721 is formed on the inner surface of the upper end of the propulsion groove 72; a limiting protrusion 731 is provided on the outer wall of the hydraulic push rod 73; the limiting protrusion 731 is slidably installed in the limiting groove 721. Through the limiting action between the limiting groove 721 and the limiting protrusion 731, it can be ensured that the hydraulic push rod 73 will not rotate when it is sliding forward, and the hydraulic push rod 73 serves as a locking source for the shear head 6, further ensuring the reliability of the locking effect.

[0046] As a specific embodiment of the present invention, refer to Figure 5 , Figure 6 , Figure 7 and Figure 8The friction component 74, shear head 6, and hydraulic push rod 73 are all made of powder metallurgy high-speed steel. Since the angle steel used in the assembly of ultra-high voltage transmission towers typically has high strength, a high-hardness, high-strength shear head 6 is required. Powder metallurgy high-speed steel possesses excellent toughness, wear resistance, and strength, and can withstand extremely high contact stress without plastic deformation. Its use in the friction component 74 ensures that the tooth surface can withstand greater contact stress, while the tooth root is less prone to micro-cracks and breakage under shearing impact torque. Furthermore, during long-term meshing and disengagement cycles, the wear on the tooth surface is negligible, extending its service life.

[0047] Workflow: When angle steel needs to be cut, the control system 8 sends a command to the servo motor 42. At this time, the servo motor 42 drives the worm gear 43 to rotate, and the worm gear 43 drives the worm wheel 44 to rotate. When the worm wheel 44 rotates, it passes through the rotating groove 51 and drives the shearing head 6 to rotate together through the connecting block 52. Through the transmission ratio of the worm gear 43 and the worm wheel 44, the rotation angle of the shearing head 6 can be precisely controlled, and the small angle deflection of the servo motor 42 can be greatly reduced, improving the angle resolution and positioning accuracy. After the angle adjustment is completed, the self-locking characteristics of the worm gear 43 and the worm wheel 44 will play a role, ensuring that the shearing head 6 will not deflect under its own weight and can remain stable during the dynamic and static process of heavy-duty punching and shearing.

[0048] During punching and shearing, hydraulic station 1 drives hydraulic cylinder 71 to work. At this time, hydraulic push rod 73 will slide. When hydraulic push rod 73 is pushed to the point where friction push plate 741 and locking plate 742 are pressed together, the locking serrations 7421 on friction push plate 741 and locking plate 742 will mesh. At this time, rotating spring 55 will further ensure the pressing effect between friction push plate 741 and locking plate 742. When shear head 6 contacts angle steel, the pressure between friction push plate 741 and locking plate 742 will increase rapidly. At this time, a large friction force will be generated between the two to ensure that the two will not skip teeth under the action of torsional force. Friction push plate 741 moves linearly with hydraulic push rod 73 and is limited. The slot 721 and the limiting protrusion 731 limit the rotation. At this time, the locking serration 7421 on the friction push plate 741 will have a limiting effect on the locking plate 742 and a frictional force that gradually increases with the punching and shearing force. At this time, the self-locking effect of the worm 43 and the worm wheel 44 is combined to achieve double locking, thereby effectively counteracting the torsional torque that the shearing head 6 may generate during the punching and shearing process, preventing the shearing head 6 from deflecting, and ensuring that the punching and shearing of high-strength angle steel can also guarantee the processing accuracy. Specifically, ASP-23 powder metallurgy high-speed steel can be used. It can be appropriately heat-treated, vacuum quenched at 1180℃, and then tempered three times at 560℃, so that the hardness of the tooth surface reaches HRC62-64.

[0049] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the present invention as defined by the appended claims and their equivalents.

Claims

1. A drive device for a multi-axis synchronous machining center for cutting corners in ultra-high voltage equipment, comprising a hydraulic station (1) and a Y-axis drive assembly (2); characterized in that: It also includes a mounting frame (3), a rotary drive assembly (4), a connecting assembly (5), a shear head (6), and a hydraulic locking assembly (7); the mounting frame (3) is connected to the Y-axis drive assembly (2); the rotary drive assembly (4) is connected to the mounting frame (3), and the rotary drive assembly (4) drives the shear head (6) to rotate when it rotates; the connecting assembly (5) is connected between the rotary drive assembly (4) and the shear head (6); the hydraulic locking assembly (7) is set on the mounting frame (3), and when punching and shearing, the hydraulic locking assembly (7) increases the thrust on the shear head (6), and when the shear head (6) has a tendency to rotate, the hydraulic locking assembly (7) and the rotary drive assembly (4) generate a reverse torque to prevent rotation; The rotary drive assembly (4) includes a fixed shaft (41), a servo motor (42), a worm (43), and a worm wheel (44). The hydraulic locking assembly (7) includes a hydraulic cylinder (71), a propulsion groove (72), a hydraulic push rod (73), and a friction element (74); the hydraulic cylinder (71) is mounted on the mounting bracket (3); the propulsion groove (72) is formed at the center of the fixed shaft (41); the hydraulic push rod (73) is slidably mounted in the propulsion groove (72); and the friction element (74) is connected to the hydraulic push rod (73). The friction element (74) includes a friction pusher (741) and a locking plate (742); the friction pusher (741) is connected to the lower end of the hydraulic push rod (73); the locking plate (742) is connected to the upper end of the shear head (6), and the upper surface of the locking plate (742) and the lower surface of the friction pusher (741) are provided with mutually cooperating locking serrations (7421) in a circumferential array.

2. The drive device for a multi-axis synchronous machining center for cutting corners in ultra-high voltage equipment according to claim 1, characterized in that: The fixed shaft (41) is connected to the lower end of the hydraulic locking assembly (7); the servo motor (42) is mounted on the mounting bracket (3); the worm (43) is connected to the servo motor (42); the worm wheel (44) cooperates with the worm (43) and is rotatably mounted on the fixed shaft (41).

3. The drive device for a multi-axis synchronous machining center for cutting corners in ultra-high voltage equipment according to claim 2, characterized in that: The connecting assembly (5) includes a through-rotating groove (51), a connecting block (52), an annular rotating groove (53), a rotating ring block (54), and a rotating spring (55); the through-rotating groove (51) is formed on the worm gear (44); the connecting block (52) slides through the through-rotating groove (51) and is connected to the upper end of the shear head (6); the annular rotating groove (53) is formed in the inner ring of the fixed shaft (41); the rotating ring block (54) is rotatably installed in the annular rotating groove (53); the rotating spring (55) is connected between the rotating ring block (54) and the upper end of the shear head (6).

4. The drive device for a multi-axis synchronous machining center for cutting corners in ultra-high voltage equipment according to claim 1, characterized in that: The locking saw teeth (7421) are radial V-shaped teeth with a tooth count of 24.

5. The drive device for a multi-axis synchronous machining center for cutting corners in ultra-high voltage equipment according to claim 1, characterized in that: A limiting groove (721) is provided on the inner surface of the upper end of the propulsion groove (72); a limiting protrusion (731) is provided on the outer wall of the hydraulic push rod (73); the limiting protrusion (731) is slidably installed in the limiting groove (721).

6. The drive device for a multi-axis synchronous machining center for cutting corners in ultra-high voltage equipment according to claim 4, characterized in that: The friction element (74), shear head (6) and hydraulic push rod (73) are all made of powder metallurgy high-speed steel.

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