Double-shaft numerical control rotary table and electric spark machine tool

Abstract

The invention belongs to the technical field of machining equipment, and discloses a double-shaft numerical control rotary table which comprises a base, a rotating unit and a supporting unit, a rotating workbench of the rotating unit can be connected with a clamping component to fix a workpiece to be machined, a rotating shaft can drive the rotating workbench to rotate, and a swing shaft drives the rotating workbench to swing through the rotating shaft. Therefore, multi-face machining of the to-be-machined workpiece is achieved, repeated clamping is avoided, the machining precision and the machining efficiency can be improved, and the supporting unit provides stable supporting for the rotating unit. The inner cavities of the swinging main body, the first supporting body and the second supporting body are all sealed cavities, and an external sealing gas source conveys sealing gas into the three sealed cavities, so that the sealing reliability of the cavities is ensured. The invention further provides an electric spark machine tool which comprises an oil groove and the double-shaft numerical control rotary table, the double-shaft numerical control rotary table is immersed in the machine tool liquid of the oil groove, the sealing effect of the double-shaft numerical control rotary table is effectively guaranteed, and the adaptability of the electric spark machine tool is improved.

Description

Technical Field

[0001] The invention relates to the technical field of machining equipment and its peripheral supporting facilities, in particular to a double-axis numerical control turntable and an electric spark machining machine tool. Background Art

[0002] EDM machines are often used to process parts with complex shapes, and CNC rotary tables for EDM machines play a vital role. CNC rotary tables for EDM machines can fix the workpiece while providing precise rotational motion and linking with other axes of the machine tool to achieve complex machining paths, thereby improving machining accuracy and efficiency.

[0003] Although the CNC rotary tables currently used for EDM on the market can realize basic functions, they all have the disadvantages of complex structure, large size and poor sealing performance, which reduces the practicality of the CNC rotary tables used for EDM and affects the adaptability of EDM machine tools. Summary of the invention

[0004] The purpose of the present invention is to provide a dual-axis CNC turntable and an EDM machine tool to solve the problems existing in the above-mentioned related technologies, simplify the dual-axis CNC turntable, enhance the sealing performance of the dual-axis CNC turntable, and improve the adaptability of the EDM machine tool.

[0005] To achieve the above object, the present invention provides the following solutions:

[0006] The present invention provides a dual-axis numerical control turntable, comprising a base and:

[0007] A rotating unit, the rotating unit comprising a swinging body, a swinging shaft, a rotating shaft and a rotating table, wherein a gap is provided between the swinging body and the base, the swinging shaft is arranged in the swinging body, one end of the rotating shaft is rotatably connected to the swinging shaft, the swinging shaft can drive the rotating shaft to swing, the other end of the rotating shaft is connected to the rotating table, the rotating axis of the swinging shaft is perpendicular to the rotating axis of the rotating shaft, and the rotating table can be connected to a workpiece to be processed;

[0008] A support unit, the support unit comprising a first support body and a second support body, the first support body and the second support body are both arranged on the base, and the swing body is rotatably arranged between the first support body and the second support body;

[0009] The swing body, the first support body and the second support body are all split structures, and sealing elements are provided at the connection parts of the three respectively, and the rotation connection parts of the first support body, the second support body and the swing body, so that the inner cavities of the swing body, the first support body and the second support body form a sealed cavity, and the inner cavities of the swing body, the first support body and the second support body are all connected to an external sealing gas source, and the external sealing gas source can transport sealing gas to the inner cavities of the swing body, the first support body and the second support body, and make the inner cavity air pressure of the swing body, the first support body and the second support body greater than the operating environment pressure of the dual-axis CNC turntable.

[0010] Preferably, the first support body comprises a first support shell and a first support cover plate, the first support cover plate is located at a side of the first support shell away from the swing body, the first support cover plate is detachably connected to the first support shell and a first sealing ring is arranged between the two;

[0011] The second support body includes a second support shell and a second support cover plate. The second support cover plate is located on a side of the second support shell away from the swing body. The second support cover plate is detachably connected to the second support shell and a second sealing ring is arranged therebetween.

[0012] Preferably, one end of the rotating shaft extending out of the swinging body is connected to an insulating connecting plate, and the insulating connecting plate is connected to the rotating worktable; in a plane perpendicular to the axis of the rotating shaft, the projection of the insulating connecting plate is located within the projection area of ​​the rotating worktable;

[0013] There is a gap between the bottom surface of the rotating worktable and the swinging body, and a third sealing ring is arranged between the two.

[0014] Preferably, the swing body has a mounting groove matched with the third sealing ring, and the third sealing ring is arranged in the mounting groove and abuts against the bottom surface of the rotating worktable; the third sealing ring is a star-shaped sealing ring.

[0015] Preferably, the rotating unit further comprises a swing shaft rotating actuator and a rotating shaft rotating actuator, wherein the swing shaft rotating actuator is arranged in the first supporting body, and the output end of the swing shaft rotating actuator is connected to the swing shaft to drive the swing shaft to rotate; the rotating shaft rotating actuator is arranged in the swinging body, and the output end of the rotating shaft rotating actuator is connected to the rotating shaft to drive the rotating shaft to rotate;

[0016] The rotating unit further comprises a follower shaft connected to the swing body, one end of the follower shaft away from the swing body rotatably extends into the second support body, and a bearing is arranged between the follower shaft and the second support body.

[0017] Preferably, a fourth sealing ring is provided between the axial end surface of the follower shaft and the swing body;

[0018] A fifth sealing ring is arranged between the radial circumferential surface of the follower shaft and the inner wall of the second support body, and the fifth sealing ring is a lip sealing ring.

[0019] Preferably, a limit switch is arranged in the second support body, and the rotation of the follower shaft can trigger the limit switch to limit the rotation range of the swing shaft.

[0020] Preferably, the inner cavities of the swing body, the first support body and the second support body are connected.

[0021] Preferably, the first support body is also connected to a regulating valve, and the regulating valve can be connected to the external sealing gas source, and the external sealing gas source can use the regulating valve to transport sealing gas to the inner cavity of the swing body, the first support body and the second support body.

[0022] The present invention also provides an electric spark machining machine, comprising an oil tank and the above-mentioned dual-axis CNC turntable, wherein the dual-axis CNC turntable is immersed in the machine tool liquid in the oil tank, and the inner cavity air pressure of the swinging body, the first support body and the second support body is greater than the machine tool liquid pressure in the oil tank.

[0023] Compared with the related art, the present invention has achieved the following technical effects: the dual-axis CNC turntable of the present invention comprises a base and a rotating unit and a supporting unit arranged on the base, the rotating unit comprises a swinging body, a swinging shaft, a rotating shaft and a rotating worktable, there is a gap between the swinging body and the base, the swinging shaft is arranged in the swinging body, one end of the rotating shaft is rotatably connected to the swinging shaft, the swinging shaft can drive the rotating shaft to swing, the other end of the rotating shaft is connected to the rotating worktable, the rotating axis of the swinging shaft is perpendicular to the rotating axis of the rotating shaft, and the rotating worktable can be connected to the workpiece to be processed; the supporting unit comprises a first supporting body and a second supporting body, the first supporting body and the second supporting body are both arranged on the base, the swinging body and the base are provided with a swinging shaft, the swinging shaft is arranged in the swinging body, one end of the rotating shaft is rotatably connected to the swinging shaft, the swinging shaft can drive the rotating shaft to swing, the other end of the rotating shaft is connected to the rotating worktable, the rotating axis of the swinging shaft is perpendicular to the rotating axis of the rotating shaft, and the rotating worktable can be connected to the workpiece to be processed; the supporting unit comprises a first supporting body and a second supporting body, the first supporting body and the second supporting body are both arranged on the base, the swinging body The main body is rotatably arranged between the first support body and the second support body; the swinging main body, the first support body and the second support body are all split structures, and the connection parts of the three respectively, and the rotating connection parts of the first support body, the second support body and the swinging main body are all provided with sealing elements, so that the inner cavities of the swinging main body, the first support body and the second support body form a sealed cavity, and the inner cavities of the swinging main body, the first support body and the second support body are all connected with an external sealing gas source, and the external sealing gas source can transport sealing gas to the inner cavities of the swinging main body, the first support body and the second support body, and make the inner cavity air pressure of the swinging main body, the first support body and the second support body greater than the operating environment pressure of the dual-axis CNC turntable.

[0024] The dual-axis CNC turntable of the present invention has a rotating table of a rotating unit that can be connected to a clamping component to fix the workpiece to be processed, and the rotating shaft can drive the rotating table to rotate. The swing shaft drives the rotating table to swing through the rotating shaft, thereby realizing multi-faceted processing of the workpiece to be processed, avoiding multiple clamping, and being beneficial to improving processing accuracy and processing efficiency. The swinging body of the present invention is rotatably arranged between the first support body and the second support body, ensuring the swinging stability of the swinging body, and the support unit provides stable support for the rotating unit. The swinging body, the first support body and the second support body of the present invention are all split structures, which facilitates the assembly of parts, and the inner cavities of the swinging body, the first support body and the second support body are all sealed cavities, and an external sealing gas source delivers sealing gas to the three sealed cavities to ensure the sealing reliability of the cavities.

[0025] The present invention also provides an electric spark machining machine, comprising an oil tank and the above-mentioned dual-axis CNC turntable, the dual-axis CNC turntable is immersed in the machine tool liquid in the oil tank, and the inner cavity air pressure of the swing body, the first support body and the second support body is greater than the machine tool liquid pressure in the oil tank, effectively ensuring the sealing effect of the dual-axis CNC turntable and improving the adaptability of the electric spark machining machine. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or related technologies, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0027] Figure 1 It is an axonometric schematic diagram of a dual-axis CNC turntable disclosed in an embodiment of the present invention;

[0028] Figure 2 A schematic top view of a dual-axis CNC turntable disclosed in an embodiment of the present invention;

[0029] Figure 3 for Figure 2 Schematic diagram of the cross section along the AA direction.

[0030] In the figure: 1. base; 2. swing body; 3. rotating workbench; 4. first support body; 401. first support shell; 402. first support cover; 5. first sealing ring; 6. second support body; 601. second support shell; 602. second support cover; 7. second sealing ring; 8. insulating connecting plate; 9. third sealing ring; 10. swing shaft rotation actuator; 11. rotating shaft rotation actuator; 12. follower shaft; 13. fourth sealing ring; 14. fifth sealing ring; 15. limit switch; 16. regulating valve; 17. carbon brush; 18. sealing pipe joint; 19. fixing hole; 20. arc surface depression. DETAILED DESCRIPTION

[0031] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0032] The purpose of the present invention is to provide a dual-axis CNC turntable and an EDM machine tool to solve the problems existing in the above-mentioned related technologies, simplify the dual-axis CNC turntable, enhance the sealing performance of the dual-axis CNC turntable, and improve the adaptability of the EDM machine tool.

[0033] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the present invention is further described in detail below with reference to the accompanying drawings and specific embodiments.

[0034] Embodiment 1

[0035] This embodiment provides a dual-axis CNC turntable. Figure 1-Figure 3, including a base 1 and a rotating unit and a supporting unit arranged on the base 1, the rotating unit including a swinging body 2, a swinging shaft, a rotating shaft and a rotating table 3, there is a gap between the swinging body 2 and the base 1, the swinging shaft is arranged in the swinging body 2, one end of the rotating shaft is rotatably connected to the swinging shaft, the swinging shaft can drive the rotating shaft to swing, the other end of the rotating shaft is connected to the rotating table 3, the rotating axis of the swinging shaft is perpendicular to the rotating axis of the rotating shaft, and the rotating table 3 can be connected to the workpiece to be processed; the supporting unit includes a first supporting body 4 and a second supporting body 6, the first supporting body 4 and the second supporting body 6 are both arranged on the base 1, the swinging body 2 is rotatably arranged between the first supporting body 4 and the first supporting body 6 Between the two support bodies 6; the swinging body 2, the first support body 4 and the second support body 6 are all split structures, and the connection parts of the three respectively, and the rotating connection parts of the first support body 4 and the second support body 6 with the swinging body 2 are all provided with sealing elements, so that the inner cavities of the swinging body 2, the first support body 4 and the second support body 6 form a sealed cavity, and the inner cavities of the swinging body 2, the first support body 4 and the second support body 6 are all connected with the external sealing gas source, and the external sealing gas source can transport sealing gas to the inner cavities of the swinging body 2, the first support body 4 and the second support body 6, and make the inner cavity air pressure of the swinging body 2, the first support body 4 and the second support body 6 greater than the operating environment pressure of the dual-axis CNC turntable.

[0036] In the dual-axis CNC turntable of the present invention, the rotating table 3 of the rotating unit can be connected with the clamping component to fix the workpiece to be processed, the rotating shaft can drive the rotating table 3 to rotate, and the swing shaft drives the rotating table 3 to swing through the rotating shaft, so as to realize multi-faceted processing of the workpiece to be processed, avoid multiple clamping, and help improve processing accuracy and processing efficiency. The swinging body 2 of the present invention is rotatably arranged between the first support body 4 and the second support body 6, ensuring the swing stability of the swinging body 2, and the support unit provides stable support for the rotating unit. The swinging body 2, the first support body 4 and the second support body 6 of the present invention are all split structures, which facilitates the assembly of parts, and the inner cavities of the swinging body 2, the first support body 4 and the second support body 6 are all sealed cavities, and the external sealing gas source transports sealing gas into the three sealed cavities to ensure the sealing reliability of the cavities.

[0037] It is also necessary to explain that, in actual application, the rotary table 3 can be provided with multiple groups of mounting holes, which can be used to connect with the clamping components to fix the workpiece to be processed; the mounting holes are provided in multiple groups, which is convenient for adjusting the installation position of the clamping components according to different processing requirements and different specifications of the workpiece to be processed. In addition, the structure and type selection of the clamping components are conventional means for those skilled in the art, and will not be repeated here.

[0038] Among them, the first support body 4 includes a first support shell 401 and a first support cover plate 402. The first support shell 401 is arranged on the base 1, and the first support cover plate 402 is located on the side of the first support shell 401 away from the swing body 2. The first support cover plate 402 and the first support shell 401 are detachably connected and a first sealing ring 5 is arranged between the two to ensure the sealing of the connection between the first support shell 401 and the first support cover plate 402.

[0039] Correspondingly, the second support body 6 includes a second support shell 601 and a second support cover plate 602. The second support shell 601 is arranged on the base 1. The second support cover plate 602 is located on the side of the second support shell 601 away from the swing body 2. The second support cover plate 602 is detachably connected to the second support shell 601 and a second sealing ring 7 is arranged between the two to ensure the sealing of the cavity of the second support body 6.

[0040] Since high voltage exists between the workpiece and the electrode and electric sparks are generated during EDM machining, in order to avoid damage to the rotating internal parts, one end of the rotating shaft extending out of the swinging body 2 is connected to an insulating connecting plate 8, and the insulating connecting plate 8 is connected to the rotating table 3; in a plane perpendicular to the axis of the rotating shaft, the projection of the insulating connecting plate 8 is located within the projection area of ​​the rotating table 3. It should also be noted here that the rotating table 3 has a carbon brush 17, one end of the carbon brush 17 is connected to the processing cable of the EDM machine tool, and the other end is connected to the rotating table 3. During the EDM machining process, high voltage and electric sparks are only generated between the machine tool electrode and the workpiece on the rotating table 3, which prolongs the service life of the device and improves the working safety factor of the EDM machine tool. It should be explained here that the principle of EDM machining is common knowledge for those skilled in the art and will not be repeated here.

[0041] In this specific embodiment, there is a gap between the bottom surface of the rotating table 3 and the swinging body 2, and a third sealing ring 9 is arranged between the two to ensure the sealing of the inner cavity of the swinging body 2. The swinging body 2 has a mounting groove adapted to the third sealing ring 9, and the third sealing ring 9 is arranged in the mounting groove and abuts against the bottom surface of the rotating table 3. The third sealing ring 9 is installed on the swinging body 2 to improve the structural stability of the third sealing ring 9; the third sealing ring 9 can be a star-shaped sealing ring to ensure sealing while avoiding affecting the rotation of the rotating table 3.

[0042] It should also be noted that the rotation unit also includes a swing shaft rotation actuator 10 and a rotating shaft rotation actuator 11. The swing shaft rotation actuator 10 is arranged in the first support body 4, and the output end of the swing shaft rotation actuator 10 is connected to the swing shaft to drive the swing shaft to rotate; the rotating shaft rotation actuator 11 is arranged in the swing body 2, and the output end of the rotating shaft rotation actuator 11 is connected to the rotating shaft to drive the rotating shaft to rotate. Among them, the swing shaft rotation actuator 10 includes a servo motor, a harmonic reducer and an absolute value photoelectric encoder. The servo motor drives the harmonic reducer to rotate, and finally the output shaft of the harmonic reducer drives the swing shaft and the swing body 2 to rotate. The absolute value photoelectric encoder detects the rotation speed and position data of the swing shaft and feeds it back to the controller for control. In other specific embodiments that can be realized by the present invention, the output shaft of the swing shaft rotation actuator 10 can also be used as the swing shaft, and the output end of the rotating shaft rotation actuator 11 can be used as the rotating shaft, so as to further simplify the structure of the dual-axis CNC turntable, reduce the volume of the dual-axis CNC turntable, and improve the adaptability of the dual-axis CNC turntable. The present invention uses an integrated rotary actuator to improve the transmission accuracy and efficiency as much as possible, with a small volume and large torque, avoiding the processing problem of the complex structure of the servo motor plus harmonic reducer. Secondly, compared with the existing servo motor plus reducer transmission mechanism, the transmission reduction structure of the present invention is cheaper, more stable and more reliable in structure while achieving the same transmission accuracy. Furthermore, the rotating shaft is directly connected to the rotating shaft rotary actuator 11, the main shaft works smoothly, and the rotation accuracy of the rotating shaft is guaranteed. It should also be noted here that the swing shaft rotary actuator 10 and the rotating shaft rotary actuator 11 can be electrically connected to an external power supply. In this specific embodiment, a sealing pipe joint 18 is provided on the first support body 4 to facilitate the swing shaft rotary actuator 10 and the rotating shaft rotary actuator 11 to be connected to an external power supply using a cable. The external power supply can be the power supply of an electric spark machining machine.

[0043] Specifically, the rotating unit also includes a follower shaft 12, which is connected to the swinging body 2. One end of the follower shaft 12 away from the swinging body 2 can be rotatably extended into the second support body 6. A bearing is arranged between the follower shaft 12 and the second support body 6. The follower shaft 12 can support the swinging shaft and the swinging body 2, reduce the friction coefficient of the swinging shaft and the swinging body 2 during movement, and ensure the swinging accuracy; the bearing can be an angular contact bearing or other types of bearings.

[0044] At the same time, a fourth sealing ring 13 is arranged between the axial end surface of the follower shaft 12 and the swing body 2 to ensure the sealing performance of the inner cavity of the swing body 2 .

[0045] Correspondingly, the follower shaft 12 rotates relative to the second support body 6, and a fifth sealing ring 14 is provided between the radial circumference of the follower shaft 12 and the inner wall of the second support body 6 to ensure the sealing of the inner cavity of the second support body 6. The fifth sealing ring 14 is a lip-shaped sealing ring to enhance the sealing effect. In practical applications, the shape and type of the sealing element can be adjusted according to the actual working conditions, while ensuring the sealing effect, improving the flexibility and adaptability of the device.

[0046] In order to improve the working safety factor of the dual-axis CNC turntable, a limit switch 15 is set in the second support body 6. The rotation of the follower shaft 12 can trigger the limit switch 15 to limit the rotation range of the swing shaft. When the swing body 2 rotates to the extreme position, the follower shaft 12 triggers the limit switch 15, and the touch block of the limit switch 15 touches its slide rod and then moves, sending a signal to the controller to stop the rotation of the swing shaft to prevent collision. The specific structure and working principle of the limit switch 15 and the controller are common means of those skilled in the art and will not be repeated here.

[0047] In other specific embodiments that can be realized by the present invention, the inner cavities of the swing body 2, the first support body 4 and the second support body 6 are connected, and the swing shaft and the rotating shaft can be set as a hollow structure to realize that the inner cavities of the swing body 2, the first support body 4 and the second support body 6 are connected, and the double sealing structure of the sealing element and the sealing gas can be realized by inputting the sealing gas into the inner cavity of the swing body 2, the first support body 4 or the second support body 6, thereby enhancing the sealing effect. Among them, the sealing gas can be selected from compressed air or other protective gases to avoid damage to internal components.

[0048] In order to facilitate the input of sealing gas into the inner cavity of the swing body 2, the first support body 4 or the second support body 6, the first support body 4 is also connected to a regulating valve 16, which can be connected to an external sealing gas source, and the external sealing gas source can use the regulating valve 16 to transport sealing gas to the inner cavity of the swing body 2, the first support body 4 and the second support body 6, thereby improving the convenience of operation of the dual-axis CNC turntable. In practical applications, an air pressure monitoring element can also be set at the regulating valve 16 to monitor the air pressure in the sealing cavity, so as to facilitate the operator to control the state of the dual-axis CNC turntable and improve the working safety of the dual-axis CNC turntable.

[0049] Embodiment 2

[0050] The present embodiment provides an electric spark machining machine tool, including an oil tank and also includes the dual-axis CNC turntable of embodiment one, the dual-axis CNC turntable is immersed in the machine tool liquid in the oil tank, and the inner cavity air pressure of the swing body 2, the first support body 4 and the second support body 6 is greater than the machine tool liquid pressure in the oil tank.

[0051] In practical applications, the oil tank is filled with kerosene, and the workpiece to be processed needs to be completely immersed in the kerosene, because spark discharge will be generated during processing, and kerosene can insulate the air from the spark. The dual-axis CNC turntable of the present invention is completely immersed in kerosene, and the workpiece to be processed is installed on the rotating worktable 3. The dual-axis CNC turntable requires good sealing. The double sealing structure of the sealing element combined with the sealing gas provided by the present invention can reliably ensure that the dual-axis CNC turntable can maintain the IP68 grade sealing performance for a long time and effectively, thereby improving the adaptability of the EDM machine tool.

[0052] In order to facilitate the installation and fixation of the dual-axis CNC turntable, a fixing hole 19 is provided on the base 1, and the dual-axis CNC turntable can be fixed in the oil tank by bolts. The fixing hole 19 is U-shaped, which reduces the difficulty of installation and positioning and improves the convenience of operation. In addition, in practical applications, an arc surface depression 20 can be provided on the base 1 to avoid affecting the rotation of the swing body 2, while increasing the distance between the swing body 2 and the base 1, thereby improving the convenience of operation of the dual-axis CNC turntable.

[0053] The present invention uses specific examples to illustrate the principles and implementation methods of the present invention. The above examples are only used to help understand the method and core ideas of the present invention. At the same time, for those skilled in the art, according to the ideas of the present invention, there will be changes in the specific implementation methods and application scope. In summary, the content of this specification should not be understood as limiting the present invention.

Claims

1. A dual-axis CNC turntable, characterized in that: It includes a base and: A rotating unit, the rotating unit comprising a swinging body, a swinging shaft, a rotating shaft and a rotating table, wherein a gap is provided between the swinging body and the base, the swinging shaft is arranged in the swinging body, one end of the rotating shaft is rotatably connected to the swinging shaft, the swinging shaft can drive the rotating shaft to swing, the other end of the rotating shaft is connected to the rotating table, the rotating axis of the swinging shaft is perpendicular to the rotating axis of the rotating shaft, and the rotating table can be connected to a workpiece to be processed; A support unit, the support unit comprising a first support body and a second support body, the first support body and the second support body are both arranged on the base, and the swing body is rotatably arranged between the first support body and the second support body; The swing body, the first support body and the second support body are all split structures, and sealing elements are provided at the connection parts of the three respectively, and the rotation connection parts of the first support body, the second support body and the swing body, so that the inner cavities of the swing body, the first support body and the second support body form a sealed cavity, and the inner cavities of the swing body, the first support body and the second support body are all connected to an external sealing gas source, and the external sealing gas source can transport sealing gas to the inner cavities of the swing body, the first support body and the second support body, and make the inner cavity air pressure of the swing body, the first support body and the second support body greater than the operating environment pressure of the dual-axis CNC turntable.

2. The dual-axis CNC turntable according to claim 1, characterized in that: The first support body comprises a first support shell and a first support cover plate, wherein the first support cover plate is located at a side of the first support shell away from the swing body, and the first support cover plate is detachably connected to the first support shell and a first sealing ring is arranged between the two; The second support body includes a second support shell and a second support cover plate. The second support cover plate is located on a side of the second support shell away from the swing body. The second support cover plate is detachably connected to the second support shell and a second sealing ring is arranged therebetween.

3. The dual-axis CNC turntable according to claim 1, characterized in that: An end of the rotating shaft extending from the swinging body is connected to an insulating connecting plate, and the insulating connecting plate is connected to the rotating worktable; in a plane perpendicular to the axis of the rotating shaft, the projection of the insulating connecting plate is located within the projection area of ​​the rotating worktable; There is a gap between the bottom surface of the rotating worktable and the swinging body, and a third sealing ring is arranged between the two.

4. The dual-axis CNC turntable according to claim 3, characterized in that: The swing body has a mounting groove matched with the third sealing ring, and the third sealing ring is arranged in the mounting groove and abuts against the bottom surface of the rotating worktable; the third sealing ring is a star-shaped sealing ring.

5. The dual-axis CNC turntable according to claim 1, characterized in that: The rotating unit further comprises a swing shaft rotating actuator and a rotating shaft rotating actuator, wherein the swing shaft rotating actuator is arranged in the first supporting body, and the output end of the swing shaft rotating actuator is connected to the swing shaft to drive the swing shaft to rotate; the rotating shaft rotating actuator is arranged in the swinging body, and the output end of the rotating shaft rotating actuator is connected to the rotating shaft to drive the rotating shaft to rotate; The rotating unit further comprises a follower shaft connected to the swing body, one end of the follower shaft away from the swing body rotatably extends into the second support body, and a bearing is arranged between the follower shaft and the second support body.

6. The dual-axis CNC turntable according to claim 5, characterized in that: A fourth sealing ring is provided between the axial end surface of the follower shaft and the swing body; A fifth sealing ring is arranged between the radial circumferential surface of the follower shaft and the inner wall of the second support body, and the fifth sealing ring is a lip sealing ring.

7. The dual-axis CNC turntable according to claim 5, characterized in that: A limit switch is arranged in the second support body, and the rotation of the follower shaft can trigger the limit switch to limit the rotation range of the swing shaft.

8. The dual-axis CNC turntable according to any one of claims 1 to 7, characterized in that: The inner cavities of the swing body, the first support body and the second support body are connected.

9. The dual-axis CNC turntable according to any one of claims 1 to 7, characterized in that: The first support body is also connected to a regulating valve, and the regulating valve can communicate with the external sealing gas source. The external sealing gas source can use the regulating valve to transport sealing gas to the inner cavities of the swing body, the first support body and the second support body.

10. An electrospark machine tool, comprising an oil tank, characterized in that: It also includes the dual-axis CNC turntable according to any one of claims 1 to 9, wherein the dual-axis CNC turntable is immersed in the machine tool fluid in the oil tank, and the inner cavity air pressure of the swing body, the first support body and the second support body is greater than the machine tool fluid pressure in the oil tank.

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