A numerical control turntable with temperature control and heat dissipation function

Abstract

The present invention discloses a CNC turntable with temperature control and heat dissipation functions, which relates to the technical field of CNC turntables, including a turntable box, the turntable box is fixedly connected to a gear box, the turntable box is fixedly connected to bearings symmetrically distributed along the turntable box, a worm is fixedly connected between the inner rings of the symmetrically distributed bearings, the worm is driven to rotate by a power assembly, a turbine disk is rotatably connected in the gearbox, the turbine disk is meshed with the worm, and the turbine disk is fixedly connected to a turntable; the gearbox is penetrated by two upper and lower connecting pipes, one of which is used for air intake, and the other is used for air outlet. The present invention uses multiple heat-conducting tubes to evenly and quickly transfer the high-temperature heat generated inside the CNC turntable during operation to the circulation tube for external circulation heat dissipation, thereby solving the problems of excessive temperature, complex internal structure, and uneven cooling of the CNC turntable.

Description

Technical Field

[0001] The invention relates to the technical field of numerical control turntables, and in particular to a numerical control turntable with temperature control and heat dissipation functions. Background Art

[0002] The CNC rotary table, also known as the CNC indexing head or CNC rotary table, is an important component on modern CNC machine tools. It allows the workpiece to be precisely positioned and rotated in multiple axes simultaneously to perform complex and polyhedral machining operations. The CNC rotary table is driven by a servo motor and combined with precision worm gears, gears or direct drive technology to achieve high-precision angular positioning and continuous rotation.

[0003] The patent with authorization announcement number CN116984907B provides a CNC turntable, including a base, a turntable cover, a transmission assembly and a driving member, the transmission assembly includes a meshing worm wheel and a worm, the worm wheel is in a circular ring shape, the worm wheel is coaxially arranged with the ring tube, the worm wheel includes a plurality of rollers, the rollers are cylindrical, and the turntable cover is connected to the worm wheel.

[0004] The high temperature generated when the CNC turntable is in operation may cause parts to expand, and may also accelerate the aging of lubricating oil, damaging components such as worm gears and bearings. The above patent reduces the friction of the meshing surfaces of the worm gear and the worm gear to solve the problem of severe heating of the meshing surfaces of the worm gear and the worm gear during operation, severe wear of the tooth surfaces, thereby generating transmission clearance and affecting the positioning accuracy of the turntable. Although it can reduce heat generation, it does not solve the problem of heat dissipation. Due to the complex internal space of the CNC turntable, it is easy to cause heat accumulation in some areas. Conventional guided heat dissipation is difficult to achieve targeted cooling of certain heating areas. At the same time, when the external temperature is low, it is difficult to control the heat distribution for insulation to make its data more stable. Based on this, the present invention proposes a CNC turntable with temperature control and heat dissipation function. Summary of the invention

[0005] In order to overcome the shortcomings of the numerical control turntable being difficult to control temperature and difficult to dissipate heat, the present invention provides a numerical control turntable with temperature control and heat dissipation functions, including a turntable box, the turntable box is fixedly connected to a gear box, the turntable box is fixedly connected to bearings symmetrically distributed along the turntable box, a worm is fixedly connected between the inner rings of the symmetrically distributed bearings, the worm is driven to rotate by a power assembly, a turbine disk is rotatably connected in the gearbox, the turbine disk is meshed with the worm, and the turbine disk is fixedly connected to a turntable; the gearbox is penetrated by two upper and lower connecting pipes, one of which is used for air intake, and the other is used for air outlet, a connecting pipe is connected between the two connecting pipes, and an annular circulation cylinder is arranged in the turntable box, and the circulation cylinder surrounds the worm and the turbine disk. In the middle, the upper and lower connecting pipes both pass through the turntable box and are connected to the circulation tube, and the circulation tube separates the two connecting pipes into upper and lower parts. After the gas enters the circulation tube through the connecting pipe on one side, it circulates along the inner cavity of the circulation tube, carrying the internal heat, and then is discharged through the connecting pipe on the other side. A fan for driving air flow is installed in the connecting pipe for air intake. The gear box is horizontally slidably connected to a baffle, which passes through the connecting pipe, and the baffle is slidably connected to the connecting pipe. The connecting pipe is located between the baffle and the fan. The side of the circulation tube close to the turbine disk is connected to a circumferentially spaced heat-conducting tube, and the side of the circulation tube close to the worm and the turbine disk is fixedly connected to a heat-conducting plate.

[0006] It is further explained that the power assembly includes a servo motor, the servo motor is fixedly connected to the gear box, the output shaft of the servo motor and the worm are both inserted into the gear box, and the output shaft of the servo motor and the worm are driven by a gear set.

[0007] Further description, there are two guide frames, which are rotatably connected to the side of the circulation tube close to the meshing of the worm and the turbine disk, and are used to slow down the flow speed of the airflow in the circulation tube at the meshing point of the worm and the turbine disk.

[0008] Further description, it also includes a piston cylinder, which is fixedly connected to a heat-conducting cylinder near the meshing point between the worm and the turbine disc, and a thermal expansion agent is stored in the piston cylinder. The piston cylinder is horizontally slidably connected to a piston rod, and the heat-conducting cylinder near one side of the piston cylinder is horizontally slidably connected to a first push frame, and the piston rod is slidably connected to the first push frame through an inclined groove, and the first push frame is used to push the guide frame to rotate.

[0009] It is further explained that the guide frame is composed of an adapter part, a short plate part and a long plate part, wherein the adapter part is rotatably connected to the circulation tube, the short plate part and the long plate part are fixedly connected to the adapter part, and are both located in the inner cavity of the circulation tube, the two side edges of the long plate part of the guide frame are in contact with the adjacent side walls of the circulation tube, and the short plate part of the guide frame is in contact with the first push frame.

[0010] Further description, it also includes a second push frame for pushing the guide frame to rotate, the second push frame is horizontally slidably connected to the side of the turntable box close to the piston rod, and the worm spline is connected to a sliding rod for pushing the second push frame to slide.

[0011] It is further explained that the second push frame is composed of a push plate and two wedge plates, wherein one wedge plate slides horizontally on the turntable box, the push plate is fixedly connected to the wedge plate sliding on the turntable box, and the other wedge plate is fixedly connected to the push plate.

[0012] It is further explained that the guide frame contacts the push plate of the second push frame, and the two are squeezed together, and the end of the sliding rod close to the second push frame contacts the two wedge plates of the second push frame, and the two wedge plates of the second push frame are squeezed together with the end of the sliding rod.

[0013] Further description, it also includes a clamping rod for clamping the second push rack, the clamping rod is slidably connected to the side wall of the circulation tube close to the second push rack along the up and down directions, the end surface of the piston rod close to the clamping rod is set as a wedge-shaped surface, and the piston rod releases the clamping rod from the second push rack through the wedge-shaped surface, and a spring is fixedly connected between the second push rack and the turntable box.

[0014] Further explanation: the clamping rod is composed of a straight horizontal rod and a vertical rod with a bent hook. The end face of the clamping rod close to the spring is set as a wedge-shaped surface. The wedge plate of the second push bracket sliding on the turntable box is squeezed and fitted with the wedge surface of the clamping rod, and the wedge surface of the piston rod is squeezed and fitted with the upper part of the vertical rod of the clamping rod.

[0015] Compared with the prior art, the present invention has the following advantages: the present invention uses multiple heat-conducting tubes to evenly and quickly transfer the high-temperature heat generated inside the CNC turntable during operation to the circulation tube for external circulation heat dissipation, thereby solving the problems of excessive temperature, complex internal structure and uneven cooling of the CNC turntable.

[0016] The present invention uses the heat conducting plate to carry out concentrated heat dissipation at the locations where the turbine disc and the worm mainly generate high heat, thereby further enhancing the heat dissipation speed.

[0017] The cooling system of the CNC turntable is independently set up and isolated from the working environment, so that the heat dissipation air will not directly blow to the mechanical parts in the working state, avoiding affecting the normal operation accuracy of the mechanical parts.

[0018] The present invention can retain the heat generated by the intensive operation of the numerical control turntable in the circulation tube when the external environment is low temperature, and circulate it internally to achieve the effect of uniform heat preservation, thereby preventing the external low temperature from affecting the mechanical properties of the numerical control turntable.

[0019] The present invention can intelligently adjust the opening size of the slow-speed zone according to the measured temperature, so as to ensure that the residence time of the airflow is extended in the area with higher temperature and accelerate the heat dissipation, and restore the residence time of the airflow when the temperature drops to avoid overcooling, thereby maintaining the temperature within a more ideal range and improving the accuracy and flexibility of temperature control.

[0020] The invention fully opens the slow speed port during the internal circulation, so as to avoid the problem that the temperature of the turbine worm is still high at low temperature, which causes the expansion of ethyl acetate and the smaller opening of the slow speed zone.

[0021] In the internal circulation stage of the present invention, if the insulation temperature reaches the upper limit, the internal circulation mode is automatically switched to the external circulation mode, thereby improving the safety performance of the numerical control turntable. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention.

[0023] Figure 2 It is a schematic diagram of the three-dimensional structure of the turntable box, gear box, turntable and other components separated from each other according to the present invention.

[0024] Figure 3 It is a three-dimensional structural schematic diagram of the gear box, servo motor, gear set and other components of the present invention.

[0025] Figure 4 It is a schematic diagram of the three-dimensional structure of the connecting tube and the flow cylinder of the present invention.

[0026] Figure 5 It is a schematic diagram of the three-dimensional structure of the connecting pipe, the baffle and the heat-conducting tube of the present invention.

[0027] Figure 6 It is a schematic diagram of the three-dimensional structure of the baffle of the present invention.

[0028] Figure 7 It is a schematic diagram of the three-dimensional structure of the circulation tube, the heat-conducting tube and the heat-conducting plate of the present invention.

[0029] Figure 8 It is a three-dimensional structural schematic diagram of the circulation cylinder, fan, baffle and other components of the present invention.

[0030] Fig. 9 It is a three-dimensional structural schematic diagram of the components such as the guide frame, piston cylinder and piston rod of the present invention.

[0031] Fig.10 It is a three-dimensional structural schematic diagram of the heat-conducting cylinder, the piston cylinder, the piston rod and the first push frame of the present invention.

[0032] Fig.11 It is a three-dimensional structural schematic diagram of the piston cylinder, piston rod, first push frame and other components of the present invention.

[0033] Fig.12 It is a three-dimensional structural schematic diagram of the worm, the sliding rod, the second push frame and other components of the present invention.

[0034] Fig.13 It is a three-dimensional structural schematic diagram of the second push frame, the clamping rod, the spring and other components of the present invention.

[0035] Fig.14 It is a three-dimensional structural schematic diagram of the piston rod, the second push frame, the clamping rod and other components of the present invention.

[0036] Explanation of the accompanying drawings: 1. turntable box, 2. gear box, 3. servo motor, 4. gear set, 5. worm, 6. bearing, 7. turbine disc, 8. turntable, 9. connecting pipe, 91. connecting pipe, 10. circulation tube, 11. fan, 12. baffle, 13. heat-conducting tube, 131. heat-conducting plate, 14. guide frame, 15. piston cylinder, 16. piston rod, 17. first push frame, 18. slide rod, 19. second push frame, 20. clamping rod, 21. spring. DETAILED DESCRIPTION

[0037] The present invention will be described in detail below in conjunction with the accompanying drawings.

[0038] Embodiment 1: A CNC turntable with temperature control and heat dissipation function, referring to the attached Figure 1 To Attachment Figure 8, including a turntable box 1, a gear box 2 is fixedly connected to the left side of the turntable box 1, a servo motor 3 is fixedly connected to the left side of the gear box 2, bearings 6 symmetrically distributed along the turntable box 1 are fixedly connected to the front side of the interior of the turntable box 1, a worm 5 is fixedly connected between the inner rings of the symmetrically distributed bearings 6, the output shaft of the servo motor 3 and the worm 5 are both inserted into the gear box 2, the output shaft of the servo motor 3 and the worm 5 are driven by a gear set 4, a turbine disk 7 is rotatably connected in the gear box 2, the turbine disk 7 is meshed with the worm 5, a turntable 8 is fixedly connected to the top of the turbine disk 7, two upper and lower connecting pipes 9 are horizontally penetrated through the rear of the gear box 2, the upper connecting pipe 9 is used for air intake, and the lower connecting pipe 9 is used for air outlet, and a connecting pipe 91 is connected between the two connecting pipes 9, and an annular circulation tube 10 is arranged in the turntable box 1, and the circulation tube 10 connects the worm 5 and the turbine disk 7 is surrounded in the middle, and the upper and lower connecting pipes 9 both pass through the turntable box 1 and are connected to the circulation tube 10, and the circulation tube 10 separates the two connecting pipes 9 into upper and lower parts. After the gas enters the circulation tube 10 through the upper connecting pipe 9, it circles counterclockwise along the inner cavity of the circulation tube 10, carrying the internal heat, and then is discharged through the lower connecting pipe 9. A fan 11 for driving air flow is installed in the upper connecting pipe 9. The gear box 2 is slidably connected with a baffle 12 in the front and rear directions. The baffle 12 passes through the connecting pipe 9, and the baffle 12 is slidably connected to the connecting pipe 9. The connecting pipe 91 is located between the fan 11 and the baffle 12. The side of the circulation tube 10 close to the turbine disk 7 is connected with a plurality of circumferentially spaced heat-conducting tubes 13 for uniform heat dissipation. The side of the circulation tube 10 close to the meshing of the worm 5 and the turbine disk 7 is fixedly connected with a heat-conducting plate 131 for centralized heat dissipation.

[0039] The specific working process of the numerical control turntable is: controlling the servo motor 3 to drive the gear set 4 to drive the worm 5 to rotate, thereby driving the turbine disk 7 to rotate, and then driving the turntable 8 to rotate.

[0040] When the high-intensity operation of the CNC turntable causes high temperature, it is necessary to dissipate heat inside it. Specifically, the baffle 12 is first pulled backward so that the upper and lower connecting pipes 9 are not blocked by the baffle 12. At this time, the fan 11 is started, so that natural wind enters the circulation tube 10 through the upper connecting pipe 9, flows counterclockwise along the circulation tube 10 for a circle, and then flows out of the connecting pipe 91 through the lower connecting pipe 9 to realize external air circulation. The natural wind airflow in the circulation tube 10 exchanges heat with the hot air flow generated by the working operation in the turntable box 1, so as to achieve the heat dissipation effect. At the same time, the heat conducting tube 13 can gather the diffuse hot air flow generated by the working operation in the turntable box 1 to the circulation tube 10, so that the natural wind in the circulation tube 10 can quickly take away the heat in the turntable box 1, and the heat conducting plate 131 can focus on the high-temperature heating area where the turbine disc 7 and the worm 5 are running, so that the heat dissipation of the turntable box 1 is targeted. After the heat dissipation is completed, the fan 11 is turned off.

[0041] When the external environment is too low, the metal material may shrink and become more brittle and hard, affecting the mechanical properties of the turntable, for example, reducing the lubrication effect of the bearing 6, resulting in increased wear and even causing component breakage. Therefore, in this case, it is necessary to use the working temperature for internal insulation. Specifically, the baffle 12 is pushed forward first so that the upper and lower connecting pipes 9 are blocked by the baffle 12. At this time, the heat generated during the operation of the CNC turntable is retained in the circulation tube 10. The fan 11 is started to allow the airflow to circulate between the connecting pipes 9 on the upper and lower sides through the connecting pipe 91, thereby realizing internal air circulation and achieving internal insulation effect.

[0042] In summary, the present invention uses multiple heat-conducting tubes 13 to evenly and quickly transfer the high-temperature heat generated inside the CNC turntable during operation to the circulation tube 10 for external circulation heat dissipation, thereby solving the problems of excessive temperature, complex internal structure, and uneven cooling of the CNC turntable.

[0043] The present invention uses the heat conducting plate 131 to carry out concentrated heat dissipation at the locations where the turbine disk 7 and the worm 5 mainly generate high heat, thereby further enhancing the heat dissipation speed.

[0044] The cooling system of the CNC turntable is independently set up and isolated from the working environment, so that the heat dissipation air will not directly blow to the mechanical parts in the working state, avoiding affecting the normal operation accuracy of the mechanical parts.

[0045] The present invention can retain the heat generated during the operation of the CNC turntable in the circulation tube 10 when the external environment is low temperature, and circulate it internally to achieve a uniform heat preservation effect, thereby preventing the external low temperature from affecting the mechanical properties of the CNC turntable.

[0046] Embodiment 2: Based on Embodiment 1, Fig. 9 To Attachment Fig.11, and also includes two guide frames 14, which are rotatably connected to the side of the circulation cylinder 10 close to the meshing of the worm 5 and the turbine disk 7. The guide frame 14 is composed of a transition portion, a short plate portion and a long plate portion, wherein the transition portion is rotatably connected to the circulation cylinder 10, the short plate portion and the long plate portion are both fixedly connected to the transition portion, and are both located in the inner cavity of the circulation cylinder 10, and both sides of the long plate portion of the guide frame 14 are in contact with the side wall of the inner cavity of the circulation cylinder 10, and the spacing between the ends of the two long plates of the guide frame 14 constitutes an opening of the deceleration zone, and by reducing the opening, the deceleration zone can be extended. The flow rate of the air flow in the slow-flow cylinder 10 at the meshing point of the worm 5 and the turbine disk 7 is slowed down. A piston cylinder 15 is fixedly connected to a heat-conducting cylinder 13 near the meshing point of the worm 5 and the turbine disk 7. Ethyl acetate is stored in the piston cylinder 15 as a thermal expansion agent. The piston cylinder 15 is slidably connected to a piston rod 16. The heat-conducting cylinder 13 near one side of the piston cylinder 15 is slidably connected to a first push frame 17. The piston rod 16 is slidably connected to the first push frame 17 through an inclined groove. The short plate portion of the guide frame 14 is in contact with the first push frame 17 to push the guide frame 14 to rotate.

[0047] Since the meshing area between the turbine disk 7 and the worm 5 is a high-temperature heating area, in the external circulation stage, in order to enable the gas in the circulation cylinder 10 to carry away more heat in this area, an air flow slow-down area is set in this area, and the opening size of the slow-down area is adjusted by temperature to achieve optimal cooling.

[0048] Specifically, the distance between the right ends of the two long plates of the guide frame 14 is set as the opening of the deceleration zone, and ethyl acetate is stored in the piston cylinder 15 as a temperature expansion agent. When the temperature rises, the ethyl acetate expands, and the internal pressure is greater than the external pressure, so that the piston rod 16 drives the first push frame 17 to slide to the side away from the guide frame 14. At this time, the guide frame 14 swings under the action of gravity, and the two long plates of the guide frame 14 approach each other, so that the distance between the right ends of the two long plates of the guide frame 14, that is, the opening size of the deceleration zone becomes smaller, thereby delaying the circulation speed of the airflow in the circulation tube 10 in the high-temperature heating zone, thereby extending the residence time of the airflow in the high-temperature heating zone, so that the gas in the circulation tube 10 can carry more heat from the high-temperature heating zone.

[0049] When the temperature drops, ethyl acetate contracts and the internal pressure is less than the external pressure, so that the piston rod 16 drives the first push frame 17 to slide toward the side close to the guide frame 14, thereby pushing the guide frame 14 to swing in the opposite direction. At this time, the two long plates of the guide frame 14 move away from each other, so that the distance between the right ends of the two long plates of the guide frame 14, that is, the opening size of the deceleration zone becomes larger, thereby accelerating the air flow velocity in the circulation cylinder 10 and shortening the residence time.

[0050] In summary, the present invention can intelligently adjust the opening size of the slow-speed zone according to the measured temperature, so as to ensure that the residence time of the airflow is extended in the higher temperature area and accelerate the heat dissipation, and restore the residence time of the airflow when the temperature drops to avoid overcooling, thereby maintaining the temperature within a more ideal range and improving the accuracy and flexibility of temperature control.

[0051] Embodiment 3: Based on Embodiment 2, Fig.12 , and also includes a second push frame 19 for pushing the guide frame 14 to rotate. The second push frame 19 is slidably connected to the side of the turntable box 1 close to the piston rod 16 along the front and rear directions. The second push frame 19 is composed of a push plate and two upper and lower wedge plates, wherein the lower wedge plate slides along the front and rear directions on the turntable box 1, and the push plate is fixedly connected to the right side of the lower wedge plate, and the upper wedge plate is fixedly connected to the front side of the push plate. The guide frame 14 contacts the push plate of the second push frame 19, and the two are squeezed together. The internal spline connection of the worm 5 is used to push the second push frame 19 to slide along the left and right directions. The right end of the slide rod 18 contacts the two wedge plates of the second push frame 19, and the two wedge plates of the second push frame 19 are squeezed together with the end of the slide rod 18.

[0052] When the baffle 12 is pushed forward, that is, when the internal circulation mode is switched, the front side of the baffle 12 squeezes the left end of the slide bar 18, causing the slide bar 18 to slide to the right, and the right end of the slide bar 18 squeezes the second push frame 19 to slide toward the side close to the guide frame 14, thereby squeezing the guide frame 14 to swing until the opening of the deceleration zone is opened to the maximum. In this way, the deceleration port is fully opened during the internal circulation to avoid the high temperature at the turbine worm gear 5 at low temperatures, which causes the ethyl acetate to expand, and then the opening of the deceleration zone becomes smaller.

[0053] When the baffle 12 is pulled backward, that is, when the external circulation mode is switched, the front side of the baffle 12 is separated from the left end of the slide bar 18, and the guide frame 14 swings in the opposite direction under the action of gravity, thereby pushing the second push frame 19 to slide and reset, and then squeezing the slide bar 18 to slide and reset.

[0054] Embodiment 4: Based on Embodiment 3, Fig.13 With attached Fig.14, also includes a clamping rod 20 for clamping the second push frame 19, the clamping rod 20 is slidably connected to the side wall of the circulation tube 10 near the second push frame 19 along the up and down directions, the clamping rod 20 is composed of a straight-line cross bar and a vertical rod with a hook, the straight-line cross bar can slide up and down along the circulation tube 10, the end surface of the vertical rod of the clamping rod 20 with the hook close to the spring 21 is set as a wedge-shaped surface, the wedge plate on the lower side of the second push frame 19 is squeezed and matched with the wedge-shaped surface of the clamping rod 20, the end surface of the piston rod 16 close to the clamping rod 20 is set as a wedge-shaped surface, the wedge-shaped surface of the piston rod 16 is squeezed and matched with the upper part of the vertical rod of the clamping rod 20, which is used to release the clamping rod 20 from the second push frame 19, and a spring 21 is fixedly connected between the second push frame 19 and the turntable box 1.

[0055] During the internal circulation stage, if the insulation temperature reaches the upper limit, for safety reasons, the internal circulation mode needs to be automatically switched to the external circulation mode. The specific operations are as follows:

[0056] When the right end of the slide bar 18 squeezes the second push frame 19 to slide toward the side close to the guide frame 14, the spring 21 is compressed, and the second push frame 19 squeezes the clamping rod 20 to slide upward. When the second push frame 19 slides over the clamping rod 20, the clamping rod 20 slides downward under the action of gravity to clamp the second push frame 19, so that the spring 21 is in a force storage state. When the insulation temperature reaches the upper limit, that is, when the ethyl acetate expands, the piston rod 16 slides to the side close to the clamping rod 20, thereby squeezing the clamping rod 20 to slide upward again to release the clamping position of the second push frame 19 by the clamping rod 20. At this time, the spring 21 resets and drives the second push frame 19 to slide and reset, thereby squeezing the slide bar 18 to slide and reset, and then squeezing the baffle 12 to slide backward, thereby automatically switching the internal circulation mode to the external circulation mode.

[0057] The above is only a specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art can easily think of changes or substitutions within the technical scope disclosed by the present invention, which should be included in the protection scope of the present invention. Therefore, the protection scope of the present invention should be based on the protection scope of the claims.

Claims

1. A numerically controlled turntable with temperature control and heat dissipation functions, comprising a turntable box (1), the turntable box (1) being fixedly connected to a gear box (2), the turntable box (1) being fixedly connected to bearings (6) symmetrically distributed along the turntable box (1), a worm (5) being fixedly connected between the inner rings of the symmetrically distributed bearings (6), the worm (5) being driven to rotate by a power assembly, a turbine disk (7) being rotatably connected inside the gear box (2), the turbine disk (7) being meshed with the worm (5), and the turbine disk (7) being fixedly connected to a turntable (8); Its characteristics are: The gear box (2) is penetrated by two upper and lower connecting pipes (9), one of which is used for air intake and the other is used for air outlet. A connecting pipe (91) is connected between the two connecting pipes (9). An annular circulation cylinder (10) is arranged in the turntable box (1). The circulation cylinder (10) surrounds the worm (5) and the turbine disc (7) in the middle. The upper and lower connecting pipes (9) both pass through the turntable box (1) and are connected to the circulation cylinder (10). The circulation cylinder (10) separates the two connecting pipes (9) into upper and lower parts. After the gas enters the circulation cylinder (10) through the connecting pipe (9) on one side, it is annularly arranged along the inner cavity of the circulation cylinder (10). The connecting tube (9) on the other side of the gear box (2) carries the internal heat through a circle, and then discharges it through the connecting tube (9) on the other side. A fan (11) for driving air flow is installed in the connecting tube (9) for air intake. The gear box (2) is horizontally slidably connected to a baffle (12). The baffle (12) passes through the connecting tube (9), and the baffle (12) and the connecting tube (9) are slidably connected. The connecting tube (91) is located between the baffle (12) and the fan (11). The side of the circulation tube (10) close to the turbine disk (7) is connected to a circumferentially spaced heat-conducting tube (13). The side of the circulation tube (10) close to the meshing of the worm (5) and the turbine disk (7) is fixedly connected to a heat-conducting plate (131).

2. The CNC turntable with temperature control and heat dissipation function according to claim 1 is characterized in that: The power assembly comprises a servo motor (3), the servo motor (3) is fixedly connected to the gear box (2), the output shaft of the servo motor (3) and the worm (5) are both inserted into the gear box (2), and the output shaft of the servo motor (3) and the worm (5) are driven by a gear set (4).

3. The CNC turntable with temperature control and heat dissipation function according to claim 2 is characterized in that: It also includes two guide frames (14), which are rotatably connected to a side of the circulation cylinder (10) close to the meshing of the worm (5) and the turbine disk (7), and the guide frames (14) are used to slow down the flow velocity of the airflow in the circulation cylinder (10) at the meshing point of the worm (5) and the turbine disk (7).

4. The CNC turntable with temperature control and heat dissipation function according to claim 3 is characterized in that: The invention also comprises a piston cylinder (15), wherein the piston cylinder (15) is fixedly connected to one of the heat-conducting cylinders (13) near the meshing position of the worm (5) and the turbine disk (7), wherein a heat expansion agent is stored in the piston cylinder (15), and the piston cylinder (15) is horizontally slidably connected to a piston rod (16), and the heat-conducting cylinder (13) near one side of the piston cylinder (15) is horizontally slidably connected to a first push frame (17), and the piston rod (16) is slidably connected to the first push frame (17) via an inclined groove, and the first push frame (17) is used to push the guide frame (14) to rotate.

5. The CNC turntable with temperature control and heat dissipation function according to claim 4 is characterized in that: The flow guide frame (14) is composed of a transition portion, a short plate portion and a long plate portion, wherein the transition portion is rotatably connected to the circulation tube (10), the short plate portion and the long plate portion are both fixedly connected to the transition portion and are both located in the inner cavity of the circulation tube (10), both side edges of the long plate portion of the flow guide frame (14) are in contact with adjacent side walls of the circulation tube (10), and the short plate portion of the flow guide frame (14) is in contact with the first push frame (17).

6. The CNC turntable with temperature control and heat dissipation function according to claim 5 is characterized in that: It also includes a second push frame (19) for pushing the guide frame (14) to rotate, the second push frame (19) is horizontally slidably connected to a side of the turntable box (1) close to the piston rod (16), and the worm gear (5) is spline-connected to a sliding rod (18) for pushing the second push frame (19) to slide.

7. The CNC turntable with temperature control and heat dissipation function according to claim 6 is characterized in that: The second push frame (19) is composed of a push plate and two wedge plates, wherein one wedge plate slides horizontally on the turntable box (1), the push plate is fixedly connected to the wedge plate sliding on the turntable box (1), and the other wedge plate is fixedly connected to the push plate.

8. The CNC turntable with temperature control and heat dissipation function according to claim 7 is characterized in that: The guide frame (14) contacts the push plate of the second push frame (19), and the two are pressed together; one end of the slide bar (18) close to the second push frame (19) contacts the two wedge plates of the second push frame (19), and the two wedge plates of the second push frame (19) are pressed together with the end of the slide bar (18).

9. The CNC turntable with temperature control and heat dissipation function according to claim 8, characterized in that: It also includes a clamping rod (20) for clamping the second push frame (19), the clamping rod (20) is slidably connected to the side wall of the circulation tube (10) close to the second push frame (19) in the up-down direction, the end surface of the piston rod (16) close to the clamping rod (20) is set as a wedge-shaped surface, the piston rod (16) releases the clamping position of the clamping rod (20) on the second push frame (19) through the wedge-shaped surface, and a spring (21) is fixedly connected between the second push frame (19) and the turntable box (1).

10. The CNC turntable with temperature control and heat dissipation function according to claim 9, characterized in that: The clamping rod (20) is composed of a straight-line horizontal rod and a vertical rod with a hook. The end surface of the clamping rod (20) close to the spring (21) is arranged as a wedge-shaped surface. The wedge-shaped plate of the second push frame (19) sliding on the turntable box (1) is pressed and fitted with the wedge-shaped surface of the clamping rod (20). The wedge-shaped surface of the piston rod (16) is pressed and fitted with the upper part of the vertical rod of the clamping rod (20).

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