An active cooling device for dual-drive feed axes of a machine tool and its usage method

Abstract

An active cooling device for a dual-drive feed axis of a machine tool and its usage method are disclosed. The device includes a cooling circuit, a central controller, and sub-controllers. An exhaust mechanism is installed on the outer wall of the cooling circuit. A circulating pump is installed on the outer wall of the cooling circuit. A cooling plate is installed on the top of the cooling circuit. A stabilizing mechanism is installed on the outer wall of the cooling plate. A pressure gauge, a flow meter, and a proportional valve are sequentially installed on the outer wall of the cooling circuit from bottom to top. An intelligent temperature-controlled oil tank is connected to the outer wall of the cooling circuit at the end furthest from the cooling plate. The exhaust mechanism includes a lower guide pipe fixedly connected to the outer wall of the cooling circuit. An exhaust pipe is fixedly connected to the outer wall of the lower guide pipe at the end furthest from the cooling circuit. This invention effectively solves the problems of inaccurate temperature control and cavitation caused by air bubbles in the coolant in existing dual-drive feed axis cooling devices.

Description

Technical Field

[0001] This invention relates to the field of machine tool precision maintenance and improvement technology, specifically to an active cooling device and method for dual-drive feed axes of a machine tool. Background Technology

[0002] As CNC machine tools develop towards higher speeds and higher precision, dual-drive feed axes are beginning to be used in high-end precision machine tools because they can effectively suppress vibrations generated by high-speed feeds. During the high-speed movement of dual-drive feed axes, the heat generated by components such as motors, lead screws and nuts, and bearings will cause uneven temperature fields in the dual-drive feed axes, resulting in thermal errors that seriously affect the machining accuracy of machine tools. Extensive practice and research have shown that machining and manufacturing errors caused by thermal deformation account for 40%-70% of the total machine tool error. Therefore, realizing a precise control device and method for thermal errors of dual-drive feed axes is of great significance for improving the machining accuracy of precision machine tools.

[0003] Existing technologies remove the heat accumulated by the heat-generating components by establishing a circulating cooling system. However, due to the complex structure of the dual-drive feed shaft, the cooling system still suffers from problems such as inaccurate temperature control and the presence of air bubbles in the coolant that can easily cause cavitation.

[0004] Therefore, there is a need for an active cooling device and method for dual-drive feed axes of machine tools to solve the problems mentioned in the background art. Summary of the Invention

[0005] The purpose of this invention is to provide an active cooling device and method for dual-drive feed axes of machine tools to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, the present invention provides the following technical solution:

[0007] An active cooling device for dual-drive feed axes of a machine tool includes a cooling circuit, a main control controller, and sub-control controllers. The outer wall of the cooling circuit is provided with an exhaust mechanism, a circulating pump is installed on the outer wall of the cooling circuit, a cooling plate is installed on the top of the cooling circuit, a stabilizing mechanism is provided on the outer wall of the cooling plate, and a pressure gauge, a flow meter, and a proportional valve are installed sequentially from bottom to top on the outer wall of the cooling circuit. An intelligent temperature-controlled oil tank is connected to the outer wall of the cooling circuit at the end away from the cooling plate.

[0008] The exhaust mechanism includes a lower guide pipe fixedly connected to the outer wall of the cooling circuit. An exhaust cylinder is fixedly connected to the outer wall of the lower guide pipe at the end away from the cooling circuit. A rotating shaft is rotatably connected inside the exhaust cylinder. A rotating impeller is fixedly connected to the outer wall of the rotating shaft at a position corresponding to the lower guide pipe. An exhaust membrane is fixedly connected to the inside of the exhaust cylinder on the right side of the rotating shaft. An ultrasonic transducer is installed inside the exhaust cylinder near the rotating impeller. A servo motor is installed on the outer wall of the exhaust cylinder at a position corresponding to the rotating shaft. An upper guide pipe is installed inside the exhaust cylinder near the ultrasonic transducer. A delivery pump is installed inside the upper guide pipe. A terminal block is installed on the outer wall of the exhaust cylinder.

[0009] As a preferred embodiment of the present invention, the stabilizing mechanism includes a mounting frame fixedly connected to the outer wall of the cooling plate, a semiconductor refrigeration chip is installed inside the mounting frame, a heat dissipation fin is fixedly connected to the outer wall of the semiconductor refrigeration chip on the side away from the cooling plate, a thermal pad is fixedly connected to the outer wall of the semiconductor refrigeration chip on the side away from the heat dissipation fin, and a thermocouple is fixedly connected inside the mounting frame at a position away from the semiconductor refrigeration chip.

[0010] As a preferred embodiment of the present invention, the cooling circuit and the cooling plate are provided in 8 sets. Since the coolant in each cooling circuit needs to be independently regulated in temperature, each cooling circuit is equipped with an independent intelligent temperature-controlled oil tank and a sub-controller. The cooling plate is U-shaped or W-shaped. The cooling plate is installed close to the outer surface of the corresponding component and fixed with bolts, or the cooling plate is in close contact with the outer surface of the heat source and thermal grease is applied to the contact surface to enhance the heat exchange capacity, and then it is fixed with bolts.

[0011] In a preferred embodiment of the present invention, the flow meter and the proportional valve are both connected to the main control controller to transmit and store the collected data in real time. The proportional valve responds to the valve opening command of the main control controller to realize the regulation of the coolant flow rate.

[0012] As a preferred embodiment of the present invention, the installation position of the cooling plate includes the positions of the front bearing assembly of the drive shaft, the rear bearing assembly of the drive shaft, the front bearing assembly of the driven shaft, the rear bearing assembly of the driven shaft, the hollow lead screw of the drive shaft, the hollow lead screw of the driven shaft, the drive shaft motor, the driven shaft motor, the drive shaft lead screw nut, and the driven shaft lead screw nut.

[0013] As a preferred embodiment of the present invention, the lower guide pipe, the exhaust pipe, and the upper guide pipe are all made of ABS plastic, the rotating shaft and the rotating impeller are both made of aluminum alloy, the inner wall of the exhaust pipe has a conical structure design, the exhaust membrane is made of a waterproof and breathable membrane, the servo motor is fixedly connected to the rotating shaft, and the upper guide pipe is fixedly connected to the cooling circuit, and the servo motor, the ultrasonic transducer, and the delivery pump are electrically connected to the terminals.

[0014] As a preferred embodiment of the present invention, the mounting frame is made of aluminum alloy, the heat dissipation fins extend through and beyond the mounting frame, and the thermal pad is made of thermally conductive silicone grease.

[0015] The method of using the above-mentioned machine tool dual-drive feed axis active cooling device includes the following steps:

[0016] S1, the coolant flows into the exhaust stack through the lower guide pipe in the cooling circuit. The servo motor is started, and the servo motor drives the rotating impeller to rotate through the rotating shaft. The rotating impeller drives the coolant in the exhaust stack to rotate. The rotating coolant makes a spiral acceleration motion in the conical inner wall of the exhaust stack. Since the mass of the coolant is greater than the mass of the bubbles, the bubbles gather towards the central axis under the action of centrifugal force. At the same time, the ultrasonic transducer will cause the coolant to generate high-frequency vibration. The high-frequency vibration of the coolant will destroy the structure of the bubble membrane, causing the gas to flow out of the coolant quickly. The gas that flows out is discharged through the exhaust membrane. The delivery pump sends the coolant with the bubbles removed back into the cooling circuit through the upper guide pipe.

[0017] S2, the coolant in the cooling circuit flows into the cooling plate. The thermocouple detects the surface temperature of the cooling plate and inputs the detection data into the sub-controller. The sub-controller calculates the difference between the detection data and the target temperature and compares the difference with a preset threshold. If the difference is greater than the preset threshold, it indicates that the cooling effect of the cooling plate cannot reach the target temperature. The sub-controller activates the semiconductor cooling chip, which further reduces the temperature of the cooling plate until it reaches the target temperature. The coolant in the cooling plate cools the target heat source. After cooling is completed, the coolant flows back into the intelligent temperature-controlled oil tank through the cooling circuit.

[0018] Compared with the prior art, the beneficial effects of the present invention are:

[0019] 1) In this invention, by setting an exhaust mechanism in the cooling circuit, a rotating impeller is used to drive the coolant in the exhaust pipe to rotate. The rotating coolant moves in a spiral acceleration motion in the conical inner wall of the exhaust pipe. Since the mass of the coolant is greater than the mass of the bubbles, the bubbles gather towards the central axis under the action of centrifugal force. At the same time, the ultrasonic transducer will cause the coolant to vibrate at a high frequency. The high-frequency vibration of the coolant will destroy the structure of the bubble membrane, causing the gas to flow out of the coolant quickly. The gas that flows out is discharged through the exhaust membrane. The delivery pump sends the coolant with the bubbles removed back into the cooling circuit through the upper guide pipe, thereby quickly removing the bubbles in the coolant and avoiding cavitation.

[0020] 2) The thermocouple is used to detect the surface temperature of the cooling plate and input the detection data into the host computer. The host computer adjusts the operation of the semiconductor cooler based on the difference between the calculated detection data and the target temperature. The semiconductor cooler will further reduce the temperature of the cooling plate so that the temperature of the cooling plate reaches the target temperature. This can keep the temperature of the cooling plate constant and solve the problems of inaccurate temperature control and cavitation caused by air bubbles in the coolant in the existing machine tool ball screw dual-drive feed axis cooling device. Attached Figure Description

[0021] Figure 1 This is a diagram of the device system composition;

[0022] Figure 2 This is a cross-sectional view of the exhaust mechanism;

[0023] Figure 3 This is a cross-sectional view of the cooling plate at the front bearing of the dual-drive feed shaft;

[0024] Figure 4 A cross-sectional view of the cooling plate at the lead screw nut of the dual-drive feed shaft;

[0025] Figure 5 This is a cross-sectional view of the cooling plate at the dual-drive feed axis motor.

[0026] Figure 6 This is a cross-sectional view of the cooling plate at the rear bearing of the dual-drive feed shaft;

[0027] Figure 7 Exploded view of the three-dimensional structure of the stabilizing mechanism.

[0028] In the diagram: 1. Cooling circuit; 2. Main controller; 3. Sub-controller; 4. Exhaust mechanism; 5. Circulating pump; 6. Cooling plate; 7. Stabilizing mechanism; 8. Pressure gauge; 9. Flow meter; 10. Proportional valve; 11. ; 12. Intelligent temperature-controlled oil tank; 401. Lower guide pipe; 402. Exhaust stack; 403. Rotating shaft; 404. Rotating impeller; 405. Exhaust membrane; 406. Ultrasonic transducer; 407. Servo motor; 408. Upper guide pipe; 409. Transfer pump; 510. Terminal block; 701. Mounting frame; 702. Semiconductor cooling chip; 703. Heat sink fins; 704. Thermal pad; 705. Thermocouple. Detailed Implementation

[0029] The technical solutions of the present invention will be clearly and completely described below with reference to the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the scope of protection of the present invention.

[0030] For examples, please refer to Figure 1-7 The present invention provides a technical solution:

[0031] An active cooling device for a dual-drive feed axis of a machine tool includes a cooling circuit 1, a main control controller 2, and a sub-control controller 3. An exhaust mechanism 4 is provided on the outer wall of the cooling circuit 1. A circulation pump 5 is installed on the outer wall of the cooling circuit 1. A cooling plate 6 is installed on the top of the cooling circuit 1. A stabilizing mechanism 7 is provided on the outer wall of the cooling plate 6. A pressure gauge 8, a flow meter 9, and a proportional valve 10 are installed sequentially from bottom to top on the outer wall of the cooling circuit 1. An intelligent temperature-controlled oil tank 11 is connected to the outer wall of the cooling circuit 1 at the end away from the cooling plate 6.

[0032] The exhaust mechanism 4 includes a lower guide pipe 401 fixedly connected to the outer wall of the cooling circuit 1. An exhaust pipe 402 is fixedly connected to the outer wall of the lower guide pipe 401 at the end away from the cooling circuit 1. A rotating shaft 403 is rotatably connected inside the exhaust pipe 402. A rotating impeller 404 is fixedly connected to the outer wall of the rotating shaft 403 at a corresponding position on the lower guide pipe 401. An exhaust membrane 405 is fixedly connected to the inside of the exhaust pipe 402 on the right side of the rotating shaft 403. An ultrasonic transducer 406 is installed inside the exhaust pipe 402 near the rotating impeller 404. A servo motor 407 is installed on the outer wall of the exhaust pipe 402 at a corresponding position on the rotating shaft 403. An upper guide pipe 408 is installed inside the exhaust pipe 402 near the ultrasonic transducer 406. A delivery pump 409 is installed inside the upper guide pipe 408. A terminal block 510 is installed on the outer wall of the exhaust pipe 402.

[0033] Furthermore, the stabilizing mechanism 7 includes a mounting frame 701 fixedly connected to the outer wall of the cooling plate 6. A thermoelectric cooler 702 is installed inside the mounting frame 701. A heat dissipation fin 703 is fixedly connected to the outer wall of the thermoelectric cooler 702 on the side away from the cooling plate 6. A thermal pad 704 is fixedly connected to the outer wall of the thermoelectric cooler 702 on the side away from the heat dissipation fin 703. A thermocouple 705 is fixedly connected inside the mounting frame 701 at a position away from the thermoelectric cooler 702.

[0034] Furthermore, both cooling circuit 1 and cooling plate 6 are provided with 8 sets. Since the coolant in each cooling circuit 1 needs to be independently regulated in temperature, each cooling circuit 1 is equipped with an independent intelligent temperature-controlled oil tank 11 and a sub-controller 3. The shape of the cooling plate 6 is U-shaped or W-shaped. The cooling plate 6 is installed close to the outer surface of the corresponding component and fixed with bolts, or the cooling plate 6 is in close contact with the outer surface of the heat source and thermal grease is applied to the contact surface to enhance the heat exchange capacity, and then it is fixed with bolts.

[0035] Furthermore, the flow meter 9 and the proportional valve 10 are both connected to the main controller 2 to transmit and store the collected data in real time. The proportional valve 10 responds to the valve opening command of the main controller 2 to realize the regulation of the coolant flow rate.

[0036] Furthermore, the installation positions of the cooling plate 6 include the positions of the front bearing assembly of the drive shaft, the rear bearing assembly of the drive shaft, the front bearing assembly of the driven shaft, the rear bearing assembly of the driven shaft, the hollow lead screw of the drive shaft, the hollow lead screw of the driven shaft, the drive shaft motor, the driven shaft motor, the drive shaft lead screw nut, and the driven shaft lead screw nut.

[0037] Furthermore, the lower guide pipe 401, exhaust pipe 402, and upper guide pipe 408 are all made of ABS plastic, the rotating shaft 403 and rotating impeller 404 are both made of aluminum alloy, the inner wall of the exhaust pipe 402 has a conical structure design, the exhaust membrane 405 is made of a waterproof and breathable membrane, the servo motor 407 is fixedly connected to the rotating shaft 403, the upper guide pipe 408 is fixedly connected to the cooling circuit 1, and the servo motor 407, ultrasonic transducer 406, and delivery pump 409 are electrically connected to the terminal block 510.

[0038] Furthermore, the mounting frame 701 is made of aluminum alloy, the heat dissipation fins 703 penetrate and extend outside the mounting frame 701, and the thermal pad 704 is made of thermal grease.

[0039] The above-mentioned active cooling device for dual-drive feed axes of machine tools includes the following steps when in use:

[0040] S1, the coolant flows into the exhaust pipe 402 through the lower guide pipe 401 in the cooling circuit 1. The servo motor 407 is started. The servo motor 407 drives the rotating impeller 404 to rotate through the rotating shaft 403. The rotating impeller 404 drives the coolant in the exhaust pipe 402 to rotate. The rotating coolant makes a spiral acceleration motion in the conical inner wall of the exhaust pipe 402. Since the mass of the coolant is greater than the mass of the bubbles, the bubbles gather towards the central axis under the action of centrifugal force. At the same time, the ultrasonic transducer 406 will cause the coolant to generate high-frequency vibration. The high-frequency vibration of the coolant will destroy the structure of the bubble membrane, causing the gas to flow out of the coolant quickly. The gas that flows out is discharged through the exhaust membrane 405. The delivery pump 409 sends the coolant with the bubbles removed back into the cooling circuit 1 through the upper guide pipe 408.

[0041] S2, the coolant in cooling circuit 1 flows into cooling plate 6. Thermocouple 705 detects the surface temperature of cooling plate 6 and inputs the detection data into sub-controller 3. Sub-controller 3 calculates the difference between the detection data and the target temperature and compares the difference with a preset threshold. If the difference is greater than the preset threshold, it indicates that the cooling effect of cooling plate 6 cannot reach the target temperature. Sub-controller 3 activates semiconductor cooling chip 702. Semiconductor cooling chip 702 further reduces the temperature of cooling plate 6 so that the temperature of cooling plate 6 reaches the target temperature. The coolant in cooling plate 6 cools the target heat source. After cooling is completed, the coolant flows back into intelligent temperature control oil tank 11 through cooling circuit 1.

[0042] In practice, the cooling plate 6 is installed at the corresponding positions of the front bearing assembly of the drive shaft, the rear bearing assembly of the drive shaft, the front bearing assembly of the driven shaft, the rear bearing assembly of the driven shaft, the hollow lead screw of the drive shaft, the hollow lead screw of the driven shaft, the drive shaft motor, the driven shaft motor, the drive shaft lead screw nut, and the driven shaft lead screw nut.

[0043] The target temperature control command is input to the main controller 2, which then sends it to the sub-controller 3. The sub-controller 3 automatically adjusts the temperature of the coolant in the intelligent temperature-controlled oil tank 11. The circulating pump 5 delivers coolant from the intelligent temperature-controlled oil tank 11 into the cooling circuit 1. The coolant flows into the exhaust pipe 402 through the lower guide pipe 401 in the cooling circuit 1. The sub-controller 3 starts the servo motor 407, which drives the rotating impeller 404 to rotate via the rotating shaft 403. 4. The coolant in the exhaust pipe 402 is rotated. The rotating coolant moves in a spiral acceleration in the conical inner wall of the exhaust pipe 402. Since the mass of the coolant is greater than the mass of the bubbles, the bubbles gather towards the central axis under the action of centrifugal force. At the same time, the ultrasonic transducer 406 will cause the coolant to vibrate at high frequency. The high frequency vibration of the coolant will destroy the structure of the bubble membrane, causing the gas to flow out of the coolant quickly. The gas that flows out is discharged through the exhaust membrane 405. The delivery pump 409 sends the coolant with the bubbles removed back into the cooling circuit 1 through the upper guide pipe 408.

[0044] Coolant from cooling circuit 1 flows into cooling plate 6. Thermocouple 705 detects the surface temperature of cooling plate 6 and inputs the detection data into sub-controller 3. Sub-controller 3 calculates the difference between the detection data and the target temperature and compares the difference with a preset threshold. If the difference is greater than the preset threshold, it indicates that the cooling effect of cooling plate 6 cannot reach the target temperature. Sub-controller 3 activates semiconductor cooling chip 702, which further reduces the temperature of cooling plate 6 to reach the target temperature. The coolant in cooling plate 6 cools the target heat source.

[0045] After cooling is complete, the coolant flows out of the cooling plate 6 and into the cooling circuit 1. The coolant then flows back into the intelligent temperature-controlled oil tank 11 through the cooling circuit 1. The intelligent temperature-controlled oil tank 11 regulates the temperature of the incoming coolant.

[0046] Repeating the above process, the coolant circulates along the cooling circuit 1, exhaust pipe 402, cooling plate 6, and intelligent temperature-controlled oil tank 11, continuously carrying away the heat in the cooling plate 6, thereby cooling the front bearing assembly of the drive shaft, the rear bearing assembly of the drive shaft, the front bearing assembly of the driven shaft, the rear bearing assembly of the driven shaft, the hollow lead screw of the drive shaft, the hollow lead screw of the driven shaft, the drive shaft motor, the driven shaft motor, the drive shaft lead screw nut, and the driven shaft lead screw nut.

[0047] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. An active cooling device for a dual-drive feed axis of a machine tool, comprising a cooling circuit (1), a main control controller (2), and a sub-control controller (3), characterized in that: The outer wall of the cooling circuit (1) is provided with an exhaust mechanism (4), the outer wall of the cooling circuit (1) is equipped with a circulation pump (5), the top of the cooling circuit (1) is equipped with a cooling plate (6), the outer wall of the cooling plate (6) is provided with a stabilizing mechanism (7), the outer wall of the cooling circuit (1) is equipped with a pressure gauge (8), a flow meter (9) and a proportional valve (10) from bottom to top, and the outer wall of the cooling circuit (1) is connected to an intelligent temperature-controlled oil tank (11) at the end away from the cooling plate (6); the exhaust mechanism (4) includes a solid A lower guide pipe (401) is fixedly connected to the outer wall of the cooling circuit (1). An exhaust pipe (402) is fixedly connected to the outer wall of the lower guide pipe (401) at the end away from the cooling circuit (1). A rotating shaft (403) is rotatably connected inside the exhaust pipe (402). A rotating impeller (404) is fixedly connected to the outer wall of the rotating shaft (403) at the corresponding position of the lower guide pipe (401). An exhaust film (405) is fixedly connected to the inside of the exhaust pipe (402) on the right side of the rotating shaft (403). An ultrasonic transducer (406) is installed inside the exhaust stack (402) near the rotating impeller (404). A servo motor (407) is installed on the outer wall of the exhaust stack (402) at a position corresponding to the rotating shaft (403). An upper guide pipe (408) is installed inside the exhaust stack (402) near the ultrasonic transducer (406). A delivery pump (409) is installed inside the upper guide pipe (408). A terminal block (510) is installed on the outer wall of the exhaust stack (402). The stabilizing mechanism (7) includes... A mounting frame (701) is fixedly connected to the outer wall of the cooling plate (6). A semiconductor refrigeration chip (702) is installed inside the mounting frame (701). A heat dissipation fin (703) is fixedly connected to the outer wall of the semiconductor refrigeration chip (702) on the side away from the cooling plate (6). A thermal pad (704) is fixedly connected to the outer wall of the semiconductor refrigeration chip (702) on the side away from the heat dissipation fin (703). A thermocouple (705) is fixedly connected inside the mounting frame (701) at a position away from the semiconductor refrigeration chip (702).

2. The active cooling device for a dual-drive feed axis of a machine tool according to claim 1, characterized in that: The cooling circuit (1) and the cooling plate (6) are each provided with 8 sets. Since the coolant of each cooling circuit (1) needs to be independently regulated, each cooling circuit (1) is equipped with an independent intelligent temperature control oil tank (11) and a sub-controller (3). The shape of the cooling plate (6) is U-shaped or W-shaped. The cooling plate (6) is installed close to the outer surface of the corresponding component and fixed with bolts, or the cooling plate (6) is close to the outer surface of the heat source and thermal grease is applied to the contact surface to enhance the heat exchange capacity, and then fixed with bolts.

3. The active cooling device for a dual-drive feed axis of a machine tool according to claim 1, characterized in that: The flow meter (9) and the proportional valve (10) are both connected to the main controller (2) to transmit and store the collected data in real time. The proportional valve (10) responds to the valve opening command of the main controller (2) to realize the regulation of the coolant flow rate.

4. The active cooling device for a dual-drive feed axis of a machine tool according to claim 1, characterized in that: The installation positions of the cooling plate (6) include the positions of the front bearing assembly of the drive shaft, the rear bearing assembly of the drive shaft, the front bearing assembly of the driven shaft, the rear bearing assembly of the driven shaft, the hollow lead screw of the drive shaft, the hollow lead screw of the driven shaft, the drive shaft motor, the driven shaft motor, the drive shaft lead screw nut, and the driven shaft lead screw nut.

5. The active cooling device for a dual-drive feed axis of a machine tool according to claim 1, characterized in that: The lower guide pipe (401), exhaust pipe (402) and upper guide pipe (408) are all made of ABS plastic. The rotating shaft (403) and rotating impeller (404) are both made of aluminum alloy. The inner wall of the exhaust pipe (402) is designed with a conical structure. The exhaust membrane (405) is made of a waterproof and breathable membrane. The servo motor (407) is fixedly connected to the rotating shaft (403), and the upper guide pipe (408) is fixedly connected to the cooling circuit (1). The servo motor (407), ultrasonic transducer (406) and delivery pump (409) are electrically connected to the terminal block (510).

6. The active cooling device for a dual-drive feed axis of a machine tool according to claim 1, characterized in that: The mounting frame (701) is made of aluminum alloy, the heat dissipation fins (703) extend through and beyond the mounting frame (701), and the thermal pad (704) is made of thermal grease.

7. A method of using the active cooling device for a dual-drive feed axis of a machine tool according to any one of claims 1-6, characterized in that, Includes the following steps: S1, the coolant flows into the exhaust stack (402) through the lower guide pipe (401) in the cooling circuit (1). The servo motor (407) is started. The servo motor (407) drives the rotating impeller (404) to rotate through the rotating shaft (403). The rotating impeller (404) drives the coolant in the exhaust stack (402) to rotate. The rotating coolant makes a spiral acceleration motion in the conical inner wall of the exhaust stack (402). Since the mass of the coolant is greater than the mass of the bubbles, the bubbles gather towards the central axis under the action of centrifugal force. At the same time, the ultrasonic transducer (406) will cause the coolant to generate high-frequency vibration. The high-frequency vibration of the coolant will destroy the structure of the bubble membrane, causing the gas to flow out of the coolant quickly. The gas that flows out is discharged through the exhaust membrane (405). The delivery pump (409) removes the bubbles through the upper guide pipe (408). The coolant is sent back into the cooling circuit (1); S2, the coolant in the cooling circuit (1) flows into the cooling plate (6), the thermocouple (705) detects the surface temperature of the cooling plate (6) and inputs the detection data into the sub-controller (3), the sub-controller (3) calculates the difference between the detection data and the target temperature and compares the difference with the preset threshold. If the difference is greater than the preset threshold, it indicates that the cooling effect of the cooling plate (6) cannot reach the target temperature. The sub-controller (3) starts the semiconductor cooling chip (702), the semiconductor cooling chip (702) will further reduce the temperature of the cooling plate (6) so that the temperature of the cooling plate (6) reaches the target temperature. The coolant in the cooling plate (6) cools the target heat source position. After the cooling is completed, the coolant flows back into the intelligent temperature control oil tank (11) through the cooling circuit (1).

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