Aluminum wheel hub annealing holding box

Abstract

The utility model discloses an aluminium wheel hub annealing heat preservation box, including the shell, the inside of shell is equipped with three vertical distribution's heat preservation frame, the inside of heat preservation frame all is equipped with inner shell, still includes annealing mechanism, annealing mechanism: it includes ceramic heating pipe, temperature sensor and flow guide component, ceramic heating pipe sets up in the left and right walls of inner shell respectively, the left and right walls of inner shell all are equipped with the temperature sensor of distribution, the wall body of inner shell all is equipped with flow guide component, still includes singlechip, the outside of shell is located in singlechip, and the input of singlechip is electrically connected with external power supply, this aluminium wheel hub annealing heat preservation box, in the aluminium wheel hub annealing heat preservation process, makes the circulating flow annealing air current in the device through the pipeline element and the power element, improves the annealing heating evenness of aluminium wheel hub, and further improves the annealing effect of aluminium wheel hub.

Description

Technical Field

[0001] This utility model relates to the field of wheel hub annealing technology, specifically to an aluminum wheel hub annealing and insulation box. Background Technology

[0002] Aluminum wheels typically refer to aluminum alloy automotive wheels, primarily made of aluminum alloy. They are lightweight, dissipate heat quickly, and are aesthetically pleasing, making them widely used in modern automobiles. During the production process, aluminum wheels undergo annealing and heat preservation treatment to improve their mechanical properties, eliminate residual stress, and optimize grain structure. In existing technology, patent CN 215725065 U discloses a box-type annealing furnace, including a furnace body, a base on the furnace body, a temperature control chamber on one side above the base, temperature control tubes evenly spaced on the inner wall of the temperature control chamber, a door at one end of the temperature control chamber, a connecting plate on the side of the door that connects to the temperature control chamber, a hydraulic drive cylinder between the connecting plate and the top of the temperature control chamber, and symmetrically arranged sliding rails on the other side above the base. A loading groove is located above the sliding rails, and a threaded rod is located inside an anti-detachment head at the bottom of the loading groove. A hydraulic drive motor is located at one end of the threaded rod. The pressure drive motor drives the loading tank to move in and out. This box-type annealing furnace can be used for annealing different parts, realizing automatic feeding and unloading, and achieving good annealing effect. When the device performs annealing and heat preservation operations on aluminum wheel hubs, the temperature control tube ensures that the device reaches the annealing temperature of the aluminum wheel hub. However, the position of the heating unit inside the device is fixed, resulting in different annealing temperatures for the aluminum wheel hubs located closer to the heating unit and those located farther from the heating unit, which in turn affects the annealing effect of the aluminum wheel hubs. Therefore, we propose an aluminum wheel hub annealing and heat preservation box. Utility Model Content

[0003] The technical problem to be solved by this utility model is to overcome the existing defects and provide an aluminum wheel hub annealing and heat preservation box. During the annealing and heat preservation process of aluminum wheel hubs, the device generates a circulating annealing airflow through pipe components and power components, thereby improving the uniformity of annealing heating of aluminum wheel hubs and thus improving the annealing effect of aluminum wheel hubs. This can effectively solve the problems in the background art.

[0004] To achieve the above objectives, this utility model provides the following technical solution: an aluminum wheel hub annealing and insulation box, including an outer shell, three vertically distributed insulation frames inside the outer shell, each insulation frame having an inner shell inside, and also including an annealing mechanism; Annealing mechanism: It includes ceramic heating tubes, temperature sensors and flow guiding components. The ceramic heating tubes are respectively set on the left and right walls of the inner shell. Temperature sensors are evenly distributed on both the left and right walls of the inner shell. Flow guiding components are set on the walls of the inner shell. During the annealing and heat preservation process of aluminum wheel hubs, the device generates a circulating annealing airflow in the device through pipe components and power components, which improves the uniformity of annealing heating of aluminum wheel hubs, thereby improving the annealing effect of aluminum wheel hubs.

[0005] Furthermore, it also includes a microcontroller, which is located outside the housing. The input terminal of the microcontroller is electrically connected to an external power supply, and the output terminal of the microcontroller is electrically connected to the input terminal of the ceramic heating tube. Temperature sensors are all bidirectionally electrically connected to the microcontroller, which facilitates the control of electrical components inside the device.

[0006] Furthermore, the bottom wall of the inner shell is provided with horizontally symmetrically distributed slide rails, and a pull-out plate is slidably connected between each slide rail. A door panel is provided on the front side of each pull-out plate. The interior of the outer shell is provided with three vertically distributed electro-hydraulic actuators. The input end of each electro-hydraulic actuator is electrically connected to the output end of the microcontroller. The telescopic end of each electro-hydraulic actuator is fixedly connected to the front side of the adjacent door panel through a connecting rod. The door panel and pull-out plate inside the aluminum hub annealing and insulation box can be automatically opened and closed.

[0007] Furthermore, the flow guiding assembly includes an outlet pipe, an upper connecting pipe, a lower connecting pipe, an inlet pipe, an inlet hole, and a circular shell. The outlet pipes are evenly arranged longitudinally on the left and right walls of the inner shell. An upper connecting pipe is provided between each horizontally adjacent outlet pipe. A lower connecting pipe is provided through the bottom wall of the inner shell. An inlet pipe is provided at the upper front end of each lower connecting pipe. An inlet hole is evenly distributed through the inner wall of each inlet pipe. A circular shell is provided between the upper connecting pipe and the vertically adjacent lower connecting pipe to provide pipeline supply for the annealing airflow in the aluminum hub annealing insulation box.

[0008] Furthermore, the annealing mechanism also includes a sleeve and a water pipe. The sleeve is respectively disposed on the lower side of the cylindrical shell, and the upper and lower ends of the inner wall of the sleeve are provided with water pipes. The water is used to cool the fan blades and prevent excessive heat from being conducted through the output shaft of a pair of servo motors.

[0009] Furthermore, the flow guiding assembly also includes a rotating shaft, fan blades, and a servo motor. The rotating shaft is rotatably connected to the middle of the bottom wall of the cylindrical shell via zirconia ceramic bearings. Each rotating shaft has a fan blade at its upper end and a servo motor at its lower side. The input end of each servo motor is electrically connected to the output end of the microcontroller. The lower end of each rotating shaft passes through an adjacent sleeve and is fixedly connected to the output shaft of the adjacent servo motor, thus providing power for the annealing airflow in the aluminum hub annealing insulation box.

[0010] Furthermore, the upper side of the pull-out plate is provided with evenly distributed sliding grooves, and each sliding groove is slidably connected to a limiting seat. Each sliding groove is provided with evenly distributed insertion holes, and each limiting seat is threaded with a locking bolt in the middle. The lower end of each locking bolt is inserted into an adjacent insertion hole. The limiting components of the aluminum hub in the aluminum hub annealing and insulation box are adjusted according to the diameter of the aluminum hub.

[0011] Compared with the prior art, the beneficial effects of this utility model are as follows: This aluminum wheel hub annealing and insulation box has the following advantages: During the annealing and heat preservation process of aluminum wheel hubs using an aluminum wheel hub annealing and heat preservation chamber, a circulating annealing airflow is generated within the device through piping and power components. The annealing airflow passes through the top left and right ends of the aluminum wheel hub at an inclined angle. By increasing the coverage area of ​​the annealing airflow over the aluminum wheel hub, the uniformity of annealing heating of the aluminum wheel hub is improved, thereby enhancing the annealing effect of the aluminum wheel hub. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the structure of this utility model; Figure 2 This is a schematic diagram of the internal structure of this utility model; Figure 3 This is a schematic diagram of the flow guiding component of this utility model; Figure 4 This is an enlarged structural diagram of point A in this utility model; Figure 5 This is an enlarged structural diagram of section B of the present invention.

[0013] In the diagram: 1 Outer shell, 2 Microcontroller, 3 Insulation frame, 4 Inner shell, 5 Slide rail, 6 Pull-out plate, 7 Annealing mechanism, 71 Ceramic heating tube, 72 Temperature sensor, 73 Flow guide assembly, 731 Air outlet pipe, 732 Upper connecting pipe, 733 Lower connecting pipe, 734 Air inlet pipe, 735 Air inlet hole, 736 Round shell, 737 Rotating shaft one, 738 Fan blade, 739 Servo motor, 74 Sleeve, 75 Water pipe, 8 Door panel, 9 Electro-hydraulic push rod, 10 Connecting rod, 11 Slide groove, 12 Limit seat, 13 Insertion hole, 14 Locking bolt. Detailed Implementation

[0014] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0015] Please see Figure 1-5This embodiment provides a technical solution: an aluminum wheel hub annealing insulation box, including an outer shell 1, with three vertically distributed insulation frames 3 inside the outer shell 1, and an inner shell 4 inside each insulation frame 3. It also includes a microcontroller 2 located outside the outer shell 1, with its input terminal electrically connected to an external power supply. The bottom wall of each inner shell 4 is provided with horizontally symmetrically distributed slide rails 5, with a pull-out plate 6 slidably connected between each slide rail 5. Each pull-out plate 6 has a door panel 8 on its front side. Inside the outer shell 1 are three vertically distributed electro-hydraulic actuators 9, with their input terminals electrically connected to the output terminal of the microcontroller 2. The telescopic ends of the electro-hydraulic actuators 9 are fixedly connected to the front side of the adjacent door panel 8 via connecting rods 10. The upper side of the pull-out plate 6 has evenly distributed... The sliding groove 11 of the cloth has a limiting seat 12 slidably connected inside. The sliding groove 11 has evenly distributed insertion holes 13. A locking bolt 14 is threadedly connected to the middle of each limiting seat 12, and the lower end of each locking bolt 14 is inserted into an adjacent insertion hole 13. When using the device to anneal and heat-insulate the aluminum hub, the water pipe 75 at the upper end of the sleeve 74 is connected to the external water inlet pipe, and the water pipe 75 at the lower end of the sleeve 74 is connected to the external water outlet pipe. Then, according to the diameter of the aluminum hub, the limiting seats 12 are moved so that the four limiting seats 12 in the same plane move closer or further away from the center of the device along the corresponding sliding groove 11, thereby adjusting the limiting wheel diameter of the aluminum hub by the four limiting seats 12 in the same horizontal plane. Then, the limiting seats are rotated... The locking bolt 14 on the 12 moves vertically downwards through a threaded connection with the limiting seat 12, allowing the lower end of the locking bolt 14 to engage with the vertically adjacent insertion hole 13. This limits the sliding of the limiting seat 12 along the slide groove 11. Then, the aluminum hub is placed horizontally between the four limiting seats 12. Subsequently, the microcontroller 2 activates the electro-hydraulic actuator 9, causing its telescopic end to move longitudinally backwards via the connecting rod 10, driving the corresponding door panel 8. The door panel 8 then drives the corresponding pull-out plate 6 to slide longitudinally backwards synchronously along the slide rail 5 (the sliding connection between the pull-out plate 6 and the slide rail 5 bears the radial pressure applied by the connecting rod 10 to the telescopic end of the electro-hydraulic actuator 9, preventing damage to the telescopic end of the electro-hydraulic actuator 9 due to radial pressure). The door panel 8 drives the aluminum hub on the pull-out plate 6 to automatically enter the inner shell 4 of the device. During this process, the microcontroller 2 controls the longitudinal movement distance of the door panel 8 driven by the extension end of the electro-hydraulic push rod 9 based on the movement distance of the extension end per unit time and its own timing unit. The frame of the insulation frame 3 is filled with ceramic fiber blanket. The ceramic fiber blanket is formed by interwoven ceramic fibers to form a porous structure, which hinders heat transfer by extending the heat conduction path. The ceramic fiber blanket can withstand temperatures up to 1350℃, and 400℃ is its commonly used working temperature range. It effectively blocks heat loss, thereby reducing the rate at which heat overflows along the inner shell 4 during the annealing and insulation of the aluminum hub. At the same time, the interior of the door panel 8 is also filled with ceramic fiber blanket and includes an annealing mechanism 7. Annealing mechanism 7: It includes ceramic heating tubes 71, temperature sensors 72, and flow guiding components 73. The ceramic heating tubes 71 are respectively disposed on the left and right walls of the inner shell 4. Temperature sensors 72 are evenly distributed on both the left and right walls of the inner shell 4. Flow guiding components 73 are disposed on the walls of the inner shell 4. The output terminals of the microcontroller 2 are electrically connected to the input terminals of the ceramic heating tubes 71. The temperature sensors 72 are all bidirectionally electrically connected to the microcontroller 2. The flow guiding components 73 include an exhaust pipe 731, an upper connecting pipe 732, a lower connecting pipe 733, an intake pipe 734, an intake hole 735, and a circular shell 736. The exhaust pipes 731 are evenly disposed longitudinally on the left and right walls of the inner shell 4. An upper connecting pipe 732 is disposed between each horizontally adjacent exhaust pipe 731. The bottom wall of the inner shell 4 is perforated by a lower connecting pipe 736. The connecting pipe 733 and the upper front end of the lower connecting pipe 733 are each provided with an air inlet pipe 734. The inner wall of the air inlet pipe 734 is provided with evenly distributed air inlet holes 735. A circular shell 736 is provided between the upper connecting pipe 732 and the vertically adjacent lower connecting pipe 733. The annealing mechanism 7 also includes a sleeve 74 and a water pipe 75. The sleeve 74 is respectively provided on the lower side of the circular shell 736. The upper and lower ends of the inner wall of the sleeve 74 are provided with water pipes 75. The flow guiding assembly 73 also includes a rotating shaft 737, a fan blade 738 and a servo motor 739. The rotating shaft 737 is rotatably connected to the middle of the bottom wall of the circular shell 736 through a zirconia ceramic bearing. The upper end of the rotating shaft 737 is provided with a fan blade 738. The lower side of the sleeve 74 is provided with a servo motor 739. The input end of the servo motor 739 is provided with a fan blade 738. Electrically connected to the output of the microcontroller 2, the lower end of the rotating shaft 737 passes through the adjacent sleeve 74 and is fixedly connected to the output shaft of the adjacent servo motor 739. During the annealing and heat preservation process of the aluminum wheel hub, the microcontroller 2 activates the ceramic heating tube 71 to heat the interior of the inner shell 4. Simultaneously, the microcontroller 2 activates the temperature sensor 72. The temperature sensor 72 detects the annealing environment temperature of the aluminum wheel hub inside the inner shell 4 by measuring the change in resistance value of the thermistor as the temperature changes, and transmits the detection result to the microcontroller 2 as an electrical signal. Multiple sets of temperature sensors 72 are provided inside the inner shell 4, distributed at different positions on the left and right walls of the inner shell 4. The use of multiple sets of temperature sensors 72 improves the accuracy of detecting the annealing environment temperature of the aluminum wheel hub. The microcontroller 2 adjusts the output power of the ceramic heating tube 71 based on the temperature measurement results, thereby controlling the annealing temperature of the aluminum hub. Simultaneously, the microcontroller 2 activates the servo motor 739, causing its output shaft to drive the corresponding fan blade 738 through the rotating shaft 737 (both the rotating shaft 737 and fan blade 738 are made of silicon-iron alloy, suitable for high-temperature environments). The rotation of the fan blade 738 generates negative pressure, causing hot air from the bottom of the inner shell 4 to enter the intake pipe 734 through the air inlet 735, and then be blown out at an angle from the corresponding outlet pipe 731 through the lower connecting pipe 733 and the upper connecting pipe 732. This causes the hot air to be blown obliquely from the upper end of the inner shell 4 towards the aluminum hub, and then enters the air inlet 735 from below the aluminum hub, circulating through the hot air.This device accelerates the annealing and heating rate of the inner shell 4, and ensures uniform heating of the aluminum hub during the subsequent annealing and heat preservation process. During the annealing and heat preservation process (annealing temperature: 290℃±10℃), cooling water enters through the water pipe 75 at the upper end of the sleeve 74 via the external inlet pipe, and exits through the water pipe 75 at the lower end of the sleeve 74 to the external outlet pipe. The water inside the sleeve 74 comes into thermal contact with the rotating shaft 737, thus preventing the fan blades 738 from conducting excessive heat to the output shaft of the servo motor 739 through the rotating shaft 737. The zirconia ceramic bearing has a temperature resistance of approximately 1500℃. During the annealing and heat preservation process of the aluminum hub, the device generates a circulating annealing airflow through the pipe components and power components, improving the uniformity of the annealing heating of the aluminum hub and thus improving the annealing effect.

[0016] The working principle of the aluminum hub annealing and heat preservation box provided by this utility model is as follows: When using the device to anneal and heat preserve the aluminum hub, the water pipe 75 at the upper end of the sleeve 74 is connected to the external water inlet pipe, and the water pipe 75 at the lower end of the sleeve 74 is connected to the external water outlet pipe. Then, according to the diameter of the aluminum hub, the limiting seat 12 is moved so that the four limiting seats 12 in the same plane move closer or further away from the center of the device along the corresponding sliding groove 11, thereby adjusting the limiting wheel diameter of the aluminum hub by the four limiting seats 12 in the same horizontal plane. Then, the locking bolt 14 on the limiting seat 12 is rotated. The locking bolt 14 moves vertically downward through the threaded connection with the limiting seat 12, so that the lower end of the locking bolt 14 is inserted into the vertically adjacent insertion hole 13, thereby limiting the wheel diameter. Seat 12 slides along the slide groove 11 for limiting, then the aluminum hub is placed flat between the four limiting seats 12. Then, the microcontroller 2 activates the electro-hydraulic actuator 9, causing its telescopic end to move longitudinally backward along the connecting rod 10, driving the corresponding door panel 8. The door panel 8 drives the corresponding pull-out plate 6 to slide longitudinally backward along the slide rail 5 (the sliding connection between the pull-out plate 6 and the slide rail 5 bears the radial pressure applied by the connecting rod 10 to the telescopic end of the electro-hydraulic actuator 9, preventing damage to the telescopic end of the electro-hydraulic actuator 9 due to radial pressure). This causes the aluminum hub on the pull-out plate 6 to automatically enter the inner shell 4 of the device. During this process, the microcontroller 2, based on the travel distance of the telescopic end of the electro-hydraulic actuator 9 per unit time and its own timing unit, calculates the travel distance. The longitudinal movement distance of the door panel 8 driven by the telescopic end of the electro-hydraulic actuator 9 is controlled. The frame of the insulation frame 3 is filled with ceramic fiber blankets. The ceramic fiber blankets are made of interwoven ceramic fibers to form a porous structure, which hinders heat transfer by extending the heat conduction path. The ceramic fiber blankets can withstand temperatures up to 1350℃, with 400℃ being their commonly used operating temperature range. This effectively blocks heat loss, thereby reducing the rate at which heat overflows along the inner shell 4 during the annealing and insulation of the aluminum wheel hub. At the same time, the interior of the door panel 8 is also filled with ceramic fiber blankets. When the aluminum wheel hub is annealed and insulated, the microcontroller 2 activates the ceramic heating tube 71 to heat the interior of the inner shell 4. Simultaneously, the microcontroller 2 activates the temperature sensor 72. The temperature sensor 72 operates by controlling the change in resistance value generated by the thermistor as the temperature changes. The annealing process involves multiple temperature sensors 72 located on the left and right walls of the inner shell 4 to detect the ambient temperature of the aluminum wheel hub during annealing. These sensors improve the accuracy of temperature detection. The microcontroller 2 adjusts the output power of the ceramic heating element 71 based on the temperature measurement results, thereby controlling the annealing temperature of the aluminum wheel hub. Simultaneously, the microcontroller 2 activates the servo motor 739, causing its output shaft to drive the corresponding fan blade 738 through the rotating shaft 737 (both the rotating shaft 737 and the fan blade 738 are made of silicon-iron alloy, suitable for high-temperature environments). The rotation of the fan blade 738 generates negative pressure.This allows hot air from the bottom of the inner shell 4 to enter the intake pipe 734 through the intake hole 735, and then be blown out at an angle from the corresponding exhaust pipe 731 through the lower connecting pipe 733 and the upper connecting pipe 732. This causes the hot air to be blown obliquely from the upper end of the inner shell 4 towards the aluminum hub, and then enters the intake hole 735 from below the aluminum hub. This hot air circulation accelerates the annealing and heating rate of the inner shell 4, and ensures that the aluminum hub is heated evenly during the subsequent annealing and heat preservation process. During the annealing and heat preservation process of the aluminum hub, cooling water enters through the water pipe 75 at the upper end of the sleeve 74 along the external water inlet pipe, and is discharged to the external water outlet pipe through the water pipe 75 at the lower end of the sleeve 74. The water in the sleeve 74 is in thermal contact with the rotating shaft 737, thus preventing the fan blades 738 from conducting excessive heat to the output shaft of the servo motor 739 through the rotating shaft 737. The zirconia ceramic bearing has a temperature resistance of approximately 1500℃.

[0017] It is worth noting that the microcontroller 2 disclosed in the above embodiments can be an STC89C52, the ceramic heating tube 71 can be an MCH ceramic heating element, the temperature sensor 72 can be a DG36-JMT-36C, the servo motor 739 can be an MHMF042L1U2M, and the electro-hydraulic actuator 9 can be a DYTZB1000-500. The microcontroller 2 controls the operation of the ceramic heating tube 71, the temperature sensor 72, the servo motor 739, and the electro-hydraulic actuator 9 using methods commonly used in the prior art.

[0018] The above description is merely an embodiment of this utility model and does not limit the patent scope of this utility model. Any equivalent structural or procedural transformations made based on the content of this utility model specification and drawings, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of this utility model.

Claims

1. An aluminum wheel hub annealing insulation box, comprising an outer shell (1), wherein the outer shell (1) has three vertically distributed insulation frames (3) inside, and each insulation frame (3) has an inner shell (4) inside, characterized in that: It also includes the annealing mechanism (7); Annealing mechanism (7): It includes ceramic heating tube (71), temperature sensor (72) and flow guiding component (73). The ceramic heating tube (71) is respectively disposed on the left and right walls of the inner shell (4). The left and right walls of the inner shell (4) are provided with evenly distributed temperature sensors (72), and the walls of the inner shell (4) are provided with flow guiding components (73).

2. The aluminum wheel hub annealing and insulation box according to claim 1, characterized in that: It also includes a microcontroller (2), which is located outside the housing (1). The input terminal of the microcontroller (2) is electrically connected to an external power supply, and the output terminal of the microcontroller (2) is electrically connected to the input terminal of the ceramic heating tube (71). The temperature sensor (72) is bidirectionally electrically connected to the microcontroller (2).

3. The aluminum wheel hub annealing and insulation box according to claim 2, characterized in that: The bottom wall of the inner shell (4) is provided with horizontally symmetrically distributed slide rails (5), and a pull plate (6) is slidably connected between each slide rail (5). A door panel (8) is provided on the front side of each pull plate (6). The interior of the outer shell (1) is provided with three vertically distributed electro-hydraulic actuators (9). The input end of each electro-hydraulic actuator (9) is electrically connected to the output end of the microcontroller (2). The telescopic end of each electro-hydraulic actuator (9) is fixedly connected to the front side of the adjacent door panel (8) through a connecting rod (10).

4. The aluminum wheel hub annealing and insulation box according to claim 2, characterized in that: The flow guiding assembly (73) includes an air outlet pipe (731), an upper connecting pipe (732), a lower connecting pipe (733), an air inlet pipe (734), an air inlet hole (735), and a circular shell (736). The air outlet pipes (731) are evenly arranged longitudinally on the left and right walls of the inner shell (4). An upper connecting pipe (732) is provided between each horizontally adjacent air outlet pipe (731). The bottom wall of the inner shell (4) is provided with a lower connecting pipe (733). An air inlet pipe (734) is provided at the upper front side of each lower connecting pipe (733). An evenly distributed air inlet hole (735) is provided through the inner wall of each air inlet pipe (734). A circular shell (736) is provided between the upper connecting pipe (732) and the vertically adjacent lower connecting pipe (733).

5. The aluminum wheel hub annealing and insulation box according to claim 4, characterized in that: The annealing mechanism (7) also includes a sleeve (74) and a water pipe (75). The sleeve (74) is respectively disposed on the lower side of the round shell (736), and the water pipe (75) is provided through the upper and lower ends of the inner wall of the sleeve (74).

6. The aluminum wheel hub annealing and insulation box according to claim 5, characterized in that: The flow guiding assembly (73) also includes a rotating shaft (737), a fan blade (738), and a servo motor (739). The rotating shaft (737) is rotatably connected to the middle of the bottom wall of the round shell (736) through a zirconia ceramic bearing. The upper end of the rotating shaft (737) is provided with a fan blade (738), and the lower side of the sleeve (74) is provided with a servo motor (739). The input end of the servo motor (739) is electrically connected to the output end of the microcontroller (2). The lower end of the rotating shaft (737) passes through the adjacent sleeve (74) and is fixedly connected to the output shaft of the adjacent servo motor (739).

7. The aluminum wheel hub annealing and insulation box according to claim 3, characterized in that: The upper side of the pull plate (6) is provided with evenly distributed sliding grooves (11), and the interior of each sliding groove (11) is slidably connected to a limit seat (12). The interior of each sliding groove (11) is provided with evenly distributed insertion holes (13). The middle part of each limit seat (12) is threaded with a locking bolt (14), and the lower end of each locking bolt (14) is inserted into the adjacent insertion hole (13).

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