Permanent magnet induction heating device and heating method

Abstract

The invention relates to the technical field of hub machining, in particular to a permanent magnet induction heating device and method.The heating device comprises a machine table, a hub clamping jaw assembly and a flexible magnetic disk, and the hub clamping jaw assembly is arranged on the machine table and comprises a plurality of self-adaptive chucks evenly distributed in the circumferential direction; the self-adaptive chuck moves in the radial direction to adjust the diameter of a circle where the inner side of the self-adaptive chuck is located so as to clamp hubs with different outer circle diameters, and the hub clamping jaw assembly can rotate around the axis of the hub clamping jaw assembly to drive the hubs to rotate. The flexible magnetic disk is arranged on the machine table and is coaxial with the hub clamping jaw assembly, the flexible magnetic disk comprises a plurality of magnetic steel assemblies which are evenly distributed in the circumferential direction, and the magnetic steel assemblies move in the radial direction to adjust the diameter of the circle where the outer sides of the magnetic steel assemblies are located so as to adapt to hubs with different inner circle diameters. The mode of hub rotation and flexible magnetic disk fixation is adopted, the problems of eccentricity and vibration caused by rotation of a magnetic disk in traditional equipment are structurally eliminated, it is ensured that air gaps between the magnetic steel assembly and the inner wall of the hub are uniform, and heating of hubs with different outer diameters and inner diameters can be adapted.

Description

Technical Field

[0001] This application relates to the field of wheel hub processing technology, and in particular to a permanent magnet induction heating device and heating method. Background Technology

[0002] As a critical load-bearing component of automobiles, the quality of automotive wheels directly affects driving safety and handling performance. In the wheel manufacturing process, heat treatment is a core step in improving wheel strength. Traditional processes often use furnaces to heat the entire wheel, but furnaces have low heating efficiency and high energy consumption, and cannot be well matched and integrated with subsequent processes such as spinning to meet wheel quality requirements. Recently, to improve heating efficiency and reduce energy consumption, and to adapt to different wheel sizes and subsequent spinning processes, induction heating equipment, including permanent magnet induction heating equipment, has begun to be used.

[0003] Existing induction heating equipment mostly uses a fixed-size disk structure, which can only be adapted to a single specification of wheel hub. For wheel hubs with different outer and inner diameters, the corresponding disk needs to be replaced, which not only increases material costs and labor replacement time, but also easily affects heating accuracy due to replacement errors. Traditional equipment often uses a heating mode with rotating disks and fixed hubs, which requires centering the hub first and extending the heating cycle. Furthermore, the rotating disk is prone to eccentricity and vibration, resulting in uneven air gaps between the magnets and the inner wall of the hub, which in turn causes large temperature deviations around the hub, failing to meet the requirements of high-precision spinning processes. In addition, the magnetic field of the rotating disk is prone to diffuse into the surrounding air, resulting in serious energy loss and high heating energy consumption. Summary of the Invention

[0004] This application provides a permanent magnet induction heating device and heating method to solve the problems of existing permanent magnet induction heating devices being incompatible with multiple wheel hub specifications, having low heating accuracy, and high energy consumption.

[0005] On one hand, this application provides a permanent magnet induction heating device, comprising: Machine tool; The wheel hub chuck assembly is set on the machine base and includes multiple adaptive chucks evenly distributed around the circumference. The adaptive chucks adjust the diameter of their inner circle by moving radially to clamp wheel hubs with different outer diameters. The wheel hub chuck assembly can rotate around its own axis to drive the wheel hub to rotate. The flexible disk is mounted on the machine base and coaxially arranged with the hub claw assembly. The flexible disk includes multiple circumferentially distributed magnet assemblies. The magnet assemblies can adjust the diameter of their outer circle by moving radially to fit hubs with different inner circle diameters.

[0006] In one possible design, the machine tool is equipped with a first driving component and a second driving component. The output end of the first driving component is connected to the hub claw assembly for driving the hub claw assembly to rotate around its own axis and thus drive the hub to rotate. The output end of the second driving component is connected to the flexible disk for driving the flexible disk to move along the height direction of the machine tool and thus adjusting the heating depth of the flexible disk.

[0007] In one possible design, the wheel hub chuck assembly includes: The base, the center of which is connected to the first driving component for transmission; Adjustable guide rails, including multiple ones, are evenly distributed on the base in the circumferential direction, and each adjustable guide rail extends radially along the base. Clamping arms, including multiple ones, are respectively set on corresponding adjustment guide rails and can slide along the adjustment guide rails. Adaptive chucks are installed on the inner side of the clamping arms and are hinged to the clamping arms. An adjustment drive mechanism, located in the middle of the base, is used to drive the clamping arm to slide along the adjustment guide rail.

[0008] In one possible design, the adjustment drive mechanism includes: Adjusting screw, the adjusting screw is set along the length of the adjusting guide rail; An adjusting nut is fitted onto the outer end of the adjusting screw and connected to the clamping arm. The third driving component is connected to the inner end of the adjusting screw and is used to drive the adjusting screw to rotate, thereby causing the adjusting nut and clamping arm to move radially.

[0009] In one possible design, a pressure sensor is provided inside the adaptive chuck; and / or, a fitting pad is provided on the inside of the adaptive chuck.

[0010] In one possible design, the flexible disk includes: Mounting base; End caps are located below the mounting base; The spindle has one end rotatably connected to the mounting base and the other end rotatably connected to the end cover. Large bevel gears are fitted on the spindle. The gear bracket is located between the mounting base and the end cover. The center of the gear bracket has a clearance hole for the spindle to pass through, and the gear bracket has multiple radial mounting holes evenly distributed around the circumference. There are multiple axles, each set in a corresponding mounting hole. The inner end of the axle is fitted with a small bevel tooth that meshes with a large bevel tooth. The outer end of the axle has a threaded section that is threadedly connected to the magnet assembly. The main shaft rotates to drive the axle to rotate, which in turn drives the magnet assembly to move radially.

[0011] In one possible design, the flexible disk also includes: The flange nut has a threaded connection between its center and the threaded section, and its flange face is connected to the magnet assembly. Fixed sliders are evenly distributed around the mounting base and slide in conjunction with the magnet assembly.

[0012] In one possible design, the magnet assembly includes: A magnet fixing base is provided with a magnet guide rail at the upper end of the magnet fixing base, and the magnet guide rail slides in cooperation with the fixed slider; The main body of the magnet is installed in the magnet mounting base.

[0013] In one possible design, a fourth drive unit is provided on the mounting base. The fourth drive unit is located at the upper end of the mounting base and is connected to the spindle drive to drive the spindle to rotate. A disk mounting plate is also connected to the upper end of the mounting base, and the middle part of the disk mounting plate is connected to the lower end of the second drive unit.

[0014] On the other hand, this application also provides a permanent magnet induction heating method, employing a permanent magnet induction heating device as described above, the method comprising: The adaptive chuck moves radially according to the outer diameter of the incoming hub to clamp the hub. The magnetic steel assembly adjusts the heating air gap by moving radially according to the inner diameter of the incoming material hub; The flexible disk adjusts its heating depth by moving along the height of the machine according to the inner depth of the incoming material hub. The wheel hub chuck assembly rotates around its own axis, causing the wheel hub to rotate and thus heating the wheel hub.

[0015] The beneficial effects of this application are as follows: The permanent magnet induction heating device of this application adopts a hub rotation and flexible disk fixation mode, which structurally eliminates the eccentricity and vibration problems caused by disk rotation in traditional equipment. This ensures uniform air gap between the magnet assembly and the inner wall of the hub, effectively reducing the temperature deviation and defect rate in the circumferential direction of the hub, and meeting the stringent requirements of temperature consistency in high-precision spinning processes. Compared with the existing technology of flexible disk rotation heating and disk diameter change using a planetary gear structure, the magnet is less prone to tipping or detachment, ensuring the stability and safety of the flexible disk.

[0016] The magnetic field generated by the fixed flexible disk can concentrate and cover the effective heating area of ​​the inner wall of the wheel hub, avoiding the energy waste caused by the diffusion of the magnetic field in traditional rotating disks. According to actual tests, under the same heating effect, the unit wheel hub heating energy consumption of this application is reduced by 20%-30% compared with traditional equipment, which meets the current development needs of energy conservation, environmental protection and cost reduction and efficiency improvement in the manufacturing industry.

[0017] The wheel hub chuck assembly's clamping arms are radially adjustable to accommodate different wheel hub outer diameters, while the flexible disk's magnet assembly is radially adjustable to accommodate different wheel hub inner diameters. This allows for compatibility with mainstream passenger vehicle wheel hubs ranging from 14 to 22 inches without the need to replace core components such as the disk and chucks. The adaptive chuck grips the wheel hub, enabling automatic centering and eliminating the need for alignment adjustments, thus improving heating cycle time.

[0018] The permanent magnet induction heating method provided in this application, by employing the permanent magnet induction heating device described in this application, simultaneously incorporates all the aforementioned advantages of the permanent magnet induction heating device. Attached Figure Description

[0019] To more clearly illustrate the technical solutions in the specific embodiments of this application or the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this application. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0020] Figure 1 A schematic diagram of the permanent magnet induction heating device provided in the embodiments of this application. Figure 1 ; Figure 2 A schematic diagram of the permanent magnet induction heating device provided in the embodiments of this application. Figure 2 ; Figure 3 A schematic diagram of the permanent magnet induction heating device provided in the embodiments of this application. Figure 3 ; Figure 4 A schematic diagram of the hub claw assembly of the permanent magnet induction heating device provided in this application being mounted on a machine base; Figure 5 A schematic diagram of the hub claw assembly of the permanent magnet induction heating device provided in the embodiments of this application; Figure 6 A schematic diagram of the flexible disk of the permanent magnet induction heating device provided in this application being mounted on a machine base; Figure 7 A schematic diagram of the structure of the flexible disk of the permanent magnet induction heating device provided in the embodiments of this application. Figure 1 ; Figure 8 A schematic diagram of the structure of the flexible disk of the permanent magnet induction heating device provided in the embodiments of this application. Figure 2 ; Figure 9 An internal cross-sectional view of the flexible disk of the permanent magnet induction heating device provided in the embodiments of this application; Figure 10A partial enlarged view of the flexible disk of the permanent magnet induction heating device provided in the embodiments of this application; Figure 11 A component assembly diagram of the flexible disk of the permanent magnet induction heating device provided in the embodiments of this application; Figure 12 This is a schematic diagram of the adjustment drive mechanism of the permanent magnet induction heating device provided in the embodiments of this application.

[0021] Figure label: 100. Machine base; 110. Protective cover; 111. Observation window; 200. Hub chuck assembly; 210. Base; 2101. Guide rail mounting slot; 220. Adjustable guide rail; 2201. Adjustable slider; 230. Clamping arm; 240. Adaptive chuck; 250. Adjustment drive mechanism; 251. Adjusting screw; 252. Adjusting nut; 253. Third drive component; 254. First bevel gear; 255. Second bevel gear; 310. Second drive component; 320. Disk mounting plate; 330. Flexible disk; 331. Connecting base 332. Mounting base; 333. Spindle; 334. Large bevel gear; 335. Gear bracket; 3351. Mounting hole; 336. Small bevel gear; 337. End cap; 338. Fixed slider; 339. Magnet assembly; 3391. Magnet fixing seat; 33911. Magnet guide rail; 3392. Magnet body; 340. Flange nut; 341. Fourth drive component; 342. Axle; 3421. Threaded section; 343. In-hole bearing; 344. Lower bearing; 345. Upper bearing; 400. First drive component; 500. Hub. Detailed Implementation

[0022] The technical solutions of this application will be clearly and completely described below with reference to the embodiments. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0023] The following is combined with Figures 1-12 This application describes the permanent magnet induction heating device and heating method provided in the embodiments of this application.

[0024] Reference Figure 1 , Figure 2 , Figure 3 As shown, the permanent magnet induction heating device provided in this application embodiment includes a machine base 100, a wheel hub claw assembly 200, a flexible disk 330, and various driving components. The components work together to achieve automated heating of the wheel hub.

[0025] The machine base 100 serves as the basic support component for the equipment, housing the hub chuck assembly 200, the flexible disk 330, and various drive components. A protective cover 110 is installed on the outside of the machine base 100 to prevent human contact with the high-speed rotating components and to block any projectiles that may be generated during operation. An acrylic observation window 111 is provided on the side of the protective cover 110, allowing operators to monitor the equipment's operating status in real time.

[0026] Reference Figure 4 , Figure 5 As shown, the wheel hub gripper assembly 200 is located in the middle of the machine base 100 and is used to grip the wheel hub 500 and drive it to rotate. The wheel hub gripper assembly 200 includes a base 210, multiple adjusting guide rails 220, multiple clamping arms 230, multiple adaptive chucks 240, and an adjusting drive mechanism 250. The center of the base 210 is connected to the first driving member 400, which is preferably a permanent magnet motor. Multiple guide rail mounting slots 2101 are evenly opened on the upper surface of the base 210 along the circumference. The guide rail mounting slots 2101 extend radially along the base 210. Multiple adjustable guide rails 220 are respectively embedded in the corresponding guide rail mounting slots 2101. An adjustable slider 2201 is slidably arranged on each adjustable guide rail 220. The clamping arm 230 is fixedly connected to the adjustable slider 2201. The clamping arm 230 moves radially along the adjustable guide rail 220 with the adjustable slider 2201 to realize the adjustment of the clamping diameter to adapt to the outer wall of the hub of different specifications.

[0027] The adaptive chuck 240 is mounted inside the clamping arm 230. The adaptive chuck 240 and clamping arm 230 are hinged via a ball joint, allowing it to adaptively deflect according to the angle of the wheel hub end face, ensuring a close fit to the outer wall of the wheel hub. The inner side of the adaptive chuck 240 is equipped with replaceable contact pads; for example, soft rubber pads are suitable for low-hardness wheel hubs, while hard alloy pads are suitable for high-hardness wheel hubs. The contact pads have built-in pressure sensors. When the clamping force reaches a set value, the pressure sensor sends a signal to the control system, automatically stopping the clamping action to prevent damage to the wheel hub.

[0028] An adjustment drive mechanism 250 is located at the center of the base 210 and is used to drive the clamping arm 230 to move radially. The adjustment drive mechanism 250 includes an adjustment screw 251, an adjustment nut 252, and a third drive member 253. The adjustment screw 251 is arranged along the length of the adjustment guide rail 220, with its inner end connected to the third drive member 253, and the outer end fitted with the adjustment nut 252, which is fixed to the clamping arm 230. The third drive member 253 drives the adjustment screw 251 to rotate, causing the adjustment nut 252 and the clamping arm 230 to move synchronously radially, achieving precise adjustment of the clamping diameter. In some embodiments, refer to... Figure 12As shown, the third driving component 253 is a servo motor. A first bevel gear 254 is sleeved on the output shaft of the servo motor, and a second bevel gear 255 is sleeved on the inner end of each adjusting screw 251. The first bevel gear 254 and the second bevel gear 255 mesh with each other, converting the axial power of the servo motor into radial power, which is then transmitted to the corresponding adjusting screw 251. In some embodiments, the third driving component 253 includes multiple servo motors, and the power output end of each servo motor is connected to the corresponding adjusting screw 251.

[0029] Reference Figure 6 , Figure 7 , Figure 8 As shown, the flexible disk 330 is positioned directly above the hub claw assembly 200 and is mounted on the machine base 100 via the disk mounting plate 320. Specifically, the flexible disk 330 is mounted at the lower end of the disk mounting plate 320, and the upper end of the disk mounting plate 320 is provided with multiple guide rods. The upper ends of the guide rods pass through guide holes in the machine base 100. The center of the disk mounting plate 320 is also connected to the second drive component 310, which is preferably a downward-pressing electric cylinder. The downward-pressing electric cylinder can drive the disk mounting plate 320 and the flexible disk 330 to move along the height direction of the machine base 100 to adjust the heating depth of the flexible disk 330. At the same time, the flexible disk 330 can also be radially adjusted via the magnet assembly 339 to adapt to different hub inner diameters.

[0030] The flexible disk 330 specifically includes a connecting base 331, a mounting base 332, an end cover 337, a spindle 333, a bevel gear drive structure, multiple magnet assemblies 339, and various drive components.

[0031] Reference Figure 9 , Figure 10 , Figure 11As shown, the upper end of the connecting base 331 is fixed to the disk mounting plate 320, and the lower end of the connecting base 331 is connected to the mounting base 332. The mounting base 332 and the end cover 337 are coaxially arranged vertically, forming a mounting chamber between the mounting base 332 and the end cover 337. The spindle 333 is vertically arranged between the mounting base 332 and the end cover 337. The upper end of the spindle 333 is rotatably connected to the mounting base 332 through the upper bearing 345, and the lower end of the spindle 333 is rotatably connected to the end cover 337 through the lower bearing 344. A large bevel gear 334 is sleeved in the middle of the spindle 333. A gear bracket 335 is provided in the mounting chamber between the mounting base 332 and the end cover 337. The gear bracket 335 has a clearance hole at its center for the main shaft 333 to pass through. Multiple radial mounting holes 3351 are evenly distributed along the circumference of the gear bracket 335. A small bevel gear 336 is installed in each mounting hole 3351 through an in-hole bearing 343. All the small bevel gears 336 mesh with large bevel gears 334. A wheel axle 342 is also provided in each mounting hole 3351. The inner end of the wheel axle 342 passes through the center hole of the small bevel gear 336, and the outer end of the wheel axle 342 has a threaded section 3421.

[0032] Multiple magnet components 339 are evenly distributed circumferentially on the outer side of the gear bracket 335. Each magnet component 339 includes a magnet fixing base 3391 and a magnet body 3392. The magnet body 3392 is embedded in the magnet fixing base 3391. The upper end of the magnet fixing base 3391 is provided with a magnet guide rail 33911. The lower end of the mounting base 332 is evenly distributed with multiple fixing sliders 338. The magnet guide rail 33911 and the fixing sliders 338 slide in a one-to-one correspondence to ensure that each magnet component 339 can move smoothly in the radial direction.

[0033] A fourth drive unit 341 is provided at the upper end of the mounting base 332. The fourth drive unit 341 is preferably a servo motor, and its output end is connected to the main shaft 333 for transmission. A flange nut 340 is fitted onto the threaded section 3421 at the outer end of the axle 342. The flange face of the flange nut 340 is connected to the magnet fixing seat 3391 by screws. The fourth drive unit 341 drives the main shaft 333 to rotate, which in turn drives each axle 342 to rotate through the large bevel gear 334 and each small bevel gear 336. The flange nut 340 moves along the threaded section 3421 as the axle 342 rotates, thereby pulling the magnet assembly 339 to extend and retract radially, achieving precise adjustment of the outer diameter of the magnet.

[0034] Temperature sensors are also installed around the wheel hub on the machine 100 to monitor the wheel hub temperature in real time.

[0035] In addition, the first drive component 400 is connected to the PLC control system via a frequency converter, driving the hub gripper assembly 200 to rotate around its own axis; the second drive component 310 is controlled by the PLC control system, driving the flexible disk 330 to move along the height direction, with an adjustment range adapted to hubs of different depths; the third drive component 253 and the fourth drive component 341 are both linked with the PLC control system to realize the automated adjustment of the clamping arm 230 and the magnet assembly 339. The PLC control system connects to the pressure sensor, temperature sensor, and each drive component to realize automatic matching of heating parameters, real-time monitoring of the heating process, and alarm for heating anomalies.

[0036] This application also provides a permanent magnet induction heating method, which uses the permanent magnet induction heating device described in the above embodiments. The specific heating steps are as follows: Step 1: Incoming material inspection and parameter matching.

[0037] The sensor on the material receiving platform detects the outer diameter, inner diameter, depth, and initial temperature of the wheel hub 500 to be heated, and transmits the data to the PLC control system. The PLC control system automatically matches heating parameters according to the wheel hub specifications, including the clamping diameter of the wheel hub claw assembly 200, the outer diameter of the magnet of the flexible disk 330, the heating depth of the flexible disk 330, the rotation speed of the first drive component 400, the target heating temperature, and the heating time.

[0038] Step 2: The wheel hub chuck assembly 200 clamps the wheel hub.

[0039] The robotic arm moves the wheel hub blank above the wheel hub chuck assembly 200. The third drive component 253 is activated, driving the clamping arm 230 to retract radially. The adaptive chuck 240 fits against the outer wall of the wheel hub. After the pressure sensor detects the set clamping force, the third drive component 253 stops, completing the automatic centering of the wheel hub.

[0040] Step 3: Align the flexible disk 330.

[0041] The fourth drive unit 341 is activated, and through the linkage of the main shaft 333, the large bevel gear 334, the small bevel gear 336 and the wheel axle 342, the magnet assembly 339 is moved radially, adjusting the outer diameter of the magnet of the flexible disk 330 to match the inner diameter of the wheel hub. The second drive unit 310 is activated, driving the flexible disk 330 to descend along the height direction of the machine tool 100 until the magnet assembly 339 extends into the set heating area of ​​the inner cavity of the hub, completing the adjustment of the disk heating depth, and the second drive unit 310 stops.

[0042] Step 4: Induction heating of wheel hubs.

[0043] The PLC control system sends a command to the frequency converter, and the first drive unit 400 (permanent magnet motor) starts, driving the wheel hub claw assembly 200 and the wheel hub to rotate at high speed; The fixed magnet assembly 339 generates a constant magnetic field. The rotating hub cuts the magnetic field lines and generates eddy currents. The hub temperature gradually increases, and the temperature sensor feeds back the hub temperature data to the PLC control system in real time. When the hub temperature reaches the set target temperature or the heating time reaches the set value, the PLC control system sends a command to stop the first drive unit 400, and the heating process ends.

[0044] Step 5: Reset and material change cycle.

[0045] The second drive unit 310 is activated, driving the flexible disk 330 to rise to the safe area; at the same time, the third drive unit 253 drives the clamping arm 230 to open radially, releasing the heated hub. The robotic arm transfers the heated wheel hub to the spinning process, and simultaneously places the new wheel hub to be heated on the wheel hub claw assembly 200; The equipment automatically repeats steps 1-4 above to enter the next heating cycle, realizing continuous automated production of wheel hub heating.

[0046] In the description of this application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.

[0047] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this application, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0048] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a connection that allows communication between components; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise expressly limited. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0049] In this application, the terms "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., refer to a specific feature, structure, material, or characteristic described in connection with that embodiment or example, which is included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0050] Although embodiments of this application have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting this application. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of this application.

Claims

1. A permanent magnet induction heating device, characterized by, include: Machine tool; A wheel hub chuck assembly is provided on the machine base and includes multiple circumferentially distributed adaptive chucks. The adaptive chucks adjust the diameter of their inner circles by moving radially to clamp wheel hubs with different outer diameters. The wheel hub chuck assembly can rotate around its own axis to drive the wheel hub to rotate. A flexible disk is disposed on the machine platform and coaxially arranged with the hub claw assembly. The flexible disk includes a plurality of circumferentially distributed magnetic steel assemblies. The magnetic steel assemblies can adjust the diameter of their outer circle by moving radially to adapt to hubs with different inner circle diameters.

2. The permanent magnet induction heating device of claim 1, wherein, The machine tool is provided with a first driving component and a second driving component. The output end of the first driving component is connected to the hub claw assembly for driving the hub claw assembly to rotate around its own axis and thus drive the hub to rotate. The output end of the second driving component is connected to the flexible disk and is used to drive the flexible disk to move along the height direction of the machine tool to adjust the heating depth of the flexible disk.

3. The permanent magnet induction heating device of claim 2, wherein, The wheel hub chuck assembly includes: The base, the center of which is connected to the first driving member in a transmission manner; The adjustable guide rails include multiple rails, which are evenly distributed circumferentially on the base, and each rail extends radially along the base. Clamping arms, including multiple clamping arms, are respectively disposed on the corresponding adjustment guide rails and can slide along the adjustment guide rails. The adaptive chuck is installed on the inner side of the clamping arm and is hinged to the clamping arm. An adjustment drive mechanism is located in the middle of the base and is used to drive the clamping arm to slide along the adjustment guide rail.

4. The permanent magnet induction heating device of claim 3, wherein, The adjustment drive mechanism includes: An adjusting screw is provided along the length direction of the adjusting guide rail; An adjusting nut is sleeved on the outer end of the adjusting screw and connected to the clamping arm; The third driving component is connected to the inner end of the adjusting screw and is used to drive the adjusting screw to rotate, thereby causing the adjusting nut and the clamping arm to move radially.

5. The permanent magnet induction heating device according to any one of claims 1-4, characterized in that, The adaptive chuck is equipped with a pressure sensor; and / or, the inner side of the adaptive chuck is provided with a fitting pad.

6. The permanent magnet induction heating device according to any one of claims 2-4, wherein, The flexible disk includes: Mounting base; An end cap is disposed below the mounting base; A main shaft, one end of which is rotatably connected to a mounting base and the other end of which is rotatably connected to an end cover, and a large bevel gear is fitted on the main shaft; A gear bracket is disposed between the mounting base and the end cover. The gear bracket has a clearance hole at its center for the main shaft to pass through, and the gear bracket has a plurality of radial mounting holes evenly distributed circumferentially. Multiple axles are respectively set in the corresponding mounting holes. The inner end of the axle is fitted with small bevel teeth, which mesh with large bevel teeth. The outer end of the axle has a threaded section, which is threadedly connected to the magnet assembly. The main shaft rotates to drive the axles to rotate, thereby driving the magnet assembly to move radially.

7. The permanent magnet induction heating device of claim 6, wherein, The flexible disk also includes: A flange nut, the center of which is threaded into the threaded section, and the flange face of which is connected to the magnet assembly; A fixed slider is evenly distributed circumferentially on the mounting base and slides in cooperation with the magnet assembly.

8. The permanent magnet induction heating device of claim 7, wherein, The magnet assembly includes: A magnet fixing base, wherein a magnet guide rail is provided at the upper end of the magnet fixing base, and the magnet guide rail is slidably engaged with the fixing slider; The magnet body is installed in the magnet mounting base.

9. The permanent magnet induction heating device of claim 6, wherein, A fourth driving component is provided on the mounting base. The fourth driving component is located at the upper end of the mounting base and is connected to the spindle for driving the spindle to rotate. A disk mounting plate is also connected to the upper end of the mounting base, and the middle part of the disk mounting plate is connected to the lower end of the second driving component.

10. A permanent magnet induction heating method, characterized by: The method using the permanent magnet induction heating device according to any one of claims 1-9 includes: The adaptive chuck moves radially according to the outer diameter of the incoming hub to clamp the hub. The magnetic steel assembly adjusts the heating air gap by moving radially according to the inner diameter of the incoming material hub; The flexible disk adjusts its heating depth by moving along the height of the machine according to the inner depth of the incoming material hub. The wheel hub chuck assembly rotates around its own axis, causing the wheel hub to rotate and thus heating the wheel hub.

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