Method and device for rotating hub permanent magnet heating

Abstract

This invention discloses a method and apparatus for rotating wheel hub permanent magnet heating, comprising: a permanent magnet assembly including an annular truncated cone and a plurality of permanent magnets arranged around the side of the annular truncated cone, wherein the outward magnetic poles of the permanent magnets face the outer side of the annular truncated cone and the inward magnetic poles face the inner side of the annular truncated cone; a wheel hub positioning disk located above the permanent magnet assembly and driven to rotate by a drive motor; and a pressing mechanism including a rotatable pressure plate located above the wheel hub positioning disk, wherein the rotatable pressure plate can be driven to press down to position the wheel hub on the wheel hub positioning disk.

Description

Technical Field

[0001] This invention belongs to the field of metal heating, and specifically relates to a method and apparatus for permanent magnet heating of a rotating hub. Background Technology

[0002] In recent years, my country's automotive industry has experienced rapid development, and the automotive wheel industry has undergone a transformation from steel wheels to aluminum alloy wheels. With increasing demands for vehicle safety, environmental protection, and energy conservation, aluminum alloy wheels, with their aesthetic appeal, lightweight, energy efficiency, good heat dissipation, corrosion resistance, and superior processing performance, have gradually become the mainstream choice in the passenger vehicle market. Currently, aluminum alloy is the primary material for automotive wheels. In the future, with the expansion of the global automotive market and consumers' increasing demands for vehicle performance and appearance, the automotive wheel market will continue to grow.

[0003] In the wheel manufacturing industry, wheel castings need to be heated before being spun into shape. Currently, gas heating is commonly used in the industry. The main disadvantages of traditional gas-heated wheel heating are: 1. High energy consumption: Because gas heating inevitably releases a large amount of heat, its energy efficiency is not high.

[0004] 2. Overall Heating: Gas-fired heating creates a high-temperature atmosphere within the heating chamber, heating the entire wheel hub. However, in subsequent processing, only a portion of the wheel hub needs to be at a high temperature.

[0005] This invention utilizes the high efficiency of magneto-electric-thermal conversion to propose a structure that solves the problem of high energy consumption in traditional heating. Summary of the Invention

[0007] The technical problem this invention aims to solve is to provide a method and apparatus for rotating wheel hub permanent magnet heating. A relative motion is created between the wheel hub and the magnetic field, which induces eddy currents in the heating area of ​​the wheel hub, thereby targeting and heating a specific area of ​​the wheel hub. The high efficiency of magneto-electric-thermal conversion and the advantage of targeted heating overcome the shortcomings of traditional heating methods. This invention can be used for heating wheel hubs made of materials such as aluminum alloy, aluminum-magnesium alloy, and carbon steel.

[0008] To solve the above-mentioned technical problems, the present invention adopts the following technical solution: On one hand, a method for heating a rotating hub with a permanent magnet includes the following steps: a. Prepare a permanent magnet heating device for the rotating wheel hub, specifically including: A permanent magnet assembly includes a frustum and a plurality of permanent magnets arranged around the side of the frustum, wherein the outward magnetic poles of the permanent magnets face the outer side of the frustum and the inward magnetic poles face the inner side of the frustum. A hub positioning disc, located above the permanent magnet assembly, is driven to rotate by a drive motor to position and support the hub. The pressing mechanism includes a hydraulically driven movable plate and a rotatable pressure plate movably connected to the movable plate, and is disposed above the wheel hub positioning plate. The rotatable pressure plate can be driven to press down to position the wheel hub on the wheel hub positioning plate.

[0009] b. Position the hub by placing the hub cavity downwards onto the hub positioning plate, so that the rim area of ​​the hub encompasses the permanent magnet, with the rim area adjacent to the outward magnetic pole of the permanent magnet.

[0010] c. Adjust the tilt angle of the permanent magnet according to the rim camber angle of the hub to be heated, so that the outer magnetic pole of the permanent magnet faces the inner diameter surface of the rim of the hub; d. Drive the pressing mechanism downwards so that the rotatable pressure plate presses against the wheel hub on the wheel hub positioning plate; e. The drive motor drives the hub positioning disk, causing the hub to rotate. The rim area of ​​the hub rotates adjacent to the permanent magnet and induces eddy currents, thereby heating the rim area of ​​the hub.

[0011] In step c, the permanent magnets in the permanent magnet assembly are arranged in a ring array. The inner magnetic poles of adjacent permanent magnets are opposite in polarity, and the outer magnetic poles are opposite in polarity. Adjacent permanent magnets are separated by magnetic isolation components.

[0012] The magnetic axis of the permanent magnet is kept at a predetermined angle to the inner diameter surface of the wheel hub rim, preferably 90 degrees.

[0013] The pressing mechanism also includes several cylinders that movably support the movable plate through several linear bearings. The hub positioning disk is located below the movable plate and moves with the movable plate. The rotation shaft of the hub positioning disk is located in the annular truncated cone. The rotation shaft supports the positioning disk surface of the hub positioning disk, and the lower end of the rotation shaft is connected to the drive motor.

[0014] The permanent magnet assembly can be driven to rotate in the opposite direction to the rotation of the hub.

[0015] On one hand, a rotating hub permanent magnet heating device includes: A permanent magnet assembly includes a frustum and a plurality of permanent magnets arranged around the side of the frustum, wherein the outward magnetic poles of the permanent magnets face the outer side of the frustum and the inward magnetic poles face the inner side of the frustum. A hub positioning disc, located above the permanent magnet assembly, is driven to rotate by a drive motor; The pressing mechanism includes a hydraulically driven movable plate and a rotatable pressure plate movably connected to the movable plate, and is disposed above the wheel hub positioning plate. The rotatable pressure plate can be driven to press down to position the wheel hub on the wheel hub positioning plate.

[0016] The permanent magnets in the permanent magnet assembly are arranged in a ring array. The inner magnetic poles of adjacent permanent magnets have opposite polarities, and the outer magnetic poles have opposite polarities. Adjacent permanent magnets are separated by magnetic isolation components. The tilt angle of the permanent magnets matches the outer tilt angle of the rim of the wheel hub to be heated, so that the outer magnetic poles of the permanent magnets face the inner diameter surface of the rim of the wheel hub.

[0017] The magnetic axes of the permanent magnets are all perpendicular to the inner diameter surface of the wheel hub's rim.

[0018] The pressing mechanism also includes several cylinders that movably support the movable plate through several linear bearings. The hub positioning disk is located below the movable plate and moves with the movable plate. The rotation shaft of the hub positioning disk is located in the annular truncated cone. The rotation shaft supports the positioning disk surface of the hub positioning disk, and the lower end of the rotation shaft is connected to the drive motor.

[0019] The permanent magnet assembly can be driven to rotate in the opposite direction to the rotation of the hub.

[0020] The method and apparatus for rotating hub permanent magnet heating of the present invention have the following advantages: 1. The invention describes a method where "the rim area of ​​the wheel hub encompasses the permanent magnet, with the rim area adjacent to the outward magnetic pole of the permanent magnet. The tilt angle of the permanent magnet is adjusted according to the rim camber angle of the wheel hub to be heated, so that the outer magnetic pole of the permanent magnet faces the inner diameter surface of the rim of the wheel hub." This method enables localized heating of the wheel hub, optimizes the traditional method of overall wheel hub heating, significantly reduces costs, and improves efficiency.

[0021] 2. The overall structure of the heating device is scientifically and rationally designed, which can effectively realize the relative movement between the heated part of the wheel hub and the permanent magnet, generate induced eddy currents, and achieve local heating. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the rotating hub permanent magnet heating device of the present invention; Figure 2 This is a schematic diagram of the structure of the annular frustum of the permanent magnet component of the present invention; Figure 3 This is a schematic diagram of the permanent magnet pole distribution of the permanent magnet component of the present invention; Figure 4 A schematic diagram of the wheel hub to be heated being fitted onto the wheel hub positioning plate; Figure 5 for Figure 4Axial sectional view; Figure 6 for Figure 5 A decomposed two-dimensional diagram; Figure 7 for Figure 5 The decomposed three-dimensional diagram. Detailed Implementation

[0023] See Figure 1 , Figure 2 , Figure 3 This invention provides a method for permanent magnet heating of a rotating hub, comprising the following steps: a. Prepare a permanent magnet heating device for the rotating wheel hub, specifically including: Permanent magnet assembly 110, see Figure 2 It includes a frustum 111 and a plurality of permanent magnets 112 arranged around the side of the frustum. The outward magnetic poles of the permanent magnets face the outer side of the frustum, and the inward magnetic poles face the inner side of the frustum. See [link to documentation]. Figure 3 , Figure 3 It's a bird's-eye view. Figure 2 The angle shows the magnetic pole distribution of permanent magnet 112.

[0024] The hub positioning disk 120 is located above the permanent magnet assembly 110 and is driven to rotate by a drive motor 121. Specifically, the rotation shaft 122 of the hub positioning disk 120 passes through the center of the permanent magnet assembly 110, which is the center of the annular frustum 111. The rotation shaft 122 supports the positioning disk surface of the hub positioning disk 120, and the lower end of the rotation shaft 122 is connected to the drive motor 121.

[0025] The pressing mechanism 130 includes a rotatable pressing plate 131, which is disposed above the wheel hub positioning plate 120. The rotatable pressing plate 131 is driven downward by a cylinder 132 to press down and position the wheel hub on the wheel hub positioning plate 120. Specifically, the rotatable pressing plate 131 can be disposed below a movable plate 133, which is movably supported by four columns. The cylinder 132 drives the movable plate 133 downward, and the movable plate 133 drives the rotatable pressing plate 131 to move downward to achieve the pressing action.

[0026] b. See also Figure 4 , Figure 5 , Figure 6 , Figure 7 Positioning is achieved by placing the cavity of the hub 140 downwards onto the hub positioning plate 120, so that the rim area 141 of the hub 140 encompasses the permanent magnet 112, with the rim area 141 adjacent to the outward magnetic pole of the permanent magnet 112.

[0027] c. Adjust the tilt angle of the permanent magnet 112 according to the outward tilt angle of the rim 141 of the hub 140 to be heated, until the outer magnetic pole of the permanent magnet 112 faces the inner diameter surface of the rim 141 of the hub 140. Preferably, adjust it so that the magnetic axis of the permanent magnet 112 is perpendicular to the inner diameter surface of the rim of the hub, which can achieve a better heating effect. As an embodiment, the permanent magnets 112 in the permanent magnet assembly 110 are arranged in a ring array. The inner magnetic poles of adjacent permanent magnets have opposite polarities, and the outer magnetic poles have opposite polarities. Adjacent permanent magnets are separated by a magnetic isolation member 113. See [link to documentation]. Figure 3 Each permanent magnet is magnetized radially (with the inner magnetic pole facing the center and the outer magnetic pole facing away from the center). When the inner magnetic pole of the first permanent magnet is the N pole, the second magnet is the S pole, and so on, ensuring that the magnetic field is uniformly surrounding the magnet.

[0028] d. Drive the pressing mechanism 130 downward so that the rotatable pressing plate 131 presses against the wheel hub 140 on the wheel hub positioning plate 120; e. The drive motor 121 drives the hub positioning disk 120, causing the hub 140 to rotate. The area of ​​the rim 141 of the hub rotates adjacent to the permanent magnet 112 and induces eddy currents, thereby heating the area of ​​the rim 141 of the hub 140.

[0029] As one embodiment, the pressing mechanism 130 further includes several cylinders that movably support the movable plate 133 via several linear bearings. The hub positioning disk 120 is located below the movable plate 133 and moves with the movable plate 133. The rotation shaft 122 of the hub positioning disk 120 is located in the annular frustum 111. The rotation shaft 122 supports the positioning disk surface of the hub positioning disk 120, and the lower end of the rotation shaft 122 is connected to the drive motor 121.

[0030] As one embodiment, the permanent magnet assembly 110 can be driven to rotate in the opposite direction to the rotation of the hub 140.

[0031] On the other hand, the present invention also relates to a rotating hub permanent magnet heating device, comprising: The permanent magnet assembly 110 includes an annular frustum 111 and a plurality of permanent magnets 112 arranged around the side of the annular frustum 111. The outward magnetic poles of the permanent magnets 112 face the outside of the annular frustum 111, and the inward magnetic poles face the inside of the annular frustum 111. The hub positioning disk 120 is located above the permanent magnet assembly 110 and is driven to rotate by a drive motor 121. The pressing mechanism 130 includes a hydraulically driven movable plate 133 and a rotatable pressure plate 131 movably connected to the movable plate 133. It is disposed above the wheel hub positioning plate 120. The rotatable pressure plate 131 can be driven to press down to position the wheel hub 140 on the wheel hub positioning plate 120.

[0032] The permanent magnets 112 in the permanent magnet assembly 110 are arranged in a ring array. The inner magnetic poles of adjacent permanent magnets 112 are opposite in polarity, and the outer magnetic poles are opposite in polarity. Adjacent permanent magnets 112 are separated by a magnetic shielding element 113. The tilt angle of the permanent magnets 112 matches the outer tilt angle of the rim 141 of the hub to be heated, so that the outer magnetic poles of the permanent magnets 112 face the inner diameter surface of the rim 141 of the hub 140.

[0033] The magnetic axes of the permanent magnets 112 are all perpendicular to the inner diameter surface of the rim 141 of the hub 140.

[0034] The pressing mechanism 130 also includes several cylinders that movably support the movable plate 133 via several linear bearings. The hub positioning disk 120 is located below the movable plate 133 and moves with the movable plate 133. The rotation shaft 122 of the hub positioning disk 120 is located in the annular frustum 111. The rotation shaft 122 supports the positioning disk surface of the hub positioning disk 120, and the lower end of the rotation shaft 122 is connected to the drive motor 121.

[0035] The permanent magnet assembly 110 can be driven to rotate in the opposite direction to the rotation of the hub 140.

[0036] Note that for any technical content and description not mentioned in the section on a rotating hub permanent magnet heating device, please refer to the technical content and description in the section on a rotating hub permanent magnet heating method.

[0037] However, those skilled in the art should recognize that the above embodiments are only used to illustrate the present invention and are not intended to limit the present invention. Any changes or modifications to the above embodiments that are within the essential spirit of the present invention will fall within the scope of the claims of the present invention.

Claims

1. A method of rotating hub permanent magnet heating, characterized by, Includes the following steps: a. Prepare a permanent magnet heating device for the rotating wheel hub, specifically including: A permanent magnet assembly includes a frustum and a plurality of permanent magnets arranged around the side of the frustum, wherein the outward magnetic poles of the permanent magnets face the outer side of the frustum and the inward magnetic poles face the inner side of the frustum. A hub positioning disc, located above the permanent magnet assembly, is driven to rotate by a drive motor to position and support the hub. The pressing mechanism includes a hydraulically driven movable plate and a rotatable pressure plate movably connected to the movable plate, and is disposed above the wheel hub positioning plate. The rotatable pressure plate can be driven to press down to position the wheel hub on the wheel hub positioning plate. b. Position the hub by placing the hub cavity downwards onto the hub positioning plate, so that the rim area of ​​the hub encompasses the permanent magnet, with the rim area adjacent to the outward magnetic pole of the permanent magnet. c. Adjust the tilt angle of the permanent magnet according to the rim camber angle of the hub to be heated, so that the outer magnetic pole of the permanent magnet faces the inner diameter surface of the rim of the hub; d. Drive the pressing mechanism downwards so that the rotatable pressure plate presses against the wheel hub on the wheel hub positioning plate; e. The drive motor drives the hub positioning disk, causing the hub to rotate. The rim area of ​​the hub rotates adjacent to the permanent magnet and induces eddy currents, thereby heating the rim area of ​​the hub.

2. The method of rotary wheel hub permanent magnet heating of claim 1, wherein, In step c, the permanent magnets in the permanent magnet assembly are arranged in a ring array. The inner magnetic poles of adjacent permanent magnets are opposite in polarity, and the outer magnetic poles are opposite in polarity. Adjacent permanent magnets are separated by magnetic isolation components.

3. The method of claim 2, wherein, The magnetic axis of the permanent magnet is kept at a predetermined angle to the inner diameter surface of the wheel hub rim.

4. The method of rotary wheel hub permanent magnet heating of claim 1, wherein, The pressing mechanism also includes several cylinders that movably support the movable plate through several linear bearings. The hub positioning disk is located below the movable plate and moves with the movable plate. The rotation shaft of the hub positioning disk is located in the annular truncated cone. The rotation shaft supports the positioning disk surface of the hub positioning disk, and the lower end of the rotation shaft is connected to the drive motor.

5. The method for permanent magnet heating of a rotating hub according to claim 1 or 4, characterized in that, The permanent magnet assembly can be driven to rotate in the opposite direction to the rotation of the hub.

6. A rotating hub permanent magnet heating device, characterized in that, include: A permanent magnet assembly includes a frustum and a plurality of permanent magnets arranged around the side of the frustum, wherein the outward magnetic poles of the permanent magnets face the outer side of the frustum and the inward magnetic poles face the inner side of the frustum. A hub positioning disc, located above the permanent magnet assembly, is driven to rotate by a drive motor; The pressing mechanism includes a hydraulically driven movable plate and a rotatable pressure plate movably connected to the movable plate, and is disposed above the wheel hub positioning plate. The rotatable pressure plate can be driven to press down to position the wheel hub on the wheel hub positioning plate.

7. The rotating hub permanent magnet heating device according to claim 6, characterized in that, The permanent magnets in the permanent magnet assembly are arranged in a ring array. The inner magnetic poles of adjacent permanent magnets have opposite polarities, and the outer magnetic poles have opposite polarities. Adjacent permanent magnets are separated by magnetic isolation components. The tilt angle of the permanent magnets matches the outer tilt angle of the rim of the wheel hub to be heated, so that the outer magnetic poles of the permanent magnets face the inner diameter surface of the rim of the wheel hub.

8. The rotating hub permanent magnet heating device according to claim 7, characterized in that, The magnetic axes of the permanent magnets are all perpendicular to the inner diameter surface of the wheel hub's rim.

9. The rotating hub permanent magnet heating device according to claim 7, characterized in that, The pressing mechanism also includes several cylinders that movably support the movable plate through several linear bearings. The hub positioning disk is located below the movable plate and moves with the movable plate. The rotation shaft of the hub positioning disk is located in the annular truncated cone. The rotation shaft supports the positioning disk surface of the hub positioning disk, and the lower end of the rotation shaft is connected to the drive motor.

10. The rotating hub permanent magnet heating device according to claim 6 or 9, characterized in that, The permanent magnet assembly can be driven to rotate in the opposite direction to the rotation of the hub.

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