Curing Process for a Combined Structure of a Permanent Magnet Levitation Track Unit

Abstract

The present invention provides a curing process for a permanent magnetic suspension track unit combination structure, comprising the following steps: (1) opening a positioning hole on the side of the permanent magnet, and opening a plurality of small through holes at a relative position on the side of the base; (2) using an assembly tool to assemble the permanent magnet to the base in a Halbach array, and passing non-magnetic bolts through the small through holes of the base and the positioning holes of the permanent magnet to fix the permanent magnet to the side wall of the base, and at the same time, consolidating the bottom of the permanent magnet to the bottom of the base. The present invention provides a curing process for a permanent magnetic suspension track unit combination structure, in which the permanent magnet array is more stably and reliably assembled in the base, meets the flatness of the permanent magnetic suspension track unit, and does not affect the magnetic field line distribution of the Halbach array.

Description

Technical Field

[0001] The present invention relates to the technical field of permanent magnet levitation rail transit, and particularly relates to a curing process for a combined structure of permanent magnet levitation track units. Background Art

[0002] Magnetic levitation technology is a technology that uses magnetic force to overcome gravity to suspend an object. Currently, there are mainly three types: electromagnetic levitation, superconducting diamagnetic levitation, and permanent magnet levitation.

[0003] Among them, permanent magnet levitation uses magnetized permanent magnets to provide a stable and strong magnetic field after special combination, and the repulsive force between the like-pole magnetic fields on the train frame to achieve the suspension of the train without mechanical contact, with the characteristics of no friction, low-carbon quietness, comfort and safety, relatively low cost, and low maintenance cost. Sintered neodymium iron boron permanent magnets are the material basis for realizing permanent magnet levitation technology, with characteristics such as high magnetic energy density, high demagnetization resistance ability, and high cost performance, and are known as the "magnetic king" in magnetic materials.

[0004] The core of permanent magnet levitation technology is to arrange and combine magnetized permanent magnets according to the Halbach array. The Halbach array is a magnet combination structure and is an approximately ideal structure in engineering. The goal is to generate the strongest magnetic field with the least amount of magnets. Its special significance lies in that the magnetic field on one side of the combined arrangement is stronger, while the magnetic field intensity on the other side is almost zero.

[0005] Before the permanent magnets are combined and arranged according to the Halbach array, they must first be magnetized to the saturation state through technology. The surface magnetic field intensity of each permanent magnet used in the field of permanent magnet levitation rail transit reaches several thousand gauss after saturation magnetization, and will generate a suction force of several hundred kilograms with ferromagnetic substances, and the assembly process is extremely dangerous. And after the permanent magnets are assembled by mechanical force through tooling equipment, due to the influence of processing accuracy, there are still problems such as some magnets being uneven or tilted on one side, which will affect the flatness of the overall permanent magnet levitation track unit and interfere with the operation of the maglev train. And if the processing accuracy is increased to an extremely high level to eliminate its influence, it will consume a great deal of cost, increase the overall cost of permanent magnet levitation rail transit, and is not conducive to the popularization and application of permanent magnet levitation track units.

[0006] Therefore, it is necessary to optimize the flatness of the permanent magnet levitation track unit and to maintain the overall flatness of the permanent magnet levitation track unit for a long time during the operation of the train. Summary of the Invention

[0007] The purpose of the present invention is to overcome the deficiencies of the above-mentioned prior art, and provide a curing process for a combined structure of permanent magnet levitation track units, so that the permanent magnet array combination is more stable and reliable in the base, meets the flatness of the permanent magnet levitation track unit, and does not affect the magnetic field line distribution of the Halbach array.

[0008] To achieve the above-mentioned purpose, the present invention provides a curing process for a permanent magnetic suspension track unit assembly structure, wherein the permanent magnetic suspension track unit comprises a permanent magnet and a non-magnetic conductive base, and comprises the following steps: (1) a positioning hole is opened on the side of the permanent magnet, and a plurality of small through holes are opened at corresponding positions on the side of the base; (2) the permanent magnet is assembled to the base in a Halbach array by using an assembly tool, and non-magnetic conductive bolts are passed through the small through holes of the base and the positioning holes of the permanent magnet to fix the permanent magnet to the side wall of the base, and at the same time, the bottom of the permanent magnet is fixed to the bottom of the base.

[0009] The permanent magnets in the technical solution are combined in a Halbach array in the permanent magnetic suspension track unit. The magnets influence each other and are prone to flipping, tilting and floating. Therefore, it is necessary to fix the permanent magnets in the base by setting a certain structure. When the surface of the magnet is damaged, it will affect the distribution of the magnetic lines of force. At the same time, if a hole is punched on the surface, there is no magnetic field at the location of the hole, and the magnetic lines of force around the hole will also scatter, causing the surface magnetism of the magnet to decrease. Therefore, in order to avoid the influence of the Halbach array magnetic lines of force, it is impossible to punch holes above the magnets to fix them. Only holes can be punched from the side of the magnets to fix the entire array of magnets. In theory, the gap between the through hole and the bolt should be smaller than the surface flatness tolerance range of the permanent magnetic suspension track unit. After the bolts fix the permanent magnet and the base, it still cannot meet the flatness requirements of the actual permanent magnetic suspension track unit. Therefore, it is also necessary to consolidate the bottom of the permanent magnet and the bottom of the base to meet the above requirements.

[0010] Preferably, in step (2), before the permanent magnet array is assembled, an adhesive material is firstly coated on the bottom of the permanent magnet, and a tight bond between the bottom of the permanent magnet and the base is achieved through the adhesive material. Secondly, after the permanent magnet suspension track unit is assembled, constant temperature curing is performed.

[0011] In order to achieve a fixed connection between the permanent magnet and the bottom of the base in this technical solution, it is necessary to select a suitable bonding method or bonding structure. Considering that the surface of the permanent magnet will be plated with a protective layer and the base material is a non-magnetic object such as aluminum alloy or non-magnetic stainless steel, welding is not possible, and only bonding materials can be selected to improve the surface flatness. In order to accelerate the curing of the bonding material, heating and constant temperature curing are performed after assembly is completed.

[0012] Preferably, the bonding material is glue, and the glue is applied on the permanent magnet that is prone to bulging, misalignment or tilting in step (2).

[0013] In combination with the above technical solution, glue is first applied to the permanent magnets that are prone to bulging, misalignment or tilting, without the need to apply glue to other permanent magnets, thereby improving work efficiency and not affecting the flatness requirements of the permanent magnetic suspension track unit.

[0014] Preferably, before bonding the permanent magnet to the base in step (2), the base and the assembly tooling are preheated in advance.

[0015] Combined with the above technical solution, curing is required when using glue bonding. To shorten the curing time, the base and the assembly tooling are preheated in advance to reduce the time for slowly heating up in the constant temperature room after assembly is completed.

[0016] Preferably, the assembly tooling is preheated to the temperature required to accelerate the curing of the glue by the heating module and continuously heated to maintain a constant temperature. The heating module includes a heating block, a heating tube, and a temperature control switch. The heating tube is provided inside the heating block, and the temperature control switch is provided on the surface of the heating block. The temperature control switch is connected in series in the circuit of the heating tube.

[0017] Combined with the above technical solution, the assembly tooling is preheated in advance as required, and the preheating and continuous heating to maintain a constant temperature are achieved through the heating module. The purpose of this is to enable the glue to start entering the curing stage during assembly, reduce the time for slowly heating up in the constant temperature room after assembly is completed. Moreover, the heating module is used to continuously heat and maintain a constant temperature during assembly, thereby ensuring the surface flatness of the permanent magnet levitation track unit.

[0018] Preferably, when the permanent magnet levitation track unit is cured at a constant temperature in step (2), at least one clamping mechanism is used to clamp and fix the permanent magnet levitation track unit. The clamping mechanism includes an upper clamping plate located above the permanent magnet, a lower clamping plate located below the permanent magnet, and a clamping bolt connecting the upper clamping plate and the lower clamping plate. The upper clamping plate prevents the permanent magnet from floating upward. The upper clamping plate, the lower clamping plate, and the bolt are all non-magnetic objects.

[0019] With this technical solution, after the permanent magnet is assembled, the clamping mechanism is used for curing at a constant temperature to ensure that the flatness of the permanent magnet levitation track unit during curing can be maintained within 0.1 mm, meeting the surface flatness requirements; on the other hand, the use of bolt connection provides a clamping force, and the flatness fixing effect can be controlled by adjusting the pre-tightening force. The number of fixtures can be changed according to the actual flatness, which is convenient to use and has an obvious adjustment effect.

[0020] Preferably, there are multiple clamping mechanisms, and each clamping mechanism is arranged in parallel along the length direction of the base.

[0021] With this technical solution, after the permanent magnet levitation track unit is assembled, the number of clamping mechanisms is selected according to the state of the permanent magnet levitation track unit, which is convenient to use and can effectively control the curing quality.

[0022] Preferably, the clamping mechanism further includes a clamping strip, the clamping strip is located between the permanent magnet and the upper clamping plate, the clamping strip prevents the permanent magnet from floating upward, and the clamping strip is a non-magnetic object.

[0023] The clamping mechanism composed of the upper clamping plate, the lower clamping plate and the bolts is independently clamped on the permanent magnet suspension track unit at a certain interval, which will cause some permanent magnets not to be clamped, affecting the glue curing effect. The clamping mechanism of this technical solution adds a clamping strip to connect the above-mentioned independently arranged clamping mechanisms, realizing all-round clamping, with good clamping effect and improving the glue curing effect; at the same time, the position of the clamping strip can be adjusted according to the flatness to control the pressing force, so as to improve the flatness after fastening.

[0024] Preferably, the base in step (2) is provided with at least one counterbore located between the two small through holes, and a dust cover is arranged above the base, and the dust cover is connected to the counterbore.

[0025] This technical solution uses the counterbore and bolts to fix the dust cover on the base. On the one hand, the fixation is simple. On the other hand, it protects the permanent magnet from contacting the outside world, affecting its service life, and can also prevent water, protecting the protective layer of the permanent magnet.

[0026] The beneficial effects of the present invention: The present invention uses glue to bond the permanent magnet suspension track unit, combines bolts to connect the permanent magnet and the side wall of the base, improves the bonding force received by a single permanent magnet, ensures that it will not float up, and uses the clamping mechanism to carry out constant temperature curing when the flatness of the permanent magnet suspension track unit is close to 0, improving the surface flatness of the permanent magnet suspension track unit; before assembling the permanent magnet suspension track unit, preheat the base, and use the heating module to preheat the assembly tooling and maintain a constant temperature for assembly. Therefore, the curing time of the permanent magnet suspension track unit in the constant temperature room can be shortened, and the curing effect is good.

[0027] The features and advantages of the present invention will be described in detail through embodiments in conjunction with the drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 This is the orientation direction of the permanent magnet and the direction of the magnetic field lines.

[0029] Figure 2 This is a schematic diagram of the force direction of the Halbach array of permanent magnets.

[0030] Figure 3 This is a schematic diagram of the floating state structure of the permanent magnet.

[0031] Figure 4 This is a schematic diagram of the structure of the permanent magnet suspension track unit.

[0032] Figure 5 This is Figure 4 the explosion structure diagram of

[0033] Figure 6 This is a schematic diagram of the structure of the clamping mechanism.

[0034] Figure 7 It is a schematic structural diagram of a heating module.

[0035] In the figure: 1 - permanent magnet, 2 - base, 11 - positioning hole, 21 - small through hole, 22 - counterbore, 23 - dust cover, 231 - connecting strip, 24 - bottom plate, 241 - fixing plate, 2411 - large through hole, 2412 - groove, 3 - clamping mechanism, 31 - upper clamping plate, 32 - lower clamping plate, 33 - clamping bolt, 34 - clamping strip, 4 - heating module, 41 - heating block, 42 - heating tube, 43 - temperature control switch, 10 - assembly tooling. Specific embodiments

[0036] To make the objectives, technical solutions and advantages of the present invention clearer and more understandable, the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. However, it should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the scope of the present invention. In addition, in the following description, the descriptions of well-known structures and technologies are omitted to avoid unnecessarily confusing the concepts of the present invention.

[0037] In a permanent magnet levitation track unit combination structure of this embodiment, the magnetized permanent magnets 1 are arranged in a Halbach array as Figure 1 shown. The solid lines and arrows are the magnetization orientation directions of the permanent magnets 1, the direction indicated by the arrows is the N pole, and the dotted lines are the magnetic field line directions.

[0038] Taking the arrangement of 5 magnetized permanent magnets 1 fixed in the accommodating cavity of the base 2 as an example, compared with the arrangement of 3 magnetized permanent magnets 1, the magnetic field intensity on its surface is stronger, the generated levitation force is greater, and the load capacity of the maglev train is improved.

[0039] When the permanent magnets 1 are combined in an array of permanent magnet levitation track units, the permanent magnets 1 affect each other, as Figure 2 shown as the force directions of each magnet. Therefore, the magnets in the 2nd and 4th columns will stick to the bottom of the fixed structure of the permanent magnet levitation track unit, while the magnets in the 1st, 3rd, and 5th columns will float upward, as Figure 3 shown,

[0040] Under the above background, the present invention proposes a curing process for a permanent magnet levitation track unit combination structure, including the following steps,

[0041] (1) Open positioning holes 11 on the side of the permanent magnet 1, and open a plurality of small through holes 21 at the relative positions on the side of the base 2,

[0042] (2) The assembly tooling 10 combines the permanent magnets 1 in a Halbach array on the base 2. Non-magnetic bolts pass through the small through-holes 21 in the base 2 and the through-holes in the permanent magnets 1 to fix the permanent magnets 1 to the side walls of the base 2. At the same time, the bottom of the permanent magnets 1 is tightly bonded to the bottom of the base 2 with glue, and the permanent magnetic suspension track unit is cured at a constant temperature while being clamped by the clamping mechanism 3 to meet the flatness requirements of the permanent magnetic suspension track unit.

[0043] Specifically, in the above step (1), when there is damage on the surface of the permanent magnet 1, it will affect the distribution of magnetic flux lines. If through-holes are drilled on the surface, there will be no magnetic field at the drilling positions, and the magnetic flux lines around the holes will also scatter, resulting in a decrease in the surface magnetic field of the magnet. Therefore, in order to avoid the influence on the magnetic flux lines of the Halbach array, it is impossible to drill and fix holes above the magnets in the second and fourth columns. So, the magnets of the whole column can only be drilled and fixed from the side of the permanent magnet 1. Theoretically, the clearance between the positioning holes 11 and the bolts should be less than the surface flatness tolerance range of the permanent magnetic suspension track unit. As Figure 4 and Figure 5 shown, positioning holes 11 are drilled on the side of the permanent magnet 1. Correspondingly, a plurality of small through-holes 21 are provided on the side wall of the base 2. The permanent magnet 1 is fixed to the base 2 of the permanent magnetic suspension track unit by long bolts passing through the positioning holes 11 and the small through-holes 21, ensuring that the permanent magnet 1 will not turn over, tilt, or float after assembly, and the magnetic field intensity on the surface will not be affected.

[0044] More specifically, the positioning holes 11 on the side of the permanent magnet 1 can be uniformly set at the central position in the height direction of the magnet, or different heights of positioning holes 11 can be set respectively according to the different degrees of turning over, tilting, and floating of the magnets after the Halbach array combination. After the assembly tooling 10 and the installation bolts, reverse compensation for the magnet offset is realized, thereby improving the flatness of the permanent magnetic suspension track unit, reducing the dependence on the adhesive strength and the bonding force between the surface protective layer of the magnet and the magnet matrix, being more stable and flat, and improving the durability.

[0045] More specifically, the base 2 of the present invention must be made of non-magnetic materials, such as aluminum alloy, non-magnetic stainless steel, etc., and have high strength, rigidity, and appropriate dimensions and tolerances. The appropriate dimensions and tolerances are to ensure that the size of the magnetized permanent magnets arranged in the Halbach array combination matches that of the base 2, and the appropriate thickness can prevent the permanent magnet suspension track unit from attracting other ferromagnetic substances due to a small amount of magnetic leakage on the back, and at the same time, the magnetic force between the magnetized permanent magnets 1 forms the overall external force after the combination of the magnetized permanent magnets 1, which may cause deformation or fracture of the base 2. Since the hardness of the permanent magnet 1 and the long bolts is relatively high, usually the HRC can reach 45-55, the high rigidity is to ensure that the base 2 will not be damaged or deformed due to assembly, enhancing the manufacturability of the permanent magnet suspension track unit and reducing the threshold of industrial production of the permanent magnet suspension track.

[0046] For another example Figure 4 and Figure 5 As shown, a plurality of counterbores 22 are also provided on the side wall of the base 2. The number of counterbores 22 is less than that of the small through holes 21, and each counterbore 22 is located between two small through holes 21 for installing and fixing the dust cover 23 to enclose and seal the permanent magnet 1. Corresponding numbers of connecting strips 231 are provided on both sides of the dust cover 23, and connecting holes corresponding to the counterbores 22 are provided on the connecting strips 231. The long bolts pass through the connecting strips 231 and the counterbores 22 to fix the dust cover 23 to the base 2.

[0047] The base 2 is also provided with a bottom plate 24. The bottom plate 24 is located below the accommodation cavity. Fixing plates 241 are provided on both sides of the bottom plate 24 in the width direction. A plurality of large through holes 2411 and a plurality of grooves 2412 are provided on the fixing plates 241. The number of large through holes 2411 is more than that of the grooves 2412. The large through holes 2411 are used for connecting and fixing the permanent magnet suspension track unit to the track steel beam. Similarly, the connection method of passing bolts through the large through holes 2411 is adopted. Since there are installation instabilities such as bolt loosening in the bolt connection method, a plurality of grooves 2412 are also provided. Specifically, the grooves 2412 are rectangular grooves. Steel blocks are placed and fixed in the rectangular grooves, and at the same time, the steel blocks are welded to the track steel beam. The double connection method increases the connection and fixing stability of the permanent magnet suspension track unit to the track steel beam.

[0048] Furthermore, certain surface finish should be ensured for each surface of the base 2, and a small deflection and flatness should be ensured for the whole. The surface finish of the outer surface is for better aesthetics, and the surface finish of the inner surface is to meet the requirements of the bonding strength when bonding with the magnetized permanent magnet 1, which should not be too small or too large; the small deflection and flatness are for the magnetized permanent magnet 1 to be smoothly assembled into the groove 2412 of the base 2.

[0049] Specifically, in the above step (2), after the permanent magnet 1 and the side wall of the base 2 are assembled, the magnets in the 1st, 3rd, and 5th columns will still float about 1.3 mm. However, the flatness requirement of the actual permanent magnet suspension track unit needs to be less than 0.5 mm. Therefore, it is also necessary to bond and fix the permanent magnets and the base that are prone to protrusion, dislocation, or tilting.

[0050] More specifically, since the surface of the permanent magnet 1 is coated with a protective layer, the material base 2 of the present invention is made of materials such as aluminum alloy and non-magnetic stainless steel, so welding is not possible. Only bonding materials such as glue can be selected to bond the permanent magnet 1 and the base 2 to improve the surface flatness of the permanent magnet suspension track unit, and it is cured at a constant temperature under the clamping and pressing state of the clamping mechanism 3 to ensure that the flatness of the permanent magnet suspension track unit can be maintained within 0.1 mm during curing. The glue used in this process needs to be specially formulated according to the characteristics of the permanent magnet 1 and the base 2, and the time and temperature of constant temperature curing are determined according to the characteristics of the actual glue used.

[0051] In the above, through the pre-pressing of the clamping mechanism 3, temporary fixation can be ensured before the adhesive strength reaches the maximum value, reducing the damage to the adhesive interface; the heating room during constant temperature curing can be a baking room, and the baking room can be a room with a brick-concrete structure or heated in a simple panel room built, so that the glue accelerates curing to reach the maximum adhesive strength of normal temperature curing. It can also further improve the adhesive strength due to the change of curing conditions (the increase of ambient temperature).

[0052] As Figure 6 shown, multiple clamping mechanisms 3 are provided, which can be 2, 3 or more. The specific number is set according to the length of the permanent magnet suspension track unit and the arrangement of the permanent magnets. Each clamping mechanism 3 is arranged in parallel along the length direction of the permanent magnet suspension track unit. Specifically, the clamping mechanism 3 includes an upper clamping plate 31, a lower clamping plate 32, a clamping bolt 33 connecting the upper clamping plate 31 and the lower clamping plate 32, and a clamping strip 34. The upper clamping plate 31 is located above the permanent magnet 1, the clamping strip 34 is located between the permanent magnet 1 and the upper clamping plate 31, the clamping strip 34 is arranged along the length direction of the permanent magnet 1, the lower clamping plate 32 is located below the base 2 and is arranged corresponding to the upper clamping plate 31. The clamping bolts 33 are located on both sides of the length direction of the base 2 to connect the upper clamping plate 31 and the lower clamping plate 32. By adjusting the clamping bolts 33 to provide a clamping force, the upper clamping plate 31, the clamping strip 34 and the lower clamping plate 32 are fixed and tightened. By adjusting the pre-tightening force, the flatness fixing effect is controlled, and the pre-pressing function for bonding the permanent magnet 1 is achieved. The clamping strip 34 can adjust its position according to the flatness to control the clamping force, so as to improve the flatness after tightening. The clamping mechanism 3 of the present invention can change the number of the upper clamping plate 31, the lower clamping plate 32 and the clamping bolts 33 according to the actual flatness, which is convenient to use and has an obvious adjustment effect.

[0053] In order to shorten the curing time, before assembling the permanent magnet levitation track unit, the aluminum alloy base 2 of the permanent magnet levitation track unit also needs to be preheated in a constant temperature curing room in advance, and the assembly tooling 10 or equipment used for assembly also needs to be preheated to reach a suitable temperature and continuously heated to maintain a constant temperature. The purpose of doing this is to enable the glue to start entering the curing stage during assembly, reducing the time for slow temperature rise in the constant temperature room after assembly is completed, thereby ensuring the surface flatness of the permanent magnet levitation track unit.

[0054] As Figure 7 shown, the preheating of the assembly tooling 10 is carried out by setting a heating module 4 on the lower side of the assembly tooling 10. Specifically, the heating module 4 includes a heating block 41, a heating pipe 42, and a temperature control switch 43. The heating pipe 42 is arranged inside the heating block 41, and the temperature control switch 43 is arranged on the surface of the heating block 41. The temperature control switch 43 is connected in series in the circuit of the heating pipe 42.

[0055] Heating method: Before assembly, the heating pipe 42 is powered on for heating. The temperature control switch 43 is connected in series in the circuit of the heating pipe 42. When the temperature of the aluminum alloy exceeds the preset maximum temperature, the temperature control switch 43 can be disconnected. When the temperature is lower than the preset minimum temperature, the temperature control switch 43 can be normally closed. Therefore, the temperature of the aluminum alloy will always be controlled within a suitable temperature range, and the heat energy will be transferred to the assembly tooling 10 to achieve temperature control during the assembly of the permanent magnet levitation track unit.

[0056] In the present invention, the material selected for the bottom of the base 2 should also have good thermal conductivity, which is convenient for saving time and improving efficiency when heating and curing the glue.

[0057] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, or improvements made within the spirit and principles of the present invention shall be included within the protection scope of the present invention.

Claims

1. A curing process for a combined structure of permanent magnet levitation track units, the permanent magnet levitation track unit comprising a permanent magnet and a non-magnetic base, characterized in that: The following steps are included: (1) A positioning hole is opened on the side of the permanent magnet, and a plurality of small through holes are opened at corresponding positions on the side of the base; (2) Using an assembly tool, the permanent magnet is assembled on the base in a Halbach array. Non-magnetic bolts are passed through the small through holes of the base and the positioning holes of the permanent magnet to fix the permanent magnet to the side wall of the base and to fix the bottom of the permanent magnet to the bottom of the base. In the step (2), before the permanent magnet array is assembled, an adhesive material is firstly coated on the bottom of the permanent magnet, and the bottom of the permanent magnet is tightly bonded to the base through the adhesive material. Then, the permanent magnet suspension track unit is assembled and then cured at a constant temperature. When the permanent magnet suspension track unit is cured at a constant temperature in the step (2), at least one clamping mechanism is used to clamp and fix the permanent magnet suspension track unit. The clamping mechanism includes an upper clamping plate located above the permanent magnet, a lower clamping plate located below the permanent magnet, and a clamping bolt connecting the upper clamping plate and the lower clamping plate. The upper clamping plate prevents the permanent magnet from floating up. The upper clamping plate, the lower clamping plate and the bolt are all non-magnetic conductive objects. There are multiple clamping mechanisms, and each of the clamping mechanisms is arranged in parallel along the length direction of the base. The clamping mechanism also includes a clamping bar, which is located between the permanent magnet and the upper clamping plate. The clamping bar prevents the permanent magnet from floating up. The clamping bar is a non-magnetic conductive object.

2. The curing process of the permanent magnet levitation track unit combined structure according to claim 1, characterized in that: The bonding material is glue, and the glue is applied on the permanent magnet that is prone to bulging, misalignment or tilting in the step (2).

3. The curing process of the permanent magnet levitation track unit combined structure according to claim 1, characterized in that: In the step (2), before the permanent magnet is bonded to the base, the base and the assembly tool are first preheated.

4. The curing process of the permanent magnet levitation track unit combined structure according to claim 3, characterized in that: The assembly tool is preheated to the temperature required to accelerate the curing of the glue through a heating module, and is continuously heated to maintain a constant temperature. The heating module includes a heating block, a heating tube and a temperature control switch. A heating tube is provided inside the heating block, and a temperature control switch is provided on the surface of the heating block. The temperature control switch is connected in series in the circuit of the heating tube.

5. The curing process of the permanent magnet levitation track unit combination structure according to any one of claims 1-4, characterized in that: The base in step (2) is provided with at least one countersunk hole located between the two small through holes, and a dust cover is provided above the base, and the dust cover is connected to the countersunk hole.

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