A method for levelling a linear motor magnetic track assembly
By employing a leveling method that combines differentiated zonal pressure application and limit step control, the problems of magnetic track warping and thickness control were solved, enabling efficient and low-cost magnetic track assembly and improving motor performance and production efficiency.
Patent Information
- Application Number
- CN202611334742.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2026-08-31
- Publication Date
- 2026-11-03
AI Technical Summary
Existing technologies are difficult to effectively correct the warping deformation of linear motor magnetic tracks after bonding and molding, and to achieve precise control of the assembly thickness. They also have the problems of high cost and long-term tooling occupation.
The leveling method employs differentiated zone pressure application, which applies pressure to both ends and the middle of the magnetic track using a clamping device. The clamping force at both ends is greater than that in the middle. Combined with the thickness control using limiting steps, leveling can be completed by holding the pressure for 30-60 minutes at room temperature, thus avoiding high-temperature demagnetization and prolonged pressure holding.
It achieves precise correction of the magnetic track flatness to ≤0.05mm, improves the uniformity of the motor air gap, reduces vibration and abnormal noise, shortens tooling turnaround time, reduces equipment investment and energy consumption, and lowers the overall manufacturing cost.
Smart Images
Figure CN123034682A_ABST
Abstract
Description
Technical Field
[0001] This invention relates to the field of linear motor manufacturing equipment technology, and specifically to a leveling method for assembling magnetic tracks for linear motors. Background Technology
[0002] In the field of linear motor manufacturing, long, thin-walled magnetic tracks are typically manufactured using an adhesive bonding process, which generally involves two bonding steps: the first is bonding the magnetic yoke to the permanent magnet, and the second is bonding the magnetic cover to the permanent magnet. However, due to factors such as the internal stress of the magnetic yoke substrate, the shrinkage stress of the adhesive during curing, and the material expansion and contraction caused by temperature changes, the semi-finished magnetic track after the first bonding step is highly prone to warping deformation. Specifically, the ends warp upwards, the middle section arches upwards, and the overall flatness deviation is only 0.1-0.2mm. When this magnetic track is assembled into a linear motor, excessive flatness deviation will lead to uneven air gap in the motor, which in turn will cause excessive vibration and noise during high-speed operation, seriously affecting the motor performance.
[0003] To address the aforementioned warping and deformation issues, existing technologies primarily employ uniform pressure application across the entire surface for pressing and correction. For instance, some solutions use a flat plate pressing device to apply pressure to the entire magnetic track. However, since the deformation of the long magnetic track is mainly concentrated at both ends, the uniform pressure application across the entire surface results in insufficient force at the ends, limiting the correction effect. Other solutions use multi-cylinder segmented pressing equipment, but such equipment is complex in structure, expensive to manufacture, and difficult to coordinate the pressure between cylinders. Furthermore, in terms of thickness control, existing technologies often use scattered, equal-height pads for thickness control. These pads are prone to shifting during pressing, leading to poor consistency in the adhesive layer thickness. In addition, existing processes typically require a full 12 hours of curing under pressure before demolding, resulting in significant tooling investment and long site occupancy. Using heat curing can cause demagnetization of the permanent magnets, permanently reducing motor performance. If cold correction is performed after the workpiece is fully cured, it easily leads to magnet chipping or delamination, resulting in a high overall defect rate.
[0004] Therefore, how to effectively correct the warping deformation caused by the previous process during the magnetic track assembly process, while achieving precise control of the assembly thickness and shortening the tooling time, is a technical problem that urgently needs to be solved in the field of linear motor magnetic track manufacturing. Summary of the Invention
[0005] This invention provides a leveling method for assembling magnetic rails of a linear motor, which achieves precise control of the assembly thickness, eliminates the need for heating and prolonged pressure holding, and caters to both small-batch trial production and mass production needs.
[0006] To achieve the above-mentioned objective, this invention provides a leveling method for assembling the magnetic track of a linear motor, comprising the following steps: A semi-finished magnetic track is obtained after one-time bonding and molding, wherein the semi-finished magnetic track is formed by bonding and curing a magnetic yoke and a permanent magnet. An adhesive is applied to the surface of the permanent magnet and the magnet cover is then fastened onto the permanent magnet. The semi-finished magnetic rail with the magnetic cover fastened on it is placed on the reference surface of the leveling fixture. Pressure is applied to at least the left, middle, and right regions along the length of the semi-finished magnetic track by a clamping device, wherein the clamping force in the left and right regions is greater than or equal to the clamping force in the middle region, in order to correct the warping deformation of the semi-finished magnetic track; wherein the leveling fixture is provided with a thickness limiting structure that restricts the downward stroke of the clamping device. Maintain the pressure of the clamping device and release the pressure after holding it at room temperature for 30-60 minutes.
[0007] Preferably, the clamping device includes a base and a pressure plate, and the lower surface of the pressure plate is provided with pressure points corresponding to the left end region, middle region and right end region of the semi-finished magnetic track.
[0008] Preferably, the clamping device includes a left end pressure plate, a middle pressure plate, and a right end pressure plate. The left end pressure plate is correspondingly arranged with the left end region, the middle pressure plate is correspondingly arranged with the middle region, and the right end pressure plate is correspondingly arranged with the right end region. When applying pressure, the left end pressure plate and the right end pressure plate are activated first, and then the middle pressure plate is activated.
[0009] Preferably, the base is provided with a workpiece groove, and a thickness limiting structure is formed on both sides of the workpiece groove. The thickness limiting structure is a limiting step, and the pressure plate presses down until it stops at the limiting step, so as to limit the final thickness of the semi-finished magnetic rail.
[0010] Preferably, a protrusion is formed in the middle region of the limiting step, the protrusion protrudes towards the workpiece groove, and the middle pressure plate presses down to the protrusion and stops; the left end pressure plate and the right end pressure plate press down into the workpiece groove; The left and right end pressure plates are provided with U-shaped pressure grooves that are adapted to the shape of the end of the semi-finished magnetic rail. The periphery of the U-shaped pressure groove has pressure plate steps. During operation, the semi-finished magnetic rail is located in the U-shaped pressure groove, and the pressure plate steps abut against the reference surface of the leveling fixture. The left and right end pressure plates are also provided with observation holes, and during operation, the end of the semi-finished magnetic rail is exposed through the observation holes.
[0011] Preferably, the clamping device further includes a power device, and the pressure plate is connected to the power output shaft of the power device; a fixing plate is also provided on the pressure plate, the fixing plate extends along the length direction of the pressure plate, and multiple guide posts are provided at both ends of the fixing plate. The guide posts are fixed between the base and the fixing plate, and the guide posts pass through the pressure plate. The power device drives the pressure plate to move up and down along the guide posts.
[0012] Preferably, the base is provided with limiting grooves, and multiple limiting grooves are provided, which are distributed in the left, middle and right end regions of the base; the pressure plate is provided with limiting protrusions that fit with the limiting grooves; the thickness limiting structure includes the limiting grooves and the limiting protrusions, and the pressing device stops pressing down when the limiting protrusions fit with the limiting grooves, so as to limit the final thickness of the semi-finished magnetic rail.
[0013] Preferably, the leveling fixture has limiting structures at both ends along its length, so that the two ends of the semi-finished magnetic rail abut against the limiting structures to achieve axial positioning. During the pressing process of the clamping device, the limiting structures also serve as supports for the pressure-bearing areas at both ends of the semi-finished magnetic rail, thereby enhancing the correction of warping deformation at both ends of the semi-finished magnetic rail.
[0014] Preferably, the semi-finished magnetic track has a long, thin-walled structure, and the warping deformation is characterized by both ends curving upwards and the middle section arching upwards. The flatness of the corrected semi-finished magnetic track is ≤0.05mm.
[0015] Preferably, the ambient temperature is 20-28℃. After holding the pressure at ambient temperature for 40-50 minutes, the adhesive solidifies. When the workpiece shows no springback, the pressure is released and the workpiece is removed.
[0016] Compared with the prior art, the present invention has the following beneficial effects: This invention applies pressure to both ends and the middle of a semi-finished magnetic track using a clamping device, with the clamping force at both ends being greater than or equal to that at the middle. This differentiated, zoned pressure application addresses the specific warping shape of long, thin-walled magnetic tracks—characterized by "upturned ends and arched middle"—effectively solving the problem of insufficient force at both ends under traditional uniform pressure application methods. After processing, the flatness of the magnetic track is stably corrected from 0.1-0.2mm to ≤0.05mm, significantly improving the uniformity of the linear motor's air gap and substantially reducing vibration and abnormal noise. Pressure can be released and demolded after holding pressure for 30-60 minutes at room temperature, eliminating the need for the full curing and pressure holding of up to 12 hours in traditional processes, thus improving tooling turnover efficiency by more than 4 times; the entire process is carried out at room temperature without heating, completely eliminating the risk of demagnetization of permanent magnet steel at high temperatures and ensuring the long-term reliability of the motor. By rigidly limiting the downward stroke with a limiting step, the step height is equal to the total thickness of the finished magnetic track, achieving precise control of the assembly thickness, with the thickness tolerance controlled within ±0.05mm; by utilizing the curing window period of the secondary bonding of the magnetic steel cover, the warping deformation caused by the previous process is corrected simultaneously, eliminating the need to wait for complete curing before cold pressing rework, avoiding problems such as magnetic steel chipping and delamination, and significantly reducing the overall defect rate; The same process logic can be adapted to two types of clamping fixtures: multi-point quick clamps (for small-batch flexible production) and single-cylinder integrated clamping plates (for large-batch automated production lines). Production line switching is flexible, taking into account both R&D and mass production needs. No heating equipment such as constant temperature ovens is required, reducing energy consumption and equipment investment, and lowering the overall manufacturing cost by more than 20%. Attached Figure Description
[0017] The accompanying drawings are provided to further illustrate the invention and form part of the specification. They are used in conjunction with embodiments of the invention to explain the invention and do not constitute a limitation thereof. In the drawings: Figure 1 This is a flowchart of the leveling method for assembling the magnetic track of the linear motor according to the present invention; Figure 2 This is an overall structural diagram of the manual device for the semi-finished magnetic track according to an embodiment of the present invention; Figure 3 This is an overall structural diagram of the manually tightened leveling fixture according to an embodiment of the present invention; Figure 4 for Figure 3 Overall structural diagram after removing the middle pressure plate and the right end pressure plate; Figure 5 for Figure 4 The overall structure diagram after further removing some clamps and semi-finished magnetic rails; Figure 6 An overall structural diagram of the left end pressure plate of the present invention; Figure 7 and Figure 8 This is an overall structural diagram of the automatic clamping leveling fixture according to an embodiment of the present invention.
[0018] Figure label: 1. Base; 11. Reference surface; 12. Limiting structure; 13. Limiting step; 14. Workpiece groove; 15. Protrusion; 16. Limiting groove; 2. Clamping device; 21. Left end clamping plate; 22. Middle clamping plate; 23. Right end clamping plate; 211. U-shaped clamping groove; 212. Clamping plate step; 213. Observation hole; 3. Pressure plate; 31. Pressure point; 32. Limiting protrusion; 4. Semi-finished magnetic track; 41. Magnetic yoke; 42. Permanent magnet; 43. Magnet cover; 5. Power unit; 51. Power take-off shaft; 6. Fixing plate; 7. Guide pillars; 8. Pliers. Detailed Implementation
[0019] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the present invention will be briefly introduced below in conjunction with the accompanying drawings and descriptions of the embodiments or the prior art. Obviously, the following description of the structure of the accompanying drawings is only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort. It should be noted that the description of these embodiments is for the purpose of helping to understand the present invention, but does not constitute a limitation of the present invention.
[0020] It should be understood that the terms “comprising” and “having”, and any variations thereof, are intended to cover non-exclusive inclusion, for example, a process, method, system, product, or device that includes a series of steps or units is not necessarily limited to those steps or units that are explicitly listed, but may include other steps or units that are not explicitly listed or that are inherent to such process, method, product, or device.
[0021] refer to Figure 1-8 The leveling method for assembling linear motor magnetic tracks of the present invention is achieved through a leveling fixture. The leveling fixture includes a base 1, which has a reference surface 11 for placing the workpiece. This reference surface 11 is precision machined to ensure its flatness. Limiting structures 12 are provided at both ends along the length direction of the base 1, and the limiting structures 12 are used to axially position the workpiece placed on the reference surface 11. A limiting step 13 is also provided on the base 1, the height of which is equal to the total thickness of the finished magnetic track, used to limit the downward stroke of the clamping device. The leveling fixture also has a thickness limiting structure to limit the downward stroke of the clamping device, thereby controlling the thickness of the semi-finished magnetic track.
[0022] refer to Figure 1 The leveling method includes the following steps: First, a semi-finished magnetic track 4 is obtained after one bonding and molding process. This semi-finished magnetic track 4 is formed by bonding and curing a magnetic yoke 41 and a permanent magnet 42 through a first bonding process. Due to factors such as the internal stress of the magnetic yoke 41 substrate, the shrinkage stress of the adhesive during curing, and the expansion and contraction of the material caused by temperature changes, the semi-finished product is prone to the problem that the two ends of the magnetic track 4 will warp upwards, and the middle section will correspondingly arch upwards.
[0023] Then, an adhesive is applied to the surface of the permanent magnet 42, and the magnet cover 43 is fastened onto the permanent magnet 42 to complete the pre-installation of the magnet cover 43.
[0024] Next, the semi-finished magnetic rail 4 with the magnetic cover 43 fastened is placed on the reference surface 11 of the leveling fixture. During placement, the two ends of the semi-finished magnetic rail 4 are made to abut against the limiting structures 12 at both ends of the leveling fixture. The limiting structures 12 apply axial constraints to the semi-finished magnetic rail 4 so that it is automatically centered and positioned, ensuring that the magnetic cover 43 is accurately aligned with the body of the semi-finished magnetic rail 4 in the length direction.
[0025] Subsequently, pressure is applied to the left, middle, and right ends of the semi-finished magnetic track 4 along its length using a clamping device. The clamping force in the left and right ends is greater than or equal to that in the middle end. Since the warping of the semi-finished magnetic track 4 manifests as upward curling at both ends and an upward arch in the middle section, the left and right ends require greater clamping force to overcome the upward rebound tendency at the ends, while the middle section is compacted with appropriate clamping force, thereby correcting the overall warping deformation of the semi-finished magnetic track 4.
[0026] Finally, maintain the pressure of the clamping device and hold the pressure at room temperature for 30-60 minutes before releasing the pressure. During the pressure holding process, the adhesive gradually cures under continuous pressure. When it reaches the initial solidification state, the workpiece shape is set and there is no springback, at which point the pressure can be released and the workpiece demolded. After pressure release, the workpiece is transferred to a material rack and allowed to continue to cure completely under natural conditions.
[0027] refer to Figure 2-6 Example 1: Manual clamping method This embodiment provides a leveling method using manual clamping, which is suitable for new product prototype testing and small-batch production scenarios.
[0028] The clamping device includes a left-end pressure plate 21, a middle pressure plate 22, and a right-end pressure plate 23. The left-end pressure plate 21 is located at the left end of the base 1 along its length, corresponding vertically to the left end of the semi-finished magnetic track 4; the middle pressure plate 22 is located at the middle of the base 1 along its length, corresponding vertically to the middle of the semi-finished magnetic track 4; and the right-end pressure plate 23 is located at the right end of the base 1 along its length, corresponding vertically to the right end of the semi-finished magnetic track 4. Each pressure plate operates independently without interference. A quick-clamping clamp 8 is provided on the base to apply pressure to the pressure plates.
[0029] A workpiece groove 14 is provided on the base 1 of the leveling fixture, extending along the length of the base 1. Thickness-limiting structures, specifically limiting steps 13, are formed on both sides of the workpiece groove 14. The upper surface of the limiting steps 13 is lower than the reference surface 11 of the base 1. The height of the limiting steps 13 is equal to the total thickness of the finished magnetic track. A protrusion 15 is formed in the middle region of the limiting steps 13, protruding towards the workpiece groove 14. The upper surface of the protrusion 15 is at the same height as the upper surface of the limiting steps 13. The position and length of the protrusion 15 are adapted to the middle pressure plate 22. The two sides of the pressure plate press against the protrusion 15 to limit the downward pressure of the middle pressure plate 22, thereby controlling the thickness of the middle part of the semi-finished magnetic track 4. The left and right pressure plates 21 and 23 are provided with U-shaped pressure grooves 211 that conform to the shape of the end of the semi-finished magnetic rail 4. A pressure plate step 212 is formed around the periphery of the U-shaped pressure groove 211. During operation, the semi-finished magnetic rail 4 is located within the U-shaped pressure groove 211, and the pressure plate step 212 abuts against the reference surface 11 of the leveling fixture. The left and right pressure plates 21 and 23 are also provided with observation holes 213. During operation, the end of the semi-finished magnetic rail 4 protrudes through the observation holes 213, allowing the operator to confirm the position of the end of the semi-finished magnetic rail 4 within the U-shaped pressure groove 211, preventing interference or misalignment between the end of the semi-finished magnetic rail 4 and the pressure plate. When the pressure plate step 212 abuts against the reference surface 11, the downward stroke of the left and right pressure plates 21 and 23 is limited. The thickness of the pressure plate step 212 and the protrusion 15 is the same, and both together limit the final thickness of the semi-finished magnetic rail 4, ensuring a consistent thickness. The U-shaped pressure groove 211 is also used to ensure the degree of left-right and front-back offset of the semi-finished magnetic rail 4, so that the offset is controlled within the qualified range.
[0030] During pressure application, the operator first activates the left and right end pressure plates 21 and 23 downwards, prioritizing the pressure on the left and right ends to correct any upward warping deformation. The left and right end pressure plates 21 and 23 are pressed down into the workpiece groove 14, which provides space for the end pressure plates to press down. Then, the middle pressure plate 22 is activated downwards to compact the arched section in the middle. The pressure of the left and right end pressure plates 21 and 23 is greater than that of the middle pressure plate 22, creating differentiated pressure zones. The middle pressure plate 22 is pressed down until it contacts the protrusion 15, at which point it stops. The protrusion 15 forms a rigid stop on the middle pressure plate 22, preventing further downward movement. Since the height of the limiting step 13 is equal to the total thickness of the finished magnetic track, the workpiece thickness corresponding to the stopping position of the middle pressure plate 22 is the required thickness of the finished product, thus precisely controlling the overall thickness of the magnetic track assembly.
[0031] Maintain pressure on the left end pressure plate 21, the middle pressure plate 22, and the right end pressure plate 23, and hold the pressure for 30-60 minutes at room temperature in the workshop. During the pressure holding process, the adhesive gradually cures under continuous pressure. When the adhesive reaches the initial solidification state, the workpiece shape is set, and there is no springback, release each pressure plate in the order of first the middle and then the two ends, and remove the workpiece. Transfer the removed workpiece to the material rack and allow it to continue to cure completely under natural conditions.
[0032] refer to Figure 7 and Figure 8 Example 2: Automatic clamping method This embodiment provides a leveling method with automatic clamping, which is suitable for mass automated production line scenarios.
[0033] The clamping device includes a base 1, a pressure plate 3, a power unit 5, a fixing plate 6, and multiple guide posts 7. The pressure plate 3 is an integral structure extending along the length of the base 1. The lower surface of the pressure plate 3 has pressure points 31 corresponding to the left, middle, and right ends of the semi-finished magnetic track 4, with each pressure point 31 corresponding to one of the three areas of the semi-finished magnetic track 4. The pressure plate 3 is connected to the power output shaft 51 of the power unit 5, which drives its up-and-down movement. The fixing plate 6 extends along the length of the pressure plate 3 and is fixed above the base 1. Multiple guide posts 7 are provided at both ends of the fixing plate 6, fixed between the base 1 and the fixing plate 6, and passing through the pressure plate 3. The power unit 5 drives the pressure plate 3 to move up and down along the guide posts 7. The guide posts 7 constrain the movement of the pressure plate 3, ensuring that the pressure plate 3 remains horizontal during downward and upward movements, thus allowing each pressure point 31 to simultaneously contact the workpiece surface. The base 1 is provided with multiple limiting grooves 16, which are distributed in the left, middle, and right end regions of the base 1. The pressure plate 3 is provided with limiting protrusions 32 that mate with the limiting grooves 16. The thickness limiting structure includes the limiting grooves 16 and the limiting protrusions 32. The pressure plate 3 of the pressing device stops pressing down when the limiting protrusions 32 mate with the limiting grooves 16, thereby limiting the final thickness of the semi-finished magnetic track 4.
[0034] The semi-finished magnetic rail 4, with the magnetic cover 43 fastened to it, is placed on the reference surface 11 of the leveling fixture. Limiting structures 12 are provided at both ends of the leveling fixture along its length, allowing the ends of the semi-finished magnetic rail 4 to abut against the limiting structures 12 for axial positioning. During the subsequent pressing process, the limiting structures 12 also serve as supports for the pressure-bearing areas at both ends of the semi-finished magnetic rail 4, providing reaction force support when the ends are subjected to pressing force, thereby enhancing the correction effect on warping deformation at both ends of the semi-finished magnetic rail 4.
[0035] The power unit 5 is activated, and it drives the pressure plate 3 to move downward along the guide column 7 via the power output shaft 51. During the downward movement of the pressure plate 3, the pressure points 31 on its lower surface simultaneously apply pressure to the left, middle, and right ends of the semi-finished magnetic track 4. The larger clamping force in the left and right ends specifically corrects the upward warping deformation at both ends, while the clamping force in the middle section is used to compact the arched portion, thereby correcting the overall warping deformation of the semi-finished magnetic track 4. When the pressure plate 3 is pressed down until the limiting protrusion 32 is fully engaged with the limiting groove 16, the clamping device automatically stops moving downward. At this point, the engagement of the limiting protrusion 32 and the limiting groove 16 forms a rigid stop, preventing the pressure plate 3 from continuing to move downward, and limiting the final thickness of the semi-finished magnetic track 4.
[0036] Maintain the pressure of power unit 5 for 30-60 minutes at room temperature in the workshop. During the pressure holding process, the adhesive gradually cures under continuous pressure. When the adhesive reaches the initial solidification state, the workpiece shape is set and there is no springback, power unit 5 drives pressure plate 3 to rise and reset along guide column 7, and the robot or conveyor automatically removes the workpiece. The removed workpiece is then transferred to the material rack and allowed to continue to cure completely under natural conditions.
[0037] In the above embodiments, the pressure holding temperature is the workshop ambient temperature, typically 20-28℃. Under this temperature condition, the curing speed of the adhesive is moderate, ensuring that the adhesive reaches the initial solidification state within the pressure holding time without causing demagnetization of the permanent magnet 42 due to excessive temperature.
[0038] After being processed by this method, the flatness of the semi-finished magnetic track 4 is stably corrected from 0.1-0.2mm to ≤0.05mm, the thickness tolerance is controlled within ±0.05mm, the uniformity of the air gap of the linear motor is greatly improved, and vibration and abnormal noise are significantly reduced.
[0039] In the above embodiments, the power unit 5 can be a pneumatic cylinder, or a servo electric cylinder or hydraulic cylinder, all of which can achieve smooth driving of the pressure plate 3. The holding time can be adjusted within the range of 30-60 minutes according to the initial curing curve of the selected adhesive. Embodiment 1: The manual clamping method uses quick clamps to apply pressure. The number of quick clamps can be increased or decreased according to the length of the magnetic track, and is not limited to the left, middle, and right positions. Multiple clamps can be set in each area. The reference surface of the limiting step 13 can be replaced by materials such as tempered steel plate.
[0040] The above embodiments are only used to illustrate the technical solutions of the present invention, and are not intended to limit it. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention, and they should all be covered within the scope of the claims and specification of the present invention.
Claims
1. A leveling method for assembling magnetic tracks of a linear motor, characterized in that, Includes the following steps: A semi-finished magnetic track is obtained after one-time bonding and molding, wherein the semi-finished magnetic track is formed by bonding and curing a magnetic yoke and a permanent magnet. An adhesive is applied to the surface of the permanent magnet and the magnet cover is then fastened onto the permanent magnet. The semi-finished magnetic rail with the magnetic cover fastened on it is placed on the reference surface of the leveling fixture. Pressure is applied to at least the left, middle, and right regions along the length of the semi-finished magnetic track by a clamping device, wherein the clamping force in the left and right regions is greater than or equal to the clamping force in the middle region, in order to correct the warping deformation of the semi-finished magnetic track; wherein the leveling fixture is provided with a thickness limiting structure that restricts the downward stroke of the clamping device. Maintain the pressure of the clamping device and release the pressure after holding it at room temperature for 30-60 minutes.
2. The leveling method for assembling the magnetic track of a linear motor as described in claim 1, characterized in that, The clamping device includes a base and a pressure plate. The lower surface of the pressure plate is provided with pressure points corresponding to the left, middle and right end regions of the semi-finished magnetic track.
3. The leveling method for assembling the magnetic track of a linear motor as described in claim 2, characterized in that, The clamping device includes a left end pressure plate, a middle pressure plate, and a right end pressure plate. The left end pressure plate is correspondingly arranged with the left end area, the middle pressure plate is correspondingly arranged with the middle area, and the right end pressure plate is correspondingly arranged with the right end area. When applying pressure, the left end pressure plate and the right end pressure plate are activated first, and then the middle pressure plate is activated.
4. The leveling method for assembling the magnetic track of a linear motor as described in claim 3, characterized in that, The base is provided with a workpiece groove, and a thickness limiting structure is formed on both sides of the workpiece groove. The thickness limiting structure is a limiting step. The pressure plate presses down until it stops at the limiting step, so as to limit the final thickness of the semi-finished magnetic rail.
5. The leveling method for assembling the magnetic track of a linear motor as described in claim 4, characterized in that, A protrusion is formed in the middle region of the limiting step, and the protrusion protrudes towards the workpiece groove. The middle pressure plate applies downward pressure to the protrusion and stops; the left and right pressure plates press down into the workpiece groove. The left and right end pressure plates are provided with U-shaped pressure grooves that are adapted to the shape of the end of the semi-finished magnetic rail. The periphery of the U-shaped pressure groove has pressure plate steps. During operation, the semi-finished magnetic rail is located in the U-shaped pressure groove, and the pressure plate steps abut against the reference surface of the leveling fixture. The left and right end pressure plates are also provided with observation holes, and during operation, the end of the semi-finished magnetic rail is exposed through the observation holes.
6. The leveling method for assembling the magnetic track of a linear motor as described in claim 2, characterized in that, The clamping device also includes a power unit, and the pressure plate is connected to the power output shaft of the power unit; a fixing plate is also provided on the pressure plate, the fixing plate extends along the length of the pressure plate, and multiple guide posts are provided at both ends of the fixing plate. The guide posts are fixed between the base and the fixing plate, and the guide posts pass through the pressure plate. The power unit drives the pressure plate to move up and down along the guide posts.
7. The leveling method for assembling the magnetic track of a linear motor as described in claim 6, characterized in that, The base is provided with limiting grooves, and multiple limiting grooves are provided, which are distributed in the left, middle and right end regions of the base; the pressure plate is provided with limiting protrusions that fit with the limiting grooves; the thickness limiting structure includes the limiting grooves and the limiting protrusions, and the pressing device stops pressing down when the limiting protrusions fit with the limiting grooves, so as to limit the final thickness of the semi-finished magnetic rail.
8. The leveling method for assembling the magnetic track of a linear motor as described in claim 1, characterized in that, The leveling fixture has limiting structures at both ends along its length, so that the two ends of the semi-finished magnetic rail abut against the limiting structures to achieve axial positioning. During the pressing process of the clamping device, the limiting structures also serve as supports for the pressure-bearing areas at both ends of the semi-finished magnetic rail, thereby enhancing the correction of warping deformation at both ends of the semi-finished magnetic rail.
9. The leveling method for assembling the magnetic track of a linear motor as described in claim 1, characterized in that, The semi-finished magnetic track has a long, thin-walled structure. The warping deformation is characterized by both ends curving upwards and the middle section arching upwards. The flatness of the corrected semi-finished magnetic track is ≤0.05mm.
10. The leveling method for assembling the magnetic track of a linear motor according to claim 1, characterized in that, The ambient temperature is 20-28℃. After holding the pressure at ambient temperature for 40-50 minutes, the adhesive solidifies. When the workpiece shows no springback, the pressure is released and the workpiece is removed.