A magnetic repulsion-resistant magnet fitting pressure maintaining mechanism and pressure maintaining method

Abstract

The application discloses a magnet repulsion-resistant magnet fitting pressure maintaining mechanism and pressure maintaining method, and relates to the technical field of magnet assembly. The pressure maintaining mechanism comprises a fixed block, a pressure maintaining cylinder mounted on the fixed block, and a U-shaped pressure maintaining block connected with the piston end of the pressure maintaining cylinder through a pressure maintaining block connecting plate. The U-shaped pressure maintaining block has an overall side view L-shaped structure and an overall top view U-shaped structure. When the pressure maintaining cylinder piston rod is retracted, the U-shaped pressure maintaining block is pulled to move horizontally along the magnet pushing direction to the corresponding position of the guide groove through the pressure maintaining block connecting plate. The upper part of the U-shaped pressure maintaining block passes above the magnet top surface to form a top pressing surface, and the inner side vertical arm abuts against the magnet front end surface to form an end surface limiting part, so that the magnet is simultaneously constrained from two dimensions of the top surface and the end surface to overcome the same polarity repulsion force of the adjacent magnet in the same guide groove. The middle part of the U-shaped pressure maintaining block has a clearance for the demolding member to pass through. The pressure maintaining method comprises the steps that the pressure maintaining block is horizontally intervened to establish double-sided constraint in the state that the material pushing member continuously presses the magnet, and the material pushing member can be withdrawn after the pressure maintaining block completely takes over the constraint.

Description

Technical Field

[0001] This invention relates to the field of magnet assembly technology, and more specifically, to a magnet bonding and pressure-holding mechanism and method that resists magnetic repulsion. Background Technology

[0002] In the manufacturing process of a high-thrust linear motor stator, multiple powerful permanent magnets need to be bonded to guide grooves in the stator base plate according to a predetermined polarity arrangement. Two magnets arranged sequentially in the same guide groove have the same polarity and repel each other, creating a magnetic field environment that poses a significant challenge to the bonding and fixing of the magnets. After the magnet is pushed into the guide groove, during the time window before the adhesive has fully cured, the repulsive force between the like poles continues to act on the magnet, tending to eject it from the guide groove. The direction of the repulsive force is outward along the axis of the guide groove. Without effective mechanical restraint, the magnet will be ejected the instant it is pushed in, making bonding impossible.

[0003] In existing manual operation methods, operators must continuously press the magnets with their fingers until the adhesive cures, which is not only inefficient but also requires a high level of operational experience. The magnets are prone to tilting or lifting under repulsive forces, leading to substandard bonding quality. Furthermore, after the magnets are bonded, the opposite magnetic attraction between magnets in adjacent guide grooves causes the product to adhere tightly to the guide fixture partition. Demolding requires applying a reverse thrust from the same space as the pressure-holding mechanism. How to achieve interference-free sequential operation of the pressure-holding and demolding components within the same confined space is an engineering problem that has not yet been effectively solved. Therefore, how to simultaneously achieve multi-dimensional anti-repulsive pressure holding of the magnets and interference-free passage of subsequent demolding components within the limited space of the guide groove is a core technical problem that needs to be solved in this field. Summary of the Invention

[0004] The main objective of this invention is to provide a magnet bonding and pressure-holding mechanism and method that resists magnetic repulsion, so as to solve the technical problem in the prior art that it is difficult to simultaneously achieve multi-dimensional anti-repulsion pressure holding of magnets and interference-free passage of demolding components within the limited space of the guide groove.

[0005] To achieve the above objectives, according to one aspect of the present invention, a magnet bonding and pressure-holding mechanism with anti-magnetic repulsion is provided, disposed on one side of a guide platform and used in conjunction with guide grooves arranged in an array on the guide platform, comprising: a fixed block rigidly connected to the support structure of the guide platform; a pressure-holding cylinder mounted on the fixed block; a pressure-holding block connecting plate connected to the piston end of the pressure-holding cylinder; and a U-shaped pressure-holding block mounted on the pressure-holding block connecting plate. The U-shaped pressure-holding block has an L-shaped structure in side view and a U-shaped structure in top view. When the piston rod of the pressure-holding cylinder retracts, it pulls the U-shaped pressure-holding block horizontally along the pushing direction of the magnet to be bonded to the corresponding position in the guide groove through the pressure-holding block connecting plate. The upper part of the U-shaped pressure-holding block passes over the top surface of the magnet to be bonded to form a top pressing surface. The inner vertical arm of the U-shaped pressure-holding block abuts against the front end face of the magnet to be bonded to form an end face limit. A clearance gap is left in the middle of the U-shaped pressure-holding block, which is directly opposite the central axis position of the magnet in the guide groove for the demolding component to pass through.

[0006] As a preferred embodiment of the present invention, the bottom of the U-shaped pressure block is provided with an inclined surface, which is used to guide the U-shaped pressure block to slide smoothly from above the magnet to be attached during horizontal movement to form a pressing effect.

[0007] As a preferred technical solution of the present invention, the span of the U-shaped pressure block along the width direction of the guide groove is not less than the total length of all magnets to be attached arranged in the same guide groove, so that the U-shaped pressure block can cover all magnets in the same guide groove at the same time when in the pressure-holding state.

[0008] As a preferred technical solution of the present invention, the fixed block and the support leg of the guide table are rigidly fixed by bolt connection, and the cylinder body of the pressure holding cylinder is fixedly installed on the fixed block by flange or bracket, so as to ensure that the whole mechanism has sufficient rigidity to resist the reaction force of magnetic repulsion during the pressure holding process.

[0009] As a preferred embodiment of the present invention, all components of the pressure holding mechanism are made of non-magnetic materials to eliminate the parasitic magnetic attraction interference of the strong magnet on the mechanism itself during the pressure holding process.

[0010] According to another aspect of the present invention, a pressure-holding method based on the above-described pressure-holding mechanism is provided, comprising the following steps: a pushing and clamping step: after the pushing member pushes the magnet to be attached into the guide groove, the pushing member remains at the entrance of the guide groove and continuously clamps the rear end face of the magnet to be attached to counteract the like-pole repulsive force generated by existing magnets in the same guide groove on the magnet to be attached; a pressure-holding intervention step: while the pushing member remains clamped, the piston rod of the pressure-holding cylinder retracts, pulling the U-shaped pressure-holding block along the direction of the magnet to be attached through the pressure-holding block connecting plate. The U-shaped pressure block moves horizontally to the corresponding position in the guide groove. The upper part of the U-shaped pressure block passes over the top surface of the magnet to be attached, forming a top pressure. The inner vertical arm abuts against the front end face of the magnet to be attached, forming an end face limit, thus completing the double-sided constraint. Pushing and retracting step: After the U-shaped pressure block has completely established the double-sided constraint of the magnet to be attached, the pushing component retracts from the rear end face of the magnet to be attached. Holding pressure and curing step: The U-shaped pressure block continues to maintain the double-sided constraint until the adhesive on the bottom surface of the magnet to be attached is completely cured. The piston rod of the pressure holding cylinder extends to make the U-shaped pressure block return to its original position.

[0011] As a preferred technical solution of the present invention, in the material pushing and retraction step, the timing of the material pushing component retraction is strictly later than the timing of the inner vertical arm of the U-shaped pressure block establishing contact with the front end face of the magnet to be attached, ensuring that the magnet to be attached is subject to rigid constraint in at least one direction at any instant, and there is no constraint vacuum period.

[0012] As a preferred technical solution of the present invention, after the pressure holding and curing step is completed, a demolding and mating step is also included: the demolding component passes through the clearance of the U-shaped pressure holding block and presses downward against the upper surface of the magnet to be attached, so as to overcome the opposite attraction between the magnet and the guide plate partition between adjacent guide grooves to complete the demolding, realizing the sequential operation of pressure holding and demolding in the same narrow space.

[0013] As a preferred technical solution of the present invention, in the demolding and fitting step, the trajectory of the demolding component moving downward and the trajectory of the U-shaped pressure block moving forward are orthogonal in space and achieve interference-free switching by avoiding gaps.

[0014] As a preferred technical solution of the present invention, in the pressure holding intervention step, the top pressing surface of the U-shaped pressure holding block applies a vertical downward component of the force to be applied to the magnet, pressing the magnet to be applied onto the stator base plate. The end face limiting force applies a horizontal limiting force to the magnet to be applied, which directly counteracts the horizontal component of the like repulsion force. The forces in the two directions work together to form a stable force closed loop.

[0015] Compared with existing technologies, this invention utilizes a unique U-shaped pressure-holding block with an L-shape when viewed from the side and a U-shape when viewed from above. This design allows the U-shaped pressure-holding block to move horizontally along the direction the magnet is pushed in when the pressure-holding cylinder retracts, simultaneously establishing rigid constraints on the magnet from both the top and front surfaces. This effectively overcomes the repulsive force between adjacent magnets in the same guide groove, preventing the magnet from being ejected, lifted, or shifted before the adhesive cures. Simultaneously, the clearance reserved in the middle of the U-shaped pressure-holding block aligns with the central axis of the magnet in the guide groove, allowing the demolding component to pass through this clearance and press down on the magnet to complete demolding without the pressure-holding block retracting. This solves the engineering problem of ensuring that the pressure-holding component and the demolding component operate sequentially without interference within the limited space of the guide groove. The timing control of the pusher component and the U-shaped pressure-holding block in the pressure-holding method ensures that there is no constraint vacuum period for the magnet throughout the entire pressure-holding process. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are 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.

[0017] The structures, proportions, sizes, etc., shown in the accompanying drawings of this specification are only for the purpose of assisting those skilled in the art in understanding and reading the content disclosed in the specification, and are not intended to limit the conditions under which the present invention can be implemented. Therefore, they have no substantial technical significance. Any modifications to the structure, changes in the proportions, or adjustments to the size, without affecting the effects and objectives that the present invention can produce, should still fall within the scope of the technical content disclosed in the present invention.

[0018] Figure 1 This is a schematic diagram of the assembly of the guide platform and the pressure holding mechanism in a preferred embodiment of the present invention; Figure 2 This is a schematic diagram of the pressure-holding mechanism in a preferred embodiment of the present invention.

[0019] Illustration: 1. U-shaped pressure holding block; 2. Pressure holding block connecting plate; 3. Fixing block; 4. Pressure holding cylinder; 5. Guide table; 501. Guide groove; 502. Support leg. Detailed Implementation

[0020] To make the objectives, features, and advantages of this invention more apparent and understandable, the technical solutions of the embodiments of this invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the embodiments described below are only some embodiments of this invention, and not all embodiments. Based on the embodiments of this invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this invention.

[0021] In the description of this invention, it should be understood that the terms "upper", "lower", "front", "rear", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0022] like Figure 1 and Figure 2 As shown, this embodiment provides a magnet bonding and pressure-holding mechanism that resists magnetic repulsion. It is located on one side of a guide platform 5 and works in conjunction with the guide grooves 501 arranged in an array on the guide platform 5. The guide platform 5 is supported in the middle of the equipment by support legs 502 and remains stationary. Multiple parallel and equally spaced guide grooves 501 are formed inside the guide platform 5, with adjacent guide grooves 501 separated by partitions. During the magnet bonding operation, the magnet a to be bonded is pushed in along the guide groove 501 by an external pushing component and bonded to the stator base plate b, which is sent to the bottom of the guide platform 5. Two magnets a arranged sequentially within the same guide groove 501 have the same polarity, resulting in a strong repulsive force between them. The function of this pressure-holding mechanism is to provide a continuous mechanical limiting force to overcome this repulsive force, ensuring that the magnet a is always firmly pressed into the predetermined position before the adhesive cures.

[0023] The pressure-holding mechanism includes a fixed block 3, a pressure-holding cylinder 4, a pressure-holding block connecting plate 2, and a U-shaped pressure-holding block 1. The fixed block 3 is rigidly connected to the support leg 502 of the guide table 5, and the two are bolted together to form a stable and rigid fixed relationship, ensuring that the entire mechanism will not be displaced or vibrate due to the reaction force of the magnetic repulsion during the pressure-holding process. The cylinder body of the pressure-holding cylinder 4 is mounted on the fixed block 3 via a flange, and the piston end of the pressure-holding cylinder 4 is drivenly connected to the U-shaped pressure-holding block 1 via the pressure-holding block connecting plate 2. The pressure-holding cylinder 4 is installed at a slightly lower position on one side of the guide table 5, and the U-shaped pressure-holding block 1 is located near the opening on one side of the guide groove 501 of the guide table 5.

[0024] The U-shaped pressure holding block 1 is the core functional component of this pressure holding mechanism, and its shape features a unique design. The U-shaped pressure holding block 1 has an L-shaped structure when viewed from the side and a U-shaped structure when viewed from above. Viewed from the side, the longitudinal section of the U-shaped pressure holding block 1 is approximately L-shaped, with its vertical portion being the inner vertical arm, its horizontal extension being the top pressing area, and its bottom having a sloping surface. Viewed from above, the horizontal projection of the U-shaped pressure holding block 1 is U-shaped, with a through clearance between the two side walls. This clearance is directly aligned with the central axis of the magnet inside the guide groove 501.

[0025] When the piston rod of the pressure-holding cylinder 4 retracts, the U-shaped pressure-holding block 1 is pulled horizontally along the pushing direction of the magnet a to be attached via the pressure-holding block connecting plate 2. The U-shaped pressure-holding block 1 moves from one side entrance of the guide groove 501 toward the magnet inside the guide groove 501. During the process of the U-shaped pressure-holding block 1 moving into position, its upper part passes over the top surface of the magnet a to be attached, forming a covering and pressing on the top surface of the magnet; its inner vertical arm extends into the end area of ​​the guide groove 501, abutting against the front end face of the magnet a to be attached. At this point, the U-shaped pressure-holding block 1 establishes a rigid constraint on the magnet from both the top and front end faces. The bottom slope serves to guide the U-shaped pressure-holding block 1 to slide smoothly from above the magnet during horizontal movement, avoiding a hard collision between the leading edge of the U-shaped pressure-holding block 1 and the upper edge of the magnet during its forward movement.

[0026] From a mechanical perspective, the repulsive force between two magnets a of the same polarity within the same guide groove 501 can be decomposed into horizontal and vertical components. The horizontal component, pointing outward along the axis of the guide groove 501, is the main driving force causing the magnet to be ejected. The vertical component is caused by magnetic field inhomogeneity, which can cause the magnet to tilt upward at certain locations. The end face of the U-shaped pressure block 1 directly resists the horizontal repulsive force component, and its vertical arm area must cover the front end face of the magnet to ensure uniform force transmission. The top pressing surface of the U-shaped pressure block 1 applies a vertically downward force to the magnet, pressing it firmly against the stator base plate b to ensure uniform pressure on the adhesive layer, and preventing the magnet from tilting and detaching from the surface of the stator base plate b due to torque imbalance. The combined effect of these two forces forms a stable force closed loop, firmly locking the magnet during the entire pressure holding period.

[0027] The clearance in the middle of the U-shaped pressure holding block 1 is another key design feature of this pressure holding mechanism. After all the magnets in the guide grooves 501 have been pressed and adhered, due to the opposite attraction of the magnets in adjacent guide grooves 501, the stator base plate b and the magnets are tightly attached to the bottom of the guide table 5 and cannot be separated by gravity. At this time, a downward pushing force needs to be applied from above the guide table 5 to push the product out. The demolding block moves vertically downward from above the guide table 5, passes through the clearance in the middle of the U-shaped pressure holding block 1, and directly presses against the upper surface of the magnet in the guide groove 501. Since the clearance is directly opposite the central axis of the magnet, the force application point of the demolding block is located exactly in the middle area of ​​the magnet, resulting in uniform force application and no off-center loading. The downward trajectory of the demolding block and the forward trajectory of the U-shaped pressure holding block 1 are orthogonal in space, and the two achieve interference-free switching through the clearance. This means that there is no need to completely remove the U-shaped pressure block 1 between the pressure holding process and the demolding process to make room for demolding, which greatly improves the efficiency of process connection in a narrow assembly space.

[0028] All components of the pressure-holding mechanism are made of non-magnetic materials, such as high-strength aluminum alloy or engineering plastics. The purpose of this material selection is to eliminate the parasitic magnetic attraction generated by the strong magnet on the mechanism itself during the pressure-holding process. If magnetic materials such as steel were used, the magnet would generate additional attraction force on the U-shaped pressure-holding block 1 and the connecting plate 2, which would increase the driving load of the pressure-holding cylinder 4 on the one hand, and generate unnecessary resistance when the pressure-holding block retracts on the other hand, affecting the operating rhythm.

[0029] The pressure-holding method based on the above-mentioned pressure-holding mechanism includes the following steps. Pushing and clamping step: The external pushing component pushes the magnet a, with its bottom surface coated with instant adhesive, into the surface of the stator base plate b along the guide groove 501. When the first magnet, previously bonded, already exists in the guide groove 501, the subsequent magnet immediately experiences a repulsive force from the first magnet upon entry. The pushing stop of the pushing component remains at the entrance of the guide groove 501 without reversing, continuously clamping the rear end face of the subsequent magnet to prevent it from being ejected by the repulsive force. At this time, the instant adhesive on the bottom surface of the magnet has just come into contact with the surface of the stator base plate b; the adhesive is still in the liquid rheological stage and far from possessing the bonding strength to independently resist the repulsive force.

[0030] Pressure holding intervention step: While the pushing component maintains a tight grip, the piston rod of the pressure holding cylinder 4 retracts, pulling the U-shaped pressure holding block 1 horizontally forward along the pushing direction of the magnet a to be attached via the pressure holding block connecting plate 2. The upper part of the U-shaped pressure holding block 1 passes over the top surface of the magnet to establish top pressure, and the inner vertical arm abuts against the front end face of the magnet to establish end face limitation, completing the double-sided constraint of the magnet. After the pressure holding intervention step is completed, the magnet is simultaneously subjected to the downward pressure and end face limitation force from the top surface of the U-shaped pressure holding block 1, the rear end face clamping force from the pushing component, and the initial adhesion force from the adhesive to the stator base plate b, and is in a state of multi-dimensional force balance.

[0031] Material ejection and retraction steps: The ejector component can only be withdrawn from the rear end face of the magnet after the U-shaped pressure block 1 has fully established double-sided constraint on the magnet. The withdrawal of the ejector component must be strictly later than the time when the inner vertical arm of the U-shaped pressure block 1 establishes contact with the front end face of the magnet. The key significance of this timing control is that if the ejector component withdraws prematurely before the U-shaped pressure block 1 establishes constraint, the magnet will be in a state of constraint only by the initial adhesive force during the extremely short time window before the U-shaped pressure block 1 is in place. This adhesive force is insufficient to counteract the peak repulsive force, and the magnet will be ejected instantly. Therefore, there is a dead time period between the ejector component and the U-shaped pressure block 1 where overlapping constraint must be maintained. During this dead time, the magnet is simultaneously constrained by both the ejector component and the U-shaped pressure block 1.

[0032] Pressure-holding curing step: After the pusher component is withdrawn, the U-shaped pressure-holding block 1 independently assumes all the constraints on the magnet. Under the constant pressure continuously applied by the U-shaped pressure-holding block 1, the instant adhesive undergoes a phase transition process from a liquid rheological state to a gel state and then to a fully cured state. After the adhesive has completely cured, the adhesive layer formed between the magnet and the stator base plate b has sufficient shear strength to independently resist the like-pole repulsion force. The piston rod of the pressure-holding cylinder 4 extends, and the U-shaped pressure-holding block 1 retracts to its original position under the action of the pressure-holding block connecting plate 2, releasing the constraint on the magnet. At this time, the magnet is firmly bonded to the stator base plate b and will no longer be pushed out by the repulsive force.

[0033] After the pressure-holding and curing step is completed, when demolding is required, the demolding block moves vertically downward from above the guide table 5, passes through the clearance in the middle of the U-shaped pressure block 1, and presses against the upper surface of the magnet to overcome the opposite attraction between the magnet and the partition between adjacent guide grooves 501, thus pushing the stator base plate b along with all the magnets downward out of the guide groove 501. Throughout the demolding process, the U-shaped pressure block 1 can remain in the retracted state, and the demolding block uses the middle clearance to complete the vertical passage without any spatial interference with the U-shaped pressure block 1.

[0034] The above description is merely a preferred embodiment of the present invention and is not intended to limit the invention. Various modifications and variations can be made to the present invention by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A magnet-adhesive pressure-holding mechanism with anti-magnetic repulsion, disposed on one side of a guide platform (5) and used in conjunction with guide grooves (501) arranged in an array on the guide platform (5), characterized in that, include: A fixed block (3) is rigidly connected to the support structure of the guide platform (5); a pressure-holding cylinder (4) is installed on the fixed block (3); a pressure-holding block connecting plate (2) is connected to the piston end of the pressure-holding cylinder (4); a U-shaped pressure-holding block (1) is installed on the pressure-holding block connecting plate (2). The U-shaped pressure-holding block (1) has an overall L-shaped structure when viewed from the side and a U-shaped structure when viewed from above. When the piston rod of the pressure-holding cylinder (4) retracts, it pulls the U-shaped pressure-holding block (1) through the pressure-holding block connecting plate (2). The magnet (a) to be attached is moved horizontally along the pushing direction to the corresponding position of the guide groove (501). The upper part of the U-shaped pressure block (1) passes over the top surface of the magnet (a) to be attached to form a top pressing surface. The inner vertical arm of the U-shaped pressure block (1) abuts against the front end face of the magnet (a) to be attached to form an end face limit. The middle part of the U-shaped pressure block (1) has a clearance gap. The clearance gap is directly opposite the central axis position of the magnet in the guide groove (501) so that the demolding component can pass through.

2. The magnet bonding and pressure-holding mechanism against magnetic repulsion according to claim 1, characterized in that, The bottom of the U-shaped pressure block (1) is provided with an inclined surface, which is used to guide the U-shaped pressure block (1) to slide smoothly from above the magnet (a) to be attached during horizontal movement to form a pressing effect.

3. The magnet bonding and pressure-holding mechanism against magnetic repulsion according to claim 1, characterized in that, The span of the U-shaped pressure block (1) along the width direction of the guide groove (501) is not less than the total length of all magnets (a) to be attached arranged in the same guide groove (501), so that the U-shaped pressure block (1) can cover all magnets in the same guide groove (501) at the same time when in a pressure-holding state.

4. The magnet bonding and pressure-holding mechanism against magnetic repulsion according to claim 1, characterized in that, The fixed block (3) and the support leg (502) of the guide platform (5) are rigidly fixed by bolts, and the cylinder body of the pressure holding cylinder (4) is fixedly installed on the fixed block (3) by flange or bracket.

5. The magnet bonding and pressure-holding mechanism against magnetic repulsion according to claim 1, characterized in that, All components of the pressure-holding mechanism are made of non-magnetic materials.

6. A pressure-holding method based on the pressure-holding mechanism according to any one of claims 1 to 5, characterized in that, Includes the following steps: Pushing and clamping step: After the pushing component pushes the magnet (a) to be attached into the guide groove (501), the pushing component remains at the entrance of the guide groove (501) and continuously clamps the rear end face of the magnet (a) to be attached, so as to counteract the like-pole repulsive force generated by the existing magnets in the same guide groove (501) on the magnet (a); Pressure holding intervention step: When the pushing component is kept clamped, the piston rod of the pressure holding cylinder (4) retracts, and the U-shaped pressure holding block (1) is pulled horizontally along the pushing direction of the magnet (a) to the corresponding position of the guide groove (501) through the pressure holding block connecting plate (2). The upper part of the U-shaped pressure block (1) passes over the top surface of the magnet to be attached (a) to form a top pressure, and the inner vertical arm abuts against the front end face of the magnet to be attached (a) to form an end face limit, thus completing the double-sided constraint; Pushing and withdrawing step: After the U-shaped pressure block (1) has completely established the double-sided constraint on the magnet to be attached (a), the pushing component is withdrawn from the rear end face of the magnet to be attached (a); Holding pressure and curing step: The U-shaped pressure block (1) continues to maintain the double-sided constraint until the glue on the bottom surface of the magnet to be attached (a) is cured, and the piston rod of the pressure cylinder (4) extends to make the U-shaped pressure block (1) return to its original position.

7. The pressure-holding method according to claim 6, characterized in that, In the material pushing and retraction step, the material pushing component is retracted at a time that is strictly later than the time when the inner vertical arm of the U-shaped pressure block (1) and the front end face of the magnet to be attached (a) are in contact, so as to ensure that the magnet to be attached (a) is subjected to rigid constraint in at least one direction at any instant.

8. The pressure-holding method according to claim 6, characterized in that, After the pressure holding and curing step is completed, the demolding step is also included: the demolding component passes through the clearance of the U-shaped pressure block (1) and presses down on the upper surface of the magnet (a) to be attached, so as to overcome the opposite attraction between the magnet and the partition of the guide table (5) between the adjacent guide grooves (501) to complete the demolding.

9. The pressure-holding method according to claim 8, characterized in that, In the demolding and fitting step, the trajectory of the demolding component moving downward is orthogonal in space to the trajectory of the U-shaped pressure block (1) moving forward, and the non-interference switching is achieved through the avoidance gap.

10. The pressure-holding method according to claim 6, characterized in that, In the pressure holding intervention step, the vertical downward component of the pressure applied by the top pressing surface of the U-shaped pressure holding block (1) to the magnet to be attached (a) presses the magnet to be attached (a) onto the stator base plate (b), and the horizontal limiting force applied by the end face limiting force to the magnet to be attached (a) directly opposes the horizontal component of the like repulsion force.

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