A magnetic sheet pressing device for generator magnetic steel production

Abstract

The application relates to a magnetic sheet pressing device for generator magnetic steel production and belongs to the technical field of tool fixtures. The device comprises a bottom plate, a frame, a head cover and a sealing cover. The bottom plate, the frame, the head cover and the sealing cover are assembled to form an assembled jig with an internal cavity for arranging magnetic sheets. The frame and the head cover are located at the same layer and are installed on the bottom plate. The frame is in a U shape and the opening is closed by the head cover. The frame is internally arranged for arranging magnetic sheets. The sealing cover is installed on the frame and prevents the magnetic sheets from separating from the frame. The sealing cover is provided with an open hole. The application has the effect of facilitating demolding.

Description

Technical Field

[0001] This application relates to the field of tooling and fixtures, and in particular to a magnetic sheet pressing device for the production of generator magnets. Background Technology

[0002] Generator magnets are permanent magnets in generators used to generate magnetic fields. Generator magnets are usually made by pressing magnetic sheets together, a structure that is very common in permanent magnet generators.

[0003] The production process of the aforementioned generator magnets mainly involves the pressing of magnetic sheets. To ensure proper pressing of the magnets, specialized magnet assembly fixtures are usually used. Adjacent magnetic sheets are glued together. The assembly process generally involves first applying glue to the magnetic sheets, then assembling the magnetic sheets into the fixture, and then pressing them together. The magnetic sheets and fixtures are baked together to complete the final curing, and finally demolding is performed. Common magnetic sheet pressing fixtures include a pressing container with an opening on one side and a cover. After applying glue, each magnetic sheet is installed into the pressing container in sequence, and then the cover is installed and fixed to press the magnetic sheets in the pressing container together.

[0004] Although the above-mentioned magnetic sheet pressing tooling achieves the function of pressing magnetic sheets, demolding is inconvenient. Summary of the Invention

[0005] In order to better demold the pressed magnets, this application provides a magnetic sheet pressing device for the production of generator magnets.

[0006] The magnetic sheet pressing device for generator magnet production provided in this application adopts the following technical solution: A magnetic sheet pressing device for producing generator magnets includes a base plate, a frame, a head cover, and a sealing cover. The base plate, the frame, the head cover, and the sealing cover are assembled to form an assembly fixture with an internally hollow structure for placing magnetic sheets. The frame and the head cover are located on the same layer and are installed on the base plate. The frame is U-shaped and its opening is closed by the head cover. Magnetic sheets are arranged and placed inside the frame. The sealing cover is installed on the frame and prevents the magnetic sheets from detaching from the frame. The sealing cover has an open hole.

[0007] By adopting the above technical solution, the assembly fixture for placing magnetic sheets is designed into four parts: a base plate, a frame, a head cover, and a sealing cover. On the one hand, the magnetic sheets can be arranged and glued together on the base plate to form magnets, which is more convenient for assembly and better adapts to assembly line assembly. After the sealing cover and head cover are assembled, the assembled magnets are confined in the assembly fixture for subsequent pressing and baking. The open holes on the sealing cover allow the magnetic sheets to be exposed as much as possible without detaching from the assembly fixture, which is beneficial for subsequent baking operations. On the other hand, after baking, the sealing cover and head cover can be removed to easily demold the magnets. Disassembling the base plate, frame, head cover, and sealing cover together allows for direct and convenient demolding. The entire assembly fixture facilitates the placement and gluing of magnetic sheets in the early stage, ensures the baking effect in the middle stage, and facilitates the demolding of magnets in the later stage. The structure is simple and effective.

[0008] Optionally, the frame has structural notches on both sides of the inner wall facing the head cover, and the head cover extends into the frame with an abutting part, and the abutting part and the inner wall of the frame are spaced apart to form a structural gap.

[0009] By adopting the above technical solution, and by creating structural gaps and designing structural clearances, the corners of the magnets will not be bumped when they are confined within the frame. This reduces the impact on the magnetic sheets during placement, baking, and demolding, making the magnets less prone to damage. At the same time, since the magnetic sheets can be placed outside the frame during the arrangement process, and the presence of structural gaps creates movement gaps when the magnets are inside the frame, there is greater operational freedom when assembling the jig. Furthermore, the head cover installation is not restricted by the abutment part, which better presses the magnets together.

[0010] Optionally, the head cover is only connected and fixed to the frame.

[0011] By adopting the above technical solution, the head cover is pressed together under force. The process of installing and fastening the head cover is also the process of pressing the magnetic sheet together. The head cover is directly connected to the frame, so that the positioning is not affected by the positioning accuracy and dimensional accuracy of the base plate and the cover. When demolding, the base plate and the cover can be removed first, and then the head cover can be opened for demolding. Demolding is smoother and ensures the accurate timing of magnet demolding. It is beneficial to reduce the possibility of magnet falling and bumping during demolding on the production line and provide precise protection.

[0012] Optionally, the frame is only connected and fixed to the base plate, the cover is only connected and fixed to the frame, the two sides of the base plate are connected to the two sides of the frame by multiple fasteners, the two sides of the frame are connected to the two sides of the cover by multiple fasteners, and the connection positions between the frame and the cover are staggered relative to the connection positions between the frame and the cover.

[0013] By adopting the above technical solution, the fastening force distribution of the base plate and the cover on the frame is more uniform, reducing the stress deformation of the cover and the base plate. The position of the magnetic sheet between the cover and the base plate is not easily changed, ensuring that the height between adjacent magnetic sheets is equal during the magnetic steel forming process, thus guaranteeing the quality of the magnetic steel after pressing and baking.

[0014] Optionally, an insert is also provided, which magnetically engages with the magnetic sheet. The surface of the insert that is in contact with the magnetic sheet is set as the working surface, and at least a portion of each magnetic sheet extends out of the working surface.

[0015] By adopting the above technical solution, the magnetic sheets can be arranged and glued on the insert first, which is more convenient. At the same time, arranging the magnetic sheets on the insert allows for better positioning and ensures that the spacing between each layer of magnetic sheets is the same, that is, the glue layer thickness between adjacent magnetic sheets is consistent. Each magnetic sheet is at least partially located outside the working surface, so that the assembled magnet can be placed into the frame. Then, force is applied to the suspended part of the magnetic sheet to detach the magnet from the insert. This ensures that the magnet is more smoothly detached from the insert and enters the frame, and is less prone to displacement. The magnetic attraction between the insert and the magnetic sheet satisfies both positioning and detachment requirements.

[0016] Optionally, the insert includes a gripping portion and a working portion, the working portion protruding from the gripping portion, the working portion having a working surface opposite to the surface of the gripping portion, and the working portion passing through the opening of the cover.

[0017] By adopting the above technical solution, the insert can be used in conjunction with the cover. Before the magnetic sheet is placed in the insert, the cover can be assembled with the insert. On the one hand, this allows the magnetic sheet to be better supported at both ends when it is placed on the insert, reducing possible bumps. On the other hand, when the insert, carrying the magnetic sheet, enters the frame, the cover also reaches the corresponding position on the frame, allowing for the completion of the cover installation. During the cover installation process, the positioning of the magnetic sheet in the frame is also completed due to the need for positioning, which serves as a preliminary position detection function. After the cover installation is completed, the insert only needs to be removed from the frame, and the cover will then remove the magnetic sheet and place it in the corresponding position in the frame. The whole process is smooth and reasonable, without increasing the interference with the magnetic sheet. While facilitating the gluing and placement of the magnetic sheet, it does not affect the accuracy of the position and state between the magnetic sheets, nor does it add too many processes, better matching the assembly line production operation of magnets.

[0018] Optionally, a weak magnet is installed on the working surface of the insert and magnetically engages with the magnetic sheet. The weak magnet is located inside the insert and does not directly contact the magnetic sheet.

[0019] By adopting the above technical solution and using a weak magnet, it is easier for the magnet to detach from the working surface. The magnet does not come into direct contact with the magnetic sheet, eliminating the possibility of contact and friction between the magnetic sheet and the weak magnet, reducing the impact on the magnetic sheet. The weak magnet is located inside the insert, which further facilitates the detachment of the magnet from the working surface.

[0020] Optionally, the working surface of the insert has a magnet hole for mounting the weak magnet, the weak magnet is embedded in the magnet hole, and the thickness of the weak magnet is less than the depth of the magnet hole.

[0021] By adopting the above technical solution, the installation of weak magnets can be facilitated in the most direct way. At the same time, the replacement and maintenance of weak magnets can be carried out in the future. In particular, the contact area between the insert and the magnetic sheet is reduced. Furthermore, since each magnetic sheet requires a corresponding weak magnet for adsorption, the existence of the magnet hole for installing the weak magnet facilitates the positioning of the magnetic sheet. If it is a production line, it will be beneficial for subsequent equipment maintenance.

[0022] Optionally, the weak magnet is integrally injection molded with a shell, which is fixed to the insert with screws.

[0023] By adopting the above technical solution, the weak magnet can be easily disassembled and replaced by screws. Compared with friction-type embedding and fixing, the weak magnet is more firmly installed on the insert, and the shell makes it easy to drive in the screws.

[0024] Optionally, the insert is provided with a positioning protrusion, and the frame is provided with a positioning groove for the positioning protrusion to be inserted.

[0025] By adopting the above technical solution, the insert and the frame are also positioned and matched, which makes it easy for the insert to be accurately assembled with the frame and for the assembled magnetic sheet to be inserted into the frame.

[0026] In summary, the assembly fixture for placing the magnetic sheets is designed with four parts: a base plate, a frame, a head cover, and a cap. On the one hand, the magnetic sheets can be arranged and glued together on the base plate to form magnets, which is more convenient for assembly and better suited for assembly line production. After the cap and head cover are assembled, the assembled magnets are confined within the assembly fixture for subsequent pressing and baking. The open holes on the cap allow the magnetic sheets to be exposed as much as possible without detaching from the assembly fixture, which is beneficial for subsequent baking operations. On the other hand, after baking, the cap and head cover can be removed for easy demolding of the magnets. Disassembling the base plate, frame, head cover, and cap together allows for direct and convenient demolding. The entire assembly fixture facilitates the initial placement and gluing of the magnetic sheets, ensures the baking effect in the middle stage, and facilitates the demolding of the magnets in the later stage. The structure is simple and effective. Attached Figure Description

[0027] Figure 1 This is a schematic diagram of the placement of the magnets within the frame in an embodiment of this application; Figure 2 This is a schematic diagram of the assembly fixture and insert in the embodiments of this application; Figure 3 This is a schematic diagram of the assembly fixture in the embodiments of this application; Figure 4 This is a schematic diagram of the insert and cap in the embodiments of this application; Figure 5 This is a schematic diagram of the structure of the insert in the embodiments of this application; Figure 6 This is a cross-sectional view of the mounting structure of the weak magnet in the embodiments of this application.

[0028] Explanation of reference numerals in the attached drawings: 1. Magnet; 11. Magnetic sheet; 12. Abutting surface; 13. Primary angle; 14. Intermediate angle; 15. Glue layer; 2. Assembly fixture; 21. Base plate; 22. Frame; 221. Structural notch; 222. Positioning groove; 23. Head cover; 231. Abutting part; 232. Positioning notch; 233. Positioning structural groove; 24. Cover; 241. Opening hole; 3. Insert; 31. Grip part; 32. Working part; 321. Working protrusion; 322. Corresponding groove; 323. Working surface; 324. Magnet hole; 33. Positioning protrusion; 34. Positioning post; 4. Structural gap; 5. First fastening hole; 6. Second fastening hole; 7. Weak magnet; 8. Shell. Detailed Implementation

[0029] The following is in conjunction with the appendix Figure 1-6 This application will be described in further detail.

[0030] This application discloses a magnetic sheet pressing device for producing generator magnets.

[0031] With attachment Figure 1 Taking the magnet 1 shown as an example, the lower part of the magnet 1 in the figure is an isosceles trapezoid, and the upper part is an arc surface away from the lower part, which is set as the contact surface 12. In addition to the four corners, the magnet 1 also forms two corners at the junction of the isosceles trapezoidal part and the square part, which are set as the middle corners 14. The four corners of the magnet 1 are set as the original corners 13. The magnet 1 is formed by gluing and fixing multiple magnetic sheets 11 of the same thickness together. An adhesive layer 15 is formed between adjacent magnetic sheets 11, and the thickness of each adhesive layer 15 is as consistent as possible, that is, the spacing between adjacent magnetic sheets 11 is kept as consistent as possible.

[0032] Reference Figure 1 and Figure 2A magnetic sheet 11 pressing device for producing generator magnets 1 includes an assembly fixture 2 and a matching insert 3. The assembly fixture 2 is assembled from four independent parts. The assembly fixture 2 is used to wrap the magnetic sheet 11, which is glued together to form the magnet 1, and complete the pressing step. Then, the assembly fixture 2, along with the internal magnet 1, is subjected to a baking step. The insert 3 is used to assist the magnetic sheet 11 in forming the magnet 1 and placing it into the assembly fixture 2.

[0033] Reference Figure 1 and Figure 3 Specifically, the assembly fixture 2 is hollow inside for housing the magnet 1. The assembly fixture 2 includes a base plate 21, a frame 22, a head cover 23, and a sealing cover 24. The base plate 21 is a square plate, the frame 22 is U-shaped and is fixed to the base plate 21 with screws. The inner wall of the frame 22 is adapted to the shape of the magnet 1. The head cover 23 is fixed to the frame 22 with screws at both ends, and the opening of the frame 22 is closed by the head cover 23, so that the base plate 21, frame 22, and head cover 23 form a box with an opening on one side. At the same time, the head cover 23 extends into the frame 22 and protrudes to provide an abutment part 231, which abuts against... The side wall of part 231 facing away from the head cover 23 is an arc surface and fits the abutting surface 12 of the magnet 1. The head cover 23 is only connected and fixed to the frame 22. The magnetic sheet 11 inside the frame 22 is pressed by screws at both ends of the head cover 23 to the frame 22. At the same time, structural notches 221 are opened on both sides of the inner wall of the frame 22 facing the head cover 23. The inner wall of the structural notch 221 is part of a cylindrical surface. The length of the abutting part 231 at the opening of the frame 22 is less than the length of the opening of the frame 22, so that there is a gap between the abutting part 231 and the inner wall of the frame 22, forming two structural gaps 4.

[0034] The two structural notches 221 and two structural gaps 4 mentioned above correspond to the four original corners 13 of the magnet 1, while the inner wall of the frame 22 also has a structural notch 221 at the middle corner 14 of the magnet 1. At the same time, structural notches 221 are also provided at the junction of the two sides of the abutment part 231 and the head cover 23, so that the two sides of the abutment part 231 have a certain rigid deformation capacity when under pressure, which has a certain advantage when pressing.

[0035] Meanwhile, the thickness of the frame 22 is the same as that of the head cover 23. The cover 24 is installed on the frame 22 and prevents the magnetic piece 11 from detaching from the frame 22. The cover 24 has an open hole 241, so that the side of the magnetic piece 11 facing the cover 24 is exposed as much as possible. Specifically, the cover 24 and the head cover 23 are not in the same position on the base plate 21. That is, the cover 24 is only on the frame 22. The thickness of the head cover 23 does not affect its extension under the cover 24, but it does not extend under the cover 24, so that the cover 24 will not affect the removal of the head cover 23. The head cover 23 is not left or right. The head cover 23 can be installed smoothly after the cover 24 is installed.

[0036] The frame 22 is only connected and fixed to the base plate 21, and the cover 24 is only connected and fixed to the frame 22. Both sides of the base plate 21 are connected to both sides of the frame 22 by multiple fasteners, and both sides of the frame 22 are connected to both sides of the cover 24 by multiple fasteners. The connection positions between the frame 22 and the cover 24 are staggered relative to the connection positions between the frame 22 and the cover 24, so that the cover 24 is fastened to the frame 22 while reducing rigid deformation. The cover 24 effectively restricts the magnetic sheet 11. In this embodiment, both sides of the frame 22 are fastened to both sides of the base plate 21 by four fasteners, and both sides of the frame 22 are also fastened to both sides of the cover 24 by four fasteners.

[0037] The hole for fastening the frame 22 to the base plate 21 is designated as the first fastening hole 5, and the hole for fastening the frame 22 to the cover 24 is designated as the second fastening hole 6. The diameter of the first fastening hole 5 is larger than that of the second fastening hole 6, and the line connecting the two first fastening holes 5 on the same side is parallel to the line connecting the two second fastening holes 6. However, the line connecting the first fastening holes 5 is closer to the inner side of the frame 22 than the line connecting the second fastening holes 6. The first fastening hole 5 is also located on the side of the frame 22 away from the head cover 23 relative to the second fastening hole 6. At the same time, the second fastening hole 6 closest to the head cover 23 is located next to the structural notch 221 in the middle of the frame 22, while the first fastening hole 5 farthest from the head cover 23 is located next to the structural notch 221 below the frame 22.

[0038] The aforementioned cover 24 is rectangular, and both ends of the cover 24 along its length are mounted on the frame 22. The open hole 241 on the cover 24 is opened along the width direction of the cover 24. The open hole 241 is a rectangular hole, and the length direction of the open hole 241 is the width direction of the cover 24. In this embodiment, there are three open holes 241, and a connecting strip is formed between adjacent open holes 241. Since the connecting strip extends along the arrangement direction of the magnetic pieces 11 in the frame 22, the open hole 241 is open while preventing the individual magnetic pieces 11 from detaching.

[0039] Reference Figure 1 , Figure 3 and Figure 4 The insert 3 and the magnetic sheet 11 are magnetically attracted to each other. Specifically, the insert 3 includes a holding part 31 and a working part 32. The working part 32 has a working protrusion 321 protruding from the side wall away from the holding part 31. There are three working protrusions 321, and each of the three working protrusions 321 corresponds to one of the three open holes 241 on the cover 24. The three working protrusions 321 are fitted into the three open holes 241 on the cover 24, so that the cover 24 can be assembled on the insert 3. The insert 3 can be installed on the frame 22 together with the cover 24. The working protrusions 321 on both sides have corresponding grooves 322 in the area of ​​the frame 22, so that when the magnetic sheet 11 is placed on the insert 3, the corresponding placement position of the magnetic sheet 11 can be confirmed by the corresponding grooves 322.

[0040] The surface of the working protrusion 321 that the magnetic sheet 11 adheres to is designated as the working surface 323. That is, the side wall of the working protrusion 321 away from the gripping part 31 is the working surface 323, while the part of the magnetic sheet 11 located at the connecting strip position on the cover 24 extends out of the working surface 323. After the insert 3 places the cover 24 and the magnetic sheet 11, the cover 24 is installed on the frame 22. By removing the insert 3, the magnetic sheet 11 can be neatly and intactly placed into the frame 22.

[0041] Reference Figure 2 and Figure 5 The working surface 323 of the insert 3 is equipped with a weak magnet 7 for magnetic attraction with the magnetic sheet 11. Specifically, the working surfaces 323 on both sides of the insert 3 are equipped with weak magnets 7, and in addition to the two upper and lower magnetic sheets 11, the two ends of the remaining magnetic sheets 11 in the middle of the magnet 1 are respectively matched with a weak magnet 7, so as to position and magnetically attract each magnetic sheet 11, and better ensure the spacing between magnetic sheets 11.

[0042] Reference Figure 6 The specific installation method of the weak magnet 7 is as follows: the weak magnet 7 is integrally injection molded with a shell 8, and the working surface 323 of the insert 3 has a magnet hole 324 for the weak magnet 7 to be installed. The weak magnet 7, which is wrapped with the shell 8, is embedded in the magnet hole 324, and the overall thickness is less than the depth of the magnet hole 324. That is, after the weak magnet 7 is installed in place, the magnet hole 324 is still partially open and not closed. The working part 32 is screwed into the surface of the working surface 323 away from the surface of the working part 323 to be threaded and fixed with the shell 8, so as to finally realize the installation and fixation of the weak magnet 7 in the magnet hole 324.

[0043] Reference Figure 2 , Figure 3 and Figure 5Meanwhile, the insert 3 has a positioning protrusion 33 and a positioning post 34 on the side wall of the working part 32. The frame 22 has a positioning groove 222 on the inner wall facing the head cover 23 for the positioning protrusion 33 to be inserted into, and the abutting part 231 of the head cover 23 has a positioning notch 232 on the side wall facing the frame 22. When the insert 3 with the cover 24 is installed on the frame 22, the positioning protrusion 33 is inserted into the positioning groove 222, and the positioning post 34 slides into the positioning notch 232. The inner wall of the positioning notch 232 has positioning structure grooves 233 on both sides, so that the positioning post 34 is not There will be direct contact, with a gap margin. At the same time, the distance between the positioning protrusion 33 and the positioning post 34 is greater than the length of the magnet 1 along the arrangement direction of the magnetic sheet 11. Specifically, in this embodiment, the magnet 1 abuts against the positioning protrusion 33 but is spaced apart from the positioning post 34, so that when the magnetic sheet 11 is arranged on the insert 3, the magnetic sheet 11 that abuts against the positioning protrusion 33 is placed first, then the subsequent magnetic sheets 11 are arranged in sequence, and finally the magnetic sheet 11 close to the positioning post 34 is placed. Therefore, when the magnetic sheets 11 at both ends of the magnet 1 are placed, the weak magnet 7 on the insert 3 is not required for adsorption and fixation.

[0044] In a further embodiment, a weak magnet 7 can also be installed on the positioning protrusion 33 to attract and fix the first magnetic sheet 11. Preferably, the positioning protrusion 33 is not provided with a weak magnet 7.

[0045] Meanwhile, the size of the gripping part 31 is smaller than that of the working part 32, and the gripping part 31 is located on the working part 32 at the position corresponding to the middle working protrusion 321, so that the gripping part 31 is easy to grip and does not affect the installation of the weak magnet 7.

[0046] In assembly line operation, the gripping part 31 of the insert 3 can be fixed on the assembly line equipment with the working surface 323 facing upward. Then, the cover 24, magnetic sheet 11, frame 22, base plate 21 and head cover 23 are installed on the insert 3 in sequence. In manual operation, the insert 3 is used by holding the gripping part 31. In this case, it is preferable to set a weak magnet 7 on the positioning protrusion 33.

[0047] Meanwhile, the process of installing the frame 22 on the aforementioned insert 3 also plays a certain detection role, detecting the accuracy of the placement of the magnetic sheet 11. The base plate 21 and the frame 22 can be assembled together to form a whole, and then the frame 22 and the base plate 21 are connected and fixed to the cover 24.

[0048] The implementation principle of the magnetic sheet pressing device for generator magnet production in this application embodiment is as follows: a block blank is cut into corresponding magnetic sheets 11 by length cutting and thickness cutting, then the cover 24 is installed on the insert 3, and the corresponding magnetic sheets 11 are installed in sequence on the working surface 323 of the insert 3. Adjacent magnetic sheets 11 are fixed with glue, then the frame 22 and the base plate 21 are installed, and finally the head cover 23 is installed. The assembled jig 2 and the magnet 1 are removed from the insert 3 together for baking. Finally, the base plate 21 and the frame 22 are removed first, and then the head cover 23 is removed to complete the demolding of the magnet 1 from the frame 22. The produced magnet 1 is then magnetized, thus completing the overall production of the magnet 1.

[0049] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A magnetic sheet pressing device for producing generator magnets, characterized in that: The assembly includes a base plate (21), a frame (22), a head cover (23), and a cover (24). The base plate (21), the frame (22), the head cover (23), and the cover (24) are assembled to form an assembly fixture (2) for placing a hollow magnetic sheet (11). The frame (22) and the head cover (23) are located on the same layer and are installed on the base plate (21). The frame (22) is U-shaped and its opening is closed by the head cover (23). The magnetic sheet (11) is arranged inside the frame (22). The cover (24) is installed on the frame (22) and prevents the magnetic sheet (11) from detaching from the frame (22). The cover (24) has an open hole (241).

2. The magnetic sheet pressing device for generator magnet production according to claim 1, characterized in that: The frame (22) has structural notches (221) on both sides of the inner wall facing the head cover (23). The head cover (23) extends into the frame (22) and has an abutment part (231). The abutment part (231) and the inner wall of the frame (22) are spaced apart and form a structural gap (4).

3. The magnetic sheet pressing device for generator magnet production according to claim 1, characterized in that: The head cover (23) is only connected and fixed to the frame (22).

4. The magnetic sheet pressing device for generator magnet production according to claim 1, characterized in that: The frame (22) is only connected and fixed to the base plate (21), and the cover (24) is only connected and fixed to the frame (22). Both sides of the base plate (21) are connected to both sides of the frame (22) by multiple fasteners. Both sides of the frame (22) are connected to both sides of the cover (24) by multiple fasteners. The connection position between the frame (22) and the cover (24) is staggered relative to the connection position between the frame (22) and the cover (24).

5. The magnetic sheet pressing device for generator magnet production according to claim 1, characterized in that: It is also equipped with an insert (3), which magnetically engages with the magnetic sheet (11). The surface of the insert (3) that is attached to the magnetic sheet (11) is set as a working surface (323), and each magnetic sheet (11) has at least a portion that extends out of the working surface (323).

6. The magnetic sheet pressing device for generator magnet production according to claim 5, characterized in that: The insert (3) includes a gripping part (31) and a working part (32). The working part (32) protrudes from the gripping part (31), and the working surface (323) is provided on the surface of the working part (32) away from the gripping part (31). The working part (32) passes through the opening (241) of the cover (24).

7. The magnetic sheet pressing device for generator magnet production according to claim 5, characterized in that: The working surface (323) of the insert (3) is equipped with a weak magnet (7) and magnetically attracted to the magnetic sheet (11). The weak magnet (7) is located inside the insert (3) and does not directly contact the magnetic sheet (11).

8. The magnetic sheet pressing device for generator magnet production according to claim 7, characterized in that: The working surface (323) of the insert (3) is provided with a magnet hole (324) for mounting the weak magnet (7). The weak magnet (7) is embedded in the magnet hole (324), and the thickness of the weak magnet (7) is less than the depth of the magnet hole (324).

9. A magnetic sheet pressing device for generator magnet production according to claim 8, characterized in that: The weak magnet (7) is integrally injection molded with a shell (8), and the shell (8) is fixed with the insert (3) by screws.

10. A magnetic sheet pressing device for generator magnet production according to claim 5, characterized in that: The insert (3) is provided with a positioning protrusion (33), and the frame (22) is provided with a positioning groove (222) for the positioning protrusion (33) to be inserted.

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