Forming die for annular magnetic steel

Abstract

The utility model discloses a forming die for annular magnetic steel, which comprises a first die plate and a second die plate covering the first die plate, and a forming space is formed between the first die plate and the second die plate. A first sliding block set relatively sliding in the length direction of the forming space and a second sliding block set relatively sliding in the width direction of the forming space are arranged in the forming space, and the first sliding block set extrudes the second sliding block set and tends to move. The inner contours of the first sliding block group and the second sliding block group are encircled to form an arc-shaped forming cavity, and a forming column is arranged in the center of the forming cavity.

Description

Technical Field

[0001] The utility model relates to the technical field of molding dies, and particularly relates to a molding die for an annular permanent magnet. Background Art

[0002] Neodymium iron boron permanent magnets have excellent magnetic properties and are widely used in the fields of electronics, electric motors, medical devices, toys, packaging, hardware machinery, aerospace, etc. More commonly, they are used in permanent magnet motors, loudspeakers, magnetic separators, computer disk drives, magnetic resonance imaging equipment and instruments. After the permanent magnet is formed, it is formed by pressing in contact with magnetic powder through the forming blocks of the molding die.

[0003] Magnets are usually formed by pressing magnetic powder in a mold cavity. Since existing molds are all extruded and formed in a single direction, the density is not uniform enough, affecting the performance of the magnets. Summary of the Utility Model

[0004] In order to solve the technical problems existing in the background art, the utility model provides a molding die for an annular permanent magnet.

[0005] The technical solution adopted by the utility model to solve its technical problems is as follows:

[0006] A molding die for an annular permanent magnet includes a first template and a second template covering the first template. A molding space is formed between the first template and the second template.

[0007] A first slider group that slides relatively along the length direction of the molding space and a second slider group that slides relatively along the width direction of the molding space are arranged in the molding space. The first slider group presses the second slider group and tends to move it, so that the inner contours of the first slider group and the second slider group enclose an arc-shaped molding cavity, and a molding column is arranged at the center of the molding cavity.

[0008] Preferably, a first sliding inclined surface is formed on the first slider group, and a second sliding inclined surface matching the first sliding inclined surface is formed on the second slider group. Through the above improvement, when the first slider group moves towards the molding column from both sides, the second sliding inclined surface on the second slider group slides along the first sliding inclined surface, so that the inner contours of the first slider group and the second slider group enclose an arc-shaped molding cavity, the force received by the outer periphery of the magnetic powder is the same, and the density of the formed permanent magnet is more uniform, improving the molding quality.

[0009] Preferably, the first slider group includes a first side slider and a second side slider, the second slider group includes a first end slider and a second end slider, abutting planes are formed on the first side slider and the second side slider, and when the abutting planes are fitted, the inner contours of the first slider group and the second slider group enclose an arc-shaped forming cavity. Through the above improvement, the first side slider and the second side slider approach each other from the left and right sides, and during the movement, the first side slider and the second side slider squeeze and push the first end slider and the second end slider, so that the first end slider and the second end slider slide relatively up and down, thereby enabling the first slider group and the second slider group to synchronously squeeze the magnetic powder from all around, and pressing the magnetic powder into a permanent magnet in the forming cavity, and the formed permanent magnet has a more uniform seal.

[0010] Preferably, the forming column is arranged on the first template, and a threaded section is formed on the forming column, and a threaded hole matching the threaded section is formed on the first template. Through the above improvement, the forming column is fixed on the first template by using the threaded section and the threaded hole on the first template, improving the convenience of installation and disassembly of the forming column.

[0011] Preferably, the forming column includes a connecting portion threadedly connected to the first template, and a forming portion sleeved on the outer periphery of the connecting portion, and a clamping convex portion is formed on the forming portion, and a clamping groove for placing the clamping convex portion is formed on the forming portion. Through the above improvement, the connecting portion can be used to threadedly connect with the first template, and the forming portion can be quickly replaced by the cooperation of the clamping convex portion and the clamping groove, and the size of the forming portion can be replaced according to requirements to match the production requirements, so as to improve the convenience of production.

[0012] Preferably, a driving rack is connected to the side of the first side slider, a driving gear is rotatably arranged on the first template, a driven rack is connected to the side of the second side slider, the driving gear meshes with the driving rack and the driven rack respectively, and the driving rack drives the driving gear to rotate so that the first side slider and the second side slider slide relatively. Through the above improvement, the driving unit is used to drive the first side slider to move, the first side slider will drive the driving rack to move, and during the movement of the driving rack, the driving gear will be driven to rotate, and the driving gear will drive the second side slider, so that the first side slider and the second side slider synchronously squeeze the first end slider and the second end slider from both sides, enabling the first side slider and the second side slider, as well as the first end slider and the second end slider, to synchronously squeeze the magnetic powder all around, improving the forming quality of the permanent magnet.

[0013] Preferably, a sliding convex part for connecting the driving rack and the driven rack is formed on the side parts of the first side part slider and the second side part slider, and a sliding groove for the sliding convex part to slide is formed on the first template. Through the above improvement, the stability of the first side part slider and the second side part slider during the sliding process is improved, so as to further improve the molding quality.

[0014] Preferably, a rotating shaft is provided on the first template, and the driving gear is rotatably arranged on the rotating shaft. Through the above improvement, the driving gear is rotatably arranged on the rotating shaft, which ensures the stability of the driving gear during the rotation process and the reliability of the relative sliding process between the first side part slider and the second side part slider.

[0015] Preferably, a guiding column is formed on the second template, and a guiding hole for the guiding column to be inserted into is formed on the first template. Through the above improvement, the cooperation of the guiding column and the guiding hole makes it more convenient for the first template and the second template to be closed.

[0016] Preferably, driving racks are arranged on both sides of the first side part slider. Through the above improvement, the driving racks on both sides drive the driving gears on both sides to rotate simultaneously, and synchronously drive the second side part slider to move, which improves the stability of the second side slider during the sliding process.

[0017] Compared with the prior art, the utility model has the following advantages and beneficial effects:

[0018] By arranging a forming column on the first template, and arranging a first slider group and a second slider group in the forming space, driving the first slider group to move relatively from both sides, the first slider group will squeeze and force the relative movement from the upper and lower ends during the movement process. When the first slider group and the second slider group slide to a certain position, the inner contours of the first slider group and the second slider group enclose an arc-shaped forming cavity, so that the inner walls of the first slider group and the second slider group simultaneously extrude the magnetic powder, so that the forces received by the outer circumference of the magnetic powder are the same, and the density of the formed permanent magnet is more uniform, improving the forming quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 is a schematic structural diagram of the whole of Embodiment 1 of the utility model;

[0020] Figure 2 is a schematic structural diagram of the cooperation between the first slider group and the second slider group in Embodiment 1 of the utility model;

[0021] Figure 3 is a schematic structural diagram of the first slider group of Embodiment 1 of the utility model;

[0022] Figure 4 is a schematic structural diagram of the second slider group of Embodiment 1 of the utility model;

[0023] Figure 5 Explosion view of the overall structure of the fourth embodiment of the present utility model;

[0024] Figure 6 Schematic structural view of the second template of the fourth embodiment of the present utility model;

[0025] Figure 7 Schematic structural view of the cooperation between the first slider group and the second slider group in the third embodiment of the present utility model;

[0026] Figure 8 Schematic structural view of the sliding implementation mode of the first slider group in the third embodiment of the present utility model;

[0027] Figure 9 Schematic structural view of the first template of the third embodiment of the present utility model;

[0028] Figure 10 Schematic structural view of the first template of the second embodiment of the present utility model;

[0029] Figure 11 Schematic structural view of the forming column of the second embodiment of the present utility model;

[0030] In the figure: 1. First template; 2. Second template; 3. Forming space; 4. First slider group; 5. Second slider group; 6. Forming cavity; 7. Forming column; 101. First sliding inclined surface; 102. Second sliding inclined surface; 103. First side slider; 104. Second side slider; 105. First end slider; 106. Second end slider; 107. Abutting plane; 201. Threaded section; 202. Threaded hole; 203. Connecting part; 204. Forming part; 205. Clamping convex part; 206. Clamping groove; 301. Driving rack; 302. Driving gear; 303. Driven rack; 304. Sliding groove; 305. Rotating shaft; 306. Sliding convex part; 401. Guide post; 402. Guide hole; Specific implementation manners

[0031] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all of the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present utility model.

[0032] It should be understood that although terms such as upper, middle, lower, top, one end, etc. appear in this text to describe various components, these components are not limited by these terms. These terms are only used to distinguish components from each other for easy understanding, rather than to define any directional or sequential limitations.

[0033] Embodiment 1

[0034] As Figures 1-4 shown, a forming mold for an annular permanent magnet includes a first template 1 and a second template 2 covering between the first templates 1. A forming space 3 is formed between the first template 1 and the second template 2;

[0035] Specifically, a first slider group 4 that slides relatively along the length direction of the forming space 3 and a second slider group 5 that slides relatively along the width direction of the forming space 3 are arranged in the forming space 3. The first slider group 4 squeezes the second slider group 5 to move from both sides and tends to make it slide, so that the inner contours of the first slider group 4 and the second slider group 5 enclose a circular arc-shaped forming cavity 6, and a forming column 7 is arranged at the center of the forming cavity 6.

[0036] By arranging the forming column 7 on the first template 1 and arranging the first slider group 4 and the second slider group 5 in the forming space 3, driving the first slider group 4 to move relatively from both sides, the first slider group 4 will squeeze and force the second slider group 5 to move relatively from the upper and lower ends during the movement. When the first slider group 4 and the second slider group 5 slide to a certain position, the inner contours of the first slider group 4 and the second slider group 5 enclose a circular arc-shaped forming cavity 6, so that the inner walls of the first slider group 4 and the second slider group 5 synchronously squeeze the magnetic powder, so that the forces received by the outer periphery of the magnetic powder are the same, and the density of the formed permanent magnet is more uniform, improving the forming quality.

[0037] As Figures 1-4 shown, for a further explanation of the cooperation between the first slider group 4 and the second slider group 5 in this embodiment, a first sliding inclined surface 101 is formed on the first slider group 4, and a second sliding inclined surface 102 that cooperates with the first sliding inclined surface 101 is formed on the second slider group 5.

[0038] When the first slider group 4 moves from both sides towards the forming column 7, the second sliding inclined surface 102 on the second slider group 5 slides along the first sliding inclined surface 101, so that the inner contours of the first slider group 4 and the second slider group 5 enclose a circular arc-shaped forming cavity 6, making the forces received by the outer periphery of the magnetic powder the same, and the density of the formed permanent magnet is more uniform, improving the forming quality.

[0039] Specifically, the first slider group 4 includes a first side slider 103 and a second side slider 104, the second slider group 5 includes a first end slider 105 and a second end slider 106, and abutting planes 107 are formed on the first side slider 103 and the second side slider 104.

[0040] During the molding process, the first side slider 103 and the second side slider 104 approach each other from the left and right sides, and during the movement, they squeeze and push the first end slider 105 and the second end slider 106, causing the first end slider 105 and the second end slider 106 to slide relatively up and down, so that the first slider group 4 and the second slider group 5 synchronously squeeze the magnetic powder from all around, press it into a magnetic steel in the molding cavity 6, and make the formed magnetic steel seal more uniform.

[0041] Embodiment Two

[0042] As Figure 10 、 Figure 11 shown, the difference between this embodiment and Embodiment One is that the molding column 7 is arranged on the first template 1, and a threaded section 201 is formed on the molding column 7, and a threaded hole 202 matching the threaded section 201 is formed on the first template 1. By connecting the threaded section 201 with the threaded hole 202 on the first template 1, the molding column 7 is fixed on the first template 1, improving the convenience of installation and disassembly of the molding column 7.

[0043] Specifically, the molding column 7 includes a connecting portion 203 threadedly connected to the first template 1, and a molding portion 204 sleeved on the outer periphery of the connecting portion 203. A clamping convex portion 205 is formed on the molding portion 204, and a clamping groove 206 for placing the clamping convex portion 205 is formed on the molding portion 204.

[0044] During the manufacturing process, the connecting portion 203 can be threadedly connected to the first template 1, and the quick replacement of the molding portion 204 can be realized by the cooperation of the clamping convex portion 205 and the clamping groove 206, and the size of the molding portion 204 can be changed according to requirements to match the production requirements, so as to improve the convenience of production.

[0045] Embodiment Three

[0046] As Figure 7 、 Figure 8 、 Figure 9 shown, the difference between this embodiment and Embodiment One is that a driving rack 301 is connected to the side of the first side slider 103, a driving gear 302 is rotatably arranged on the first template 1, a driven rack 303 is connected to the side of the second side slider 104, the driving gear 302 meshes with the driving rack 301 and the driven rack 303 respectively, and the driving rack 301 drives the driving gear 302 to rotate, so that the first side slider 103 and the second side slider 104 slide relatively.

[0047] During the forming process, the driving structure is used to drive the first side slider 103 to move. The first side slider 103 will drive the driving rack 301 to move. And during the movement of the driving rack 301, it will drive the driving gear 302 to rotate. The driving gear 302 will drive the second side slider 104, so that the first side slider 103 and the second side slider 104 simultaneously extrude the first end slider 105 and the second end slider 106 from both sides, causing the first side slider 103 and the second side slider 104, as well as the first end slider 105 and the second end slider 106 to simultaneously extrude the magnetic powder in all directions, improving the forming quality of the magnetic steel.

[0048] Preferably, sliding protrusions 306 for connecting the driving rack 301 and the driven rack 303 are formed on the sides of the first side slider 103 and the second side slider 104. Sliding grooves 304 for the sliding protrusions 306 to slide are formed on the first template 1, ensuring the stability of the first side slider 103 and the second side slider 104 during the sliding process to improve the forming effect.

[0049] Preferably, a rotating shaft 305 is provided on the first template 1, and the driving gear 302 is rotatably arranged on the rotating shaft 305. The driving gear 302 being rotatably arranged on the rotating shaft 305 ensures the stability of the driving gear 302 during the rotation process and the reliability during the relative sliding process of the first side slider 103 and the second side slider 104.

[0050] Preferably, driving racks 301 are provided on both sides of the first side slider 103. The driving racks 301 on both sides simultaneously drive the driving gears 302 on both sides to rotate and synchronously drive the second side slider 104 to move, improving the stability of the second side slider during the sliding process.

[0051] Embodiment 4

[0052] As Figure 5 、 Figure 6 shown, the difference between this embodiment and Embodiment 1 is that a guiding column 401 is formed on the second template 2, and a guiding hole 402 for the guiding column 401 to be inserted into is formed on the first template 1. By using the cooperation of the guiding column 401 and the guiding hole 402, it is more convenient for the first template 1 and the second template 2 to be closed.

[0053] This specific embodiment is only an explanation of the present invention and is not a limitation thereof. Those skilled in the art can make modifications without creative contributions to this embodiment as needed after reading this specification, but as long as it is within the scope of the claims of the present invention, it is protected by the patent law.

Claims

1. A forming die for an annular permanent magnet, characterized in that, It includes a first template (1) and a second template (2) covering the first template (1), and a forming space (3) is formed between the first template (1) and the second template (2); A first slider group (4) that slides relatively along the length direction of the forming space (3) and a second slider group (5) that slides relatively along the width direction of the forming space (3) are arranged in the forming space (3), and the first slider group (4) presses the second slider group (5) and tends to move it, so that the inner contours of the first slider group (4) and the second slider group (5) enclose an arc-shaped forming cavity (6), and a forming column (7) is arranged at the center of the forming cavity (6).

2. The forming die for an annular permanent magnet according to claim 1, characterized in that, A first sliding inclined surface (101) is formed on the first slider group (4), and a second sliding inclined surface (102) that cooperates with the first sliding inclined surface (101) is formed on the second slider group (5).

3. The forming die for an annular permanent magnet according to claim 1, wherein, The first slider group (4) includes a first side slider (103) and a second side slider (104), the second slider group (5) includes a first end slider (105) and a second end slider (106), abutting planes (107) are formed on the first side slider (103) and the second side slider (104), and when the abutting planes (107) are in contact, the inner contours of the first slider group (4) and the second slider group (5) enclose an arc-shaped forming cavity (6).

4. The forming die of an annular permanent magnet according to claim 1, characterized in that, The forming column (7) is arranged on the first template (1), and a threaded section (201) is formed on the forming column (7), and a threaded hole (202) that cooperates with the threaded section (201) is formed on the first template (1).

5. The forming die for an annular permanent magnet according to claim 4, characterized in that, The forming column (7) includes a connecting portion (203) threadedly connected to the first template (1) and a forming portion (204) sleeved on the outer periphery of the connecting portion (203), a clamping convex portion (205) is formed on the forming portion (204), and a clamping groove (206) for the clamping convex portion (205) to be inserted is formed on the forming portion (204).

6. The forming die for an annular permanent magnet according to claim 3, characterized in that, A driving rack (301) is connected to the side of the first side slider (103), a driving gear (302) is rotatably arranged on the first template (1), a driven rack (303) is connected to the side of the second side slider (104), the driving gear (302) meshes with and drives the driving rack (301) and the driven rack (303) respectively, and the driving rack (301) drives the driving gear (302) to rotate, so that the first side slider (103) and the second side slider (104) slide relatively.

7. The forming die of an annular permanent magnet according to claim 6, characterized in that, Sliding convex portions (306) for connecting the driving rack (301) and the driven rack (303) are formed on the sides of the first side slider (103) and the second side slider (104), and a sliding groove (304) for the sliding convex portions (306) to slide is formed on the first template (1).

8. The forming die for an annular permanent magnet according to claim 6, characterized in that, A rotating shaft (305) is arranged on the first template (1), and the driving gear (302) is rotatably arranged on the rotating shaft (305).

9. The forming die for an annular permanent magnet according to claim 1, wherein A guide post (401) is formed on the second template (2), and a guide hole (402) for inserting the guide post (401) is formed on the first template (1).

10. The forming die for an annular permanent magnet according to claim 6, characterized in that, Driving racks (301) are arranged on both sides of the first side slider (103).

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