Forming die of samarium-cobalt permanent magnet

Abstract

The utility model provides a forming die of a samarium-cobalt permanent magnet, and belongs to the technical field of samarium-cobalt magnet manufacturing. According to the utility model, the female die with the cavity is arranged, the lower end of the upper pressing head with the upper concave cavity arranged in the arc shape is inserted into the cavity and slides relatively, and meanwhile, the upper end of the lower pressing head with the lower concave cavity arranged in the V shape is inserted into the cavity and slides relatively; the upper concave cavity and the lower concave cavity form the fan-shaped forming material cavity, a fan-shaped blank can be directly pressed through the forming material cavity and can be kept consistent with a finished samarium-cobalt permanent magnet in shape, the one-time near-net forming machining requirement is met, the problem of material waste caused by excess materials generated in the existing technological processes of cutting, grinding and the like is solved, and the production efficiency is improved. The manufacturing cost is effectively reduced, the machining process is simplified, the machining period is shorter, the manufacturing cost is lower, the workload is lighter, the uniformity of products is ensured, and the quality of the products is ensured.

Description

Technical Field

[0001] The utility model relates to the technical field of samarium cobalt magnet manufacturing, in particular to a molding die for a samarium cobalt permanent magnet. Background Art

[0002] Samarium cobalt permanent magnet, as a type of permanent magnet, belongs to the second generation of rare earth permanent magnet materials. It is widely used in defense and military industry, aerospace, microwave sensing, and high-end magnetic product manufacturing industries due to its unique high-temperature magnetic properties, excellent stability, excellent oxidation resistance and corrosion resistance. Therefore, under the premise of ensuring its product performance, improving its processing efficiency and processing cost has become the direction of industry research.

[0003] In actual use, due to its wide range of applications, the shapes and specifications of samarium cobalt permanent magnets are also diverse. In addition to conventional shapes (such as square pieces, round pieces, tiles, and bread shapes, etc.), there are also many special-shaped structures to adapt to different occasions of use. As a common special-shaped samarium cobalt permanent magnet, the fan-shaped sheet-shaped samarium cobalt permanent magnet is usually prepared into a rectangular blank in the blank manufacturing stage, and then the rectangular blank is processed into the required special-shaped structure through more complex processing techniques such as cutting and grinding to meet the use requirements. Although the above method can meet the processing of special-shaped samarium cobalt permanent magnets, in actual processing, the method of first preparing the whole and then cutting and grinding will produce more scraps, there is too much material waste, and the manufacturing cost is increased. In addition, the steps of cutting and grinding need to be operated step by step, resulting in complex processes and long processing cycles. It not only increases the labor burden, but also easily leads to greater product differentiation and affects the quality of the product. Summary of the invention

[0004] In view of the above problems existing in the prior art, the present invention aims to provide a forming mold for a samarium cobalt permanent magnet, which is provided with a female mold with a cavity, and an upper pressure head and a lower pressure head are arranged in the cavity, and the cavity between the upper pressure head and the lower pressure head forms a fan-shaped forming cavity, so that the shape of the blank pressed by the forming cavity can be directly consistent with the shape of the finished samarium cobalt permanent magnet, realizing one-time near-net forming, which will not produce excess material and cause material waste, and can also reduce cutting, grinding and other processes, simplify the processing technology, shorten the processing cycle, reduce the manufacturing cost, reduce the workload, and also can achieve product unification and improve product quality.

[0005] The specific technical solutions are as follows:

[0006] A molding die for a samarium cobalt permanent magnet has the following characteristics:

[0007] A female mold is provided with a cavity penetrating in a vertical direction, and the cross section of the cavity is arranged in a rectangular shape;

[0008] An upper pressing head, the lower end of which is inserted from the upper opening of the cavity and slides relatively, and the end surface of the lower end of the upper pressing head is arranged in an arc shape to form an upper concave cavity;

[0009] The lower ram, the upper end of the lower ram is inserted into the lower opening of the cavity and slides relatively, the end face of the upper end of the lower ram is provided with a lower cavity arranged in a "V" shape, and when the lower end of the upper ram contacts the upper end of the lower ram, the upper cavity and the lower cavity form a molding cavity with a fan-shaped structure.

[0010] The above-mentioned molding die for a samarium cobalt permanent magnet, wherein the side walls corresponding to the two long sides of the cavity with a rectangular cross section on the female mold are respectively the left side plate and the right side plate, and the left side plate and the right side plate are made of magnetic conductive materials, and the side walls corresponding to the two short sides of the cavity with a rectangular cross section are respectively the front side plate and the rear side plate, and the front side plate and the rear side plate are both made of non-magnetic conductive materials.

[0011] In the above-mentioned molding die for the samarium cobalt permanent magnet, the upper pressing head and the lower pressing head are both made of non-magnetic conductive materials.

[0012] In the above-mentioned molding die for a samarium cobalt permanent magnet, magnet supply components are arranged outside the left and right plates of the female mold, and the magnetic lines of force of the magnetic field generated by the magnet supply components pass through the left and right plates in sequence along one direction.

[0013] In the above-mentioned molding die for a samarium-cobalt permanent magnet, the magnet supply component is an electromagnet with a planar pole head.

[0014] In the above-mentioned molding die for the SmCo permanent magnet, the outer walls of the front side plate and the rear side plate of the female mold are provided with inwardly recessed embedding grooves along the vertical direction.

[0015] In the above-mentioned molding die for the samarium cobalt permanent magnet, the upper end of the upper pressing head and the lower end of the lower pressing head are both provided with protruding connectors, and one side surface of the connector is in an isosceles trapezoidal shape.

[0016] In the above-mentioned molding die for samarium cobalt permanent magnets, when the lower end of the upper ram contacts the upper end of the lower ram, the end surface of the upper end of the upper ram and the end surface of the lower end of the lower ram can be flush with the upper end surface and the lower end surface of the female mold respectively.

[0017] The above-mentioned molding die for a samarium cobalt permanent magnet, wherein both ends of the side on which the left and right plates of the female mold are arranged opposite to each other are provided with a clamping groove arranged in the vertical direction, and the cross-section of the clamping groove is arranged in an "L" shape, and both ends of the front and rear side plates of the female mold are provided with a clamping head with an "L"-shaped cross-section, and the clamping heads at both ends of the front side plate are respectively clamped into the clamping grooves at the same end of the left and right plates, and at the same time, the clamping heads at both ends of the rear side plate are respectively clamped into the clamping grooves at the other end of the left and right plates.

[0018] The positive effects of the above technical solution are:

[0019] The above-mentioned molding die of the samarium cobalt permanent magnet is provided with a female mold with a cavity, and an upper pressing head with an upper concave cavity arranged in an arc shape and a lower pressing head with a lower concave cavity arranged in a "V" shape. The upper pressing head and the lower pressing head are inserted into the cavity and slide against each other. The upper concave cavity and the lower concave cavity form a molding cavity arranged in a fan shape. When the blank is pressed, a fan-shaped blank can be directly obtained, which can be consistent with the shape of the finished samarium cobalt permanent magnet, and a near-net molding can be achieved in one time without the need for additional process operations such as cutting and grinding. It not only avoids the generation of waste materials, avoids material waste, and reduces manufacturing costs, but also simplifies the processing technology, shortens the processing cycle, and reduces manufacturing costs, thereby reducing the workload, ensuring the uniformity of the products, and making the product quality better. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 This is a structural diagram of an embodiment of a molding die for a samarium-cobalt permanent magnet of the utility model;

[0021] Figure 2 It is a cross-sectional view of an embodiment of a molding die for a samarium-cobalt permanent magnet of the utility model;

[0022] Figure 3 This is a structural diagram of an upper pressing head of a molding die for a samarium cobalt permanent magnet of the utility model;

[0023] Figure 4 This is a structural diagram of a lower pressure head of a molding die for a samarium cobalt permanent magnet of the utility model;

[0024] Figure 5 The utility model is a schematic diagram of the connection of the female mold of the molding mold of the samarium cobalt permanent magnet.

[0025] In the accompanying drawings: 1, female mold; 11, cavity; 12, left side plate; 13, right side plate; 14, front side plate; 15, rear side plate; 111, molding cavity; 121, slot; 141, embedding groove; 142, clamping head; 2, upper pressure head; 21, upper concave cavity; 22, connecting head; 3, lower pressure head; 31, lower concave cavity. DETAILED DESCRIPTION

[0026] In order to make the technical means, creative features, objectives and effects of the present invention easy to understand, the following embodiments are combined with the attached Figure 1 To Attachment Figure 5 The technical solution provided by the utility model is described in detail, but the following content is not intended to limit the utility model.

[0027] Figure 1 This is a structural diagram of an embodiment of a molding die for a samarium-cobalt permanent magnet of the utility model; Figure 2 1 is a cross-sectional view of an embodiment of a molding die for a samarium-cobalt permanent magnet of the utility model. Figure 1 and Figure 2 As shown, the molding die of the samarium cobalt permanent magnet provided in this embodiment includes: a female die 1, an upper pressing head 2 and a lower pressing head 3.

[0028] Specifically, the female mold 1 is provided with a cavity 11 penetrating in the vertical direction, so that the upper pressure head 2 and the lower pressure head 3 subsequently slidably arranged in the cavity 11 can move in the vertical direction, thereby better adapting to the use of the vertical molding press, and at the same time, it is also convenient for the loading of powder and the removal of the blank after molding. In addition, the cross section of the cavity 11 is arranged in a rectangular shape, so that when pressing in the vertical direction, the blank is arranged in a sheet shape, which provides conditions for the subsequent formation of a samarium cobalt permanent magnet with a fan-shaped sheet structure.

[0029] Figure 3 This is a structural diagram of the upper pressure head of a molding die for a samarium-cobalt permanent magnet of the utility model. Figure 1 , Figure 2 as well as Figure 3 As shown, the upper ram 2 is arranged in a rod shape, and the lower end of the upper ram 2 is inserted into the cavity 11 from the upper opening of the cavity 11, and the upper ram 2 can slide relatively in the cavity 11 to adjust the position of the end face of the lower end of the upper ram 2 in the cavity 11. At this time, the end face of the lower end of the upper ram 2 is arranged in an arc shape and forms an upper concave cavity 21, that is, the cavity bottom of the upper concave cavity 21 is arranged in an arc shape, which provides conditions for the subsequent formation of the arc top structure of the fan-shaped molding cavity 111.

[0030] Figure 4 This is a structural diagram of the lower pressure head of a molding die for a samarium cobalt permanent magnet of the utility model. Figure 1 , Figure 2 as well as Figure 4As shown, the lower punch 3 is arranged in a rod shape, and the upper end of the lower punch 3 is inserted into the cavity 11 from the lower opening of the cavity 11, and the lower punch 3 can slide relatively in the cavity 11, so that the position of the end face of the upper end of the lower punch 3 in the cavity 11 can be adjusted. At this time, a lower concave cavity 31 arranged in a "V" shape is opened on the end face of the upper end of the lower punch 3, that is, the bottom of the lower concave cavity 31 is arranged in a "V" shape, which provides conditions for the subsequent formation of a V-shaped bottom structure of the fan-shaped molding cavity 111. Moreover, when the lower end of the upper pressure head 2 is in contact with the upper end of the lower pressure head 3, a fan-shaped molding cavity 111 can be formed through the upper cavity 21 and the lower cavity 31, so that the powder located in the molding cavity 111 can be pressed into a fan-shaped blank, so that the shape of the pressed blank can be consistent with the shape of the finished samarium cobalt permanent magnet, meeting the one-time near-net molding processing requirements, avoiding the generation of waste materials, preventing material waste, and reducing manufacturing costs. At the same time, it can also save cutting, grinding and other processes, simplify the processing technology, shorten the processing cycle, and reduce the workload, thereby ensuring the uniformity of the product and improving the product quality.

[0031] More specifically, the side walls corresponding to the two long sides of the cavity 11 with a rectangular cross section on the female mold 1 are respectively set as the left side plate 12 and the right side plate 13. At this time, the left side plate 12 and the right side plate 13 are both made of magnetic conductive materials, so that the magnetic lines of force can smoothly pass through the left side plate 12 and the right side plate 13. In addition, the side walls corresponding to the two short sides of the cavity 11 with a rectangular cross section are respectively set as the front side plate 14 and the rear side plate 15. At this time, the front side plate 14 and the rear side plate 15 are both made of non-magnetic conductive materials, so that the front side plate 14 and the rear side plate 15 are not affected by the magnetic field, which provides conditions for adding magnetic lines of force to enhance the rotation ability of the powder particles when the blank is pressed later.

[0032] More specifically, the upper pressing head 2 and the lower pressing head 3 that slide relatively during pressing are made of non-magnetic materials, so that the upper pressing head 2 and the lower pressing head 3 are not affected by the magnetic field. It also provides conditions for improving the rotation ability of the powder particles by adding magnetic lines of force during subsequent pressing of the blank, avoiding the influence of the upper pressing head 2 and the lower pressing head 3 on the passage of the magnetic lines of force, and the structural design is more reasonable.

[0033] More specifically, a magnet supply assembly is provided outside the left plate 12 and the right plate 13 of the female mold 1. At this time, when the magnet supply assembly is working, the magnetic lines of force of the magnetic field generated by the magnet supply assembly pass through the left plate 12 and the right plate 13 in sequence along one direction, and the passing direction of the magnetic lines of force is the arrangement direction of the two short sides of the cavity 11 with a rectangular cross-section, so that the magnetic lines of force can pass through in a direction perpendicular to the fan-shaped surface of the molding cavity 111, so that the powder particles subsequently loaded into the molding cavity 111 are easier to rotate to provide conditions for improving the orientation degree of the samarium cobalt permanent magnet material, and the structural design is more reasonable.

[0034] More specifically, the magnet supply component is an electromagnet with a planar pole head, so that when the magnet supply component generates a magnetic field, the magnetic force lines of the generated magnetic field can evenly pass through the left plate 12 and the right plate 13, thereby maintaining the uniform distribution of magnetic force lines at various locations in the molding cavity 111 and ensuring product quality. It is worth pointing out that the electromagnet with a planar pole head is a commonly used electromagnet on the market and can be directly purchased and installed for use, so its specific structure is not repeated here.

[0035] More specifically, an inwardly recessed embedding groove 141 is provided on the outer wall of the front side plate 14 and the rear side plate 15 of the female mold 1 in the vertical direction, so that the front side plate 14 and the rear side plate 15 of the female mold 1 have a limiting structure, thereby facilitating the installation of the female mold 1 on the molding press and limiting each other with the clamping strip on the molding press through the embedding groove 141, so as to achieve stable and accurate installation of the female mold 1. It is worth pointing out that the molding press can be a commonly used press on the market, which has its own clamping strip for mold installation, and its specific structure and the way of mutual cooperation belong to common knowledge, so it will not be described in detail in this embodiment.

[0036] More specifically, a protruding connector 22 is provided on the upper end surface of the upper pressure head 2 and the lower end surface of the lower pressure head 3. Preferably, the connector 22 and the corresponding upper pressure head 2 and the corresponding lower pressure head 3 are all integrated structures, with higher structural strength and better structural stability. In addition, the side shape of the connector 22 is arranged in an isosceles trapezoid, and the end of each connector 22 close to the corresponding upper pressure head 2 and the corresponding lower pressure head 3 is a small head end, so that the end of each connector 22 away from the corresponding upper pressure head 2 and the corresponding lower pressure head 3 is a large head end, so that when the upper pressure head 2 and the lower pressure head 3 are installed on the pressure rod of the forming press, the connector 22 and the connecting groove on the pressure rod can be mutually engaged and limited, which can not only facilitate the connection between the upper pressure head 2 and the lower pressure head 3 and the pressure rod of the forming press, but also prevent the upper pressure head 2 and the lower pressure head 3 from accidentally falling off during use, and the structural stability is better. It is also worth pointing out that the forming press can be a commonly used press on the market, and its pressure rod has a connecting groove with an isosceles trapezoidal cross-section that cooperates with the upper pressure head 2 and the lower pressure head 3, so that the pressure rod can be stably connected with the upper pressure head 2 and the lower pressure head 3.

[0037] More specifically, when the lower end of the upper ram 2 and the upper end of the lower ram 3 are in contact, that is, after press forming, the end face of the upper end of the upper ram 2 can be flush with the upper end face of the female die 1, and at the same time, the end face of the lower end of the lower ram 3 can be flush with the lower end face, so that when the upper ram 2 and the lower ram 3 are pushed into place, the blank is just press formed. At this time, the end of the pressure rod of the forming press will be restricted by the upper and lower end faces of the female die 1, preventing the upper ram 2 and the lower ram 3 from being excessively pushed and causing mutual extrusion damage, and the structural design is more reasonable.

[0038] Figure 5 The figure is a schematic diagram of the connection of the female mold of a molding mold for a samarium-cobalt permanent magnet of the utility model. Figure 1 and Figure 5 As shown, both ends of the side where the left side plate 12 and the right side plate 13 of the female mold 1 are arranged oppositely are provided with a clamping groove 121 arranged in the vertical direction, that is, both ends of the left side plate 12 and the right side plate 13 have a clamping groove 121, and the notch of the clamping groove 121 faces the side where the left side plate 12 and the right side plate 13 are arranged oppositely, so that the clamping groove 121 is conveniently installed with the front side plate 14 and the rear side plate 15. At this time, the cross section of the clamping groove 121 is arranged in an "L" shape, so that a bending limit can be formed on the groove wall of the clamping groove 121. In addition, both ends of the front side plate 14 and the rear side plate 15 of the female mold 1 are provided with a clamping head 142 with an "L"-shaped cross-section. During subsequent installation, the clamping heads 142 at both ends of the front side plate 14 are respectively inserted into the clamping grooves 121 located at the same end on the left side plate 12 and the right side plate 13. At the same time, the clamping heads 142 at both ends of the rear side plate 15 are respectively inserted into the clamping grooves 121 located at the other end on the left side plate 12 and the right side plate 13. The frame structure is formed by the cooperation of the clamping heads 142 and the clamping grooves 121, which not only facilitates installation, but also facilitates disassembly, which is beneficial to subsequent cleaning and maintenance.

[0039] The molding die of the samarium cobalt permanent magnet provided in the present embodiment comprises a female die 1, an upper punch 2 and a lower punch 3; by setting the female die 1 with a cavity 11, and inserting the lower end of the upper punch 2 with an arc-shaped upper cavity 21 into the cavity 11 and sliding relatively, at the same time, inserting the upper end of the lower punch 3 with a "V"-shaped lower cavity 31 into the cavity 11 and sliding relatively, the upper cavity 21 and the lower cavity 31 form a fan-shaped molding cavity 111, and the fan-shaped blank can be directly pressed by the molding cavity 111, which can maintain the same shape as the finished samarium cobalt permanent magnet, meet the one-time near-net molding processing requirements, not only avoid the problem of waste of materials caused by excess materials in the existing cutting, grinding and other processes, effectively reduce the manufacturing cost, and also simplify the processing technology, so that the processing cycle is shorter, the manufacturing cost is lower, and the workload is lighter, ensuring the uniformity of the product and the product quality.

[0040] The above are only preferred embodiments of the present invention, and do not limit the implementation mode and protection scope of the present invention. Those skilled in the art should be aware that all solutions obtained by equivalent substitutions and obvious changes made using the description and illustrations of the present invention should be included in the protection scope of the present invention.

Claims

1. A molding die for a samarium cobalt permanent magnet, characterized in that: include: A female mold, wherein a cavity is formed on the female mold and passes through the mold in a vertical direction, and the cross section of the cavity is arranged in a rectangular shape; An upper pressing head, the lower end of which is inserted into and relatively slides from the upper opening of the cavity, and the end surface of the lower end of the upper pressing head is arranged in an arc shape to form an upper concave cavity; A lower ram, the upper end of which is inserted into and relatively slides from the lower opening of the cavity, the end face of the upper end of the lower ram is provided with a lower concave cavity arranged in a "V" shape, and when the lower end of the upper ram contacts the upper end of the lower ram, the upper concave cavity and the lower concave cavity form a molding cavity with a fan-shaped structure.

2. The molding die of the samarium cobalt permanent magnet according to claim 1, characterized in that: The side walls corresponding to the two long sides of the cavity with a rectangular cross-section on the female mold are respectively a left side plate and a right side plate, and the left side plate and the right side plate are made of magnetic conductive materials. The side walls corresponding to the two short sides of the cavity with a rectangular cross-section are respectively a front side plate and a rear side plate, and the front side plate and the rear side plate are both made of non-magnetic conductive materials.

3. The molding die of the samarium cobalt permanent magnet according to claim 2, characterized in that: The upper pressing head and the lower pressing head are both made of non-magnetic conductive materials.

4. The molding die of the samarium cobalt permanent magnet according to claim 3, characterized in that: A magnet supply assembly is disposed outside the left side plate and the right side plate of the female mold, and magnetic lines of force of the magnetic field generated by the magnet supply assembly pass through the left side plate and the right side plate in sequence along one direction.

5. The molding die for the samarium cobalt permanent magnet according to claim 4, characterized in that: The magnet supply component is an electromagnet with a planar pole head.

6. The molding die for the samarium cobalt permanent magnet according to claim 2, characterized in that: The outer walls of the front side plate and the rear side plate of the female mold are both provided with inwardly recessed embedding grooves along the vertical direction.

7. The molding die of the samarium cobalt permanent magnet according to claim 1, characterized in that: The upper end of the upper pressure head and the lower end of the lower pressure head are both provided with protruding connectors, and a side surface of the connector is in an isosceles trapezoidal shape.

8. The molding die for the samarium cobalt permanent magnet according to claim 1, characterized in that: When the lower end of the upper ram contacts the upper end of the lower ram, the end surface of the upper end of the upper ram and the end surface of the lower end of the lower ram can be flush with the upper end surface and the lower end surface of the female mold respectively.

9. The molding die for the samarium cobalt permanent magnet according to claim 2, characterized in that: Both ends of the side where the left side plate and the right side plate of the female mold are arranged opposite to each other are provided with card slots arranged in the vertical direction, and the cross-section of the card slots is arranged in an "L" shape. Both ends of the front side plate and the rear side plate of the female mold are provided with card heads with an "L"-shaped cross-section, and the card heads at both ends of the front side plate are respectively inserted into the card slots at the same end of the left side plate and the right side plate, and at the same time, the card heads at both ends of the rear side plate are respectively inserted into the card slots at the other end of the left side plate and the right side plate.

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