Manufacturing tool and method for manufacturing a ring-shaped component

Abstract

This invention provides a tooling assembly and a method for preparing an annular component. The tooling assembly is used to form the annular component and includes: a mounting plate assembly having a mounting cavity for placing powder to be formed; a first groove at the bottom of the mounting plate assembly and a group of positioning holes on its side; a mounting cover plate detachably mounted on top of the mounting plate assembly, located at the opening of the mounting cavity; the mounting cover plate having a second groove, the recessed portion of the second groove being opposite to the recessed portion of the first groove to form a cylindrical cavity; and a positioning post inserted into the group of positioning holes, located within the cylindrical cavity. The technical solution provided by this invention solves the technical problem of high forming cost of annular components in the prior art.

Description

Technical Field

[0001] This invention relates to the field of annular component fabrication technology, and more specifically, to a fabrication tooling and a method for fabricating annular components. Background Technology

[0002] Currently, powder compression molding is a traditional yet innovative process technology. It's involved in various material technology fields, from traditional ceramics to modern nanomaterials. As a malleable process, it alters the material's form, making it more suitable for its application. In modern materials applications, irregularly shaped and ring-shaped products have become common forms. For ring-shaped components, especially their molding methods, it's generally necessary to first form a cylindrical structure, then machine to remove the central hole, and finally perform secondary machining to obtain the ring-shaped component blank.

[0003] However, the existing method for forming ring products wastes materials and is not conducive to reducing production costs. In addition, for the material forming process of the center hole, it is easier to achieve when the diameter of the center hole is larger. However, when the diameter of the center hole is less than 30mm and the wall thickness of the ring is less than 5mm, the difficulty of forming the center hole increases significantly, and eccentricity is prone to occur, resulting in a low yield. At the same time, the work efficiency of the above forming process is low. Summary of the Invention

[0004] The main objective of this invention is to provide a method for preparing tooling and annular components, so as to solve the technical problem of high molding cost of annular components in the prior art.

[0005] To achieve the above objectives, according to one aspect of the present invention, a manufacturing fixture is provided for molding an annular component. The manufacturing fixture includes: a mounting plate assembly having a mounting cavity for placing powder to be molded, a first groove being provided at the bottom of the mounting plate assembly, and a group of positioning holes being provided on the side of the mounting plate assembly; a mounting cover plate detachably disposed on the top of the mounting plate assembly, the mounting cover plate being located at the opening of the mounting cavity, the mounting cover plate having a second groove, the recess of the second groove being opposite to the recess of the first groove to form a cylindrical cavity; and a positioning post inserted into the group of positioning holes, the positioning post being located within the cylindrical cavity.

[0006] Furthermore, the mounting plate assembly includes: a mounting base plate having a first side, a second side, a third side, and a fourth side connected in sequence; a first mounting side plate detachably disposed on the first side of the mounting base plate; a second mounting side plate detachably disposed on the second side of the mounting base plate; a third mounting side plate detachably disposed on the third side of the mounting base plate; and a fourth mounting side plate detachably disposed on the fourth side of the mounting base plate. The mounting base plate, the first mounting side plate, the second mounting side plate, the third mounting side plate, and the fourth mounting side plate form a mounting cavity.

[0007] Furthermore, the positioning hole assembly includes: a first positioning hole and a second positioning hole, the first positioning hole and the second positioning hole being arranged opposite to each other, one end of the positioning post being detachably disposed in the first positioning hole, and the other end of the positioning post being detachably disposed in the second positioning hole.

[0008] Furthermore, there are multiple first grooves, which are spaced apart along the extension direction of the mounting plate assembly; there are multiple second grooves, which are spaced apart along the extension direction of the mounting cover plate, and the multiple second grooves are arranged in a one-to-one correspondence with the multiple first grooves, with each second groove and its corresponding second groove forming a corresponding cylindrical cavity.

[0009] Furthermore, there are multiple positioning hole groups, and each positioning hole group is set in a one-to-one correspondence with a multiple cylindrical cavity, with each positioning hole group located in the corresponding cylindrical cavity.

[0010] Furthermore, the powder to be formed is made of magnetic material, while the positioning post is made of non-magnetic material.

[0011] According to another aspect of the present invention, a method for preparing an annular component is provided, using the preparation fixture provided above. The method for preparing an annular component includes: installing a positioning post of the preparation fixture in a positioning hole group of the preparation fixture; adding permanent magnet powder into the mounting cavity through the opening of the mounting cavity of the preparation fixture; installing a mounting cover plate of the preparation fixture at the opening of the mounting cavity of the preparation fixture; and placing the preparation fixture on the pressing platform of a molding machine and performing a pressing operation.

[0012] Furthermore, the method for adding permanent magnet powder into the mounting cavity includes: calculating the required weight of permanent magnet powder based on the size of the annular component, and adding the required permanent magnet powder into the mounting cavity using a two-stage feeding method.

[0013] Furthermore, the method of adding the required permanent magnet powder into the mounting cavity using the two-stage feeding method includes: performing a first feeding into the mounting cavity, and ensuring that the added permanent magnet powder reaches a height tangent to the bottom of the first groove of the preparation tool; installing the positioning post of the preparation tool into the positioning hole group of the preparation tool; performing a second feeding into the mounting cavity, and scraping the permanent magnet powder in the mounting cavity.

[0014] Furthermore, after the pressing operation is completed on the tooling, the preparation method of the annular component also includes: removing the mounting plate assembly and the mounting cover plate to obtain a molded product with positioning posts; trimming the molded product with positioning posts; and after trimming, packing the molded product with positioning posts into a vacuum packaging bag for static pressure.

[0015] Furthermore, the method for preparing the annular component after applying static pressure to the molded product with the positioning post also includes: allowing the molded product with the positioning post to stand for a preset time; removing the positioning post after the stress in the molded product with the positioning post has decreased; and loading the annular component into a furnace for sintering.

[0016] The technical solution of this invention eliminates the need for subtractive manufacturing; simply adding powder to the space enclosed by the first and second grooves is sufficient. The presence of a positioning post within the cylindrical cavity facilitates the formation of a positioning hole, thereby forming the annular component. This process requires no additional material costs and boasts a high yield. Therefore, the technical solution provided by this invention solves the problem of high molding costs for annular components in the prior art. Attached Figure Description

[0017] The accompanying drawings, which form part of this application, are used to provide a further understanding of the invention. The illustrative embodiments of the invention and their descriptions are used to explain the invention and do not constitute an undue limitation of the invention. In the drawings:

[0018] Figure 1 A schematic diagram of the installation of the preparation tooling according to an embodiment of the present invention is shown;

[0019] Figure 2 A schematic diagram of the structure of the third side plate according to an embodiment of the present invention is shown;

[0020] Figure 3 A schematic diagram of the positioning post according to an embodiment of the present invention is shown;

[0021] Figure 4 An installation schematic diagram of the mounting base plate and mounting cover plate according to an embodiment of the present invention is shown.

[0022] The above figures include the following reference numerals:

[0023] 10. Mounting plate assembly; 11. First groove; 12. Mounting base plate; 13. First mounting side plate; 14. Second mounting side plate; 15. Third mounting side plate; 16. Fourth mounting side plate; 17. First positioning hole; 18. Second positioning hole; 20. Mounting cover plate; 21. Second groove; 30. Positioning post. Detailed Implementation

[0024] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0025] like Figures 1 to 4 As shown, Embodiment 1 of the present invention provides a preparation fixture for molding annular components. The preparation fixture includes a mounting plate assembly 10, a mounting cover plate 20, and a positioning post 30. The mounting plate assembly 10 has a mounting cavity for placing the powder to be molded. A first groove 11 is provided at the bottom of the mounting plate assembly 10, and a group of positioning holes is provided on the side of the mounting plate assembly 10. The mounting cover plate 20 is detachably disposed on the top of the mounting plate assembly 10, located at the opening of the mounting cavity. The mounting cover plate 20 has a second groove 21, the recess of the second groove 21 being opposite to the recess of the first groove 11 to form a cylindrical cavity. The positioning post 30 is inserted into the group of positioning holes, and the positioning post 30 is located within the cylindrical cavity.

[0026] Using the preparation fixture provided in this embodiment, subtractive manufacturing is not required; only powder needs to be added to the space enclosed by the first groove 11 and the second groove 21. Since a positioning post 30 is placed inside the cylindrical cavity, it facilitates the formation of positioning holes through the positioning post 30, thereby forming the annular component. The above process requires no additional material costs and has a high yield. Therefore, the preparation fixture provided in this embodiment can solve the technical problem of high forming costs for annular components in the prior art.

[0027] Specifically, the annular component can be of various shapes. For example, it can be an annular component where the first groove 11 and the second groove 21 are both arc-shaped grooves and the positioning post 30 is a cylinder; it can also be an annular component where the first groove 11 and the second groove 21 are square grooves and the positioning post 30 is a rectangular prism; or it can be a component where the first groove 11 and the second groove 21 are both arc-shaped grooves and the positioning post 30 is a square prism; or it can also be a component where the first groove 11 and the second groove 21 are both square grooves and the positioning post 30 is a cylinder.

[0028] Specifically, the mounting plate assembly 10 in this embodiment includes a mounting base plate 12, a first mounting side plate 13, a second mounting side plate 14, a third mounting side plate 15, and a fourth mounting side plate 16. The mounting base plate 12 has a first side, a second side, a third side, and a fourth side connected in sequence. The first mounting side plate 13 is detachably disposed on the first side of the mounting base plate 12; the second mounting side plate 14 is detachably disposed on the second side of the mounting base plate 12; the third mounting side plate 15 is detachably disposed on the third side of the mounting base plate 12; and the fourth mounting side plate 16 is detachably disposed on the fourth side of the mounting base plate 12. The mounting base plate 12, the first mounting side plate 13, the second mounting side plate 14, the third mounting side plate 15, and the fourth mounting side plate 16 form a mounting cavity. This structural design allows for the detachable installation and removal of the first, second, third, and fourth side plates, facilitating easy assembly and disassembly, and also making it convenient to remove the formed annular component after molding. During the actual molding process, to ensure the reliability of the mounting plate assembly 10, the mounting base plate 12, first mounting side plate 13, second mounting side plate 14, third mounting side plate 15, and fourth mounting side plate 16 are fastened together with fasteners. The mounting cover plate 20 is also fastened to the first mounting side plate 13, second mounting side plate 14, third mounting side plate 15, and fourth mounting side plate 16. When removing the molded part after molding, simply remove the fasteners and detach the mounting cover plate 20, first mounting side plate 13, second mounting side plate 14, third mounting side plate 15, and fourth mounting side plate 16.

[0029] In this embodiment, the positioning hole group includes a first positioning hole 17 and a second positioning hole 18, which are arranged opposite to each other. One end of the positioning post 30 is detachably disposed in the first positioning hole 17, and the other end of the positioning post 30 is detachably disposed in the second positioning hole 18. This structural arrangement facilitates stable positioning of the positioning post 30 and also facilitates its installation and removal, improving operational convenience.

[0030] Specifically, in this embodiment, there are multiple first grooves 11, which are spaced apart along the extending direction of the mounting plate assembly 10. Correspondingly, there are multiple second grooves 21, which are spaced apart along the extending direction of the mounting cover plate 20. The multiple second grooves 21 are arranged in a one-to-one correspondence with the multiple first grooves 11, and each second groove 21 forms a corresponding cylindrical cavity. With this structural arrangement, multiple annular components can be formed simultaneously using the tooling, achieving a one-to-many production process and improving production efficiency.

[0031] In this embodiment, there are multiple positioning hole groups, each corresponding to one of the multiple cylindrical cavities, with each positioning hole group located within its respective cylindrical cavity. This structural arrangement facilitates the formation of multiple annular components.

[0032] Specifically, in this embodiment, the powder to be molded is made of a magnetic material to form a ring-shaped magnetic component, and the positioning post 30 is made of a non-magnetic material. This structural arrangement avoids the influence of the positioning post 30 on the powder to be molded during the molding process, thus ensuring the stability of the magnetic properties of the ring-shaped component.

[0033] Embodiment 2 of the present invention provides a method for preparing a ring-shaped component, using the preparation fixture provided above. The method for preparing the ring-shaped component includes: installing the positioning post 30 of the preparation fixture within the positioning hole group of the preparation fixture; adding permanent magnet powder into the mounting cavity through the opening of the mounting cavity of the preparation fixture; installing the mounting cover plate 20 of the preparation fixture at the opening of the mounting cavity of the preparation fixture; and placing the preparation fixture on the pressing platform of a molding machine for pressing. This manufacturing method is easy to operate, simplifies the manufacturing steps, and improves production efficiency.

[0034] Specifically, the method for adding permanent magnet powder into the mounting cavity includes: calculating the required weight of permanent magnet powder based on the dimensions of the annular component, and then adding the required permanent magnet powder into the mounting cavity using a two-stage feeding method. This structural setup allows for precise calculation of the required weight of permanent magnet powder, avoiding the addition of too much or too little powder, thus ensuring accurate molding of the desired annular component. Specifically, a single-stage feeding method might not adequately fill the mounting cavity with permanent magnet powder, while the two-stage feeding method facilitates sufficient filling and improves the uniformity of permanent magnet powder installation.

[0035] In this embodiment, the method of adding the required permanent magnet powder into the mounting cavity using a two-stage feeding method includes: firstly feeding the mounting cavity, ensuring the added permanent magnet powder reaches a height tangent to the bottom of the first groove 11 of the preparation tool; installing the positioning post 30 of the preparation tool within the positioning hole group of the preparation tool; secondly feeding the mounting cavity and scraping the permanent magnet powder within the mounting cavity. This method avoids the situation where the permanent magnet powder cannot properly enter and fill the first groove 11 due to the influence of the positioning post 30. Instead, it allows the permanent magnet powder to fill the first groove 11 more evenly, and the two-stage feeding and scraping further improve the uniformity of the permanent magnet powder filling within the mounting cavity, thereby improving the molding uniformity of the ring-shaped component and effectively enhancing the quality of the magnetic ring-shaped component.

[0036] Specifically, during operation, the first feeding is performed into the mounting cavity, and the added permanent magnet powder is added to a height that is tangent to the bottom of the first groove 11 of the preparation tool; then the positioning post 30 of the preparation tool is installed in the positioning hole group of the preparation tool; then the second feeding is performed into the mounting cavity, and the permanent magnet powder in the mounting cavity is scraped.

[0037] Specifically, in this embodiment, after the pressing operation of the tooling is completed, the method for preparing the annular component further includes: removing the mounting plate assembly 10 and the mounting cover plate 20 to obtain a molded product with positioning posts 30; trimming the molded product with positioning posts 30; and after trimming, placing the molded product with positioning posts 30 into a vacuum packaging bag for static pressure application. This method facilitates the preparation of magnetic annular components and effectively improves the molding quality of the annular components.

[0038] Specifically, in actual operation, the mounting plate assembly 10 and the mounting cover plate 20 are first removed to obtain a molded product with positioning posts 30; then the molded product with positioning posts 30 is trimmed; after trimming, the molded product with positioning posts 30 is put into a vacuum packaging bag for static pressure.

[0039] In this embodiment, after applying static pressure to the molded product with the positioning post 30, the method for preparing the annular component further includes: allowing the molded product with the positioning post 30 to stand for a preset time; removing the positioning post 30 after the stress in the molded product with the positioning post 30 has decreased; and then loading the annular component into a furnace for sintering. This method facilitates the effective preparation of magnetic annular components and further improves the molding performance of the annular component.

[0040] In this invention, the preparation method of the annular component is more applicable, which not only realizes the direct forming of the central hole of all annular products, including annular products with a central hole diameter of less than 30 mm and an annular wall thickness of less than 5 mm, but also improves labor efficiency, and all annular products can be formed in one step.

[0041] The method for preparing ring-shaped components proposed in this invention firstly achieves direct molding of ring products, changing the old method of ring product molding, thus saving a significant amount of raw materials that would otherwise be unnecessary for the auxiliary molding of the central hole in the ring product itself. Secondly, this method enables the central hole molding of small and medium-sized products with a central hole diameter of less than 30mm and a ring wall thickness of less than 5mm, solving the problem of "eccentricity" and low yield during the molding process due to the positioning structure. Thirdly, while other related inventions can solve the central hole molding of small and medium-sized products, many methods require multiple molding processes, resulting in low work efficiency. The method of this invention, however, can mold all ring products in a single step, greatly improving the efficiency of the molding process.

[0042] When in use, place the pressing head (also the mounting base plate 12) on the forming operation platform with the side with the arc-shaped tip (the first groove 11 is an arc-shaped groove) facing upwards, and form a rectangle with the first side plate, the second side plate, the third side plate and the fourth side plate.

[0043] The positioning pin 30 is a cylindrical core. Multiple cylindrical cores are installed into the positioning hole assembly, thus forming a manual pressing mold together with the upper pressure head (mounting cover plate 20). The purpose of the positioning hole assembly is to accommodate a specially made round bar with a diameter equal to the size of the hole in the pressing blank. This round bar replaces the powder in the pressing process, reducing the weight of the pressing powder and lowering manufacturing costs. This specially made round bar, with a diameter equal to the size of the hole in the pressing blank, does not have special material requirements, as long as its strength and durability meet production requirements. However, to meet the anisotropic characteristics of sintered NdFeB magnetic powder requiring orientation during the forming process, the preferred materials are non-magnetic materials such as aluminum, copper, stainless steel, and various engineering plastics. Furthermore, to facilitate removal after pressing and before sintering, mirror polishing is the preferred processing technique.

[0044] After assembling the manual forming mold as described above, the production of products with center holes can be carried out on the manual forming press. However, since sintered NdFeB magnets are generally formed using a dry method, and the magnetic powder particles have poor flowability, a two-stage feeding method is required during the pressing process. A preferred method is as follows: the first feeding ensures the powder reaches the lower arc tangent of the mold positioning hole group in a loose state. Then, the specially made round rod mentioned earlier is placed in the mold's groove. The second feeding then begins, adding the calculated powder into the mold and scraping it to ensure even distribution within the mold cavity (installation cavity). The upper press head is then removed, with the side with the arc-shaped tip (the second groove 21 is also an arc-shaped groove structure) facing down, fitting perfectly into the mold cavity to form a closed mold structure.

[0045] The manual mold is introduced onto the pressing platform of the molding machine by mechanical or manual means for pressing. After the pressing process is completed, the manual mold is removed, and the closed mold structure is disassembled to obtain the product containing the core. The blank removed after pressing is trimmed, and the blank and the round bar are placed together in a plastic bag, vacuum-packed, and subjected to isostatic pressing. After standing for a certain period of time, the round bar is removed and placed in the furnace for sintering after the stress decreases.

[0046] The present invention will be further described below with reference to examples.

[0047] Example 3:

[0048] 1. Form a sintered NdFeB magnet blank with a diameter of Φ55mm×Φ20mm×45mm, and use the forming method of the present invention to prepare the manual assembly mold required for this specification of product.

[0049] 2. Select aluminum round bars with a central hole of Φ20-0.10-0.20mm×55-0.1-0.2mm and use them after mirror polishing.

[0050] 3. The positioning hole group of the manual forming mold can include two pairs of positioning round holes with a diameter of Φ20+0.100.00mm.

[0051] 4. After the manual mold is installed on the press and adjusted, a sintered NdFeB magnet blank with a diameter of Φ55mm×Φ20mm×45mm is formed. The first feeding ensures the powder reaches the lower arc of the positioning hole in the mold in a loose state. Then, a specially made round rod with a diameter of Φ20×55mm is placed and positioned within the mold's groove. The second feeding begins, adding the calculated powder into the mold and scraping to ensure even distribution within the mold cavity. The upper pressure head is removed, with the curved tip facing down, and fits perfectly into the mold cavity, forming a closed mold structure.

[0052] 5. The manual mold is mechanically introduced onto the pressing platform of the molding machine for pressing. After the pressing process is completed, the manual mold is removed, and the closed mold structure is disassembled to obtain the product containing the core. The pressed blank is trimmed, and then the blank and the round bar are placed together in a plastic bag, vacuum-packed, and subjected to isostatic pressing. After that, it is left to stand for another 10 hours until the stress decreases. Then, the round bar is removed and placed in the furnace for sintering.

[0053] Example 4:

[0054] 1. Form a sintered NdFeB magnet blank with a diameter of Φ25mm×Φ18mm×42mm, and use the forming method of the present invention to prepare the manual assembly mold required for this specification of product.

[0055] 2. Select a round bar with a central hole of Φ18-0.1-0.2mm×52-0.1-0.2mm made of high-polymer nylon material and use it after ordinary grinding.

[0056] 3. The positioning hole group of the manual forming mold includes three pairs of Φ18+0.100.00mm positioning round holes.

[0057] 4. After the manual mold is installed on the press and adjusted, a sintered NdFeB magnet blank with a diameter of Φ25mm×Φ18mm×42mm is formed. The first feeding ensures the powder reaches the lower arc of the circular hole in the mold's positioning hole group in a loose state. Then, three specially made round rods with a diameter of Φ18×52mm are placed and positioned within the mold's groove. The second feeding begins, adding the calculated powder into the mold and scraping to ensure even distribution within the mold cavity. The upper pressure head is removed, with the curved tip facing down, and fits perfectly into the mold cavity, forming a closed mold structure.

[0058] 5. The manual mold is mechanically introduced onto the pressing platform of the molding machine for pressing. After the pressing process is completed, the manual mold is removed, and the closed mold structure is disassembled to obtain the product containing the core. The blank removed after pressing is trimmed, and then the blank and the round bar are placed together in a plastic bag, vacuum-packed, and subjected to isostatic pressing. After that, it is left to stand for another 8 hours until the stress decreases. Then, the round bar is removed and placed in the furnace for sintering.

[0059] Example 5:

[0060] 1. Form a sintered NdFeB magnet blank with a diameter of Φ10mm×Φ4mm×40mm, and use the forming method of the present invention to prepare the manual assembly mold required for this specification of product.

[0061] 2. Select stainless steel round bars with a central hole of Φ4-0.05-0.10mm×56-0.05-0.15mm, and polish them before use.

[0062] 3. The positioning hole group of the manual forming mold includes 6 pairs of Φ10+0.080.00mm positioning round holes.

[0063] 4. After the manual mold is installed on the press and adjusted, a sintered NdFeB magnet blank with a diameter of Φ10mm×Φ4mm×40mm is formed. First, six specially made round rods with a diameter of Φ4×56mm are placed in the mold groove and positioned. Then, the powder is added to the mold, and scraping is performed to distribute the powder evenly in the mold cavity. The upper press head is removed, with the curved tip facing down, and fits into the mold cavity to form a closed mold structure.

[0064] 5. The manual mold is mechanically introduced onto the pressing platform of the molding machine for pressing. After the pressing process is completed, the manual mold is removed, and the closed mold structure is disassembled to obtain the product containing the core. The blank removed after pressing is trimmed, and then the blank and the round bar are placed together in a plastic bag, vacuum-packed, and subjected to isostatic pressing. After that, it is left to stand for another 8 hours until the stress decreases. Then, the round bar is removed and placed in the furnace for sintering.

[0065] Example 6:

[0066] 1. Form a sintered NdFeB magnet blank with a diameter of 7mm × 3mm × 50mm, and use the forming method of the present invention to prepare the manual assembly mold required for this specification of product.

[0067] 2. A round bar with a central hole of Φ3.0-0.05-0.10mm×66-0.05-0.10mm is made of aluminum alloy material and is then mirror-polished before use.

[0068] 3. The positioning hole group of the manual forming mold includes 8 pairs of positioning round holes with a diameter of 3.0 + 0.060.00 mm.

[0069] 4. After the manual mold is installed on the press and adjusted, a sintered NdFeB magnet blank with a diameter of 7mm × 3mm × 50mm is formed. First, eight specially made round rods with a diameter of 3.0 × 66mm are placed in the mold and positioned in the groove. Then, the powder is added to the mold, and scraping is performed to distribute the powder evenly in the mold cavity. The upper press head is removed, with the curved tip facing down, and fits into the mold cavity to form a closed mold structure.

[0070] 5. The manual mold is mechanically introduced onto the pressing platform of the molding machine for pressing. After the pressing process is completed, the manual mold is removed, and the closed mold structure is disassembled to obtain the product containing the core. The blank removed after pressing is trimmed, and then the blank and the round bar are placed together in a plastic bag, vacuum-packed, and subjected to isostatic pressing. After that, it is left to stand for another 4 hours until the stress decreases. Then, the round bar is removed and placed in the furnace for sintering.

[0071] As can be seen from the above description, the above embodiments of the present invention achieve the following technical effects: saving raw materials, increasing the yield of magnetic ring components, and improving work efficiency.

[0072] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to this application. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0073] Unless otherwise specifically stated, the relative arrangement, numerical expressions, and values ​​of the components and steps described in these embodiments do not limit the scope of this application. It should also be understood that, for ease of description, the dimensions of the various parts shown in the drawings are not drawn to actual scale. Techniques, methods, and devices known to those skilled in the art may not be discussed in detail, but where appropriate, such techniques, methods, and devices should be considered part of the specification. In all examples shown and discussed herein, any specific values ​​should be interpreted as merely exemplary and not as limitations. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters in the following drawings denote similar items; therefore, once an item is defined in one drawing, it need not be further discussed in subsequent drawings.

[0074] In the description of this application, it should be understood that the orientation or positional relationship indicated by directional terms such as "front, back, up, down, left, right", "horizontal, vertical, horizontal" and "top, bottom" is usually based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing this application and simplifying the description. Unless otherwise stated, these directional terms 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, and therefore should not be construed as a limitation on the scope of protection of this application; the directional terms "inner" and "outer" refer to the inner and outer contours relative to the outline of each component itself.

[0075] For ease of description, spatial relative terms such as "above," "on top of," "on the upper surface of," "above," etc., are used herein to describe the spatial positional relationship of a device or feature as shown in the figures to other devices or features. It should be understood that spatial relative terms are intended to encompass different orientations in use or operation beyond the orientation of the device as described in the figures. For example, if the device in the figures were inverted, a device described as "above" or "on top of" other devices or structures would subsequently be positioned as "below" or "under" other devices or structures. Thus, the exemplary term "above" can include both "above" and "below." The device may also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatial relative descriptions used herein will be interpreted accordingly.

[0076] Furthermore, it should be noted that the use of terms such as "first" and "second" to define components is merely for the purpose of distinguishing the corresponding components. Unless otherwise stated, the above terms have no special meaning and therefore cannot be construed as limiting the scope of protection of this application.

[0077] 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 method for preparing a ring-shaped component, characterized in that, The following preparation fixture is used to form a ring-shaped component. The preparation fixture includes: a mounting plate assembly (10) having a mounting cavity for placing the powder to be formed; a first groove (11) at the bottom of the mounting plate assembly (10) and a group of positioning holes on the side of the mounting plate assembly (10); and a mounting cover plate (20) detachably disposed on the top of the mounting plate assembly (10), located at the opening of the mounting cavity, and having a second groove (21) with the recess of the second groove (21) being connected to the top of the mounting plate assembly (10). The recesses of the first groove (11) are arranged opposite to each other to form a cylindrical cavity; a positioning post (30) is inserted into the positioning hole group and is located in the cylindrical cavity; the positioning hole group includes a first positioning hole (17) and a second positioning hole (18), the first positioning hole (17) and the second positioning hole (18) are arranged opposite to each other, one end of the positioning post (30) is detachably disposed in the first positioning hole (17), and the other end of the positioning post (30) is detachably disposed in the second positioning hole (18); the method for preparing the annular component includes: The positioning pin of the preparation tool is installed in the positioning hole group of the preparation tool; Permanent magnet powder is added into the mounting cavity through the opening of the mounting cavity of the preparation tool; The mounting cover plate of the preparation tool is installed at the opening of the mounting cavity of the preparation tool; The preparation tooling is placed on the pressing platform of the molding machine and pressing is performed. The method for adding permanent magnet powder into the mounting cavity includes: calculating the required weight of permanent magnet powder based on the size of the annular component, and adding the required permanent magnet powder into the mounting cavity using a two-stage feeding method; The method of adding the required permanent magnet powder into the mounting cavity using a two-stage feeding method includes: The installation cavity is filled with material for the first time, and the added permanent magnet powder is added to a height that is tangent to the lower arc of the circular hole of the positioning hole group of the preparation tool. The positioning pin of the preparation tool is installed in the positioning hole group of the preparation tool; A second feeding is performed into the mounting cavity, and the permanent magnet powder in the mounting cavity is scraped off.

2. The method for preparing the annular component according to claim 1, characterized in that, After the pressing operation is completed on the aforementioned tooling, the method for preparing the annular component further includes: Remove the mounting plate assembly and the mounting cover plate to obtain a molded product with the positioning post; The molded product with the positioning pin is trimmed; After trimming, the molded product with the positioning pins is placed into a vacuum packaging bag and subjected to static pressure.

3. The method for preparing the annular component according to claim 2, characterized in that, After applying static pressure to the molded product with the positioning post, the method for preparing the annular component further includes: The molded product with the positioning pin is left to stand for a preset time. Remove the positioning post after the stress inside the molded product with the positioning post has decreased; The annular component is then loaded into a furnace for sintering.

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