Shaping tool for nanocrystalline runway-shaped magnetic core

Abstract

The utility model relates to a shaping tool for a nanocrystalline runway-shaped magnetic core, which comprises a runway-shaped inner die with an annular structure and a rectangular outer die with an annular detachable structure, and a baffle is movably arranged on the inner wall of the long edge of the outer die. And the inner die is movably arranged in the ring of the outer die, and a gap for placing a magnetic core is formed between the inner die and the baffle and the inner wall of the outer die. The magnetic core is convenient to operate, heat dissipation of the magnetic core is facilitated, and adverse effects on the performance of the magnetic core are avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of magnetic core preparation, in particular to a shaping tool for a nanocrystalline racetrack-shaped magnetic core. Background Art

[0002] Nanocrystalline soft magnetic alloy Fe 73.5 Cu1Nb3Si 15.5 B7 has excellent comprehensive soft magnetic properties, such as high saturation magnetic induction intensity, low coercive force and loss, and excellent high-frequency characteristics. Magnetic cores made of nanocrystalline alloys help optimize the design of inductive components in power electronic systems, reduce the weight and size of components, and improve the efficiency of the overall system. When preparing nanocrystalline magnetic cores, shaping is an important step in determining the performance and size of the magnetic core. During the shaping process, it is necessary to select a shaping tool that matches the magnetic core, and then shape it under specific heat treatment conditions and perform a series of processes to obtain the target magnetic core. Since the nanocrystalline magnetic core needs to be obtained through a heat treatment process, significant crystallization heat release will occur during the heat treatment process. If the shaping tool design is unreasonable, it is easy to cause incomplete stress release, resulting in deformation of the magnetic core, and untimely heat release leading to overburning, which seriously affects the performance and yield of the magnetic core. In addition, the shaping tool also needs to consider factors such as ease of operation and quality consistency during mass production.

[0003] At present, the industry generally uses an inner mold composed of three sub-molds, left, middle and right, to make the racetrack-shaped magnetic core. The inner mold is wedged into the inner circle of the magnetic core by a nylon hammer (such as the shaping tool in patent CN 110931238 A). When such a shaping tool is used, when the magnetic core is large, the tool is relatively heavy (especially the inner mold), and manual operation is inconvenient; and its inner mold, due to its solid structure, cannot dissipate heat in time during the crystallization process of nanocrystal heat treatment, causing the local temperature of the magnetic core to be too high, which has an adverse effect on the performance of the magnetic core. Utility Model Content

[0004] In view of the existing deficiencies, the utility model provides a shaping tool for a nanocrystalline racetrack-shaped magnetic core.

[0005] The technical solution adopted by the utility model to solve its technical problems is: a shaping tool for a nanocrystalline racetrack-shaped magnetic core, comprising an inner mold with a racetrack-shaped ring structure and an outer mold with a rectangular ring-shaped detachable structure, wherein a baffle is movably provided on the inner wall of the long side of the outer mold, and the inner mold is movably installed in the ring of the outer mold and is separated from the baffle and the inner wall of the outer mold by a gap for placing the magnetic core.

[0006] Preferably, the outer mold includes a front side plate and a rear side plate which are arranged in parallel and spaced apart, and a left connecting column and a right connecting column which are detachably installed at the left and right ends between the front side plate and the rear side plate.

[0007] Preferably, two of the left connecting column and the right connecting column are arranged parallel to each other in the vertical direction, and each of the left connecting column and the right connecting column is detachably connected to the front side plate and the rear side plate.

[0008] Preferably, the left connecting column and the right connecting column are both arranged adjacent to the edges of the front side plate and the rear side plate.

[0009] Preferably, the ends of the left connecting column and the right connecting column are both provided with threaded holes, and the front side panel and the rear side panel are both provided with side panel through holes. The left connecting column and the right connecting column are detachably connected to the front side panel and the rear side panel by bolts that pass through the side panel through holes and are threaded in the threaded holes.

[0010] Preferably, ventilation holes are provided on the side walls and / or baffles of the outer mold.

[0011] Preferably, a slit is provided on the side wall of the inner mold.

[0012] Preferably, two baffles are provided and are correspondingly arranged on two inner walls in the long side direction of the outer mold.

[0013] The beneficial effects of the utility model are as follows: the utility model has a simple structure, and the inner mold is arranged as a runway-shaped ring structure, which is convenient for shaping the inner ring of the runway-shaped magnetic core, and changes the solid structure of the traditional inner mold. While facilitating operation, it is also beneficial to the heat dissipation during the crystallization process of nanocrystal heat treatment. The outer mold with a rectangular ring-shaped detachable structure and a baffle movably arranged on its inner wall facilitate the shaping of the outer ring of the runway-shaped magnetic core, and it is also convenient to disassemble the outer mold after shaping. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 This is a schematic structural diagram of the first embodiment of the utility model in which the magnetic core is installed on the shaping tool;

[0015] Figure 2 This is a structural schematic diagram of the second embodiment of the utility model in which the magnetic core is installed on the shaping tool;

[0016] Figure 3 It is a structural schematic diagram of the inner mold of the third embodiment of the utility model;

[0017] Names and serial numbers of parts in the figure: 1-inner mold 10-slit 2-outer mold 20-front side plate 21-rear side plate 22-left connecting column 23-right connecting column 24-ventilation hole 3-baffle 4-magnetic core 5-bolt. DETAILED DESCRIPTION

[0018] In order to more clearly illustrate the purpose, technical solutions and advantages of the embodiments of the utility model, the utility model will be further described in conjunction with the accompanying drawings and embodiments below, and a clear and complete description will be given. Obviously, the described embodiments are partial embodiments of the utility model, rather than all embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work belong to the protection scope of the utility model. In addition, the directional terms mentioned in the utility model, such as "up", "down", "front", "back", "left", "right", "inside", "outside", etc., are only referenced to the directions of the attached diagrams. The directional terms used are for better and clearer explanation and understanding of the utility model, rather than indicating or implying the orientation that the utility model must have, and therefore cannot be understood as a limitation on the utility model.

[0019] The utility model is implemented as follows Figure 1 The first embodiment shown in Figure 2The second embodiment shown in the figure is a shaping tool for a nanocrystalline racetrack-shaped magnetic core, comprising an inner mold 1 with a racetrack-shaped annular structure and an outer mold 2 with a rectangular annular detachable structure, that is, the inner mold 1 is a hollow structure. After the inner mold 1 is placed in the wound annular magnetic core 4, it is beneficial to the heat dissipation of the magnetic core 4 during the heat treatment process. The racetrack-shaped structure of the inner mold 1 is convenient for shaping the inner ring of the magnetic core 4, that is, the inner side wall, when preparing the racetrack-shaped magnetic core; and the detachable structure of the outer mold 2 means that it can be assembled when in use. The outer mold 2 is provided with a baffle 3 on the inner wall of the long side of the outer mold 2, and the inner mold 1 is movably installed in the ring of the outer mold 2 and is separated from the baffle 3 and the inner wall of the outer mold 2 by a gap for placing the magnetic core 4. The gap is used to place the annular magnetic core 4. There is no need to set a connecting structure between the baffle 3 and the outer mold 2. It only needs to be inserted into the outer mold 2. 2 and fit with the inner wall of the outer mold 2. When in use, first put the inner mold 1 into the inner ring of the wound annular magnetic core 4. At this time, the inner mold 1 is installed in the inner ring of the annular magnetic core 4 with interference fit. Then, place them in the assembled ring of the outer mold 2. At this time, there is a gap between the outer wall of the annular magnetic core 4 and the inner wall of the outer mold 2. Then, insert the baffle 3 into the gap and abut against the inner wall of the outer mold 2 and the outer side wall of the annular magnetic core 4, so as to shape the outer side wall of the annular magnetic core 4. The baffle 3 can be set to have different thicknesses, and then the baffle of corresponding thickness can be inserted according to the size of the gap for easy use. In order to maintain the balance of force on the magnetic core 4 during the process of inserting the baffle 3, two baffles 3 are provided and are correspondingly arranged on the two inner walls in the long side direction of the outer mold 2. One baffle 3 corresponds to the long side of the front end of the outer mold 2, that is, the front side plate 20, and the other baffle 3 corresponds to the long side of the rear end of the outer mold 2, that is, the rear side plate 21. In this way, pressure can be applied to the front and rear sides of the magnetic core 4 to shape it at the same time.

[0020] Further improvements, such as Figure 1 and Figure 2As shown in the figure, for the detachable structure of the outer mold 2, the outer mold 2 includes a front side plate 20 and a rear side plate 21 arranged in parallel and spaced apart, and a left connecting column 22 and a right connecting column 23 detachably installed at the left and right ends between the front side plate 20 and the rear side plate 21. The front side plate 20 and the rear side plate 21 are both flat cubic side plates and are arranged vertically. The front end of the left connecting column 22 is connected to the left end of the rear surface of the front side plate 20, and the rear end is connected to the left end of the front surface of the rear side plate 21. The front end of the right connecting column 23 is connected to the rear of the front side plate 20. The right end of the surface, the rear end is connected to the right end of the front surface of the rear side plate 21, so that the front side plate 20, the rear side plate 21, the left connecting column 22 and the right connecting column 23 form a rectangle, the front side plate 20 and the rear side plate 21 form the long side of the rectangle, and the detachable assembly of the left connecting column 22 and the right connecting column 23 and the front and rear side plates facilitates the demoulding of the runway-shaped magnetic core 4 and the outer mold 2 after the shaping is completed; the left connecting column 22 and the right connecting column 23 use connecting columns of the same shape and structure, and in order to meet the shaping of runway-shaped magnetic cores 4 of different sizes, The left connecting post 22 and the right connecting post 23 can be arranged as connecting post groups with different lengths, and all the connecting posts in a connecting post group have the same length, so that a rectangular outer mold 2 with different widths can be formed; and in order to make the structure after the connection between the left and right connecting posts and the front and rear side panels stable, two left connecting posts 22 and right connecting posts 23 are arranged parallel and spaced in the vertical direction, and each left connecting post 22 and right connecting post 23 is detachably connected to the front side panel 20 and the rear side panel 21, that is, the left connecting post Two left connecting posts 22 are provided, and two right connecting posts 23 are also provided. The two left connecting posts 22 are correspondingly connected to the upper and lower parts of the left ends of the front and rear side plates, and the two right connecting posts 23 are correspondingly connected to the upper and lower parts of the right ends of the front and rear side plates; the left connecting posts 22 and the right connecting posts 23 are both provided adjacent to the edges of the front side plate 20 and the rear side plate 21, and at the positions adjacent to the edges, the edges of the front side plate 20 and the rear side plate 21 will not warp after being subjected to force during the shaping process, thereby maintaining the balanced force on the entire side plate, and thus ensuring the stability of the outer ring structure of the magnetic core 4. As for the detachable structure of the left connecting column 22 and the right connecting column 23 with the front side plate 20 and the rear side plate 21, if a threaded connection structure is adopted, the ends of the left connecting column 22 and the right connecting column 23 are provided with threaded holes (not shown in the figure), and the front side plate 20 and the rear side plate 21 are provided with side plate through holes (not shown in the figure). The side plate through holes on the front side plate 20 are correspondingly set at the left and right ends of the front side plate 20, and the side plate through holes on the rear side plate 21 are correspondingly set at the left and right ends of the rear side plate 21. The corresponding side plate through holes on the front and rear side plates are at the same height, thus ensuring that the left connecting column 22 and the right connecting column 23 can be in a horizontal state after connection to maintain the stability of the structure. The left connecting column 22 and the right connecting column 23 are detachably connected to the front side plate 20 and the rear side plate 21 by bolts 5 that pass through the side plate through holes and are threadedly connected to the threaded holes. Such a connection structure is simple and easy to operate.

[0021] Further improvements, such as Figure 2 As shown in the figure, vent holes 24 are arranged on the side wall and / or the baffle of the outer mold 2, that is, the vent holes 24 are arranged on the side wall or the baffle of the outer mold 2 alone, or the vent holes 24 are arranged on the side wall and the baffle of the outer mold 2 at the same time, and the vent holes 24 are used to accelerate heat dissipation.

[0022] Further improvements, such as Figure 3 In the third embodiment shown in the figure, a slit 10 is provided on the side wall of the inner mold 1, and the structures of other components are the same as those in the first embodiment, which facilitates the demoulding of the magnetic core on the inner mold 1 after heat treatment and can avoid the phenomenon of "locking" of the magnetic core due to shrinkage after heat treatment.

[0023] Although the utility model has been described in detail above with general descriptions and specific implementation schemes, it is obvious to those skilled in the art that some modifications or improvements can be made to the utility model. Therefore, these modifications or improvements made without departing from the spirit of the utility model are within the scope of protection claimed by the utility model.

Claims

1. A shaping tool for a nanocrystalline racetrack-shaped magnetic core, characterized in that: The invention comprises an inner mould with a racetrack-shaped annular structure and an outer mould with a rectangular annular detachable structure. The outer mould has a baffle movably arranged on the inner wall of the long side. The inner mould is movably installed in the ring of the outer mould and is separated from the baffle and the inner wall of the outer mould by a gap for placing the magnetic core.

2. The shaping tool for the nanocrystalline racetrack-shaped magnetic core according to claim 1, characterized in that The outer mold includes a front side plate and a rear side plate which are arranged in parallel and spaced apart, and a left connecting column and a right connecting column which are detachably installed at the left and right ends between the front side plate and the rear side plate.

3. The shaping tool for the nanocrystalline racetrack-shaped magnetic core according to claim 2, characterized in that : Two of the left connecting column and the right connecting column are arranged parallel to each other in the vertical direction, and each of the left connecting column and the right connecting column is detachably connected to the front side plate and the rear side plate.

4. The shaping tool for the nanocrystalline racetrack-shaped magnetic core according to claim 2 or 3, characterized in that The left connecting column and the right connecting column are both arranged adjacent to the edges of the front side plate and the rear side plate.

5. The shaping tool for the nanocrystalline racetrack-shaped magnetic core according to claim 2 or 3, characterized in that : The ends of the left connecting column and the right connecting column are both provided with threaded holes, and the front side plate and the rear side plate are both provided with side plate through holes. The left connecting column and the right connecting column are detachably connected to the front side plate and the rear side plate by bolts that pass through the side plate through holes and are threaded in the threaded holes.

6. The shaping tool for the nanocrystalline racetrack-shaped magnetic core according to claim 1, characterized in that Ventilation holes are arranged on the side wall and / or the baffle plate of the outer mold.

7. The shaping tool for the nanocrystalline racetrack-shaped magnetic core according to claim 1, characterized in that : A slit is arranged on the side wall of the inner mold.

8. The shaping tool for the nanocrystalline racetrack-shaped magnetic core according to claim 1, characterized in that : There are two baffles and they are correspondingly arranged on the two inner walls in the long side direction of the outer mold.

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