Amorphous nano strip magnetic core winding die

Abstract

The amorphous nano strip magnetic core winding mold comprises a first core mold and a second core mold, the first core mold and the second core mold are arranged in a sliding fit mode through a first inclined face and a second inclined face which are inclined, and clamping grooves are formed in the first core mold and the second core mold respectively. The first core mold and the second core mold are slidably sleeved with a clamping sleeve, and the inner wall of the end, close to the clamping groove, of the clamping sleeve has taper; a stripping sleeve is slidably arranged outside the clamping sleeve in a sleeving manner; a connecting shaft sleeve is fixedly connected to the second core mold and used for being connected with an external power mechanism to drive the first core mold and the second core mold to rotate synchronously. The first core mold and the second core mold are arranged in a sliding fit mode, after winding is completed, the first core mold can contract inwards in the inclined plane direction, the overall dimension of the mold is reduced, and therefore a gap is formed between the inner wall of a magnetic core and the mold, demolding resistance is greatly reduced, scratching and deformation caused by forced material pushing to a strip are avoided, and the service life of the strip is prolonged. And the product yield is obviously improved.

Description

Technical Field

[0001] This invention belongs to the field of amorphous nanoribbon technology, specifically referring to a magnetic core winding mold for amorphous nanoribbons. Background Technology

[0002] Amorphous and nanocrystalline soft magnetic alloy strips are widely used in the manufacture of magnetic cores for electronic components such as transformers and inductors due to their excellent magnetic properties. These strips are extremely thin, typically between 16μm and 30μm, and become brittle after heat treatment, placing extremely high demands on the winding and forming process.

[0003] In the process of magnetic core winding, the mold is crucial to ensuring the dimensional accuracy and appearance quality of the magnetic core. Existing amorphous nanoribbon winding molds mostly adopt an integral structure or a simple split design. Before the winding operation, the end of the ribbon needs to be fixed in the clamping groove of the mold, then clamped by the extrusion of the clamping sleeve, and finally the mold is rotated by external power to complete the winding.

[0004] However, existing technologies have the following significant shortcomings: After the winding process is completed, due to the tight winding of the nanocrystalline ribbon, the magnetic core and the mold are extremely tightly bonded. The conventional approach is to directly drive the stripper sleeve to forcibly push the magnetic core off the mold. This demolding method generates enormous friction, which can easily cause scratches, wrinkles, or even breakage in the extremely thin and brittle inner layer of the nanocrystalline ribbon, resulting in the scrapping or performance degradation of the magnetic core. In addition, during demolding with an integrated mold, the inner wall of the magnetic core is in constant contact and friction with the outer wall of the mold, resulting in high demolding resistance, which not only damages the product but also affects production efficiency. Summary of the Invention

[0005] In view of the above situation and to overcome the defects of the prior art, the present invention provides an amorphous nanoribbon magnetic core winding mold, which at least partially solves the above problems.

[0006] The technical solution adopted by this invention is as follows: This invention proposes an amorphous nanoribbon magnetic core winding mold, comprising: A first core mold and a second core mold, wherein the first core mold is provided with a first inclined surface and the second core mold is provided with a second inclined surface, the first inclined surface and the second inclined surface are slidably fitted together, and both the first core mold and the second core mold are provided with clamping grooves; A clamping sleeve is slidably fitted onto the outside of the first core mold and the second core mold, and the inner wall of the clamping sleeve near the clamping groove end is tapered; A stripping sleeve, which is slidably fitted onto the outside of the clamping sleeve; A coupling sleeve is fixedly connected to the second core mold and is used to connect with an external power mechanism to drive the first core mold and the second core mold to rotate synchronously.

[0007] Furthermore, the first core mold has a first chuck and a first shaft, the second core mold has a second chuck and a second shaft, the first inclined surface is provided on the first chuck and the first shaft, the second inclined surface is provided on the second chuck and the second shaft, and the clamping groove is symmetrically provided on the first chuck and the second chuck.

[0008] Furthermore, the end of the second shaft is provided with a limiting platform, and the first shaft is provided with a limiting groove, the limiting platform being fitted into the limiting groove.

[0009] Furthermore, the end of the first shaft is provided with a hinge seat, which is used to connect with the telescopic drive unit via a ball joint to drive the first core mold to slide along the first inclined plane and the second inclined plane.

[0010] Furthermore, the inner wall of the clamping sleeve is provided with an inner circular surface, and the inner circular surface has a taper near the end of the winding operation, which is used to gradually reduce the gap of the clamping groove when sliding towards the clamping groove.

[0011] Furthermore, the clamping sleeve is symmetrically provided with relief grooves, and the inner circular surface is provided with a concave first relief arc at a position opposite to the relief groove. The direction of the first relief arc and the relief groove is adapted to the direction of the first inclined surface, so as to avoid interference with the clamping sleeve when the first core mold slides.

[0012] Furthermore, a connecting body is embedded within the connecting sleeve, the diameter of the connecting sleeve being larger than the diameter of the connecting body, the connecting body being fixedly connected to the keyway of the second shaft of the second mandrel, and a second clearance arc is symmetrically provided within the connecting body to prevent interference with the inner hole of the connecting body when the second mandrel slides.

[0013] Furthermore, the first core mold and the second core mold are connected by a keyway sliding fit, allowing them to slide relative to each other but not rotate relative to each other.

[0014] Furthermore, the first core mold is positioned below the second core mold, so that the magnetic core can be supported by the second core mold when the first core mold retracts and slides inward.

[0015] Furthermore, after the first core mold completes its inward sliding, the stripper moves toward the ends of the first and second core molds, pushing the loosened magnetic core off the mold.

[0016] The beneficial effects of this invention are as follows: By slidingly fitting the first core mold and the second core mold together, after winding, the first core mold can shrink inward along the inclined plane, reducing the outer contour size of the mold and thus creating a gap between the inner wall of the magnetic core and the mold. At this point, the material is pushed out by the strip ejector sleeve, significantly reducing the demolding resistance and avoiding scratches and deformations to the inner layer of the strip caused by forced pushing, thus significantly improving product yield. Simultaneously, the tapered design of the clamping sleeve's inner wall stably clamps the end of the strip before winding, ensuring winding accuracy; the connecting sleeve is fixedly connected to the second core mold, ensuring synchronous rotation and structural integrity. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the structure of the amorphous nanoribbon magnetic core winding mold according to an embodiment of the present invention; Figure 2 for Figure 1 Exploded view; Figure 3 for Figure 1 A sectional view; Figure 4 This is a diagram showing the state of the first and second core dies during winding. Figure 5 This is a diagram showing the state of the first and second core molds during unloading. Figure 6 for Figure 4 Exploded view; Figure 7 This is a schematic diagram of the clamping sleeve. Figure 8 This is a schematic diagram of the coupling sleeve.

[0018] Among them, 1. stripper sleeve, 2. clamping sleeve, 3. first core mold, 4. second core mold, 5. connecting sleeve, 6. first chuck, 7. first shaft body, 8. second chuck, 9. second shaft body, 10. clamping groove, 11. first inclined surface, 12. second inclined surface, 13. limiting platform, 14. limiting groove, 15. hinge seat, 16. clearance groove, 17. inner circular surface, 18. first clearance arc, 19. connecting body, 20. second clearance arc.

[0019] The accompanying drawings are provided to further illustrate the invention and form part of the specification. They are used together with the embodiments of the invention to explain the invention and do not constitute a limitation thereof. Detailed Implementation

[0020] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the scope of protection of the present invention.

[0021] In the description of this invention, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and 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. Therefore, they should not be construed as limitations on this invention.

[0022] like Figures 1 to 8 As shown, an embodiment of the present invention provides an amorphous nanoribbon magnetic core winding mold, including a first core mold 3, a second core mold 4, a clamping sleeve 2, a stripping sleeve 1, and a connecting sleeve 5.

[0023] like Figure 1 , Figure 2 , Figure 4 As shown, the first core mold 3 and the second core mold 4 are slidably fitted together via an inclined first slope 11 and a second slope 12. Specifically, as... Figure 2 , Figure 6 As shown, the first core mold 3 has a first chuck 6 and a first shaft 7, and the second core mold 4 has a second chuck 8 and a second shaft 9. A first inclined surface 11 is provided on the first chuck 6 and the first shaft 7, and a second inclined surface 12 is provided on the second chuck 8 and the second shaft 9. The first core mold 3 and the second core mold 4 are connected by a keyway sliding fit (not shown in the figure), allowing them to slide relative to each other but not rotate relative to each other. During the winding operation, the ends of the first core mold 3 and the second core mold 4 are aligned and fitted together, forming a cylindrical shape.

[0024] Both the first core mold 3 and the second core mold 4 are provided with clamping grooves 10, such as Figure 2 , Figure 6 As shown, the clamping grooves 10 are symmetrically arranged on the first clamp 6 and the second clamp 8, and are used to clamp the ends of the amorphous nanoribbon before the winding operation.

[0025] like Figure 1 , Figure 2 , Figure 3 and Figure 7As shown, the clamping sleeve 2 is slidably fitted onto the outside of the first core mold 3 and the second core mold 4. The inner wall of the clamping sleeve 2 is provided with an inner circular surface 17, and the inner circular surface 17 has a taper at one end near the clamping groove 10 (i.e., the end near the winding operation). Before the winding operation, the clamping sleeve 2 slides towards the clamping groove 10. Due to the existence of its inner wall taper, the inner hole diameter becomes smaller closer to the end, thereby applying an inward squeezing force to the clamping groove 10, making the gap of the clamping groove 10 gradually smaller, and clamping and fixing the end of the amorphous strip.

[0026] The clamping sleeve 2 is symmetrically provided with relief grooves 16, and the inner circular surface 17 is provided with a concave first relief arc 18 at a position opposite to the relief grooves 16. The directions of the first relief arc 18 and the relief grooves 16 are adapted to the direction of the first inclined surface 11, so as to avoid interference with the clamping sleeve 2 when the first core mold 3 slides in the future.

[0027] like Figures 1 to 3 As shown, the stripper sleeve 1 is slidably fitted onto the outside of the clamping sleeve 2. After the winding operation is completed, the stripper sleeve 1 is used to push the magnetic core off the mold.

[0028] like Figures 1 to 3 , Figure 8 As shown, the coupling sleeve 5 is fixedly connected to the second core mold 4, and is used to connect to an external power mechanism to drive the first core mold 3 and the second core mold 4 to rotate synchronously. Specifically, as... Figure 8 As shown, a connecting body 19 is fitted inside the connecting sleeve 5, and the diameter of the connecting sleeve 5 is larger than the diameter of the connecting body 19. The connecting body 19 is fixedly connected to the keyway of the second shaft 9 of the second core mold 4, and a second clearance arc 20 is symmetrically provided inside the connecting body 19 to avoid interference with the inner hole of the connecting body 19 when the second core mold 4 slides.

[0029] like Figure 2 , Figure 6 As shown, in order to control the sliding stroke of the first core mold 3 relative to the second core mold 4, the end of the second shaft 9 is provided with a limiting platform 13, and the first shaft 7 is provided with a limiting groove 14. The limiting platform 13 is fitted into the limiting groove 14 and can slide within the limiting groove 14.

[0030] like Figure 2 , Figure 6 As shown, a hinge seat 15 is provided at the end of the first shaft 7 to drive the first core mold 3 to slide. The hinge seat 15 is used to connect with the telescopic drive unit (such as a cylinder, hydraulic cylinder, or electric push rod, not shown in the figure) via a ball joint to drive the first core mold 3 to slide along the first inclined plane 11 and the second inclined plane 12. Due to the ball joint connection, when the first core mold 3 slides and its axis changes, the axis of the telescopic drive unit can remain relatively fixed.

[0031] The working principle of the embodiments of the present invention will be described in detail below.

[0032] Before the winding operation, the ends of the first mandrel 3 and the second mandrel 4 are aligned and fitted together to form a complete cylindrical shape. The end of the amorphous nanoribbon is then fed into the clamping grooves 10 on the first chuck 6 and the second chuck 8. Subsequently, the clamping sleeve 2 is driven to slide towards the clamping groove 10 (i.e., towards the winding end). The taper of the inner wall of the clamping sleeve 2 applies an inward squeezing force to the clamping groove 10 during the sliding process, gradually reducing the gap in the clamping groove 10, thereby firmly clamping the end of the amorphous ribbon.

[0033] The external power mechanism is activated, and power is transmitted to the second core mold 4 through the coupling sleeve 5. The second core mold 4 drives the first core mold 3 to rotate synchronously through the keyway, thus initiating the winding operation. During the winding process, the amorphous ribbon is continuously wound around the outside of the first core mold 3 and the second core mold 4 to form a magnetic core.

[0034] After the winding operation is completed, demolding is required. First, the telescopic drive unit connected to the hinge 15 is driven to pull the first core mold 3 inward relative to the second core mold 4 along the direction of the first inclined plane 11 and the second inclined plane 12. In the initial stage of sliding, the first core mold 3 generates friction with the inner wall of the magnetic core, but this friction only comes from half of the mold surface. As the first core mold 3 continues to slide, the outer contour size of the mold gradually decreases, and a gap appears between the inner wall of the magnetic core and the first core mold 3, thereby loosening the magnetic core and the entire mold.

[0035] It should be noted that in this embodiment, the first core mold 3 is positioned below the second core mold 4. During the inward sliding process of the first core mold 3, the magnetic core can be reliably supported by the second core mold 4, preventing the magnetic core from falling or deforming due to gravity.

[0036] As the first core mold 3 slides along the inclined plane, the positions of its axis and edges change. At this time, the clearance groove 16 and the concave first clearance arc 18 on the clamping sleeve 2 provide clearance space for the first core mold 3, preventing interference between the first core mold 3 and the clamping sleeve 2. Simultaneously, the second clearance arc 20 on the inner connecting body 19 of the connecting sleeve 5 also provides clearance space for the sliding of the second core mold 4, preventing interference.

[0037] After the first core mold 3 completes its inward sliding and the magnetic core becomes loose from the mold, the drive stripper sleeve 1 moves towards the ends of the first core mold 3 and the second core mold 4, easily pushing the loosened magnetic core off the mold and completing the demolding operation.

[0038] In summary, the embodiments of the present invention reduce the mold outline size by sliding the first core mold 3 and the second core mold 4 together and shrinking the first core mold 3 before demolding, thereby forming a gap between the inner wall of the magnetic core and the mold, which greatly reduces the demolding resistance, avoids scratches and deformation of the amorphous nanoribbon material caused by forced demolding, and significantly improves product yield and production efficiency.

[0039] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0040] The present invention and its embodiments have been described above. This description is not restrictive, and the accompanying drawings are only one embodiment of the present invention; the actual structure is not limited thereto. In conclusion, if those skilled in the art are inspired by this description and design similar structures and embodiments without departing from the spirit of the invention, such designs should fall within the protection scope of the present invention.

Claims

1. A winding mold for amorphous nanoribbon magnetic cores, characterized in that, include: The first core mold (3) and the second core mold (4) are provided with a first inclined surface (11) and a second inclined surface (12). The first inclined surface (11) and the second inclined surface (12) are slidably fitted together, and both the first core mold (3) and the second core mold (4) are provided with clamping grooves (10). The clamping sleeve (2) is slidably sleeved on the outside of the first core mold (3) and the second core mold (4), and the inner wall of the clamping sleeve (2) near the clamping groove (10) is tapered; A stripping sleeve (1) is slidably fitted onto the outside of the clamping sleeve (2); A coupling sleeve (5) is fixedly connected to the second core mold (4) and is used to connect with an external power mechanism to drive the first core mold (3) and the second core mold (4) to rotate synchronously.

2. The amorphous nanoribbon magnetic core winding mold according to claim 1, characterized in that: The first core mold (3) has a first chuck (6) and a first shaft (7), the second core mold (4) has a second chuck (8) and a second shaft (9), the first inclined surface (11) is provided on the first chuck (6) and the first shaft (7), the second inclined surface (12) is provided on the second chuck (8) and the second shaft (9), and the clamping groove (10) is symmetrically provided on the first chuck (6) and the second chuck (8).

3. The amorphous nanoribbon magnetic core winding mold according to claim 2, characterized in that: The end of the second shaft (9) is provided with a limiting platform (13), and the first shaft (7) is provided with a limiting groove (14). The limiting platform (13) is fitted into the limiting groove (14).

4. The amorphous nanoribbon magnetic core winding mold according to claim 2, characterized in that: The first shaft (7) has a hinge seat (15) at its end. The hinge seat (15) is used to connect with the telescopic drive unit by a ball joint to drive the first core mold (3) to slide along the first inclined surface (11) and the second inclined surface (12).

5. The amorphous nanoribbon magnetic core winding mold according to claim 1, characterized in that: The inner wall of the clamping sleeve (2) is provided with an inner circular surface (17), which has a taper near the end of the winding operation, so as to gradually reduce the gap of the clamping groove (10) when sliding towards the clamping groove (10).

6. The amorphous nanoribbon magnetic core winding mold according to claim 5, characterized in that: The clamping sleeve (2) is symmetrically provided with relief grooves (16), and the inner circular surface (17) is provided with a concave first relief arc (18) opposite to the relief groove (16). The directions of the first relief arc (18) and the relief groove (16) are adapted to the direction of the first inclined surface (11) to avoid interference with the clamping sleeve (2) when the first core mold (3) slides.

7. The amorphous nanoribbon magnetic core winding mold according to claim 1, characterized in that: The connecting sleeve (5) is fitted with a connecting body (19). The diameter of the connecting sleeve (5) is larger than the diameter of the connecting body (19). The connecting body (19) is fixedly connected to the keyway of the second shaft (9) of the second core mold (4). The connecting body (19) is symmetrically provided with a second clearance arc (20) to avoid interference with the inner hole of the connecting body (19) when the second core mold (4) slides.

8. The amorphous nanoribbon magnetic core winding mold according to claim 1, characterized in that: The first core mold (3) and the second core mold (4) are connected by a keyway sliding fit, so that they can only slide relative to each other and cannot rotate relative to each other.

9. The amorphous nanoribbon magnetic core winding mold according to claim 1, characterized in that: The first core mold (3) is positioned below the second core mold (4) so ​​that the magnetic core can be supported by the second core mold (4) when the first core mold (3) slides inward.

10. The amorphous nanoribbon magnetic core winding mold according to claim 1, characterized in that: After the first core mold (3) completes its inward sliding, the stripper sleeve (1) moves toward the ends of the first core mold (3) and the second core mold (4) to push the loosened magnetic core off the mold.

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