Pressing device based on the machining of an inductor core

Abstract

The application discloses a pressurizing forming equipment based on an inductor magnetic core processing and relates to the technical field of inductor magnetic core forming. The pressurizing forming equipment specifically comprises a forming table and a pressurizing assembly. The pressurizing assembly is installed on the top beam of the forming table, and the top of the forming table is movably connected with a multi-station deformation mechanism. The application adopts an eight-station circulation system, divides the rotating table into five functional areas of pressing, discharging, material supplementing, calibrating and material mixing, cooperates with the transmission combination of the toothless sleeve and the spiral feeding shaft, realizes automatic quantitative supplement of magnetic powder, and when the rotating table rotates to the material supplementing area, the tooth pattern of the toothless sleeve is engaged with the tooth head at the end of the spiral feeding shaft, the spiral rod is driven to accurately convey the magnetic powder in the temporary storage box to the forming cavity. The structure reduces the filling error of the magnetic powder, improves the production efficiency compared with the traditional equipment, and completely eliminates the quality fluctuation caused by manual material supplementing.

Description

Technical Field

[0001] This invention relates to the field of inductor core forming technology, specifically to pressure forming equipment based on inductor core processing. Background Technology

[0002] Pressure molding equipment for inductor core processing is a key piece of equipment in the field of electronic component manufacturing. Technological development has always revolved around improving production efficiency, optimizing molding accuracy, and reducing manual intervention.

[0003] Traditional magnetic core pressing molding equipment mostly adopts a single-station or simple multi-station structure. It uses a cylinder to drive the pressure head to press the magnetic powder, and uses a straight scraping method to scrape off excess filling powder. This kind of operation cannot achieve compaction of the magnetic core in the mold. Uneven filling of magnetic powder causes differences in internal porosity after pressing, which increases DC resistance and reduces saturation current capability. As mentioned in the patent with publication number CN120236879A, the molding quality is improved by combining a cylinder with a cleaning mechanism, but it is still limited to the traditional single pressing mode and cannot solve the problem of density uniformity of complex shaped magnetic cores.

[0004] To address this, we propose a pressure molding equipment based on inductor core processing. Summary of the Invention

[0005] The purpose of this invention is to provide a pressure forming device based on inductor core processing, thereby solving the problems mentioned in the background art.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a pressure forming equipment based on inductor core processing, comprising a forming table and a pressure assembly, wherein the pressure assembly is mounted on the top crossbeam of the forming table, and a multi-station deformation mechanism is movably connected to the top of the forming table;

[0007] The multi-station deformation mechanism includes a turntable movably connected to the top of the forming table, a material storage cylinder is provided on the top of the turntable, a rotating shaft is provided at the bottom of the turntable, and the bottom of the rotating shaft is movably connected to the inner wall of the forming table through a bearing. A lower mold is evenly fixed on the top of the turntable by bolts, and a material shell is fixedly connected to the bottom of the lower mold and located on the turntable.

[0008] A temporary storage box is welded and fixed to the side of the material shell. A connecting pipe is fixed to the side of the temporary storage box. One side of the connecting pipe is fixed to the inner wall of the turntable. An outer sleeve is slidably connected to the lower mold. An inner shaft is slidably connected inside the outer sleeve. A support sleeve and a support tube are provided inside the forming table and at the bottom of the outer sleeve and the inner shaft. The support tube is fixedly connected to the support sleeve with a gap. The bottom of the outer sleeve abuts against the top of the support sleeve. The bottom of the inner shaft abuts against the top of the support tube.

[0009] Furthermore, a fixing sleeve is fitted inside the forming table and located on the outer wall of the rotating shaft, and a toothed sleeve is fitted on the outer wall of the fixing sleeve.

[0010] Furthermore, a spiral feeding shaft is movably connected inside the connecting pipe on the turntable side. The spiral feeding shaft is fitted with a toothed head on the inner side of the turntable. The toothed head is engaged with the toothed sleeve. The other side of the spiral feeding shaft extends into the temporary storage box.

[0011] Furthermore, the inner wall of the storage cylinder at the top of the turntable is provided with multiple sets of guide pipes, and the end of the guide pipe is connected to the storage cylinder, while the other end of the guide pipe is connected to a corresponding connecting pipe.

[0012] Furthermore, the temporary storage box at the bottom of the turntable is connected to the material shell, and a weighing and discharging assembly is installed inside the temporary storage box. The weighing and discharging assembly consists of a front-end weight sensor, a controller, and an electric control valve, which is installed on the pipe at the bottom of the temporary storage box.

[0013] Furthermore, a pneumatic platform is slidably connected to the side wall of the crossbeam at the top of the forming table, and a baffle is fixed to the bottom of the pneumatic platform by bolts.

[0014] The pressure forming method for machining the inductor core is as follows:

[0015] Rotary weighing and feeding, accompanied by the motor at the bottom of the forming table driving the rotating shaft to rotate, the spiral feeding shaft located on the connecting pipe at the bottom of the turntable rotates, so that the end tooth of the spiral feeding shaft contacts the toothed side of the missing tooth sleeve. As the turntable rotates, the spiral feeding shaft rotates, driving the magnetic core powder stored in the storage cylinder to enter the temporary storage box along the connecting pipe.

[0016] Then the turntable continues to rotate, causing the tooth head to disengage from the toothed side of the missing tooth sleeve. At the same time as the feeding stops, the weighing and discharging component on the temporary storage box starts to work. Based on the weight of the magnetic core powder discharged into the temporary storage box, the bottom port valve is opened to discharge the excess magnetic core powder.

[0017] The turntable rotates again to the gap between the support sleeve and the support tube. The inner shaft and outer sleeve in the shell slide downwards, the gap between the temporary storage box and the shell opens, and the magnetic core powder after weighing automatically slides into the groove constructed by the inner shaft and outer sleeve for storage. At the same time, when the inner shaft moves on the support tube, it contacts the protrusions on its surface and generates vibration, thus completing the compaction of the magnetic core powder.

[0018] Finally, as the inner shaft and outer sleeve are reset on the support sleeve and support tube, the entire turntable moves to the stamping station. The pressurizing component drives the upper mold to contact the cavity formed in the lower mold, completing the extrusion molding of the magnetic core powder. As the turntable rotates further, the outer sleeve contacts the protrusion on the surface of the support sleeve, pushing the formed magnetic core out of the lower mold and automatically discharging it under the interception of the set baffle.

[0019] Compared with the prior art, the beneficial effects of the present invention are:

[0020] In this invention, a multi-station collaborative operation is adopted. Through the rotation design of the turntable, the magnetic core forming process is divided into five functional areas: feeding, weighing and calibration, vibration and mixing, pressing and molding, and automatic discharge. This enables continuous cyclic production. In the feeding area, the screw feeding shaft and the toothed sleeve mesh and automatically transport the powder in the storage cylinder to the temporary storage box. In the calibration area, the weighing and discharging component monitors the weight of the powder in real time and discharges excess powder through an electronically controlled valve, ensuring consistent filling quality each time. This fundamentally solves the problem of magnetic core density differences caused by uneven powder in traditional processes. The functional areas are seamlessly connected, reducing manual intervention and significantly improving production efficiency.

[0021] In this invention, the compaction and ejection structure design ensures molding quality and reduces losses. In the material mixing zone, the inner shaft contacts the protrusions on the surface of the support tube as the turntable rotates, generating high-frequency micro-vibrations. This ensures that the powder is uniformly compacted before molding, eliminating internal pores and improving the core's structural density and electromagnetic performance. In the discharge zone, the protrusion design of the support sleeve precisely controls the upward movement of the outer sleeve, smoothly ejecting the molded core from the lower mold. Combined with the baffle adjusted by the pneumatic table, the inclined guidance and automatic collection of the core are achieved, avoiding core breakage or mold damage caused by traditional ejection. In the material mixing zone, the stepped inner groove structure formed by the inner shaft and outer sleeve prevents the powder from flowing back into the temporary storage box during transfer, ensuring accurate powder weighing. This fully automated production line design replaces the traditional single-pressing method, significantly reducing production costs while improving product yield. It is suitable for large-scale, high-quality core production. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the overall structure of the pressure forming equipment for processing inductor cores according to the present invention;

[0023] Figure 2 This is a top view schematic diagram of the pressure forming equipment for processing the inductor core of the present invention;

[0024] Figure 3 This is a schematic diagram of the installation structure of multiple lower molds on the top of the turntable of the present invention;

[0025] Figure 4 This is a schematic diagram of the installation structure of the inner turntable and support sleeve in the forming table of the present invention;

[0026] Figure 5 This is a schematic diagram of the overall structure of the multi-station deformation mechanism of the present invention;

[0027] Figure 6 This is a schematic diagram of the temporary storage box of the present invention connected to the turntable via a connecting pipe;

[0028] Figure 7 This is a schematic diagram of the installation of the outer sleeve and inner shaft in the bottom shell of the lower mold according to the present invention;

[0029] Figure 8 This is a schematic diagram of the pressure forming process of the inductor core at the top of the turntable according to the present invention;

[0030] Figure 9 This is a schematic diagram of the motion structure in different regions of the inner shaft and outer sleeve of the present invention.

[0031] In the diagram: 1. Forming table; 2. Pressing assembly; 3. Upper mold; 4. Multi-station deformation mechanism; 401. Turntable; 402. Rotating shaft; 403. Storage cylinder; 404. Lower mold; 405. Material shell; 5. Fixing sleeve; 6. Toothed sleeve; 7. Temporary storage box; 8. Connecting pipe; 9. Spiral feeding shaft; 10. Tooth head; 11. Weighing and discharging assembly; 12. Inner shaft; 13. Outer sleeve; 14. Support sleeve; 15. Support pipe; 16. Guide pipe; 17. Pneumatic table; 18. Baffle. Detailed Implementation

[0032] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0033] Please see Figures 1-9 The present invention provides a technical solution: the current inductor core pressing molding technology has been upgraded from the traditional single pressing to multi-step precision control and material and structure synergistic optimization. The core technology lies in solving the problems of density uniformity, interface stress and production efficiency of complex shaped cores.

[0034] For irregularly shaped magnetic cores, uneven radial stress during a single pressing process can easily lead to surface wrinkling. For simple toroidal magnetic cores, as shown in this invention, the key issue is that uneven magnetic powder filling causes differences in internal porosity after pressing, resulting in increased DC resistance and reduced saturation current capability in subsequent use.

[0035] like Figure 1 As shown, a multi-station automatic filling and pressing machine is used. The pressing component 2 is installed on the top crossbeam of the main pressing table 1. The upper mold 3 is fixed on the output shaft of the hydraulic cylinder. The multi-station deformation mechanism 4 is located on the top of the pressing table 1 and rotates. It uses eight stations to work in a cycle. At the same time, a storage cylinder 403 is installed on the top of the turntable 401 to uniformly fill the magnetic core powder. Unlike the separate magnetic core powder feeding area, this application automatically completes the quantitative filling of magnetic core powder by rotating the turntable 401, which is convenient for feeding and also keeps the top of the turntable 401 clean.

[0036] like Figure 3and Figure 4 As shown, a corresponding lower mold 404 is set on the top of the turntable 401. The lower mold 404 is located at the bottom of the turntable 401 and connected to the upper shell 405. At the same time, an outer sleeve 13 and an inner shaft 12 are slidably connected between the two. The outer sleeve 13, the inner shaft 12 and the lower mold 404 form an annular magnetic core forming chamber. With the extrusion of the upper mold 3, it is automatically formed. At the same time, by using the movement of the inner shaft 12 and the outer sleeve 13, the formed magnetic core can be automatically pushed out, which facilitates the subsequent automatic unloading work.

[0037] For adjusting the position of the inner shaft 12 and outer sleeve 13 during rotation, a support sleeve 14 and a support tube 15 are correspondingly set inside the forming table 1 and at the bottom of the turntable 401. The support tube 15 is located inside the support sleeve 14 and is arranged in a ring shape. The outer sleeve 13 abuts against the top of the support sleeve 14, and the inner shaft 12 abuts against the support tube 15. By changing the structure of the support tube 15 and the support sleeve 14 in a specific area, the storage height of the inner shaft 12 and outer sleeve 13 can be adjusted to create different placement patterns to adapt to different areas.

[0038] like Figure 8 As shown, the top of the entire turntable 401 is divided into five functional areas, which, when rotated clockwise, are the pressing area, discharging area, replenishing area, calibration area, and mixing area. The pressing area corresponds to... Figure 2 In the uppermost area shown, when the turntable 401 drives the lower mold 404 into this area, it begins to prepare to be pressed by the upper mold 3 pushed by the pressure component 2 to complete the magnetic core forming. After forming, to avoid continuously occupying the inner cavity of the lower mold 404, the magnetic core needs to be pushed out for unloading.

[0039] like Figure 1 As shown, a slidable pneumatic table 17 is provided on the side wall of the top beam of the forming table 1. The bottom of the pneumatic table 17 is fixed with an upper baffle 18. At the same time, a guide table is also provided on the side of the lower mold 404 of the forming table 1. As the turntable 401 rotates, the height of the outer sleeve 13 in the cavity of the lower mold 404 is changed, and the formed magnetic core is pushed out. During the rotation, it comes into contact with the baffle 18 at a special position. This position is controlled by the extension and retraction of the pneumatic table 17, so that the baffle 18 completes the contact of the top of the pushed-out magnetic core without contacting the surface of the lower mold 404. The magnetic core is guided by its own inclined surface and finally the magnetic core is blocked into the guide table, realizing the automatic feeding of the magnetic core.

[0040] like Figure 9As shown, the above-mentioned molding magnetic core push requires the outer sleeve 13 to move. For this reason, a protrusion is set on the support sleeve 14 at the corresponding position of the discharge area. When the turntable 401 rotates normally, the outer sleeve 13 contacts the protrusion, causing the magnetic core to move upward. This contact is actually quite precise. When the magnetic core is pushed to the highest point, the baffle 18 just contacts the magnetic core. Otherwise, when the magnetic core descends and then contacts the baffle 18, it is easy to cause jamming. In severe cases, it can cause mold deformation and magnetic core breakage. The position of the protrusion on the top of the support sleeve 14 can be adjusted to increase the time that the outer sleeve 13 stays at its highest point.

[0041] After the material discharge is completed, the 404 cavity of the lower mold needs to be replenished with material before a new round of magnetic core forming work can begin. The replenishment area is where the magnetic core powder is pre-entered. Figure 7 As shown, a temporary storage box 7 is installed on the side of the material shell 405, such as Figure 5 As shown, a connecting pipe 8 is also installed between the temporary storage box 7 and the turntable 401, and a spiral feeding shaft 9 is movably installed inside the connecting pipe 8.

[0042] The end of the spiral feeding shaft 9 is fixed with a tooth 10. Similarly, a fixed sleeve 5 is installed on the rotating shaft 402 at the bottom of the turntable 401. The fixed sleeve 5 is fixed in the forming table 1 by a bracket. A toothed sleeve 6 is fitted on the outer wall of the fixed sleeve 5. The toothed sleeve 6 is a toothed area with teeth. The specific area refers to the material feeding area. When the turntable 401 rotates to the material feeding area, the tooth 10 at the end of the connecting pipe 8 begins to contact the teeth on the toothed sleeve 6, causing it to rotate and drive the spiral feeding shaft 9 to rotate, thus pushing the magnetic core stored in the connecting pipe 8 into the temporary storage box 7.

[0043] like Figure 1 The top of the turntable 401 shown is provided with a storage cylinder 403. The storage cylinder 403 is connected to the connecting pipe 8 through multiple guide pipes 16. In other words, magnetic core powder continuously enters one side of the spiral feeding shaft 9 along the guide pipes 16. As the spiral feeding shaft 9 rotates, the magnetic core powder in the temporary storage box 7 is automatically replenished.

[0044] Since the magnetic core requires extrusion molding of equal mass of magnetic core powder, a calibration area is set up so that when the turntable 401 rotates in this area, the excess magnetic core powder in the temporary storage box 7 is discharged. The temporary storage box 7 is equipped with a weighing and discharging assembly 11. Figure 7 As shown, the front-end weight sensor obtains the total mass of the magnetic core powder discharged. The controller opens the valve on the bottom pipe of the temporary storage box 7 to discharge the magnetic core powder in equal amounts, while retaining a fixed mass of magnetic core powder in the temporary storage box 7 for subsequent magnetic core extrusion molding.

[0045] Since there is no need for the temporary storage box 7 to be connected to the material shell 405 when moving from the feeding area to the calibration area, the outer sleeve 13 and the inner shaft 12 keep the gap closed at this time to prevent some magnetic core powder from being discharged through the gap at the connection position during replenishment and calibration. After the magnetic core powder calibration is completed, the turntable 401 enters the material mixing area and needs to push the weighed magnetic core powder into the material shell 405. It is necessary to control the outer sleeve 13 and the inner shaft 12 to descend in the material shell 405 and open the gap between the temporary storage box 7 and the material shell 405.

[0046] like Figure 9 As shown, slots are provided at the support sleeve 14 and support tube 15 corresponding to the material mixing area, causing the outer sleeve 13 and inner shaft 12 to automatically descend when entering the slots. At the same time, the entire inner shaft 12 descends to a greater height than the outer sleeve 13, so that the two form a concave structure in the material shell 405. This, together with the magnetic core powder flowing out through the gap, completes the filling work of the lower mold 404 cavity.

[0047] Since the core powder entering the concave structure formed by the outer jacket 13 and the inner shaft 12 is relatively loose, a protrusion is provided at the top of the support tube 15 to compact the core powder. As the turntable 401 rotates, the inner shaft 12 continuously contacts the protrusion to generate vibration, thereby compacting the core powder, improving the uniformity of core powder filling, and providing a stable foundation for subsequent core molding. At the same time, the concave structure prevents the core powder from flowing back to the temporary storage box 7 during subsequent upward movement.

[0048] While the material is being assembled, the turntable 401 enters the pressing area, the outer sleeve 13 and the inner shaft 12 move upward, and finally complete the specific structural composition in the inner cavity of the lower mold 404. With the extrusion of the upper mold 3, the magnetic core is quickly formed, and the magnetic core processing is continuous and efficient, improving the overall production efficiency of the magnetic core.

[0049] Subsequently, the magnetic core powder discharged from the temporary storage box 7 falls into the concentrated area inside the molding table 1. Later, one side of the molding table 1 can be opened to collect the magnetic core powder and replenish it into the storage cylinder 403.

[0050] The above description is merely an example and illustration of the structure of the present invention. Those skilled in the art can make various modifications or additions to the specific embodiments described, or use similar methods to replace them, as long as they do not deviate from the structure of the invention or exceed the scope defined in the claims, all of which should fall within the protection scope of the present invention.

Claims

1. A pressure forming device based on inductor core processing, comprising a forming table (1) and a pressure assembly (2), characterized in that, A pressure assembly (2) is installed on the top crossbeam of the forming table (1), and a multi-station deformation mechanism (4) is movably connected to the top of the forming table (1). The multi-station deformation mechanism (4) includes a turntable (401) movably connected to the top of the forming table (1). A storage cylinder (403) is provided on the top of the turntable (401). A rotating shaft (402) is provided at the bottom of the turntable (401). The bottom of the rotating shaft (402) is movably connected to the inner wall of the forming table (1) through a bearing. A lower mold (404) is evenly fixed on the top of the turntable (401) by bolts. A material shell (405) is fixedly connected to the bottom of the lower mold (404) and on the turntable (401). A temporary storage box (7) is welded and fixed to the side of the shell (405). A connecting pipe (8) is fixed to the side of the temporary storage box (7). One side of the connecting pipe (8) is fixed to the inner wall of the turntable (401). An outer sleeve (13) is slidably connected to the lower mold (404). An inner shaft (12) is slidably connected inside the outer sleeve (13). A support sleeve (14) and a support pipe (15) are provided inside the forming table (1) and at the bottom of the outer sleeve (13) and the inner shaft (12). The support sleeve (14) is fixedly connected to the support pipe (15) with a gap. The bottom of the outer sleeve (13) abuts against the top of the support sleeve (14). The bottom of the inner shaft (12) abuts against the top of the support pipe (15).

2. The pressure forming equipment based on inductor core processing according to claim 1, characterized in that, A fixing sleeve (5) is fitted inside the forming table (1) and on the outer wall of the rotating shaft (402), and a toothed sleeve (6) is fitted on the outer wall of the fixing sleeve (5).

3. The pressure forming equipment based on inductor core processing according to claim 2, characterized in that, A spiral feeding shaft (9) is movably connected inside the side connecting pipe (8) of the turntable (401). The spiral feeding shaft (9) is located inside the turntable (401) and is fitted with a toothed head (10). The toothed head (10) is meshed with the toothed sleeve (6). The other side of the spiral feeding shaft (9) extends into the temporary storage box (7).

4. The pressure forming equipment based on inductor core processing according to claim 3, characterized in that, The inner wall of the storage cylinder (403) at the top of the turntable (401) is provided with multiple sets of guide pipes (16), and the end of the guide pipe (16) is connected to the storage cylinder (403), and the other end of the guide pipe (16) is connected to the connecting pipe (8).

5. The pressure forming equipment based on inductor core processing according to claim 4, characterized in that, The temporary storage box (7) at the bottom of the turntable (401) is connected to the material shell (405). The temporary storage box (7) is equipped with a weighing and discharging assembly (11). The weighing and discharging assembly (11) consists of a front-end weight sensor, a controller and an electric control valve. The electric control valve is installed on the bottom pipe of the temporary storage box (7).

6. The pressure forming equipment based on inductor core processing according to claim 5, characterized in that, A pneumatic platform (17) is slidably connected to the side wall of the crossbeam at the top of the forming table (1), and a baffle (18) is fixed to the bottom of the pneumatic platform (17) by bolts.

7. The pressure forming equipment based on inductor core processing according to claim 6, characterized in that, The pressure forming method for machining the inductor core is as follows: Rotary weighing and feeding, accompanied by the rotation of the rotating shaft (402) driven by the motor at the bottom of the forming table (1), the spiral feeding shaft (9) located on the connecting pipe (8) at the bottom of the turntable (401) rotates, so that the end tooth (10) contacts the toothed side of the toothed sleeve (6), and the spiral feeding shaft (9) rotates along with the rotation of the turntable (401), driving the magnetic core powder stored in the storage cylinder (403) to enter the temporary storage box (7) along the connecting pipe (8); Then the turntable (401) continues to rotate, causing the tooth (10) to disengage from the toothed side of the missing tooth sleeve (6). At the same time as the feeding stops, the weighing and discharging assembly (11) on the temporary storage box (7) starts to work. According to the weight of the magnetic core powder discharged into the temporary storage box (7), the bottom port valve is opened to discharge the excess magnetic core powder. The turntable (401) rotates again to the gap between the support sleeve (14) and the support tube (15). The inner shaft (12) and outer sleeve (13) in the shell (405) slide downwards, and the gap between the temporary storage box (7) and the shell (405) opens. After weighing, the magnetic core powder automatically slides into the slot constructed by the inner shaft (12) and outer sleeve (13) for storage. At the same time, when the inner shaft (12) moves on the support tube (15), it contacts the protrusions on its surface and generates vibration, thus completing the compaction of the magnetic core powder. Finally, as the inner shaft (12) and outer sleeve (13) are reset on the support sleeve (14) and support tube (15), the overall turntable (401) moves to the stamping station. The pressurizing component (2) drives the upper mold (3) to contact the cavity formed in the lower mold (404) to complete the extrusion molding of the magnetic core powder. As the turntable (401) rotates in the future, the outer sleeve (13) contacts the protrusion on the surface of the support sleeve (14) and pushes the formed magnetic core out of the lower mold (404). It is then automatically discharged under the interception of the set baffle (18).

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