A soft magnetic ferrite core grinding device

Abstract

The application discloses a soft magnetic ferrite core grinding device and relates to the technical field of core grinding devices.The device comprises a rack, the inner side of the rack is provided with a soft magnetic ferrite core, the top of the rack is fixedly connected with a connecting frame, the inner side of the connecting frame is slidably connected with a first sliding seat, the bottom of the first sliding seat is fixedly connected with two fixing frames, and one end of the connecting frame is provided with a first driving motor.The device is provided with a staggered grinding mechanism, so that when grinding, three annular staggered grinding heads cooperate with the uniformly rotating magnetic core to sequentially complete the rough grinding, semi-fine grinding and fine grinding of the device, the size modification and surface finishing are realized, the surface residual stress of the workpiece is homogenized, the surface layer micro-crack risk is reduced, and the uniformity of the surface roughness and the magnetic performance of the finished product is ensured.

Description

Technical Field

[0001] This invention relates to the field of magnetic core grinding equipment technology, specifically a soft magnetic ferrite core grinding equipment. Background Technology

[0002] Soft ferrite cores are non-metallic soft magnetic components made primarily of iron oxide, combined with metal oxides such as manganese, zinc, and nickel, and sintered at high temperatures using powder metallurgy. Their resistivity is significantly higher than that of metallic soft magnetic materials such as silicon steel and permalloy. They exhibit extremely low eddy current losses in mid-to-high frequency operating scenarios and possess characteristics such as low coercivity, easy magnetization and demagnetization, and good chemical stability. The mainstream types are manganese-zinc ferrite cores, suitable for low-to-medium frequency power conversion scenarios (1kHz~2MHz), and nickel-zinc ferrite cores, suitable for high-frequency filtering and radio frequency scenarios (several MHz to hundreds of MHz). They can be processed into various structural forms such as toroidal, EE-type, and can-type cores. They are core magnetic circuit components for electronic devices such as switching power supply transformers, common-mode inductors, EMI filters, and RF antennas, and are widely used in consumer electronics, new energy, communications, industrial control, automotive electronics, and many other fields. The existing cylindrical grinding process for soft magnetic ferrite cores typically involves first clamping and fixing the sintered blank core in the rotary clamping mechanism of a cylindrical grinding machine. After aligning the workpiece axis with the grinding rotation reference, the drive is activated, causing the core to rotate uniformly around its own axis. Simultaneously, the grinding wheel is started to reach its operating speed. Then, the radial feed of the grinding wheel is controlled to contact the outer diameter of the workpiece. A rough grinding process is first completed with a large depth of cut to quickly remove most of the machining allowance of the blank and correct the initial outer diameter deviation and roundness error. The depth of cut is then adjusted to complete the semi-finish grinding and finish grinding processes in sequence, gradually smoothing out the tool marks from the previous feed and reducing the surface grinding stress. Finally, the outer diameter of the core meets the target dimensional tolerance and surface roughness requirements. In this method, the workpiece is subjected to a unidirectional radial force during grinding. The slender cylindrical core is prone to grinding chatter and radial deformation, resulting in poor dimensional consistency along the entire length of the workpiece and surface chatter marks. At the same time, the grinding heat source is concentrated in a single contact area, and heat continues to accumulate during continuous processing, which can easily lead to thermal degradation of the magnetic properties of manganese-zinc ferrite and thermal cracking defects. Summary of the Invention

[0003] The purpose of this invention is to provide a grinding device for soft magnetic ferrite cores, in order to solve the problem that when a workpiece is subjected to unidirectional radial force, a slender magnetic core is prone to grinding chatter and radial deformation, resulting in poor dimensional consistency of the workpiece and surface chatter marks. At the same time, the grinding heat source is concentrated in a single contact area, and the heat accumulates continuously, which can easily cause thermal degradation of the magnetic properties of manganese zinc ferrite and thermal cracking defects.

[0004] To achieve the above objectives, the present invention provides the following technical solution: a soft magnetic ferrite core grinding device, comprising: a frame, a soft magnetic ferrite core disposed on the inner side of the frame, a connecting frame fixedly connected to the top of the frame, a first sliding seat slidably connected to the inner side of the connecting frame, two fixed frames fixedly connected to the bottom of the first sliding seat, a first drive motor mounted on one end of the connecting frame, and a one-way lead screw fixedly connected to the inner side of the connecting frame through the output end of the first drive motor, the first sliding seat being threadedly connected to the outer wall of the one-way lead screw; a staggered grinding mechanism disposed on the inner side of the connecting frame for graded grinding of the soft magnetic ferrite core, the staggered grinding mechanism including three grinding heads disposed at the bottom of the first sliding seat, the three grinding heads being arranged in a ring-shaped staggered arrangement on the outer side of the soft magnetic ferrite core, a vertical moving component disposed at the top, and an angle changing mechanism disposed at the bottom of the first sliding seat for changing the angle of the grinding heads.

[0005] As a further embodiment of the present invention: the vertical moving component includes three fixed supports fixedly connected to the inner sides of the two fixed frames, wherein each of the three fixed supports is provided with a second sliding seat on its inner side, wherein two of the second sliding seats are slidably connected to the inner sides of the corresponding two fixed supports, and the other second sliding seat is fixedly connected to the corresponding other fixed support.

[0006] As a further embodiment of the present invention: the vertical moving component further includes a first connecting cylinder fixedly connected to the bottom of the second sliding seat, a first piston rod slidably connected to the inner side of the first connecting cylinder, a rectangular block fixedly connected to the bottom of the first piston rod, a first compression spring installed between the first piston rod and the inner side of the first connecting cylinder, and a power unit provided on one side of the second sliding seat.

[0007] As a further embodiment of the present invention: the power unit includes a liquid storage tank fixedly connected to the top of one of the fixed frames. A suction pump is installed at the outlet of the liquid storage tank, and the output end of the suction pump extends through to the inside of the fixed frame and is fixedly connected to a second connecting pipe. Two first connecting seats are fixedly connected to the inside of the fixed frame, and first connecting pipes are fixedly connected to the inside of the two first connecting seats. The inlet of the first connecting pipe is fixedly connected to the other end of the second connecting pipe. Three third connecting pipes are installed at the outlet of the first connecting pipe, and the other ends of the three third connecting pipes are respectively fixedly connected to the inlet of a first connecting cylinder. A lateral mover is provided on one side of the first connecting cylinder.

[0008] As a further embodiment of the present invention: the lateral mover includes two connecting blocks fixedly connected to the top of two of the second sliding seats, wherein a second connecting cylinder is fixedly connected to the top of each of the two fixed supports, a second piston rod is slidably connected to the inner side of the second connecting cylinder, and a second compression spring is installed between the second piston rod and the inner side of the second connecting cylinder.

[0009] As a further embodiment of the present invention: the lateral mover further includes a first solenoid valve installed at the liquid inlet of the second connecting cylinder, wherein a fourth connecting pipe is fixedly connected to the liquid outlet of the two first connecting cylinders, and the other end of the fourth connecting pipe is fixedly connected to the first solenoid valve.

[0010] As a further embodiment of the present invention: the angle changing mechanism includes two second connecting seats fixedly connected to the bottom of the rectangular block, each of the two second connecting seats having a rotating shaft rotatably connected to its inner side, and a drive seat fixedly connected between the two rotating shafts, with the output end of the drive seat fixedly connected to the grinding head, a second drive motor mounted on one side of one of the second connecting seats, and the output end of the second drive motor extending through to the inner side of the second connecting seat and fixedly connected to one of the rotating shafts, and an outlet adjustment assembly provided on the inner side of the grinding head.

[0011] As a further embodiment of the present invention: the outlet adjustment assembly includes a first cooling chamber, a second cooling chamber and a third cooling chamber opened inside the grinding head, and two second solenoid valves are installed inside the first cooling chamber, and the other ends of the two second solenoid valves are connected to the second cooling chamber and the third cooling chamber. Inside the first cooling chamber, a fifth connecting pipe is installed at the liquid inlet of the first cooling chamber.

[0012] As a further embodiment of the present invention: the outlet adjustment assembly further includes a plurality of small holes and a plurality of large holes formed inside the grinding head, wherein the plurality of small holes communicate with the inner side of the third cooling chamber, and a connecting pipe is fixedly connected to the top of each of the plurality of large holes, and the top of the connecting pipe is fixedly connected to the liquid outlet of the second cooling chamber.

[0013] Compared with the prior art, the beneficial effects of the present invention are: 1. By setting up a staggered grinding mechanism, during grinding, three ring-shaped staggered grinding heads work in conjunction with a uniformly rotating magnetic core to complete the graded progressive processing of rough grinding, semi-fine grinding, and fine grinding in sequence. This achieves dimensional shaping and surface finishing, homogenizes residual stress on the workpiece surface, reduces the risk of surface micro-cracks, and ensures the surface roughness and magnetic property uniformity of the finished product. At the same time, the radial grinding force of the three sets of grinding heads is balanced circumferentially to form a self-balance, which can reduce grinding vibration and clamping deformation of slender magnetic cores. Furthermore, the dispersed grinding can avoid continuous heat accumulation and further suppress thermal permeability decay and thermal cracking defects in soft magnetic ferrites. 2. By setting a transverse mover, the grinding head is driven to complete the radial dimension adaptation and transverse spacing adjustment, and the grinding head spacing is adaptively adjusted according to the workpiece diameter through step-by-step locking logic; thus, sufficient heat dissipation and chip removal intervals are reserved for small diameters, and the grinding heat source is dispersed for large diameters, thereby suppressing the thermally induced magnetic permeability decay and thermal cracking defects of manganese zinc ferrite, and stably ensuring the consistency of grinding accuracy and finished product performance. 3. By setting an angle change mechanism, when grinding large-diameter magnetic cores, the drive seat is deflected circumferentially, increasing the tilt angle of the liquid outlet micro-hole of the grinding head, so that the liquid outlet direction is close to the tangent direction of the workpiece circumference. This extends the arc length of the coolant coverage, enhances the forward chip flushing effect, matches the heat dissipation and chip removal requirements of large grinding volume, and effectively reduces the peak temperature of the grinding zone. 4. By setting up an outlet adjustment component, when machining small-diameter magnetic cores, the upper valve is opened, and the coolant precisely covers the grinding area with a small flow rate through the small orifice; when machining medium-diameter magnetic cores, the lower valve is opened, and the coolant matches the heat dissipation and chip removal requirements of medium grinding load with a moderate flow rate through the large orifice; when machining large-diameter magnetic cores, both valves are opened simultaneously, and the two coolant streams are sprayed out in a combined manner, expanding the coverage area and increasing the total flow rate and chip removal force. This allows the size of the discharge hole to be adjusted according to the size of different workpieces, further enhancing the ability to prevent thermal damage and magnetic chip defects, and ensuring the consistency of magnetic properties and surface finish of finished magnetic cores of different specifications. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the structure of the present invention; Figure 2 This is a schematic diagram of the misaligned grinding mechanism of the present invention; Figure 3 This is a cross-sectional view of the misaligned grinding mechanism of the present invention; Figure 4 This is a schematic diagram of the vertical moving component structure of the present invention; Figure 5 This is a cross-sectional view of the vertical moving component of the present invention; Figure 6 This is a schematic diagram of the lateral movement structure of the present invention; Figure 7 This is a partial structural diagram of the lateral mover of the present invention; Figure 8 This is a schematic diagram of the angle changing mechanism of the present invention; Figure 9 This is an exploded view of the grinding head and grinding head components of the present invention.

[0015] In the diagram: 1. Frame; 2. Connecting frame; 3. First drive motor; 4. One-way lead screw; 5. First sliding seat; 6. Fixed frame; 7. Soft magnetic ferrite core; 8. Liquid storage tank; 9. Suction pump; 10. First connecting pipe; 11. First connecting seat; 12. Second connecting pipe; 13. Third connecting pipe; 14. Second sliding seat; 15. First connecting cylinder; 16. Fixed support; 17. First piston rod; 18. First compression spring; 19. Grinding head; 2 0. Rectangular block; 21. Connecting block; 22. Second connecting cylinder; 23. Second piston rod; 24. Second compression spring; 25. First solenoid valve; 26. Fourth connecting pipe; 27. Second drive motor; 28. Second connecting seat; 29. ​​Rotating shaft; 30. Drive seat; 31. Fifth connecting pipe; 32. First cooling chamber; 33. Second cooling chamber; 34. Third cooling chamber; 35. Second solenoid valve; 36. Small hole; 37. Connecting pipe; 38. Large hole. Detailed Implementation

[0016] 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.

[0017] In the description of this invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating orientation or positional relationships, are based on the orientation or positional relationships shown in the accompanying drawings and 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, and therefore should not be construed as a limitation of this invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance. In the description of this invention, it should be noted that unless otherwise explicitly specified and limited, the terms "installed," "connected," "linked," and "set up" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal communication of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances. The following describes embodiments of the invention based on its overall structure.

[0018] Please see Figures 1-9This embodiment provides a soft magnetic ferrite core grinding device; including: a frame 1, a soft magnetic ferrite core 7 disposed on the inner side of the frame 1, a connecting frame 2 fixedly connected to the top of the frame 1, a first sliding seat 5 slidably connected to the inner side of the connecting frame 2, two fixed frames 6 fixedly connected to the bottom of the first sliding seat 5, a first drive motor 3 installed at one end of the connecting frame 2, and a one-way lead screw 4 fixedly connected to the inner side of the connecting frame 2 through the output end of the first drive motor 3, and the first sliding seat 5 threadedly connected to the outer wall of the one-way lead screw 4; a staggered grinding mechanism, disposed on the inner side of the connecting frame 2, used for graded grinding of the soft magnetic ferrite core 7, the staggered grinding mechanism including three grinding heads 19 disposed at the bottom of the first sliding seat 5, and the three grinding heads 19 being arranged in a ring staggered arrangement on the outer side of the soft magnetic ferrite core 7, 1 A vertical moving assembly is provided at the top of component 9. The vertical moving assembly includes three fixed supports 16 fixedly connected to the inner sides of two fixed frames 6. Each of the three fixed supports 16 has a second sliding seat 14 on its inner side. Two second sliding seats 14 are slidably connected to the inner sides of their respective two fixed supports 16, and the third second sliding seat 14 is fixedly connected to its corresponding other fixed support 16. The vertical moving assembly also includes a first connecting cylinder 15 fixedly connected to the bottom of the second sliding seat 14. A first piston rod 17 is slidably connected to the inner side of the first connecting cylinder 15. A rectangular block 20 is fixedly connected to the bottom of the first piston rod 17. A first compression spring 18 is installed between the first piston rod 17 and the inner side of the first connecting cylinder 15. The second sliding... A power unit is provided on one side of the base 14; the power unit includes a liquid storage tank 8 fixedly connected to the top of one of the fixed frames 6, a suction pump 9 is installed at the outlet of the liquid storage tank 8, and the output end of the suction pump 9 passes through to the inside of the fixed frame 6 and is fixedly connected to a second connecting pipe 12. Two first connecting seats 11 are fixedly connected to the inside of the fixed frame 6, and a first connecting pipe 10 is fixedly connected to the inside of the two first connecting seats 11. The inlet of the first connecting pipe 10 is fixedly connected to the other end of the second connecting pipe 12. Three third connecting pipes 13 are installed at the outlet of the first connecting pipe 10, and the other ends of the three third connecting pipes 13 are respectively fixedly connected to the inlet of a first connecting cylinder 15. A lateral mover is provided on one side of the first connecting cylinder 15. When the operator needs to grind the soft magnetic ferrite core 7, two three-jaw chucks are provided on the inner side of the frame 1. One of the three-jaw chucks has a seat that is slidably connected to the frame 1, and the other three-jaw chuck is fixedly connected to the frame 1. The other end of the three-jaw chuck slidably connected to the frame 1 is connected to a drive mechanism, which can drive the three-jaw chuck to move laterally. When the operator places the soft magnetic ferrite core 7 in the grinding position, the operator can start the drive mechanism to move laterally, thereby clamping the soft magnetic ferrite core 7 and limiting and fixing it. At the same time, both ends of the two three-jaw chucks are provided with a rotary drive mechanism, which can drive the soft magnetic ferrite core 7 to rotate uniformly around its own axis (since this technology is existing technology, it is not described in detail in this solution). A PLC controller is installed on the top of the frame 1. The PLC controller can control the intermittent start of the rotary mechanism. After the soft magnetic ferrite core 7 is clamped and fixed, the PLC controller outputs a control signal to start the workpiece rotary mechanism, which drives the soft magnetic ferrite core 7 to rotate around its own axis. At the same time, a grinding drive unit is built into the inner side of the drive base 30, which can independently drive the corresponding grinding head 19 to rotate at high speed to perform grinding operations. Since this technology is existing technology, it is not described in detail in this solution. Both the suction pump 9 and the drive base 30 are controlled by a PLC controller, which can control the intermittent start of the suction pump 9 and the drive base 30. After the soft magnetic ferrite core 7 is clamped and enters a stable rotation state, the PLC controller first starts the drive base 30, which drives the grinding head 19 to reach the set working speed. Then, the suction pump 9 is started to transport the liquid in the storage tank 8 to the cavity of the three first connecting cylinders 15, which pushes the three grinding heads 19 to feed smoothly along the axial direction of the soft magnetic ferrite core 7. When the grinding head 19 feeds to contact the outside of the soft magnetic ferrite core 7 and reaches the preset cutting depth, the suction pump 9 is turned off, thereby grinding the soft magnetic ferrite core 7. When the three grinding heads 19 are radially fed to contact the outer side of the soft magnetic ferrite core 7 and reach the preset graded cutting depth, the PLC controller controls the first drive motor 3 to start, driving the first sliding seat 5 to move smoothly to the other end of the fixed frame 6, thereby driving the three sets of grinding heads 19 arranged in a ring staggered manner to move synchronously along the axial direction of the soft magnetic ferrite core 7, and performing continuous grinding of the soft magnetic ferrite core 7 along its full length. When the soft magnetic ferrite core 7 moves to the other end of the core and completes the full length processing, the axial feed first drive motor 3 stops running, and the grinding heads radially return to their original positions, waiting for the next workpiece to be loaded. When grinding the soft ferrite core 7, the three grinding heads 19 are arranged in a staggered ring around the circumference. Driven by the rotary drive mechanism, the soft ferrite core 7 rotates at a constant speed around its own axis. The three grinding heads sequentially perform graded progressive grinding on the outer circle of the core. First, the first grinding head 19 completes the rough grinding to remove excess material from the outer circle of the blank. Then, the second grinding head 19 completes the semi-finish grinding process to further smooth out the feed marks left by the rough grinding. Finally, the third grinding head 19 completes the finish grinding process to give the outer side of the soft ferrite core 7 a final finishing touch. Shaping and finishing processes ensure that the outer diameter of the magnetic core reaches the target dimensional tolerance, thereby homogenizing the residual stress on the surface of the soft magnetic ferrite core 7, reducing the risk of surface micro-cracks, and ensuring the surface roughness and magnetic property uniformity of the finished product. Throughout the grinding process, the radial grinding forces of the three grinding heads counterbalance each other in the circumferential direction, forming a self-balancing force, which can significantly reduce grinding chatter and clamping deformation of slender magnetic cores. At the same time, the grinding heat source is distributed in different circumferential positions and acts intermittently with the rotation of the workpiece, avoiding the continuous accumulation of local heat, thereby suppressing the thermal permeability decay and thermal cracking defects of the soft magnetic ferrite.

[0019] Please see Figures 2-6 The lateral mover includes two connecting blocks 21 fixedly connected to the top of two second sliding seats 14, and a second connecting cylinder 22 fixedly connected to the top of each of the two fixed supports 16. A second piston rod 23 is slidably connected to the inner side of the second connecting cylinder 22. A second compression spring 24 is installed between the second piston rod 23 and the inner side of the second connecting cylinder 22. The lateral mover also includes a first solenoid valve 25 installed at the liquid inlet of the second connecting cylinder 22. A fourth connecting pipe 26 is fixedly connected to the liquid outlet of the two first connecting cylinders 15, and the other end of the fourth connecting pipe 26 is fixedly connected to the first solenoid valve 25. The first solenoid valve 25 is controlled by a PLC controller to open and close precisely according to processing requirements. When grinding soft magnetic ferrite cores 7 of different sizes, if a smaller diameter core 7 is to be fitted, the PLC controller starts the suction pump 9 to draw hydraulic oil from the reservoir 8 into the first connecting cylinder 15, pushing the three grinding heads 19 to move synchronously towards the axis center of the soft magnetic ferrite core 7, thus adapting the radial grinding dimension of the workpiece. Simultaneously with the hydraulic oil delivery, the PLC controller opens the first solenoid valve 25, and under the power of the suction pump 9, guides the hydraulic oil into the second connecting cylinder 22, driving the second piston rod 23 to move along the end of the fixed frame 6, thereby driving the corresponding grinding head 19 to complete the lateral position adjustment, so that when the middle grinding head 19 moves to the pre-set position... After the adaptation position is set, the PLC controller closes the corresponding first solenoid valve 25 to lock the position of the middle grinding head; after the right grinding head 19 is adjusted to the position, the corresponding first solenoid valve 25 is closed to complete the locking. Finally, the lateral spacing of the three grinding heads 19 is adaptively adjusted according to the diameter of the soft magnetic ferrite core 7. This allows for sufficient grinding interval time when grinding small-diameter workpieces, due to the small grinding allowance and low heat load, ensuring heat dissipation and chip removal, and avoiding continuous accumulation of grinding heat. For large-diameter workpieces with large grinding allowance and high heat load, the grinding head spacing can be automatically increased to effectively disperse the grinding heat source, further suppressing defects such as thermal permeability decay and thermal cracking of manganese-zinc ferrite, and stably ensuring the consistency of workpiece grinding accuracy and finished product performance.

[0020] Please see Figures 4-9An angle-changing mechanism is located at the bottom of the first sliding seat 5 and is used to change the angle of the grinding head 19. The angle-changing mechanism includes two second connecting seats 28 fixedly connected to the bottom of the rectangular block 20. A rotating shaft 29 is rotatably connected to the inner side of each of the two second connecting seats 28, and a drive seat 30 is fixedly connected between the two rotating shafts 29. The output end of the drive seat 30 is fixedly connected to the grinding head 19. A second drive motor 27 is mounted on one side of one of the second connecting seats 28, and the output end of the second drive motor 27 extends through the inner side of the second connecting seat 28 and is fixedly connected to one of the rotating shafts 29. An outlet adjustment assembly is provided inside the grinding head 19. The outlet adjustment assembly includes... The grinding head 19 includes a first cooling chamber 32, a second cooling chamber 33, and a third cooling chamber 34 located inside the grinding head 19. Two second solenoid valves 35 are installed inside the first cooling chamber 32, and the other ends of the two second solenoid valves 35 are connected to the second cooling chamber 33 and the third cooling chamber 34. A fifth connecting pipe 31 is installed at the liquid inlet of the first cooling chamber 32. The outlet regulating assembly also includes multiple small holes 36 and multiple large holes 38 located inside the grinding head 19. The multiple small holes 36 are connected to the inside of the third cooling chamber 34, and a connecting pipe 37 is fixedly connected to the top of each of the multiple large holes 38. The top of the connecting pipe 37 is fixedly connected to the liquid outlet of the second cooling chamber 33. The second drive motor 27 is controlled by a PLC controller, which can control the second drive motor 27 to start intermittently. When it is necessary to adapt to a soft magnetic ferrite core 7 with a larger diameter, the PLC controller controls the second drive motor 27 to start, which drives the drive seat 30 to deflect circumferentially, thereby increasing the tilt angle of the grinding head 19. This makes the grinding depth greater and the tilt angle of the liquid outlet micro-hole increases simultaneously, making the liquid outlet direction closer to the circumferential tangent direction of the soft magnetic ferrite core 7. This can extend the coverage length of the coolant in the grinding contact arc, match the longer contact arc heat dissipation requirements of large-diameter workpieces, effectively control the peak temperature of the grinding zone, and at the same time enhance the forward chip removal effect, quickly carrying away the coarse magnetic chips generated by the large grinding volume away from the grinding contact area. When the tilt angle is adjusted to the preset target value, the PLC controller controls the tilt angle adjustment drive component, the second drive motor 27, to stop and lock the position. Both sets of electromagnetic control valves, specifically the second electromagnetic valve 35, are independently controlled by a PLC controller. This allows for switching the coolant outlet path based on the diameter of the soft magnetic ferrite core 7 to be processed, achieving adaptive matching between cooling flow rate and coverage area. Before grinding, the fifth connecting pipe 31 is connected to the external coolant supply line, continuously supplying pressure-stabilized coolant to the first cooling chamber 32. When processing small-diameter soft magnetic ferrite cores 7, the single-stage grinding allowance is small and the grinding contact arc is short. The PLC controller controls the second electromagnetic valve 35 located above to open, and the coolant is directionally sprayed out through the small hole 36, precisely covering the grinding contact area with a small flow rate. When processing medium-diameter soft magnetic ferrite cores 7, the grinding allowance and contact arc length increase synchronously, moderately increasing the heat generation rate and magnetic chip output. The LC controller controls the opening of the second solenoid valve 35 located below, and the coolant is sprayed out through the large hole 38. The appropriate flow rate and coverage range match the heat dissipation and chip removal requirements of medium-load grinding. When machining large-diameter soft magnetic ferrite cores 7, the single-stage grinding amount reaches its peak, the grinding contact arc is the longest, and the heat load is the highest. The PLC controller controls the two sets of solenoid control valves, the second solenoid valve 35, to open synchronously. The coolant is sprayed out from the upper and lower liquid outlet channels at the same time, forming a cooling and chip flushing flow that surrounds the upper and lower parts. This expands the coverage length of the coolant on the grinding contact arc and increases the total cooling flow rate and chip flushing force. It can quickly remove grinding heat and ferrite chips, further enhance the ability to prevent thermal damage and chip defects, and ensure the consistency of magnetic properties and surface processing quality of finished cores of different specifications.

[0021] The above description is merely a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A grinding device for soft magnetic ferrite cores, characterized in that, include: A frame is provided with a soft magnetic ferrite core on its inner side. A connecting frame is fixedly connected to the top of the frame. A first sliding seat is slidably connected to the inner side of the connecting frame. Two fixed frames are fixedly connected to the bottom of the first sliding seat. A first drive motor is installed at one end of the connecting frame. The output end of the first drive motor passes through the inner side of the connecting frame and is fixedly connected to a one-way lead screw. The first sliding seat is threadedly connected to the outer wall of the one-way lead screw. The offset grinding mechanism is disposed inside the connecting frame and is used to grind the soft magnetic ferrite core in stages. The offset grinding mechanism includes three grinding heads disposed at the bottom of the first sliding seat, and the three grinding heads are disposed in a ring-shaped offset outside the soft magnetic ferrite core. A vertical moving component is disposed at the top. An angle changing mechanism is disposed at the bottom of the first sliding seat and is used to change the angle of the grinding head.

2. The soft magnetic ferrite core grinding device according to claim 1, characterized in that, The vertical moving component includes three fixed supports fixedly connected to the inner sides of the two fixed frames. Each of the three fixed supports has a second sliding seat on its inner side. Two of the second sliding seats are slidably connected to the inner sides of the corresponding two fixed supports, and the other second sliding seat is fixedly connected to the corresponding other fixed support.

3. The soft magnetic ferrite core grinding device according to claim 2, characterized in that, The vertical moving component further includes a first connecting cylinder fixedly connected to the bottom of the second sliding seat. A first piston rod is slidably connected to the inner side of the first connecting cylinder. A rectangular block is fixedly connected to the bottom of the first piston rod. A first compression spring is installed between the first piston rod and the inner side of the first connecting cylinder. A power unit is provided on one side of the second sliding seat.

4. The soft magnetic ferrite core grinding device according to claim 3, characterized in that, The power unit includes a liquid storage tank fixedly connected to the top of one of the fixed frames. A suction pump is installed at the outlet of the liquid storage tank, and the output end of the suction pump extends through to the inside of the fixed frame and is fixedly connected to a second connecting pipe. Two first connecting seats are fixedly connected to the inside of the fixed frame, and first connecting pipes are fixedly connected to the inside of the two first connecting seats. The inlet of the first connecting pipe is fixedly connected to the other end of the second connecting pipe. Three third connecting pipes are installed at the outlet of the first connecting pipe, and the other ends of the three third connecting pipes are respectively fixedly connected to the inlet of a first connecting cylinder. A lateral mover is provided on one side of the first connecting cylinder.

5. The soft magnetic ferrite core grinding device according to claim 4, characterized in that, The lateral mover includes two connecting blocks fixedly connected to the top of two of the second sliding seats, wherein a second connecting cylinder is fixedly connected to the top of each of the two fixed supports, a second piston rod is slidably connected to the inner side of the second connecting cylinder, and a second compression spring is installed between the second piston rod and the inner side of the second connecting cylinder.

6. The soft magnetic ferrite core grinding device according to claim 5, characterized in that, The lateral mover also includes a first solenoid valve installed at the liquid inlet of the second connecting cylinder, wherein a fourth connecting pipe is fixedly connected to the liquid outlet of the two first connecting cylinders, and the other end of the fourth connecting pipe is fixedly connected to the first solenoid valve.

7. A soft magnetic ferrite core grinding device according to claim 6, characterized in that, The angle changing mechanism includes two second connecting seats fixedly connected to the bottom of the rectangular block. The inner sides of the two second connecting seats are rotatably connected to rotating shafts, and a drive seat is fixedly connected between the two rotating shafts. The output end of the drive seat is fixedly connected to the grinding head. A second drive motor is installed on one side of one of the second connecting seats, and the output end of the second drive motor passes through the inner side of the second connecting seat and is fixedly connected to one of the rotating shafts. An outlet adjustment assembly is provided on the inner side of the grinding head.

8. The soft magnetic ferrite core grinding device according to claim 7, characterized in that, The outlet adjustment assembly includes a first cooling chamber, a second cooling chamber, and a third cooling chamber located inside the grinding head. Two second solenoid valves are installed inside the first cooling chamber, and the other ends of the two second solenoid valves are connected to the second cooling chamber and the third cooling chamber. A fifth connecting pipe is installed inside the first cooling chamber at the liquid inlet.

9. A soft magnetic ferrite core grinding device according to claim 8, characterized in that, The outlet adjustment assembly also includes multiple small holes and multiple large holes formed inside the grinding head. The multiple small holes communicate with the inside of the third cooling chamber, and a connecting pipe is fixedly connected to the top of each of the multiple large holes. The top of the connecting pipe is fixedly connected to the liquid outlet of the second cooling chamber.

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