A magnetic core grinding machine and grinding process for preparing anti-cracking magnetic core

Abstract

The invention relates to the technical field of magnetic core grinding equipment, and discloses a magnetic core grinding machine for preparing anti-cracking magnetic cores. Two groups of adjustment devices are arranged on a machine cover and a grinding disc is installed. A clamping cylinder for sleeved magnetic cores is installed on a clamping device in the middle. A hydraulic adjustment cylinder inside the clamping device is used to control the hydraulic pressure to act on the inside of the clamping cylinder and push out a clamping strip to clamp the magnetic core. Then, the grinding discs at the upper and lower ends are used to synchronously grind the end faces of the magnetic core. After the end faces of the magnetic cores are ground, the grinding discs are driven by the adjustment device to clamp the magnetic cores. The clamping cylinder and the clamping strip are driven by the driving wheel to rotate to grind the outer side faces of the magnetic cores, thereby improving the grinding efficiency. At the same time, when the end faces of the magnetic cores are ground, the clamping strip drives the magnetic cores to rotate when the end faces are ground, thereby further improving the grinding efficiency. When the end faces of the magnetic cores are ground, each part is ground more fully and evenly, thereby ensuring the quality of the ground magnetic cores and improving the service life of the grinding discs.

Description

Technical Field

[0001] The invention relates to the technical field of magnetic core grinding equipment, in particular to a magnetic core grinding machine for preparing anti-cracking magnetic cores and a grinding process thereof. Background Art

[0002] The magnetic core refers to a sintered magnetic core metal oxide composed of a mixture of various iron oxides. It is widely used in coils and transformers of various electronic devices. The existing magnetic cores are mostly cylindrical magnetic cores and E-type magnetic cores. Among them, the production and processing of cylindrical magnetic cores are more convenient. Generally, after production, the two end faces and the outer ring side need to be ground. The equipment used is a magnetic core grinder. When working, the magnetic core is clamped on the fixture and the grinding disc is controlled to grind the end face of the magnetic core. However, this grinder still has certain shortcomings:

[0003] First, when using, one end of the cylindrical magnetic core is generally clamped, and then the other end is ground. In this way, only one end face can be ground at a time, and then it needs to be re-clamped, which leads to low grinding efficiency. Moreover, the same clamp can only grind the end face. For the outer side of the magnetic core, the grinding clamp and the grinding head need to be replaced, which also reduces the grinding efficiency. Although the existing grinders also have double-end face grinding, the clamping stability of the magnetic core is not high. Therefore, when grinding two end faces at the same time, it is easy to cause grinding deviation, which in turn affects the production quality of the magnetic core.

[0004] Secondly, when grinding the end face of the core, the grinding is performed by rotating the grinding disc on the end face of the core. However, this grinding method will result in insufficient grinding of the end face of the core near the center of the grinding disc, while the end face of the core near the outer ring of the grinding disc will be ground more fully, so that the end face of the core cannot be ground evenly. At the same time, this will also cause greater loss to the surface of the grinding disc, thereby affecting its service life, thereby resulting in a decline in the overall grinding quality. Summary of the invention

[0005] In view of the shortcomings of the above-mentioned background technology, the present invention provides a magnetic core grinder for preparing anti-cracking magnetic cores, which has the advantages of high grinding efficiency and good quality, and solves the problems raised by the background technology.

[0006] The present invention provides the following technical scheme: a magnetic core grinding machine for preparing anti-cracking magnetic core comprises a machine base, a machine cover is fixedly installed on the top of the machine base, a clamping device is fixedly installed in the middle of the machine cover, sliding grooves are symmetrically provided on both side walls of the machine cover, and the sliding grooves are located at the upper and lower ends of the clamping device and are movably installed with adjustment devices, a driving motor is fixedly installed in the middle of the adjusting device, and a grinding disc is fixedly connected to the output shaft of the driving motor, a collecting groove is provided in the middle of the top surface of the machine base, a ring-shaped and evenly provided sleeve holes are provided in the middle of the clamping device, a clamping cylinder is movably sleeved inside the sleeve holes, a transmission groove is provided on the middle inner wall of the sleeve holes, a gear ring is fixedly installed on the middle outer ring of the clamping cylinder, and the gear ring is rotatably sleeved in the transmission groove, a driving wheel is movably installed on the machine cover at a position in the middle of the back side of the clamping device, and the driving wheel is meshed with the gear ring for transmission, and a transmission gear for meshing transmission is movably installed between the gear rings inside the clamping device.

[0007] Preferably, a clamping hole is provided in the middle of the clamping cylinder, three sliding grooves are evenly provided on the inner wall of the clamping hole, a clamping strip is slidably sleeved inside the sliding groove, a second hydraulic ring groove is provided inside both ends of the clamping cylinder, a hydraulic port is provided between the second hydraulic ring groove and the sliding groove, and hydraulic blocks are provided at both ends of the clamping strip and movably sleeved inside the hydraulic port.

[0008] Preferably, the diameters opened at both ends of the sleeve hole are large, and the clamping device is located in the middle of the bottom wall of the sleeve hole and has a first hydraulic ring groove, the end of the first hydraulic ring groove is movably connected with a first hydraulic ring block, and the end of the second hydraulic ring groove is movably connected with a second hydraulic ring block, and a ball is slidably installed between the first hydraulic ring block and the second hydraulic ring block.

[0009] Preferably, a hydraulic cavity is provided in the middle of the clamping device, and the hydraulic cavity is connected to the first hydraulic ring grooves on all sides. A hydraulic adjustment cylinder is fixedly installed in the middle of the hydraulic cavity, and the upper and lower ends of the hydraulic cavity are at the same hydraulic size.

[0010] Preferably, a circular hole connected to the slide groove is opened inside the middle section of the clamping cylinder, a sleeve column with one end fixedly connected to the clamping strip is movably sleeved inside the circular hole, and a compression spring is fixedly connected between the sleeve column and the inner wall of the circular hole.

[0011] Preferably, the rotation direction of the clamping cylinder is opposite to that of the grinding disc. The grinding disc rotates simultaneously with the clamping cylinder when grinding the end face of the magnetic core, and the rotation speed of the clamping cylinder is lower than the rotation speed of the grinding disc. The grinding disc no longer rotates when clamping the two ends of the magnetic core, and at the same time, the adjusting device slides intermittently up and down along the sliding groove.

[0012] Preferably, it also includes an anti-cracking magnetic core grinding process, the steps are as follows:

[0013] S1. Start the device to control the adjustment device to slide up and down to the maximum position, and then insert the magnetic core into the clamping hole on the clamping device. When all the clamping tubes are sleeved with magnetic cores, control the adjustment device to move to the middle and adjust the center of the magnetic core to the same height as the center of the clamping device. Then, the hydraulic pressure is applied by the hydraulic adjustment cylinder and the clamping strip is driven to clamp the magnetic core through transmission.

[0014] S2. Ensure that there is a rotation gap between the magnetic core and the upper and lower grinding discs, and then use the grinding discs to rotate and grind the upper and lower end faces of the magnetic core. During this process, the clamping force of the clamping strip is maintained. At the same time, the driving wheel drives the clamping cylinder to rotate in the opposite direction through the transmission, driving the magnetic core to rotate while being rotated and grinded by the grinding disc. During grinding, the adjustment device can also be adjusted to slide to achieve different grinding effects on the end faces of the magnetic core;

[0015] S3. After the grinding of both end surfaces of the magnetic core is completed, the adjusting device is controlled to move toward the middle and clamp the magnetic core. At the same time, the grinding disc stops rotating and the hydraulic adjusting cylinder controls the hydraulic pressure to release, just enough to make the clamping force of the clamping strip on the outer side of the magnetic core disappear. Then, the two adjusting devices are controlled to move up and down synchronously and intermittently, so that the clamping strip can grind the outer surface of the magnetic core. During this process, the clamping cylinder is in a rotating state and the magnetic core does not rotate.

[0016] S4. After grinding, the hydraulic adjustment cylinder controls the hydraulic pressure to be released to the maximum position. At the same time, the adjustment device on the top moves upward to drive the grinding disc to rise synchronously. The ground magnetic core is removed from the clamping cylinder, and then the previous steps are repeated to grind the next batch of magnetic cores.

[0017] The present invention has the following beneficial effects:

[0018] 1. Two sets of adjusting devices are arranged on the machine cover and a grinding disc is installed. At the same time, a clamping device is arranged in the middle. A clamping cylinder for sleeved magnetic core is installed on the clamping device. Compared with the prior art, the hydraulic adjusting cylinder inside the clamping device is used to control the hydraulic transmission to drive the first hydraulic ring block and the second hydraulic ring block to move, and then act on the inside of the clamping cylinder and push out the clamping strip to clamp the magnetic core in the clamping hole. Then, the grinding discs at the upper and lower ends are used to synchronously grind the end faces of the magnetic core. After the end faces of the magnetic core are ground, the grinding discs are driven by the adjusting device to clamp the magnetic core. Then, the clamping force of the clamping strip on the magnetic core is released. The clamping cylinder and the clamping strip are driven to rotate by the active wheel. At the same time, the two adjusting devices as a whole drive the magnetic core to move up and down intermittently to complete the grinding of the outer side of the magnetic core. In this way, there is no need to stop the machine, and the grinding of the magnetic core can be automatically completed at one time, thereby improving the grinding efficiency.

[0019] 2. By arranging a driving wheel inside the machine cover and combining the transmission gear to transmit the gear ring, compared with the prior art, the driving wheel is used to drive the clamping cylinder to rotate when the end face of the magnetic core is ground. Since the clamping strip clamps the magnetic core, the magnetic core is driven to rotate during the end face grinding, and the rotation direction of the magnetic core is opposite to the rotation direction of the grinding disk, which further improves the grinding efficiency. At the same time, when the end face of the magnetic core is ground, each part is ground more fully and evenly, which ensures the quality of the ground magnetic core and also improves the service life of the grinding disk. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0021] Figure 2 This is a schematic diagram of the clamping magnetic core of the structure of the present invention;

[0022] Figure 3 It is a longitudinal half-section view of the overall structure of the present invention;

[0023] Figure 4 It is a transverse half-section view of the overall structure of the present invention;

[0024] Figure 5 It is a schematic diagram of the internal structure of the clamping device of the present invention;

[0025] Figure 6 It is a schematic diagram of the structure of the clamping tube of the present invention;

[0026] Figure 7 A half-section diagram of the clamping tube structure of the present invention;

[0027] Figure 8 for Figure 3 Enlarged view of point A in the middle.

[0028] In the figure: 1. base; 101. collecting groove; 102. sliding groove; 2. machine cover; 3. clamping device; 301. sleeve hole; 302. transmission groove; 303. hydraulic chamber; 304. first hydraulic ring groove; 4. adjusting device; 5. driving motor; 6. grinding disc; 7. clamping cylinder; 701. clamping hole; 702. slide groove; 703. second hydraulic ring groove; 704. hydraulic port; 705. round hole; 8. gear ring; 9. driving wheel; 10. transmission gear; 11. clamping strip; 1101. hydraulic block; 12. first hydraulic ring block; 13. second hydraulic ring block; 14. ball; 15. sleeve column; 16. compression spring; 17. hydraulic adjustment cylinder. DETAILED DESCRIPTION

[0029] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0030] Embodiment 1

[0031] See also Figure 1-Figure 8A magnetic core grinding machine for preparing anti-cracking magnetic cores comprises a machine base 1, a hood 2 is fixedly installed on the top of the machine base 1, a clamping device 3 is fixedly installed in the middle of the hood 2, sliding grooves 102 are symmetrically opened on the two side walls of the hood 2, and the sliding grooves 102 are located at the upper and lower ends of the clamping device 3 and are movably installed with adjustment devices 4, a driving motor 5 is fixedly installed in the middle of the adjustment device 4, and a grinding disc 6 is fixedly connected to the output shaft of the driving motor 5, a collecting groove 101 is opened in the middle of the top surface of the machine base 1, and the collecting groove 101 can collect debris particles and coolant generated during grinding, so as to filter and recycle the coolant, and the middle of the clamping device 3 is evenly opened with sleeve holes 301 in an annular shape, and the inner sleeve holes 301 are movably connected to the inner sleeve holes 301. There is a clamping cylinder 7, a transmission groove 302 is provided on the middle inner wall of the sleeve hole 301, a gear ring 8 is fixedly installed on the middle outer ring of the clamping cylinder 7, and the gear ring 8 is rotatably sleeved in the transmission groove 302, a driving wheel 9 is movably installed at the position of the hood 2 located in the middle of the back of the clamping device 3, and the driving wheel 9 is meshed with the gear ring 8 for transmission, and a transmission gear 10 for meshing transmission is movably installed between each gear ring 8 inside the clamping device 3, a clamping hole 701 is provided in the middle of the clamping cylinder 7, three slide grooves 702 are evenly provided on the inner wall of the clamping hole 701, and a clamping strip 11 is slidably sleeved inside the slide groove 702, and the three clamping strips 11 are equivalent to the triangular chuck on the machine tool, which can ensure that the magnetic core is stably clamped, and at the same time, because the clamping strip 11 is in the slide groove 702 The clamping hole 701 is a hollow cylindrical hole 704, which is provided with a plurality of springs 760, 770 and 780, which are provided with springs 771, 772 and 781. The outer surface of the core is preferably made of plastic or plastic, and the outer surface of the core is preferably made of plastic. The holding device 3 is located at the middle of the bottom wall of the sleeve hole 301, and a first hydraulic ring groove 304 is opened. The end of the first hydraulic ring groove 304 is movably sleeved with a first hydraulic ring block 12, and the end of the second hydraulic ring groove 703 is movably sleeved with a second hydraulic ring block 13. A ball 14 is slidably installed between the first hydraulic ring block 12 and the second hydraulic ring block 13. A connection relationship is formed between the clamping device 3 and the clamping cylinder 7 through the first hydraulic ring block 12, the second hydraulic ring block 13 and the ball 14, that is, when the hydraulic regulating cylinder 17 is pressurized, it finally acts on the first hydraulic ring block 12 at the end of the first hydraulic ring groove 304, so that the first hydraulic ring block 12 slides outward and presses the ball 14, thereby pressing the second hydraulic ring block 13 into the second hydraulic ring groove 703.Then, the hydraulic pressure is transmitted to the clamping strip 11, causing it to slide outside the slide groove 702 and clamp the magnetic core. In this way, the movement and adjustment of the first hydraulic ring block 12 can drive the second hydraulic ring block 13 to move and adjust synchronously. In addition, due to the existence of the ball 14, the first hydraulic ring block 12 and the second hydraulic ring block 13 can also rotate relative to each other, making it more convenient to drive the magnetic core to rotate together when the clamping cylinder 7 rotates.

[0032] Embodiment 2

[0033] See also Figure 3-Figure 8A hydraulic chamber 303 is provided in the middle of the clamping device 3, and the hydraulic chamber 303 is connected to the first hydraulic ring grooves 304 on all sides. A hydraulic adjustment cylinder 17 is fixedly installed in the middle of the hydraulic chamber 303. The upper and lower ends of the hydraulic chamber 303 are at the same hydraulic pressure. The hydraulic pressure in the hydraulic chamber 303 is increased or decreased by the hydraulic adjustment cylinder 17, thereby realizing the clamping adjustment of the clamping strip 11. At the same time, the clamping of the magnetic core is controlled according to the hydraulic feedback. When the hydraulic pressure in the hydraulic chamber 303 and the first hydraulic ring groove 304 reaches a certain size when the hydraulic adjustment cylinder 17 is pressurized, it means that the clamping of the magnetic core is When the force reaches the standard requirement, end face grinding can be carried out. At the same time, when grinding the outer side of the magnetic core, the clamping force of the clamping strip 11 on the magnetic core is basically equal to zero through hydraulic feedback detection. At this time, the outer side grinding can be carried out. A circular hole 705 connected to the slide groove 702 is opened inside the middle section of the clamping tube 7. A sleeve column 15 with one end fixedly connected to the clamping strip 11 is movably sleeved inside the circular hole 705. A compression spring 16 is fixedly connected between the sleeve column 15 and the inner wall of the circular hole 705. The setting of the sleeve column 15 plays a supporting and stabilizing role on the middle part of the clamping strip 11 on the one hand, preventing the hydraulic blocks 1101 at both ends of the clamping strip 11 from being spaced apart. On the other hand, the compression spring 16 and the sleeve 15 cooperate to play a role of buffering and shock absorption, effectively reducing the impact of vibration during grinding. The rotation direction of the clamping cylinder 7 is opposite to that of the grinding disc 6. The grinding disc 6 rotates at the same time as the clamping cylinder 7 when grinding the end face of the magnetic core, and the rotation speed of the clamping cylinder 7 is less than the rotation speed of the grinding disc 6. In this way, when grinding the end face of the magnetic core, the magnetic core is rotated and polished by the grinding disc 6 while rotating, so that the rotation speed of the magnetic core itself is faster than that of the grinding disc 6, thereby improving the grinding speed. On the other hand, by clamping The cylinder 7 drives the magnetic core to rotate, and can fully and evenly contact the end face of the magnetic core in the radial direction of the grinding disk 6 to ensure the grinding quality of the end face of the magnetic core. The grinding disk 6 no longer rotates when clamping the two ends of the magnetic core. At the same time, the adjusting device 4 slides intermittently up and down along the sliding groove 102. After the end face of the magnetic core is polished, the grinding disk 6 clamps the magnetic core. At this time, the upper and lower grinding disks 6 constitute a clamp, which drives the upper and lower adjusting devices 4 to move up and down synchronously, that is, drives the magnetic core to move up and down, and stays for a period of time after moving once, so that the rotating clamping cylinder 7 drives the clamping strip 11 to fully polish the outer side of the magnetic core.

[0034] See also Figure 1-Figure 8 , also includes a magnetic core grinding process, the steps are:

[0035] S1, the start-up device first controls the adjusting device 4 to slide up and down to the maximum position, and then inserts the magnetic core into the clamping hole 701 on the clamping device 3. When all the clamping tubes 7 are sleeved with magnetic cores, the adjusting device 4 is controlled to move toward the middle and adjust the center of the magnetic core to the same height as the center of the clamping device 3. Then, the hydraulic pressure is applied by the hydraulic adjusting cylinder 17 and the clamping strip 11 is driven to clamp the magnetic core through transmission;

[0036] S2. Ensure that there is a rotation gap between the magnetic core and the upper and lower grinding discs 6, and then use the grinding discs 6 to rotate and grind the upper and lower end faces of the magnetic core. During this process, the clamping force of the clamping strip 11 is maintained. At the same time, the driving wheel 9 drives the clamping cylinder 7 to rotate in the opposite direction through transmission, driving the magnetic core to rotate while being rotated by the grinding disc 6. During grinding, the adjustment device 4 can also be adjusted to slide to achieve different grinding effects on the end faces of the magnetic core;

[0037] S3, after the grinding of both end surfaces of the magnetic core is completed, the adjusting device 4 is controlled to move toward the middle and clamp the magnetic core, and at the same time, the grinding disc 6 stops rotating and the hydraulic adjusting cylinder 17 controls the hydraulic pressure to release, just so that the clamping force of the clamping strip 11 on the outer side of the magnetic core disappears, and then the two adjusting devices 4 are controlled to move up and down synchronously and intermittently, so that the clamping strip 11 grinds the outer surface of the magnetic core. During this process, the clamping tube 7 is in a rotating state and the magnetic core does not rotate;

[0038] S4. After grinding, the hydraulic adjustment cylinder 17 controls the hydraulic pressure to be released to the maximum position. At the same time, the top adjustment device 4 moves upward to drive the grinding disc 6 to rise synchronously. The ground magnetic cores are removed from the clamping tube 7, and then the previous steps are repeated to grind the next batch of magnetic cores.

[0039] Working principle: first control the adjusting device 4 to slide up and down in the sliding groove 102 to the maximum position, and then insert the magnetic core into the clamping hole 701. After all the magnetic cores are placed in the clamping hole 701, the upper and lower adjusting devices 4 move toward the middle at the same time, driving the magnetic core and the center of the clamping device 3 to be basically at the same height. At this time, the hydraulic pressure in the hydraulic chamber 303 is controlled to increase by the hydraulic adjusting cylinder 17, and the hydraulic pressure in the second hydraulic ring groove 703 is synchronously increased through the transmission of the first hydraulic ring block 12 and the second hydraulic ring block 13, and acts on the clamping strip 11 through the hydraulic port 704 and the hydraulic block 1101, driving the clamping strip 11 on the sliding groove 702 to clamp the magnetic core toward the middle, and stop pressurizing and maintain the clamping force when the clamping force is large enough according to the hydraulic feedback detection;

[0040] Then, the driving motor 5 is started to drive the grinding disc 6 to rotate. Since there is a gap between the grinding disc 6 and the end face of the magnetic core, the end face of the magnetic core can be ground when the grinding disc 6 rotates. At the same time, the driving wheel 9 is also in a rotating state, and the gear rings 8 in the clamping device 3 are driven to rotate through meshing transmission, that is, the clamping cylinder 7 and the clamped magnetic core are driven to rotate synchronously. The rotation direction of the magnetic core is opposite to that of the grinding disc 6. On the one hand, the grinding speed is increased considerably. On the other hand, the rotation of the magnetic core also makes all parts of its end face fully contact with the grinding disc 6, avoiding the situation that the end of the magnetic core is close to the center of the grinding disc 6 and the grinding effect is poor. At the same time, when grinding the end face, the grinding disc 6 can be kept still for light grinding, or the two adjustment devices 4 can be controlled to move closer to the middle during grinding for heavy grinding.

[0041] When the end surface of the magnetic core is polished, the hydraulic adjustment cylinder 17 controls the hydraulic pressure in the hydraulic chamber 303 to reduce, thereby driving the clamping strip 11 to reduce the clamping force on the magnetic core. It is necessary to ensure that the inner side of the clamping strip 11 is still in contact with the magnetic core, and then the two ends of the magnetic core are clamped by controlling the adjustment device 4 to move toward the middle at the same time, and then the two adjustment devices 4 are controlled to move up and down intermittently as a whole, and stay for a certain time each time they move a certain distance. During this process, the driving wheel 9 still drives the clamping cylinder 7 to rotate, thereby driving the clamping strip 11 to rotate to polish the outer side of the magnetic core;

[0042] When the core is polished, first move the adjustment device 4 up and down to loosen the core, and then use the hydraulic adjustment cylinder 17 to drive the hydraulic pressure to retract the clamping strip 11 into the slide groove 702, and then remove the polished core. After all are removed, repeat the previous steps to carry out the next core polishing.

[0043] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0044] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A magnetic core grinding machine for preparing crack-proof magnetic cores, comprising a machine base (1), characterized in that: A hood (2) is fixedly mounted on the top of the machine base (1), a clamping device (3) is fixedly mounted in the middle of the machine base (2), sliding grooves (102) are symmetrically provided on the two side walls of the machine base (2), and adjustment devices (4) are movably mounted on the upper and lower ends of the sliding grooves (102) located at the clamping device (3), respectively, a driving motor (5) is fixedly mounted in the middle of the adjustment device (4), and a grinding disc (6) is fixedly connected to the output shaft of the driving motor (5), a collecting groove (101) is provided in the middle of the top surface of the machine base (1), and the middle of the clamping device (3) is evenly opened in an annular shape. A sleeve hole (301) is provided, a clamping tube (7) is movably sleeved inside the sleeve hole (301), a transmission groove (302) is provided on the middle inner wall of the sleeve hole (301), a gear ring (8) is fixedly mounted on the middle outer ring of the clamping tube (7), and the gear ring (8) is rotatably sleeved in the transmission groove (302), a driving wheel (9) is movably mounted on the cover (2) at a position in the middle of the back of the clamping device (3), and the driving wheel (9) is meshed with the gear ring (8) for transmission, and a transmission gear (10) for meshing transmission is movably mounted between the gear rings (8) inside the clamping device (3); A clamping hole (701) is provided in the middle of the clamping cylinder (7), three slide grooves (702) are evenly provided on the inner wall of the clamping hole (701), a clamping strip (11) is slidably sleeved inside the slide groove (702), a second hydraulic ring groove (703) is provided inside both ends of the clamping cylinder (7), a hydraulic port (704) is provided between the second hydraulic ring groove (703) and the slide groove (702), and hydraulic blocks (1101) are provided at both ends of the clamping strip (11) and are movably sleeved inside the hydraulic port (704); The diameters of the two ends of the sleeve hole (301) are large, and the clamping device (3) is provided with a first hydraulic ring groove (304) in the middle of the bottom wall of the sleeve hole (301); a first hydraulic ring block (12) is movably sleeved at the end of the first hydraulic ring groove (304); a second hydraulic ring block (13) is movably sleeved at the end of the second hydraulic ring groove (703); and a ball (14) is slidably mounted between the first hydraulic ring block (12) and the second hydraulic ring block (13); A hydraulic chamber (303) is provided in the middle of the clamping device (3), and the hydraulic chamber (303) is connected to the first hydraulic ring grooves (304) on all sides. A hydraulic adjustment cylinder (17) is fixedly installed in the middle of the hydraulic chamber (303), and the upper and lower ends of the hydraulic chamber (303) are at the same hydraulic size.

2. A magnetic core grinding machine for preparing an anti-cracking magnetic core according to claim 1, characterized in that: A circular hole (705) communicating with the slide groove (702) is provided inside the middle section of the clamping cylinder (7), a sleeve column (15) having one end fixedly connected to the clamping strip (11) is movably sleeved inside the circular hole (705), and a compression spring (16) is fixedly connected between the sleeve column (15) and the inner wall of the circular hole (705).

3. The magnetic core grinding machine for preparing an anti-cracking magnetic core according to claim 1, characterized in that: The rotation direction of the clamping cylinder (7) is opposite to that of the grinding disc (6); the grinding disc (6) rotates simultaneously with the clamping cylinder (7) when grinding the end face of the magnetic core, and the rotation speed of the clamping cylinder (7) is lower than the rotation speed of the grinding disc (6); the grinding disc (6) stops rotating when clamping the two ends of the magnetic core, and the adjustment device (4) slides intermittently up and down along the sliding groove (102).

4. A grinding process of a magnetic core grinder for preparing an anti-cracking magnetic core according to claim 1, characterized in that: Here are the steps: S1, the start-up device first controls the adjustment device (4) to slide up and down to the maximum position, and then inserts the magnetic core into the clamping hole (701) on the clamping device (3). When all the clamping tubes (7) are sleeved with magnetic cores, the adjustment device (4) is controlled to move toward the middle and adjust the center of the magnetic core to the same height as the center of the clamping device (3). Then, the hydraulic pressure is applied by the hydraulic adjustment cylinder (17) and the clamping strip (11) is driven by the transmission to clamp the magnetic core. S2. Ensure that there is a rotational gap between the magnetic core and the upper and lower grinding discs (6), and then use the grinding discs (6) to rotate and grind the upper and lower end surfaces of the magnetic core. During this process, the clamping force of the clamping strip (11) is maintained. At the same time, the driving wheel (9) drives the clamping cylinder (7) to rotate in the opposite direction through transmission, driving the magnetic core to rotate while being rotated and grinded by the grinding discs (6). During grinding, the adjustment device (4) can also be adjusted to slide to achieve different grinding effects on the end surfaces of the magnetic core; S3, after the grinding of both end surfaces of the magnetic core is completed, the adjusting device (4) is controlled to move toward the middle and clamp the magnetic core, while the grinding disc (6) stops rotating and the hydraulic adjusting cylinder (17) controls the hydraulic pressure to release, just enough to make the clamping force of the clamping strip (11) on the outer side of the magnetic core disappear, and then the two adjusting devices (4) are controlled to move up and down synchronously and intermittently, so that the clamping strip (11) grinds the outer surface of the magnetic core. During this process, the clamping tube (7) is in a rotating state and the magnetic core does not rotate; S4. After grinding is completed, the hydraulic adjustment cylinder (17) controls the hydraulic pressure to be released to the maximum position, and at the same time, the top adjustment device (4) moves upward to drive the grinding disc (6) to rise synchronously, and the ground magnetic core is removed from the clamping cylinder (7), and then the previous steps are repeated to grind the next batch of magnetic cores.

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