A silicon steel transformer core trimming tool

Abstract

This utility model discloses a tooling for trimming the core of a silicon steel sheet transformer, including a processing table. A vertical plate is mounted on one side of the top of the processing table, and a cylinder A is mounted on one side of the vertical plate. A concave positioning frame is mounted at the output end of cylinder A. Two sets of concave frames are mounted on the top of the processing table. This utility model utilizes a grinding mechanism composed of a motor, rotating shaft A, rotating shaft B, drive component A, drive component B, and a transmission belt to grind the core of the silicon steel sheet transformer. The cooperation of cylinder A, the concave positioning frame, cylinder B, a pressure plate, and a T-shaped limiting rod ensures stable positioning of the core, preventing movement during grinding. The inclusion of a vacuum cleaner, a funnel, and a through-hole allows for timely collection of grinding chips and dust. A cleaning door on the surface of the vacuum cleaner and a cabinet door on the side of the processing table facilitate cleaning of the dust inside the vacuum cleaner.

Description

Technical Field

[0001] This utility model relates to the field of transformer core technology, specifically a tooling for trimming silicon steel sheet transformer cores. Background Technology

[0002] During the manufacturing process of silicon steel sheet transformer cores, some burrs will be generated on the surface of the cores. The burrs on the cores need to be trimmed to facilitate subsequent use.

[0003] In the traditional silicon steel sheet transformer core grinding process, manual hand-held grinding tools or simple mechanical devices are often used for grinding. The manual grinding method relies on operators holding tools such as grinding wheels and relying on experience to grind the surface of the core.

[0004] However, manual hand-held grinding tools or simple mechanical devices are inefficient and cannot meet the needs of large-scale production. Furthermore, the grinding process relies on manual operation or simple fixing devices, resulting in unstable grinding accuracy and significant differences in grinding effects between different operators or different batches of iron cores.

[0005] In view of this, we have introduced a tooling for trimming the core of silicon steel sheet transformers. Utility Model Content

[0006] The purpose of this utility model is to provide a tooling for trimming the core of a silicon steel sheet transformer to solve the problems mentioned in the background art.

[0007] To achieve the above objectives, this utility model provides the following technical solution: a silicon steel sheet transformer core trimming fixture, comprising: a processing table, a vertical plate provided on one side of the top of the processing table, a cylinder A provided on one side of the vertical plate, and a concave positioning frame provided at the output end of the cylinder A;

[0008] A concave frame is provided on the top of the processing table, and there are two sets of concave frames.

[0009] Cylinder B is located on top of the concave positioning frame, and a pressure plate is connected to the output end of cylinder B inside the concave positioning frame.

[0010] The inner sides of the two sets of concave frames are equipped with a grinding mechanism. The grinding mechanism is driven by a motor to rotate shaft A, rotating shaft B and grinding roller in a coordinated manner so that the silicon steel sheet transformer core is ground on the surface of the concave frame.

[0011] Preferably, the grinding mechanism includes a set of driving components A connected to the top of a concave frame, and another set of driving components B connected to the top of the concave frame, with a transmission belt connecting the driving components A and B.

[0012] Drive component A and drive component B are respectively fixed on the top of two sets of concave frames. They are equipped with pulley structures inside, and the transmission belt is tensioned between the two pulleys to form a belt drive system. This transmission method has the advantages of simple structure, smooth transmission and low noise. It can stably transmit the power of the motor to the rotating shaft B, ensure that the rotation speed of the two rotating shafts is consistent, and make the grinding roller evenly grind the surface of the iron core, avoiding the problem of uneven grinding caused by inconsistent rotation speed.

[0013] Alternatively, a sprocket and chain can be used for transmission, making it easier to select the appropriate option based on the actual situation.

[0014] The motor is connected to the top of one set of concave frames. The rotating shaft A is connected to the output end of the motor and passes through the drive component A before connecting to the top of the concave frame. The rotating shaft B is connected to the inner side of another set of concave frames, and the top of the rotating shaft B passes through the concave frame and is fixedly connected to the drive component B. The grinding rollers are detachably connected to the surfaces of rotating shaft A and rotating shaft B respectively. The motor is fixed to the top of the concave frame by a bracket, and its output shaft is rigidly connected to rotating shaft A by a coupling to ensure reliable power transmission. Rotating shaft A passes through the center of the pulley of drive component A and is connected by a key to achieve power transmission. Its lower end is installed in the concave frame by a bearing to ensure smooth rotation. Rotating shaft B is also installed in the inner side of another set of concave frames by a bearing. Its upper end passes through the concave frame and is fixedly connected to the pulley of drive component B, and its lower end is supported on the bearing. The grinding rollers are installed on rotating shaft A and rotating shaft B by bolts or other detachable methods, which facilitates the replacement of different models of grinding rollers after wear to adapt to different grinding needs.

[0015] Preferably, the concave positioning frame is connected to a T-shaped limiting rod on its side, and the T-shaped limiting rod passes through the upright plate. One end of the T-shaped limiting rod is fixedly connected to the side of the concave positioning frame, and the other end passes through the hole opened in the upright plate to form a limiting structure. When the cylinder A drives the concave positioning frame to move left and right, the T-shaped limiting rod slides in the hole in the upright plate to limit the movement direction of the concave positioning frame.

[0016] Preferably, the surface of the processing table is provided with a through hole, which is located on the surface of the processing table between the two sets of concave frames. Its diameter matches the lower end of the funnel and is used to introduce iron filings and dust generated during the grinding process into the vacuum cleaner. The location of the through hole is reasonably designed to ensure that the waste generated during grinding falls into the funnel in a timely manner, avoiding accumulation on the surface of the processing table and affecting the grinding quality of the iron core and the normal operation of the tooling.

[0017] Preferably, a vacuum cleaner is bolted to the inside of the processing table. A funnel is connected to the top of the vacuum cleaner, and the funnel is aligned with the through hole. The vacuum cleaner is installed in the cavity inside the processing table and fixed to the bottom plate of the processing table with bolts to ensure that it will not vibrate or shift during operation. The upper end of the funnel is aligned with the through hole, and the lower end is connected to the air inlet of the vacuum cleaner, forming a waste collection channel. When iron filings and dust generated by grinding fall into the funnel through the through hole, they are sucked in by the negative pressure generated by the vacuum cleaner and collected inside the vacuum cleaner, keeping the surface of the processing table clean, reducing the health hazards of dust to operators, and preventing dust accumulation from affecting the normal operation of the tooling.

[0018] Preferably, the vacuum cleaner has a cleaning door on its surface, which is located on the side of the vacuum cleaner and connected to the vacuum cleaner body via a hinge. The door is equipped with a sealing strip to ensure the vacuum cleaner's airtightness. When a certain amount of dust and metal filings are collected inside the vacuum cleaner, the cleaning door can be opened to easily remove the waste, maintain the vacuum cleaner's suction efficiency, and avoid affecting the normal operation of the vacuum cleaner due to excessive waste.

[0019] Preferably, the processing table has a cabinet door on its side surface for cleaning the dust inside the vacuum cleaner. The cabinet door is located on the side of the processing table and corresponds to the cleaning door of the vacuum cleaner. It is installed on the processing table by hinges and has a handle for easy opening and closing. After opening the cabinet door, the cleaning door of the vacuum cleaner can be operated directly to easily clean the dust and iron filings inside the vacuum cleaner without disassembling other parts of the processing table, thus improving the maintenance convenience of the tooling.

[0020] Preferably, the top of the processing table is provided with a baffle, which is vertically fixed to the edge of the top of the processing table and surrounds the grinding area to form a protective structure. Its function is to prevent iron filings and dust generated during the grinding process from splashing outside the processing table, polluting the working environment or causing injury to the operator. The baffle is made of metal material and has a certain height and strength, which can effectively block the splashes, while not affecting the operator's observation and operation of the grinding process. Alternatively, a transparent acrylic plate can be provided to facilitate the operator's viewing.

[0021] Preferably, bearings are connected to the bottom of rotating shaft A and rotating shaft B. The bearings are embedded inside the concave frame. The bearings are selected as deep groove ball bearings or other bearing types suitable for high-speed rotation. They are embedded in the bearing holes at the bottom of the concave frame. The lower ends of rotating shaft A and rotating shaft B are inserted into the inner rings of the bearings. Through the support of the bearings, the frictional resistance of the rotating shafts during rotation is reduced, ensuring high-speed rotation and stable operation of the rotating shafts. At the same time, the heat and noise generated by friction are reduced, and the service life of the rotating shafts and concave frame is extended.

[0022] Compared with the prior art, the beneficial effects of this utility model are:

[0023] (1) The grinding mechanism, consisting of a motor, rotating shaft A, rotating shaft B, drive component A, drive component B and transmission belt, can achieve stable and efficient grinding of silicon steel sheet transformer core. The design of disassembling and connecting the grinding roller makes it convenient to replace the appropriate grinding roller according to different grinding needs, thereby improving grinding accuracy and applicability.

[0024] (2) Through the cooperation of cylinder A, concave positioning frame, cylinder B, pressure plate and T-shaped limit rod, the iron core can be stably positioned to prevent the iron core from moving during the grinding process, ensuring the grinding quality and improving the safety of operation.

[0025] (3) By setting up a vacuum cleaner, funnel and through hole, the iron filings and dust generated during grinding can be collected in time, keeping the working environment clean, reducing dust pollution, and benefiting the health of operators.

[0026] (4) The cleaning door on the surface of the vacuum cleaner and the cabinet door on the side of the processing table make it easy to clean the dust inside the vacuum cleaner, reduce the difficulty of equipment maintenance and extend the service life of the equipment. Attached Figure Description

[0027] Figure 1 This is a schematic diagram of the structure of the present invention when disassembled in three dimensions;

[0028] Figure 2 This is a schematic diagram of the overall connection of this utility model;

[0029] Figure 3 This is a schematic diagram of the concave frame and grinding mechanism of this utility model;

[0030] Figure 4 This is a schematic diagram of the front section of the processing table of this utility model.

[0031] In the diagram: 1. Processing table; 2. Cabinet door; 3. Through hole; 4. Baffle; 5. Vertical plate; 6. Cylinder A; 7. Concave positioning frame; 8. Pressure plate; 9. Cylinder B; 10. T-shaped limit rod; 11. Concave frame; 12. Grinding roller; 13. Motor; 14. Drive component A; 15. Transmission belt; 16. Drive component B; 17. Rotating shaft B; 18. Rotating shaft A; 19. Funnel; 20. Vacuum cleaner; 21. Cleaning door; 22. Bearing. Detailed Implementation

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

[0033] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installed", "equipped with", "sleeved with", "connected", etc., should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be a connection within two components. For those skilled in the art, the specific meaning of the above terms in this utility model can be understood according to the specific circumstances.

[0034] Please see Figure 1-4 This utility model provides a technical solution: a silicon steel sheet transformer core trimming fixture, comprising: a processing table 1, a vertical plate 5 is provided on one side of the top of the processing table 1, a cylinder A6 is provided on one side of the vertical plate 5, and a concave positioning frame 7 is provided at the output end of the cylinder A6. The processing table 1, as the basic load-bearing component of the entire fixture, is made of high-strength metal material and can withstand the vibration and pressure during the grinding process of the silicon steel sheet core, ensuring the overall stability of the fixture. The vertical plate 5 is vertically fixed on one side of the top of the processing table 1 to provide installation support for the cylinder A6. The cylinder A6 is connected to the vertical plate 5 by bolts, and its output end can extend and retract in the horizontal direction, driving the concave positioning frame 7 to move.

[0035] A concave frame 11 is provided on the top of the processing table 1, and there are two sets of concave frames 11, which are symmetrically distributed on the top of the processing table 1.

[0036] Cylinder B9 is located on top of the concave positioning frame 7, and a pressure plate 8 is connected to the output end of cylinder B9 inside the concave positioning frame 7. Cylinder B9 is installed at the center of the top of the concave positioning frame 7 and is connected to an external air source through an air pipe. It can drive the pressure plate 8 to move up and down. When the concave positioning frame 7 places the iron core, cylinder B9 is activated, and the pressure plate 8 moves downward to press the iron core tightly inside the concave positioning frame 7, forming a stable clamping structure to prevent the iron core from loosening due to vibration during the grinding process, thus ensuring grinding accuracy and operational safety.

[0037] The inner sides of the two sets of concave frames 11 are provided with a grinding mechanism. The motor 13 of the grinding mechanism drives the rotating shaft A18, rotating shaft B17 and grinding roller 12 to grind the silicon steel sheet transformer core on the surface of the concave frame 11.

[0038] The grinding mechanism includes a set of concave frame 11 with a driving component A14 connected to the top, and another set of concave frame 11 with a driving component B16 connected to the top. A transmission belt 15 is connected between the driving component A14 and the driving component B16.

[0039] Drive components A14 and B16 are fixed on the top of the two sets of concave frames 11 respectively. They are equipped with pulley structures inside. The transmission belt 15 is tensioned between the two pulleys to form a belt drive system. This transmission method has the advantages of simple structure, smooth transmission and low noise. It can stably transmit the power of the motor 13 to the rotating shaft B17, ensuring that the rotation speed of the two rotating shafts is consistent, so that the grinding roller 12 can evenly grind the surface of the iron core and avoid the problem of uneven grinding caused by inconsistent rotation speed.

[0040] Alternatively, a sprocket and chain can be used for transmission, making it easier to select the appropriate option based on the actual situation.

[0041] The motor 13 is connected to the top of one set of concave frames 11. The rotating shaft A18 is connected to the output end of the motor 13, and passes through the drive member A14 before connecting to the top of the concave frame 11. The rotating shaft B17 is connected to the inner side of another set of concave frames 11, and the top of the rotating shaft B17 passes through the concave frame 11 before being fixedly connected to the drive member B16. The grinding roller 12 is detachably connected to the surfaces of the rotating shaft A18 and the rotating shaft B17 respectively. The motor 13 is fixed to the top of the concave frame 11 by a bracket, and its output shaft is rigidly connected to the rotating shaft A18 by a coupling to ensure power transmission. To ensure reliable power transmission, the rotating shaft A18 passes through the center of the pulley of the drive component A14 and is connected by a key to achieve power transmission. Its lower end is mounted in the concave frame 11 through a bearing to ensure smooth rotation. The rotating shaft B17 is also mounted in the inner side of another set of concave frames 11 through a bearing 22. Its upper end passes through the concave frame 11 and is fixedly connected to the pulley of the drive component B16. Its lower end is supported on the bearing 22. The grinding roller 12 is mounted on the rotating shaft A18 and the rotating shaft B17 by bolts or other detachable means, which facilitates the replacement of different models of grinding roller 12 after wear to meet different grinding needs.

[0042] The concave positioning frame 7 is connected to a T-shaped limiting rod 10 on its side, and the T-shaped limiting rod 10 passes through the upright plate 5. One end of the T-shaped limiting rod 10 is fixedly connected to the side of the concave positioning frame 7, and the other end passes through the hole opened on the upright plate 5 to form a limiting structure. When the cylinder A drives the concave positioning frame 7 to move left and right, the T-shaped limiting rod 10 slides in the hole of the upright plate 5 to limit the movement direction of the concave positioning frame 7.

[0043] The surface of the processing table 1 is provided with a through hole 3. The through hole 3 is located on the surface of the processing table 1 between the two sets of concave frames 11. Its diameter matches the lower end of the funnel 19. It is used to introduce iron filings and dust generated during the grinding process into the vacuum cleaner 20. The opening position of the through hole 3 is reasonably designed to ensure that the waste generated during grinding falls into the funnel 19 in a timely manner, avoiding accumulation on the surface of the processing table 1, which would affect the grinding quality of the iron core and the normal operation of the tooling.

[0044] A vacuum cleaner 20 is bolted to the inside of the processing table 1. A funnel 19 is connected to the top of the vacuum cleaner 20, and the funnel 19 is aligned with the through hole 3. The vacuum cleaner 20 is installed in the cavity inside the processing table 1 and is fixed to the bottom plate of the processing table 1 with bolts to ensure that it will not vibrate or shift during operation. The upper end of the funnel 19 is aligned with the through hole 3, and the lower end is connected to the air inlet of the vacuum cleaner 20, forming a waste collection channel. When iron filings and dust generated by grinding fall into the funnel 19 through the through hole 3, they are sucked in by the negative pressure generated by the vacuum cleaner 20 and collected inside the vacuum cleaner 20, keeping the surface of the processing table 1 clean, reducing the health hazards of dust to the operators, and preventing dust accumulation from affecting the normal operation of the tooling.

[0045] The vacuum cleaner 20 has a cleaning door 21 on its surface. The cleaning door 21 is located on the side of the vacuum cleaner 20 and is connected to the body of the vacuum cleaner 20 by a hinge. The door is equipped with a sealing strip to ensure the airtightness of the vacuum cleaner 20. When the dust and iron filings inside the vacuum cleaner 20 accumulate to a certain amount, the cleaning door 21 can be opened to easily clean out the waste, maintain the vacuum cleaner 20's vacuuming efficiency, and avoid affecting the normal operation of the vacuum cleaner 20 due to excessive waste.

[0046] The processing table 1 has a cabinet door 2 on its side surface for cleaning the dust inside the vacuum cleaner 20. The cabinet door 2 is located on the side of the processing table 1 and corresponds to the cleaning door 21 of the vacuum cleaner 20. It is installed on the processing table 1 by hinges and has a handle for easy opening and closing. After opening the cabinet door 2, the cleaning door 21 of the vacuum cleaner 20 can be operated directly to clean the dust and iron filings inside the vacuum cleaner 20 without disassembling other parts of the processing table 1, which improves the maintenance convenience of the tooling.

[0047] A baffle 4 is provided on the top of the processing table 1. The baffle 4 is vertically fixed to the edge of the top of the processing table 1 and surrounds the grinding area to form a protective structure. Its function is to prevent iron filings and dust generated during the grinding process from splashing outside the processing table 1, polluting the working environment or causing injury to the operator. The baffle 4 is made of metal material and has a certain height and strength, which can effectively block the splashes. At the same time, it does not affect the operator's observation and operation of the grinding process. Alternatively, a transparent acrylic plate can be set to facilitate the operator's viewing.

[0048] The bottom of the rotating shaft A18 and the rotating shaft B17 are connected to a bearing 22. The bearing 22 is embedded inside the concave frame 11. The bearing 22 is a deep groove ball bearing or other bearing type suitable for high-speed rotation. It is embedded in the bearing hole at the bottom of the concave frame 11. The lower ends of the rotating shaft A18 and the rotating shaft B17 are inserted into the inner ring of the bearing 22. With the support of the bearing 22, the frictional resistance of the rotating shaft during rotation is reduced, ensuring the high-speed rotation and stable operation of the rotating shaft. At the same time, it reduces the heat and noise generated by friction and extends the service life of the rotating shaft and the concave frame 11.

[0049] In this utility model, the control of electrical components such as cylinder A6, cylinder B9, motor 13 and vacuum cleaner 20 can be automatic, such as PLC system control or microcontroller control, or it can be manually opened and closed by connecting switches to the control panel. The choice can be made flexibly according to the actual use situation, which will not be described in detail here.

[0050] Specifically, during use, the silicon steel sheet transformer core is placed horizontally inside the concave positioning frame 7 and below the pressure plate 8. The shape of the concave positioning frame 7 provides certain support and limitation for the core, stabilizing it initially in the grinding work area. Then, the cylinder B9 is activated, and the output shaft of the cylinder B9 extends downward, driving the pressure plate 8 to move vertically downward. During the descent of the pressure plate 8, the slider on the side of the pressure plate 8 slides into the concave positioning frame 7 to form a limit, so as to fix the core in place later. After the pressure plate 8 contacts the surface of the core, the cylinder B9 continuously applies a certain pressure to firmly fix the core on the concave positioning frame 7, preventing displacement during subsequent grinding and providing a stable foundation for precise grinding.

[0051] At this time, cylinder A6 is activated. As a power source, cylinder A6 drives the concave positioning frame 7 to move horizontally along the processing table 1 through the internal piston movement and the push of compressed air or hydraulic oil. When the concave positioning frame 7 is located between the two sets of concave frames 11, the action of cylinder A6 is stopped. The T-shaped limit rod 10 passes through the pre-opened limit hole on the vertical plate 5. The unique structural design of the T-shaped limit rod 10 makes it only able to move horizontally within the limit hole of the vertical plate 5, thereby ensuring that the concave positioning frame 7 will not deviate during the movement.

[0052] After positioning is completed, the grinding mechanism is started. The motor 13 is powered on and starts to run. As the core power component of the grinding mechanism, the output end of the motor 13 is tightly connected to the rotating shaft A18 through a coupling, which transmits the rotational power of the motor 13 to the rotating shaft A18, causing the rotating shaft A18 to rotate at high speed. The rotating shaft A18 passes through the drive component A14. The drive component A14 is generally a pulley structure. It has a keyway inside that matches the rotating shaft A18. Through the key connection, the rotation of the rotating shaft A18 can drive the drive component A14 to rotate synchronously.

[0053] Drive component A14 and drive component B16 are connected by a transmission belt 15. The transmission belt 15 is usually a rubber V-belt or synchronous belt, which has good elasticity and wear resistance. When drive component A14 rotates, the friction of the transmission belt 15 drives drive component B16 to rotate. Drive component B16 also has a pulley structure and is connected to the rotating shaft B17 by a key, thereby driving the rotating shaft B17 to rotate. As the rotating shafts A18 and B17 rotate, the grinding roller 12 rotates at high speed. The grinding material on its surface comes into close contact with the iron core surface, grinding and finishing the iron core surface, removing burrs, rust and other excess parts, so that it meets the specified dimensional and surface precision requirements.

[0054] During the polishing process, the iron filings and dust generated will fall downwards through the evenly spaced through holes 3 on the surface of the processing table 1 under the action of gravity and airflow. The funnel 19 installed inside the processing table 1 is precisely aligned with the through holes 3. The large-diameter design of the funnel 19 can effectively collect the waste falling from the through holes 3 and guide it to the vacuum cleaner 20 connected below. The vacuum cleaner 20 generates negative pressure through the internal fan, forming a strong suction force to suck the iron filings and dust into the dust collection chamber for collection.

[0055] When it is necessary to clean the dust inside the vacuum cleaner 20, the operator opens the cabinet door 2 on the side of the processing table 1 to expose the external structure of the vacuum cleaner 20. Then, the cleaning door 21 on the surface of the vacuum cleaner 20 is opened. The cleaning door 21 is generally connected by hinges. After opening, it can directly contact the dust collection chamber of the vacuum cleaner 20. The operator can use special cleaning tools, such as a brush, to clean the dust and iron filings in the dust collection chamber. After cleaning, the cleaning door 21 and the cabinet door 2 are closed to ensure that the vacuum cleaner 20 can work normally and continue to perform its waste collection function.

[0056] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A tooling for trimming the core of a silicon steel sheet transformer, characterized in that, include: A processing table (1) is provided with a vertical plate (5) on one side of the top of the processing table (1), and a cylinder A (6) is provided on one side of the vertical plate (5). A concave positioning frame (7) is provided at the output end of the cylinder A (6). A concave frame (11) is provided on the top of the processing table (1), and there are two sets of concave frames (11); Cylinder B (9), the cylinder B (9) is located on the top of the concave positioning frame (7), and the interior of the concave positioning frame (7) is connected to the output end of the cylinder B (9) with a pressure plate (8); The inner sides of the two sets of concave frames (11) are provided with a grinding mechanism. The motor (13) of the grinding mechanism drives the rotating shaft A (18), rotating shaft B (17) and grinding roller (12) to be set together so that the silicon steel sheet transformer core is ground on the surface of the concave frame (11).

2. The silicon steel sheet transformer core trimming fixture according to claim 1, characterized in that, The grinding mechanism includes a set of concave frame (11) connected to the top of a driving member A (14), and another set of concave frame (11) connected to the top of a driving member B (16). A transmission belt (15) is connected between the driving member A (14) and the driving member B (16). The motor (13) is connected to the top of a set of concave frames (11). The rotating shaft A (18) is connected to the output end of the motor (13) and passes through the drive member A (14) before being connected to the top of the concave frame (11). The rotating shaft B (17) is connected to the inner side of another set of concave frames (11), and the top of the rotating shaft B (17) passes through the concave frame (11) before being fixedly connected to the drive member B (16). The grinding roller (12) is detached and connected to the surfaces of the rotating shaft A (18) and the rotating shaft B (17) respectively.

3. The silicon steel sheet transformer core trimming fixture according to claim 1, characterized in that, The concave positioning frame (7) is connected to a T-shaped limiting rod (10) on its side, and the T-shaped limiting rod (10) penetrates through the upright plate (5).

4. The silicon steel sheet transformer core trimming fixture according to claim 1, characterized in that, The surface of the processing table (1) is provided with through holes (3).

5. The silicon steel sheet transformer core trimming fixture according to claim 1, characterized in that, The inside of the processing table (1) is connected to a vacuum cleaner (20) by bolts. The top of the vacuum cleaner (20) is connected to a funnel (19), and the funnel (19) is aligned with the through hole (3).

6. The silicon steel sheet transformer core trimming fixture according to claim 5, characterized in that, The surface of the vacuum cleaner (20) is provided with a cleaning door (21).

7. The silicon steel sheet transformer core trimming fixture according to claim 1, characterized in that, The processing table (1) has a cabinet door (2) on its side surface for cleaning the dust inside the vacuum cleaner (20).

8. The silicon steel sheet transformer core trimming fixture according to claim 1, characterized in that, The top of the processing table (1) is provided with a baffle (4).

9. A silicon steel sheet transformer core trimming fixture according to claim 2, characterized in that, The bottom of the rotating shaft A (18) and the rotating shaft B (17) are connected to a bearing (22), which is embedded in the interior of the concave frame (11).

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