High-speed precision punch for processing magnetic motor core

Abstract

The application discloses a high-speed precision punch press for processing of a magnetic motor core and relates to the technical field of punch presses. The punch press comprises a base, a rotating clamping column is connected to the middle of the top of the base, supporting rods are connected to the top of the rotating clamping column on the left and right sides, and one end of a threaded rod is rotationally connected to the inside center of the supporting rod. The punch press has the following advantages. The punch press is capable of staggered replacement during feeding, and the feeding time is reduced. The threaded rod is driven to rotate by rotating the rotating ring, and the two moving seats are driven to move horizontally along the axial direction. The two ends of the connecting rod are connected to the moving seats and the extrusion strips through hinges. The extrusion strips on the corresponding positions are driven to move outward by the connecting rod, the hollow part in the middle of the coiled material is extruded, the coiled material is fixed on the supporting rods, the rubber pads are used to avoid deformation of the coiled material, and the friction force is increased.

Description

TECHNICAL FIELD

[0001] The application relates to the technical field of punch machines, in particular to a high-speed precision punch machine for processing a magnetic motor core. BACKGROUND

[0002] The magnetic motor core is a core magnetic component of a magnetic motor, and a high-speed precision punch machine is used for continuously punching a coiled metal plate, and the processing efficiency and precision directly determine the overall performance of the magnetic motor.

[0003] The existing punch machine fixing structure of the coiled material mainly depends on a bolt pressing or a simple chuck, the former directly presses the coiled material inner hole wall through a bolt to realize fixing, but the bolt contact area is small, and the coiled material inner hole wall is prone to deformation, the latter clamps the coiled material through a chuck claw, but the chuck claw is mainly made of metal, and the friction with the coiled material inner hole wall is insufficient, in the high-speed feeding process, the coiled material is prone to axial deviation along the feeding rack, and even the whole coiled material slides off, which not only causes the subsequent punching position deviation, but also may cause the equipment jamming failure, and the size of the coiled material is not uniform, and frequent replacement wastes a long time, therefore, the application provides a high-speed precision punch machine for processing a magnetic motor core. SUMMARY

[0004] The application aims to provide a high-speed precision punch machine for processing a magnetic motor core.

[0005] In order to achieve the above-mentioned purpose, the application provides the following technical scheme: a high-speed precision punch machine for processing a magnetic motor core, comprising a base, a rotating clamping column is connected to the top middle of the base, support rods are connected to the top front and back of the rotating clamping column, one end of a threaded rod is rotationally connected to the inside center of the support rod, a rotating ring is connected to the end of the threaded rod away from the rotating clamping column, the rotating ring is located on the outside of the support rod, two moving seats are connected to the outside of the threaded rod, one end of a plurality of connecting rods is connected to the outside of the moving seat through a hinge, an extrusion strip is connected to the other end of the connecting rod through a hinge, a rubber pad is connected to the side of the extrusion strip away from the rotating clamping column, a plurality of accommodation grooves matched with the extrusion strip are formed on the outside of the support rod, a feeding rack is arranged on the left side of the base, and a punch machine body is arranged on the left side of the feeding rack.

[0006] As a further scheme of the application, a connecting shaft is connected to the top and left and right sides of the feeding rack, a flattening roller is connected to the front end outside of the connecting shaft, a gear two is connected to the middle side of the rear end of the two connecting shafts on the bottom, a gear one is connected to the rear end outside of the two connecting shafts on the top, and the gear one and the gear two on the same side are in meshing connection.

[0007] As a further scheme of the present application, the rear end of the bottom two connecting shafts is connected with a belt pulley, the two belt pulleys are connected through a belt, the rear end of the right bottom connecting shaft is connected with the driving end of a motor, and the motor is connected to the rear side of the flattening frame through a support.

[0008] As a further scheme of the present application, the rear side of the flattening frame is connected with an electric push rod through a support in the middle, the driving end of the electric push rod is connected with a connecting block, the front side of the connecting block is connected with a bearing, and the front side of the bearing is connected with a middle shaft.

[0009] As a further scheme of the present application, the outer side of the middle shaft is provided with an adjusting wheel, the inner side of the adjusting wheel is connected with a plurality of clamping strips, and the outer side of the middle shaft is provided with a plurality of clamping grooves matched with the clamping strips.

[0010] As a further scheme of the present application, the outer side of the front end of the middle shaft is threadedly connected with a fastening nut, and the fastening nut is located on the front side of the adjusting wheel.

[0011] As a further scheme of the present application, the top of the flattening frame is provided with a through groove matched with the middle shaft.

[0012] As a further scheme of the present application, the threaded rod, the moving seat, the connecting rod and the extrusion strip form a "coil self-adaptive fixing and anti-deformation" function: the pitch of the threaded rod is 2-5 mm, the rotating ring can drive the two moving seats to move relatively in the axial direction, the moving stroke is 10-30 mm, and then the extrusion strip is extended or retracted from the storage groove through the connecting rod, and the extension length adjustment range is 5-20 mm; the rubber pad on the side of the extrusion strip away from the rotating clamping column adopts flexible rubber with a Shore hardness of 50-60A and a thickness of 3-5 mm, and the friction coefficient with the inner hole wall of the coil is greater than or equal to 0.4, which can adapt to different specifications of coils with an inner hole diameter of 50-150 mm; after extrusion fixing, the axial offset of the coil is less than or equal to 0.1 mm, and the radial runout is less than or equal to 0.05 mm, which avoids the coil from slipping or deforming when feeding at high speed (feeding speed 10-30 m / min), and ensures the subsequent punching position accuracy.

[0013] As a further scheme of the present application: the output power of the motor is 0.5-1.5kW, the speed regulation range is 50-200r / min, the bottom connecting shaft is driven to rotate through the belt pulley, and then the meshing transmission (transmission ratio 1:1) of gear one and gear two is used to make the top and bottom connecting shafts rotate synchronously and reversely, so as to drive the flattening roller to exert a flattening pressure of 0.5-2N / cm² on the coiled material; the surface roughness Ra of the flattening roller is ≤0.8μm, and the roller surface runout is ≤0.03mm, so that the coiled material surface wrinkle can be flattened to a height difference of ≤0.1mm; at the same time, the coiled material transmission speed is adapted to the punching frequency (50-200 times / min) of the punch body, the transmission speed fluctuation is ≤±0.5m / min, the coiled material feeding position deviation is ≤0.05mm, and the punching precision of the magnetic motor core is improved.

[0014] As a further scheme of the present application: the electric push rod, the adjusting wheel and the middle shaft and the clamping strip form a "coiled material tension adjustment-adjusting wheel convenient replacement" function: the telescopic range of the electric push rod is 50-150mm, and the telescopic speed is 5-15mm / s, which can drive the adjusting wheel to move up and down along the through groove, the contact pressure adjustment range of the adjusting wheel and the coiled material is 0.3-1.5N / cm², the precise control of the coiled material tension (5-20N) is realized, and the coiled material stretching deformation caused by excessive tension or feeding jam caused by too small tension is avoided; the adjusting wheel is quickly positioned (positioning deviation ≤0.02mm) through the clamping groove of the clamping strip and the middle shaft, locked with the fastening nut (thread specification M8-M12), and the disassembly and assembly time is ≤30s; different diameters (50-100mm) of the adjusting wheel can be replaced according to the coiled material thickness (0.1-1mm), various processing requirements are adapted, and the universality of the device is improved.

[0015] Compared with the prior art, the beneficial effects of the present application are as follows:

[0016] 1. The base and the rotating clamping column are cooperatively arranged, so that the device can be staggered and replaced during feeding, the feeding time is reduced, the threaded rod is driven to rotate by rotating the rotating ring, the two moving seats are horizontally moved along the axial direction, the moving seats are moved, the corresponding clamping strips are moved outward through the driving of the connecting rods, the hollow part in the middle of the coiled material is clamped, the coiled material is fixed on the supporting rod, the rubber pad is used to avoid deformation of the coiled material, the friction force is increased, and the coiled material is prevented from moving outward or even falling off during feeding;

[0017] 2. The application drives the connecting block to move downward by the electric push rod, so that the middle shaft and the adjusting wheel connected therewith move downward synchronously to adjust the tension of the coiled material, when the adjusting wheel is replaced, only the fastening nut is rotated to remove the limiting of the adjusting wheel, and then the adjusting wheel is moved outward, when installed, only the plurality of clamping strips are inserted into the clamping grooves, and the fastening nut is rotated to complete the installation, and the replacement is convenient. BRIEF DESCRIPTION OF DRAWINGS

[0018] Figure 1 is the overall schematic diagram in the embodiment of the application;

[0019] Figure 2 is the internal moving seat linkage structure schematic diagram of the support rod in the embodiment of the application;

[0020] Figure 3 is the pulley position schematic diagram in the embodiment of the application;

[0021] Figure 4 is the clamping strip position schematic diagram in the embodiment of the application.

[0022] In the figure: 1, base; 2, rotating clamping column; 3, support rod; 4, threaded rod; 5, rotating ring; 6, moving seat; 7, connecting rod; 8, extruded strip; 9, rubber pad; 10, storage groove; 11, flattening frame; 12, connecting shaft; 13, flattening roller; 14, gear one; 15, gear two; 16, pulley; 17, motor; 18, electric push rod; 19, connecting block; 20, bearing; 21, middle shaft; 22, adjusting wheel; 23, clamping strip; 24, clamping groove; 25, fastening nut; 26, through groove; 27, punch main body. DETAILED DESCRIPTION

[0023] The specific embodiments of the application are further described below in conjunction with the accompanying drawings, and it should be noted that the description of the embodiments is used to help understand the application, but does not constitute a limitation on the application.

[0024] In addition, the technical features involved in each of the embodiments of the application described below can be combined with each other as long as there is no conflict.

[0025] Please refer to the accompanying drawings Figure 1 - the accompanying drawings Figure 4The application discloses a high-speed precision punch press for processing a magnetic motor core, which comprises a base 1, a rotating clamping column 2 connected to the middle of the top of the base 1, support rods 3 connected to the top of the rotating clamping column 2 on the front and back sides, one end of a threaded rod 4 rotatably connected to the inside center of the support rod 3, a rotating ring 5 connected to the end of the threaded rod 4 away from the rotating clamping column 2, the rotating ring 5 located on the outside of the support rod 3, two moving seats 6 connected to the outside of the threaded rod 4, one end of a plurality of connecting rods 7 connected to the outside of the moving seat 6 through a hinge, the other end of the connecting rod 7 connected to an extrusion strip 8 through a hinge, a rubber pad 9 connected to the side of the extrusion strip 8 away from the rotating clamping column 2, a plurality of storage grooves 10 matched with the extrusion strip 8 are formed on the outside of the support rod 3, a flattening frame 11 is arranged on the right side of the base 1, and a punch press body 27 is arranged on the right side of the flattening frame 11.

[0026] Embodiment one

[0027] The top and the left and right sides of the flattening frame 11 are connected with connecting shafts 12, the front end of the connecting shaft 12 is connected with a flattening roller 13, the middle side of the rear end of the two connecting shafts 12 at the bottom is connected with a gear two 15, the rear end of the outside of the two connecting shafts 12 at the top is connected with a gear one 14, the gear one 14 and the gear two 15 on the same side are in meshing connection, the rear end of the outside of the two connecting shafts 12 at the bottom is connected with a belt pulley 16, the two belt pulleys 16 are connected through a belt, the rear end of the left bottom connecting shaft 12 is connected with the driving end of a motor 17, and the motor 17 is connected to the rear side of the flattening frame 11 through a support.

[0028] Specifically, the flattening roller 13 is driven to rotate through the transmission of the motor 17, the two belt pulleys 16, the gear one 14, the gear two 15 and the plurality of connecting shafts 12, the coiled material is flattened, and the coiled material is transmitted to move to the punch press body 27.

[0029] Embodiment two

[0030] The rear side of the flattening frame 11 is connected with an electric push rod 18 through a support, the driving end of the electric push rod 18 is connected with a connecting block 19, the front side center of the connecting block 19 is connected with a bearing 20, the front side of the bearing 20 is connected with a middle shaft 21, the outside of the middle shaft 21 is provided with an adjusting wheel 22, the inside of the adjusting wheel 22 is connected with a plurality of clamping strips 23, a plurality of clamping grooves 24 matched with the clamping strips 23 are formed on the outside of the middle shaft 21, a fastening nut 25 is threadedly connected to the front end of the outside of the middle shaft 21, the fastening nut 25 is located on the front side of the adjusting wheel 22, and a through groove 26 matched with the middle shaft 21 is formed in the middle of the top of the flattening frame 11.

[0031] Specifically, the connecting block 19 is driven downward by the electric push rod 18, so that the middle shaft 21 and the adjusting wheel 22 connected thereto are synchronously lowered, and the tension of the coiled material is adjusted. When the adjusting wheel 22 is replaced, the fastening nut 25 is only needed to be rotated to remove the limiting of the adjusting wheel 22, and then the adjusting wheel 22 is moved outward. When the adjusting wheel 22 is installed, the plurality of clamping strips 23 are only needed to be inserted into the clamping grooves 24, and the fastening nut 25 is rotated to complete the installation.

[0032] Embodiment three

[0033] The guiding plate is arranged on one side of the support rod 3 corresponding to the soothing frame 11, and the rotating bearing is arranged in the base 1 corresponding to the rotating clamping column 2. The rotating clamping column 2 is rotationally connected with the base 1 through the rotating bearing, and the support rods 3 on the top of the rotating clamping column 2 are symmetrically distributed in 180°. Each support rod 3 is matched with the threaded rod 4, the rotating ring 5, the moving seat 6, the connecting rod 7, the extrusion strip 8 and the rubber pad 9.

[0034] Specifically, when the coiled material on one of the support rods 3 is about to be completely conveyed, the positioning bolt on the side of the base 1 is loosened, the rotating clamping column 2 is rotated around the rotating bearing, the other support rod 3 with the coiled material is rotated to the working position aligned with the guiding plate, and then the rotating clamping column 2 is locked by tightening the positioning bolt. The whole material changing process does not need to stop, and the time consumption is ≤30s. The coiled material on the new support rod 3 can be quickly connected with the smoothing roller 13 through the guiding plate, the feeding interruption time is ≤5s, the punching operation of the punch body 27 is continuously carried out, and the efficiency loss caused by material changing is reduced.

[0035] Embodiment four

[0036] The number of the receiving grooves 10 on the outer side of the support rod 3 is 4-6, and they are uniformly distributed along the circumferential direction of the support rod 3. The depth of the receiving groove 10 is 10-15mm, and the width is matched with the thickness of the extrusion strip 8. The length of the extrusion strip 8 is 30-50mm. The rubber pad 9 is fixed on the outer side end face of the extrusion strip 8 by high-temperature resistant glue.

[0037] Specifically, for different specifications of the coiled material with the inner hole diameter of 50-150mm, the rotating ring 5 drives the threaded rod 4 to rotate, the moving seat 6 moves along the axial direction and pushes the extrusion strip 8 out of the receiving groove 10 through the connecting rod 7. The extension length can be adjusted in the range of 5-20mm. The deformation amount of the rubber pad 9 after being pressed is 0.5-1mm, and the contact pressure with the inner hole wall of the coiled material is maintained at 0.2-0.5MPa. The deformation of the inner hole of the coiled material due to excessive local pressure is avoided, and the friction coefficient between the rubber pad 9 and the coiled material can prevent the coiled material from being axially deviated along the support rod 3 at high speed, so as to ensure the position accuracy in the subsequent smoothing and punching processes.

[0038] In the application, the threaded rod 4, the moving seat 6, the connecting rod 7 and the extrusion strip 8 form the "coil adaptive fixing and deformation prevention" function: the pitch of the threaded rod 4 is 2-5 mm, the rotating rotating ring 5 can drive the two moving seats 6 to move relatively along the axial direction, the moving stroke is 10-30 mm, and then the extrusion strip 8 is driven by the connecting rod 7 to extend out of or retract into the storage groove 10, and the extension length adjustment range is 5-20 mm; the rubber pad 9 on the side of the extrusion strip 8 away from the rotating clamping column 2 is made of flexible rubber with a Shore hardness of 50-60A, the thickness is 3-5 mm, the friction coefficient with the inner hole wall of the coil is greater than or equal to 0.4, and different specifications of coils with an inner hole diameter of 50-150 mm can be adapted; after extrusion fixing, the axial offset of the coil is less than or equal to 0.1 mm, and the radial runout is less than or equal to 0.05 mm, so that the coil is prevented from slipping or deforming at a high speed feeding (feeding speed of 10-30 m / min), and the position precision of subsequent punching is ensured.

[0039] In the application, the motor 17, the connecting shaft 12, the flattening roller 13, the gear one 14 and the gear two 15 form the "coil flattening and precise transmission" function: the output power of the motor 17 is 0.5-1.5 kW, the rotating speed adjustment range is 50-200 r / min, the bottom connecting shaft 12 is driven to rotate through the belt pulley 16, and then the meshing transmission (transmission ratio 1:1) of the gear one 14 and the gear two 15 is realized, so that the top and bottom connecting shafts 12 are synchronously and reversely rotated, the flattening roller 13 is driven to apply a flattening pressure of 0.5-2 N / cm² to the coil; the surface roughness Ra of the flattening roller 13 is less than or equal to 0.8 μm, and the roller surface runout is less than or equal to 0.03 mm, so that the coil surface wrinkles can be flattened to a height difference of less than or equal to 0.1 mm; at the same time, the coil transmission speed is adapted to the punching frequency (50-200 times / min) of the punch main body 27, the transmission speed fluctuation is less than or equal to ±0.5 m / min, the coil feeding position deviation is less than or equal to 0.05 mm, and the punching precision of the magnet motor core is improved.

[0040] In the application, the electric push rod 18, the adjusting wheel 22, the middle shaft 21 and the clamping strip 23 form the "coil tensioning adjustment and adjusting wheel convenient replacement" function: the telescopic range of the electric push rod 18 is 50-150 mm, and the telescopic speed is 5-15 mm / s, so that the adjusting wheel 22 can be driven to move up and down along the through groove 26, the contact pressure adjustment range of the adjusting wheel 22 and the coil is 0.3-1.5 N / cm², the precise control of the coil tension (5-20 N) is realized, the coil is prevented from being stretched and deformed due to excessive tension or from being blocked due to insufficient tension, the adjusting wheel 22 is quickly positioned (positioning deviation is less than or equal to 0.02 mm) through the clamping strip 23 and the clamping groove 24 of the middle shaft 21, is locked by the fastening nut 25 (screw specification M8-M12), and the dismounting time is less than or equal to 30 s; different diameters (50-100 mm) of the adjusting wheel 22 can be replaced according to the thickness (0.1-1 mm) of the coil, a variety of processing requirements can be adapted, and the universality of the device is improved.

[0041] Working principle:

[0042] In use, the support rod 3 is used to place the coiled material, and the base 1 and the rotating clamping column 2 are matched and arranged, so that the device can be replaced alternately when feeding, the feeding time is reduced, and the rotating ring 5 is rotated to drive the threaded rod 4 to rotate, and the two moving seats 6 are horizontally moved along the axial direction, and the moving seat 6 is moved, and the extrusion strip 8 at the corresponding position is moved outward by the driving of the connecting rod 7, so that the hollow part in the middle of the coiled material is extruded, and the coiled material is fixed on the support rod 3, and the rubber pad 9 is used to avoid deformation of the coiled material and increase the friction force, so as to avoid the coiled material from moving outward or even falling off during feeding. After the coiled material is placed, the motor 17, the two belt pulleys 16, the gear one 14, the gear two 15 and the plurality of connecting shafts 12 are driven to rotate the flattening roller 13, so as to flatten the coiled material and transmit the coiled material to the punch body 27. In this process, the connecting block 19 is lowered by the electric push rod 18, so that the central shaft 21 and the adjusting wheel 22 connected thereto are synchronously lowered, and the tension of the coiled material is adjusted. When the adjusting wheel 22 is replaced, the fastening nut 25 is only rotated to remove the limiting of the adjusting wheel 22, and then the adjusting wheel 22 is moved outward. When installing, the plurality of clamping strips 23 are only inserted into the clamping grooves 24, and the fastening nut 25 is rotated to complete the installation. After the coiled material is conveyed to the punch body 27, the punch body 27 is used for stamping operation, and the whole working process is completed.

[0043] The above front, rear, left, right, up, down are based on the Figure 1 of the drawings.

[0044] In the description of the present application, it should be understood that the terms "center", "longitudinal", "transverse", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the scope of protection of the present application.

[0045] The embodiments of the present application are described in detail above with reference to the drawings, but the present application is not limited to the described embodiments.

[0046] For those skilled in the art, various changes, modifications, replacements and variations can be made to the embodiments without departing from the principles and spirits of the present application, and still fall within the scope of protection of the present application.

Claims

1. A high-speed precision punch press for machining magneto cores, comprising a base (1), characterized in that: A rotating pin (2) is connected to the top center of the base (1). Support rods (3) are connected to the front and rear sides of the top of the rotating pin (2). One end of a threaded rod (4) is rotatably connected to the center of the support rod (3). A rotating ring (5) is connected to the end of the threaded rod (4) away from the rotating pin (2). The rotating ring (5) is located on the outside of the support rod (3). Two movable seats (6) are connected to the outside of the threaded rod (4). One end of a plurality of connecting rods (7) is connected to the outside of the movable seat (6) by a hinge. The other end of the connecting rod (7) is connected to an extrusion strip (8) by a hinge. A rubber pad (9) is connected to the side of the extrusion strip (8) away from the rotating pin (2). A plurality of storage slots (10) adapted to the extrusion strip (8) are opened on the outside of the support rod (3). A smoothing frame (11) is provided on the left side of the base (1). A punch press body (27) is provided on the left side of the smoothing frame (11). The top left and right sides of the smoothing frame (11) are connected to a connecting shaft (12), the front outer side of the connecting shaft (12) is connected to a smoothing roller (13), the rear middle side of the two bottom connecting shafts (12) is connected to a gear two (15), the rear outer side of the two top connecting shafts (12) is connected to a gear one (14), and the gear one (14) and gear two (15) on the same side are meshed. The two bottom connecting shafts (12) are connected to the outer rear end of the pulleys (16), and the two pulleys (16) are connected by a belt. The rear end of the bottom connecting shaft (12) on the right side is connected to the drive end of the motor (17), and the motor (17) is connected to the rear side of the smoothing frame (11) by a bracket. An electric push rod (18) is connected to the middle of the rear side of the smoothing frame (11) via a bracket. The drive end of the electric push rod (18) is connected to a connecting block (19). A bearing (20) is connected to the center of the front side of the connecting block (19). A central shaft (21) is connected to the front side of the bearing (20). The threaded rod (4) has a pitch of 2-5mm. The rotating ring (5) drives the two moving seats (6) to move relative to each other along the axial direction. The moving stroke is 10-30mm. Then, the connecting rod (7) drives the extrusion strip (8) to extend or retract from the receiving groove (10). The extension length adjustment range is 5-20mm. The rubber pad (9) on the side of the extrusion strip (8) away from the rotating pin (2) is made of flexible rubber with a Shore hardness of 50-60A and a thickness of 3-5mm. The friction coefficient with the inner wall of the roll is ≥0.4, which is suitable for rolls with inner diameters of 50-150mm. The output power of the motor (17) is 0.5-1.5kW, and the speed adjustment range is 50-200r / min. It drives the bottom connecting shaft (12) to rotate through the belt pulley (16). Then, through the meshing transmission of gear one (14) and gear two (15), the top and bottom connecting shafts (12) rotate synchronously in opposite directions, driving the smoothing roller (13) to apply a smoothing pressure of 0.5-2N / cm² to the roll material. The surface roughness Ra of the smoothing roller (13) is ≤0.8μm, and the roller runout is ≤0.03mm, smoothing the wrinkles on the surface of the roll material to a height difference of ≤0.1mm. The electric push rod (18) has a telescopic range of 50-150mm and a telescopic speed of 5-15mm / s. It drives the adjusting wheel (22) to move up and down along the through groove (26). The contact pressure adjustment range between the adjusting wheel (22) and the roll material is 0.3-1.5N / cm². The adjusting wheel (22) is quickly positioned by the locking strip (23) and the slot (24) of the central shaft (21), and locked with the fastening nut (25). Adjusting wheels (22) of different diameters can be replaced according to the thickness of the roll material.

2. The high-speed precision punch press for machining magneto cores according to claim 1, characterized in that: An adjusting wheel (22) is provided on the outer side of the central shaft (21). Multiple locking strips (23) are connected around the inner side of the adjusting wheel (22). Multiple slots (24) that are adapted to the locking strips (23) are opened around the outer side of the central shaft (21).

3. The high-speed precision punch press for machining magneto cores according to claim 2, characterized in that: The front end of the central shaft (21) is threaded with a fastening nut (25), which is located on the front side of the adjusting wheel (22).

4. The high-speed precision punch press for machining magneto cores according to claim 3, characterized in that: The top center of the smoothing frame (11) is provided with a through groove (26) that is compatible with the central shaft (21).

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