A kind of silicon steel three-dimensional roll core curve cutting equipment

Abstract

The utility model discloses a kind of silicon steel three-dimensional roll core curve cutting equipment, it is related to electrical equipment manufacturing technical field.The equipment includes head base, tool rest, upper spindle and lower spindle arranged in parallel up and down.The upper and lower spindle are fixedly assembled with spur gear meshing with each other, and the lower spindle is provided with a sprocket, forming a forced synchronous transmission mechanism.The end of the spindle is provided with a unique cutter head assembly: the upper cutter head is clamped and fixed by upper fixed disc and upper pressure disc;the lower cutter head and lower cutter pad are tightly fixed by lower fixed disc, lower inner pressure disc and lower outer pressure disc, forming a high-rigidity multilayer compression structure.The upper spindle and the lower spindle are supported by a pair of pre-tightened angular contact ball bearings.The utility model greatly suppresses the micro-vibration and axial, radial runout of cutter head under high speed by the combination of mechanical transmission and precision structure, ensures the high synchronism and extremely small constant gap of shearing process, and finally achieves the technical effects of silicon steel strip width size precision, edge burr-free, long-wearing life of equipment.

Description

Technical Field

[0001] This utility model belongs to the field of electrical equipment manufacturing technology, and more specifically relates to a silicon steel three-dimensional coiled iron core curve cutting equipment. Background Technology

[0002] The three-dimensional wound core is an important component of power transformers. It consists of three single-frame cores, arranged in pairs to form a triangular three-dimensional structure. Currently, single-frame cores are often wound using materials with good magnetic permeability, such as amorphous alloys or cold-rolled grain-oriented silicon steel sheets. The silicon steel strip used for winding the silicon steel single-frame core is obtained by cutting with a curved cutting machine.

[0003] Because the core of the iron core is cylindrical, the width of the silicon steel strip used to wind the core is not fixed. It is a trapezoidal strip that gradually widens or narrows. The core is formed by connecting these trapezoidal strips end to end, following a gradual transition from narrow to wide and then back to narrow. A curve cutting machine can cut large strips of material into individual trapezoidal strips.

[0004] In existing technologies, mechanical curve cutting machines generally employ disc cutter shearing. For example, the laser curve cutting machine for silicon steel sheets disclosed in existing technology CN216576117U uses laser cutting technology, which avoids some problems associated with mechanical cutters, but the equipment is expensive, consumes a lot of energy, and its cutting efficiency is limited in certain scenarios. Traditional mechanical cutting machines have inherent defects in their spindle system and cutter head fixing structure: the spindle is usually made of ordinary steel, which is prone to wear; the cutter head often uses simple flange clamping, which lacks rigidity; and the drive system often uses ordinary motors and long shaft drives, resulting in poor synchronization. These structural defects lead to increased radial and axial runout of the spindle after long-term high-speed operation, increased and unstable gap between the upper and lower cutter heads, ultimately resulting in out-of-tolerance dimensional accuracy of the sheared silicon steel strip, burrs and flaking at the cut edges, seriously affecting the subsequent core winding quality and transformer efficiency. Utility Model Content

[0005] To solve the above problems and overcome the shortcomings of the existing technology, this utility model provides a silicon steel three-dimensional coiled core curve cutting device; The first technical problem to be solved was that after the spindle ran at high speed for a long time, the radial and axial runout intensified, the gap between the upper and lower cutter heads increased, which led to a decrease in the dimensional accuracy of the sheared silicon steel strip, and the production of burrs and flanges on the cut edges, which seriously affected the subsequent winding quality of the iron core and the energy efficiency of the transformer.

[0006] The specific technical solution of this utility model to solve the above-mentioned technical problems is as follows: The silicon steel three-dimensional coiled iron core curve cutting equipment includes a machine head base and a tool holder fixedly installed on the machine head base. It also includes an upper spindle and a lower spindle arranged in parallel, with an upper spur gear and a lower spur gear fixedly mounted on the upper spindle and the lower spindle respectively, and the upper spur gear and the lower spur gear meshing with each other; An upper tool head assembly is installed at the end of the upper spindle; a lower tool head assembly is installed at the end of the lower spindle. The upper cutter head assembly includes an upper fixed plate fixedly connected to the shoulder of the upper spindle end, an upper cutter head and an upper pressure plate sleeved around the upper spindle and located outside the upper fixed plate, the upper cutter head being clamped between the upper fixed plate and the upper pressure plate, and the upper fixed plate and the upper pressure plate being fastened together. The lower cutter head assembly includes a lower fixed plate fixedly connected to the shoulder of the lower spindle end, a lower cutter head and a lower cutter pad sleeved around the lower spindle and located outside the lower fixed plate, a lower inner pressure plate sleeved around the shoulder of the lower spindle end, and a lower outer pressure plate installed at the end of the lower spindle. The lower outer pressure plate, the lower fixed plate, and the lower inner pressure plate are fastened together, pressing the lower cutter head and the lower cutter pad together.

[0007] Furthermore, a sprocket is also fixedly mounted on the lower main shaft.

[0008] Furthermore, the upper spur gear is fixed to the upper spindle, and the lower spur gear is fixed to the lower spindle by interference fit or key connection.

[0009] Furthermore, both the upper and lower spindles are made of high-chromium steel and have a hard chromium layer electroplated on their surfaces.

[0010] Furthermore, both the upper and lower cutter heads are made of tungsten steel.

[0011] Furthermore, both ends of the upper spindle and the lower spindle are supported on the tool holder by angular contact ball bearings.

[0012] The beneficial effects of this utility model are: One advantage of this invention is that the upper and lower cutter head assemblies employ a multi-layer clamping structure, providing extremely high axial clamping rigidity and end-face positioning accuracy. The upper and lower spindles are supported at both ends by angular contact ball bearings, and are pre-tightened with bearing pads and round nuts, eliminating axial and radial backlash in the spindle system. This significantly suppresses the micro-vibration and axial and radial runout of the cutter head at high speeds, reducing impact and fatigue damage to components caused by vibration and runout.

[0013] One advantage of this invention is that the upper and lower spur gears mesh with each other to form a rigid transmission pair, ensuring the absolute synchronicity of the rotation of the upper and lower cutter discs and avoiding the pulling and tearing of the material caused by asynchronous speeds. The upper and lower cutter disc assemblies together ensure the stability of the cutter disc assembly, so that the shearing gap between the upper and lower cutter discs can remain stable for a long time. The stable shearing gap, combined with the synchronized shearing action, realizes pure shearing of silicon steel sheets, and can continuously shear silicon steel strips with smooth edges, no burrs, and no flanging. Attached Figure Description

[0014] Appendix Figure 1 This is a schematic diagram of the three-dimensional structure of this utility model; Appendix Figure 2 This is a schematic diagram of the three-dimensional structure 2 of this utility model; Appendix Figure 3 This is a front view structural diagram of the present invention; Appendix Figure 4 This is a front view cross-sectional structural diagram of the present invention; in the attached drawing: 1. Machine head base; 2. Tool holder; 3. Upper spur gear; 4. Lower spur gear; 5. Upper spindle; 6. Lower spindle; 7. Sprocket; 8. Upper cutter head; 9. Lower cutter head; 10. Upper fixed plate; 11. Upper pressure plate; 12. Lower fixed plate; 13. Lower outer pressure plate; 14. Lower tool pad; 15. Lower inner pressure plate. Detailed Implementation

[0015] In the description of this utility model, it should be understood that the terms "center," "upper," "lower," "left," "right," "rear," "lower left," "upper right," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limiting the scope of protection of this utility model. In addition, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0016] The specific embodiment of this utility model is as follows: A silicon steel three-dimensional coiled iron core curve cutting device includes a machine head base 1 and a tool holder 2 installed on the machine head base 1. The tool holder 2 is fixedly installed on the machine head base 1 and is used to support the entire drive and shearing system.

[0017] As a preferred embodiment of this utility model It also includes an upper spindle 5 and a lower spindle 6, driven by servo motors and arranged in parallel. An upper spur gear 3 and a lower spur gear 4 are respectively fixedly mounted on the upper spindle 5 and lower spindle 6, and the upper spur gear 3 and lower spur gear 4 mesh with each other. The upper spur gear 3 is fixed to the upper spindle 5, and the lower spur gear 4 is fixed to the lower spindle 6 via an interference fit or a key connection, ensuring lossless power transmission. A sprocket 7 is also fixedly mounted on the lower spindle 6 for connecting an external servo motor to input power. The sprocket 7 is fixed to the lower spindle 6 via an interference fit or a key connection. When the servo motor drives the sprocket 7 via a chain, the power is transmitted sequentially through the lower spindle 6, the lower spur gear 4, and the upper spur gear 3 to the upper spindle 5, thereby achieving forced synchronous reverse rotation of the upper spindle 5 and the lower spindle 6.

[0018] The upper spindle 5 is equipped with an upper tool head 8 assembly, and the lower spindle 6 is equipped with a lower tool head 9 assembly. Specifically, the upper fixed plate 10 is fixedly connected to the end shoulder of the upper spindle 5 by multiple hex socket head cap screws. The shoulder provides an axial positioning reference for the entire cutter head assembly and bears the main shearing axial force.

[0019] The upper cutter head 8 and the upper pressure plate 11 are sequentially fitted onto the upper spindle 5, so that the upper cutter head 8 is tightly attached to the outside of the upper fixed plate 10. Multiple hex socket head cap screws are passed through the upper fixed plate 10 and screwed into the upper pressure plate 11 to firmly clamp and press the upper cutter head 8 between the upper fixed plate 10 and the upper pressure plate 11.

[0020] With this structure, when the upper spindle 5 rotates, the torque is transmitted to the upper cutter head 8 through the friction between the upper fixed plate 10 and the upper cutter head 8, driving it to rotate at high speed. The multi-layer pressure plate structure disperses the huge, alternating shear impact force on the cutter head to multiple fasteners and contact surfaces, avoiding stress concentration, thereby greatly suppressing the micro-vibration and runout of the cutter head under high-frequency shearing.

[0021] The lower tool disc 9 assembly is mounted on the end of the lower spindle 6. The lower fixed plate 12 is fixedly connected to the shoulder of the lower spindle 6 by multiple hex socket head cap screws. The lower tool disc 9 and the lower tool pad 14 are sequentially fitted onto the lower spindle 6 and located outside the lower fixed plate 12. The lower inner pressure plate 15 is fitted around the shoulder of the lower spindle 6, and the lower outer pressure plate 13 is mounted on the end of the lower spindle 6. Finally, hex socket head cap screws are sequentially passed through the lower outer pressure plate 13 and the lower fixed plate 12 and screwed into the threaded holes of the lower inner pressure plate 15. By tightening these hex socket head cap screws, the lower tool disc 9 and the lower tool pad 14 are pressed and fixed together.

[0022] This mechanism uses the preload generated by the hex socket screws to tightly clamp the lower cutter head 9 and the lower cutter pad 14 as a whole between the lower fixed plate 12, the lower inner pressure plate 15, and the lower outer pressure plate 13. This bidirectional clamping structure provides rigidity and stability exceeding that of the upper cutter head 8 assembly, better resisting the upward impact force generated during shearing.

[0023] To ensure motion accuracy and lifespan, the upper spindle 5 and lower spindle 6 are preferably made of high-chromium steel and have a hard chromium layer electroplated on their surfaces. The upper cutter head 8 and lower cutter head 9 are preferably made of high-hardness tungsten steel.

[0024] Both ends of the upper spindle 5 and the lower spindle 6 are supported in the bearing housing of the tool holder 2 by a pair of angular contact ball bearings, and are preloaded with round nuts to eliminate axial clearance and improve spindle rigidity. Preferably, bearing pads are provided on both the inner and outer ring sides of the angular contact ball bearings to precisely control the axial position and preload of the bearings. An oil seal is also provided in the bearing housing of the tool holder 2. The oil seal is press-fitted into a groove at the end of the bearing housing, and its lip makes interference contact with the spindle journal to form a dynamic seal.

[0025] It should be noted that this utility model is a silicon steel three-dimensional coiled core curve cutting device. In specific operation, An external servo motor starts, outputting precisely controlled rotational motion. The servo motor transmits power to a sprocket 7 fixedly mounted on the lower spindle 6 via a chain, causing the lower spindle 6 to rotate. The lower spur gear 4, fixed on the lower spindle 6, rotates accordingly. The lower spur gear 4 meshes with the upper spur gear 3 fixed on the upper spindle 5. According to the gear transmission principle, the two meshing gears rotate in opposite directions. Therefore, the rotation of the lower spindle 6 is transmitted to the upper spindle 5, ensuring that the upper spindle 5 and lower spindle 6 rotate synchronously and in opposite directions. This structure solves the potential asynchrony problem of traditional independent drives or long-shaft drives, providing absolutely synchronized reverse rotational power to the upper and lower cutter heads 9. This is the foundation for achieving clean and crisp shearing, avoiding material pulling and burrs caused by speed asynchrony.

[0026] The synchronously rotating upper spindle 5 and lower spindle 6 drive the upper cutter head 8 and lower cutter head 9 assemblies mounted at their ends to rotate at high speed. The cutting edges of the upper and lower cutter heads 8 and 9 periodically meet and separate during rotation. A silicon steel strip of fixed width is fed into the gap between the high-speed rotating upper and lower cutter heads 8 and 9. When the cutting edges of the upper and lower cutter heads 8 and 9 meet, they exert a huge, opposite-direction shearing force on the silicon steel sheet. This force exceeds the shear strength limit of the silicon steel material, causing the silicon steel sheet to be instantly sheared, ultimately forming a trapezoidal strip used for winding a three-dimensional iron core.

[0027] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claims. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A silicon steel three-dimensional coiled core curve cutting device, comprising a head base (1) and a tool holder (2) fixedly installed on the head base (1), characterized in that: It also includes an upper spindle (5) and a lower spindle (6) arranged in parallel. An upper spur gear (3) and a lower spur gear (4) are fixedly mounted on the upper spindle (5) and the lower spindle (6) respectively, and the upper spur gear (3) and the lower spur gear (4) mesh with each other. An upper tool disc assembly is installed at the end of the upper spindle (5), and a lower tool disc assembly is installed at the end of the lower spindle (6). The upper cutter head assembly includes an upper fixed plate (10) fixedly connected to the shoulder of the upper spindle (5), an upper cutter head (8) sleeved around the upper spindle (5) and located outside the upper fixed plate (10), and an upper pressure plate (11). The upper cutter head (8) is clamped between the upper fixed plate (10) and the upper pressure plate (11), and the upper fixed plate (10) and the upper pressure plate (11) are fastened together. The lower cutter head assembly includes a lower fixed plate (12) fixedly connected to the shoulder of the lower spindle (6), a lower cutter head (9) and a lower cutter pad (14) sleeved on the periphery of the lower spindle (6) and located outside the lower fixed plate (12), a lower inner pressure plate (15) sleeved on the periphery of the shoulder of the lower spindle (6), and a lower outer pressure plate (13) installed on the end of the lower spindle (6). The lower outer pressure plate (13), the lower fixed plate (12) and the lower inner pressure plate (15) are fastened together, and the lower cutter head (9) and the lower cutter pad (14) are pressed together.

2. The silicon steel three-dimensional coiled core curve cutting equipment according to claim 1, characterized in that: A sprocket (7) is also fixedly mounted on the lower main shaft (6).

3. The silicon steel three-dimensional coiled core curve cutting equipment according to claim 1, characterized in that: The upper spur gear (3) and the upper spindle (5), and the lower spur gear (4) and the lower spindle (6) are all fixed by interference fit or key connection.

4. The silicon steel three-dimensional coiled core curve cutting equipment according to claim 1, characterized in that: Both the upper spindle (5) and the lower spindle (6) are made of high chromium steel and their surfaces are electroplated with a hard chromium layer.

5. The silicon steel three-dimensional coiled core curve cutting equipment according to claim 1, characterized in that: Both the upper cutter head (8) and the lower cutter head (9) are made of tungsten steel.

6. The silicon steel three-dimensional coiled core curve cutting equipment according to claim 1, characterized in that: The upper spindle (5) and the lower spindle (6) are supported on the tool holder (2) by angular contact ball bearings at both ends.

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