Cutting device for transformer insulation material

Abstract

The utility model discloses a cutting device of transformer insulating material, including bottom plate, driving roller, passive roller, top pressure subassembly and cutting subassembly, driving roller and passive roller are installed in the bottom plate top surface in parallel, and the interval between driving roller and passive roller is less than the diameter of the piece to be cut, and driving roller is connected with first rotary motor, the piece to be cut is put to driving roller and passive roller, and the pressure applying piece is against the top surface of the piece to be cut, fixes the piece to be cut, and first rotary motor drives driving roller rotation, and driving roller drives the piece to be cut to rotate, and the piece drives passive roller to roll, and through the power roller drive paper tube uniform speed rotation, make cutting force dynamic dispersion along the circumferential direction, avoid single point high pressure, avoid single point high pressure and lead to cutting knife wear or material burst.

Description

Technical Field

[0001] This utility model relates to the field of cutting equipment technology, specifically to a cutting device for transformer insulation materials. Background Technology

[0002] In transformer insulation material processing, fully coated paper and coated paper rolls (hereinafter referred to as insulating paper rolls) are widely used for interlayer insulation of coils due to their high insulation strength. Because insulating paper rolls consist of multiple layers of impregnated paper bonded together with phenolic resin, their interlayer shear strength is only 0.5-1.2 MPa, far lower than the tensile strength of the paper itself (80 MPa). When cutting rolls with a diameter of 600-1000 mm, the cutting tool must overcome radial resistance >1500 N. Currently, the common cutting method for insulating paper rolls is static cutting, which involves fixing the roll with a hydraulic clamp and then cutting vertically with a single disc cutter. The cutting tool experiences continuous high pressure concentrated on a single point of contact, causing brittle fracture of the resin adhesive layer and resulting in chipping on the cut surface. Furthermore, stress concentration leads to micro-chipping of the carbide cutting edge, necessitating periodic tool replacement. Utility Model Content

[0003] To address the aforementioned technical problems, this utility model proposes a cutting device for transformer insulation materials. An active roller drives the workpiece to be cut to rotate, while the workpiece drives the passive roller to roll. The paper tube is driven to rotate at a uniform speed by a power roller, so that the cutting force is dynamically distributed along the circumferential direction, avoiding continuous high pressure at a single point and preventing wear of the cutting blade or breakage of the material caused by high pressure at a single point.

[0004] The technical solution adopted by this utility model is as follows: A cutting device for transformer insulation material includes a base plate, an active roller, a passive roller, a top pressure assembly, and a cutting assembly. The active roller and the passive roller are installed parallel to each other on the top surface of the base plate, and the distance between the active roller and the passive roller is smaller than the diameter of the workpiece to be cut. The active roller is connected to a first rotary motor. The bottom end of the top pressure assembly is provided with a pressure applying element for abutting against the top of the workpiece to be cut, and the top of the top pressure assembly is fixed to the base plate. The cutting assembly includes a second rotary motor and a cutting blade connected to the rotating end of the second rotary motor. The second rotary motor is installed on the bottom surface of the base plate, and the top of the cutting blade passes through the base plate and protrudes from the top surface of the base plate.

[0005] Optionally, the top pressure assembly further includes a support plate vertically mounted on the base plate and a cylinder fixed to the support plate, wherein the output end of the cylinder is connected to the pressure application element.

[0006] Optionally, the pressure applying component includes a connecting rod, a connector, a first roller, and a second roller. The connecting rod is coaxially and fixedly connected to the cylinder output end. The connector is hinged to the connecting rod via a first rotating shaft. The first roller is rolledly connected to one end of the connector, and the second roller is rolledly connected to the other end of the connector. The axes of the first roller and the second roller are both parallel to the axis of the workpiece to be cut.

[0007] Optionally, the connector is provided with lugs at both ends, and the first roller and the second roller are respectively tactilely connected to the lugs via a second rotating shaft.

[0008] Optionally, it also includes a first mounting plate and a second mounting plate, wherein the active roller is rotatably mounted on the first mounting plate and the passive roller is rotatably mounted on the second mounting plate.

[0009] Optionally, the bottom surface of the second mounting plate is provided with a slider, the base plate is provided with a slide rail that slides with the slider, the base plate is fixedly mounted with a fixing plate with a threaded hole, the fixing plate is connected with an adjusting screw by a thread, one end of the adjusting screw is provided with a protrusion, and the second mounting plate is provided with a groove that mates with the protrusion.

[0010] Optionally, the base plate is provided with a through hole for the cutting blade to pass through.

[0011] Optionally, the plane of rotation of the cutting blade is perpendicular to the axis of the drive roller.

[0012] The beneficial effects of this invention are as follows: The workpiece to be cut is placed on the active roller and the passive roller, and the pressure application component abuts against the top surface of the workpiece to be cut, thus fixing the workpiece. The first rotary motor drives the active roller to rotate, which in turn drives the workpiece to rotate. The workpiece drives the passive roller to roll, and the power roller drives the paper tube to rotate at a uniform speed, so that the cutting force is dynamically distributed along the circumferential direction, avoiding continuous high pressure at a single point, and preventing wear of the cutting blade or material breakage caused by high pressure at a single point. Furthermore, the rotation of the driven roller and the rotation of the active roller form a speed gradient. This speed difference generates an axial friction component, driving the workpiece to rotate stably and feed, so that the cutting blade cuts a flat surface. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the structure of the transformer insulation material cutting device proposed in this embodiment of the utility model;

[0014] Figure 2 This is a schematic diagram showing the mating of the top-pressing component and the workpiece to be cut according to an embodiment of this utility model;

[0015] Figure 3 This is a schematic diagram of the engagement of the protrusion and groove of the adjusting screw according to an embodiment of the present invention.

[0016] The markings in the attached figures are as follows: 1. Base plate; 11. Slide rail; 12. Fixing plate; 13. Adjusting screw; 131. Protrusion; 14. Cutting blade; 2. Driving roller; 3. Passive roller; 4. Support plate; 5. Cylinder; 6. Pressure applying component; 61. Connecting rod; 62. Joint; 621. Hanging lug; 63. First roller; 64. Second roller; 65. First rotating shaft; 7. First mounting plate; 8. Second mounting plate; 81. Groove; 9. Workpiece to be cut. Detailed Implementation

[0017] The present application will now be described in further detail with reference to the accompanying drawings and embodiments.

[0018] like Figures 1 to 3 As shown, this embodiment discloses a cutting device for transformer insulation material, including a base plate 1, an active roller 2, a passive roller 3, a pressure assembly, and a cutting assembly. The active roller 2 and the passive roller 3 are installed parallel to each other on the top surface of the base plate 1, and the distance between the active roller 2 and the passive roller 3 is smaller than the diameter of the workpiece 9 to be cut. The active roller 2 is connected to a first rotary motor. The bottom end of the pressure assembly is provided with a pressure application element for abutting against the top end of the workpiece 9 to be cut, and the top end of the pressure assembly is fixed to the base plate 1. The cutting assembly includes a second rotary motor and a cutting blade 14 connected to the rotating end of the second rotary motor. The second rotary motor is installed on the bottom surface of the base plate 1, and the top of the cutting blade 14 passes through the base plate 1 and protrudes from the top surface of the base plate 1. The workpiece 9 to be cut is placed on the driving roller 2 and the driven roller 3. The pressure applicator abuts against the top surface of the workpiece 9 to fix it in place. The first rotary motor drives the driving roller 2 to rotate, which in turn drives the workpiece 9 to rotate. The workpiece drives the driven roller 3 to roll, and the power roller drives the paper tube to rotate at a constant speed, so that the cutting force is dynamically distributed along the circumference, avoiding continuous high pressure at a single point, and preventing wear of the cutting blade 14 or material breakage caused by high pressure at a single point. Furthermore, the rotation of the driven roller and the rotation of the driving roller 2 form a speed gradient. This speed difference generates an axial friction component, which drives the workpiece to rotate and feed stably, so that the cutting blade 14 cuts a flat surface.

[0019] like Figure 1 As shown, the top-pressing assembly in this embodiment also includes a support plate 4 vertically mounted on the base plate 1 and a cylinder 5 fixed to the support plate 4. The output end of the cylinder 5 is connected to the pressure application component. The workpiece 9 to be cut is placed on the driving roller 2 and the driven roller 3. The cylinder 5 drives the pressure application component to descend and press against the workpiece 9 to provide radial constraint. After cutting, the cylinder 5 drives the pressure adjustment component to rise, preparing for the next movement.

[0020] like Figure 1 and 2As shown, the pressure applying component in this embodiment includes a connecting rod 61, a connector 62, a first roller 63, and a second roller 64. The connecting rod 61 is coaxially and fixedly connected to the output end of the cylinder 5. The connector 62 is hinged to the connecting rod 61 via a first rotating shaft 65. The first roller 63 is rolledly connected to one end of the connector 62, and the second roller 64 is rolledly connected to the other end of the connector 62. The axes of the first roller 63 and the second roller 64 are both parallel to the axis of the workpiece 9 to be cut. When the vibration of cutting the workpiece 9 is transmitted to the connector 62 through the first roller 63 and the second roller 64, the connector 62 generates a slight displacement, dissipating part of the impact energy through friction and mitigating high-frequency, low-amplitude vibrations, such as the instantaneous impact of the tool cutting in. The first roller 63 and the second roller 64 constrain the radial runout of the workpiece 9 to be cut, allowing the workpiece 9 to slide axially.

[0021] like Figure 1 As shown, the connector 62 in this embodiment is provided with lugs 621 at both ends, and the first roller 63 and the second roller 64 are respectively tumblingly connected to the lugs 621 through the second rotating shaft.

[0022] like Figure 1 As shown, this embodiment also includes a first mounting plate 7 and a second mounting plate 8. The active roller 2 is rotatably mounted on the first mounting plate 7, and the passive roller 3 is rotatably mounted on the second mounting plate 8. The bottom surface of the second mounting plate 8 is provided with a slider. The base plate 1 is provided with a slide rail 11 that slides with the slider. A fixing plate 12 with a threaded hole is fixedly mounted on the base plate 1. The fixing plate 12 is threadedly connected to an adjusting screw 13. One end of the adjusting screw 13 is provided with a protrusion 131, and the second mounting plate 8 is provided with a groove 81 that mates with the protrusion 131. By turning the adjusting screw 13, the adjusting screw 13 drives the second mounting plate 8 to move along the slide rail 11, thereby adjusting the distance between the active roller 2 and the passive roller 3 to accommodate workpieces 9 of different diameters.

[0023] like Figure 1 As shown, the base plate 1 in this embodiment has a through hole through which the cutting blade 14 passes. The rotation plane of the cutting blade 14 is perpendicular to the axis of the drive roller 2. The perpendicular cutting direction ensures the flatness of the cut surface and avoids material delamination caused by oblique cutting.

[0024] It is understood that the specific embodiments described above are merely for explaining the relevant utility model and not for limiting the utility model. It should also be noted that, for ease of description, only the parts related to the utility model are shown in the accompanying drawings. Multiple technical solutions in the same embodiment, as well as multiple technical solutions in different embodiments, can be arranged and combined to form new technical solutions that do not contradict or conflict with each other. All equivalent structural transformations made based on the content of this utility model specification and drawings, directly or indirectly applied to other related technical fields, are similarly included within the protection scope of this utility model.

Claims

1. A cutting device for transformer insulation material, characterized in that, Includes base plate, drive rollers, driven rollers, top pressure assembly, and cutting assembly. The active roller and the passive roller are installed in parallel on the top surface of the base plate, and the distance between the active roller and the passive roller is smaller than the diameter of the workpiece to be cut. The active roller is connected to a first rotary motor. The bottom end of the top pressure assembly is provided with a pressure application element for abutting against the top end of the workpiece to be cut, and the top end of the top pressure assembly is fixed to the base plate; The cutting assembly includes a second rotary motor and a cutting blade connected to the rotating end of the second rotary motor. The second rotary motor is mounted on the bottom surface of the base plate, and the top of the cutting blade passes through the base plate and protrudes from the top surface of the base plate.

2. The transformer insulation material cutting device according to claim 1, characterized in that, The top pressure assembly also includes a support plate vertically mounted on the base plate and a cylinder fixed to the support plate, with the pressure application component connected to the cylinder output end.

3. The transformer insulation material cutting device according to claim 2, characterized in that, The pressure applying component includes a connecting rod, a connector, a first roller, and a second roller. The connecting rod is coaxially and fixedly connected to the output end of the cylinder. The connector is hinged to the connecting rod via a first rotating shaft. The first roller is rollingly connected to one end of the connector, and the second roller is rollingly connected to the other end of the connector. The axes of the first roller and the second roller are both parallel to the axis of the workpiece to be cut.

4. The transformer insulation material cutting device according to claim 3, characterized in that, The connector is provided with a lug at both ends, and the first roller and the second roller are respectively tactilely connected to the lug via a second rotating shaft.

5. The transformer insulation material cutting device according to claim 1, characterized in that, It also includes a first mounting plate and a second mounting plate, wherein the active roller is rotatably mounted on the first mounting plate and the passive roller is rotatably mounted on the second mounting plate.

6. The transformer insulation material cutting device according to claim 5, characterized in that, The bottom surface of the second mounting plate is provided with a slider, the base plate is provided with a slide rail that slides with the slider, the base plate is fixedly mounted with a fixing plate with a threaded hole, the fixing plate is connected with an adjusting screw by a thread, one end of the adjusting screw is provided with a protrusion, and the second mounting plate is provided with a groove that mates with the protrusion.

7. The transformer insulation material cutting device according to claim 1, characterized in that, The base plate has a through hole for the cutting blade to pass through.

8. The transformer insulation material cutting device according to claim 1, characterized in that, The plane of rotation of the cutting blade is perpendicular to the axis of the drive roller.

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