A washer cutting device

Abstract

This invention relates to a washer cutting device, specifically within the field of cutting equipment technology. The invention includes a central worktable mounted on a central base. A first worktable and a second worktable are radially arranged around the central worktable. Each of the first and second worktables is composed of at least two arc-shaped plates arranged circumferentially, with each arc-shaped plate connected to its base. A bidirectional lead screw with a drive mechanism is mounted on the central base and connected to it via bearings. The positive and negative helical portions of the bidirectional lead screw are located on opposite sides of the central base. This invention allows for the replacement of the corresponding first and second worktables according to the required washer size, thus supporting washers of different sizes. During cutting, each tool can be automatically positioned via position sensors, reducing cutting errors and improving product quality.

Description

Technical Field

[0001] This invention relates to a washer cutting device and pertains to the field of cutting equipment technology. Background Technology

[0002] Power transformers are core equipment in the power transmission and transformation links of power systems, and their sealing performance directly determines the operational stability and service life of the transformer. Large power transformers often use large rubber sealing rings with diameters ranging from 800mm to 1500mm for tank flange seals and the connection between the bell housing and the transformer body. During transformer overhauls, these sealing rings need to be replaced. Due to the uncertainty of the gasket dimensions, maintenance personnel cannot prepare gasket spares in advance, especially when some gaskets are non-standard products. Standard parts cannot cover all needs, leading to delays in replacement. In situations like late at night, at remote sites, or in severe weather, it is impossible to procure spare parts in time, necessitating on-site fabrication. However, the manufacturing process for sealing rings is labor-intensive and requires low precision. Using processing equipment such as waterjet cutting machines or laser cutting machines is not suitable for the external environment and is inconvenient to transport. Therefore, manual cutting is commonly used, relying on manually drawing outlines and then manually cutting with a tool. However, this method relies on manual marking and positioning, which is prone to positioning errors, causing the actual dimensional deviation after cutting to easily exceed the allowable range, resulting in a low yield rate. Summary of the Invention

[0003] The purpose of this invention is to design a washer cutting device that is easy to transport and accurately positioned.

[0004] The present invention includes a central worktable disposed on a central base, a first worktable and a second worktable disposed radially around the central worktable, the first worktable and the second worktable being composed of at least two arc-shaped plates disposed circumferentially, and the lower part of each arc-shaped plate being connected to the base; a bidirectional lead screw with a drive mechanism is disposed on the central base and connected to the central base by bearings, the positive helix portion and the negative helix portion of the bidirectional lead screw being located on both sides of the central base. At least one side of the positive helix portion and the negative helix portion of the double-sided lead screw is provided with a guide rail parallel to the double-sided lead screw. The base of each arc plate of the second worktable is connected to the positive helix portion and the negative helix portion of the double-sided lead screw by threads. The base of each arc plate of the first worktable is engaged with the guide rail. The base of the arc plate of the first worktable located on the same side of the central base is connected to the base of the arc plate of the second worktable by an electric cylinder. Cutting tools are mounted on the central worktable, the first worktable, and the second worktable via a truss. A turntable driven by a stepper motor is mounted on the truss. A lifting cylinder mounted on the turntable has its piston rod slidably connected to the center hole of the turntable. The lower end of the piston rod is connected to a tool holder with a transverse guide rail. The cutting tool and a pressure rod with rollers at the lower end are slidably connected on the tool holder. A position positioning mechanism is provided between the cutting tool and the pressure rod and the transverse guide rail.

[0005] Furthermore, the second workbench is located outside the first workbench, and a pressing cylinder is provided on the outside of the second workbench or the base of the second workbench. The piston rod of the pressing cylinder is connected to a pressing plate located above the second workbench.

[0006] Furthermore, the lower surface of the pressure plate is provided with inserting pins.

[0007] Furthermore, guide rails are provided on both sides of the positive spiral section and the negative spiral section respectively, and guide structures that slide with the two guide rails are provided on the base of the first worktable. A lead screw through hole with a diameter larger than that of the bidirectional lead screw is also provided on the base of the first worktable, and the bidirectional lead screw passes through the lead screw through hole.

[0008] Furthermore, a cutting tool is provided on the transverse guide rail, and a pressure rod is provided at least on its inner side, and a counterweight box is provided on the other side of the piston rod of the lifting cylinder; or cutting tools are provided on both sides of the piston rod of the lifting cylinder, and a pressure rod is provided at least on the inner side of each cutting tool.

[0009] Furthermore, the bidirectional lead screw includes a main shaft connected to the central worktable base via bearings and a forward lead screw and a reverse lead screw respectively connected to both ends of the main shaft via pin structures; each guide rail is fixed by bolts.

[0010] Furthermore, each of the arc-shaped plates of the first or second workbench is connected to its respective base by bolts.

[0011] Furthermore, the pressure rod includes a slider connected to the transverse guide rail, a telescopic rod connected below the slider, a roller seat with a shaft at the lower end of the telescopic rod, a roller mounted on the roller seat, and a compression spring fitted around the telescopic rod between the slider and the roller seat.

[0012] Furthermore, the tool holder passes through the lower end of the lifting cylinder piston rod and is fixedly connected to the piston rod by a bolt inserted through the lower end of the piston rod.

[0013] Furthermore, the first workbench and the second workbench are each composed of four identical arc-shaped plates distributed circumferentially. Two bidirectional lead screws of different heights are intersected on the central base. Guide rails are provided on both sides of each bidirectional lead screw. The bases of the first workbench and the second workbench, which are positioned opposite each other, are connected to the corresponding bidirectional lead screws and guide rails, respectively.

[0014] (1) The present invention can replace the corresponding first and second worktables according to the required washer size to support washer of different sizes; during cutting, each tool can be automatically positioned by each position sensor, which reduces cutting error and improves product quality.

[0015] (2) The second base is provided with a pressure plate for mounting the material pin, which can fix the outer peripheral material of the washer material by the material pin and avoid deviation during cutting; a roller is provided on the inner side of the cutter, which can press and fix the washer by the roller when cutting the outer diameter of the washer and move with the cutter, which can avoid deformation caused by the lack of fixation on the inner side of the washer during cutting and affect the size.

[0016] (3) Most of the components in this application are detachable to facilitate disassembly and transportation of the equipment; some of the larger components are provided with weight-reducing cavities to make the equipment easy to carry and transport. Attached Figure Description

[0017] Figure 1 This is a front view of Embodiment 1 of the present invention; Figure 2 for Figure 1 A magnified view of a section at point A in the middle; Figure 3 for Figure 1 A magnified view of a section at point B in the middle; Figure 4 for Figure 1 Top view of each workbench; Figure 5 for Figure 4 Front view full section; Figure 6 for Figure 5 A magnified view of a section at point C; Figure 7 for Figure 6 A schematic diagram of the structure of the second base section; Figure 8 for Figure 1 Top view of the middle truss section; Figure 9 for Figure 1 Left view of the cutting tool section; Figure 10 This is a front view of Embodiment 2 of the present invention; The components include: 1. Central base; 2. Central worktable; 3. First worktable; 4. First base; 5. Second worktable; 6. Second base; 7. Bidirectional lead screw; 8. Positioning motor; 9. Bearing seat; 10. Pin; 11. Lead screw through hole; 12. Guide rail; 13. Electric cylinder; 14. Pressing cylinder; 15. Pressing plate; 16. Material clamping needle; 17. Sinking trough; 18. Truss; 19. Turntable support; 20. Turntable; 21. Lifting cylinder. 2. Motor bracket; 23. Stepper motor; 24. Drive wheel; 25. Turntable bearing; 26. Tool holder; 27. Transverse guide rail; 28. Tool; 29. ​​Telescopic rod; 30. Roller seat; 31. Roller; 32. Compression spring; 33. Cutting sensor; 34. Extrusion position sensor; 35. First cutting trigger; 36. Second cutting trigger; 37. Extrusion trigger; 38. Weight reduction chamber; 39. Counterweight box; 40. Gear and rack mechanism. Detailed Implementation Example 1

[0018] by Figure 1 In this embodiment, the directions of up, down, left, right, front, and back are defined. The side closer to the center of the washer is defined as the inner side of this embodiment, and the side further away is defined as the outer side of this embodiment.

[0019] As shown in the figure, this embodiment includes a central base 1, which is cylindrical and placed on the ground. A recess 17 is formed on its upper surface to reduce the weight of the central base 1. A central worktable 2 is positioned above the central base 1 and is fixedly connected to the central base 1. A set of first bases 4 are provided on the outer side of the central base 1. In this embodiment, four first bases 4 are provided, each being a quadrangular prism and evenly distributed radially along the central base 1. A first worktable 3 is positioned above each first base 4. The first worktable 3 is an arc-shaped plate, and all first worktables 3 have the same shape. They are fixed to the first base 4 by bolts installed on their upper surfaces. During use, the corresponding first worktable 3 can be installed according to the size of the washer.

[0020] A set of second bases 6 are provided on the outer side of the first base 4. In this embodiment, four second bases 6 are provided, each of which is a quadrangular prism and is evenly distributed radially along the central base 1. A second worktable 5 is provided above each second base 6. The second worktable 5 is an arc-shaped plate, and each second worktable 5 has the same shape. It is fixed to the second base 6 by bolts installed on its upper surface. A pressing cylinder 14 is provided on the outer side of each second base 6. The cylinder body of the pressing cylinder 14 is fixedly installed on the second base 6 by bolts, clamps and other structures, located below the second worktable 5, so as not to obstruct the disassembly of the second worktable 5. The piston rod of the pressing cylinder 14 extends upward and is fixedly installed with a pressing plate 15. The pressing plate 15 extends inward to the top of the second worktable 5. A piercing needle 16 is fixedly installed on its lower surface. In use, the pressing cylinder 14 is activated to control the pressing plate 15 to move downward, so that the piercing needle 16 pierces into the remaining material to be cut on the outer periphery of the washer, which can play a role in auxiliary fixation and prevent the washer from shifting during cutting.

[0021] A bidirectional lead screw 7 is provided at the lower part of the central base 1. In this embodiment, two bidirectional lead screws 7 are provided, which are perpendicular to each other and have different heights, and intersect through the central base 1. The bidirectional lead screw 7 includes a main shaft passing through the central base 1 and a forward lead screw and a reverse lead screw located at both ends of the main shaft. The ends of the forward and reverse lead screws near the main shaft are provided with a fitting structure that matches the main shaft and are connected by a pin 10. The main shaft portion of the bidirectional lead screw 7 passes through the central base 1 and is rotatably connected to the central base 1 by a bearing. A positioning motor 8 is provided on one side of the two bidirectional lead screws 7, and a bearing seat 9 is rotatably connected to the other side. In use, the rotation of the bidirectional lead screw 7 can be controlled by the positioning motor 8.

[0022] Each bidirectional lead screw 7 has a guide rail 12 parallel to its helical portion (forward and reverse lead screws) on both sides. During use, the guide rail 12 is fixed to the ground with bolts and can be disassembled and stored after use. The lower surface of each first base 4 and second base 6 is provided with a guide mechanism that matches the guide rail 12. The guide mechanism has a groove structure, and its shape and size match the guide rail 12, allowing the first base 4 and second base 6 to slide along the guide rail 12. The lower part of the second base 6 is screwed to the forward and reverse lead screws of the bidirectional lead screw 7. During use, starting the positioning motor 8 controls the second base 6 on both sides of the central base 1 to move in opposite directions along the guide rail 12. Each second base 6 is fitted with an electric cylinder 13 on the side closest to the first base 4. The first base 4 and the second base 6, located on the same side as the central base 1, are connected by the electric cylinder 13. The lower part of the first base 4 has a lead screw through hole 11 with a diameter larger than that of the bidirectional lead screw 7. The bidirectional lead screw 7 passes through the lead screw through hole 11. In use, the first base 4 can slide along the guide rail with the second base 6. When the electric cylinder 13 is activated, the first base 4 can be pushed and pulled by its piston rod to adjust the distance between the first base 4 and the second base 6.

[0023] In this embodiment, a weight-reducing cavity 38 is provided on the inner side of the second base 6 to reduce the weight of the second base 6 so as to facilitate transportation and carrying.

[0024] Trusses 18 are provided around the outer periphery of the central workbench 2, the first workbench 3, and the second workbench 5. In this embodiment, four trusses 18 are provided in a cross shape. A turntable support 19 is provided in the middle of the trusses 18, above the central workbench 2. The turntable support 19 is connected to each truss 18 by bolts and can be disassembled. A stepped hole is provided on the upper surface of the turntable support 19. A turntable bearing 25 is provided on the stepped surface of the stepped hole. The lower ring of the turntable bearing 25 is fixedly connected to the turntable support 19. A turntable 20 is provided in the stepped hole. The shape of the turntable 20 matches the stepped hole. Its lower surface is fixedly connected to the upper ring of the turntable bearing 25 and can be rotatably connected to the turntable support 19 through the turntable bearing 25. A stepper motor 23 is mounted on the left side of the turntable 20 via a motor bracket 22. The rotating shaft of the stepper motor 23 extends downward and is fitted with a drive wheel 24 that meshes with the turntable 20. In use, starting the stepper motor 23 controls the rotation of the turntable 20. A lifting cylinder 21 is located at the center of the turntable 20. The cylinder body of the lifting cylinder 21 is fixedly connected to the turntable 20 and can rotate with the turntable 20. The piston rod of the lifting cylinder 21 passes downward through the central hole of the turntable 20 and is slidably connected to it. A tool holder 26 is mounted on the lower end of the piston rod of the lifting cylinder 21 via a screw bolt.

[0025] A transverse guide rail 27 is provided below the tool holder 26. In this embodiment, two transverse guide rails 27 are provided, symmetrically installed on the lower surface of the tool holder 26. A slide table is provided at the lower part of the transverse guide rail 27 and is slidably connected thereto. A tool 28 is fixedly installed on the lower surface of the slide table. In this embodiment, the tool 28 is an ultrasonic cutter to achieve rapid cutting of the gasket material, avoid the generation of burrs, and improve the cutting quality. The ultrasonic cutter is an existing device and will not be described in detail here.

[0026] In this embodiment, cutters 28 are respectively provided on both sides of the piston rod of the lifting cylinder 21, and a pressure rod is provided on the inner side of each cutter 28. The pressure rod includes a slider that is slidably connected to the transverse guide rail 27. A telescopic rod 29 is provided on the lower surface of the slider and is fixedly connected to it. A roller seat 30 is provided below the telescopic rod 29. The upper surface of the roller seat 30 is fixedly connected to the lower end of the telescopic rod 29, and a shaft is fixedly installed in its inner cavity. A roller 31 protruding from the lower surface of the roller seat 30 is rotatably mounted on the shaft of the roller seat 30. A compression spring 32 is sleeved around the telescopic rod 29. The upper and lower ends of the compression spring 32 are fixedly connected to the slider and the roller seat 30, respectively. In use, the lifting cylinder 21 controls the downward movement of the cutter 28 and the pressure rod. The cutter 28 cuts the washer material, while the pressure rod can adjust the distance between the slider and the washer material via the telescopic rod 29. The spring force of the compression spring 32 presses the inner material of the cut area for auxiliary fixation. When the stepper motor 23 is started, the turntable 20 controls the cutter 28 to rotate and cut, while the pressure rod continuously presses and fixes the washer material via the roller 31. In this embodiment, the washer material is rubber.

[0027] A gear and rack mechanism 40 is provided behind the transverse guide rail 27. The gear and rack mechanism 40 includes a rack of the same length as the transverse guide rail 27, which is fixedly installed on the lower surface of the tool holder, and gears fixedly installed on the shaft of a small motor on the rear side of each slider and slide table. The gears on the shaft of the small motor mesh with the rack. When in use, the small motor is started, and the corresponding slider or slide table can be moved along the transverse guide rail 27 through the meshing of the gears and rack.

[0028] A positioning mechanism is provided between the cutting tool 28 and the pressure rod and the transverse guide rail 27. The positioning mechanism includes a cutting sensor 33 and a pressing position sensor 34. The cutting sensor 33 is located on the outside of the slide of the cutting tool 28. A first cutting trigger 35, which is aligned with the cutting sensor 33, is located on the upper surface of the first worktable 3. When the cutting sensor 33 detects the first cutting trigger 35, the cutting tool 28 is aligned with the inner hole of the washer. A second cutting trigger 36 is embedded on the upper surface of the pressure plate 15. When the cutting sensor 33 detects the second cutting trigger 36, the cutting tool 28 is aligned with the outer diameter of the washer. The pressing position sensor 34 is located on the inside of the pressure rod slider. A pressing trigger 37, which is aligned with the pressing position sensor 34, is located on the inside of the first worktable 3. When the pressing position sensor 34 detects the pressing trigger 37, the roller 31 is located above the first worktable 3, which can press the washer when cutting the outer diameter of the washer, thus assisting in fixation.

[0029] In this embodiment, the outer diameter of the washer is aligned with the inner arc surface of the second workbench 5, and the inner hole of the washer is aligned with the inner arc surface of the first workbench 3. Replacing the corresponding first workbench 3 and second workbench 5 can avoid the phenomenon that the cutting tool 28 is hindered by the different curvatures of the first and second workbench.

[0030] In this embodiment, the positioning motor 8 is first started to move the first base 4 and the second base 6 outwards. The corresponding first worktable 3 and second worktable 5 are installed according to the required size of the washer. During installation, the distance between the first worktable 3 and the second worktable 5 is adjusted by the electric cylinder 13. After installation, the positioning motor 8 moves the first worktable 3 and the second worktable 5 to the processing position. After they are in place, the first worktables 3 are in contact with each other. Then, the small motors on the back of each cutter 28 are started to control the cutter 28 to move outwards (the initial positions of the cutter 28 and the pressure rod are close to the inner side of the transverse guide rail 27). During the movement, the cutting sensor 33 stops after detecting the first cutting trigger 35. After it is in place, the washer material to be cut is placed above the central worktable 2, the first worktable 3 and the second worktable 5. The pressing cylinder 14 is started to control the inserting needle 16 to move down and pierce into the washer material. After fixing, start the cutter 28, then start the lifting cylinder 21 to move the cutter holder 26 down, and the two cutters 28 pierce the inner hole of the washer. The pressure roller, being close to the inner side of the transverse guide rail 27, moves down and is positioned above the central worktable 2. Start the stepper motor 23 to control the turntable 20 to rotate 180°, so that the two cutters 28 complete the cutting of the inner hole of the washer. Control the cutter holder 26 to move up and remove the cut-off material from the inner hole of the washer. Then, start the small motors behind each cutter 28 and the pressure rod in sequence to control the cutter 28 and the pressure rod to move outward. During the movement, the cutting sensor 33 stops after detecting the second cutting trigger 36, and the extrusion position sensor 34 stops after detecting the extrusion trigger 37. After reaching the position, start the lifting cylinder 21 to move the cutter holder 26 down, and the two cutters 28 pierce the outer diameter of the washer. The roller 31 is positioned above the first worktable 3, and the washer is extruded by the rebound force of the compression spring 32. Then, start the stepper motor 23, and control the turntable 20 to rotate the two cutters 28 180° to complete the cutting of the outer diameter of the washer. After completion, reset the tool holder 26, turn off each cutter 28 and reset it with the pressure rod. After removing the washer, other sizes of washers can be cut according to the above steps.

[0031] After use, the components of this embodiment can be disassembled and reassembled for subsequent storage and transportation.

[0032] In this embodiment, a first cutting trigger 35 and a second cutting trigger 36 can be respectively set on the first and second worktables on the left and right sides. For example, the first cutting trigger 35 is set on the upper surface of the first worktable 3 on the left side, and the second cutting trigger 36 is set on the pressure plate 15 on the right side. During cutting, the left-side cutter 28 is positioned to the inner hole cutting surface of the washer, the right-side cutter is positioned to the outer diameter cutting surface of the cutter 28, the right-side pressure roller squeezes the washer, and the stepper motor 23 is started to control the turntable 20 to rotate 360°, which can simultaneously complete the cutting of the inner hole and the outer diameter of the washer. Example 2

[0033] This embodiment is basically the same in structure as Embodiment 1, except that in this embodiment, two cutters 28 are arranged on the left side of the cutter holder 26, and a pressure bar is arranged between the two cutters 28; a counterweight box 39 is fixedly installed on the lower surface of the cutter holder 26 on the right side of the cutter holder 26. The front of the counterweight box 39 is provided with an openable filling port, which can be filled with materials such as sand and stone to increase its weight and ensure the balance of both sides of the cutter holder 26. In use, the outer cutter 28 is controlled to move outward and stops after detecting the second cutting trigger 36. Then, the pressure bar is controlled to move outward and stops after detecting the extrusion trigger 37. Then, the inner cutter 28 is controlled to move outward and stops after detecting the first cutting trigger 35. After completion, the washer material is placed, and the washer material is fixed by the cleaving pin 16. The cutter holder 26 is then controlled to move down. After it is in place, the stepper motor 23 is controlled to rotate the turntable 20 360°, and the inner hole and outer diameter of the washer are cut at the same time.

Claims

1. A washer cutting device, characterized in that: It includes a central worktable set on a central base, and a first worktable and a second worktable are respectively set on the radial periphery of the central worktable. The first worktable and the second worktable are each composed of at least two arc-shaped plates arranged circumferentially, and the lower part of each arc-shaped plate is connected to its base. A bidirectional lead screw with a drive mechanism is set on the central base and connected to the central base by bearings. The positive helix part and the negative helix part of the bidirectional lead screw are located on both sides of the central base. At least one side of the positive helix portion and the negative helix portion of the double-sided lead screw is provided with a guide rail parallel to the double-sided lead screw. The base of each arc plate of the second worktable is connected to the positive helix portion and the negative helix portion of the double-sided lead screw by threads. The base of each arc plate of the first worktable is engaged with the guide rail. The base of the arc plate of the first worktable located on the same side of the central base is connected to the base of the arc plate of the second worktable by an electric cylinder. Cutting tools are mounted on the central worktable, the first worktable, and the second worktable via a truss. A turntable driven by a stepper motor is mounted on the truss. A lifting cylinder mounted on the turntable has its piston rod slidably connected to the center hole of the turntable. The lower end of the piston rod is connected to a tool holder with a transverse guide rail. The cutting tool and a pressure rod with rollers at the lower end are slidably connected on the tool holder. A position positioning mechanism is provided between the cutting tool and the pressure rod and the transverse guide rail.

2. The washer cutting device according to claim 1, characterized in that: The second workbench is located outside the first workbench. A pressing cylinder is installed on the outside of the second workbench or the base of the second workbench. The piston rod of the pressing cylinder is connected to a pressing plate located above the second workbench.

3. The washer cutting device according to claim 2, characterized in that: The lower surface of the pressure plate is provided with insert pins.

4. The washer cutting device according to claim 1, 2, or 3, characterized in that: Guide rails are provided on both sides of the positive spiral section and the negative spiral section respectively. The base of the first worktable is provided with guide structures that slide with the two guide rails respectively. The base of the first worktable is also provided with a lead screw through hole with a diameter larger than that of the bidirectional lead screw, and the bidirectional lead screw passes through the lead screw through hole.

5. The washer cutting device according to claim 1, 2, or 3, characterized in that: A cutting tool is provided on the transverse guide rail, and a pressure rod is provided at least on its inner side. A counterweight box is provided on the other side of the piston rod of the lifting cylinder; or cutting tools are provided on both sides of the piston rod of the lifting cylinder, and a pressure rod is provided at least on the inner side of each cutting tool.

6. The washer cutting device according to claim 1, 2, or 3, characterized in that: The bidirectional lead screw includes a main shaft connected to the central worktable base via bearings and a forward lead screw and a reverse lead screw respectively connected to both ends of the main shaft via pin structures; each guide rail is fixed by bolts.

7. The washer cutting device according to claim 1, 2, or 3, characterized in that: Each of the arc-shaped plates of the first or second workbench is connected to its respective base by bolts.

8. The washer cutting device according to claim 1, 2, or 3, characterized in that: The pressure rod includes a slider connected to a transverse guide rail. A telescopic rod is connected below the slider. A roller seat with a shaft is provided at the lower end of the telescopic rod. A roller is mounted on the roller seat. A compression spring is fitted around the telescopic rod between the slider and the roller seat.

9. The washer cutting device according to claim 1, 2, or 3, characterized in that: The tool holder passes through the lower end of the piston rod of the lifting cylinder and is fixedly connected to the piston rod by a bolt inserted through the lower end of the piston rod.

10. The washer cutting device according to claim 1, 2, or 3, characterized in that: The first worktable and the second worktable are each composed of four identical arc-shaped plates distributed circumferentially. Two bidirectional lead screws of different heights are intersected on the central base. Guide rails are provided on both sides of each bidirectional lead screw. The bases of the first worktable and the second worktable, which are positioned opposite each other, are connected to the corresponding bidirectional lead screws and guide rails, respectively.

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