Sealing pad cutting device

Abstract

The present invention discloses a sealing gasket cutting device, which aims to solve the problem that the existing cutting device cannot achieve complete limit fixation of the sealing gasket, resulting in easy deviation when the inner diameter is cut, thereby affecting the quality of the sealing gasket cutting. The invention includes: an up and down moving device, including a frame, a workbench and a jack arranged at the bottom of the frame, the two ends of the workbench are slidably arranged on the frame, the end of the lifting rod of the jack is connected to the bottom of the workbench, and the workbench is provided with a gasket block for placing the sealing gasket; the gasket block includes a circular boss arranged on the workbench and an upper cone arranged on the circular boss, and the outer surface of the upper cone is provided with a conical surface adapted to the inner surface of the sealing gasket; a circular hole cutter is arranged on the upper side of the workbench, and cooperates with the up and down moving device to achieve the inner diameter cutting of the sealing gasket; the present application can achieve the limit fixation of the cutting device, thereby making the sealing gasket less likely to deviate after cutting, thereby improving the cutting quality.

Description

Technical Field

[0001] The present invention relates to the technical field related to cutting equipment, and more particularly, to a sealing gasket cutting device. Background Art

[0002] With the development of the Second Industrial Revolution, electricity has been widely used in various fields and industries around the world. Power cables, the main carrier of power transmission, have also been produced and laid in large quantities in every corner of the earth. The most important link in the production of power cables is the production of cross-linked cables for tower erection. Cross-linked cable is the abbreviation for cross-linked polyethylene insulated cable. Currently, the vast majority of high-voltage cables use cross-linked polyethylene insulation. The production of cross-linked cables is closely related to sealing gaskets. Sealing gaskets are used to seal the nitrogen in the vulcanizing tube. If the sealing gasket is not good, it will lead to insufficient nitrogen pressure in the vulcanizing tube, causing air holes in the insulated wire core and causing quality problems in the wire core. The quality of the sealing gasket is also affected by the quality of the inner diameter cutting. The existing cutting device cannot achieve complete positioning and fixation of the sealing gasket, resulting in deviations when cutting the inner diameter, thus affecting the cutting quality of the sealing gasket.

[0003] Chinese Patent Publication No. CN104385340A, Publication Date March 4, 2015. The invention is titled "A Special Cutting Device for Circular Sealing Gaskets." The purpose of the invention is to design a special cutting device for circular sealing gaskets that is rationally structured and easy to use. The invention discloses a special cutting device for circular sealing gaskets, which includes a cutter, a bracket, a central support rod provided at the center of the bracket, a handle provided at the top of the central support rod, two cutters mounted on the bracket, the two cutters distributed on both sides of the central support rod, the cutters matching the slides on the bracket, and equipped with a positioning device. The invention has a rational structure and good use effect. It can realize the production of circular sealing gaskets by one person, and has high cutting efficiency and good cutting quality. However, it cannot achieve complete positioning and fixation of the sealing gasket, which leads to deviations when cutting the inner aperture, thereby affecting the quality of the cutting of the sealing gasket. Summary of the Invention

[0004] The present invention overcomes the problem that the existing cutting device cannot achieve complete limiting and fixing of the sealing gasket, which leads to deviation when the inner aperture is cut, thereby affecting the insufficient cutting quality of the sealing gasket. A sealing gasket cutting device is provided, which can achieve limiting and fixing of the cutting device, thereby making the sealing gasket less likely to deviate after cutting, thereby improving the cutting quality.

[0005] A further purpose of the present invention is to prevent the cutter head at the end of the circular hole cutter from contacting the rubber pad block, thereby protecting the circular hole cutter from cutting, reducing wear on the cutter head, and improving the accuracy of the circular hole cutter in continuous operation.

[0006] In order to solve the above technical problems, the present invention adopts the following technical solutions: a sealing gasket cutting device, comprising: an up and down moving device, including a frame, a workbench and a jack arranged at the bottom of the frame, the two ends of the workbench are slidably arranged on the frame, the end of the lifting rod of the jack is connected to the bottom of the workbench, and a gasket block for placing the sealing gasket is provided on the workbench; the gasket block includes a circular boss arranged on the workbench and an upper cone arranged on the circular boss, and the outer surface of the upper cone is provided with a conical surface adapted to the inner surface of the sealing gasket; a circular hole cutter is arranged on the upper side of the workbench, and cooperates with the up and down moving device to realize the inner aperture cutting of the sealing gasket.

[0007] The present invention provides a sealing gasket cutting device, wherein a frame includes a bottom plate arranged at the lower side of a jack, a plurality of guide slide bars are provided on the bottom plate, a top plate is provided on the upper side of the guide slide bars, and a workbench is provided on the guide slide bars between the bottom plate and the top plate; a circular hole cutter can be replaced according to the size of the inner hole diameter of the sealing gasket, the wall thickness at the die mouth of the circular hole cutter is 0.5 mm, that is, φD1+1=φD2, an inclined cutting surface is provided on the outer side surface of the end of the circular hole cutter, which is convenient for cutting the inner hole diameter of the sealing gasket, and the hardness of the end head of the circular hole cutter reaches HRC50-60 after heat treatment; the sealing gasket Pad: When the circular hole cutter cuts the rubber pad, ensure that the cutting edge of the cutter is intact and undamaged, and the angle of the pad is perfectly matched with the angle of the pad, so that the opening of each rubber pad is smooth and burr-free after cutting; if the surface of the pad is severely worn due to excessive cutting times, the surface of the pad can be re-polished to meet the cutting requirements again; in specific implementation, first replace the appropriate circular hole cutter according to the cutting aperture requirements, then place the sealing rubber pad on the rubber pad block on the workbench, and then drive the jack to move the workbench at a uniform speed along the guide slide bar, so that the sealing rubber pad and the circular hole cutter gradually approach each other, and then perform circular hole cutting. This application realizes the free cutting of the inner aperture of the sealing rubber pad, and the rubber pad can be cut anytime and anywhere according to any cable specifications. After each rubber pad is cut, the opening of the rubber pad is smooth and burr-free; the sealing rubber pad block and the circular hole cutter can be recycled, which greatly reduces production costs.

[0008] Preferably, a buffer mechanism is provided in the conical surface of the upper cone, and the buffer mechanism comprises a buffer ring slidably arranged in the conical surface, and a plurality of telescopic springs arranged at equal intervals are provided in the buffer ring and between the upper cone.

[0009] The buffer mechanism is designed so that the cutter head at the end of the circular hole cutter does not need to contact the rubber pad block when the circular hole cutter completes cutting, thereby reducing wear of the cutter head, increasing the service life of the cutter head, and improving the continuous working accuracy of the circular hole cutter, thereby greatly improving the cutting accuracy of the sealing rubber pad; at the same time, the cutting blade surface of the circular hole cutter first contacts the buffer ring, and the cutting protection of the circular hole cutter is achieved under the elastic force of the telescopic spring.

[0010] Preferably, a first trigger block is provided at the bottom of the buffer ring, and a second trigger block is provided within the upper cone below the buffer ring. When the first and second trigger blocks come into contact under the action of the circular hole cutter, electrical signals are communicated, thereby transmitting a position signal to the control system, which can then control the jack to stop its upward movement.

[0011] Preferably, the end of the buffer ring close to the center of the tapered surface is inclined with a tapered inclined surface, so as to protect the cutting guide surface of the circular hole cutter.

[0012] Preferably, the buffer ring is composed of a buffer ring body and a sliding ring body. The buffer ring body is made of rubber material to elastically protect the cutting knife, and the sliding ring body is made of hard material to guide sliding, thereby facilitating buffering and protecting the circular hole cutting knife.

[0013] Preferably, the upper cone is divided by a buffer ring, with the conical surface near the center being a smooth section, and the conical surface near the upper surface of the circular boss being a beveled tooth surface; the beveled tooth surface is composed of a plurality of beveled teeth inclined toward the center of the upper cone. The circular hole cutter's cutting guide surface is an inclined surface, which, when cutting the sealing gasket, exerts an oblique downward squeezing force on the lower portion of the sealing gasket, easily causing the sealing gasket to deform. The cutting tooth surface can increase frictional resistance, thereby increasing resistance during cutting of the sealing gasket, thereby reducing deformation and further improving the cutting accuracy of the circular hole cutter on the sealing gasket.

[0014] Preferably, the circular boss is provided with a position-limiting fastening device, which is composed of a plurality of position-limiting fastening units disposed within the outer wall of the circular boss. The position-limiting fastening device allows the placed sealing gasket to be centered and aligned; the centered sealing gasket can also be secured at multiple points around the circumference, improving stability during cutting.

[0015] Preferably, the position-limiting and fastening unit includes a screw mechanism and a fixing mechanism. The screw mechanism includes a servo motor and a screw disposed on the servo motor output shaft. The fixing mechanism includes a slider and a clamping assembly disposed on the slider, and the screw is threadedly connected to the slider. The servo motors in each position-limiting and fastening unit are synchronously controlled and driven; manually assisting in lifting the pressure block, the servo motor is then driven to rotate the screw, thereby driving the slider to move away from or toward the center of the circular boss, thereby achieving centering calibration of the sealing gasket.

[0016] Preferably, the clamping assembly includes a plurality of slide rods fixed on the upper side of the slider, a limit block provided at the end of the slide rod away from the slider, a pressure block provided on the slide rod, a pressure spring provided between the limit block and the pressure block, and a limit rod provided at the end of the pressure block away from the slider. The sealing gasket is provided with a plurality of circular holes along its circumference; the clamping assembly can be used for limiting and fastening the various positions containing the circular holes on the sealing gasket, that is, the pressure block is pressed against the upper surface of each point around the sealing gasket under the action of the pressure spring, and at the same time, the limit rod passes through the circular hole to achieve limiting and fastening of the sealing gasket.

[0017] Compared with the prior art, the beneficial effects of the present invention are as follows: (1) the present application realizes the free cutting of the inner diameter of the sealing gasket, and the gasket can be cut anytime and anywhere according to any cable specifications. After each gasket is cut, the gasket mouth is smooth and burr-free; (2) the sealing gasket block and the circular hole cutter can be recycled, which greatly reduces the production cost; (3) by setting the buffer mechanism and the reserved groove, the cutting blade of the circular hole cutter is first contacted with the buffer ring, thereby reducing the wear of the cutter head, increasing the service life of the cutter head, and improving the continuous working accuracy of the circular hole cutter; (4) by setting the bevel tooth surface, the friction resistance to the sealing gasket is increased, so that the resistance when cutting the sealing gasket is greater, thereby reducing the deformation of the circular hole cutter when cutting the sealing gasket, and thus improving the cutting accuracy of the circular hole cutter on the sealing gasket; (5) by the design of the trigger block 1 and the trigger block 2 72, the overall automation level of the cutting device is improved; (6) by the design of the limiting fastening unit, the centering calibration and compression fixation of the sealing gasket can be achieved. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a structural schematic diagram of a sealing gasket cutting device of the present invention;

[0019] Figure 2 It is a structural schematic diagram of the rubber pad block of the present invention;

[0020] Figure 3 yes Figure 2 A partial enlarged view of the “A” in the middle;

[0021] Figure 4 yes Figure 2 A partial enlarged view of the area "B" in the middle;

[0022] In the figure: up and down moving device 1; workbench 11; jack 12; bottom plate 13; guide slide rod 14; top plate 15; sealing rubber pad 2; rubber pad block 3; circular boss 31; upper cone 32; conical surface 321; annular slide groove 322; conical inclined surface 323; reserved groove 324; circular hole cutter 4; buffer mechanism 5; buffer ring 51; buffer ring body 511; sliding ring body 512; telescopic spring 52; oblique tooth surface 61; oblique teeth 62; trigger block 1 71; trigger block 2 72; limit fastening unit 8; servo motor 81; screw 82; slider 83; slide rod 84; limit block 85; pressure block 86; compression spring 87; limit rod 88. DETAILED DESCRIPTION

[0023] The technical solution of the invention is further described in detail below through specific embodiments and in conjunction with the accompanying drawings:

[0024] Specific embodiment 1: see attached Figure 1 , a sealing gasket cutting device includes: an up and down moving device 1, including a frame, a workbench 11 and a jack 12, the frame includes a bottom plate 13 arranged at the lower side of the jack 12, four vertically installed guide slides 14 are provided on the bottom plate 13, and a top plate 15 is provided on the upper side of the guide slides 14, the workbench 11 is slidably arranged on the guide slides 14 between the bottom plate 13 and the top plate 15, and the lifting rod end of the jack 12 is fixedly connected to the bottom of the workbench 11, and a gasket block 3 for placing the sealing gasket 2 is provided on the workbench 11; the gasket block 3 includes a circular boss 31 arranged on the workbench 11 and an upper cone 32 arranged on the circular boss 31, and the outer surface of the upper cone 32 is provided with a conical surface 321 adapted to the inner surface of the sealing gasket 2; the circular hole cutter 4 is arranged on the upper side of the workbench 11, and cooperates with the up and down moving device to realize the inner diameter cutting of the sealing gasket 2.

[0025] The circular hole cutter 4 can be replaced according to the inner diameter of the sealing gasket 2. The wall thickness of the circular hole cutter 4 at the die mouth is 0.5mm, that is, φD1+1=φD2. The outer surface of the end of the circular hole cutter 4 is provided with an inclined knife cutting surface, which is convenient for cutting the inner diameter of the sealing gasket 2. The end of the circular hole cutter has a hardness of HRC50~60 after heat treatment; Gasket block 3: When the circular hole cutter 4 cuts the gasket, ensure that the cutting edge of the cutter is intact and undamaged, and the angle of the gasket block is perfectly matched with the angle of the gasket, so that the gasket mouth of each gasket block 3 is smooth and burr-free after cutting; due to too many cutting times, the surface of the gasket block is severely worn, and the surface of the gasket block can be re-polished to meet the cutting requirements again. Specific implementation method:

[0027] The present invention provides a sealing gasket cutting device. Specifically, in practice, the appropriate circular hole cutter 4 is first replaced according to the required cutting aperture, and then the sealing gasket 2 is placed on the gasket pad 3 on the workbench 11. The jack 12 is then driven to move the workbench 11 at a uniform speed along the guide slide 14, so that the sealing gasket 2 and the circular hole cutter 4 gradually approach each other, and then the inner diameter of the hole is cut. This application realizes the free cutting of the inner diameter of the sealing gasket, and the sealing gasket can be cut anytime and anywhere according to any cable specification. After each gasket is cut, the gasket mouth is smooth and burr-free. The gasket pad and circular hole cutter can be recycled, greatly reducing production costs. Specific embodiment 2

[0029] See attached Figure 1-3 This embodiment is based on the specific embodiment 1 and adds a buffer mechanism 5. An annular groove 322 is provided in the conical surface 321 of the upper cone 32. The buffer mechanism 5 is slidably set in the annular groove 322. The buffer mechanism 5 includes a buffer ring 51 slidably set in the annular groove 322. The buffer ring 51 is composed of a buffer ring body 511 and a sliding ring body connection 512. The buffer ring body 511 is made of rubber and provides elastic protection for the cutting knife. The sliding ring body 512 is made of hard material and is used for guiding sliding, so as to facilitate the buffering protection of the circular hole cutter 4. A plurality of telescopic springs 52 are arranged at equal intervals in the circumferential direction between the bottom of the sliding ring body 512 and the bottom 322 of the annular groove. A conical inclined surface 323 is inclined at the end of the buffer ring 51 close to the center side of the conical surface 321.

[0030] When the circular hole cutter 4 completes cutting the sealing rubber gasket 2, the cutter head at the end of the circular hole cutter 4 does not need to contact the rubber gasket block, but first enters the reserved groove 324 formed between the conical inclined surface 323 and the annular slide groove 322, so that the cutting blade surface of the circular hole cutter 4 first contacts the buffer ring 51, thereby reducing the wear of the cutter head, increasing the service life of the cutter head, and improving the accuracy of the continuous operation of the circular hole cutter 4; at the same time, the circular hole cutter 4 will continue to move downward for a distance (this moving distance is not easy to detect), so that it squeezes and pushes the buffer ring 51, thereby pushing the compression of the telescopic spring 52, and the buffer ring 51 realizes cutting protection for the circular hole cutter 4 under the reaction force of the telescopic spring 52. Specific embodiment 3

[0032] See attached Figure 1-3 This embodiment is a further improvement on the first embodiment. The upper cone 32 is divided by the buffer ring 51. The tapered surface 321 near the center is a smooth section, while the tapered surface 321 near the upper surface of the circular boss 31 is a beveled tooth surface 61. The beveled tooth surface 61 is composed of a plurality of beveled teeth 62 inclined toward the center of the upper cone 32. The cutting guide surface of the circular hole cutter 4 is an inclined surface.

[0033] When the sealing rubber gasket 2 is cut, an oblique downward squeezing force is generated on the lower part of the sealing rubber gasket 2, which easily causes the sealing rubber gasket 2 to deform. The cutting tooth surface can increase the friction resistance, making the resistance greater when the sealing rubber gasket 2 is cut, thereby reducing the deformation of the circular hole cutter 4 when cutting the sealing rubber gasket 2, thereby improving the cutting accuracy of the circular hole cutter on the sealing rubber gasket 2.

[0034] See attached Figure 1-3 This embodiment is a further improvement on the basis of embodiment 2. A trigger block 1 71 is provided at the bottom of the sliding ring 512, and a trigger block 2 72 is provided at the bottom of the annular chute. This structural design improves the overall automation level of the cutting device.

[0035] When the buffer ring 51 moves downward under the push of the circular hole cutter 4, it will drive the trigger block 1 71 to move toward the trigger block 2 72, and make the trigger block 1 71 and the trigger block 2 72 complete contact to form an energized circuit, thereby realizing the connection of the electrical signal, so that the control system receives the arrival signal, and the control system can control the jack 12 to stop moving upward. Specific embodiment 5

[0037] See attached Figure 1-4 This embodiment, based on the first embodiment, incorporates a position-limiting fastening device, which is disposed on the circular boss 31 and comprises a plurality of position-limiting fastening units 8 disposed within the outer wall of the circular boss 31. The position-limiting fastening device allows for the centering of the placed sealing gasket 2 and allows for multiple circumferential fixation of the centered sealing gasket 2, thereby improving its stability during cutting.

[0038] The position-limiting and fastening unit 8 comprises a screw mechanism and a fixing mechanism. The screw mechanism comprises a servo motor 81 and a screw 82 mounted on the output shaft of the servo motor 81. The fixing mechanism comprises a slider 83 and a clamping assembly mounted on the slider 83. The screw 82 is threadedly connected to the slider 83. The servo motors 81 in each position-limiting and fastening unit 8 are controlled and driven synchronously. Driving the servo motors 81 rotates the screw 82, thereby moving the slider 83 away from or toward the center of the circular boss 31, thereby achieving centering and calibration of the sealing gasket 2.

[0039] The clamping assembly includes a plurality of slide bars 84 fixed to the upper side of a slider 83. A stop block 85 is provided at the end of the slide bar 84 away from the slider 83. A pressure block 86 is provided on the slide bar 84. A pressure spring 87 is provided between the stop block 85 and the pressure block 86. A limit rod 88 is provided at the end of the pressure block 86 away from the slider 83. The sealing gasket 2 is provided with a plurality of circular holes along its circumference. The clamping assembly can be used to limit and tighten the various locations on the sealing gasket 2 containing the circular holes. That is, the pressure block 86, under the action of the pressure spring 87, is pressed against the upper surface of each point around the sealing gasket 2. At the same time, the limit rod passes through the circular hole to achieve limit and tightening of the sealing gasket 2. Specific implementation method:

[0041] When the sealing gasket 2 placed on the gasket block 3 needs to be centered, the pressure block 86 is first lifted manually, and then the servo motor 81 is driven to drive the screw 82 to rotate, thereby driving the slider 83 to move toward the center of the circular boss 31 to achieve the centering calibration of the sealing gasket 2.

[0042] When the sealing gasket 2 that has completed centering calibration needs to be limited and fixed, the pressure block 86 and the limiting rod 88, under the action of the clamping spring 87, first move to one side of the circular hole to limit and tighten the sealing gasket 2, and the end of the limiting rod 88 passes through the circular hole and adapts to the upper surface of the circular boss 31.

[0043] The above-described embodiments are only preferred solutions of the present invention and are not intended to limit the present invention in any form. Other variations and modifications are possible without exceeding the technical solutions described in the claims.

Claims

1. A sealing gasket cutting device, characterized in that: include: The up-and-down moving device includes a frame, a workbench, and a jack arranged at the bottom of the frame. The two ends of the workbench are slidably arranged on the frame. The end of the jacking rod of the jack is connected to the bottom of the workbench. The workbench is provided with a rubber pad block for placing a sealing rubber pad. The rubber pad block includes a circular boss arranged on the workbench and an upper cone arranged on the circular boss. The outer surface of the upper cone is provided with a conical surface adapted to the inner surface of the sealing rubber pad. A circular hole cutter is arranged on the upper side of the workbench and cooperates with the up-and-down moving device to achieve the inner diameter cutting of the sealing rubber pad. A buffer mechanism is provided in the conical surface of the upper cone, and the buffer mechanism includes a buffer ring slidably arranged in the conical surface, and a plurality of equally spaced telescopic springs are provided between the buffer ring and the upper cone; A trigger block 1 is provided at the bottom of the buffer ring, a trigger block 2 is provided in the upper cone on the lower side of the buffer ring, a conical inclined surface is inclined at the end of the buffer ring close to the center side of the conical surface, the buffer ring is composed of a buffer ring body and a sliding ring body connected, the upper cone uses the buffer ring as the dividing line, the conical surface close to the center side is a smooth section, and the conical surface close to the upper surface of the circular boss is a bevel tooth surface; the bevel tooth surface is composed of a number of bevel teeth inclined toward the center side of the upper cone.

2. A sealing gasket cutting device according to claim 1, characterized in that: A position-limiting fastening device is provided on the circular boss, and the position-limiting fastening device is composed of a plurality of groups of position-limiting fastening units arranged inside the outer wall of the circular boss.

3. A sealing gasket cutting device according to claim 1 or 2, characterized in that: The limiting fastening unit includes a screw mechanism and a fixing mechanism. The screw mechanism includes a servo motor and a screw arranged on the output shaft of the servo motor. The fixing mechanism includes a slider and a pressing assembly arranged on the slider. The screw is threadedly connected to the slider.

4. A sealing gasket cutting device according to claim 3, characterized in that: The clamping assembly includes several sliding rods fixed on the upper side of the slider, a limit block is provided at the end of the sliding rod away from the slider, a pressure block is provided on the sliding rod, a clamping spring is provided between the limit block and the pressure block, and a limit rod is provided at the end of the pressure block away from the slider.

5. The sealing gasket cutting device according to claim 1, characterized in that: The frame comprises a bottom plate arranged at the lower side of the jack, a plurality of guide slide bars are arranged on the bottom plate, a top plate is arranged on the upper side of the guide slide bars, and a workbench is arranged on the guide slide bars between the bottom plate and the top plate.

6. The sealing gasket cutting device according to claim 1, characterized in that: An inclined cutting surface is provided on the outer side surface of the end portion of the circular hole cutter.

7. The sealing gasket cutting device according to claim 4, characterized in that: The sealing gasket is provided with a plurality of circular holes in its circumference, and the pressing assembly is used for limiting and fastening the various positions containing the circular holes on the sealing gasket, and the limiting rod passes through the circular holes.

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