Soft backed cutting device

Abstract

The application provides a soft lining cutting device, and relates to the technical field of cutting devices.The soft lining cutting device comprises a support, a cutting part, a pressing device and a transmission device.The support comprises three support parts, which are used for contacting the soft lining to form an abutting plane;the cutting part is slidably installed on the support along the X-axis direction and the Z-axis direction;the X-axis direction is perpendicular to the abutting plane, and the Z-axis direction is parallel to the abutting plane;the pressing device is installed between the support and the cutting part to press the soft lining along the X-axis direction;the transmission device is installed on the support and drives the cutting part to slide along the Z-axis direction, so that the soft lining is cut.The cutting device is simple to operate when the soft lining is sampled, the sample is complete, and is suitable for the tensile test of the aging evaluation of the soft lining.

Description

Technical Field

[0001] This invention relates to the field of cutting device technology, and more specifically to a soft lining cutting device. Background Technology

[0002] Soft linings typically refer to the use of soft materials as a lining layer on the inner wall of equipment or pipelines to protect the substrate from corrosive media, such as rubber linings. Rubber linings possess high chemical stability and excellent wear resistance, acid resistance, alkali resistance, oil resistance, and airtightness. They can prevent the metal substrate of the equipment from direct contact with corrosive media, effectively protecting the equipment from corrosive damage. The service life of rubber linings is generally 10-15 years. After aging and failure, cracks and detachment occur, allowing highly corrosive media to penetrate the rubber lining and directly contact the metal substrate, leading to rapid corrosion, perforation, and leaks. Furthermore, aging rubber linings are prone to large-scale detachment, which can clog titanium pipes, pipelines, valves, pumps, filters, and heat exchangers, causing significant economic losses. The in-service aging condition of soft linings is generally assessed through on-site pull-out tests. When preparing samples for aging assessment of soft linings such as rubber, it is very difficult to use a scraper to prepare the samples, which can easily lead to irreversible defects such as incompleteness or damage in the prepared samples. Summary of the Invention

[0003] In view of the problems existing in the prior art, the present invention provides a soft lining cutting device to improve the problem of difficult sampling of soft lining during soft lining pull-out tests.

[0004] To achieve the above and other related objectives, the present invention provides a soft lining cutting device, comprising a support, a cutting part, a clamping device, and a transmission device. The support includes three support parts for contacting the soft lining to form an abutment plane. The cutting part is slidably mounted on the support along the X-axis and Z-axis directions, respectively. The X-axis direction is perpendicular to the abutment plane, and the Z-axis direction is parallel to the abutment plane. The clamping device is installed between the support and the cutting part to press the cutting part against the soft lining along the X-axis direction. The transmission device is mounted on the support and drives the cutting part to slide along the Z-axis direction, thereby cutting the soft lining.

[0005] In one embodiment of the present invention, the cutting part includes a first blade, a second blade, and a third blade, wherein the second blade and the third blade are disposed opposite to each other at both ends of the first blade.

[0006] In one embodiment of the present invention, the cutting part further includes a fourth blade, which is disposed on the side of the first blade facing the bracket, and the fourth blade is slidably connected to the first blade.

[0007] In one embodiment of the present invention, the fourth blade is provided with a groove on the side facing the first blade, and the first blade is provided with a guide rail that matches the groove on the side facing the fourth blade.

[0008] In one embodiment of the present invention, the cutting device further includes a first driving device for driving the fourth blade to move, the first driving device being disposed between the bracket and the cutting section.

[0009] In one embodiment of the present invention, the output end of the first driving device is an eccentric wheel, the eccentric wheel is provided with a first guide shaft, the fourth blade is provided with a guide hole that matches the first guide shaft, and the first guide shaft slides in the guide hole.

[0010] In one embodiment of the present invention, the clamping device includes a connecting shaft, a first connecting plate, and a second connecting plate. The connecting shaft is slidably connected to the transmission device. The first connecting plate is fixedly disposed at the top of the connecting shaft, and the second connecting plate is fixedly disposed at the bottom of the connecting shaft. The clamping device further includes a first telescopic structure and a second telescopic structure. The first telescopic structure and the second telescopic structure are disposed within a bracket. The first telescopic structure drives the first connecting plate to slide along the X-axis direction, and the second telescopic structure drives the second connecting plate to slide along the X-axis direction.

[0011] In one embodiment of the present invention, the transmission device includes a second driving device, a transmission shaft, a screw, a conversion element, and a crossbeam. The transmission shaft is fixedly connected to the output end of the second driving device. The transmission shaft is mounted on the bracket in a horizontal direction and is parallel to the abutment plane. The screw is mounted on the bracket in a vertical direction and is connected to the transmission shaft via the conversion element. The crossbeam is perpendicular to and slidably connected to the connecting shaft. The crossbeam is fixedly connected to the cutting part and is fitted onto the screw and moves along the screw.

[0012] In one embodiment of the present invention, the cutting device further includes a first limiting device for guiding the cutting portion, the first limiting device being fixedly connected to the bracket.

[0013] In one embodiment of the present invention, the cutting device further includes a second limiting device disposed on both sides of the first limiting device, and the second limiting device is provided with a limiting hole for the transmission shaft to pass through.

[0014] The soft lining cutting device of the present invention has three support parts on the bracket to form a contact plane with the soft lining. The cutting part is mounted on the bracket and can slide in a direction parallel to the contact plane under the drive of the transmission device to cut the soft lining. Under the drive of the clamping device, it slides in a direction perpendicular to the contact plane to press the soft lining, so as to realize the cutting part penetrates the thickness of the soft lining and ensure the cutting effect of the cutting device. Attached Figure Description

[0015] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other embodiments can be obtained based on these drawings without creative effort.

[0016] Figure 1 This is a schematic diagram of the soft lining cutting device of the present invention before cutting in one embodiment;

[0017] Figure 2 This is a schematic diagram of the soft lining cutting device of the present invention from another angle before cutting in one embodiment;

[0018] Figure 3 This is a schematic diagram of the cutting section in one embodiment of the soft lining cutting device of the present invention;

[0019] Figure 4 This is a schematic diagram of the assembly of the first blade, the second blade, and the third blade in one embodiment of the soft lining cutting device of the present invention;

[0020] Figure 5 This is a schematic diagram of the structure of the fourth blade in one embodiment of the soft lining cutting device of the present invention;

[0021] Figure 6 This is a schematic diagram showing the assembly of the clamping device, transmission device, and cutting part in one embodiment of the soft lining cutting device of the present invention.

[0022] Figure 7 for Figure 6 A magnified view of a portion of region A in the middle;

[0023] Figure 8 This is a schematic diagram of the cutting process in one embodiment of the soft lining cutting device of the present invention.

[0024] Component designation explanation:

[0025] 100, bracket; 110, support part; 120, handheld part; 130, first support member; 140, second support member; 150, arc-shaped connector; 200, cutting part; 210, first blade; 211, guide rail; 220, second blade; 221, first stop; 230, third blade; 231, second stop; 240, fourth blade; 241, slide groove; 242, guide hole; 243, slide rod; 300, clamping device; 310, connecting shaft; 320, first connecting plate; 330, the first... Two connecting plates; 340, first telescopic structure; 350, second telescopic structure; 400, transmission device; 410, second drive device; 420, drive shaft; 430, screw; 440, conversion component; 450, crossbeam; 500, first drive device; 510, connecting part; 520, connecting rod; 530, eccentric wheel; 531, first guide shaft; 540, second guide shaft; 600, first limiting device; 610, baffle; 611, guide groove; 700, second limiting device; 710, limiting hole. Detailed Implementation

[0026] The following specific examples illustrate the implementation of the present invention. Those skilled in the art can easily understand other advantages and effects of the present invention from the content disclosed in this specification. The present invention can also be implemented or applied through other different specific embodiments, and various details in this specification can also be modified or changed based on different viewpoints and applications without departing from the spirit of the present invention. It should be noted that, unless otherwise specified, the following embodiments and features can be combined with each other. It should also be understood that the terminology used in the embodiments of the present invention is for describing specific implementation schemes and not for limiting the scope of protection of the present invention. Test methods in the following embodiments that do not specify specific conditions are generally performed under conventional conditions or according to the conditions recommended by the respective manufacturers.

[0027] When numerical ranges are given in the embodiments, it should be understood that, unless otherwise stated in the present invention, both endpoints of each numerical range and any value between the two endpoints may be selected. Unless otherwise defined, all technical and scientific terms used in this invention, as well as the prior art known to those skilled in the art and the description of the invention, may be implemented using any prior art methods, devices, and materials similar to or equivalent to the methods, devices, and materials in the embodiments of the present invention.

[0028] It should be noted that the terms such as "upper", "lower", "left", "right", "middle" and "one" used in this specification are only for clarity of description and are not intended to limit the scope of the invention. Changes or adjustments to their relative relationships, without substantially altering the technical content, should also be considered as part of the scope of the invention.

[0029] In some large equipment, soft linings such as rubber are often installed to prevent the metal substrate of the equipment from directly contacting corrosive media, effectively protecting the equipment from corrosion damage. The corrosion resistance and lifespan of soft linings such as rubber are far superior to those of anti-corrosion coatings. To avoid lining aging failure or lining detachment that could clog pipes, valves, pumps, filters, and heat exchangers, resulting in economic losses, it is necessary to conduct on-site pull-out tests on the soft lining to assess its in-service aging status. Due to the strong bond between the soft lining and the substrate, sample preparation using a scraper is very difficult, leading to irreversible defects such as incompleteness and breakage in the prepared samples. Therefore, this invention provides a cutting device for soft linings, which cuts the soft lining on the substrate to prepare samples for pull-out tests. The cutting device of this application prepares complete and undamaged samples, and is applicable to sampling soft linings in various spaces, especially confined spaces such as the inside of storage tanks.

[0030] Please see Figures 1 to 8 This invention provides a soft lining cutting device, which includes a support 100, a cutting section 200, a clamping device 300, and a transmission device 400. The support 100 abuts against the soft lining, the clamping device 300 presses the cutting section 200 against the soft lining to ensure the cutting depth of the cutting section 200, and the transmission device 400 drives the cutting section 200 to move to cut the soft lining. The cutting device of this application is easy to use, cuts the soft lining completely, and can be used for aging assessment and pull-out testing of soft linings.

[0031] Please see Figure 1 and Figure 2 In one embodiment, the bracket 100 includes three support portions 110, which are used to contact the soft liner to form an abutment plane, thereby ensuring the stability of the cutting device. In other embodiments, the bracket 100 may also include four, five, or more support portions 110. The number of support portions 110 is not limited in this application, as long as multiple support portions 110 are on the same plane. Furthermore, the support portions 110 are made of rubber to increase the friction between the support portions 110 and the soft liner, ensuring the stability of the cutting device throughout the cutting process. The material of the bracket 100 is not limited here; the strength of the support frame is sufficient for the application requirements. For example, the bracket 100 is made of alloy tubing, which has high strength and is lightweight, making it easy to carry and transport.

[0032] Please see Figure 1 and Figure 2In one embodiment, the support 100 includes a handle 120 and a first support member 130 and a second support member 140 fixedly connected to the handle 120. One end of the first support member 130 is fixedly connected to the top of the handle 120, and the other end of the first support member 130 extends in a direction perpendicular to the handle 120. Two support portions 110 are provided at the end of the first support member 130 opposite to the handle 120. The second support member 140 is arranged parallel to the first support member 130. One end of the second support member 140 is fixedly connected to the bottom of the handle 120, and the other end of the second support member 140 extends in the same direction as the first support member 130. One support portion 110 is provided at the end of the second support member 140 opposite to the handle 120. In other embodiments, one support portion 110 may be provided on the first support member 130, and two support portions 110 may be provided on the second support member 140. Furthermore, the handheld part 120 is connected to the first support member 130 through the arc-shaped connector 150, which can reduce stress concentration, reduce the risk of fatigue failure of the structure, and improve the structural stability.

[0033] Please see Figures 1 to 5 In one embodiment, the cutting portion 200 is slidably mounted on the bracket 100 along the X-axis and Z-axis directions, respectively; wherein the X-axis direction is perpendicular to the abutment plane formed by the three support portions 110, and the Z-axis direction is parallel to the abutment plane formed by the three support portions 110. In this invention, the cutting portion 200 can be any structure that contacts the soft lining and scrapes an opening in the soft lining during sliding along the Z-axis direction. In this embodiment, the cutting portion 200 includes a first blade 210, a second blade 220, and a third blade 230, with the second blade 220 and the third blade 230 disposed opposite each other at both ends of the first blade 210. The first blade 210 is used to separate the soft lining from the substrate, and the second blade 220 and the third blade 230 are used to peel the soft lining separated from the substrate from the lining as a whole. Further, the cutting portion 200 also includes a fourth blade 240, which is disposed on the side of the first blade 210 facing the bracket 100, and the fourth blade 240 is slidably connected to the first blade 210. In this embodiment, a groove 241 is provided on the side of the fourth blade 240 facing the first blade 210, and a guide rail 211 matching the groove 241 is provided on the side of the first blade 210 facing the fourth blade 240. The fourth blade 240 can slide back and forth along the guide rail 211 on the first blade 210 in the Y-axis direction, which allows for better separation of the soft substrate from the matrix and also prevents jamming caused by the high toughness and elasticity of the soft liner. To obtain a better scraping effect, preferably, the angle α between the first blade 210 and the fourth blade 240 and the vertical direction is 15°, making it easier for the cutting part 200 to cut into the soft liner.

[0034] Please see Figure 6 and Figure 8 In one embodiment, a clamping device 300 is installed between the bracket 100 and the cutting part 200 to press the soft lining with the cutting part 200 along the X-axis direction. The clamping device 300 cooperates with the transmission device 400 to apply cutting pressure and peeling force to the cutting part 200 during the cutting process, ensuring that the soft lining of the cutting part 200 is cut along the X-axis and Z-axis directions. In this embodiment, the clamping device 300 includes a connecting shaft 310, a first connecting plate 320, and a second connecting plate 330. The connecting shaft 310 is slidably connected to the transmission device 400, the first connecting plate 320 is fixedly disposed on the top of the connecting shaft 310, and the second connecting plate 330 is fixedly disposed on the bottom of the connecting shaft 310. Furthermore, the clamping device 300 also includes a first telescopic structure 340 and a second telescopic structure 350. The first telescopic structure 340 and the second telescopic structure 350 are disposed within the bracket 100. The first telescopic structure 340 presses against the first connecting plate 320, which slides along the X-axis, and the second telescopic structure 350 presses against the second connecting plate 330, which slides along the X-axis. During the cutting process, the first telescopic structure 340 clamps against the first connecting plate 320, and the second telescopic structure 350 clamps against the second connecting plate 330. The first connecting plate 320 pushes the top of the connecting shaft 310, and the second connecting plate 330 pushes the bottom of the connecting shaft 310. The connecting shaft 310 pushes the transmission device 400, which drives the cutting part 200 to press against the soft liner along the X-axis, ensuring the cutting depth of the cutting part 200. In this embodiment, both the first telescopic structure 340 and the second telescopic structure 350 are made of elastic telescopic material. Elastic telescopic material can deform within a large range of tensile and compressive forces, withstand certain impacts and vibrations, and its shape and properties do not change significantly after repeated stretching and compression, exhibiting high durability. Even under prolonged cyclic loads, the performance of the elastic telescopic material does not significantly decrease. In other embodiments, the first telescopic structure 340 and the second telescopic structure 350 can also be any other device capable of driving the connecting shaft 310. Preferably, in this example, it is a spring, with one end of the spring compressed and deformed abutting against the bracket 100, and the other end abutting against the first connecting plate 320 or the second connecting plate 330.

[0035] Please see Figure 2The transmission device 400 is mounted on the bracket 100 and drives the cutting part 200 to slide along the Z-axis direction, thereby cutting the soft lining. In one embodiment, the transmission device 400 includes a second driving device 410, a transmission shaft 420, a screw 430, a conversion element 440 (simplified in the figure), and a crossbeam 450. The transmission shaft 420 is fixedly connected to the output end of the second driving device 410, and the transmission shaft 420 is arranged horizontally and parallel to the abutment plane. The screw 430 is mounted vertically on the bracket 100 and is connected to the transmission shaft 420 via the conversion element 440. The crossbeam 450 is arranged perpendicularly to the connecting shaft 310 and is slidably connected. The bottom of the crossbeam 450 is engaged with the transmission shaft 420. The crossbeam 450 is fixedly connected to the cutting part 200, and the crossbeam 450 is threadedly connected to the screw 430 and moves along the axial direction of the screw 430 during the rotation of the screw 430. For example, the conversion component 440 is a bevel gear set, that is, bevel gears are provided at the connection between the drive shaft 420 and the screw 430. The two bevel gears mesh with each other, thereby transmitting the force of the drive shaft 420 to the screw 430 and realizing the change of rotation direction. In this embodiment, the transmission device 400 includes two screws 430, which are arranged parallel to each other on both sides of the handheld part 120 and parallel to the connecting shaft 310. The two screws 430 are respectively connected to both ends of the drive shaft 420 through a bevel gear set. One end of the crossbeam 450 is threaded to one of the screws 430, and the other end of the crossbeam 450 is threaded to the other drive shaft 420. When cutting the soft lining using the cutting device, the second drive device 410 drives the transmission shaft 420 to rotate. The transmission shaft 420 drives two screws 430 to rotate via the conversion component 440. The two screws 430 further drive the crossbeam 450 to move along the screws 430. The crossbeam 450 drives the cutting part 200 to slide along the Z-axis, thereby achieving the cutting of the soft lining. In this application, the second drive device 410 can be any device capable of driving the transmission shaft 420 to rotate. In this embodiment, the second drive device 410 is a hand-cranked power input device. Specifically, the second drive device 410 is a handle, one end of which is fixedly connected to the transmission shaft 420. Rotating the handle drives the transmission shaft 420 to rotate, and the cutting speed of the cutting part 200 can be controlled by controlling the rotation speed of the handle. In other embodiments, the second drive device 410 can also be a mechanical drive device.

[0036] Please see Figure 1 , Figure 2 , Figure 6 and Figure 7In one embodiment, the cutting device further includes a first driving device 500 for driving the fourth blade 240 to move. The first driving device 500 is disposed between the support 100 and the cutting part 200. One end of the housing of the first driving device 500 is fixedly connected to the transmission device 400, and the other end of the housing of the first driving device 500 is fixedly connected to the cutting part 200. For example, the housing of the first driving device 500 is provided with a connecting part 510 for connecting to the cutting part 200. The housing of the first driving device 500 and the cutting part 200 are fixedly connected by a connecting rod 520. Specifically, the connecting part 510 is provided with a through hole for the connecting rod 520 to pass through. The connecting part 510 extends into the cavity formed by the first blade 210, the second blade 220, and the third blade 230. The connecting rod 520 extends from the side of the second blade 220 away from the third blade 230, passes through the through hole on the connecting part 510, and extends out from the side of the third blade 230 away from the second blade 220. For example, there are three connecting rods 520, and the three connecting rods 520 are located on one side of the second blade 220 and are fixed by fasteners. The three connecting rods 520 are also located on one side of the second blade 220 and are fixed by fasteners, which can ensure the stability of the cutting process.

[0037] Please see 3 and Figure 7 The type of the first driving device 500 is not limited; it can be any device capable of driving the fourth blade 240 to move linearly along the Y-axis. In this embodiment, the output end of the first driving device 500 is an eccentric wheel 530, on which a first guide shaft 531 is provided. The fourth blade 240 is provided with a guide hole 242 that matches the first guide shaft 531, and the first guide shaft 531 slides within the guide hole 242. When the eccentric wheel 530 rotates, the first guide shaft 531 slides within the guide hole 242, driving the fourth blade 240 to reciprocate along the guide rail 211 in the Y-axis direction. Furthermore, in order to prevent debris from entering the blade gap and causing the blade to jam during the cutting process, a first stop 221 is provided on the top of the second blade 220, a second stop 231 is provided on the top of the third blade 230, and a slide bar 243 is provided on the fourth blade 240. The slide bar 243 passes through the first stop 221 and the second stop 231 in sequence and slides on the first blade 210.

[0038] Please see Figure 2 and Figure 3In one embodiment, the cutting device further includes a first limiting device 600 for guiding the cutting section 200. The first limiting device 600 is fixedly connected to the bracket 100 to prevent the cutting section 200 from shifting during the cutting process. In this embodiment, the first limiting device 600 includes two baffles 610, which are arranged parallel to each other in the vertical direction. The bottoms of the two baffles 610 are respectively fixedly connected to the second support member 140. The first driving device 500 is disposed between the two baffles 610 and slides along the gap between the two baffles 610 to ensure that the cutting head travels in the vertical direction during cutting. In this embodiment, the baffles 610 are also provided with guide grooves 611, the width of which matches the thickness of the soft lining. The housing of the first driving device 500 is provided with a second guide shaft 540, which slides within the guide groove 611. The top of the guide groove 611 is provided with a slope extending downward in the direction away from the support 100. For example, the angle β between the slope and the vertical direction is 30°, ensuring that the cutting angle of the cutting part 200 is less than or equal to 30°. During the cutting process, as the cutting part 200 continues to penetrate into the soft substrate, the second guide shaft 540 moves along the slope from the side of the guide groove 611 near the handheld part 120 to the side away from the handheld part 120, so that the cutting part 200 gradually penetrates into the soft lining. After the cutting part 200 penetrates the soft lining and abuts against the substrate, the second guide shaft 540 moves downward in the vertical direction along the side of the guide groove 611 away from the handheld part 120.

[0039] Please see Figure 2 In one embodiment, the cutting device further includes a second limiting device 700 disposed on both sides of the first limiting device 600. The second limiting device 700 is provided with a limiting hole 710 for the transmission shaft 420 to pass through. The transmission shaft 420 reciprocates in the X-axis direction within the limiting hole 710. Furthermore, the length of the limiting hole 710 matches the thickness of the soft liner. Before cutting, the multiple support portions 110 are all abutted against the surface of the soft liner. The soft liner generates a reaction force on the cutting portion 200. The transmission shaft 420 is located at the end of the limiting hole 710 near the handle portion 120. As the cutting portion 200 penetrates deeper into the soft liner during the cutting process, the transmission shaft 420 gradually moves away from the handle portion 120 under the drive of the clamping device 300 until the cutting portion 200 penetrates the soft liner and abuts against the substrate. At this point, the transmission shaft 420 stops moving along the limiting hole 710.

[0040] The soft lining cutting device of the present invention has three support parts on a bracket to form a contact plane with the soft lining. The cutting part is mounted on the bracket and can slide in a direction parallel to the contact plane under the drive of a transmission device to cut the soft lining. Under the drive of a clamping device, it slides in a direction perpendicular to the contact plane to press the soft lining, achieving deep penetration of the cutting part into the thickness of the soft lining and ensuring the cutting effect of the cutting device. The soft lining samples prepared by the cutting device of this application have intact structures and are undamaged, making them suitable for pull-out tests for aging assessment of soft linings. In addition, the cutting device of this application not only has the advantages of simple structure, easy operation, saving manpower and time, and improving efficiency, but also facilitates maintenance and replacement of parts. Therefore, the present invention effectively overcomes some practical problems in the prior art and has high utilization value and significance.

[0041] The above embodiments are merely illustrative of the principles and effects of the present invention and are not intended to limit the invention. Any person skilled in the art can modify or alter the above embodiments without departing from the spirit and scope of the present invention. Therefore, all equivalent modifications or alterations made by those skilled in the art without departing from the spirit and technical concept disclosed in the present invention should still be covered by the claims of the present invention.

Claims

1. A soft lining cutting device, characterized in that, include: A support (100) comprising three support portions (110) for contacting a soft lining to form an abutment plane; A cutting section (200) is slidably mounted on the bracket (100) along the X-axis and Z-axis directions, respectively; wherein the X-axis direction is perpendicular to the abutment plane, the Z-axis direction is parallel to the abutment plane, and the Z-axis direction is a vertical direction; the cutting section (200) includes a first blade (210), a second blade (220), a third blade (230), and a fourth blade (240), the second blade (220) and the third blade (230) are disposed opposite to each other at both ends of the first blade (210); the fourth blade (240) is disposed on the side of the first blade (210) facing the bracket (100), and the fourth blade (240) is slidably connected to the first blade (210); the angle α between the first blade (210) and the fourth blade (240) and the vertical direction is 15°. o ; A clamping device (300) is installed between the bracket (100) and the cutting part (200) to press the soft lining with the cutting part (200) along the X-axis direction; A transmission device (400) is mounted on the bracket (100) and drives the cutting part (200) to slide along the Z-axis direction, thereby cutting the soft lining.

2. The soft lining cutting device according to claim 1, characterized in that, The fourth blade (240) has a groove (241) on the side facing the first blade (210), and the first blade (210) has a guide rail (211) that matches the groove (241) on the side facing the fourth blade (240).

3. The soft lining cutting device according to claim 1, characterized in that, The cutting device further includes a first driving device (500) for driving the fourth blade (240) to move, the first driving device (500) being disposed between the bracket (100) and the cutting part (200).

4. The soft lining cutting device according to claim 3, characterized in that, The output end of the first drive device (500) is an eccentric wheel (530), the eccentric wheel (530) is provided with a first guide shaft (531), the fourth blade (240) is provided with a guide hole (242) that matches the first guide shaft (531), and the first guide shaft (531) slides in the guide hole (242).

5. The soft lining cutting device according to claim 1, characterized in that, The clamping device (300) includes a connecting shaft (310), a first connecting plate (320), and a second connecting plate (330). The connecting shaft (310) is slidably connected to the transmission device (400). The first connecting plate (320) is fixedly disposed on the top of the connecting shaft (310), and the second connecting plate (330) is fixedly disposed on the bottom of the connecting shaft (310). The clamping device (300) also includes a first telescopic structure (340) and a second telescopic structure (350). The first telescopic structure (340) and the second telescopic structure (350) are disposed in the bracket (100). The first telescopic structure (340) drives the first connecting plate (320) to slide along the X-axis direction, and the second telescopic structure (350) drives the second connecting plate (330) to slide along the X-axis direction.

6. The soft lining cutting device according to claim 5, characterized in that, The transmission device (400) includes a second drive device (410), a drive shaft (420), a screw (430), a conversion element (440), and a crossbeam (450). The drive shaft (420) is fixedly connected to the output end of the second drive device (410). The drive shaft (420) is mounted on the bracket (100) in a horizontal direction and is parallel to the contact plane. The screw (430) is mounted on the bracket (100) in a vertical direction and is connected to the drive shaft (420) via the conversion element (440). The crossbeam (450) is vertically arranged and slidably connected to the connecting shaft (310). The crossbeam (450) is fixedly connected to the cutting part (200) and is fitted on the screw (430) and moves along the screw (430).

7. The soft lining cutting device according to claim 6, characterized in that, The cutting device further includes a first limiting device (600) for guiding the cutting part (200), the first limiting device (600) being fixedly connected to the bracket (100).

8. The soft lining cutting device according to claim 7, characterized in that, The cutting device further includes a second limiting device (700) disposed on both sides of the first limiting device (600), and the second limiting device (700) is provided with a limiting hole (710) for the transmission shaft (420) to pass through.

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