Cutting device for hot-rolled plate production

Abstract

This invention relates to the field of hot-rolled plate production, and more particularly to a cutting device for hot-rolled plate production. A cross-cutting machine is configured in the middle of a roller conveyor. A mounting base is hydraulically liftable inside the roller conveyor. A buffer platform is horizontally slidably mounted on the upper end of the mounting base. Multiple follower rods are mounted on the buffer platform. These follower rods are pushed by the hot-rolled plate to generate independent horizontal displacements. A composite piston rod passes through the bottom of each follower rod. One end of the composite piston rod is connected to an energy storage cylinder on one side of the mounting base, and the other end is connected to an excitation cylinder on the buffer platform. In this invention, the multiple follower rods in the middle of the roller conveyor can sense contact with the end of the plate, thereby linking the internal composite piston rod and hydraulic mechanism to identify the follower rod at the most concave position and drive the cross-cutting machine to change its cutting position. This mechanical contact structure avoids the influence of environmental interference and inertial vibration on positioning, ensuring stable and accurate cutting of irregular end defects even under harsh working conditions, while maintaining cutting efficiency.

Description

Technical Field

[0001] This invention relates to the field of hot-rolled plate production technology, and in particular to a cutting device for hot-rolled plate production. Background Technology

[0002] In the production of hot-rolled steel plates, the head and tail of the plate need to be cut before finishing rolling. Traditional processes use optical sensors in conjunction with guillotine cutters. However, in high-temperature and heavy water mist environments, the sensors are easily interfered with and produce false alarms. At the same time, the high-speed movement of the several-ton steel plate has huge inertia, and the sensors have difficulty predicting the positioning deviation caused by impact and vibration. Summary of the Invention

[0003] The purpose of this invention is to address the shortcomings of existing technologies by providing a cutting device for hot-rolled plate production.

[0004] To achieve the above objectives, the present invention adopts the following technical solution: A cutting device for hot-rolled plate production includes a roller conveyor, a cross-cutting machine is arranged in the middle of the roller conveyor, and a mounting base is hydraulically liftable inside the roller conveyor. A buffer platform is horizontally slidably mounted on the upper end of the mounting base. Multiple follower rods are provided on the buffer platform. The follower rods are pushed by the hot-rolled plate to generate independent horizontal displacement. A composite piston rod is provided at the bottom of each follower rod. One end of the composite piston rod is connected to an energy storage cylinder on one side of the mounting base, and the other end is connected to an excitation cylinder on the buffer platform. The buffer platform is provided with multiple sliding grooves in the middle. The follower rod and the sliding grooves are in sliding fit. A spring buffer block is installed on one side of the inner wall of the sliding groove. The spring buffer block moves synchronously with the follower rod as it moves laterally until the spring buffer block contacts the sliding groove to form a mechanical limit. The energy storage cylinder is connected to the mounting base. The input end of the energy storage cylinder is connected to the buffer platform, and the output end is provided as multiple connecting pipes. Each connecting pipe has a dynamically sealed composite piston rod. The other end of the composite piston rod passes through the buffer platform and the follower rod in sequence and forms a sliding fit with the hollow piston column. Each hollow piston column forms a dynamically sealed fit with the connecting pipe of the excitation cylinder. Adjacent hollow piston columns are fixedly connected to each other. The output end of the excitation cylinder drives the displacement of the internal cutting adjustment mechanism of the cross-cutting machine through the push rod oil pipe to realize the change of the cutting position of the cross-cutting machine.

[0005] Preferably, the roller conveyor is equipped with a hydraulic lifting platform, on which a mounting base is driven to realize the lifting function of the base in the vertical direction. A feeding sensor is set on the side away from the hydraulic lifting platform. The feeding sensor and the hydraulic lifting platform are electrically connected. When material is detected, the feeding sensor drives the hydraulic lifting platform to perform lifting action through an external control unit.

[0006] Preferably, the top two sides of the mounting base are symmetrically provided with limiting protrusions, and a buffer platform is slidably installed on the limiting protrusions. Multiple sliding grooves are opened at the upper end of the buffer platform, and a follower rod is slidably fitted in the sliding groove. A contact rod is rotatably installed at the top of each follower rod, and a torsion spring is installed at the rotatable connection between the contact rod and the follower rod. A cutting table is arranged between adjacent follower rods, and the cutting table is installed on the buffer platform to form a cutting cooperation with the cross-cutting mechanism.

[0007] Preferably, the composite piston rod is installed inside the slide groove and passes through the bottom of the follower rod. Both ends of the composite piston rod are provided with piston assemblies. One end of the rod body forms a sliding seal with the connecting pipe of the energy storage cylinder and the other end forms a sliding seal with the connecting pipe of the excitation cylinder.

[0008] Preferably, the mounting base has multiple slots on the side facing the energy storage cylinder, and a wedge-shaped reset block is installed in the slot. The tip of the wedge-shaped reset block protrudes upward from the mounting base and abuts against the middle part of the composite piston rod, thereby restricting the displacement of the composite piston rod in its natural state. A platform is provided at the joint between the composite piston rod and the wedge-shaped reset block.

[0009] Preferably, a protrusion is installed in the middle of the side of the buffer platform facing the energy storage cylinder, and a pair of compression rods are installed on the protrusion. The compression rods and the input pipe in the middle of the energy storage cylinder form a dynamic sealing fit.

[0010] Preferably, the excitation cylinder is installed on one side of the upper part of the buffer platform, and the input end of the excitation cylinder is provided with multiple connecting pipes II. A hollow piston column is dynamically sealed and installed inside the connecting pipe II. The hollow piston column is hollow inside and forms a sliding fit with the composite piston rod.

[0011] Preferably, the output end of the composite piston rod is connected to the input end of the push rod inside the cross-cutting machine via a push rod oil pipe. The push rod is installed on both sides inside the cross-cutting machine, and the output end of the push rod drives the installation of a guide frame. The guide frame is limited and horizontally slidably installed in a slot opened inside the cross-cutting machine.

[0012] Preferably, the cross-cutting machine is provided with a drive seat in the middle, and a floating blade holder is slidably mounted on the bottom of the drive seat through a limiting guide rail. Guide columns are symmetrically mounted at both ends of the floating blade holder, and the guide columns are slidably engaged with the guide frames set on both sides inside the cross-cutting machine.

[0013] Preferably, the guide frame has a guide groove in the middle, which is used to connect with the guide column. The guide groove includes an inclined top guide section and a vertical middle guide section.

[0014] The beneficial effects of this invention are as follows: In this invention, multiple follower rods set in the middle of the roller conveyor can sense and adhere to the end of the sheet material. This, in turn, links the internal composite piston rod and hydraulic mechanism to identify the follower rod at the most concave position and drive the cross-cutting machine to change the blade position. This mechanical contact structure avoids the influence of environmental interference and inertial vibration on positioning, ensuring that irregular end defects can be stably and accurately removed even under harsh working conditions, while also guaranteeing cutting efficiency. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the external structure of a cutting device for hot-rolled plate production proposed in this invention; Figure 2 This is a schematic diagram of the roller conveyor structure proposed in this invention; Figure 3 This is a schematic diagram of the hydraulic lifting platform installation structure proposed in this invention. Figure 1 ; Figure 4 This is a schematic diagram of the hydraulic lifting platform installation structure proposed in this invention. Figure 2 ; Figure 5 This is an exploded view of the mounting structure of the mounting base proposed in this invention; Figure 6 This is a schematic diagram of the structure at point A proposed in this invention; Figure 7 This is a schematic diagram of the connecting rod mounting structure proposed in this invention; Figure 8 This is a partially enlarged schematic diagram of the connecting rod mounting structure proposed in this invention; Figure 9 This is a schematic diagram of the energy storage cylinder installation structure proposed in this invention; Figure 10 This is a schematic diagram of the external structure of the energy storage cylinder proposed in this invention; Figure 11 This is a schematic diagram of the internal structure of the energy storage cylinder proposed in this invention; Figure 12 This is a schematic diagram of the installation structure of the excitation cylinder proposed in this invention; Figure 13 This is a schematic diagram of the external structure of the cross-cutting machine proposed in this invention; Figure 14 This is a schematic diagram of the guide frame installation structure proposed in this invention.

[0016] In the diagram: 1. Roller conveyor; 2. Cross-cutting machine; 21. Drive seat; 22. Floating knife holder; 23. Guide column; 24. Limiting guide rail one; 3. Follower rod; 31. Contact rod; 4. Feed sensor; 5. Push rod oil pipe; 6. Cutting table; 7. Hydraulic lifting platform; 8. Mounting seat; 81. Limiting convex rail; 9. Buffer platform; 91. convex frame; 92. Compression rod; 10. Energy storage cylinder; 101. Energy storage device; 102. Connecting pipe one; 103. Input pipe; 11. Compound piston rod; 12. Excitation cylinder; 13. Spring buffer block; 14. Slide groove; 15. Limiting block; 16. Wedge-shaped reset block; 17. Hollow piston column; 18. Push rod; 19. Guide frame; 20. Connecting pipe two. Detailed Implementation

[0017] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0018] Reference Figure 1-5 A cutting device for hot-rolled plate production includes a roller conveyor 1, with a cross-cutting machine 2 arranged across the middle of the roller conveyor 1 for cutting the hot-rolled plate conveyed by the roller conveyor 1. A hydraulic lifting platform 7 is provided in the middle of the roller conveyor 1, and a mounting seat 8 is driven on the hydraulic lifting platform 7 to realize the lifting function of the mounting seat 8 in the vertical direction.

[0019] Among them, the top two sides of the mounting base 8 are symmetrically provided with limiting convex rails 81, and the limiting convex rails 81 are slidably mounted with a buffer platform 9, so that the buffer platform 9 can slide horizontally along the conveying direction of the roller table 1. Furthermore, multiple follower rods 3 are installed at the upper end of the buffer platform 9, and a contact rod 31 is rotatably installed at the top of the follower rod 3. A torsion spring is installed at the rotatable connection between the contact rod 31 and the follower rod 3. In its natural state, the torsion spring drives the contact rod 31 and the follower rod 3 to overlap in the top view through pre-tightening force. The contact rod 31 is used to directly contact the end of the hot-rolled plate and undergo displacement under force. The rotating connection groove between the contact rod and the follower rod is provided with limiting mechanisms on both sides to limit the rotation angle of the contact rod to 45° to the left and right until it rotates into a mechanical support.

[0020] Multiple cutting tables 6 are arranged between adjacent follower rods 3 and installed on buffer tables 9 to provide support during cutting operations.

[0021] Furthermore, multiple composite piston rods 11 are installed in the middle of the buffer platform 9. Each composite piston rod 11 is installed in each slide groove 14 and passes through the bottom of the follower rod 3. Both ends of the composite piston rod 11 are provided with piston assemblies. One end of the rod is connected to the energy storage cylinder 10 installed on one side of the mounting base 8, and the other end is connected to the excitation cylinder 12 installed on the other side of the buffer platform 9.

[0022] Furthermore, a feed sensor 4 is configured on one side of the roller conveyor 1. The feed sensor 4 is used to detect the feeding status of the material. The feed sensor 4 is electrically connected with the hydraulic lifting platform 7. When the feeding of material is detected, the feed sensor 4 drives the hydraulic lifting platform 7 to perform lifting action through the external control unit. The specific model of the feed sensor 4 is determined by those skilled in the art based on the actual production situation. The connection method and excitation logic of the sensor and the external control components are common knowledge to those skilled in the art, and therefore will not be explained further.

[0023] Reference Figure 5-12 The mounting base 8 has multiple slots on the side facing the accumulator cylinder 10. Each slot corresponds to the position of each follower rod 3. A wedge-shaped reset block 16 is installed in the slot. The tip of the wedge-shaped reset block 16 protrudes upward from the mounting base 8 and abuts against the middle part of the composite piston rod 11, thereby limiting the displacement of the composite piston rod 11 in its natural state. A platform is provided at the joint between the composite piston rod 11 and the wedge-shaped reset block 16. The wedge-shaped reset block 16 includes a wedge-shaped block and a spring assembly installed in the slot. The spring assembly is used to connect the bottom of the slot and the wedge-shaped block. The wedge-shaped block is vertically limited and slidably installed in the slot, and the reset movement is achieved through the spring assembly.

[0024] Furthermore, a groove 14 is provided in the middle of the buffer platform 9. The bottom end of the follower rod 3 is slidably installed in the groove 14, and a through hole is provided in the middle of the bottom end of the follower rod 3. A composite piston rod 11 is inserted through the through hole. A spring buffer block 13 is installed on one inner wall of the groove 14. The spring buffer block 13 includes a buffer block and a spring assembly. When the follower rod 3 is displaced in the groove 14, the initial energy dissipation buffer is achieved by squeezing the spring buffer block 13.

[0025] The composite piston rod 11 passes through the follower rod 3 and the spring buffer block 13 and extends to the outside of the buffer platform 9 at both ends. A limit block 15 is provided in the middle of the composite piston rod 11 to constrain the displacement range.

[0026] Furthermore, one end of the composite piston rod 11 forms a dynamic sealing fit with the connecting pipe 102 on the side of the accumulator cylinder 10. The accumulator cylinder 10 is filled with hydraulic oil and equipped with an accumulator 101. Correspondingly, a wedge-shaped reset block 16 is arranged diagonally below each connecting pipe 102. In addition, a bracket 91 is installed in the middle of the side of the buffer platform 9 facing the energy storage cylinder 10. A pair of compression rods 92 are installed on the bracket 91. A pair of input pipes 103 are correspondingly provided in the middle of the energy storage cylinder 10 for docking and cooperating with the compression rods 92. Multiple connecting pipes 102 are provided on both sides away from the input pipes 103.

[0027] When the buffer platform 9 undergoes horizontal linear displacement on the mounting base 8, the compression rod 92 simultaneously enters the input pipe 103 to compress the oil, and stores energy through the accumulator 101.

[0028] Furthermore, the other end of each composite piston rod 11 is mated with the connecting pipe 20 installed on the side of the excitation cylinder 12. A hollow piston column 17 is dynamically sealed inside each connecting pipe 20. The hollow piston column 17 is hollow inside and the composite piston rod 11 passes through it to form a sliding connection. The composite piston rod 11 has a movement gap in the hollow space inside the hollow piston column 17. Adjacent hollow piston columns 17 are rigidly connected by connecting rods. The outer wall of the connecting pipe 20 is provided with a moving slot that allows the connecting rod to extend, so that the displacement of each set of composite piston rods 11 can be converted into pressure output in the excitation cylinder 12.

[0029] Reference Figure 13-14 The cross-cutting machine 2 is equipped with a drive seat 21 in the middle. The drive seat 21 is used to perform cross-cutting drive operation. A floating knife seat 22 is slidably installed at the bottom of the drive seat 21 through a limit guide rail 24. Guide columns 23 are symmetrically installed at both ends of the floating knife seat 22. The guide columns 23 and the guide frames 19 set on both sides inside the cross-cutting machine 2 form a sliding fit. The guide frame 19 can be horizontally slidably installed in the slots opened on both sides inside the cross-cutting machine 2. The bottom of the guide frame 19 is driven to the output end of the push rod 18. The input end of the push rod 18 is connected to the output end of the excitation cylinder 12 through the push rod oil pipe 5. A guide groove is opened in the middle of the guide frame 19. The guide groove includes an inclined top guide section and a vertical middle guide section. When the push rod 18 drives the guide frame 19 to move horizontally, the inclined surface of the guide groove drives the guide column 23 to drive the floating cutter holder 22 to find its horizontal position, thereby forming different cutter placement positions.

[0030] In this embodiment, the hot-rolled plate to be processed is conveyed along the roller conveyor 1. When the hot-rolled plate approaches the area of ​​the cross-cutting machine 2, the feed sensor 4 located on one side of the roller conveyor 1 senses the material signal. Subsequently, the external control unit drives the hydraulic lifting platform 7 to perform an upward lifting action according to the signal, which drives the mounting base 8 and the follower rod 3 to be in place as a whole, so that the vertical height of the contact rod 31 is aligned with the end of the hot-rolled plate.

[0031] As the hot-rolled plate continues to advance and comes into contact with the contact rod 31, the contact rod 31, under the action of contact stress, overcomes the preload of the internal torsion spring and rotates adaptively to address the irregular geometric structures such as skewing, curvature, or fishtail shape at the end of the hot-rolled plate. This allows the distribution pattern of the contact rod 31 to fit the contour of the end face of the hot-rolled plate. Subsequently, driven by the forward impulse energy of the hot-rolled plate, each follower rod 3 moves along the corresponding slide groove 14 and simultaneously compresses the spring buffer block 13 set in the slide groove 14, achieving initial dissipation of the impact energy of the plate and shape fitting. Since the shape of the plate is fixed, the multiple follower rods 3 can maintain synchronous and shape-fitting displacement. At the same time, under the action of the spring buffer block 13, it can be ensured that the follower rods 3 and the plate are always in contact.

[0032] During this process, due to the protrusions and depressions on the end face of the hot-rolled plate, the displacement of each follower rod 3 is not consistent. Each follower rod 3 moves together within the slide groove 14, and only the follower rod 3 that contacts the most protruding part of the plate end first compresses the corresponding spring buffer block 13 to the limit to form a rigid support. At this time, the remaining kinetic energy of the hot-rolled plate is transferred to the buffer platform 9, driving the buffer platform 9 to make a horizontal linear displacement along the limiting convex rail 81 on the mounting base 8.

[0033] As the buffer platform 9 moves, the compression rod 92, mounted on the protrusion 91 on one side, simultaneously penetrates into the input pipe 103 of the accumulator cylinder 10 to compress the oil. The resulting hydraulic energy is partially stored in the accumulator 101. Simultaneously, the hot-rolled plate stops transporting normally. The spring buffer block 13 and the accumulator cylinder 10 achieve effective buffering and dissipation. At this time, the wedge-shaped reset block 16, located in the slot of the mounting base 8, moves and is pressed down to overcome the spring pressure, causing its tip to disengage from the bottom step lock in the middle of the composite piston rod 11, thereby releasing the displacement restriction on the composite piston rod 11.

[0034] At this time, driven by the oil pressure inside the accumulator cylinder 10, multiple sets of composite piston rods 11 are displaced axially. Since the composite piston rod 11 passes through the through hole at the bottom of the follower rod 3, its movement will not interfere with the position maintenance of the follower rod 3. The limiting block 15 in the middle of the rod will move accordingly and eventually abut against the follower rods 3 in different positions. Since the horizontal position of the follower rod 3 maps the degree of concavity at the plate end, the stroke of the composite piston rod 11 is mechanically limited by each follower rod 3. The composite piston rod 11 corresponding to the follower rod 3 at the most concave position at the plate end has the largest stroke.

[0035] Next, the other end of the compound piston rod 11 extends and retracts within the connecting pipe 20 on the side of the excitation cylinder 12. Inside the connecting pipe 20, each compound piston rod 11 passes through the hollow piston column 17 and forms a sliding fit. Since the adjacent hollow piston columns 17 are rigidly interlocked by the connecting rod, the compound piston rod 11 with the largest stroke will push the corresponding hollow piston column 17 first, while the remaining compound piston rods 11 will slide freely in the internal space of the hollow piston column 17 and drive the entire hollow piston column to move synchronously.

[0036] The pressure oil output by the activating cylinder 12 is transported to the inside of the cross-cutting machine 2 through the push rod oil pipe 5, driving the push rod 18 to extend, thereby causing the guide frame 19 to slide horizontally in the slots on both sides of the cross-cutting machine 2. Subsequently, the cross-cutting machine 2 drives the drive seat 21 to move downward, causing the floating knife holder 22 to form a sliding engagement with the moved guide frame 19, and performing a drop cut to remove the fishtail defect at the end of the hot-rolled plate, with the cutting table 6 below providing shearing support.

[0037] Then, the roller conveyor 1 continues to transport the hot-rolled plate forward, the hydraulic lifting platform 7 resets, and the follower rod 3 and the buffer platform 9 reset themselves under the reset action of the hydraulic system.

[0038] Specifically, push rod 18 is a single-acting hydraulic cylinder.

[0039] It should be noted that the inner diameter of the input pipe 103 in the middle of the accumulator cylinder 10 is larger than the inner diameter of the side connecting pipe 102. Based on the hydraulic transmission principle, the difference in the area ratio between the larger effective cross-sectional area of ​​the input pipe 103 and the smaller cross-sectional area of ​​the connecting pipe 102 linearly converts the shorter horizontal displacement generated by the buffer platform 9 into a longer axial displacement of the composite piston rod 11 within the connecting pipe 102.

[0040] Therefore, compared to traditional methods that use optical sensors in conjunction with guillotine cutting, which are susceptible to interference in high-temperature and heavy water mist environments and have difficulty buffering the inertia of steel plate movement to reduce identification errors, this mechanism uses follower rod 3 for mechanical contact to fit the fishtail defect at the plate end, and links the internal composite piston rod and hydraulic mechanism to identify the follower rod 3 at the most concave position and change the cutting position of the cross-cutting machine 2. This type of mechanical contact structure can effectively avoid the impact of environmental interference and inertial vibration on positioning accuracy, ensuring that irregular end defects can be stably and accurately removed even under harsh working conditions, while also guaranteeing cutting efficiency.

[0041] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A cutting device for hot-rolled plate production, comprising a roller conveyor (1), characterized in that, A cross-cutting machine (2) is configured in the middle of the roller conveyor (1). An installation seat (8) is hydraulically lifted inside the roller conveyor (1). A buffer platform (9) is horizontally slidably installed on the upper end of the installation seat (8). Multiple follower rods (3) are provided on the buffer platform (9). The follower rods (3) are pushed by the hot-rolled plate to generate independent horizontal displacement. A composite piston rod (11) is provided at the bottom of each follower rod (3). One end of the composite piston rod (11) is connected to the energy storage cylinder (10) on one side of the installation seat (8), and the other end is connected to the excitation cylinder (12) on the buffer platform (9). The buffer platform (9) is provided with multiple sliding grooves (14) in the middle. The follower rod (3) and the sliding groove (14) form a sliding fit. A spring buffer block (13) is installed on one side of the inner wall of the sliding groove (14). The spring buffer block (13) moves synchronously with the follower rod (3) until the spring buffer block (13) contacts the sliding groove (14) to form a mechanical limit. The energy storage cylinder (10) is connected to the mounting base (8). The input end of the energy storage cylinder (10) is connected to the buffer platform (9), and the output end is set as multiple connecting pipes (102). Each connecting pipe (102) is dynamically sealed with a composite piston rod (11). The other end of the composite piston rod (11) passes through the buffer platform (9) and the follower rod (3) in sequence and forms a sliding fit with the hollow piston column (17). Each hollow piston column (17) forms a dynamic sealing fit with the connecting pipe (20) of the excitation cylinder (12). Adjacent hollow piston columns (17) are fixedly connected to each other. The output end of the excitation cylinder (12) drives the displacement of the internal cutting adjustment mechanism of the cross-cutting machine (2) through the push rod oil pipe (5) to realize the change of the cutting position of the cross-cutting machine (2).

2. The cutting device for hot-rolled plate production according to claim 1, characterized in that, The roller conveyor (1) is equipped with a hydraulic lifting platform (7). The hydraulic lifting platform (7) is driven to install a mounting base (8) to realize the lifting function of the base in the vertical direction. A feeding sensor (4) is set on the side away from the hydraulic lifting platform (7). The feeding sensor (4) and the hydraulic lifting platform (7) are electrically connected. When material is detected, the feeding sensor (4) drives the hydraulic lifting platform (7) to perform lifting action through the external control unit.

3. The cutting device for hot-rolled plate production according to claim 1, characterized in that, The mounting base (8) is symmetrically provided with limiting protrusions (81) on both sides of the top. A buffer platform (9) is slidably installed on the limiting protrusions (81). Multiple sliding grooves (14) are opened at the upper end of the buffer platform (9). A follower rod (3) is slidably fitted in the sliding groove (14). A contact rod (31) is rotatably installed at the top of each follower rod (3). A torsion spring is installed at the rotatable connection between the contact rod (31) and the follower rod (3). A cutting table (6) is arranged between adjacent follower rods (3). The cutting table (6) is installed on the buffer platform (9) to form a cutting cooperation with the cross-cutting machine (2).

4. The cutting device for hot-rolled plate production according to claim 1, characterized in that, The composite piston rod (11) is installed inside the slide groove (14) and passes through the bottom of the follower rod (3). Both ends of the composite piston rod (11) are provided with piston assemblies. One end of the rod body forms a sliding seal with the connecting pipe one (102) of the energy storage cylinder (10), and the other end forms a sliding seal with the connecting pipe two (20) of the excitation cylinder (12).

5. A cutting device for hot-rolled plate production according to claim 1, characterized in that, The mounting base (8) has multiple slots on the side facing the energy storage cylinder (10). A wedge-shaped reset block (16) is installed in the slot. The tip of the wedge-shaped reset block (16) protrudes upward from the mounting base (8) and abuts against the middle rod of the composite piston rod (11), thereby restricting the displacement of the composite piston rod (11) in its natural state. A platform is provided at the joint between the composite piston rod (11) and the wedge-shaped reset block (16).

6. A cutting device for hot-rolled plate production according to claim 1, characterized in that, The buffer platform (9) has a protrusion (91) installed in the middle of the side facing the energy storage cylinder (10). A pair of compression rods (92) are installed on the protrusion (91). The compression rods (92) and the input pipe (103) in the middle of the energy storage cylinder (10) form a dynamic sealing fit.

7. A cutting device for hot-rolled plate production according to claim 1, characterized in that, The excitation cylinder (12) is installed on one side of the upper part of the buffer platform (9). The input end of the excitation cylinder (12) is provided with multiple connecting pipes (20). A hollow piston column (17) is dynamically sealed and installed inside the connecting pipe (20). The hollow piston column (17) is hollow inside and forms a sliding fit with the composite piston rod (11).

8. A cutting device for hot-rolled plate production according to claim 7, characterized in that, The output end of the composite piston rod (11) is connected to the input end of the push rod (18) inside the cross-cutting machine (2) through the push rod oil pipe (5). The push rod (18) is installed on both sides inside the cross-cutting machine (2). The output end of the push rod (18) drives the installation of the guide frame (19). The guide frame (19) is limited to horizontal sliding in the slot opened inside the cross-cutting machine (2).

9. A cutting device for hot-rolled plate production according to claim 8, characterized in that, The cross-cutting machine (2) is equipped with a drive seat (21) in the middle. A floating knife seat (22) is slidably installed at the bottom of the drive seat (21) through a limiting guide rail (24). Guide columns (23) are symmetrically installed at both ends of the floating knife seat (22). The guide columns (23) and the guide frames (19) set on both sides inside the cross-cutting machine (2) form a sliding fit.

10. A cutting device for hot-rolled plate production according to claim 9, characterized in that, The guide frame (19) has a guide groove in the middle, which is used to connect with the guide column (23). The guide groove includes an inclined top guide section and a vertical middle guide section.

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