High-precision flying shear

Abstract

The invention discloses a high-precision flying shear, which belongs to the field of metal cutting, and comprises a portal frame, and a pinch roll is rotatably arranged on the portal frame; a first rotating roller and a second rotating roller are rotationally mounted on the portal frame, and cutters are mounted on the outer walls of the first rotating roller and the second rotating roller; a driving mechanism for driving the first rotating roller and the second rotating roller to rotate is arranged on the portal frame; two mounting frames are symmetrically arranged on the inner side wall of the portal frame; in the process that the pinch roll drives the plate to move, under the action of friction force, the heat dissipation plate moves along with the to-be-sheared plate, in the process that the heat dissipation plate moves along with the plate, the turbulent flow mechanism drives air around the heat dissipation holes to flow, the flow speed of the air around the heat dissipation holes is increased, and therefore the to-be-sheared part can be cooled; the temperature difference between the to-be-sheared part and the cutter is reduced, the thermal-mechanical coupling effect is relieved, the probability of uneven deformation in the shearing process is reduced, the probability of generation of wave-shaped edge defects is obviously reduced, and therefore the shearing quality is improved.

Description

Technical Field

[0001] The present invention relates to the field of metal cutting, and more specifically, to a high-precision flying shear. Background Art

[0002] A flying shear is a type of shearing machine that laterally shears a moving rolled piece. Flying shears are mainly used to shear medium and small steel billets, thin slab billets, small-sized steel sections (bars), as well as hot-rolled and cold-rolled strip steel, and are also used to cut up the plate edges sheared by a circular shear.

[0003] During the operation of a flying shear, tool thermal management is a key factor in extending the service life and ensuring the shearing quality. When shearing hot-rolled steel plates, significant thermodynamic responses will occur at the contact interface between the tool and the high-temperature material: the temperature gradient at the moment of contact exceeds 500 °C / s, and the thermo-mechanical coupling effect causes non-uniform deformation in the shearing zone, forming wavy edge defects, that is, cut deformation, resulting in poor quality of the sheared finished product.

[0004] Therefore, a high-precision flying shear is proposed. Summary of the Invention

[0005] Aiming at the problems existing in the prior art, the purpose of the present invention is to provide a high-precision flying shear, which can reduce the temperature difference between the tool and the hot-rolled steel plate while ensuring heat dissipation of the tool, and reduce the probability of wavy edge defects appearing at the cut.

[0006] To solve the above problems, the present invention adopts the following technical solutions.

[0007] A high-precision flying shear includes a gantry, and pinch rolls are rotatably provided on the gantry;

[0008] A first rotating roll and a second rotating roll are rotatably installed on the gantry, and tools are installed on the outer walls of the first rotating roll and the second rotating roll; a driving mechanism for driving the first rotating roll and the second rotating roll to rotate is provided on the gantry;

[0009] Two mounting brackets are symmetrically provided on the inner side wall of the gantry; mounting rods are vertically and slidably inserted on the mounting brackets, heat dissipation plates are movably provided at the adjacent ends of the two mounting rods, and a clamping mechanism for driving the two heat dissipation plates to approach each other is provided on the gantry;

[0010] A chute is formed on the end face of the heat dissipation plate close to the corresponding mounting rod, the longitudinal section of the chute is "convex" shaped, and a first slider matching the chute is slidably installed in the chute; the mounting rod is fixedly connected to the corresponding first slider; a spring is commonly installed between the side wall of the chute away from the pinch roll and the first slider, heat dissipation holes penetrating through the corresponding heat dissipation plates are formed on the side walls of the adjacent sides of the two chutes, and a flow disturbing mechanism for increasing the air flow rate around the heat dissipation holes is provided on the heat dissipation plate.

[0011] Further, the driving mechanism includes a first driving gear and a first driven gear respectively and fixedly sleeved on the first rotating roller and the second rotating roller. The first driving gear meshes with the first driven gear, and a stepping motor with an output end fixedly connected to the rotating shaft of the first driving gear is fixedly installed on the gantry.

[0012] Further, the clamping mechanism includes an elastic member sleeved on the mounting rod, and two ends of the elastic member are respectively fixedly connected to the corresponding mounting rod and the mounting frame; two discs are symmetrically and rotatably installed on the side wall of the gantry, and a first driving magnet is fixedly installed on the side wall of the disc. The two discs are symmetrically distributed on the upper and lower sides of the two mounting rods; and a linkage mechanism for synchronously rotating the discs with the first rotating roller and the second rotating roller is provided on the gantry.

[0013] A driven magnet is fixedly installed at one end of each mounting rod away from the heat dissipation plate, and the adjacent ends of the adjacent first driving magnet and the driven magnet have the same magnetic poles.

[0014] Further, the flow disturbing mechanism includes a metal air bag fixedly installed between the side wall of the chute close to the pinch roller and the first slider, and exhaust holes are uniformly formed in the side wall of the metal air bag close to the heat dissipation holes.

[0015] Further, the linkage mechanism includes a second driving gear and a second driven gear respectively fixedly installed on the rotating shafts of the two discs; and the second driving gear meshes with the second driven gear.

[0016] Sprockets are fixedly sleeved on the rotating shafts of the first driven gear and the second driven gear, and a chain is jointly sleeved between the two sprockets.

[0017] Further, a threaded rod is horizontally installed on the side wall of the chute away from the pinch roller, and the threaded rod penetrates through the side wall of the chute away from the pinch roller.

[0018] Further, a cavity is formed in the elastic member, and a hole communicating with the outside is formed in the bottom wall of the cavity.

[0019] Further, a guiding cavity is formed in the disc located above the plane where the second rotating roller is located. The guiding cavity and the first driving magnet are on the same diameter of the disc, and a movable magnet is slidably installed in the guiding cavity.

[0020] One end of the movable magnet close to the contact surface of the first driving magnet and the disc is the south pole.

[0021] One end of the driven magnet away from the heat dissipation plate is the south pole, and the attraction between the movable magnet and the first driving magnet is less than the gravity of the movable magnet itself.

[0022] Further, anti-slip lines are uniformly formed on the bottom wall of the heat dissipation plate.

[0023] Furthermore, a heat insulation cover is sleeved outside the driven magnet.

[0024] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0025] (1) Through the mutual cooperation of the heat dissipation plate, heat dissipation holes, mounting rods and clamping mechanisms, during the process of the clamping roller driving the sheet to move, under the action of friction, the heat dissipation plate moves together with the sheet to be sheared. During the process of the heat dissipation plate moving with the sheet, the flow guiding mechanism drives the air flow around the heat dissipation holes, accelerating the air flow velocity around the heat dissipation holes, so as to be able to cool the part to be sheared, reduce the temperature difference between the part to be sheared and the tool, reduce the thermo-mechanical coupling effect, reduce the probability of uneven deformation during the shearing process, and significantly reduce the probability of the generation of wavy edge defects, thereby improving the shearing quality.

[0026] (2) With the cooperation of the clamping mechanism, threaded rod and heat dissipation plate, when installing the equipment, select a suitable spring to adjust the initial position of the heat dissipation plate, so that the next part to be sheared can be clamped by the heat dissipation plate during the tool shearing process, improving the stability during the movement of the sheet, and further preventing the sheet from shaking during the shearing process, playing a role in improving the flatness of the cut.

[0027] (3) Through the mutual cooperation of the guiding cavity and the movable magnet, the pressure between the heat dissipation plate and the sheet can be increased, thereby increasing the friction force to ensure that the heat dissipation plate can move with the sheet. At the same time, during the rotation of the guiding cavity, under the action of the small holes, the guiding cavity can exhaust air outwards. The gas discharged from these small holes impacts the surface of the heat dissipation plate, accelerating the air flow velocity on the surface of the heat dissipation plate, improving the cooling effect on the heat dissipation plate and the part to be sheared of the sheet; at the same time, the guiding cavity can inhale low-temperature gas through the small holes away from the sheet, further improving the cooling effect on the heat dissipation plate. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 is the first three-dimensional structure schematic diagram of the present invention;

[0029] Figure 2 is the second three-dimensional structure schematic diagram of the present invention;

[0030] Figure 3 is the third three-dimensional structure schematic diagram of the present invention;

[0031] Figure 4 is the front cross-sectional structure schematic diagram of the present invention;

[0032] Figure 5 is of the present invention Figure 4 the enlarged structure schematic diagram at A in;

[0033] Figure 6 is the cross-sectional structure schematic diagram of the heat dissipation plate of the present invention;

[0034] Figure 7 Schematic diagram of the combined structure of the disc and the guiding cavity of the present invention;

[0035] Figure 8 Schematic diagram of the structure of the heat dissipation plate of the present invention.

[0036] Explanation of the reference numerals in the figure:

[0037] 1. Gantry; 2. Pinch rolls; 201. Upper roll; 202. Lower roll; 3. Hydraulic cylinder; 4. First motor; 5. First rotating roll; 6. Second rotating roll; 7. Tool; 8. Mounting frame; 9. Mounting rod; 10. Heat dissipation plate; 11. First slider; 12. Spring; 13. Heat dissipation holes; 14. First driving gear; 15. First driven gear; 16. Stepper motor; 17. Elastic member; 18. Disc; 19. First active magnet; 20. Driven magnet; 21. Metal airbag; 22. Exhaust holes; 23. Second driving gear; 24. Second driven gear; 25. Sprocket; 26. Chain; 27. Threaded rod; 28. Cavity; 29. Hole; 30. Guiding cavity; 31. Moving magnet; 32. Heat preservation cover; 33. Slide groove. Specific embodiments

[0038] The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention; obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0039] Embodiment 1:

[0040] Please refer to Figures 1 to 8 , a high-precision flying shear, including a gantry 1, and pinch rolls 2 are horizontally rotatably arranged on the gantry 1;

[0041] The pinch rolls 2 include an upper roll 201 and a lower roll 202 rotatably installed on the gantry 1. A hydraulic cylinder 3 is vertically and fixedly installed on the gantry 1. The output end of the hydraulic cylinder 3 is fixedly installed with a first motor 4, and the output end of the first motor 4 is fixedly connected to the rotating shaft of the upper roll 201; among them, the pinch rolls 2 are prior art and will not be described in detail;

[0042] A first rotating roller 5 and a second rotating roller 6 are horizontally rotatably mounted on the gantry 1. The first rotating roller 5 and the second rotating roller 6 are symmetrically distributed up and down, and the first rotating roller 5 is above the second rotating roller 6. A cutter 7 is horizontally detachably mounted on the outer walls of the first rotating roller 5 and the second rotating roller 6. The cutter 7 is parallel to the first rotating roller 5, and the cutter 7 is mounted on the outer walls of the corresponding first rotating roller 5 and the second rotating roller 6 through screw threads; a nozzle for cooling the cutter 7 is provided on the gantry 1, and the nozzle sprays low-temperature water mist to cool the cutter 7, which is a prior art and will not be described in detail;

[0043] The gantry 1 is provided with a driving mechanism for driving the first rotating roller 5 and the second rotating roller 6 to rotate;

[0044] Two mounting frames 8 are symmetrically fixedly installed on the inner wall of the gantry 1, and the two mounting frames 8 are symmetrically distributed up and down; and the mounting frame 8 located at the top is between the upper roller 201 and the first rotating roller 5; the mounting frame 8 located at the bottom is between the lower roller 202 and the second rotating roller 6; a mounting rod 9 is vertically slidably inserted on each mounting frame 8, and a heat sink 10 made of metal is movably provided at the adjacent ends of the two mounting rods 9, and a clamping mechanism for driving the two heat sinks 10 to approach each other is provided on the gantry 1; in the process of conveying the plate by the pinch roller 2, the clamping mechanism drives the two heat sinks 10 to approach each other, so that the heat sink 10 is clamped on the plate; a slide groove 33 is provided on the end surface of the heat sink 10 close to the corresponding mounting rod 9, and the longitudinal section of the slide groove 33 is a "convex" shape, and a "convex" shape cooperating with the slide groove 33 is slidably installed in the slide groove 33 The first slider 11 is convex, and since the first slider 11 and the slide groove 33 are both convex, the flanges on both sides of the first slider 11 and the grooves of the slide groove 33 form an axial sliding pair, forming a geometric constraint, so that the first slider 11 can only slide in the slide groove 33 and will not lose contact with the slide groove 33; the mounting rod 9 is fixedly connected to the corresponding first slider 11, so when the mounting rod 9 moves up and down, it can drive the heat sink 10 to move through the corresponding first slider 11; a spring 12 is installed between the side wall of the slide groove 33 away from the pinch roller 2 and the first slider 11, and the side walls of the adjacent sides of the two slide grooves 33 are provided with heat dissipation holes 13 that penetrate the corresponding heat dissipation plates 10, and the heat dissipation holes 13 are located on the surface of the part to be sheared, and the width of the heat dissipation holes 13 is 2 cm, and the heat dissipation plate 10 is provided with a spoiler mechanism for increasing the air flow rate around the heat dissipation holes 13.

[0045] The plate to be sheared is passed through the gap between the upper roller 201 and the lower roller 202, and then the upper roller 201 is driven downward by the output end of the hydraulic cylinder 3, so that the side walls of the adjacent sides of the upper roller 201 and the lower roller 202 are tightly fitted with the top wall and the bottom wall of the plate respectively, so that the plate can be moved by friction when the first motor 4 drives the upper roller 201 to rotate.

[0046] During the working process, the pinch rolls 2 drive the sheet to move into the gap between the first rotating roll 5 and the second rotating roll 6. As the driving mechanism drives the first rotating roll 5 and the second rotating roll 6 to perform circular motion, the cemented carbide cutting tool 7 installed on the surface of the first rotating roll 5 descends along a predetermined trajectory, and the cemented carbide cutting tool 7 installed on the surface of the second rotating roll 6 ascends along a predetermined trajectory. When the distance between the two cutting tools 7 is the smallest, the shearing of the sheet can be completed. Among them, driving the cutting tool 7 by the first rotating roll 5 and the second rotating roll 6 to shear the sheet is the prior art and will not be elaborated here.

[0047] When the pinch rolls 2 transport the to-be-sheared part of the sheet below the heat dissipation plates 10, under the action of the clamping mechanism, the two heat dissipation plates 10 approach each other and tightly clamp on the surface of the sheet, and the heat dissipation holes 13 cover the surface of the to-be-sheared part.

[0048] Since the mounting rod 9 is fixed in the horizontal direction and the first slider 11 is slidably installed in the chute 33, under the action of the spring 12, the end of the chute 33 close to the cutting tool 7 is pulled by the spring 12 and is in a state close to the first slider 11.

[0049] During the process of the pinch rolls 2 driving the sheet to move, under the action of friction, the heat dissipation plates 10 move together with the to-be-sheared sheet, so as to ensure that the heat dissipation holes 13 are always located on the surface of the to-be-sheared part, and at the same time the spring 12 is stretched.

[0050] During the process of the heat dissipation plates 10 moving with the sheet, the flow disturbing mechanism drives the air around the heat dissipation holes 13 to flow, accelerating the air flow rate around the heat dissipation holes 13, so as to be able to cool the to-be-sheared part and reduce the temperature difference between the to-be-sheared part and the cutting tool 7.

[0051] Therefore, during shearing, the thermo-mechanical coupling effect is reduced, the probability of uneven deformation phenomenon occurring during the shearing process is reduced, the generation probability of wavy edge defects is significantly decreased, and thus the shearing quality is improved.

[0052] Such as Figure 2 、 Figure 4 As shown, the driving mechanism includes a first driving gear 14 and a first driven gear 15 respectively fixedly sleeved on the first rotating roll 5 and the second rotating roll 6. The first driving gear 14 and the first driven gear 15 are meshed with each other, and a stepping motor 16 with an output end fixedly connected to the rotating shaft of the first driving gear 14 is fixedly installed on the gantry 1.

[0053] Among them, the rotation speed of the stepping motor 16 can be controlled by a program, which is the prior art and will not be elaborated here.

[0054] During operation, the stepping motor 16 drives the meshing first driving gear 14 and first driven gear 15 to rotate, thereby driving the first rotating roller 5 and the second rotating roller 6 to rotate simultaneously, and the rotating directions of the first rotating roller 5 and the second rotating roller 6 are opposite.

[0055] As Figure 5 shown, the clamping mechanism includes an elastic member 17 sleeved on the mounting rod 9, and both ends of the elastic member 17 are fixedly connected to the corresponding mounting rod 9 and the mounting frame 8 respectively; two discs 18 are symmetrically and rotatably mounted on the side wall of the gantry 1, and a first active magnet 19 is fixedly mounted on the side wall of the disc 18. The disc 18 drives the corresponding first active magnet 19 to perform a circular motion. The two discs 18 are symmetrically distributed on the upper and lower sides of the two mounting rods 9; and a linkage mechanism is provided on the gantry 1 to synchronously rotate the disc 18 with the first rotating roller 5 and the second rotating roller 6;

[0056] A driven magnet 20 is fixedly mounted at one end of each mounting rod 9 away from the heat dissipation plate 10. The adjacent poles of the adjacent first active magnet 19 and the driven magnet 20 are the same. Therefore, when the first active magnet 19 performing a circular motion approaches the corresponding driven magnet 20, and the angle between the line connecting the first active magnet 19 and the center of the disc 18 and the perpendicular line is between 0-5°, at an angle of 5°, the repulsive force is equal to the elastic force of the elastic member 17. As the angle decreases, the repulsive force between the first active magnet 19 and the driven magnet 20 gradually increases. The driven magnet 20 is subjected to the repulsive force and pushes the mounting rod 9 to move, so that the two heat dissipation plates 10 approach each other, and at the same time the elastic member 17 is stretched.

[0057] As the first active magnet 19 rotates, when the angle between the line connecting the first active magnet 19 and the center of the disc 18 and the perpendicular line is greater than 5°, the repulsive force received by the driven magnet 20 gradually decreases. At this time, the elastic member 17 gradually pulls the mounting rod 9 to reset, so that the heat dissipation plate 10 is separated from the plate. At this time, the spring 12 pulls the heat dissipation plate 10 to reset, preparing for the next operation.

[0058] As Figure 5 shown, the flow disturbing mechanism includes a metal airbag 21 fixedly installed between the side wall of the chute 33 close to the pinch roller 2 and the first slider 11. Exhaust holes 22 are evenly formed in the side wall of the metal airbag 21 close to the heat dissipation holes 13.

[0059] When the plate drives the heat dissipation plate 10 to move under the action of friction, the distance between the first slider 11 and the end of the first chute 33 close to the pinch roller 2 gradually decreases, forcing the metal airbag 21 to be compressed and contracted, and the gas inside it is discharged at high speed through the exhaust holes 22, forming a directional air flow to impact the surface of the plate covered by the heat dissipation holes 13. Therefore, the air flow velocity of the part to be sheared is greatly increased through forced convection, the amount of low-temperature air exchange is increased, and the heat dissipation performance of the area to be sheared is optimized.

[0060] When the spring 12 drives the heat dissipation plate 10 to reset, the metal airbag 21 is stretched. At this time, the metal airbag 21 inhales air through the exhaust hole 22 to prepare for working again.

[0061] As Figure 2 shown, the linkage mechanism includes a second driving gear 23 and a second driven gear 24 respectively and fixedly installed on the rotating shafts of two discs 18; and the second driving gear 23 is located above the second driven gear 24; and the second driving gear 23 meshes with the second driven gear 24; therefore, when the second driving gear 23 rotates, it can drive the second driven gear 24 to rotate synchronously and in the opposite direction;

[0062] Sprockets 25 are fixedly sleeved on the rotating shafts of the first driven gear 15 and the second driven gear 24, and a chain 26 is jointly sleeved between the two sprockets 25. Therefore, during the rotation of the first driven gear 15, the second driven gear 24 can be driven to rotate through the mutual cooperation of the sprockets 25 and the chain 26. That is, with the cooperation of the sprockets 25, the chain 26, the second driving gear 23 and the second driven gear 24, the disc 18 can be driven to rotate synchronously with the corresponding first rotating roller 5 and the second rotating roller 6.

[0063] As Figure 5 , Figure 6 shown, a threaded rod 27 is horizontally installed on the side wall of the chute 33 away from the pinch roller 2 in a threaded manner, and the threaded rod 27 penetrates through the side wall of the chute 33 away from the pinch roller 2.

[0064] By screwing the threaded rod 27, the length of the threaded rod 27 entering the chute 33 can be adjusted, thereby pushing the first slider 11 to move along the chute 33, and then adjusting the initial extension amount of the spring 12, achieving the effect of changing the initial position of the heat dissipation plate 10. Thus, during the shearing process of the cutter 7, the next part to be sheared can be clamped by the heat dissipation plate 10, improving the stability during the movement of the plate, and further preventing the plate from shaking during the shearing process, playing a role in improving the flatness of the cut.

[0065] As Figure 5 shown, a cavity 28 is formed in the elastic member 17, and a hole 29 communicating with the outside is formed in the bottom wall of the cavity 28.

[0066] When the heat dissipation plates 10 approach each other, the elastic member 17 is stretched, and at this time, the cavity 28 inhales air through the hole 29.

[0067] When the heat dissipation plate 10 contacts the high-temperature plate, the heat of the plate is transferred to the heat dissipation plate 10, and at this time, the temperature of the heat dissipation plate 10 rises.

[0068] During the process when the heat dissipation plate 10 is disengaged from contact with the plate material and gradually moves away from the plate material, the elastic member 17 gradually returns to its original state. At this time, the gas in the cavity 28 is discharged through the air holes, and the gas discharged from the air holes impacts the surface of the corresponding heat dissipation plate 10, thereby accelerating the air flow rate around the heat dissipation plate 10 and enabling the heat dissipation plate 10 to be cooled in a timely manner.

[0069] When the heat dissipation plate 10 comes into contact with the plate material again, the temperature difference between the heat dissipation plate 10 and the plate material is increased, which plays a role in ensuring that the heat of the plate material can be dissipated normally.

[0070] At the same time, when the heat dissipation plate 10 is disengaged from contact with the plate material, the spring 12 returns to its original state. At this time, the spring 12 pulls the heat dissipation plate 10 to move below the hole 29, thereby increasing the contact area between the low-temperature gas discharged from the hole 29 and the heat dissipation plate 10 and improving the cooling effect on the heat dissipation plate 10.

[0071] As Figure 7 shown, a guiding cavity 30 is formed in the disk 18 above the plane where the second rotating roller 6 is located. The guiding cavity 30 and the first active magnet 19 are located on the same diameter of the disk 18, and a movable magnet 31 is slidably installed in the guiding cavity 30;

[0072] One end of the movable magnet 31 close to the contact surface of the first active magnet 19 and the disk 18 is the south pole;

[0073] One end of the driven magnet 20 away from the heat dissipation plate 10 is the south pole, and the attractive force between the movable magnet 31 and the first active magnet 19 is less than the self-gravity of the movable magnet 31. Therefore, the movable magnet 31 slides freely in the guiding cavity 30 without being affected by the magnetic force of the active magnet.

[0074] When the active magnet approaches the driven magnet 20, the movable magnet 31 gradually slides to one end of the guiding cavity 30 close to the active magnet under the action of its own gravity. At this time, the magnetic fields generated by the active magnet and the movable magnet 31 are superimposed, increasing the repulsive force received by the driven magnet 20 and improving the clamping effect of the heat dissipation plate 10 on the plate material, which plays a role in ensuring that the heat dissipation plate 10 can move along with the plate material.

[0075] Then the disk 18 rotates. When the guiding cavity 30 rotates from the vertical state to the horizontal state, that is, when the movable magnet 31 and the active magnet are both in the same horizontal plane as the center of the disk 18, the movable magnet 31 is only affected by the attractive force of the active magnet.

[0076] Then the disk 18 continues to rotate and drives the active magnet and the movable magnet 31 to rotate above the plane where the center of the disk 18 is located. At this time, the movable magnet 31 slides along the inclined guiding cavity 30 to one end of the guiding cavity 30 away from the active magnet under the action of gravity.

[0077] Therefore, when the disk 18 drives the active magnet to move to the highest point, the guiding cavity 30 is in a vertical state. At this time, the movable magnet 31 is located at the bottom end of the guiding cavity 30. At this moment, the movable magnet 31 provides an attractive force for the driven magnet 20, accelerating the reset speed of the elastic member 17 and ensuring that the elastic member 17 can be reset in a timely manner.

[0078] Small holes communicating with the outside are provided at both ends of the guiding cavity 30, and the side wall of the movable magnet 31 is in contact with the side wall of the guiding cavity 30. Therefore, during the movement of the movable magnet 31, the guiding cavity 30 can be intermittently exhausted to the outside. Especially during the process of the guiding cavity 30 rotating from a horizontal state to a vertical state, the small hole located below exhausts air to the outside and impacts the heat dissipation plate 10, improving the cooling effect on the heat dissipation plate 10.

[0079] As Figure 8 shown, anti-slip patterns are evenly provided on the bottom wall of the heat dissipation plate 10.

[0080] By setting the anti-slip patterns, the friction force between the heat dissipation plate 10 and the sheet to be sheared is increased, thereby ensuring that the sheet can remain relatively stationary with respect to the heat dissipation plate 10; at the same time, the air flow channels formed by the anti-slip patterns improve the heat dissipation efficiency and enhance the heat dissipation effect.

[0081] As Figure 5 shown, a heat insulation cover 32 is sleeved outside the driven magnet 20. Since the temperature of the hot-rolled steel sheet is relatively high and the driven magnet 20 is close to the sheet for a long time, setting the heat insulation cover 32 can prevent the driven magnet 20 from being demagnetized by heat, ensuring the normal operation of the driven magnet 20.

[0082] The above is only a preferred specific embodiment of the present invention; however, the protection scope of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present invention, according to the technical solution of the present invention and its improved concept, makes equivalent substitutions or changes, and should be covered by the protection scope of the present invention.

Claims

1. A high-precision flying shear, comprising a gantry (1), wherein a pinch roller (2) is rotatably provided on the gantry (1); Features: A first rotating roller (5) and a second rotating roller (6) are rotatably mounted on the gantry (1), and a cutter (7) is mounted on the outer wall of each of the first rotating roller (5) and the second rotating roller (6); a driving mechanism for driving the first rotating roller (5) and the second rotating roller (6) to rotate is provided on the gantry (1); Two mounting frames (8) are symmetrically arranged on the inner side wall of the gantry (1); mounting rods (9) are vertically slidably inserted on the mounting frames (8); heat sinks (10) are movably arranged at adjacent ends of the two mounting rods (9); and a clamping mechanism for driving the two heat sinks (10) to approach each other is provided on the gantry (1); The heat sink (10) is provided with a slide groove (33) on the end surface close to one end of the corresponding mounting rod (9); the longitudinal section of the slide groove (33) is in the shape of a "convex" character; a first slider (11) cooperating with the slide groove (33) is slidably installed in the slide groove (33); the mounting rod (9) is fixedly connected to the corresponding first slider (11); a spring (12) is installed between the side wall of the slide groove (33) away from the clamping roller (2) and the first slider (11); the side walls of the two adjacent sides of the slide grooves (33) are provided with heat dissipation holes (13) penetrating the corresponding heat sink (10), and the heat sink (10) is provided with a spoiler mechanism for increasing the air flow rate around the heat dissipation holes (13).

2. A high-precision flying shear according to claim 1, characterized in that: The driving mechanism comprises a first driving gear (14) and a first driven gear (15) which are respectively fixedly mounted on a first rotating roller (5) and a second rotating roller (6); the first driving gear (14) and the first driven gear (15) are meshed with each other; and a stepping motor (16) whose output end is fixedly connected to a rotating shaft of the first driving gear (14) is fixedly mounted on the gantry (1).

3. A high-precision flying shear according to claim 2, characterized in that: The clamping mechanism comprises an elastic member (17) sleeved on the mounting rod (9), and the two ends of the elastic member (17) are respectively fixedly connected to the corresponding mounting rod (9) and the mounting frame (8); two discs (18) are symmetrically mounted on the side wall of the gantry (1), and a first active magnet (19) is fixedly mounted on the side wall of the disc (18), and the two discs (18) are symmetrically distributed on the upper and lower sides of the two mounting rods (9); and a linkage mechanism is provided on the gantry (1) to enable the disc (18) to rotate synchronously with the first rotating roller (5) and the second rotating roller (6); A driven magnet (20) is fixedly mounted on one end of each mounting rod (9) away from the heat sink (10), and the magnetic poles of the adjacent ends of the adjacent first active magnets (19) and the driven magnets (20) are the same.

4. A high-precision flying shear according to claim 3, characterized in that: The spoiler mechanism comprises a metal air bag (21) fixedly mounted between a side wall of a slide groove (33) close to a pinch roller (2) and a first slider (11), and exhaust holes (22) are evenly arranged on the side wall of the metal air bag (21) close to a heat dissipation hole (13).

5. A high-precision flying shear according to claim 4, characterized in that: The linkage mechanism comprises a second driving gear (23) and a second driven gear (24) respectively fixedly mounted on the rotating shafts of the two discs (18); and the second driving gear (23) and the second driven gear (24) are meshed with each other; A sprocket (25) is fixedly sleeved on the rotating shafts of the first driven gear (15) and the second driven gear (24), and a chain (26) is sleeved between the two sprockets (25).

6. A high-precision flying shear according to claim 5, characterized in that: A threaded rod (27) is horizontally threadedly mounted on the side wall of the slide groove (33) away from the pinch roller (2), and the threaded rod (27) penetrates the side wall of the slide groove (33) away from the pinch roller (2).

7. A high-precision flying shear according to claim 6, characterized in that: The elastic member (17) is provided with a cavity (28), and a hole (29) communicating with the outside is provided on the bottom wall of the cavity (28).

8. A high-precision flying shear according to claim 3, characterized in that: A guide cavity (30) is provided on the disk (18) located above the plane where the second rotating roller (6) is located. The guide cavity (30) and the first active magnet (19) are located on the same diameter of the disk (18), and an active magnet (31) is slidably installed in the guide cavity (30); One end of the movable magnet (31) close to the contact surface between the first active magnet (19) and the disk (18) is a south pole; The end of the driven magnet (20) away from the heat sink (10) is a south pole, and the attraction force between the active magnet (31) and the first active magnet (19) is smaller than the weight of the active magnet (31) itself.

9. A high-precision flying shear according to claim 1, characterized in that: The bottom wall of the heat dissipation plate (10) is evenly provided with anti-slip patterns.

10. A high-precision flying shear according to claim 3, characterized in that: The driven magnet (20) is externally covered with a heat-insulating cover (32).

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