A high-rigidity spiral main drive-hydraulic frequency modulation type medium and thick plate rolling shearing device

Abstract

The present application belongs to the technical field of metal plate shearing equipment, and particularly relates to a high-rigidity spiral main drive-hydraulic frequency modulation type medium plate rolling shearing device. A portal rigid frame is adopted for the rack assembly to provide a bearing base for the whole device. A double-link symmetrical arrangement structure is adopted for the connecting rod shearing mechanism to drive the shearing blade to make circular arc swing under the power drive, so as to realize the rolling shearing of the plate. The spiral drive mechanism is hingedly installed on the side of the rack, and outputs a large-tonnage linear high-rigidity driving force through the spiral transmission to provide the main power for the shearing action. The hydraulic amplitude modulation mechanism takes the right end of the cross bar as the piston shaft, cooperates with the hydraulic rod sleeve to form a sealed hydraulic chamber, and realizes the stepless adjustment of the shearing track through the real-time control of the relative axial position of the high-frequency response hydraulic rod sleeve and the cross bar. The present application adopts the master-slave driving mode of mechanical spiral-hydraulic amplitude modulation, has compact overall structure, stable operation, good finished product shearing quality, and is suitable for the continuous and efficient shearing production of multiple specifications of metal plates.

Description

Technical Field

[0001] This invention belongs to the technical field of metal sheet shearing equipment, specifically relating to a high-rigidity spiral main drive-hydraulic frequency-adjustable medium-thick plate rolling shearing device. Technical Background

[0002] With the rapid development of the metal processing industry and the upgrading of demands in high-end manufacturing, industries such as automobile manufacturing, aerospace, and home appliances and kitchenware have placed higher requirements on the processing precision, production efficiency, and product adaptability of metal sheets. Sheet shearing, as one of the core processes in sheet production and deep processing, directly determines the cross-sectional quality, dimensional accuracy, and production cycle of the finished sheet material based on the equipment performance. Rolling shearing, also known as swivel shearing or oscillating shearing, uses a linkage mechanism to drive the shear blades in an arc-shaped oscillation, achieving continuous shearing of sheet material while it is moving. Compared to traditional guillotine shearing machines, it has significant advantages such as lower unit shearing force, no tearing of the sheared section, slower blade wear, and seamless adaptation to continuous roll forming production lines. It is the mainstream technical solution for fixed-length shearing and side cutting of medium and thin plates and is widely used in sheet processing production lines.

[0003] Currently, existing rolling shearing devices in the industry are mainly divided into two categories, both of which have significant technical shortcomings and are difficult to adapt to the current production demands for flexibility, high precision, and high efficiency. The first type is the crank-connecting rod mechanical rolling shearing device, which relies on an eccentric crank to drive the connecting rod to achieve the swing of the shear blade. Its shearing amplitude is determined by the eccentricity and the connecting rod size, making it unable to flexibly adapt to the processing of plates of different thicknesses and materials. When changing production models, it is necessary to stop the machine to disassemble the transmission mechanism, replace the eccentric sleeve, or adjust the connecting rod length. The operation process is cumbersome, the downtime for adjustment is long, and the adjustment accuracy depends on manual assembly experience, making it difficult to achieve precise amplitude control. Its adaptability to flexible production scenarios with multiple varieties and small batches is extremely poor, which seriously restricts production efficiency.

[0004] The second type is the pure hydraulically driven roller shear, which relies on hydraulic cylinders to directly drive the shearing mechanism. Theoretically, the swing amplitude can be changed by adjusting the stroke. However, it has many inherent defects due to the characteristics of hydraulic transmission itself: First, hydraulic oil is compressible, and changes in oil temperature will change the viscosity of the oil, resulting in low shearing positioning accuracy and repeatability, which is difficult to meet the shearing requirements of high-precision plates. Second, the hydraulic system has a slow response speed, and is prone to action lag in high-speed continuous shearing scenarios, which limits the improvement of shearing cycle time. Third, the entire hydraulic system has complex pipelines and many sealing points, which are prone to oil leakage during long-term operation, which will not only contaminate the plate surface and the production environment, but also bring high maintenance costs and spare parts consumption. Fourth, the hydraulic system has high energy consumption and high heat generation under high-tonnage shearing conditions, requiring a large cooling system. The overall equipment has a large footprint and high operating costs, which is difficult to meet the compact layout and low-carbon operation requirements of modern production lines.

[0005] In summary, existing rolling shearing devices cannot simultaneously meet the performance requirements of high-response drive, high-precision shearing, and stepless rapid amplitude adjustment. The industry urgently needs a new type of rolling shearing device with fast drive response, high shearing accuracy, and convenient amplitude adjustment to support the flexible and high-quality upgrading of the metal sheet processing industry. Summary of the Invention

[0006] In view of the above-mentioned technical status, the purpose of this invention is to provide a high-rigidity spiral main drive-hydraulic frequency-adjustable medium-thick plate rolling shearing device. This device uses a spiral press as the shearing power source, which has fast response speed, large output, and high shearing accuracy. At the same time, it realizes stepless and rapid adjustment of the shearing swing amplitude through a hydraulic amplitude adjustment mechanism, which can flexibly adapt to the shearing needs of different specifications of plates and effectively solve the problems of cumbersome swing amplitude adjustment and insufficient driving performance of existing rolling shearing devices.

[0007] To achieve the above objectives, the technical solution adopted by the present invention is as follows: a high-rigidity spiral main drive-hydraulic frequency-adjustable medium-thick plate rolling shearing device is provided, the structure of which includes: a frame assembly, a connecting rod shearing mechanism, a spiral drive mechanism, and a hydraulic amplitude adjustment mechanism; wherein, the frame assembly is the foundation, providing installation support and rigidity assurance for the entire device; the connecting rod shearing mechanism adopts a double-connecting rod symmetrical arrangement structure and is installed inside the frame assembly, realizing the arc swing shearing of the shear blade under power drive; the spiral drive mechanism is hinged to the right side of the frame assembly, outputting linear reciprocating driving force through spiral transmission, providing stable power for the shearing action; the hydraulic amplitude adjustment mechanism is integrated between the spiral drive mechanism and the connecting rod shearing mechanism, and realizes stepless adjustment of the shearing amplitude by adjusting the effective stroke of the drive through hydraulic control.

[0008] The frame assembly is a portal rigid frame, specifically composed of an upper crossbeam, a left frame, a right frame, and a base plate. The left and right frames are vertically symmetrically arranged, with their top ends fixed to the upper crossbeam by bolts and their bottom ends fixed to the base plate, together forming a closed gantry load-bearing frame. Multiple elongated oval weight-reduction holes are opened on the side wall of the upper crossbeam to reduce the overall weight of the machine while ensuring structural rigidity.

[0009] The linkage shearing mechanism consists of two sets of symmetrically arranged linkages, crossbars, shear plates, and shear blades. Each set of linkages has three hinge points along its length: upper, middle, and lower. The upper hinge point is hinged to the inner side of the upper crossbeam via a hinge cover, forming a fixed hinge support point. The middle hinge point is rotatably connected to the crossbar via a pin, serving as the power input point. The lower hinge point is hinged to the shear plate via a pin, serving as the power output point. The shear blades are fixedly installed on the lower surface of the shear plate with bolts, the cutting edge facing downwards and corresponding to the position of the material to be sheared on the upper surface of the base plate. The two sets of linkages move synchronously, driving the shear plate to perform planar circular arc motion, thereby achieving rolling shearing of the material.

[0010] Both the left and right ends of the shear blade are provided with tie rod hinge holes. The tie rod can be hinged to the shear blade by choosing either the left or right side of the frame. By changing the hinge installation position of the tie rod, the cutting angle of the shear blade and the strength state of the tie rod can be adjusted to adapt to the rolling cutting posture requirements under different shearing amplitudes.

[0011] The right end section of the crossbar is machined into a piston shaft structure.

[0012] The screw drive mechanism is a screw press, consisting of a hinged housing, a motor, a drive gear, a driven screw gear, bearings, and a screw rod. The hinged housing is a box structure, hingedly mounted on a support on the outside of the right frame, and can swing around the hinge point in the vertical plane, adapting to the angle changes caused by the swing of the connecting rod and avoiding transmission jamming. The motor is a geared motor, fixedly mounted on the top of the hinged housing, with its output shaft keyed to the drive gear. The driven screw gear is a gear disc with internal threads, supported by bearings inside the hinged housing. Its external teeth mesh with the drive gear, and its internal threads cooperate with the screw rod to form a screw transmission pair. The screw rod is horizontally arranged, with its left end hinged to the hinge seat on the outside of the hydraulic rod sleeve. The motor drives the driven screw gear to rotate through the gear pair, converting the rotational motion into the linear reciprocating motion of the screw rod through screw transmission, outputting a large-tonnage stable thrust.

[0013] The core of the hydraulic amplitude adjustment mechanism is a hydraulic rod sleeve, which is located outside the piston shaft section at the right end of the crossbar. The two together form two independent sealed hydraulic cavities, one on the left and one on the right. A piston seal and a wear-resistant ring are installed on the outer circumferential surface of the piston shaft. The piston seal is used to achieve dynamic sealing between the two cavities to prevent oil leakage. The wear-resistant ring is used for radial support and guidance to reduce wear between the piston shaft and the inner wall of the hydraulic rod sleeve.

[0014] The right end of the hydraulic rod sleeve has a connecting shaft section that is hinged to the output end of the screw drive mechanism. The side wall of the hydraulic rod sleeve has two sets of oil inlets and outlets, which are connected to the left and right hydraulic cavities respectively. By controlling the inlet, outlet and pressure holding of the oil through an external hydraulic control system, the axial relative position of the hydraulic rod sleeve with respect to the crossbar can be adjusted, the initial position of the drive point in the middle of the connecting rod can be changed, and the swing amplitude of the connecting rod can be adjusted to achieve stepless adjustment of the shearing amplitude. After the amplitude adjustment is completed, the hydraulic system locks the oil pressure, and the hydraulic rod sleeve and the crossbar maintain a relatively fixed rigid connection state to ensure the stable transmission of shearing power.

[0015] The spiral drive mechanism is an active drive actuator, and the hydraulic amplitude adjustment mechanism is a driven actuator for the relative motion sequence of the left and right connecting rods. The overall shearing action adopts a master-slave cooperative control strategy.

[0016] While the spiral drive mechanism drives the linkage shearing mechanism, the hydraulic amplitude adjustment mechanism dynamically adjusts the linkage distance between itself and the hinge point of the crossbar, thereby adjusting the timing difference of the movement of the left and right linkages and adjusting the rolling cutting trajectory of the shear blade.

[0017] The hinge point between the hinged outer shell and the frame assembly, and the hinge point between the helical rod and the hydraulic rod sleeve, form a double-hinged transmission chain, which adapts to the angular deviation of the crossbar during the swing of the adaptive link and eliminates the additional bending moment in the transmission.

[0018] The advantages of this invention are: the machine has a compact structure, high integration, and is easy to maintain; it is suitable for high-precision, multi-specification, and high-efficiency shearing of various metal sheets. This device achieves a dual improvement in shearing performance and adaptability through the coordinated optimization of the drive method and amplitude modulation structure. The overall structure adopts a symmetrical arrangement of gantry frame and double connecting rod, which has good rigidity, balanced shearing force, stable operation, and high shearing section quality. By using a screw press as the shearing power source, it offers faster response, more stable output, and higher shearing precision compared to traditional hydraulic drives, making it suitable for high-speed continuous shearing scenarios. It also avoids the problems of complex piping, easy leakage, and high maintenance costs associated with hydraulic systems. Furthermore, the screw drive mechanism adopts a hinged installation method, which can adapt to changes in the swing angle of the connecting rod, ensuring smooth transmission without jamming. The proposed hydraulic amplitude adjustment mechanism uses the crossbar itself as the piston shaft and achieves stepless and rapid adjustment of the shearing amplitude through hydraulic control. It can flexibly adapt to the shearing needs of plates of different thicknesses and materials without stopping the machine to replace mechanical parts, greatly improving product changeover efficiency and adapting to flexible production needs. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the overall structure of the invention device; Figure 2 This is a schematic diagram of the linkage shearing mechanism of the device; Figure 3 This is a partially enlarged schematic diagram of the hydraulic amplitude adjustment part of the device; Figure 4 This is a cross-sectional view of the hydraulic rod sleeve and crossbar of the device, as well as a disassembled schematic diagram of the sealing components. Figure 5 is a schematic diagram of the installation position of the screw drive mechanism of the device; Figure 6 is a schematic diagram of the disassembled structure of the screw drive mechanism of the device; Figure 7 This is a flowchart of the rolling cutting process of the device; In the diagram: 1. Upper crossbeam; 2. Left frame; 3. Right frame; 4. Screw press; 5. Plate; 6. Connecting rod; 7. Crossbar; 8. Shear blade; 9. Base plate; 10. Shear blade; 11. Tie rod; 12. Hydraulic rod sleeve; 13. Hinge cover; 14. Screw rod; 15. Piston seal; 16. Wear ring; 17. Hinge housing; 18. Drive gear; 19. Motor; 20. Screw driven gear; 21. Bearing. Detailed Implementation

[0020] The technical solution of the present invention will be clearly and completely described below with reference to the accompanying drawings. All other solutions obtained by those skilled in the art based on the solutions of the present invention without creative effort are within the scope of protection of the present invention.

[0021] As shown in Figures 1-2, the present invention provides a high-rigidity spiral main drive-hydraulic frequency-adjustable medium-thick plate rolling shearing device, which mainly includes: a frame assembly, a connecting rod shearing mechanism, a spiral drive mechanism, and a hydraulic amplitude adjustment mechanism. The left frame 2 and right frame 3 are arranged vertically and symmetrically. The top end is fixedly connected to the upper crossbeam 1 by bolts, and the bottom end is fixedly connected to the base plate 9, together forming a gantry-type rigid load-bearing frame. Two sets of connecting rods 6 are symmetrically installed on the inner side of the frame. The upper end of the connecting rod 6 is hinged to the upper crossbeam 1 through the hinge cover 13, the middle part is rotatably connected to the crossbar 7, and the lower end is hinged to the shearing plate 8. The shearing blade 10 is fixedly installed on the lower surface of the shearing plate 8, corresponding to the position of the plate 5 to be sheared on the base plate 9. The right end of the shearing plate 8 is hinged to the tie rod 11, and the other end of the tie rod 11 is hinged to the inner side of the right frame 3 to constrain the movement trajectory of the shearing plate 8 and ensure the stability of the cutting angle of the shearing blade 10. The screw press 4 is hinged to the outer side of the right frame 3, and the output end is connected to the right end of the crossbar 7 through the hydraulic amplitude adjustment mechanism to provide driving force for the shearing action.

[0022] As shown in Figure 3-4, the hydraulic sleeve 12 of the hydraulic amplitude adjustment mechanism is coaxially sleeved on the outside of the piston shaft at the right end of the crossbar 7, forming a sealed hydraulic cavity between them. A piston seal 15 and a wear-resistant ring 16 are installed between the piston shaft and the inner wall of the hydraulic sleeve to ensure sealing performance and smooth movement. When it is necessary to adjust the shearing amplitude, the external hydraulic system controls the flow of oil into and out of the hydraulic cavity, pushing the hydraulic sleeve 12 to move axially relative to the crossbar 7: when oil is introduced into the right cavity, the hydraulic sleeve moves to the left, the drive point moves to the left, the swing amplitude of the connecting rod increases under the same drive stroke, and the depth of the shear blade increases, adapting to thicker plates; when oil is introduced into the left cavity, the hydraulic sleeve moves to the right, the shearing amplitude decreases, adapting to the shearing of thin plates. After amplitude adjustment is completed, the hydraulic system locks the oil, and the hydraulic sleeve and crossbar maintain a rigid connection, ensuring stable transmission of shearing power.

[0023] As shown in Figure 5-6, the hinged outer shell 17 of the screw press 4 is hinged to the outer support of the right frame 3, and can swing adaptively with changes in the transmission angle. The motor 19 is fixedly installed on the top of the hinged outer shell 17, and the output shaft drives the drive gear 18 to rotate. Through gear meshing, the drive gear 20 rotates. The drive gear 20 engages with the screw rod 14 through the internal thread, converting the rotational motion into the linear reciprocating motion of the screw rod 14, outputting a large-tonnage stable thrust. The drive gear 20 is rotatably supported in the hinged outer shell through the bearing 21, ensuring smooth transmission.

[0024] After the sheet material is conveyed to the designated position, the screw press starts and outputs linear drive force, causing the crossbar 7 to reciprocate laterally. This, in turn, causes the two sets of connecting rods 6 to swing synchronously around the upper hinge point, driving the shear blade 8 to perform a planar circular arc motion. This allows the shear blade 10 to cut into the sheet material from one side and roll to the other side to complete the shearing action. The tie rod 11, hinged to the right end of the shear blade 8, moves synchronously with the shear blade, constraining its movement trajectory, ensuring a stable shear blade cutting angle, and improving the quality of the sheared section.

[0025] As shown in Figure 7, the complete shearing cycle of this device is as follows: State I is the initial standby state, with connecting rod 6 in a vertical position, and shear blade 8 and shear blade 10 maintaining a horizontal high position. The plate 5 to be sheared is conveyed along the base plate 9 to the preset shearing position. State II is the right-side cutting state, with the spiral rod 14 extending to the left, pushing the hydraulic sleeve 12 and crossbar 7 to move to the left. Connecting rod 6 swings to the left around the upper hinge point. With the trajectory constraint of pull rod 11, shear blade 8 presents an inclined posture with the left side higher than the right side. The right side of shear blade 10 first contacts and cuts into the plate, and gradually completes the rolling cutting action in the right area as the connecting rod swings. State III is the mid-position transition state, with the spiral rod 14 retracting to the right, driving the crossbar 7 to move back to the right. Connecting rod 6 swings back to the vertical position, and shear blade 8 returns to a horizontal posture, completing the right half of the shearing stroke. State IV is the left-side rolling cut state. The auger 14 continues to retract to the right, pulling the crossbar 7 to move further to the right. The connecting rod 6 swings to the right around the upper hinge point, causing the shear blade 8 to tilt to the left and up. The shear blade 10 continues to roll downwards on the left, completing the shearing operation across the entire sheet. State V is the reset standby state. The auger 14 extends to the left to return to its original position, pushing the crossbar 7 to the left to its initial position. The connecting rod 6 swings back to the vertical position, and the shear blade 10 rises with the shear blade 8 to its initial high position, completing one complete shearing cycle and awaiting the next shearing command.

[0026] The above description is merely a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in the present invention should be included within the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be determined by the scope of the claims.

Claims

1. A high-rigidity spiral main drive-hydraulic frequency-adjustable medium-thick plate rolling shearing device, characterized in that: It includes a frame assembly, a linkage shearing mechanism, a screw drive mechanism, and a hydraulic amplitude adjustment mechanism; wherein, the linkage shearing mechanism is located inside the frame assembly, the screw drive mechanism is hinged to the outside of the right end of the frame assembly, and the hydraulic amplitude adjustment mechanism is installed on the right end of the crossbar; The frame assembly includes left and right frames arranged symmetrically in the vertical direction; the top of the left and right frames is fixed to an upper crossbeam, and the bottom is fixed to a base plate, forming a portal rigid frame. The linkage shearing mechanism includes two sets of symmetrically arranged linkages. The linkages have three hinge points (upper, middle, and lower) along their length. The upper end is hinged to the upper crossbeam, the middle part is rotatably connected to the crossbar, and the lower end is hinged to the shear blade plate. The lower surface of the shear blade plate is fixed with a shear blade. The screw drive is a screw press, which is based on a hinged housing. A motor is fixedly installed on the top of the hinged housing. The output shaft of the motor is connected to a drive gear. The drive gear meshes with the screw driven gear. The screw driven gear rotates and is supported inside the hinged housing through a bearing. The motor drives the screw driven gear to rotate through the gear pair, and the rotational motion is converted into the linear reciprocating motion of the screw rod through the screw transmission. The crossbar at the other end away from the connecting rod is machined into a piston shaft structure; The hydraulic amplitude adjustment mechanism includes a hydraulic rod sleeve, which is located outside the piston shaft of the crossbar. The piston shaft is equipped with a piston seal and a wear-resistant ring on its outer circumference. The hydraulic rod sleeve is coaxially sleeved on the outside of the piston shaft, and the two together form two independent sealed hydraulic cavities on the left and right. The hydraulic rod sleeve is hinged to the output end of the screw drive mechanism.

2. The high-rigidity spiral main drive-hydraulic frequency-adjustable medium-thick plate rolling shearing device according to claim 1, characterized in that: The frame assembly is a closed gantry load-bearing frame; multiple elongated oval weight-reduction holes are opened on the side wall of the upper crossbeam.

3. The high-rigidity spiral main drive-hydraulic frequency-adjustable medium-thick plate rolling shearing device according to claim 1, characterized in that: Both ends of the shear blade are provided with tie rod hinge holes. The tie rod can be hinged to the shear blade by choosing either the left or right side of the frame. By changing the hinge installation position of the tie rod, the cutting angle of the shear blade and the strength state of the tie rod can be adjusted to adapt to the rolling cutting posture requirements under different shearing amplitudes.

4. The high-rigidity spiral main drive-hydraulic frequency-adjustable medium-thick plate rolling shearing device according to claim 1, characterized in that: The hinged housing of the helical drive mechanism is a box structure, which is hinged to the support on the outside of the right frame. It can swing around the hinge point in the vertical plane, adapting to the angle changes caused by the swing of the connecting rod and avoiding transmission jamming.

5. The high-rigidity spiral main drive-hydraulic frequency-adjustable medium-thick plate rolling shearing device according to claim 1, characterized in that: The driven helical gear is a gear disc with internal threads, and the internal threads cooperate with the helical rod to form a helical transmission pair.

6. The high-rigidity spiral main drive-hydraulic frequency-adjustable medium-thick plate rolling shearing device according to claim 1, characterized in that: While the spiral drive mechanism drives the linkage shearing mechanism, the hydraulic amplitude adjustment mechanism dynamically adjusts the linkage distance between itself and the hinge point of the crossbar, thereby adjusting the timing difference of the movement of the left and right linkages and adjusting the rolling cutting trajectory of the shear blade.

7. The high-rigidity spiral main drive-hydraulic frequency-adjustable medium-thick plate rolling shearing device according to claim 1, characterized in that: The helical rod is arranged horizontally, and the hinge joint is hinged to the outer hinge seat of the hydraulic rod sleeve; the helical drive mechanism is an active drive actuator, and the hydraulic amplitude adjustment mechanism is a driven actuator for the relative motion sequence of the left and right connecting rods. The overall shearing action adopts a master-slave cooperative control strategy.

8. A high-rigidity spiral main drive-hydraulic frequency-adjustable medium-thick plate rolling shearing device according to claim 1, characterized in that: The hinge points of the hinged housing and the frame assembly, and the hinge points of the screw rod and the hydraulic rod sleeve form a double-hinged transmission chain, which adapts to the angular deviation of the crossbar during the swing of the adaptive link and eliminates the additional bending moment of the transmission.

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