Connecting rod double-layer hydraulic transverse cutting shear capable of feeding tailings and performing fixed-length clamping and feeding

Abstract

The utility model relates to the field of accessory devices of shearing machines or shearing equipment, in particular to a pair of connecting rod double-layer hydraulic transverse cutting shears capable of feeding tailings and performing fixed-length clamping and feeding. The connecting rod double-layer hydraulic transverse cutting shear capable of feeding the tailings and performing fixed-length clamping and feeding comprises a fixed machine frame (1) and a movable machine frame (2) and is characterized by further comprising a shearing assembly (3) and a clamping and feeding assembly (4), the fixed machine frame (1) is fixed to the ground, and the movable machine frame (2) is movably arranged on a rail (21); the shearing assembly (3) comprises a pull rod (31), a shearing knife rest (32), a shearing knife (33), a shearing hydraulic cylinder (34), a transmission mechanism (35) and a fixed knife rest (36); the clamping and conveying assembly (4) comprises two clamping and conveying rollers (41), a clamping and conveying hydraulic cylinder (43) and a feeding turning plate (44). The utility model has the advantages of few faults and high shearing quality.

Description

Technical Field

[0001] This utility model relates to the field of auxiliary devices for shearing machines or shearing equipment, specifically a double-layer hydraulic cross-cutting shear with connecting rods that can feed tail material and clamp materials to a fixed length. Background Technology

[0002] In continuous production cold-rolled strip steel processing lines, a cross-cutting shear is installed at the entrance section for cutting the beginning and end of the strip. The smoothness and quality of the shearing affect the continuity of the entire line's production rhythm. In previous equipment configurations, a set of cross-cutting shears was typically installed at both the upper and lower channels. Hydraulic cylinders directly pushed the blade holder up and down for shearing, and a gear and rack system kept the two hydraulic cylinders mechanically synchronized. The blade holder typically pushed upwards for shearing, a type known as bottom-cutting. When cutting the strip beginning, the first photoelectric switch detects the strip beginning position, and then the uncoiler encoder and PLC calculate the strip length. When the second photoelectric switch detects the strip beginning, the pinch rollers depress, and shearing begins according to the set scrap length and quantity. When cutting the strip end, the remaining coil length is calculated, the pinch rollers depress, and shearing begins according to the set scrap length and quantity.

[0003] Problems with this device:

[0004] 1. The upper and lower channels are each equipped with independent cross-cutting shears, which take up a lot of space and make it inconvenient to change blades and maintain them, especially the lower channel, which is blocked by various equipment above.

[0005] 2. The two shearing hydraulic cylinders are installed on both sides respectively. Although they are synchronized by gears and racks, the inter-tooth gaps result in poor synchronization, which affects the shearing quality.

[0006] 3. In actual field use, it was found that the method of fixing the blade holder on top and the shearing blade holder on the bottom, and pushing the shearing upward, although it can better control the shape of the cut strip and reduce the downward bending of the strip head, can also easily cause the thin strip steel to be pulled and curled at the cut edge.

[0007] 4. Due to the discrepancy between the calculated length and the actual length of the strip, the length of the last scrap plate is often less than the distance from the pinch roller to the cutter edge during tail cutting. The direct problem this causes is that the last scrap plate remains in place and cannot slide into the scrap chute on its own. Utility Model Content

[0008] In order to overcome the shortcomings of the existing technology and provide a shearing device with fewer malfunctions and higher shearing quality, this utility model discloses a double-layer hydraulic cross-cutting shear with connecting rod that can feed tail material and clamp materials to a fixed length.

[0009] This utility model achieves its invention objective through the following technical solution:

[0010] A linkage-driven double-layer hydraulic cross-cutting shear capable of feeding tail material and clamping to a fixed length includes a fixed frame and a movable frame, characterized in that it further includes a shearing assembly and a clamping assembly.

[0011] The fixed frame is fixed to the ground. The lower part of the fixed frame is provided with a track that runs from the outside of the fixed frame to the inside of the fixed frame. The mobile frame is movably mounted on the track by the rollers at the bottom. The bottom of the fixed frame is also provided with a frame moving hydraulic cylinder. The moving end of the piston rod of the frame moving hydraulic cylinder is connected to the mobile frame.

[0012] The shearing assembly includes a pull rod, a shearing blade holder, shearing blades, a shearing hydraulic cylinder, a transmission mechanism, and a fixed blade holder.

[0013] The tie rod is horizontally and movably mounted on the mobile frame;

[0014] The shear blade holder is movably mounted inside the mobile frame and located at the bottom of the tie rod. The shear blade is fixed at the bottom of the shear blade holder with the shearing blade facing downward.

[0015] The shearing hydraulic cylinder is fixed to the mobile frame by the cylinder body, and the moving end of the piston rod of the shearing hydraulic cylinder is connected to the pull rod;

[0016] There are at least two sets of transmission mechanisms. Each set of transmission mechanisms includes one upright and two connecting rods. Each set of transmission mechanisms is sequentially mounted on the tie rod and arranged as follows: the upper part of the upright is sequentially fixed on the movable frame, the inner ends of the two connecting rods are rotatably connected to the tie rod through pins, the outer end of one connecting rod is rotatably connected to the top of the upright through pins, and the outer end of the other connecting rod is rotatably connected to the shearing blade holder through pins.

[0017] The fixed blade holder is fixed inside the movable frame and located below the shearing blade holder;

[0018] When the piston rod of the shearing hydraulic cylinder extends or retracts, the traction rod moves horizontally, and then drives the shearing blade holder and shearing blade to move vertically through the transmission mechanism.

[0019] The clamping assembly includes two clamping rollers, a clamping hydraulic cylinder, and a feeding flap. The two clamping rollers are rotatably mounted on one side of the fixed frame. The outer sides of the two clamping rollers face each other and are arranged vertically. One of the clamping rollers is driven to rotate by a drive motor. The outer sides of the two clamping rollers form a conveying channel, which is directly opposite the shearing blade of the shearing knife. The cylinder body of the clamping hydraulic cylinder is fixed on the fixed frame. The moving end of the piston rod of the clamping hydraulic cylinder is connected to the clamping roller located above. One end of the feeding flap is rotatably mounted on the fixed frame, and the other end of the feeding flap extends into the movable frame and is also connected to the moving end of the piston rod of the clamping hydraulic cylinder.

[0020] The aforementioned double-layer hydraulic cross-cutting shear with connecting rod capable of feeding tail material and clamping to a fixed length is characterized in that: the shearing assembly also includes detection gratings, and two detection gratings are arranged sequentially in front of the conveying channel; an encoder is provided on the drive motor of the clamping roller.

[0021] The aforementioned double-layer hydraulic cross-cutting shear with connecting rod capable of feeding tail material and clamping to a fixed length is characterized in that: the number of shearing components and clamping components are equal and there are at least two of each.

[0022] The method of using the aforementioned double-layer hydraulic cross-cutting shear with connecting rod capable of feeding tail material and clamping to a fixed length is characterized by the following steps being implemented sequentially:

[0023] S1. Initialization: After the lead of the sheet material to be sheared is input from the lower clamping roller, the piston rod of the clamping hydraulic cylinder extends and presses down the upper clamping roller, so that the two clamping rollers clamp the sheet material and convey it to the shearing blade through the conveying channel;

[0024] S2. Shearing: After the sheet material has been conveyed to the shearing blade a set distance, the clamping rollers pause rotation to temporarily stop the conveying of the sheet material. The piston rod of the shearing hydraulic cylinder extends and pushes the pull rod to extend horizontally. Through the transmission mechanism, that is, the two connecting rods change from a bent state to a straight connection state, driving the shearing blade holder and shearing blade to move downward vertically. The shearing blade shears the sheet material, and the sheared sheet material slides down to the receiving trough below under the action of gravity. Then, the piston rod of the shearing hydraulic cylinder retracts and pulls the pull rod back horizontally. Through the transmission mechanism, that is, the two connecting rods change from a straight connection state to a bent state, driving the shearing blade holder and shearing blade to move upward vertically.

[0025] S3. Repeat: Repeat step S until the set number of cuts is achieved in the board material;

[0026] S4. Finishing: If the length of the last piece of material cut from the sheet is less than the distance from the clamping roller to the shearing blade, the material cannot slide down to the receiving trough on its own and will stop between the clamping roller and the shearing blade. At this time, the piston rod of the clamping hydraulic cylinder retracts and lifts the feeding flap, so that the material falls into the receiving trough.

[0027] S5. Offline Maintenance: The piston rod of the clamping hydraulic cylinder retracts to lift the upper clamping roller and feeding flap, avoiding the fixed frame window. The piston rod of the frame moving hydraulic cylinder extends, pushing the moving frame along the track out of the fixed frame to the offline position for maintenance.

[0028] The method of using the aforementioned double-layer hydraulic cross-cutting shear with connecting rod capable of feeding tail material and clamping to a fixed length is characterized by the following steps being implemented sequentially:

[0029] S1. Initialization: When the lead of the sheet material to be sheared passes through the first detection grating on the lower pinch roller, the encoder of the pinch roller drive motor starts counting. Then, when the lead of the sheet material passes through the second detection grating, the piston rod of the pinch hydraulic cylinder extends and presses down the upper pinch roller, so that the two pinch rollers clamp the sheet material and convey it to the shearing knife through the conveying channel.

[0030] S2. Shearing: When the encoder of the pinch roller drive motor counts to the set value, the sheet material is conveyed to the shearing blade a set distance. The pinch roller stops rotating to temporarily stop the conveying of the sheet material. The piston rod of the shearing hydraulic cylinder extends and pushes the pull rod to extend horizontally. Through the transmission mechanism, that is, the two connecting rods change from a bent state to a straight connection state, driving the shearing blade holder and shearing blade to move downward vertically. The shearing blade cuts the sheet material. The cut sheet material slides down to the receiving trough below under the action of gravity. Then, the piston rod of the shearing hydraulic cylinder retracts and pulls the pull rod back horizontally. Through the transmission mechanism, that is, the two connecting rods change from a straight connection state to a bent state, driving the shearing blade holder and shearing blade to move upward vertically. At the same time, the encoder of the pinch roller drive motor restarts counting.

[0031] S3. Repeat: Repeat step S until the set number of cuts is achieved in the board material;

[0032] S4. Finishing: If the length of the last piece of material cut from the sheet is less than the distance from the clamping roller to the shearing blade, the material cannot slide down to the receiving trough on its own and will stop between the clamping roller and the shearing blade. At this time, the piston rod of the clamping hydraulic cylinder retracts and lifts the feeding flap, so that the material falls into the receiving trough.

[0033] S5. Offline Maintenance: The piston rod of the clamping hydraulic cylinder retracts to lift the upper clamping roller and feeding flap, avoiding the fixed frame window. The piston rod of the frame moving hydraulic cylinder extends, pushing the moving frame along the track out of the fixed frame to the offline position for maintenance.

[0034] Shearing equipment is typically located in the middle of the production line entrance section, and the shearing quality directly affects the subsequent welding quality. This invention adopts the following structure:

[0035] 1. It adopts a double-layer structure with a compact layout, consisting of a mobile frame and a fixed frame. The mobile frame is equipped with the main equipment such as the shearing blade holder, connecting rod, tie rod, shearing hydraulic cylinder, and tilting plate. It can be moved laterally to the offline area for maintenance via the lower moving hydraulic cylinder.

[0036] 2. A fixed blade holder is positioned below, with the shearing blade holder above, and the upper shear blade is angled. Using a linkage system, a single hydraulic cylinder pushes the blade from outside the production line to cut downwards; this is called the top-cutting type. The shearing action is simple and easy to maintain. Alternatively, using a linkage and tie rod system, only one hydraulic cylinder can be used for propulsion, ensuring good synchronization. Positioning the shearing hydraulic cylinder offline avoids daily hydraulic oil leaks that could contaminate the strip and equipment online. Using only one cylinder also reduces the amount of piping required.

[0037] 3. A pair of pinch rollers are installed at the inlet to pinch and feed the strip steel. Each forward feed results in one cut. The forward feed length is the length of the scrap strip to be cut, which can be set in the unit's HMI and calculated by counting using a rear encoder on the motor.

[0038] 4. Between the blade and the pinch rollers, there is a set of pneumatically operated feeding flaps. When cutting the last strip, if the pinch rollers cannot clamp it, the flaps can be flipped up to allow the last piece of scrap to slide into the scrap trough. The flaps are also mounted on the mobile frame, and are compact so that the mobile frame can be moved out as a whole without interfering with other equipment when the flaps are retracted.

[0039] 5. The shear blade clearance is adjusted by adjusting the upper blade holder using a set of jack wedge adjustment devices. The movement is guided by a copper slider, and the clearance is eliminated by a pressure plate and spring.

[0040] The mobile frame is equipped with wheels at the bottom, and the fixed frame is mounted on rails. The mobile frame is pushed out and retracted by a mobile hydraulic cylinder, allowing for maintenance work such as blade replacement in the offline position.

[0041] This utility model has the following beneficial effects:

[0042] It utilizes a linkage shearing system, an upper shearing method, a movable frame, and a feeding tilting plate, effectively solving four major problems previously existing: shearing synchronization, edge curling, offline maintenance, and feeding of the last steel plate. It offers stable performance, convenient maintenance, few malfunctions, and good shearing quality. Attached Figure Description

[0043] Figure 1 This is the front view of this utility model.

[0044] Figure 2 This is the left view of this utility model. Detailed Implementation

[0045] The present invention will be further illustrated by specific embodiments below. Example

[0046] A double-layer hydraulic cross-cutting shear with linkage, capable of feeding tail material and clamping to a fixed length, includes a fixed frame 1, a movable frame 2, a shearing assembly 3, and a clamping assembly 4, such as... Figure 1 and Figure 2As shown, the specific structure is:

[0047] The fixed frame 1 is fixed on the ground. The lower part of the fixed frame 1 is provided with a track 21 that is laid from the outside of the fixed frame 1 to the inside of the fixed frame 1. The movable frame 2 is movably mounted on the track 21 by the bottom rollers. The bottom of the fixed frame 1 is also provided with a frame moving hydraulic cylinder 22. The moving end of the piston rod of the frame moving hydraulic cylinder 22 is connected to the movable frame 2.

[0048] The shearing assembly 3 includes a pull rod 31, a shearing blade holder 32, a shearing blade 33, a shearing hydraulic cylinder 34, a transmission mechanism 35, and a fixed blade holder 36.

[0049] The tie rod 31 is horizontally and movably mounted on the mobile frame 2;

[0050] The shearing blade holder 32 is movably disposed within the mobile frame 2 and located at the lower part of the tie rod 31. The shearing blade 33 is fixed to the bottom of the shearing blade holder 32 with the shearing blade facing downward.

[0051] The shearing hydraulic cylinder 34 is fixed to the movable frame 2 by the cylinder body, and the moving end of the piston rod of the shearing hydraulic cylinder 34 is connected to the pull rod 31;

[0052] There are at least two sets of transmission mechanisms 35. Each set of transmission mechanisms 35 includes one upright 351 and two connecting rods 352. Each set of transmission mechanisms 35 is sequentially mounted on the pull rod 31 and arranged as follows: the upper part of the upright 351 is sequentially fixed on the movable frame 2, the inner ends of the two connecting rods 352 are rotatably connected to the pull rod 31 by a pin, the outer end of one connecting rod 352 is rotatably connected to the top of the upright 351 by a pin, and the outer end of the other connecting rod 352 is rotatably connected to the shearing blade holder 32 by a pin.

[0053] The fixed blade holder 36 is fixed inside the movable frame 2 and located below the shearing blade holder 32;

[0054] When the piston rod of the shearing hydraulic cylinder 34 extends or retracts, the traction rod 31 moves horizontally, and then drives the shearing blade holder 32 and the shearing blade 33 to move vertically through the transmission mechanism 35.

[0055] The clamping assembly 4 includes two clamping rollers 41, a clamping hydraulic cylinder 43, and a feeding flap 44. The two clamping rollers 41 are rotatably mounted on one side of the fixed frame 1. The outer surfaces of the two clamping rollers 41 face each other and are arranged vertically. One of the clamping rollers 41 is driven to rotate by a drive motor. The outer surfaces of the two clamping rollers 41 form a conveying channel 42, which faces the shearing blade of the shearing knife 33. The cylinder body of the clamping hydraulic cylinder 43 is fixed on the fixed frame 1. The moving end of the piston rod of the clamping hydraulic cylinder 43 is connected to the clamping roller 41 located above. One end of the feeding flap 44 is rotatably mounted on the fixed frame 1, and the other end of the feeding flap 44 extends into the movable frame 2 and is also connected to the moving end of the piston rod of the clamping hydraulic cylinder 43.

[0056] In this embodiment, the shearing assembly 3 also includes a detection grating 37, and two detection gratings 37 are arranged in sequence in front of the conveying channel 42; the drive motor of the pinch roller 41 is equipped with an encoder.

[0057] In this embodiment, the number of shearing components 3 and clamping components 4 are equal, and there are two of each.

[0058] When using this embodiment, follow these steps in sequence:

[0059] S1. Initialization: When the lead of the sheet 5 to be sheared passes through the first detection grating 37 from the lower pinch roller 41, the encoder of the drive motor of the pinch roller 41 starts counting. Then, when the lead of the sheet 5 passes through the second detection grating 37, the piston rod of the pinch hydraulic cylinder 43 extends to press down the upper pinch roller 41, so that the two pinch rollers 41 clamp the sheet 5 and transport it to the shearing blade 33 through the conveying channel 42.

[0060] S2. Shearing: When the encoder of the drive motor of the pinch roller 41 counts to the set value, the plate 5 is conveyed to the shearing blade 33 by the set distance. The pinch roller 41 stops rotating to temporarily stop the conveying of the plate 5. The piston rod of the shearing hydraulic cylinder 34 extends to push the pull rod 31 to extend horizontally. Through the transmission mechanism 35, that is, the two connecting rods 352 change from the bent state to the straight connection state, driving the shearing blade holder 32 and the shearing blade 33 to move downward in the vertical direction. The shearing blade 33 shears the plate 5. The sheared plate 5 slides down to the receiving trough below under the action of gravity. Then, the piston rod of the shearing hydraulic cylinder 34 retracts and pulls the pull rod 31 back horizontally. Through the transmission mechanism 35, that is, the two connecting rods 352 change from the straight connection state to the bent state, driving the shearing blade holder 32 and the shearing blade 33 to move upward in the vertical direction. At the same time, the encoder of the drive motor of the pinch roller 41 starts counting again.

[0061] S3. Repeat: Repeat step S2 until the set number of cuts is made on board 5;

[0062] S4. Finishing: If the length of the last piece of material cut from the plate 5 is less than the distance from the clamping roller 41 to the shearing blade 33, the material cannot slide down to the receiving trough on its own and will stop between the clamping roller 41 and the shearing blade 33. At this time, the piston rod of the clamping hydraulic cylinder 43 retracts and lifts the feeding flap 44, so that the material falls into the receiving trough.

[0063] S5. Offline maintenance: The piston rod of the clamping hydraulic cylinder 43 retracts, lifting the upper clamping roller 41 and the feeding flap 44 to avoid the window of the fixed frame 1. The piston rod of the frame moving hydraulic cylinder 22 extends, pushing the moving frame 2 along the track 21 to move out of the fixed frame 1 to the offline position for maintenance.

Claims

1. A double-layer hydraulic cross-cutting shear with connecting rods, capable of feeding tail material and clamping to a fixed length, comprising a fixed frame (1) and a movable frame (2), characterized in that: It also includes a shearing assembly (3) and a clamping assembly (4). The fixed frame (1) is fixed on the ground. The lower part of the fixed frame (1) is provided with a track (21) that runs from the outside of the fixed frame (1) to the inside of the fixed frame (1). The movable frame (2) is movably mounted on the track (21) by means of the rollers at the bottom. The bottom of the fixed frame (1) is also provided with a frame moving hydraulic cylinder (22). The moving end of the piston rod of the frame moving hydraulic cylinder (22) is connected to the movable frame (2). The shearing assembly (3) includes a pull rod (31), a shearing blade holder (32), a shearing blade (33), a shearing hydraulic cylinder (34), a transmission mechanism (35), and a fixed blade holder (36). The tie rod (31) is horizontally and movably mounted on the mobile frame (2); The shearing blade holder (32) is movably disposed within the mobile frame (2) and located below the tie rod (31). The shearing blade (33) is fixed to the bottom of the shearing blade holder (32) with the shearing blade facing downward. The shearing hydraulic cylinder (34) is fixed on the movable frame (2) by the cylinder body, and the moving end of the piston rod of the shearing hydraulic cylinder (34) is connected to the pull rod (31); There are at least two sets of transmission mechanisms (35). Each set of transmission mechanisms (35) includes a vertical rod (351) and two connecting rods (352). Each set of transmission mechanisms (35) is arranged on the pull rod (31) in sequence as follows: the upper part of the vertical rod (351) is fixed on the movable frame (2) in sequence, the inner ends of the two connecting rods (352) are rotatably connected to the pull rod (31) through pins, the outer end of one connecting rod (352) is rotatably connected to the top of the vertical rod (351) through pins, and the outer end of the other connecting rod (352) is rotatably connected to the shearing blade holder (32) through pins. The fixed blade holder (36) is fixed inside the movable frame (2) and located below the shearing blade holder (32); When the piston rod of the shearing hydraulic cylinder (34) extends or retracts, the traction rod (31) moves horizontally, and then drives the shearing blade holder (32) and shearing blade (33) to move vertically through the transmission mechanism (35). The clamping assembly (4) includes two clamping rollers (41), a clamping hydraulic cylinder (43), and a feeding flap (44). The two clamping rollers (41) are rotatably mounted on one side of the fixed frame (1). The outer sides of the two clamping rollers (41) face each other and are arranged vertically. One of the clamping rollers (41) is driven to rotate by a drive motor. The outer sides of the two clamping rollers (41) are connected to a conveying channel (42). The conveying channel (42) faces the shearing blade of the shearing knife (33). The cylinder body of the clamping hydraulic cylinder (43) is fixed on the fixed frame (1). The moving end of the piston rod of the clamping hydraulic cylinder (43) is connected to the clamping roller (41) located above. One end of the feeding flap (44) is rotatably mounted on the fixed frame (1). The other end of the feeding flap (44) extends into the movable frame (2) and is also connected to the moving end of the piston rod of the clamping hydraulic cylinder (43).

2. The double-layer hydraulic cross-cutting shear with connecting rod capable of feeding tail material and clamping to a fixed length as described in claim 1, characterized in that: The shearing assembly (3) also includes detection gratings (37), and two detection gratings (37) are arranged in sequence in front of the conveying channel (42); the drive motor of the pinch roller (41) is equipped with an encoder.

3. The double-layer hydraulic cross-cutting shear with connecting rod capable of feeding tail material and clamping to a fixed length as described in claim 2, characterized in that: The number of shearing components (3) and clamping components (4) are equal and there are at least two of each.

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