A synchronous following type clamp cutting shear

Abstract

The application discloses a synchronous following type clamp cutting shear, which comprises a rack, two sets of symmetrical shearing assemblies arranged on the rack, an upper knife seat and a lower knife seat, a driving assembly arranged above the upper knife seat, gears fixedly connected to the upper knife seat and the lower knife seat and meshing with each other for driving the upper knife seat and the lower knife seat to synchronously and oppositely rotate, blades fixedly connected to the upper knife seat and the lower knife seat and capable of cooperating with each other for shearing a rolled piece, a limiting assembly arranged on the upper side of the rack near a rolled piece outlet, and a base on which the rack rotates to drive the rolled piece to follow and stably run along a rolling line, so that defects, such as unevenness and skewness of a sheared opening, caused by support instability are eliminated.

Description

Technical Field

[0001] This invention belongs to the field of metal rolling technology, and specifically relates to a synchronous following type snap-cut shear. Background Technology

[0002] On high-speed wire rod production lines, shear cutters are typically positioned in front of the rolling mill. During production, in the event of a steel pile-up accident, the shear cutters immediately activate, quickly cutting the rolled piece to prevent harm to the surrounding environment and personnel. Currently, the shear cutters still in use in these projects have poor continuous impact resistance, insufficient overall stability, and are inconvenient to install and maintain.

[0003] To address the aforementioned issues, Chinese invention patent application number 201710108237.5 discloses a swing-arm independent double-tie-rod snap-cut shear, comprising a snap-cut shear support, a cylinder, and a detection and control unit. The cylinder is mounted on a cylinder support, which is connected to the snap-cut shear support. The snap-cut shear support has an upper crankshaft and a lower crankshaft on its side. The upper crankshaft is connected to the snap-cut shear support via the upper crankshaft, and the lower crankshaft is connected to the snap-cut shear support via the lower crankshaft. The upper crankshaft is connected to an upper shear blade, and the lower crankshaft is connected to a lower shear blade. The upper crankshaft is connected to one end of an upper independent swing arm, and the lower crankshaft is connected to one end of a lower independent swing arm. The other ends of the upper and lower independent swing arms are respectively hinged to adjustable tie rods. The upper and lower independent swing arms and the adjustable tie rods are symmetrically arranged on both sides of the snap-cut shear support. This independent double-lever shear has high shearing stiffness, large shearing force, good continuous impact resistance, strong overall stability, and is easy to install and maintain.

[0004] However, this shear has a linkage synchronous structure, which has the following drawbacks: adjusting the synchronization of the two blades is difficult and time-consuming. Often, the two blades do not mesh synchronously, resulting in a slanted and uneven cross-section of the steel billet after shearing, which is not conducive to the meshing of the subsequent rolling mill rolls. In addition, the frame of this shear is fixedly set, and it cannot run smoothly with the rolling line when the cutter is shearing the rolled workpiece. It is easy to lose stability of the support, resulting in uneven cuts and skewed cuts of the rolled workpiece. Summary of the Invention

[0005] This invention provides a synchronous following snap-cut shear, which aims to solve the problems of existing snap-cut shears where adjusting the blades is difficult and time-consuming, and the blades cannot run smoothly along the rolling line when shearing rolled parts.

[0006] To solve the above-mentioned technical problems, the present invention adopts the following technical solution:

[0007] A synchronous following shear includes: a frame, the bottom two sides of which are rotatably connected to a base via first pins, the base being fixedly connected to a rolling mill; two sets of symmetrical shearing assemblies are provided on the frame; each shearing assembly further includes: an upper blade holder and a lower blade holder, both of which are rotatably connected to the frame via second pins; a drive assembly is provided above the upper blade holder, which drives the upper blade holder to rotate around the second pins; gears are fixedly connected to the sides of the upper and lower blade holders near the frame sidewall, and the two gears mesh with each other to drive the upper and lower blade holders to rotate synchronously relative to each other; blades are fixedly connected to the sides of the upper and lower blade holders near the workpiece inlet, and the two blades can cooperate to shear the workpiece; the drive assembly is fixedly connected to the frame; a limit assembly is provided on the upper part of the side of the frame near the workpiece outlet, which limits the rotation of the frame.

[0008] Furthermore, the drive assembly further includes: a cylinder, the piston rod of the cylinder being fixedly connected to a connector, the connector being rotatably connected to an upper tool holder, a fixing ring being sleeved on the outside of the cylinder, the fixing ring being fixedly connected to a mounting base, the mounting base being fixedly connected to the upper part of the frame, and the cylinder being connected to an air pipe and a control box.

[0009] Furthermore, the limiting component further includes: a first channel steel and a second channel steel, the first channel steel being fixedly connected to the upper part of the side of the frame near the outlet of the rolled product, the second channel steel being fixedly connected to the rolling mill, and the first channel steel and the second channel steel being fastened together to limit the rotation of the frame.

[0010] Furthermore, a support platform is provided inside the frame. The support platform is fixedly connected to the frame and is located between two gears fixed to the lower blade holder in the two sets of shearing assemblies. The support platform is used to support the cut rolled piece.

[0011] Furthermore, when the blades on the lower blade holder and the upper blade holder engage, the two blades are coplanar near the sidewalls of the workpiece inlet.

[0012] Furthermore, the blade is bolted to both the lower and upper tool holders.

[0013] Compared with the prior art, the present invention has the following technical effects:

[0014] 1. The synchronous following card cutting shear of the present invention is set by rotating the frame and the base. During the process of the blade cutting the rolled workpiece, the frame moves with the rolled workpiece, which can protect the position of the rolled workpiece relative to the blade edge and prevent it from deviating. It also plays a role in strengthening the support of the rolled workpiece, making the cut of the rolled workpiece flat and smooth, and reducing the occurrence of defects such as forking at the tail of the subsequent rolled workpiece.

[0015] 2. The synchronous following cutter shear described in this invention adopts a gear transmission method, which makes the rotation synchronization of the upper and lower cutter holders better. The opening and closing of the two blades is driven by a pair of meshing gears. As long as the blade gap is adjusted in the closed state, it can be ensured that the two blades open and close synchronously with the rotation of the gears. In this way, the cross-section of the rolled piece after shearing is flatter, and it is also easy to adjust and maintain.

[0016] 3. The synchronous following card cutter of the present invention, through the setting of the drive component, has a fixed ring sleeved on the outside of the cylinder in the drive component. The fixed ring is fixedly connected to the mounting base, and the mounting base is fixedly connected to the upper part of the frame. When adjusting the card cutter, the operator can adjust the degree of blade engagement by adjusting the relative position of the cylinder and the fixed ring, which is convenient and quick.

[0017] 4. The synchronous following clamp-and-cut shear described in this invention restricts the rotation of the frame by setting a limiting component, which can avoid excessive angular deviation of the frame during the shearing process, thereby ensuring the safety of the clamp-and-cut shear during the shearing process. The limiting component adopts a channel steel fastening method, which has a simple structure, is easy to maintain and replace, and improves the maintainability of the equipment.

[0018] 5. The synchronous following cutter shear described in this invention uses bolts to connect the blade to both the lower and upper blade holders, which facilitates blade replacement and adjustment, effectively saves maintenance time, and ensures production efficiency.

[0019] 6. In the synchronous following cutter shear of the present invention, when the blades on the lower blade holder and the upper blade holder mesh, the two blades are coplanarly arranged on the side wall near the inlet side of the rolled piece, which can ensure that the position and angle of the blades are relatively stable, thereby improving the shearing accuracy. Since the position and angle of the blades are relatively stable, the deformation of the rolled piece during the shearing process can be reduced, thereby ensuring the cut quality of the rolled piece after shearing. Attached Figure Description

[0020] Figure 1 This is a front view of a synchronous following card-cutting shear as described in this invention;

[0021] Figure 2 This is a schematic diagram of the blade opening state of a synchronous following snap-cutting shear as described in this invention;

[0022] Figure 3 This is a schematic diagram of the blade engagement state of a synchronous following snap-cutting shear as described in this invention.

[0023] In the diagram: 1. Frame; 2. Base; 3. First pin; 4. Lower tool holder; 5. Upper tool holder; 6. Gear; 7. Blade; 8. Connector; 9. Piston rod; 10. Mounting seat; 11. Cylinder; 12. Support platform; 13. Fixing ring; 14. Second pin; 15. First channel steel; 16. Second channel steel. Detailed Implementation

[0024] To make the objectives, technical solutions, and advantages of the present invention clearer, the technical solutions of the present invention will be clearly and completely described below in conjunction with specific embodiments of the present application and with reference to the accompanying drawings.

[0025] like Figure 1-3 As shown, a synchronous following shear includes: a frame 1, the bottom sides of which are rotatably connected to a base 2 via first pins 3, the base 2 being fixedly connected to a rolling mill; two sets of symmetrical shearing assemblies are provided on the frame 1; each shearing assembly further includes: an upper blade holder 5 and a lower blade holder 4, both of which are rotatably connected to the frame 1 via second pins 14; a driving assembly is provided above the upper blade holder 5, the driving assembly being used to drive the upper blade holder 5 around the second pins 14. The center rotates, and gears 6 are fixedly connected to the side of the upper cutter holder 5 and the lower cutter holder 4 near the side wall of the frame 1. The two gears 6 mesh with each other to drive the upper cutter holder 5 and the lower cutter holder 4 to rotate synchronously relative to each other. Blades 7 are fixedly connected to the side of the upper cutter holder 5 and the lower cutter holder 4 near the workpiece inlet. The two blades 7 can cooperate with each other to shear the workpiece. The drive assembly is fixedly connected to the frame 1. A limit assembly is provided on the upper part of the side of the frame 1 near the workpiece outlet. The limit assembly is used to limit the rotation of the frame 1.

[0026] like Figure 1-3 As shown, the drive assembly further includes: a cylinder 11, with a connector 8 fixedly connected to the end of the piston rod 9 of the cylinder 11, the connector 8 being rotatably connected to the upper tool holder 5, a fixing ring 13 being sleeved on the outside of the cylinder 11, the fixing ring 13 being fixedly connected to the mounting base 10, the mounting base 10 being fixedly connected to the upper part of the frame 1, and the cylinder 11 being connected to an air pipe and a control box.

[0027] like Figure 1-3 As shown, the limiting component further includes: a first channel steel 15 and a second channel steel 16. The first channel steel 15 is fixedly connected to the upper part of the side of the frame 1 near the outlet of the rolled product, and the second channel steel 16 is fixedly connected to the rolling mill. The first channel steel 15 and the second channel steel 16 are fastened together to limit the rotation of the frame 1.

[0028] like Figure 1-3As shown, a support platform 12 is provided inside the frame 1. The support platform 12 is fixedly connected to the frame 1. The support platform 12 is located between two gears 6 that are fixed to the lower blade holder 4 in the two sets of shearing assemblies. The support platform 12 is used to support the rolled piece after shearing.

[0029] like Figure 3 As shown, when the lower cutter holder 4 and the cutter 7 on the upper cutter holder 5 are engaged, the two cutters 7 are coplanar near the sidewalls of the workpiece inlet.

[0030] like Figure 1-3 As shown, the blade 7 is connected to both the lower blade holder 4 and the upper blade holder 5 by bolts.

[0031] Working principle: First, the operator installs the base 2 of the synchronous following shear and the second channel steel 16 in the appropriate position of the rolling mill, and connects the cylinder 11 to the air pipe and the rolling mill control system. When the downstream rolling mill fails, the rolling mill control system controls the cylinder 11 to move. This synchronous following shear has two sets of shearing components, which can meet the needs of dual-channel or single-channel rolling mills.

[0032] Specific shearing process: After the synchronous following clamp shear is installed, its initial position is towards the workpiece inlet due to the limitation of the limiting component. The preferred tilt angle is towards the workpiece inlet and forms a 15° angle with the vertical direction. When a fault occurs in the downstream mill, the mill control system activates cylinder 11, extending the piston rod 9 and causing the upper cutter holder 5 to rotate downwards. The gear 6 on the upper cutter holder 5 drives the gear 6 on the lower cutter holder 4 to rotate, thus causing the lower cutter holder 4 to rotate upwards. The blades 7 on the two cutter holders begin to mesh. When one blade 7 contacts the workpiece first, the frame 1 begins to rotate due to the force between the first contacting blade 7 and the workpiece, until the other blade 7 also contacts the workpiece. At this point, the frame 1 stops rotating, and the piston rod 9 of cylinder 11 continues to extend downwards. The two blades 7 then begin to cut into the workpiece. As the workpiece continues to move forward, it applies an axial force to the blades 7. The initial cutting angle of the blade 7 is approximately [angle not specified] with the direction of the workpiece's movement. The obtuse angle allows the axial force to be converted into a tangential force between the blade 7 and the workpiece. Simultaneously, the frame 1 continues to rotate in the direction of workpiece travel under the influence of this tangential force. As the workpiece travels, the frame 1 rotates smoothly along the first pin on the base 2, driving the workpiece to continue running smoothly along the rolling line until the rear sides of the first channel steel 15 and the second channel steel 16 abut against each other, restricting the frame 1 from continuing to rotate. The preferred tilt angle is tilted towards the workpiece exit direction and forms a 10° angle with the vertical direction. During this process, the piston rod 9 of the cylinder 11 extends downward continuously, causing the upper and lower blades 7 to continuously approach each other until the upper and lower blades 7 abut against each other. When the two blades 7 abut against each other, the shearing of the workpiece is completed, and subsequent workpieces can be blocked by the blades 7. During the entire shearing process, from the blade 7 cutting into the workpiece to the completion of the shearing, the frame 1 rotates from the right limit position to the left limit position under the restriction of the limiting component. The cutting entry of the blade 7 moves synchronously with the direction of workpiece travel due to the movement of the frame 1.

[0033] Once the downstream mill malfunction is resolved, the control system retracts the control cylinder 11, causing the upper cutter holder 5 to rotate upwards. Simultaneously, the gear 6 drives the lower cutter holder 4 to rotate downwards, and the two blades 7 open synchronously, completing the release of the rolled piece. After the rolled piece is released, the staff adjusts the angle of the shearing cutter to the initial position to await the next shearing operation.

[0034] Meanwhile, during the shearing process of the cut-off shear, the rotation of the frame 1 can also alleviate the impact of the rolled workpiece on the blade 7, protect the blade 7, and prevent the blade 7 from being damaged by excessive impact load.

[0035] The above description is only a preferred embodiment of the present invention. It should be noted that those skilled in the art can make several modifications and improvements without departing from the inventive concept of the present invention, and these all fall within the protection scope of the present invention.

Claims

1. A synchronous following card-cutting shear, characterized in that, include: A frame (1) is provided with two symmetrical shearing assemblies on its bottom sides via first pins (3). The base (2) is used to fix the frame (1) to the rolling mill. The shearing assemblies further include an upper blade holder (5) and a lower blade holder (4). Both the upper blade holder (5) and the lower blade holder (4) are rotatably connected to the frame (1) via second pins (14). A drive assembly is provided above the upper blade holder (5). The drive assembly is used to drive the upper blade holder (5) to rotate around the second pin (14). Gears (6) are fixedly connected to the side of the upper blade holder (5) and the lower blade holder (4) near the side wall of the frame (1), and the two gears (6) are mutually symmetrical. The intermeshing mechanism is used to drive the upper cutter holder (5) and the lower cutter holder (4) to rotate synchronously relative to each other. Both the upper cutter holder (5) and the lower cutter holder (4) are fixedly connected with blades (7) near the workpiece inlet. The two blades (7) can cooperate with each other to shear the workpiece. The drive assembly is fixedly connected to the frame (1). The upper part of the frame (1) near the workpiece outlet is provided with a limit assembly. The limit assembly is used to limit the rotation of the frame (1). The initial position of the shear is towards the workpiece inlet due to the limitation of the limit assembly. When a blade (7) contacts the workpiece first, the frame (1) starts to rotate due to the force between the first contacting blade (7) and the workpiece, until the other blade (7) also contacts the workpiece and then stops rotating.

2. The synchronous following card-cutting shear according to claim 1, characterized in that, The drive assembly further includes: a cylinder (11), the piston rod (9) of the cylinder (11) is fixedly connected to a connector (8) at the end, the connector (8) is rotatably connected to the upper tool holder (5), a fixing ring (13) is sleeved on the outside of the cylinder (11), the fixing ring (13) is fixedly connected to the mounting seat (10), the mounting seat (10) is fixedly connected to the upper part of the frame (1), and the cylinder (11) is connected to an air pipe and a control box.

3. The synchronous following card-cutting shear according to claim 2, characterized in that, The limiting component further includes: a first channel steel (15) and a second channel steel (16), wherein the first channel steel (15) is fixedly connected to the upper part of the side of the frame (1) near the outlet of the rolled product, and the second channel steel (16) is fixedly connected to the rolling mill, and the first channel steel (15) and the second channel steel (16) are fastened together to limit the rotation of the frame (1).

4. The synchronous following card-cutting shear according to claim 3, characterized in that, The frame (1) is provided with a support platform (12) inside. The support platform (12) is fixedly connected to the frame (1). The support platform (12) is located between two gears (6) fixed to the lower blade holder (4) in the two sets of shearing assemblies. The support platform (12) is used to support the rolled piece after shearing.

5. A synchronous following card-cutting shear according to claim 4, characterized in that, When the lower cutter holder (4) engages with the blade (7) on the upper cutter holder (5), the two blades (7) are coplanar near the side wall of the workpiece inlet.

6. A synchronous following card-cutting shear according to claim 5, characterized in that, The blade (7) is connected to the lower tool holder (4) and the upper tool holder (5) by bolts.

Images