Thick-specification plate strip shearing device

Abstract

A thick-specification plate strip shearing device comprises an upper knife and a lower knife, the upper knife comprises an upper knife rest and an upper knife edge, the lower knife comprises a lower knife rest and a lower knife edge, the upper knife edge is arranged at the bottom of the upper knife rest, one end of the upper knife edge is high, the other opposite end of the upper knife edge is low, and a cutting edge of the upper knife edge is inclined; a lower cutting edge is arranged on the top of the lower knife rest, and the cutting edge of the lower cutting edge is horizontal. The herringbone shears can solve the problems that triangular marks are formed on a plate surface after the existing herringbone shears are sheared and the shearing force is insufficient when thick blanks are sheared.

Description

Technical Field

[0001] The utility model belongs to the field of metal strip processing, and particularly relates to a shearing device for thick gauge strip materials. Background Art

[0002] When the slab on the hot rolling mill is rolled to a certain thickness, it is necessary to use a heavy hydraulic crop shear to cut off the irregular heads and tails of the strip, so as to facilitate the smooth progress of the next rolling step. According to the shearing method, the flat blade shear can be divided into three types: the up-cut shear, the down-cut shear, and the horizontal shear. For the down-cut shear, the shearing process is achieved by the rapid descent of the upper shear blade to a certain position and then the ascent of the lower shear blade. The upper shear blade is a herringbone shear, which is installed by butting 2 pieces of shear blades. Each shear blade is inclined, and the inclination angle is 3°. The inclination directions of the two shear blades are opposite, thus forming a herringbone shape with a high middle and low ends.

[0003] The following problems exist in the herringbone shear during shearing: 1. There is a bulging protrusion in the middle of the billet after shearing. When the billet is bitten into the rolling mill and impacts the rolling mill, a triangular indentation will be left on the plate surface; 2. When the length of the ingot is greater than 5300 mm or the ingot is relatively thick and is rolled to a certain thickness (such as about 120 mm), there is still a phenomenon that it cannot be sheared during shearing, which is manifested as insufficient shearing force. At this time, if it is rolled thinner and then sheared, there will be a situation where the length of the roller table is insufficient and it is difficult to accommodate the length of the thin material. Content of the Utility Model

[0004] The purpose of the utility model is to provide a shearing device for thick gauge strip materials to solve the problems of triangular indentations on the plate surface after shearing by the existing herringbone shear and insufficient shearing force when shearing thick gauge billets.

[0005] In order to achieve the above purpose, the technical solution adopted by the utility model is: a shearing device for thick gauge strip materials, including an upper knife and a lower knife. The upper knife includes an upper knife holder and an upper knife edge. The lower knife includes a lower knife holder and a lower knife edge. The bottom of the upper knife holder is provided with the upper knife edge. One end of the upper knife edge is at a high position and the opposite end is at a low position, so that the edge of the upper knife edge is inclined. The top of the lower knife holder is provided with a lower knife edge, and the edge of the lower knife edge is horizontal.

[0006] A fixed sleeve is arranged at each end of the upper knife holder. The fixed sleeve is fixedly sleeved on the top of a column. The bottom of the column is fixedly connected with a lower cross beam. The two ends of the lower knife holder are slidably connected to the two columns. A plurality of hydraulic cylinders are arranged between the lower knife holder and the lower cross beam. An upper limit block that can abut against the top end of the frame is arranged on the fixed sleeve. Lower limit blocks that can abut against the frame are arranged at both ends of the lower knife holder.

[0007] An upper support boss for supporting the upper limit block is arranged at the top end of the frame.

[0008] A lower support boss is arranged in the middle of the frame for supporting the lower limit block.

[0009] Both ends of the lower tool rest are slidably connected to the two columns through sliding sleeves.

[0010] The hydraulic cylinder includes a rapid lifting cylinder and a shearing main cylinder. The cylinder body of the rapid lifting cylinder is fixed on the lower cross beam, and the piston rod of the rapid lifting cylinder is connected to the lower tool rest; the cylinder body of the shearing main cylinder is fixed on the lower cross beam, and the piston rod of the shearing main cylinder is connected to the lower tool rest.

[0011] A hinge seat is arranged at the bottom of the lower tool rest, and the piston rod of the rapid lifting cylinder is connected to the hinge seat.

[0012] There are two rapid lifting cylinders and two shearing main cylinders. The two shearing main cylinders are located between the two rapid lifting cylinders.

[0013] The beneficial effects of the present utility model are as follows: The upper cutting edge of the present utility model is arranged in an inclined "one" shape, with one end high and the opposite end low. This can avoid leaving triangular imprints on the strip material during shearing, and can provide sufficient shearing force when shearing medium and thick strip materials, avoiding the phenomenon of inability to cut. Description of the Drawings

[0014] Figure 1 is a schematic structural view of the present utility model;

[0015] Figure 2 is a schematic structural view of the upper tool of the present utility model;

[0016] Markings in the figure: 1, frame; 2, upper tool rest; 3, upper cutting edge; 4, fixed sleeve; 5, upper support boss; 6, column; 7, sliding sleeve; 8, lower cutting edge; 9, lower tool rest; 10, lower limit block; 11, lower support boss; 12, lower cross beam; 13, foundation pit; 14, rapid lifting and lowering cylinder; 15, shearing main cylinder; 16, upper limit block. Detailed Embodiments

[0017] The present utility model will be further described in detail below with reference to the drawings and embodiments, but it is not used as a basis for any limitation of the utility model.

[0018] As shown in the accompanying drawings, a shearing device for thick gauge strip includes a frame 1, an upper knife, a lower knife, and a hydraulic cylinder. The frame 1 is fixed on the ground on both sides of the foundation pit 13. The upper knife, the lower knife, and the hydraulic cylinder are all installed on the frame 1, and the upper knife and the lower knife are arranged opposite to each other vertically. Columns 6 are provided on both sides of the frame 1, and the columns 6 are arranged vertically. The lower parts of the columns 6 on both sides are fixedly connected to the lower cross beam 12 on the frame 1. The upper knife includes an upper knife holder 2 and an upper knife edge 3. Fixed sleeves 4 are provided on both sides of the upper knife holder 2. The fixed sleeves 4 are sleeved and fixed on the columns 6. An upper limit block 16 is provided on the side of the fixed sleeve 4, and the upper limit block 16 can support on the upper support boss 5 at the top of the frame 1. The upper knife edge 3 is inclinedly installed at the bottom of the upper knife holder 2. One end of the upper knife edge 3 is high and the other end is low, so that the cutting edge is inclined. In this embodiment, the inclination angle of the cutting edge of the upper knife edge 3 is 3°. The lower knife includes a lower knife holder 9 and a lower knife edge 8. Sliding sleeves 7 are provided on both sides of the lower knife holder 9. The sliding sleeves 7 are slidably sleeved on the columns 6. A lower limit block 10 is provided at the bottom of the sliding sleeve 7. A lower support boss 11 that can support the lower limit block 10 is provided inside the frame 1. The lower knife edge 8 is fixed to the upper end of the lower knife holder 9. The hydraulic cylinder includes a fast lifting cylinder 14 and a shearing main cylinder 15. There are two fast lifting cylinders 14, which are symmetrically distributed about the center line of the lower knife holder 9 at both ends of the lower knife holder 9. The cylinder body of the fast lifting cylinder 14 is fixed inside the lower cross beam 12, and the piston rod of the fast lifting cylinder 14 is connected to the bottom of the lower knife holder 9. There are two shearing main cylinders 15, which are symmetrically distributed about the center line of the lower knife holder 9 between the two fast lifting cylinders 14. The cylinder body of the shearing main cylinder 15 is fixed inside the lower cross beam 12, and the piston rod of the shearing main cylinder 15 abuts against the bottom end of the lower knife holder 9. The shearing main cylinder 15 is a plunger cylinder.

[0019] Further, a hinge seat is provided at the bottom of the lower knife holder 9, and the piston rod of the fast lifting cylinder 14 is connected to the hinge seat.

[0020] When the present utility model is in use, the piston rod of the fast lifting cylinder 14 extends, but the thrust generated is not sufficient to push the lower knife holder 9 to rise. Therefore, the cylinder body of the fast lifting cylinder 14 descends, pushing the lower cross beam 12 to drive the column 6 and the upper knife holder 2 to descend until the upper limit block 16 on the upper knife holder 2 supports on the upper support boss 5 at the top of the frame; then the shearing main cylinder 15 is filled with oil to jack up the lower knife holder 9 and perform head and tail shearing on the strip.

[0021] The above embodiments are only used to illustrate the technical solutions of the present invention rather than to limit it. Those of ordinary skill in the art should understand that the specific implementation manners of the present invention can be modified or equivalently replaced by referring to the above embodiments. Any modification or equivalent replacement that does not depart from the spirit and scope of the present invention is within the protection scope of the claims pending for approval.

Claims

1. A thick plate and strip shearing device, comprising an upper knife and a lower knife, wherein the upper knife comprises an upper knife holder and an upper blade, and the lower knife comprises a lower knife holder and a lower blade, characterized in that: The upper blade is arranged at the bottom of the upper blade holder, one end of the upper blade is high and the other end is low, so that the edge of the upper blade is inclined; the lower blade is arranged at the top of the lower blade holder, and the edge of the lower blade is horizontal.

2. The thick plate and strip shearing device according to claim 1 is characterized in that: A fixing sleeve is respectively arranged at both ends of the upper tool holder, and the fixing sleeve is arranged on the top of a column, and a lower cross beam is fixedly connected to the bottom of the column, and the two ends of the lower tool holder are slidably connected to the two columns, and a plurality of hydraulic cylinders are arranged between the lower tool holder and the lower cross beam; an upper limit block capable of supporting the top of the frame is arranged on the fixing sleeve, and lower limit blocks capable of supporting the frame are arranged at both ends of the lower tool holder.

3. The thick plate and strip shearing device according to claim 2 is characterized in that: An upper supporting boss is arranged on the top of the frame for supporting the upper limit block.

4. The thick plate and strip shearing device according to claim 2 is characterized in that: A lower supporting boss is arranged in the middle of the frame for supporting the lower limit block.

5. The thick plate and strip shearing device according to claim 2 is characterized in that: The two ends of the lower tool holder are slidably connected to the two columns through sliding sleeves.

6. The thick plate and strip shearing device according to claim 2 is characterized in that: The hydraulic cylinder includes a quick lifting cylinder and a shearing main oil cylinder, the cylinder body of the quick lifting cylinder is fixed on the lower cross beam, and the piston rod of the quick lifting cylinder is connected to the lower tool holder; the cylinder body of the shearing main oil cylinder is fixed on the lower cross beam, and the piston rod of the shearing main oil cylinder is connected to the lower tool holder.

7. The thick plate and strip shearing device according to claim 6 is characterized in that: A hinged seat is arranged at the bottom of the lower tool holder, and the piston rod of the quick lifting cylinder is connected to the hinged seat.

8. The thick plate and strip shearing device according to claim 6 is characterized in that: The fast lifting cylinders are provided with two, the shearing master oil cylinders are provided with two, and the two shearing master oil cylinders are located between the two fast lifting cylinders.

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