Scrap steel shearing machine with high safety
Through the automatic feeding design of hydraulic cylinder drive blocks and shear knives, rear and front baffles and gear transmission, the problems of manual material push and residue safety hazards of existing scrap steel shear machines are solved, and automated shearing and safety are achieved promote.
Patent Information
- Application Number
- CN202411505516.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2024-10-28
- Publication Date
- 2025-01-07
- Estimated Expiration
- Not applicable · inactive patent
AI Technical Summary
Existing scrap steel shearing machines require manual material push when in use, which poses safety hazards. Scrap steel plates with high brittleness are prone to breaking locally during shearing, resulting in personal safety risks.
A high-safe scrap steel shearing machine is designed, using hydraulic cylinder-driven chunks and shear knives for automatic shearing, equipped with a rear cover and front baffle to prevent residue from popping out, and pushing the table to automatically feed through gear transmission. and teleport, increasing surface roughness to prevent residue from popping out.
Automatic shearing is achieved, reducing labor demand, reducing the risk of staff being crushed, and effectively preventing the residue of brittle scrap steel from popping out through the design of the baffle and push table, improving safety.
Smart Images
Figure CN119260058A_ABST
Abstract
Description
Technical Field
[0001] The invention belongs to the technical field of scrap steel recycling, and in particular relates to a scrap steel shearing machine with high safety. Background Art
[0002] Scrap steel shears are mainly used to shear scrap steel so that it can be converted into scrap steel bars, blocks and other shapes that meet specific requirements, which is convenient for subsequent transportation, recycling or reuse. It is widely used in steel mills, construction sites, scrap metal recycling stations and other places. It has the advantages of high mechanization, high operating efficiency and low loss. There are many types of scrap steel shears, such as gantry shears, crocodile shears, etc. Each type has its unique characteristics and scope of application.
[0003] The current scrap steel cutting equipment used for sheet steel requires manual pushing of materials during use. The amount pushed out is what is cut. Not only does the cutting work consume a lot of manpower, but the workers may be injured by the front-end pressing mechanism if they are not careful. In addition, some scrap steel plates are more brittle and are prone to partial fracture during shearing, emitting metal residues, posing a hidden danger to the personal safety of the workers. Summary of the invention
[0004] The purpose of the present invention is to provide a scrap steel shearing machine with high safety for existing devices, so as to solve the problems raised in the above background technology.
[0005] In order to solve the above technical problems, the present invention provides the following technical solutions: a scrap steel shearing machine with high safety, comprising a main platform, side plates are welded on both sides above the main platform, a top plate is also welded above the two side plates, a second hydraulic cylinder is fixedly arranged on the top plate, the output end of the second hydraulic cylinder passes through the top plate and is fixedly connected with a pressure block, a first hydraulic cylinder is also fixedly arranged on the top plate, the first hydraulic cylinder is located behind the second hydraulic cylinder, the output end of the first hydraulic cylinder passes through the top plate and is fixedly connected with a shearing knife, the pressure block is driven to rise and fall by the output end of the second hydraulic cylinder to realize the material pressing work when shearing the sheet-like scrap steel, and the shearing knife is driven to rise and fall by the output end of the first hydraulic cylinder to realize the shearing work of the sheet-like scrap steel; A motor frame is welded on one side of the mainframe, a motor is fixedly installed inside the motor frame, a coupling is connected to the output end of the motor, a transmission shaft is connected to the other end of the coupling, the transmission shaft passes through the left and right sides of the mainframe, a number of gears are evenly sleeved on the transmission shaft located inside the mainframe, a gear ring is meshed and connected to the outer side of each gear, a connecting section is welded above each gear ring, a push platform is welded above each connecting section, a avoidance groove is opened at a position on the mainframe corresponding to the push platform, and the The avoidance groove leaves an avoidance space for the sliding of the pushing platform. A sliding point is glued on one side of the pushing platform. A sliding groove is opened at a position corresponding to the sliding point in the avoidance groove. The motor is used as a power source, and the gear is driven to rotate through the coupling and the transmission shaft. The gear and the gear ring are meshed for transmission. The sliding point fixedly connected relative to the gear ring slides up, right, down, and left in the sliding groove in sequence for guidance, so that the gear ring drives the pushing platform to move in the avoidance groove in sequence in the upward, backward, downward, and forward directions relative to the gear.
[0006] The present invention further illustrates that a blanking edge is provided at the rear of the main machine, and the blanking edge is conducive to better blanking of the scrap steel after shearing. A rear baffle cover is welded at the rear of the top plate, and the rear baffle cover is conducive to blocking the metal residues that pop out of some brittle scrap steel due to local fracture, thereby preventing safety accidents caused by the popping out.
[0007] The present invention further illustrates that a front baffle is also provided on the top plate, the front baffle is a T-shaped structure, and the height of the front baffle is slightly larger than the difference between the distance between the lower surface of the top plate and the upper surface of the main unit and the thickness of the pressure block, the lower end of the front baffle is plugged into the pressure block, and when the pressure block descends, the front baffle descends accordingly, and when the pressure block presses the scrap steel, the front baffle blocks the front side of the scrap steel shearing work, and is used to prevent some brittle scrap steel from partially breaking and popping out metal residues, thereby preventing the residues from popping out and injuring people.
[0008] The present invention further illustrates that a plurality of straight long grooves are evenly arranged on the upper surface of the main machine platform, and the straight long grooves are beneficial to causing a slight deformation of the lower surface of the sheet-like scrap steel when the pressing block is pressing the material, thereby improving the roughness of the surface of the sheet-like scrap steel. A plurality of circular blind grooves are arranged at the bottom of each of the straight long grooves, and a spring is arranged in each of the circular blind grooves. A top sheet is glued on the top of each of the springs. When the spring is naturally stretched, the top sheet is lifted to a level slightly higher than the upper surface of the main machine platform, which is beneficial to the removal of the sheet-like scrap steel after the pressing block is pressing the material.
[0009] The present invention further illustrates that the lower structure of the pressing block is an uneven convex rough bottom surface, which is beneficial to increase the surface roughness of the flake scrap steel when pressing the material.
[0010] The present invention further illustrates that the top surface of the pushing platform is set as an uneven rough top surface, which is conducive to increasing the friction between the two when the sheet-like scrap steel is driven by the pushing platform for transmission, thereby ensuring the smooth progress of the feeding work.
[0011] The present invention further describes that the method for moving the gear ring relative to the gear includes: When the motor is started, the transmission shaft is driven to rotate through the coupling, and the gear rotates around the transmission shaft. Since the gear ring is connected to the pushing platform through the connecting section, the movement trajectory of the sliding point on the pushing platform in the sliding groove corresponds to the movement trajectory of the gear ring relative to the gear. That is, the sliding point is limited by sliding up, right, down, and left in the sliding groove in sequence, and the gear ring realizes movement in the upward, backward, downward, and forward directions in sequence through the meshing and rotating gear.
[0012] The present invention further illustrates that the conveying work of the push platform on the flake scrap steel also includes the following method: Due to the meshing transmission of the gear and the gear ring, the pushing platform is driven to move up, backward, down and forward in the avoidance groove in sequence, so as to realize the upward support of the scrap steel sheet, backward transmission, downward retraction, forward return and then repeat the above actions in sequence until the scrap steel sheet is transported to a suitable shearing position, the output end of the second hydraulic cylinder extends, driving the pressure block to press on the scrap steel sheet below, and then the first hydraulic cylinder extends, driving the shearing knife to shear the scrap steel sheet, and then the second hydraulic cylinder and the first hydraulic cylinder are both retracted upward to the initial position, and then the scrap steel sheet is continued to be transported backward by the pushing platform, and the shearing work of each section is completed in sequence.
[0013] Compared with the prior art, the beneficial effects achieved by the present invention are: 1. By providing the motor as a power source, the coupling and the transmission shaft drive the gear to rotate, the gear and the gear ring are meshed for transmission, and the sliding point fixedly connected to the gear ring slides upward, right, downward, and left in the sliding groove in sequence for guidance, so that the gear ring drives the push platform to realize upward support, backward transmission, and downward retraction in the avoidance groove in sequence relative to the gear, so that the push platform can automatically transmit the sheet-like scrap steel, which saves manpower and reduces the risk of workers being crushed by the pressing mechanism when manually feeding materials; 2. The rear baffle and the front baffle are provided to help block metal residues that may pop out when some brittle scrap steel breaks partially during scrap steel shearing, thereby preventing safety accidents caused by such popping out. BRIEF DESCRIPTION OF THE DRAWINGS
[0014] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation of the present invention. In the accompanying drawings: Figure 1 It is a schematic diagram of the overall structure of an embodiment of the present invention; Figure 2 is an enlarged view of region A of an embodiment of the present invention; Figure 3 is a schematic diagram of an internal gear transmission structure of an embodiment of the present invention; Figure 4 is an enlarged view of region B of an embodiment of the present invention; Figure 5 It is a schematic diagram of the structure of a push platform portion of an embodiment of the present invention; Figure 6 is a schematic diagram of the movement path of the gear ring relative to the gear in an embodiment of the present invention; Figure 7 is an enlarged view of region C of an embodiment of the present invention; Figure 8 is an overall side sectional view of an embodiment of the present invention; Fig. 9 is a flow chart of the conveying trajectory of the pusher platform according to an embodiment of the present invention; In the figure: 1, main machine platform; 101, avoidance groove; 102, sliding groove; 103, straight long groove; 104, round blind groove; 105, blanking edge; 2, motor frame; 3, motor; 4, coupling; 5, transmission shaft; 6, gear; 7, gear ring; 71, connecting section; 8, push platform; 81, sliding point; 82, rough top surface; 9, spring; 10, top plate; 11, side plate; 12, top plate; 13, rear cover; 14, first hydraulic cylinder; 15, shear knife; 16, second hydraulic cylinder; 17, pressure block; 171, rough bottom surface; 18, front baffle. DETAILED DESCRIPTION
[0015] The following is a further non-limiting detailed description of the technical solution of the present invention in conjunction with the preferred embodiments and the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.
[0016] refer to Figures 1 to 9 The embodiment of the present invention provides a scrap steel shearing machine with high safety. Figure 1 Schematic diagram of the overall structure of an embodiment of the present invention, as shown in Figure 1As shown, the scrap steel shearing machine with high safety comprises a mainframe 1, side plates 11 are welded on both sides above the mainframe 1, a top plate 12 is welded above the two side plates 11, and a second hydraulic cylinder 16 is fixedly arranged on the top plate 12. Figure 8 As shown, the output end of the second hydraulic cylinder 16 passes through the top plate 12 and is fixedly connected to a pressure block 17. The top plate 12 is also fixedly provided with a first hydraulic cylinder 14, which is located behind the second hydraulic cylinder 16. The output end of the first hydraulic cylinder 14 passes through the top plate 12 and is fixedly connected to a shearing knife 15.
[0017] The output end of the second hydraulic cylinder 16 is extended and retracted to drive the pressing block 17 to rise and fall, thereby realizing the material pressing work when shearing the sheet-like scrap steel. The output end of the first hydraulic cylinder 14 is extended and retracted to drive the shearing knife 15 to rise and fall, thereby realizing the shearing work of the sheet-like scrap steel.
[0018] like Figures 2 to 4 As shown, a motor frame 2 is welded to one side of the mainframe 1, a motor 3 is fixedly installed inside the motor frame 2, a coupling 4 is connected to the output end of the motor 3, and a transmission shaft 5 is connected to the other end of the coupling 4. The transmission shaft 5 passes through the left and right sides of the mainframe 1. A number of gears 6 are evenly sleeved on the transmission shaft 5 located inside the mainframe 1. The outer side of each gear 6 is meshed with a gear ring 7. A connecting section 71 is welded above each gear ring 7, and a pusher 8 is welded above each connecting section 71. Figure 5 to Figure 6 As shown, a avoidance groove 101 is opened at a position on the main platform 1 corresponding to the pushing platform 8, and the avoidance groove 101 leaves an avoidance space for the sliding of the pushing platform 8. A sliding point 81 is glued to one side of the pushing platform 8, and a sliding groove 102 is opened in the avoidance groove 101 at a position corresponding to the sliding point 81.
[0019] The motor 3 is used as the power source, and the coupling 4 and the transmission shaft 5 drive the gear 6 to rotate. The gear 6 and the gear ring 7 are meshed for transmission. The sliding point 81 fixedly connected to the gear ring 7 slides up, right, down, and left in the sliding groove 102 in sequence as a guide, so that the gear ring 7 drives the push platform 8 to move up, backward, down, and forward in the avoidance groove 101 in sequence relative to the gear 6.
[0020] In certain preferred embodiments, Figure 8 As shown, a blanking edge 105 is provided at the rear of the mainframe 1, which is conducive to better blanking of the scrap steel after shearing. A rear baffle 13 is welded at the rear of the top plate 12, which is conducive to blocking the metal residues that pop out of some brittle scrap steel due to local fracture, thereby preventing safety accidents caused by the popping out.
[0021] In certain preferred embodiments, Figure 8As shown, a front baffle 18 is also provided on the top plate 12. The front baffle 18 is a T-shaped structure, and the height of the front baffle 18 is slightly greater than the difference between the distance between the lower surface of the top plate 12 and the upper surface of the mainframe 1 and the thickness of the pressing block 17. The lower end of the front baffle 18 is plugged into the pressing block 17. When the pressing block 17 descends, the front baffle 18 descends accordingly. When the pressing block 17 presses the scrap steel, the front baffle 18 blocks the front side of the scrap steel shearing operation to prevent some brittle scrap steel from partially breaking and popping out metal residues to avoid the residues from jumping out and injuring people. When the pressing block 17 rises and resets, the front baffle 18 rises and returns to the initial position accordingly.
[0022] In certain preferred embodiments, Figure 7 As shown, a plurality of straight long grooves 103 are evenly formed on the upper surface of the mainframe 1, which are conducive to causing a slight deformation of the lower surface of the sheet-like scrap steel when the pressing block 17 presses the material, thereby improving the roughness of the surface of the sheet-like scrap steel. A plurality of circular blind grooves 104 are formed at the bottom of each straight long groove 103, each circular blind groove 104 is provided with a spring 9, and a top sheet 10 is glued on the top of each spring 9. When the spring 9 is naturally stretched, the top sheet 10 is lifted to a height slightly higher than the upper surface of the mainframe 1, which is conducive to the removal of the sheet-like scrap steel after the pressing block 17 presses the material.
[0023] In certain preferred embodiments, Figure 8 As shown, the lower structure of the pressing block 17 is an uneven convex rough bottom surface 171, which is beneficial to increase the surface roughness of the sheet-like scrap steel when pressing the material.
[0024] In certain preferred embodiments, Figure 4 As shown, the top surface of the pushing platform 8 is set to be an uneven rough top surface 82, which is conducive to increasing the friction between the two when the sheet-like scrap steel is driven by the pushing platform 8 for transmission, thereby ensuring the smooth progress of the feeding work.
[0025] In some preferred embodiments, the method of moving the gear ring 7 relative to the gear 6 includes: The motor 3 is started, and the transmission shaft 5 is driven to rotate through the coupling 4, and the gear 6 rotates around the transmission shaft 5 as the axis. Since the gear ring 7 is connected to the pusher 8 through the connecting section 71, as shown in FIG. Figure 6 As shown, the movement trajectory of the sliding point 81 on the push platform 8 in the sliding groove 102 corresponds to the movement trajectory of the gear ring 7 relative to the gear 6, that is, the sliding point 81 is limited by sliding up, right, down, and left in the sliding groove 102 in sequence, and the gear ring 7 realizes movement in the upward, backward, downward, and forward directions in sequence through the meshing and rotating gear 6.
[0026] In some preferred embodiments, the conveying work of the pusher 8 on the sheet-like scrap steel also includes the following method: Due to the meshing transmission of gear 6 and gear ring 7, Fig. 9As shown, the push table 8 is driven to move up, back, down and forward in the avoidance groove 101 in sequence, so as to support the scrap steel flakes upward, convey them backwards, retract them downwards, return them forwards and repeat the above actions in sequence until the scrap steel flakes are transported to a suitable shearing position. The output end of the second hydraulic cylinder 16 is extended, driving the pressure block 17 to press on the scrap steel flakes below. Then the first hydraulic cylinder 14 is extended, driving the shearing knife 15 to shear the scrap steel flakes. Subsequently, the second hydraulic cylinder 16 and the first hydraulic cylinder 14 are both retracted upwards to their initial positions, and the scrap steel flakes are continued to be conveyed backwards by the push table 8, completing the shearing work of each section in sequence.
[0027] In the above embodiment, the working principle of the embodiment of the present invention is as follows: the sheet scrap steel is fed from the front entrance of the workbench, the output end of the second hydraulic cylinder 16 is extended, driving the pressing block 17 to press the sheet scrap steel below, and the surface roughness of the sheet scrap steel increases due to the influence of the rough bottom surface 171 and the straight long groove 103 during the pressing process, and then the first hydraulic cylinder 14 is extended, driving the shearing knife 15 to shear the sheet scrap steel, and the sheared scrap steel flows out from the blanking edge 105, and then the second hydraulic cylinder 16 and the first hydraulic cylinder 14 are retracted to the initial state. The motor 3 is started to drive the gear 6 to rotate through the coupling 4 and the transmission shaft 5. The gear 6 and the gear ring 7 are meshed for transmission. The sliding point 81 fixedly connected to the gear ring 7 slides upward, rightward, downward and leftward in the sliding groove 102 in sequence for guidance, so that the gear ring 7 drives the push platform 8 to realize the movement of upward support, backward transmission, downward retraction and forward return relative to the gear 6 in the avoidance groove 101 in sequence, so that the push platform 8 drives the sheet-like scrap steel above to be transmitted forward until the suitable shearing length is transmitted, and the compression and shearing work of the sheet-like scrap steel is repeated again.
[0028] In the description of the present invention, it is necessary to understand that the terms "up", "down", "front", "back", "left", "right", etc., indicating directions or positional relationships, are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation on the present invention.
[0029] Finally, it should be pointed out that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit them. Although the present invention has been described in detail with reference to the above embodiments, a person skilled in the art should understand that the technical solutions described in the above embodiments can still be modified, or some of the technical features can be replaced by equivalents, and these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.
Claims
1. A scrap steel shearing machine with high safety, comprising a main machine (1), characterized in that: Side plates (11) are welded on both sides above the main platform (1), and a top plate (12) is also welded above the two side plates (11). A second hydraulic cylinder (16) is fixedly arranged on the top plate (12), and the output end of the second hydraulic cylinder (16) passes through the top plate (12) and is fixedly connected to a pressure block (17). A first hydraulic cylinder (14) is also fixedly arranged on the top plate (12), and the first hydraulic cylinder (14) is located behind the second hydraulic cylinder (16). The output end of the first hydraulic cylinder (14) passes through the top plate (12) and is fixedly connected to a shearing knife (15). The output end of the second hydraulic cylinder (16) is extended and retracted to drive the pressure block (17) to rise and fall to achieve the pressing work when shearing the sheet-like scrap steel, and the output end of the first hydraulic cylinder (14) is extended and retracted to drive the shearing knife (15) to rise and fall to achieve the shearing work of the sheet-like scrap steel; A motor frame (2) is welded to one side of the mainframe (1); a motor (3) is fixedly installed inside the motor frame (2); an output end of the motor (3) is connected to a coupling (4); the other end of the coupling (4) is connected to a transmission shaft (5); the transmission shaft (5) passes through the left and right sides of the mainframe (1); a plurality of gears (6) are evenly sleeved on the transmission shaft (5) and located inside the mainframe (1); the outer side of each gear (6) is meshingly connected to a gear ring (7); a connecting section (71) is welded above each gear ring (7); a pushing platform (8) is welded above each connecting section (71); a avoiding groove (101) is provided at a position on the mainframe (1) corresponding to the pushing platform (8); and the avoiding groove (101) is provided at a position on the mainframe (1) corresponding to the pushing platform (8); The positioning groove (101) leaves an avoidance space for the sliding of the pushing platform (8). A sliding point (81) is glued to one side of the pushing platform (8). A sliding groove (102) is provided in the avoidance groove (101) at a position corresponding to the sliding point (81). The motor (3) is used as a power source, and the coupling (4) and the transmission shaft (5) drive the gear (6) to rotate. The gear (6) and the gear ring (7) are meshed for transmission. The sliding point (81) fixedly connected relative to the gear ring (7) slides upward, rightward, downward, and leftward in the sliding groove (102) in sequence as a guide, so that the gear ring (7) drives the pushing platform (8) to move in the upward, backward, downward, and forward directions in sequence relative to the gear (6) in the avoidance groove (101).
2. A scrap steel shearing machine with high safety according to claim 1, characterized in that: The rear of the main machine platform (1) is provided with a blanking edge (105), and the blanking edge (105) is conducive to better blanking of the scrap steel after shearing. The rear of the top plate (12) is welded with a rear baffle (13), and the rear baffle (13) is conducive to blocking some brittle scrap steel from partially breaking and popping out metal residues, thereby preventing the popping out and causing safety accidents.
3. The scrap steel shearing machine with high safety according to claim 2, characterized in that: A front baffle (18) is also provided on the top plate (12). The front baffle (18) is a T-shaped structure. The height of the front baffle (18) is slightly greater than the difference between the distance between the lower surface of the top plate (12) and the upper surface of the mainframe (1) and the thickness of the pressing block (17). The lower end of the front baffle (18) is plugged into the pressing block (17). When the pressing block (17) descends, the front baffle (18) descends accordingly. When the pressing block (17) presses the scrap steel, the front baffle (18) blocks the front side of the scrap steel shearing operation, and is used to prevent some brittle scrap steel from partially breaking and popping out metal residues, thereby preventing the residues from jumping out and injuring people.
4. The scrap steel shearing machine with high safety according to claim 3 is characterized in that: The upper surface of the main machine platform (1) is also evenly provided with a plurality of straight long grooves (103). The straight long grooves (103) are conducive to causing a slight deformation of the lower surface of the sheet-like scrap steel when the pressing block (17) is pressing the material, thereby improving the roughness of the surface of the sheet-like scrap steel. The bottom of each straight long groove (103) is provided with a plurality of circular blind grooves (104). A spring (9) is arranged in each circular blind groove (104). A top sheet (10) is glued on the top of each spring (9). When the spring (9) is naturally extended, the top sheet (10) is lifted to a position slightly higher than the upper surface of the main machine platform (1), thereby facilitating the removal of the sheet-like scrap steel after the pressing block (17) has pressed the material.
5. The scrap steel shearing machine with high safety according to claim 4, characterized in that: The lower structure of the pressing block (17) is an uneven, convex, rough bottom surface (171), which is beneficial for increasing the surface roughness of the sheet-like scrap steel when pressing the material.
6. The scrap steel shearing machine with high safety according to claim 5, characterized in that: The top surface of the pushing platform (8) is configured as an uneven rough top surface (82), which is conducive to increasing the friction between the two when the sheet-shaped scrap iron and steel is driven by the pushing platform (8) for transmission, thereby ensuring the smooth progress of the feeding work.
7. The scrap steel shearing machine with high safety according to claim 6, characterized in that: The method for moving the gear ring (7) relative to the gear (6) comprises: The motor (3) is started, and the transmission shaft (5) is driven to rotate via the coupling (4), and the gear (6) rotates with the transmission shaft (5) as the axis. Since the gear ring (7) is connected to the push platform (8) via the connecting section (71), the movement trajectory of the sliding point (81) on the push platform (8) in the sliding groove (102) corresponds to the movement trajectory of the gear ring (7) relative to the gear (6), that is, the sliding point (81) is limited by sliding upward, rightward, downward, and leftward in the sliding groove (102) in sequence, and the gear ring (7) is moved in the upward, backward, downward, and forward directions in sequence through the meshing and rotating gear (6).
8. The scrap steel shearing machine with high safety according to claim 7, characterized in that: The work of the push platform (8) for conveying the flake scrap steel also includes the following method: Due to the meshing transmission of the gear (6) and the gear ring (7), the pushing platform (8) is driven to move up, backward, down and forward in the avoidance groove (101) in sequence, so as to realize the upward support of the scrap steel sheet, the backward transmission, the downward retraction, the forward return and the above-mentioned actions are repeated in sequence until the scrap steel sheet is transported to a suitable shearing position, the output end of the second hydraulic cylinder (16) is extended, driving the pressing block (17) to press the scrap steel sheet below, and then the first hydraulic cylinder (14) is extended, driving the shearing knife (15) to shear the scrap steel sheet, and then the second hydraulic cylinder (16) and the first hydraulic cylinder (14) are both retracted upward to the initial position, and then the scrap steel sheet is continuously transported backward by the pushing platform (8), and the shearing work of each section is completed in sequence.