A punching and shearing device for expanded metal with multiple specifications

Abstract

The present invention relates to a steel mesh punching and shearing device, and more specifically to a multi-specification steel mesh punching and shearing device, which includes a main mounting frame mechanism, a waste material pushing mechanism, a position adjustment mechanism, a punching and shearing power mechanism, and a punching and shearing mechanism. The waste material pushing mechanism is fixedly installed on the main mounting frame mechanism, the position adjustment mechanism is fixedly installed on the main mounting frame mechanism, the punching and shearing power mechanism is slidably installed on the position adjustment mechanism, the position adjustment mechanism is fixedly connected to the punching and shearing mechanism, and the punching and shearing mechanism is in contact with the punching and shearing power mechanism. This device can adapt to steel plates of different widths, ensure that the steel plate will not warp during the processing, and can process two specifications of steel meshes.

Description

Technical Field

[0001] The present invention relates to a steel plate mesh punching and shearing device, and more specifically to a multi-specification punching and shearing device for steel plate meshes. Background Art

[0002] The steel plate mesh punching and shearing machine is a wire mesh machine developed to meet the rapid development of the wire mesh market and actual needs, which can achieve high-efficiency production. The steel plate mesh machine is divided into two types: stretch mesh and punched mesh. It is also called steel plate mesh punching and shearing machine, diamond mesh machine, stretch mesh machine, round hole mesh machine, and special-shaped mesh punched mesh machine.

[0003] The inventor of the present invention found that the existing steel plate mesh punching and shearing machines can only produce steel plate meshes with fixed specification meshes, and it is more troublesome to replace the punching and shearing parts to produce steel plate meshes with different specifications. Summary of the Invention

[0004] The main technical problem to be solved by the present invention is to provide a multi-specification punching and shearing device for steel plate meshes. This device can adapt to steel plates of different widths, ensure that the steel plates will not warp during the processing, and can process two specifications of steel plate meshes.

[0005] The object of the present invention is achieved by the following technical solutions:

[0006] A multi-specification punching and shearing device for steel plate meshes, including a main mounting frame mechanism, a waste material pushing mechanism, a position adjustment mechanism, a punching and shearing power mechanism, and a punching and shearing mechanism. The waste material pushing mechanism is fixedly installed on the main mounting frame mechanism, the position adjustment mechanism is fixedly installed on the main mounting frame mechanism, the punching and shearing power mechanism is slidably installed on the position adjustment mechanism, the position adjustment mechanism is fixedly connected to the punching and shearing mechanism, and the punching and shearing mechanism is in contact with the punching and shearing power mechanism.

[0007] As a further optimization of this technical solution, the main mounting frame mechanism of the multi-specification punching and shearing device for steel plate meshes of the present invention includes a main frame, a load-bearing plate, a conveyor belt assembly, a track cross beam, a first motor, a bidirectional threaded rod, a sliding cross plate, and a roller. A track cross beam is fixedly installed on the main frame, a first motor is fixedly installed in the through hole of the track cross beam, the output end of the first motor is fixedly installed with a bidirectional threaded rod, the bidirectional threaded rod is rotatably installed in the groove provided on the track cross beam, the bidirectional threaded rod is threadedly connected to the sliding cross plate, the sliding cross plate is slidably installed in the groove provided on the track cross beam, the roller is rotatably installed in the groove provided on the sliding cross plate, and a load-bearing plate is fixedly installed on the main frame.

[0008] As a further optimization of the technical solution, the waste material pushing mechanism of the multi - specification punching and shearing device for expanded metal sheets of the present invention includes a first hydraulic cylinder, a sliding plate member, a second motor, an externally attached rubber conveyor belt, and a conveyor shaft. The first hydraulic cylinder is fixedly installed on the main frame. The output end of the first hydraulic cylinder is fixedly installed with a sliding plate member. The sliding plate member is slidably installed in a groove provided on the main frame. A second motor is fixedly installed in a through - hole provided on the sliding plate member. The output end of the second motor is fixedly installed with a conveyor shaft. The conveyor shaft is rotatably installed in a groove provided on the sliding plate member. The externally attached rubber conveyor belt is installed on the conveyor shaft.

[0009] As a further optimization of the technical solution, the position adjustment mechanism of the multi - specification punching and shearing device for expanded metal sheets of the present invention includes a mounting cross - beam, a second hydraulic cylinder, a short threaded rod, a third motor, and a sliding rod. The second hydraulic cylinder is fixedly installed in a through - hole of the main frame. The output end of the second hydraulic cylinder is fixedly installed with a mounting cross - beam. A third motor is fixedly installed on the mounting cross - beam. The output end of the third motor is fixedly installed with a short threaded rod. The short threaded rod is rotatably installed in a groove provided on the mounting cross - beam. The sliding rod is fixedly installed on the mounting cross - beam. The mounting cross - beam is slidably installed in a groove provided on the main frame.

[0010] As a further optimization of the technical solution, the punching and shearing power mechanism of the multi - specification punching and shearing device for expanded metal sheets of the present invention includes a square frame, a fourth motor, a first sprocket, a first chain, a second sprocket, a first cam, and a second cam. The square frame is slidably installed on the sliding rod. The square frame is threadedly connected to the short threaded rod. A fourth motor is fixedly installed in a through - hole of the square frame. The output end of the fourth motor is fixedly installed with a first sprocket. The first sprocket meshes with the first chain. The first chain meshes with the second sprocket. The second sprocket is fixedly installed on the first cam. The first cam is rotatably installed in a through - hole provided on the square frame. The first cam is fixedly connected to the second cam. The second cam is rotatably installed in a groove provided on the square frame.

[0011] As a further optimization of the technical solution, the punching and shearing mechanism of the multi - specification punching and shearing device for expanded metal sheets of the present invention includes a column, a spring, a fifth motor, a third sprocket, a second chain, a fourth sprocket, a two - layer punching and shearing part, a one - layer punching and shearing part, a synchronous adjustment rod, and a mounting plate. The second cam is in contact with the mounting plate, and the first cam is in contact with the mounting plate. A column is fixedly installed on the mounting plate, and a spring is sleeved on the column. One end of the spring is fixedly installed on the mounting plate, and the other end of the spring is fixedly installed on the mounting cross - beam. The column is slidably installed in a through - hole provided on the mounting cross - beam. A fifth motor is fixedly installed on the mounting plate. The output end of the fifth motor is fixedly installed with a third sprocket. The third sprocket is engaged with the second chain, and the second chain is engaged with the fourth sprocket. The fourth sprocket is fixedly installed on the synchronous adjustment rod. The synchronous adjustment rod is rotatably installed in a groove provided on the mounting plate. A two - layer punching and shearing part is fixedly installed on the mounting plate, and a one - layer punching and shearing part is fixedly installed on the synchronous adjustment rod. The synchronous adjustment rod passes through a through - hole provided on the two - layer punching and shearing part. The mounting plate is slidably installed in a groove provided on the mounting cross - beam.

[0012] The beneficial effects of the multi - specification punching and shearing device for expanded metal sheets of the present invention are as follows:

[0013] 1. Place the steel plate on the conveyor belt assembly. Drive the steel plate to move forward through the conveyor belt assembly. Start the first motor. The first motor drives the bidirectional threaded rod to rotate. The bidirectional threaded rod is threadedly connected to the sliding cross - plate. At this time, the rollers on both sides clamp the steel plate, which can not only correct the position of the steel plate but also ensure that the steel plate will not shift during transportation. The rollers are rotatably installed on the sliding cross - plate, so it will not affect the forward movement of the steel plate.

[0014] 2. Start the third motor. The third motor drives the short threaded rod to rotate. The short threaded rod is connected to the square frame at two positions. At this time, the square frame slides on the short threaded rod and the sliding rod, so that the second cam disengages from the mounting plate, and the first cam moves to the mounting plate. At the same time, start the fifth motor. The fifth motor drives the second chain to rotate through the third sprocket. The second chain drives the synchronous adjustment rod to rotate through the fourth sprocket, so that the one - layer punching and shearing part fixed on the synchronous adjustment rod rotates. At this time, the two - layer punching and shearing part is the main part for punching and shearing, and the expanded metal sheets produced at this time have denser meshes.

[0015] 3. The externally attached rubber conveyor belt is located above the load - bearing plate. When the steel plate is thin and during punching and shearing, the front end of the steel plate is prone to warping. At this time, the first hydraulic cylinder can be started. The first hydraulic cylinder pushes the sliding plate part to lower the externally attached rubber conveyor belt, thus ensuring the stability of the front - end steel plate. When the steel plate is almost processed and the tail moves to the load - bearing plate, the conveyor belt assembly no longer provides power for the remaining steel plate to move forward, resulting in incomplete processing of the steel plate. At this time, the externally attached rubber conveyor belt can be lowered to make the externally attached rubber conveyor belt press the remaining steel plate, and the second motor is started. The second motor drives the externally attached rubber conveyor belt to rotate through the transmission shaft, so as to move the remaining steel plate forward, enabling the steel plate to be completely processed. Brief Description of the Drawings

[0016] The present invention will be further described in detail below with reference to the drawings and specific implementation methods.

[0017] Figure 1 It is a three-dimensional structural schematic diagram of a multi-specification punching and shearing device for expanded metal sheets according to the present invention.

[0018] Figure 2 It is a three-dimensional structural schematic diagram of a multi-specification punching and shearing device for expanded metal sheets according to the present invention.

[0019] Figure 3 It is a partial three-dimensional structural schematic diagram of a multi-specification punching and shearing device for expanded metal sheets according to the present invention.

[0020] Figure 4 It is a partial three-dimensional structural schematic diagram of a multi-specification punching and shearing device for expanded metal sheets according to the present invention.

[0021] Figure 5 It is a three-dimensional structural schematic diagram of the main mounting frame mechanism 1 of a multi-specification punching and shearing device for expanded metal sheets according to the present invention.

[0022] Figure 6 It is a partial three-dimensional structural schematic diagram of the main mounting frame mechanism 1 of a multi-specification punching and shearing device for expanded metal sheets according to the present invention.

[0023] Figure 7 It is a three-dimensional structural schematic diagram of the waste material pushing mechanism 2 of a multi-specification punching and shearing device for expanded metal sheets according to the present invention.

[0024] Figure 8 It is a partial cross-sectional structural schematic diagram of the waste material pushing mechanism 2 of a multi-specification punching and shearing device for expanded metal sheets according to the present invention.

[0025] Figure 9 It is a three-dimensional structural schematic diagram of the position adjustment mechanism 3 of a multi-specification punching and shearing device for expanded metal sheets according to the present invention.

[0026] Figure 10 It is a partial three-dimensional structural schematic diagram of a multi-specification punching and shearing device for expanded metal sheets according to the present invention.

[0027] Figure 11 It is a three-dimensional structural schematic diagram of the punching and shearing power mechanism 4 of a multi-specification punching and shearing device for expanded metal sheets according to the present invention.

[0028] Figure 12 It is a partial cross-sectional structural schematic diagram of the punching and shearing power mechanism 4 of a multi-specification punching and shearing device for expanded metal sheets according to the present invention.

[0029] Figure 13 It is a three-dimensional structural schematic diagram of the punching and shearing mechanism 5 of a multi-specification punching and shearing device for expanded metal sheets according to the present invention.

[0030] Figure 14 is Figure 13 A partial enlarged structural schematic diagram of A in

[0031] Figure 15 This is a supplementary three-dimensional structural schematic diagram of the punching and shearing mechanism 5 of a multi-specification punching and shearing device for expanded metal sheets according to the present invention.

[0032] In the figure: main mounting frame mechanism 1; main frame 1-1; load-bearing plate 1-2; conveyor belt assembly 1-3; track cross beam 1-4; first motor 1-5; bidirectional threaded rod 1-6; sliding cross plate 1-7; roller 1-8; waste material pushing mechanism 2; first hydraulic cylinder 2-1; sliding plate member 2-2; second motor 2-3; externally attached rubber conveyor belt 2-4; conveyor shaft 2-5; position adjustment mechanism 3; mounting cross beam 3-1; second hydraulic cylinder 3-2; short threaded rod 3-3; third motor 3-4; sliding rod 3-5; punching and shearing power mechanism 4; square frame 4-1; fourth motor 4-2; first sprocket 4-3; first chain 4-4; second sprocket 4-5; first cam 4-6; second cam 4-7; punching and shearing mechanism 5; column 5-1; spring 5-2; fifth motor 5-3; third sprocket 5-4; second chain 5-5; fourth sprocket 5-6; two-layer punching and shearing member 5-7; one-layer punching and shearing member 5-8; synchronous adjustment rod 5-9; mounting plate 5-10. Specific embodiments

[0033] The present invention will be further described in detail below with reference to the accompanying drawings. Specific embodiment 1:

[0035] The following will be combined with Figure 1-15 to illustrate this embodiment. A multi-specification punching and shearing device for expanded metal sheets includes a main mounting frame mechanism 1, a waste material pushing mechanism 2, a position adjustment mechanism 3, a punching and shearing power mechanism 4, and a punching and shearing mechanism 5. The waste material pushing mechanism 2 is fixedly installed on the main mounting frame mechanism 1, the position adjustment mechanism 3 is fixedly installed on the main mounting frame mechanism 1, the punching and shearing power mechanism 4 is slidably installed on the position adjustment mechanism 3, the position adjustment mechanism 3 is fixedly connected to the punching and shearing mechanism 5, and the punching and shearing mechanism 5 is in contact with the punching and shearing power mechanism 4. Specific embodiment 2:

[0037] The following will be combined with Figure 1-15To describe this embodiment, this embodiment further elaborates on Embodiment 1. The main mounting frame mechanism 1 includes a main frame 1-1, a load-bearing plate 1-2, a conveyor belt assembly 1-3, a track crossbeam 1-4, a first motor 1-5, a bidirectional threaded rod 1-6, a sliding crossplate 1-7, and a roller 1-8. A track crossbeam 1-4 is fixedly installed on the main frame 1-1. A first motor 1-5 is fixedly installed in the through hole of the track crossbeam 1-4. The output end of the first motor 1-5 is fixedly installed with a bidirectional threaded rod 1-6. The bidirectional threaded rod 1-6 is rotatably installed in the groove provided on the track crossbeam 1-4. The bidirectional threaded rod 1-6 is threadedly connected to the sliding crossplate 1-7. The sliding crossplate 1-7 is slidably installed in the groove provided on the track crossbeam 1-4. The roller 1-8 is rotatably installed in the groove provided on the sliding crossplate 1-7. A load-bearing plate 1-2 is fixedly installed on the main frame 1-1. Specific Embodiment 3:

[0039] The following combines with Figure 1-15 To describe this embodiment, this embodiment further elaborates on Embodiment 2. The surplus material pushing mechanism 2 includes a first hydraulic cylinder 2-1, a sliding plate member 2-2, a second motor 2-3, an externally attached rubber conveyor belt 2-4, and a conveyor shaft 2-5. The first hydraulic cylinder 2-1 is fixedly installed on the main frame 1-1. The output end of the first hydraulic cylinder 2-1 is fixedly installed with a sliding plate member 2-2. The sliding plate member 2-2 is slidably installed in the groove provided on the main frame 1-1. A second motor 2-3 is fixedly installed in the through hole provided on the sliding plate member 2-2. The output end of the second motor 2-3 is fixedly installed with a conveyor shaft 2-5. The conveyor shaft 2-5 is rotatably installed in the groove provided on the sliding plate member 2-2. The externally attached rubber conveyor belt 2-4 is installed on the conveyor shaft 2-5. Specific Embodiment 4:

[0041] The following combines with Figure 1-15 To describe this embodiment, this embodiment further elaborates on Embodiment 2. The position adjustment mechanism 3 includes a mounting crossbeam 3-1, a second hydraulic cylinder 3-2, a short threaded rod 3-3, a third motor 3-4, and a sliding rod 3-5. The second hydraulic cylinder 3-2 is fixedly installed in the through hole of the main frame 1-1. The output end of the second hydraulic cylinder 3-2 is fixedly installed with a mounting crossbeam 3-1. A third motor 3-4 is fixedly installed on the mounting crossbeam 3-1. The output end of the third motor 3-4 is fixedly installed with a short threaded rod 3-3. The short threaded rod 3-3 is rotatably installed in the groove provided on the mounting crossbeam 3-1. The sliding rod 3-5 is fixedly installed on the mounting crossbeam 3-1. The mounting crossbeam 3-1 is slidably installed in the groove provided on the main frame 1-1. Specific Embodiment 5:

[0043] The following combines with Figure 1-15Description of this embodiment: This embodiment further describes Embodiment 4. The punching and shearing power mechanism 4 includes a square frame 4-1, a fourth motor 4-2, a first sprocket 4-3, a first chain 4-4, a second sprocket 4-5, a first cam 4-6, and a second cam 4-7. The square frame 4-1 is slidably mounted on the slide bar 3-5. The square frame 4-1 is threadedly connected to the short threaded rod 3-3. A fourth motor 4-2 is fixedly mounted in the through hole of the square frame 4-1. The output end of the fourth motor 4-2 is fixedly mounted with a first sprocket 4-3. The first sprocket 4-3 meshes with the first chain 4-4. The first chain 4-4 meshes with the second sprocket 4-5. The second sprocket 4-5 is fixedly mounted on the first cam 4-6. The first cam 4-6 is rotatably mounted in the through hole provided on the square frame 4-1. The first cam 4-6 is fixedly connected to the second cam 4-7. The second cam 4-7 is rotatably mounted in the groove provided on the square frame 4-1. Specific Embodiment 6:

[0045] The following combines Figure 1-15 Description of this embodiment: This embodiment further describes Embodiment 5. The punching and shearing mechanism 5 includes a column 5-1, a spring 5-2, a fifth motor 5-3, a third sprocket 5-4, a second chain 5-5, a fourth sprocket 5-6, a two-layer punching and shearing member 5-7, a one-layer punching and shearing member 5-8, a synchronous adjustment rod 5-9, and a mounting plate 5-10. The second cam 4-7 contacts the mounting plate 5-10. The first cam 4-6 contacts the mounting plate 5-10. A column 5-1 is fixedly mounted on the mounting plate 5-10. A spring 5-2 is sleeved on the column 5-1. One end of the spring 5-2 is fixedly mounted on the mounting plate 5-10. The other end of the spring 5-2 is fixedly mounted on the mounting cross beam 3-1. The column 5-1 is slidably mounted in the through hole provided on the mounting cross beam 3-1. A fifth motor 5-3 is fixedly mounted on the mounting plate 5-10. The output end of the fifth motor 5-3 is fixedly mounted with a third sprocket 5-4. The third sprocket 5-4 meshes with the second chain 5-5. The second chain 5-5 meshes with the fourth sprocket 5-6. The fourth sprocket 5-6 is fixedly mounted on the synchronous adjustment rod 5-9. The synchronous adjustment rod 5-9 is rotatably mounted in the groove provided on the mounting plate 5-10. A two-layer punching and shearing member 5-7 is fixedly mounted on the mounting plate 5-10. A one-layer punching and shearing member 5-8 is fixedly mounted on the synchronous adjustment rod 5-9. The synchronous adjustment rod 5-9 passes through the through hole provided on the two-layer punching and shearing member 5-7. The mounting plate 5-10 is slidably mounted in the groove provided on the mounting cross beam 3-1.

[0046] The working principle of a multi-specification punching and shearing device for expanded metal sheets of the present invention is as follows:

[0047] Place the steel plate on the conveyor belt assembly 1-3, and drive the steel plate to move forward through the conveyor belt assembly 1-3. Start the first motor 1-5, and the first motor 1-5 drives the double-threaded rod 1-6 to rotate. The double-threaded rod 1-6 is threadedly connected to the sliding cross plate 1-7. At this time, the rollers 1-8 on both sides clamp the steel plate, which can not only correct the position of the steel plate, but also ensure that the steel plate will not shift during transportation. The rollers 1-8 are rotatably installed on the sliding cross plate 1-7, so it will not affect the forward movement of the steel plate.

[0048] When the front end of the steel plate moves onto the bearing plate 1-2, start the fourth motor 4-2. The fourth motor 4-2 drives the first sprocket 4-3 to rotate. The first sprocket 4-3 drives the first cam 4-6 and the second cam 4-7 to rotate through the first chain 4-4 and the second sprocket 4-5. At this time, the second cam 4-7 is located on the mounting plate 5-10. The second cam 4-7 rotates and presses the mounting plate 5-10, so that the punching and shearing mechanism 5 punches downward to complete the punching of the steel plate. The spring 5-2 is used to reset the punching and shearing mechanism 5. The displacement of the punching and shearing mechanism 5 is realized by the telescoping of the second hydraulic cylinders 3-2 at both ends, so as to realize the punching operation of the punching and shearing mechanism 5 on the steel plate mesh (at this time, the punching is jointly completed by the two-layer punching parts 5-7 and the one-layer punching parts 5-8).

[0049] Start the third motor 3-4. The third motor 3-4 drives the short threaded rod 3-3 to rotate. The short threaded rod 3-3 is connected to the square frame 4-1 at two positions. At this time, the square frame 4-1 slides on the short threaded rod 3-3 and the slide bar 3-5, so that the second cam 4-7 is separated from the mounting plate 5-10, and the first cam 4-6 moves onto the mounting plate 5-10. At the same time, start the fifth motor 5-3. The fifth motor 5-3 drives the second chain 5-5 to rotate through the third sprocket 5-4. The second chain 5-5 drives the synchronous adjustment rod 5-9 to rotate through the fourth sprocket 5-6, so that the one-layer punching parts 5-8 fixed on the synchronous adjustment rod 5-9 rotate. At this time, the two-layer punching parts 5-7 are the main punching parts, and the mesh of the steel plate mesh produced at this time is denser.

[0050] The externally attached rubber conveyor belt 2-4 is located above the bearing plate 1-2. When the steel plate is thin and the front end of the steel plate is prone to warping during punching, the first hydraulic cylinder 2-1 can be started. The first hydraulic cylinder 2-1 pushes the sliding plate member 2-2 to lower the externally attached rubber conveyor belt 2-4, so as to ensure the stability of the front-end steel plate. When the tail of the steel plate moves to the bearing plate 1-2 when the steel plate is almost processed, the conveyor belt assembly 1-3 no longer provides power for the remaining steel plate to move forward, resulting in incomplete processing of the steel plate. At this time, the externally attached rubber conveyor belt 2-4 can be lowered to make the externally attached rubber conveyor belt 2-4 squeeze the remaining steel plate, and the second motor 2-3 is started. The second motor 2-3 drives the externally attached rubber conveyor belt 2-4 to rotate through the transmission shaft 2-5, so as to move the remaining steel plate forward and make the steel plate be completely processed.

[0051] Certainly, the above description is not a limitation of the present invention, and the present invention is not limited to the above examples either. Changes, modifications, additions, or substitutions made by those of ordinary skill in the art within the scope of the essence of the present invention also fall within the protection scope of the present invention.

Claims

1. A punching and shearing device for expanded metal with multiple specifications, comprising a main mounting frame mechanism (1), a waste material pushing mechanism (2), a position adjusting mechanism (3), a punching and shearing power mechanism (4) and a punching and shearing mechanism (5), characterized in that: The described leftover material pushing mechanism (2) is fixedly installed on the main mounting frame mechanism (1), the position adjustment mechanism (3) is fixedly installed on the main mounting frame mechanism (1), the punching and shearing power mechanism (4) is slidably installed on the position adjustment mechanism (3), the position adjustment mechanism (3) is fixedly connected to the punching and shearing mechanism (5), and the punching and shearing mechanism (5) is in contact with the punching and shearing power mechanism (4); The described main mounting frame mechanism (1) includes a main frame (1-1), a load-bearing plate (1-2), a conveyor belt assembly (1-3), a track cross beam (1-4), a first motor (1-5), a bidirectional threaded rod (1-6), a sliding cross plate (1-7), and a roller (1-8). A track cross beam (1-4) is fixedly installed on the main frame (1-1). A first motor (1-5) is fixedly installed in the through hole of the track cross beam (1-4). The output end of the first motor (1-5) is fixedly installed with a bidirectional threaded rod (1-6). The bidirectional threaded rod (1-6) is rotatably installed in the groove provided on the track cross beam (1-4). The bidirectional threaded rod (1-6) is threadedly connected to the sliding cross plate (1-7). The sliding cross plate (1-7) is slidably installed in the groove provided on the track cross beam (1-4). The roller (1-8) is rotatably installed in the groove provided on the sliding cross plate (1-7). A load-bearing plate (1-2) is fixedly installed on the main frame (1-1); The described position adjustment mechanism (3) includes an installation cross beam (3-1), a second hydraulic cylinder (3-2), a short threaded rod (3-3), a third motor (3-4), and a sliding rod (3-5). The second hydraulic cylinder (3-2) is fixedly installed in the through hole of the main frame (1-1). The output end of the second hydraulic cylinder (3-2) is fixedly installed with an installation cross beam (3-1). A third motor (3-4) is fixedly installed on the installation cross beam (3-1). The output end of the third motor (3-4) is fixedly installed with a short threaded rod (3-3). The short threaded rod (3-3) is rotatably installed in the groove provided on the installation cross beam (3-1). The sliding rod (3-5) is fixedly installed on the installation cross beam (3-1). The installation cross beam (3-1) is slidably installed in the groove provided on the main frame (1-1); The described punching and shearing power mechanism (4) includes a square frame (4-1), a fourth motor (4-2), a first sprocket (4-3), a first chain (4-4), a second sprocket (4-5), a first cam (4-6), and a second cam (4-7). The square frame (4-1) is slidably mounted on the slide bar (3-5), and the square frame (4-1) is threadedly connected to the short threaded rod (3-3). A fourth motor (4-2) is fixedly mounted in the through hole of the square frame (4-1). The output end of the fourth motor (4-2) is fixedly mounted with a first sprocket (4-3). The first sprocket (4-3) meshes with the first chain (4-4), and the first chain (4-4) meshes with the second sprocket (4-5). The second sprocket (4-5) is fixedly mounted on the first cam (4-6). The first cam (4-6) is rotatably mounted in the through hole provided on the square frame (4-1). The first cam (4-6) is fixedly connected to the second cam (4-7). The second cam (4-7) is rotatably mounted in the groove provided on the square frame (4-1). The described punching and shearing mechanism (5) includes a column (5-1), a spring (5-2), a fifth motor (5-3), a third sprocket (5-4), a second chain (5-5), a fourth sprocket (5-6), a two-layer punching and shearing part (5-7), a one-layer punching and shearing part (5-8), a synchronous adjustment rod (5-9), and a mounting plate (5-10). The second cam (4-7) contacts the mounting plate (5-10), and the first cam (4-6) contacts the mounting plate (5-10). A column (5-1) is fixedly mounted on the mounting plate (5-10). A spring (5-2) is sleeved on the column (5-1). One end of the spring (5-2) is fixedly mounted on the mounting plate (5-10), and the other end of the spring (5-2) is fixedly mounted on the mounting cross beam (3-1). The column (5-1) is slidably mounted in the through hole provided on the mounting cross beam (3-1). A fifth motor (5-3) is fixedly mounted on the mounting plate (5-10). The output end of the fifth motor (5-3) is fixedly mounted with a third sprocket (5-4). The third sprocket (5-4) meshes with the second chain (5-5), and the second chain (5-5) meshes with the fourth sprocket (5-6). The fourth sprocket (5-6) is fixedly mounted on the synchronous adjustment rod (5-9). The synchronous adjustment rod (5-9) is rotatably mounted in the groove provided on the mounting plate (5-10). A two-layer punching and shearing part (5-7) is fixedly mounted on the mounting plate (5-10). A one-layer punching and shearing part (5-8) is fixedly mounted on the synchronous adjustment rod (5-9). The synchronous adjustment rod (5-9) passes through the through hole provided on the two-layer punching and shearing part (5-7). The mounting plate (5-10) is slidably mounted in the groove provided on the mounting cross beam (3-1).

2. The multi-specification punching and shearing device for expanded metal sheets according to claim 1, characterized in that: The described leftover material pushing mechanism (2) includes a first hydraulic cylinder (2-1), a sliding plate member (2-2), a second motor (2-3), an externally attached rubber conveyor belt (2-4), and a conveyor shaft (2-5). The first hydraulic cylinder (2-1) is fixedly installed on the main frame (1-1). The output end of the first hydraulic cylinder (2-1) is fixedly installed with the sliding plate member (2-2). The sliding plate member (2-2) is slidably installed in a groove provided on the main frame (1-1). A second motor (2-3) is fixedly installed in a through hole provided on the sliding plate member (2-2). The output end of the second motor (2-3) is fixedly installed with the conveyor shaft (2-5). The conveyor shaft (2-5) is rotatably installed in a groove provided on the sliding plate member (2-2). The externally attached rubber conveyor belt (2-4) is installed on the conveyor shaft (2-5).

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