Strip steel shearing device and operation method thereof

Abstract

The invention discloses a strip steel shearing device and an operation method thereof. The technical problem that the edge of strip steel is prone to being impacted in the prior art is solved. The strip steel shearing device comprises a crescent shear, a guide plate, a first lifting roller, a second lifting roller, a first grating assembly, a second grating assembly, a third grating assembly and a controller. The crescent shear comprises a shearing platform, and the guide plate and the shearing platform are arranged at an angle. The first lifting roller is installed at an inlet of the shearing platform and located on the side, away from the shearing platform, of the guide plate. The second lifting roller is installed at an outlet of the shearing platform. The first grating assembly, the second grating assembly and the third grating assembly are sequentially arranged from top to bottom in the vertical direction. And the first grating assembly, the second grating assembly and the third grating assembly are electrically connected with the controller. According to the strip steel shearing device disclosed by the embodiment of the invention, the lifting roller is additionally arranged at the key position, so that the condition of abnormal shearing caused by single-side impact on the crescent shear trolley due to poor plate shape is effectively avoided.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of cold-rolled sheet production, and particularly relates to a strip steel shearing device and an operation method thereof. BACKGROUND

[0002] In the cold-rolled sheet production process, the distance between the welding machine equipment and the crescent shear equipment is 4200 mm, the span is large, and a material passing platform cannot be set due to the special nature of the equipment function. The equipment is only supported by three supporting rollers to bear the weight of the strip steel. The lower shearing blade platform of the crescent shear trolley is only 15 mm lower than the material passing table, so the plate shape requirement is extremely high. When cutting the crescent, if the strip steel has single-sided wave, double-sided wave, sickle bend and other plate shape problems, the strip steel on the side lower than the lower shearing blade platform of the crescent shear trolley has the risk of being hit. Although a guide plate is arranged below the trolley, it can only meet 70% of the production demand. When the strip steel with poor plate shape is encountered, the strip steel cannot be guided above the lower shearing blade platform, resulting in that the crescent shear trolley on one side hits the edge of the strip steel in the shearing process. Under the continuous forward thrust of the trolley, the strip steel is squeezed to the other side of the crescent shear trolley, finally causing the situation that the large crescent on one side is not sheared or the two sides are asymmetrically sheared. SUMMARY

[0003] To solve the above technical problems, the application discloses a strip steel shearing device and an operation method thereof.

[0004] The technical scheme adopted to achieve the purpose of the application is as follows. In a first aspect of the application, a strip steel shearing device is disclosed, comprising:

[0005] A crescent shear, the crescent shear comprising a shearing platform;

[0006] A guide plate, the guide plate being installed on the shearing platform, and the guide plate being arranged at an angle with the shearing platform;

[0007] A first lifting roller, the first lifting roller being installed at the inlet of the shearing platform, and the first lifting roller being located on the side of the guide plate away from the shearing platform;

[0008] A second lifting roller, the second lifting roller being installed at the outlet of the shearing platform;

[0009] A first grating assembly, a second grating assembly and a third grating assembly, the first grating assembly, the second grating assembly and the third grating assembly being sequentially arranged from top to bottom in the vertical direction; and

[0010] A controller, the first grating assembly, the second grating assembly and the third grating assembly being electrically connected with the controller.

[0011] In some embodiments, one end of the guide plate away from the shearing platform is lower than the shearing platform, and the included angle between the guide plate and the shearing platform is 35-45 degrees.

[0012] According to one embodiment of the present application, a plurality of guide rollers are arranged on the guide plate, and each of the guide rollers is arranged in sequence along the direction of the guide plate towards the shearing platform, and the guide rollers are rotationally connected with the guide plate.

[0013] According to one embodiment of the present application, the stroke of the second lifting roller is greater than the stroke of the first lifting roller.

[0014] According to one embodiment of the present application, the distance between the first grating assembly and the shearing platform in the vertical direction is 150 mm, the distance between the second grating assembly and the shearing platform in the vertical direction is 200 mm, and the distance between the third grating assembly and the shearing platform in the vertical direction is 250 mm.

[0015] The technical solution adopted to achieve the purpose of the present application is that, in the second aspect of the present application, a use method of the strip steel shearing device based on the above-mentioned embodiments is disclosed, which comprises the following steps: when the first grating is not triggered, starting a full-automatic mode; when the first grating assembly is triggered, the first lifting roller rises to the maximum height, and a semi-automatic mode is started; when the second grating assembly is triggered, the second lifting roller also rises to the maximum height, and the semi-automatic mode is started; and when the third grating assembly is triggered, a manual mode is started.

[0016] According to one embodiment of the present application, when the first grating is not triggered, the unwinding machine tension is 30 KN; when the first grating assembly is triggered, the unwinding machine tension is 20 KN; when the second grating assembly is triggered, the unwinding machine tension is 8 KN; and when the third grating assembly is triggered, the unwinding machine tension is 0 KN.

[0017] According to one embodiment of the present application, the full-automatic mode is that the weld or defect position of the strip steel is automatically positioned and stopped at the crescent shears, the crescent shears automatically shears the strip steel, and the strip steel is automatically discharged after the shearing is completed.

[0018] According to one embodiment of the present application, the semi-automatic mode is that when the strip steel moves, an operator controls the strip steel to move to the position where the weld or defect of the strip steel is located at the crescent shears, and then the crescent shears automatically shears the strip steel, and the strip steel is automatically discharged after the shearing is completed.

[0019] According to one embodiment of the present application, the manual mode is that the strip steel is moved by the operator, the position of the weld or the defect of the strip steel is located at the moon-shaped shears, the shearing depth is manually positioned by the operator, and the strip steel is manually discharged after the shearing is completed.

[0020] According to the technical solution, the strip steel shearing device comprises a moon-shaped shear, a guide plate, a first lifting roller, a second lifting roller, a first grating assembly, a second grating assembly, a third grating assembly, and a controller. The moon-shaped shear comprises a shearing platform, the guide plate is installed on the shearing platform, and the guide plate is arranged at an angle with the shearing surface. The first lifting roller is installed at the entrance of the shearing platform, and the first lifting roller is located on the side of the guide plate away from the shearing platform. The second lifting roller is installed at the outlet of the shearing platform. The first grating assembly, the second grating assembly, and the third grating assembly are sequentially arranged in the vertical direction from top to bottom. The first grating assembly, the second grating assembly, and the third grating assembly are electrically connected with the controller.

[0021] The strip steel shearing device disclosed in the present application preliminarily guides the strip steel through the guide plate, and the first lifting roller and the second lifting roller lift the height of the strip steel when necessary, so that the strip steel can enter the shearing platform more stably, and the impact phenomenon caused by the plate shape problem is reduced, thereby significantly improving the shearing quality, reducing the rate of defective products, greatly improving the stability of the production process, reducing the downtime and equipment damage caused by production accidents, and reducing the production cost. BRIEF DESCRIPTION OF DRAWINGS

[0022] In order for those skilled in the art to which the present application pertains to have a clearer understanding of the present application, the technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0023] Figure 1 FIG. 1 is a schematic view of a strip steel shearing device in one or more embodiments of the present application;

[0024] Figure 2 FIG. 2 is a schematic view of a guide plate in the strip steel shearing device in one or more embodiments of the present application; Figure 1

[0025] Figure 3 FIG. 4 is a flowchart of a method for using the strip steel shearing device in one or more embodiments of the present application.

[0026] BRIEF DESCRIPTION OF DRAWINGS

[0027] ​100, moon scissors; 110, shearing platform; 200, guide plate; 210, guide roller; 300, first lifting roller; 400, second lifting roller. DETAILED DESCRIPTION

[0028] In order for those skilled in the art to which the present application pertains to more clearly understand the present application, the technical solutions in the embodiments of the present application will be described clearly and completely below in conjunction with the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative labor fall within the scope of protection of the present application.

[0029] In addition, the reference numbers and / or reference letters can be repeated in different examples in the present application, and such repetition is for the purpose of simplification and clarity, and does not indicate the relationship between the various embodiments and / or settings discussed. In addition, various specific process and material examples are disclosed in the present application, but those of ordinary skill in the art can realize the application of other processes and / or the use of other materials.

[0030] It should be noted that the embodiments in the present application and the features in the embodiments can be combined with each other without conflict.

[0031] The embodiments of the present application disclose a strip steel shearing device, which can solve the technical problem that the prior art is easy to impact the edge of the strip steel, so as to realize fast and efficient shearing, improve the stability of the production process, improve the production efficiency, reduce the production cost, and enhance the market competitiveness.

[0032] The technical solutions of the present application will be described in detail below through specific embodiments:

[0033] Referring to Figure 1 and Figure 2 In the first aspect of the present application, a strip steel shearing device is disclosed, which comprises moon scissors 100, a guide plate 200, a first lifting roller 300, a second lifting roller 400, a first grating assembly, a second grating assembly, a third grating assembly, and a controller. The moon scissors 100 comprise a shearing platform 110, the guide plate 200 is installed on the shearing platform 110, and the guide plate 200 is arranged at an angle with the shearing platform 110. The first lifting roller 300 is installed at the entrance of the shearing platform 110, and the first lifting roller 300 is located on the side of the guide plate 200 away from the shearing platform 110. The second lifting roller 400 is installed at the outlet of the shearing platform 110. The first grating assembly, the second grating assembly, and the third grating assembly are arranged in order from top to bottom along the vertical direction. And the first grating assembly, the second grating assembly, and the third grating assembly are all electrically connected with the controller.

[0034] In the prior art, the strip steel is prone to be hit during shearing due to plate shape problems, resulting in poor shearing. The strip steel shearing device disclosed in the embodiment can preliminarily guide the strip steel through the guide plate 200, and the first lifting roller 300 and the second lifting roller 400 can lift the height of the strip steel when necessary, so that the strip steel can enter the shearing platform 110 more stably, the hitting phenomenon caused by the plate shape problem is reduced, the shearing quality is significantly improved, the defective product rate is reduced, the stability of the production process is greatly improved, the downtime and equipment damage caused by production accidents are reduced, and the production cost is reduced.

[0035] In some embodiments, the end of the guide plate 200 away from the shearing platform 110 is lower than the shearing platform 110, and the included angle between the guide plate 200 and the shearing platform 110 is 35-45 degrees. For example, the included angle between the guide plate 200 and the shearing platform 110 can be set to 40 degrees.

[0036] The end of the guide plate 200 away from the shearing platform 110 is lower than the shearing platform 110, and this design forms a natural guide slope. When the strip steel is transmitted from the direction of the welding machine device, it can more easily slide along the slope to the shearing platform 110, reducing the jamming and resistance of the strip steel when entering the shearing platform 110, making the transmission of the strip steel more smooth, and improving the continuity and stability of the entire shearing process.

[0037] The included angle between the guide plate 200 and the shearing platform 110 is 35-45 degrees, which is carefully designed. Within this angle range, the strip steel can smoothly slide along the guide plate 200 to the shearing platform 110 under the action of gravity, and the strip steel will not slide too fast due to an excessively large angle, which is difficult to control, thereby avoiding the situation that the strip steel hits or deviates from the predetermined position when entering the shearing platform 110.

[0038] In one embodiment, a plurality of guide rollers 210 are arranged on the guide plate 200, and the guide rollers 210 are arranged in sequence along the guide plate 200 towards the shearing platform 110, and the guide rollers 210 are rotationally connected with the guide plate 200.

[0039] When the strip steel is transmitted on the guide plate 200, a large friction force will be generated by directly contacting the surface of the guide plate 200. After the plurality of guide rollers 210 are arranged, the strip steel contacts the guide rollers 210, and the sliding friction between the strip steel and the guide plate 200 is converted into rolling friction between the strip steel and the guide rollers 210 due to the rotation of the guide rollers 210. The friction force of rolling friction is much smaller than that of sliding friction, which greatly reduces the resistance in the transmission process of the strip steel, so that the strip steel can more smoothly slide along the guide plate 200 to the shearing platform 110, and the energy loss and strip steel wear caused by friction are reduced.

[0040] The plurality of guide rollers 210 are arranged in sequence along the guide plate 200 in the direction towards the shearing platform 110, forming a continuous support and guide system. During the transmission of the strip steel, each guide roller 210 can provide stable support for the strip steel, preventing the strip steel from sagging, deviating or shaking on the guide plate 200. This stable support ensures that the strip steel can enter the shearing platform 110 in a stable and accurate manner, improving the stability of the strip steel transmission and ensuring the smooth progress of the shearing process.

[0041] In one embodiment, the stroke of the second lifting roller 400 is greater than the stroke of the first lifting roller 300.

[0042] In strip steel production, there can be various plate shape problems such as single-sided wave, double-sided wave, and sickle bend, and the severity of the plate shape problems at different parts can be different. When the strip steel enters the shearing area, the entrance (the position of the first lifting roller 300) may only have a slight plate shape problem locally, at which time the first lifting roller 300 only needs a small stroke to lift the strip steel to the appropriate position, so that it can smoothly enter the subsequent guide and shearing process. The exit (the position of the second lifting roller 400) may need a larger stroke to further adjust the strip steel to ensure that the strip steel leaves the shearing platform 110 in the correct attitude, avoiding subsequent problems such as coiling and stacking, due to deformation accumulation of the strip steel during transmission or further highlighting of the plate shape problem during shearing.

[0043] During the shearing process of the strip steel, the stress state and position of the strip steel may change as the shearing action progresses. The stroke of the second lifting roller 400 is greater than that of the first lifting roller 300, which can make larger adjustments to the strip steel during the shearing process according to the actual situation. For example, when shearing thick strip steel or performing special-shaped crescent shearing 100, the strip steel may deform greatly due to shearing force, and the larger stroke of the second lifting roller 400 can compensate for this deformation in time, ensuring the shearing quality and smooth transmission of the strip steel.

[0044] In one embodiment, the distance between the first grating assembly and the shearing platform 110 in the vertical direction is 150 mm, the distance between the second grating assembly and the shearing platform 110 in the vertical direction is 200 mm, and the distance between the third grating assembly and the shearing platform 110 in the vertical direction is 250 mm.

[0045] Different plate shapes of the strip steel have different heights, and the three groups of grating assemblies provided by the present application can monitor the height of the strip steel in real time. When the height of the strip steel is different, different grating assemblies are triggered, and the corresponding working mode is started. This design makes the device adaptable to various plate shapes of the strip steel, improves the versatility and practicality of the device, and expands its application range.

[0046] Through the above embodiment, the strip shearing device has the following beneficial effects or advantages: the strip shearing device disclosed by the application can better guide the strip into the shearing platform 110 by arranging the guide plate 200, the first lifting roller 300 and the second lifting roller 400, and reduce the situation that the strip collides with the crescent shears 100 trolley due to the strip shape problem, thereby avoiding the problem of one-side shearing of a large crescent and non-shearing of the other side or asymmetric shearing of both sides, and improving the shearing quality. The first grating assembly, the second grating assembly and the third grating assembly arranged in the vertical direction from top to bottom can trigger different working modes according to different height conditions of the strip, so that the device can adapt to strips of different shapes, and the versatility and adaptability of the device are improved. The arrangement of the full-automatic mode, the semi-automatic mode and the manual mode can flexibly select the working mode according to the actual situation of the strip, while ensuring the shearing quality, and improving the production efficiency.

[0047] Referring to Figure 3 , the technical scheme adopted to achieve the object of the application is that, in the second aspect of the application, a use method of the strip shearing device based on the above-mentioned embodiment is disclosed, comprising the following steps:

[0048] When the first grating is not triggered, it indicates that the strip shape is good, and the device starts the full-automatic mode. The weld or defect position of the strip is automatically positioned and stopped at the crescent shears 100, the crescent shears 100 automatically shears the strip, and the strip is automatically discharged after shearing. At this time, the uncoiler tension is 30KN.

[0049] When the first grating assembly is triggered, the first lifting roller 300 rises to the maximum height, and at the same time, the uncoiler tension is adjusted to 20KN, and the semi-automatic mode is started. When the strip moves, the operator controls the strip to move to the weld or defect position of the strip at the crescent shears 100, and then the crescent shears 100 automatically shears the strip, and the strip is automatically discharged after shearing.

[0050] When the second grating assembly is triggered, the second lifting roller 400 also rises to the maximum height, the uncoiler tension is adjusted to 8KN, and the semi-automatic mode is also started, and the operation mode is the same as when the first grating assembly is triggered.

[0051] When the third grating assembly is triggered, it indicates that the strip shape is poor, and the manual mode is started. When the strip moves, the operator controls the strip to move to the weld or defect position of the strip at the crescent shears 100, and then manually positions the shearing depth by the operator, and manually discharges the strip after shearing. At this time, the uncoiler tension is 0KN.

[0052] The full-automatic mode can realize automatic positioning, cutting and discharging of the strip steel when the strip steel profile is good, without too much manual intervention, greatly improving the production efficiency. The semi-automatic mode and manual mode provide flexible operation for the operator when the strip steel profile is poor, improving the production efficiency as much as possible under the premise of ensuring the cutting quality.

[0053] The full-automatic mode realizes the automation of a series of operations such as automatic positioning, stopping, cutting and discharging of the strip steel weld or defect position, without manual operation of the equipment to find the weld or defect position, and without manual control of the cutting and discharging process. This greatly shortens the production cycle, reduces the time and waiting time of manual operation, enables the equipment to run continuously and efficiently, and improves the overall production efficiency. Since the entire process is automated, the strip steel can be continuously transported and cut, avoiding production interruptions and pauses caused by manual operation. Continuous production can fully utilize the production capacity of the equipment to meet the needs of large-scale production and improve the production efficiency of the enterprise.

[0054] In the semi-automatic mode, when the strip steel appears abnormal (such as having a weld or defect), the operator intervenes to control the movement of the strip steel to the appropriate position. Compared with completely manual operation, the crescent shear 100 can still automatically complete the cutting and discharging process, greatly shortening the processing time under abnormal conditions. The operator only needs to focus on moving the specific position of the strip steel to the crescent shear 100, avoiding complex and time-consuming operations such as manual cutting and discharging, and improving the overall production efficiency. Although the full-automatic mode is efficient, it may not be able to fully cope with some complex or difficult to accurately predict abnormal conditions. The semi-automatic mode gives the operator certain control, and the operator can flexibly adjust the position of the strip steel according to the actual situation to ensure that the weld or defect is accurately located at the crescent shear 100. This flexibility enables the equipment to better adapt to various complex production conditions and reduces production stagnation caused by abnormal conditions.

[0055] When the strip steel has extremely complex and irregular welds or defects, or the automatic and semi-automatic systems of the equipment fail to accurately identify and locate, the manual mode gives the operator complete control. The operator can use their experience and observation to flexibly adjust the position of the strip steel and accurately place the weld or defect at the crescent shear 100, ensuring that the cutting operation can be performed on the abnormal part, avoiding production problems caused by automatic system misjudgment or inability to handle. During production, some emergencies may suddenly occur, such as severe strip steel jamming, sudden equipment vibration, etc. The manual mode allows the operator to quickly intervene and directly control the movement and cutting of the strip steel, promptly eliminate faults, prevent accidents from expanding, and ensure the safety of the equipment and personnel.

[0056] When the first grating is not triggered, it indicates that the strip steel is in a normal transmission state, at this time the opening mill tension is set to 30KN. This appropriate tension can ensure that the strip steel is smoothly discharged from the opening mill, maintains a certain straightness during transmission, avoids phenomena such as relaxation and slipping, and ensures that the strip steel can enter the subsequent shearing equipment according to the predetermined path and speed, laying a foundation for high-quality shearing operation.

[0057] With different grating components being triggered, it indicates that different degrees of abnormal situations occur in the strip steel transmission process. For example, when the first grating component is triggered, the strip steel may have a slight deviation or jitter, at this time the opening mill tension is adjusted to 20KN, reducing the tension can reduce the pulling force of the strip steel during transmission, avoid further deformation or damage of the strip steel due to excessive tension, and also help the subsequent equipment to fine-tune the strip steel to restore it to a normal transmission state.

[0058] When the second grating component is triggered, it means that the abnormal situation of the strip steel may be more serious, such as the strip steel having a large deformation or blocking sign. At this time, the opening mill tension is reduced to 8KN, further reducing the pulling force of the strip steel to prevent the strip steel from breaking due to excessive stretching, protecting the integrity of the strip steel and reducing the generation of waste products.

[0059] When the third grating component is triggered, the strip steel may have a serious jamming or other faults that cannot be automatically handled. At this time, the opening mill tension is reduced to 0KN, completely stopping the pulling of the strip steel, avoiding the equipment to continue running in the abnormal state of the strip steel to cause more serious equipment damage.

[0060] Reasonable adjustment of the opening mill tension is crucial for stable transmission of the strip steel and shearing quality. The present application adjusts the opening mill tension according to different grating triggering conditions. When the strip steel plate type is good, a higher tension is maintained to ensure stable transmission of the strip steel; when the strip steel plate type is poor, the tension is reduced to reduce the jitter and deformation of the strip steel, thereby improving the shearing quality. This tension control method is more scientific and reasonable, which helps to improve the stability of the production process and product quality.

[0061] In order to make the purpose, technical scheme and advantages of the embodiments of the present application more clear, the technical scheme of the embodiments of the present application is described clearly and completely above combined with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, not all the embodiments. The components of the embodiments of the present application described and shown in the drawings here can be arranged and designed in various different configurations.

[0062] Therefore, the above detailed description of the embodiments of the application disclosed in the specification is not intended to limit the scope of the application, but merely represents selected embodiments of the application. All other embodiments obtained by persons of ordinary skill in the art based on the embodiments of the application without creative work fall within the scope of the application.

[0063] It should be noted that similar reference numerals and letters refer to similar items throughout the accompanying drawings, and therefore, once an item is defined in one drawing, it is not necessary to further define and explain it in subsequent drawings.

[0064] In the description of the application, it should be understood that the terms indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the drawings, and are only for the purpose of facilitating the description of the application and simplifying the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the application.

[0065] In the present application, unless otherwise explicitly specified and limited, the terms "mounting", "connection", "connecting", "fixing" and the like should be understood broadly, for example, it can be fixed connection, or detachable connection, or integral; it can be mechanical connection, or electrical connection; it can be direct connection, or indirect connection through an intermediate medium; it can be the internal communication of two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0066] In the present application, unless otherwise explicitly specified and limited, the first feature above or below the second feature can include that the first and second features are in direct contact, or that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, the first feature above, above and above the second feature includes that the first feature is directly above and obliquely above the second feature, or only indicates that the horizontal height of the first feature is higher than that of the second feature. The first feature below, below and below the second feature includes that the first feature is directly below and obliquely below the second feature, or only indicates that the horizontal height of the first feature is less than that of the second feature.

[0067] Although the preferred embodiments of the present application have been described, those of ordinary skill in the art can make further changes and modifications to the embodiments once they have been familiar with the basic inventive concept. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments and all changes and modifications falling within the scope of the present application.

[0068] Obviously, many modifications and variations of the present application are possible in light of the above teachings. It is, therefore, to be understood that within the scope of the appended claims and their equivalents, the application can be practiced otherwise than as specifically described.

Claims

1. A strip steel shearing device, characterized in that: include: Crescent shears, the crescent shears comprising a shearing platform; A guide plate, the guide plate being mounted on the shearing platform and being arranged at an angle to the shearing platform; a first lifting roller, the first lifting roller being installed at the entrance of the shearing platform and being located on a side of the guide plate facing away from the shearing platform; a second lifting roller, the second lifting roller being installed at the outlet of the shearing platform; A first grating component, a second grating component and a third grating component, wherein the first grating component, the second grating component and the third grating component are arranged in sequence from top to bottom along a vertical direction; and A controller is provided, wherein the first grating component, the second grating component and the third grating component are all electrically connected to the controller.

2. The strip steel shearing device according to claim 1, characterized in that: One end of the guide plate facing away from the shearing platform is lower than the shearing platform, and the angle between the guide plate and the shearing platform is 35 degrees to 45 degrees.

3. The strip steel shearing device according to claim 1, characterized in that: A plurality of guide rollers are provided on the guide plate, and the guide rollers are arranged in sequence along the direction from the guide plate toward the shearing platform, and the guide rollers are rotatably connected to the guide plate.

4. The strip steel shearing device according to claim 1, characterized in that: The stroke of the second lifting roller is greater than the stroke of the first lifting roller.

5. The strip steel shearing device according to claim 1, characterized in that: The vertical distance between the first grating component and the shearing platform is 150 mm, the vertical distance between the second grating component and the shearing platform is 200 mm, and the vertical distance between the third grating component and the shearing platform is 250 mm.

6. A method for using the strip steel shearing device according to any one of claims 1 to 5, characterized in that: The steps include: When the first light barrier is not triggered, starting the full-automatic mode; When the first grating assembly is triggered, the first lifting roller rises to a maximum height, and the semi-automatic mode is started; When the second grating assembly is triggered, the second lifting roller also rises to the maximum height, starting the semi-automatic mode; When the third grating assembly is triggered, the manual mode is activated.

7. The method of use according to claim 6, characterized in that: When the first grating is not triggered, the tension of the uncoiler is 30KN; When the first grating assembly is triggered, the uncoiler tension is 20KN; When the second grating assembly is triggered, the uncoiler tension is 8KN; When the third grating assembly is triggered, the tension of the uncoiler is 0 kN.

8. The method of use according to claim 6, characterized in that: In the fully automatic mode, the weld or defect position of the steel strip is automatically positioned and stopped at the crescent shear, and the crescent shear automatically shears the steel strip, and the material is automatically discharged after shearing is completed.

9. The method of use according to claim 6, wherein: In the semi-automatic mode, when the strip moves, the operator controls the strip to move to the position where the weld or defect of the strip is located at the crescent shear, and then the crescent shear automatically shears the strip and automatically discharges the material after shearing is completed.

10. The method of use according to claim 6, characterized in that: In the manual mode, when the strip moves, the operator controls the strip to move until the weld or defect position of the strip is located at the crescent shear, and then the operator manually positions the shearing depth. After the shearing is completed, the material is manually discharged.

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