Air flow edge stabilizing and anti-blocking device and method for high-speed shearing

Abstract

This invention belongs to the technical field of high-speed finishing shearing equipment for metal strips, and specifically relates to an airflow edge stabilization and anti-clogging device and method for high-speed shearing. The device includes a streamlined waste edge guide chute, with multiple sets of guide holes on the top plate of the upper chute. These guide holes are connected to a graded pressure pneumatic control module and are evenly arranged along the length of the guide chute. The outlet direction is downward and inclined towards the discharge direction, forming an angle of 25°–35° with the strip's running direction. The graded pressure pneumatic control module outputs an adjustable air pressure of 0.2–0.6 MPa, forming a constrained air curtain that suspends and constrains the waste edge in the middle of the guide chute, suppressing waste edge swaying, flying, entanglement, and clogging. This invention is installed behind the disc shear, supplying air to the guide hole sets to form an inclined constrained air curtain that stabilizes the waste edge in the middle of the guide chute without contact. It is suitable for thin metal strips with a thickness of 0.15–0.55 mm and a linear speed of 400–1000 m / min, and has advantages such as simple structure, no need for vacuum or mechanical clamping, strong adaptability, and stable operation.

Description

Technical Field

[0001] This invention relates to the field of high-speed finishing and shearing equipment for metal sheets and strips, specifically to an airflow edge stabilization and anti-blocking device and method for high-speed shearing. Background Technology

[0002] In the production processes of high-end, lightweight metal sheets and strips such as tinplate, silicon steel sheets, aluminum foil, and aluminum alloy strips, high-speed precision shearing is one of the key processes determining finished product quality and production efficiency. Disc shears, as a continuous longitudinal shearing device, are widely used in the edge trimming and slitting operations of metal sheets and strips. The narrow strips of waste edge generated after shearing need to be smoothly conveyed to the edge rolling machine or edge crusher via guide troughs; otherwise, if the waste edge accumulates and clogs in the guide troughs, it will directly lead to production line shutdown, seriously affecting production continuity and yield.

[0003] As downstream users increasingly demand higher material utilization and production efficiency, the operating speed of metal strip finishing production lines has increased from the traditional 200-300 m / min to 400-1000 m / min or even higher. Simultaneously, to meet the requirements of lightweighting and high precision, the thickness of strips such as tinplate, silicon steel, and aluminum plates is continuously decreasing, currently reaching an extremely thin range of 0.15-0.55 mm. Under this combined "ultra-thin + ultra-high-speed" operating condition, the behavior control of waste edges has become a recognized technical bottleneck in the industry. After being sheared by the disc shear, the width of the waste edge is typically only a few millimeters to tens of millimeters, with extremely thin thickness and very low bending stiffness. During high-speed movement, it is highly susceptible to airflow disturbances, mechanical vibrations, and friction from the inner wall of the guide channel, resulting in violent swaying, vertical flying, horizontal swinging, and even self-entanglement and knotting. Once the waste edge loses stability, it will form a "bridging" blockage at the guide channel inlet or inside, preventing further forward transport and rapidly accumulating, causing blockage near the disc shear plate. At this point, the operator must immediately stop the machine and manually clear the clogged waste edges. This process can take anywhere from ten minutes to over half an hour, resulting not only in significant waste of strip material but also a substantial increase in safety risks for the operator. To address these issues, existing technologies primarily employ the following solutions: One option is a vacuum edge-rolling or negative pressure conveying system. This solution creates a negative pressure zone inside the guide groove or at the inlet of the edge-rolling machine, using suction to adsorb the waste edge onto the surface of the guide groove or suck it into the conveying pipeline. However, vacuum systems require high-power vacuum pumps, sealed chambers, and complex piping, resulting in high equipment investment and energy consumption. More importantly, thin waste edges tend to adhere tightly to the inner wall of the guide groove under negative pressure, generating excessive frictional resistance, which can lead to the waste edge breaking or clogging the suction port. In addition, vacuum pipelines are easily clogged by fine waste edge burrs, requiring frequent maintenance and resulting in poor reliability in actual operation.

[0004] Second, there is the mechanical pressure roller or guide wheel constraint device. This solution uses upper and lower pressure rollers or side guide wheels to forcibly clamp and guide the waste edge. For extremely thin strips with a thickness of 0.15 to 0.55 mm, mechanical contact can easily cause wrinkles, tears, or even breakage of the waste edge. At the same time, the high-speed relative motion between the pressure roller and the waste edge will cause severe wear. The surface of the pressure roller will quickly be worn with grooves, losing its constraint function and requiring frequent replacement, resulting in extremely high maintenance costs.

[0005] Thirdly, there are ordinary non-powered guide channels. Traditional guide channels are simply steel plate bending channels that rely on the inertia of the waste edge itself to pass through. They can be used barely under low-speed, thick-material conditions, but under high-speed, thin-material conditions, they are basically unable to restrain the swaying behavior of the waste edge, resulting in an extremely high blockage rate, and can no longer meet the requirements of modern high-speed production lines.

[0006] In summary, existing technologies lack a waste edge stabilizing device that is simple in structure, maintenance-free, requires no vacuum or mechanical contact, and can adapt to different speeds and materials. Therefore, developing an airflow-based edge stabilizing and anti-clogging device that can fundamentally solve the problems of swaying, entanglement, and blockage of thin, light waste edges during high-speed shearing has significant industrial application value. Summary of the Invention

[0007] To address the aforementioned problems, the purpose of this invention is to provide an airflow-based edge stabilization and anti-clogging device and method for high-speed shearing. This invention eliminates the need for vacuum pumps, negative pressure chambers, sealed pipelines, or any moving clamping components. Instead, it only requires a set of guide holes on the top plate of the guide channel and connects to a graded pressure pneumatic module. The guide holes are evenly arranged along the length of the guide channel. The airflow is downward and inclined in the discharge direction, forming an angle of 25° to 35° with the running direction of the strip, thus forming a continuous and stable constraint air curtain. This air curtain actively confines the waste edge in the middle of the guide channel, effectively suppressing the waste edge from flying up and down, swinging left and right, and entanglement, eliminating "bridging" blockage, and significantly improving the continuous operation time of the production line.

[0008] To achieve the above objectives, the present invention provides the following technical solution: an airflow edge stabilization and anti-blocking device for high-speed shearing, comprising a streamlined waste edge guide chute, a chute top plate on the upper part of the waste edge guide chute, a plurality of guide hole groups on the chute top plate, the guide hole groups being connected to a graded pressure pneumatic control module, the guide hole groups being evenly arranged along the length direction of the waste edge guide chute, their outlet direction being downward and inclined towards the discharge direction, the angle between the outlet direction of the guide hole groups and the strip running direction being 25° to 35°, the graded pressure pneumatic control module outputting adjustable air pressure to form a constraint air curtain, the constraint air curtain suspending and constraining the waste edge in the middle of the waste edge guide chute, the outlet of the waste edge guide chute being connected to a large guide chute, the large guide chute being connected to the inlet of a negative pressure automatic edge rolling machine.

[0009] Furthermore, the graded pressure pneumatic control module includes an air source, an air source processing unit, a proportional pressure reducing valve, multiple solenoid valves, and a throttle valve connected in sequence. The throttle valve is respectively connected to an operating side guide hole group and a transmission side guide hole group.

[0010] Furthermore, the output air pressure range of the graded pressure pneumatic control module is 0.2 to 0.6 MPa. When the linear speed of the strip is 400 to 600 m / min, a low pressure of 0.2 to 0.3 MPa is used; when the linear speed of the strip is 600 to 1000 m / min, a high pressure of 0.3 to 0.6 MPa is used.

[0011] Furthermore, the waste edge guide groove has a flared streamlined structure with smooth rounded corners on the inner wall, polished rounded corners R≥30mm, and no sharp corners or steps. The guide hole group is arranged in 1 to 5 groups along the waste edge guide groove, covering the full width operating range of the waste edge.

[0012] Furthermore, a steel plate is welded to the top plate of the guide channel, and the welding adopts full welding seal. A guide hole group is processed on the steel plate and the top plate of the guide channel. The guide hole group includes oblique small holes and longitudinal large holes. The oblique small holes are evenly opened along the width direction of the waste edge guide channel. The oblique small holes face obliquely downwards from the outlet of the waste edge guide channel. The longitudinal large holes are arranged perpendicular to the oblique small holes and are connected to all the oblique small holes, connecting all the oblique small holes in series to form an integrated air circuit. A threaded hole is processed at one end of the longitudinal large hole, and the pneumatic connector of the graded pressure pneumatic control module is sealed to the longitudinal large hole through the thread. The outer port of the oblique small holes is provided with a plug weld.

[0013] A method for preventing airflow edge blockage during high-speed shearing, using an airflow edge blockage prevention device for high-speed shearing as described above, includes the following steps: Step 1: Install the airflow edge stabilizing and anti-clogging device for high-speed shearing behind the upper and lower blades of the disc shear and in front of the deburring roller, and guide the sheared waste edge into the streamlined waste edge guide groove. Step 2: Compressed air is supplied to multiple sets of inclined guide holes arranged on the upper part of the chute top plate of the waste side guide chute through the graded pressure pneumatic control module. Step 3: The airflow is directed downwards from the guide hole group and sprayed out at an angle of 25° to 35° with the strip running direction, forming a constrained air curtain inside the waste edge guide channel. The constrained air curtain suspends and stabilizes the waste edge in the middle of the waste edge guide channel without contact, thereby suppressing the swaying, flying, entanglement and blockage of the waste edge.

[0014] This method is applicable to strip thicknesses ranging from 0.15 to 0.55 mm and is suitable for production line speeds ranging from 400 to 1000 m / min.

[0015] Compared with existing technologies, this invention provides an airflow-based edge-stabilizing and anti-clogging device and method for high-speed shearing, which has the following beneficial effects: 1. This invention uses an inclined constraint air curtain to suspend the waste edge in the middle of the guide groove, completely avoiding contact friction and squeezing caused by mechanical pressure rollers, guide wheels, or vacuum adsorption. For extremely thin strips with a thickness of only 0.15-0.55mm, wrinkles, tears, or surface scratches will not occur, fundamentally ensuring the quality of the waste edge and the base material. 2. This invention does not require a vacuum pump, negative pressure chamber, sealed pipeline, or any moving clamping components. It only opens a guide hole group on the top plate of the guide groove and connects it to a graded pressure pneumatic module. The entire device has no vulnerable parts, and there are no problems such as blocked suction ports or worn pressure rollers. The failure rate is extremely low, and long-term maintenance-free operation can be achieved. 3. This invention outputs an adjustable air pressure of 0.2-0.6MPa through a graded pressure pneumatic control module, automatically matching different linear velocities (400-1000m / min) and different materials (tinplate, silicon steel, aluminum plate, etc.). Low-speed thin materials use low pressure (0.2-0.3MPa), while high-speed thick materials use high pressure (0.3-0.6MPa) to ensure that the waste edge can be stably suspended, without swaying or clogging, under various working conditions. 4. The guide hole group of this invention is evenly arranged along the length of the guide groove. The airflow is downward and inclined in the direction of material discharge, forming an angle of 25° to 35° with the running direction of the strip, forming a continuous and stable constraint air curtain. This air curtain actively restricts the waste edge in the middle of the guide groove, effectively suppressing the waste edge from flying up and down, swinging left and right, and entanglement, eliminating the "bridging" clogging phenomenon, and significantly improving the continuous running time of the production line. 5. This invention allows for direct opening of holes or installation of nozzles on the existing waste edge guide groove behind the disc shear, without the need to replace the entire guide groove or modify the main unit. The graded pressure pneumatic system can be controlled independently of the main unit or linked with the main unit, and is suitable for ultra-high-speed edge cutting production lines for various thin metal strips such as tinplate, silicon steel, and aluminum plate. It is easy to modify and has good versatility.

[0016] The following will provide further explanation in conjunction with the accompanying drawings. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the structure of an airflow stabilization and anti-blocking device for high-speed shearing according to the present invention.

[0018] Figure 2 This is a cross-sectional view of the chute and the arrangement of the airflow holes of the present invention.

[0019] Figure 3 This is the present invention. Figure 2 EE sectional view.

[0020] Figure 4 This is a schematic diagram of the graded pressure pneumatic control module of the present invention.

[0021] Explanation of reference numerals in the attached drawings: 1-Upper blade of the disc shear; 2-Lower blade of the disc shear; 3-Waste edge guide groove; 4-Deburring roller; 5-Waste edge; 6-Strip material; 7-Large guide groove; 8-Negative pressure automatic edge rolling machine; 11-Chutter top plate; 12-Steel plate; 13-Guide hole group; 14-Constraint air curtain; 15-Slanted small hole; 16-Longitudinal large hole; 17-Plug weld; 21-Air source; 22-Air source treatment unit; 23-Proportional pressure reducing valve; 24-Solenoid valve; 25-Throttle valve; 26-Operating side guide hole group; 27-Transmission side guide hole group. Detailed Implementation

[0022] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0023] Example 1 Reference Figure 1-4 A high-speed shearing airflow edge stabilization and anti-blocking device is characterized by: a streamlined waste edge guide trough 3, a chute top plate 11 on the upper part of the waste edge guide trough 3, multiple sets of guide hole groups 13 on the chute top plate 11, the guide hole groups 13 being connected to a graded pressure pneumatic control module, the guide hole groups 13 being evenly arranged along the length direction of the waste edge guide trough 3, their outlet direction being downward and inclined towards the discharge direction, the angle between the outlet direction of the guide hole groups 13 and the running direction of the strip 6 being 25° to 35°, the graded pressure pneumatic control module outputting adjustable air pressure to form a constraint air curtain 14, the constraint air curtain 14 suspending and constraining the waste edge 5 in the middle of the waste edge guide trough 3, the outlet of the waste edge guide trough 3 being connected to a large guide trough 7, the large guide trough 7 being connected to the inlet of a negative pressure automatic edge rolling machine 8.

[0024] In use, this device is installed behind the upper cutter head 1 and the lower cutter head 2 of the disc shear, and in front of the deburring roller 4. The inlet of the waste edge guide chute 3 is directly opposite the shearing and discharge position of the disc shear, and the outlet is connected to the large guide chute 7, which is connected to the inlet of the negative pressure-free automatic edge rolling machine 8. The disc shear is started for high-speed shearing, and air is supplied to multiple sets of guide holes 13 on the top plate 11 of the chute through the graded pressure pneumatic control module. The airflow is sprayed downward from the guide hole set 13 and inclined towards the discharge direction, forming an angle of 25° to 35° with the running direction of the strip 6, forming a continuous constraint air curtain 14 inside the waste edge guide chute 3. The waste edge 5 generated after shearing enters the waste edge guide chute 3, is suspended and constrained in the middle of the waste edge guide chute 3 under the action of the constraint air curtain 14, and is stably conveyed forward along the guide chute direction, and enters the negative pressure-free automatic edge rolling machine 8 through the large guide chute 7 to complete the rolling. The constrained air curtain 14 of this invention prevents the waste edge 5 from contacting the inner wall of the guide trough, effectively suppressing the swaying, flying, entanglement, and blockage of the waste edge 5. The waste edge 5 is conveyed smoothly without jamming, and operates stably continuously. The device has a simple structure, requires no vacuum or mechanical clamping, and is suitable for thin metal strips with a thickness of 0.15-0.55mm and a linear speed of 400-1000m / min.

[0025] Example 2 Based on Embodiment 1, in this embodiment, preferably, the graded pressure pneumatic control module includes an air source 21, an air source processing unit 22, a proportional pressure reducing valve 23, multiple solenoid valves 24 and a throttle valve 25 connected in sequence, and the throttle valve 25 is respectively connected to an operating side guide hole group 26 and a transmission side guide hole group 27.

[0026] In this invention, external compressed air enters the air source processing unit 22 via air source 21. After filtration, pressure regulation, and dehydration, it enters the proportional pressure reducing valve 23. The proportional pressure reducing valve 23 automatically adjusts the output air pressure (0.2–0.6 MPa) according to the material and speed of the strip 6. The regulated airflow is controlled by multiple solenoid valves 24, which are linked to the disc shear main unit—supplying air synchronously when shearing starts and cutting off air synchronously when shearing stops. The airflow is then throttled by the flow rate and velocity valve 25 and delivered to the operating side guide hole group 26 and the transmission side guide hole group 27, respectively, and ejected from the guide hole group 13 to form the constraint air curtain 14. This invention achieves graded control of the pressure and flow rate of the constraint air curtain 14 through the precise adjustment of the proportional pressure reducing valve 23 and the flow rate valve 25, automatically matching the stable requirements of strips with different speeds and materials. The solenoid valves 24 are linked to the main unit to avoid unnecessary air supply and save energy. The operating side and the transmission side are supplied with air independently, and can be adjusted independently to address the differences in waste gas on both sides, making it highly adaptable.

[0027] Example 3 Based on Example 1, in this embodiment, preferably, the output air pressure range of the graded pressure pneumatic control module is 0.2 to 0.6 MPa. When the linear speed of the strip 6 is 400 to 600 m / min, a low pressure of 0.2 to 0.3 MPa is used; when the linear speed of the strip 6 is 600 to 1000 m / min, a high pressure of 0.3 to 0.6 MPa is used.

[0028] In use, the air pressure setting is automatically or manually selected based on the actual linear speed of the strip 6. When the speed is 400–600 m / min, the proportional pressure reducing valve 23 sets the output air pressure between 0.2 and 0.3 MPa; when the speed is 600–1000 m / min, the output air pressure is set between 0.3 and 0.6 MPa. For different materials within the same speed range, such as aluminum plates and silicon steel, further fine-tuning can be achieved through the throttle valve 25. After the airflow is ejected through the guide hole group 13, it forms a constraint air curtain 14 of corresponding intensity. This invention uses low pressure at low speeds to prevent excessive airflow from blowing away the extremely thin waste edge; and uses high pressure at high speeds to provide sufficient constraint force to suppress waste edge swaying. The graded matching mechanism enables the device to achieve stable suspension across the entire speed range of 400–1000 m / min, eliminating the need for frequent manual adjustments, simplifying operation, and enhancing adaptability.

[0029] Example 4 Based on Example 1, in this embodiment, preferably, the waste edge guide groove 3 is a flared streamlined structure with smooth rounded corners on the inner wall, polished rounded corners R≥30mm, without sharp corners or steps, and the guide hole group 13 is arranged in 1 to 5 groups along the waste edge guide groove 3, covering the full width operating range of the waste edge 5.

[0030] In this invention, the waste edge 5, after being sheared, enters the waste edge guide channel 3 from the disc shear outlet. The waste edge guide channel 3 has a small inlet and gradually widens at the outlet, forming a flared, streamlined channel. The inner wall is polished with a radius R ≥ 30mm, without any sharp corners or steps. 1 to 5 sets of guide holes 13 are evenly arranged along the length of the guide channel to ensure that a constrained air curtain 14 covers the entire width range that the waste edge 5 may pass through from the inlet to the outlet. The flared structure of this invention reduces the probability of the waste edge 5 getting stuck in the guide channel, and the smooth rounded transition of the inner wall prevents the waste edge 5 from being scratched or caught by sharp corners. The continuous air curtain formed by multiple sets of guide holes 13 covers the entire operating path. Even if the waste edge 5 deviates slightly in the guide channel, it can be pushed back to the center by the subsequent air curtain, effectively preventing "bridging" blockage.

[0031] Example 5 Based on Embodiment 1, in this embodiment, preferably, a steel plate 12 is welded onto the top plate 11 of the guide channel, and the welding adopts full welding sealing. A guide hole group 13 is processed on the steel plate 12 and the top plate 11 of the guide channel. The guide hole group 13 includes oblique small holes 15 and longitudinal large holes 16. The oblique small holes 15 are evenly opened along the width direction of the waste edge guide channel 3. The oblique small holes 15 face obliquely downwards from the outlet of the waste edge guide channel 3. The longitudinal large holes 16 are arranged perpendicular to the oblique small holes 15 and are connected to all the oblique small holes 15, connecting all the oblique small holes 15 in series to form an integrated air passage. A threaded hole is processed at one end of the longitudinal large hole 16, and the pneumatic connector of the graded pressure pneumatic control module is sealed and connected to the longitudinal large hole 16 through the thread. A plug weld 17 is provided on the outer port of the oblique small hole 15.

[0032] In this invention, a steel plate 12 is welded onto the top plate 11 of the guide channel, with full welding to ensure airtightness. Longitudinal large holes 16 are machined on the steel plate 12 and the top plate 11 of the guide channel. Multiple oblique small holes 15 are then drilled along the width of the waste edge guide channel 3, all of which are perpendicular to the longitudinal large holes 16. A threaded hole is machined at one end of the longitudinal large hole 16, into which a pneumatic connector is screwed and sealed to the graded pressure pneumatic control module. The outer port of the oblique small holes 15, i.e., the side not blown into the guide channel, is sealed with a plug weld 17. Compressed air enters the longitudinal large hole 16 through the pneumatic connector, and is then evenly distributed to each oblique small hole 15, blowing into the interior of the guide channel from the inner outlet. The full welding seal of this invention ensures no air leakage, and all compressed air acts on the waste edge 5 through the oblique small holes 15, resulting in high airflow utilization. The longitudinal large hole 16 serves as a common air chamber, ensuring uniform air output from each oblique small hole 15 and avoiding localized pressure unevenness. The plugging weld 17 has a simple and reliable structure, requiring no additional seals. This processing method can be directly modified on existing guide channels, resulting in low cost and short cycle time.

[0033] Example 6 A method for preventing airflow edge blockage during high-speed shearing, using an airflow edge blockage prevention device for high-speed shearing as described above, includes the following steps: Step 1: Install the airflow edge stabilizing and anti-clogging device for high-speed shearing behind the upper blade 1 and the lower blade 2 of the disc shear, and in front of the deburring roller 4, and guide the sheared waste edge 5 into the streamlined waste edge guide groove 3. Step 2: Compressed air is supplied to multiple sets of inclined guide holes 13 arranged on the top plate 11 of the chute of the waste side guide chute 3 through the graded pressure pneumatic control module. Step 3: The airflow is directed downward from the guide hole group 13 and sprayed out at an angle of 25° to 35° with the running direction of the strip 6, forming a constraint air curtain 14 inside the waste edge guide channel 3. The constraint air curtain 14 suspends the waste edge 5 in non-contact and stabilizes it in the middle of the waste edge guide channel 3, thereby suppressing the swaying, flying, entanglement and blockage of the waste edge 5.

[0034] This method is applicable to strip 6 with a thickness range of 0.15 to 0.55 mm and is suitable for production line speeds ranging from 400 to 1000 m / min.

[0035] Example 7 An aluminum plate with a thickness of 0.3 mm and a linear velocity of 800 m / min is processed using an airflow edge-stabilizing and anti-clogging device for high-speed shearing as described in Example 1. The specific process is as follows: This device is installed behind the upper cutter head 1 and the lower cutter head 2 of the disc shear, and in front of the deburring roller 4. The inlet of the waste edge guide chute 3 is directly opposite the shearing and discharge position of the disc shear, and the outlet connects to the large guide chute 7 and the negative pressure-free automatic edge rolling machine 8. The strip 6 is a 0.3mm thick aluminum plate, and the production line speed is set to 800m / min.

[0036] Simultaneously with the start of the disc shear, air is supplied to the guide hole group 13 via the graded pressure pneumatic control module. Based on a speed of 800 m / min, which falls within the 600–1000 m / min range, the system automatically adjusts the air pressure to 0.4 MPa. After being filtered, pressure-regulated, and dehydrated by the air source treatment unit 22, the compressed air is reduced to 0.4 MPa by the proportional pressure reducing valve 23. The solenoid valve 24 opens, and the airflow is distributed to the operating side guide hole group 26 and the transmission side guide hole group 27 via the throttle valve 25. The oblique small holes 15 in the guide hole group 13 direct the airflow downwards and at an angle in the discharge direction, forming an angle of approximately 30° with the running direction of the strip 6, creating a continuous and stable constrained air curtain 14 inside the waste edge guide chute 3.

[0037] The aluminum scrap edge 5, which is about 15mm wide after shearing, enters the scrap edge guide trough 3. Under the action of the constraint air curtain 14, it is suspended in the middle of the scrap edge guide trough 3 and is conveyed forward in a straight and stable state without swaying. It then enters the negative pressure-free automatic edge rolling machine 8 through the large guide trough 7 to complete the rolling.

[0038] Technical Results: Waste edge 5 is completely suspended in the middle of waste edge guide trough 3, without contact with the inner wall of waste edge guide trough 3, and there is no swaying, jumping up and down, or swinging left and right. At the outlet of waste edge guide trough 3, waste edge 5 maintains a stable posture and smoothly enters the negative pressure-free automatic edge rolling machine 8 without blockage, edge breakage, or entanglement. No trough blockage occurred during 8 hours of continuous operation, and production efficiency increased by approximately 35% compared to when this device was not used. The aluminum plate surface is free of scratches, waste edge 5 is wrinkle-free, and the edge rolling is neat and uniform.

[0039] Example 8 The airflow edge-stabilizing and anti-clogging device for high-speed shearing, as described in Example 1, is used to process silicon steel with a thickness of 0.25 mm and a linear velocity of 1000 m / min. The specific process is as follows: In this embodiment, strip 6 is a 0.25mm thick silicon steel sheet, and the production line speed reaches 1000m / min. The device installation position is the same as in Embodiment 1. Due to the high speed of 1000m / min, the graded pressure pneumatic control module automatically sets the output air pressure to 0.5MPa.

[0040] Compressed air is processed by the air source treatment unit 22 and reduced to 0.5 MPa by the proportional pressure reducing valve 23 before being supplied to the guide hole group 13 through the solenoid valve 24 and the throttle valve 25. The airflow is ejected from the oblique small hole 15 at an angle of approximately 32° with the running direction of the strip 6, forming a strong and stable confining air curtain 14 within the waste edge guide chute 3. The silicon steel waste edge 5 is extremely thin at 0.25 mm and has low rigidity, making it prone to flying during high-speed movement. However, under the active limiting effect of the confining air curtain 14, the waste edge 5 is stably pressed into the middle of the waste edge guide chute 3, avoiding contact with the top plate 11 of the chute and the side wall of the waste edge guide chute 3, as well as its own entanglement.

[0041] Technical Results: Under ultra-high-speed shearing conditions of 1000 m / min, the waste edge 5 moves smoothly along the centerline of the waste edge guide trough 3 without any entanglement, knotting, or blockage. After 4 hours of continuous production, there were zero blockages. The waste edge 5 remained unbroken, and its conveying at the inlet of the negative pressure-free automatic edge rolling machine 8 was smooth. Compared to an average blockage every 30 minutes without this device, the overall equipment utilization rate increased from 62% to 94%. Furthermore, since manual cleaning of blockages is unnecessary, the safety risks to operators are significantly reduced.

[0042] Example 9 The airflow edge-stabilizing and anti-clogging device for high-speed shearing, as described in Example 1, is used to process tin-plated sheets with a thickness of 0.55 mm and a linear speed of 600 m / min. The specific process is as follows: In this embodiment, strip 6 is a 0.55mm thick tin-plated sheet, and the production line speed is 600m / min. This speed is in the range of 400-600m / min, and the graded pressure pneumatic control module automatically adjusts the air pressure to 0.35MPa.

[0043] Airflow is ejected from the oblique orifice 15 at an angle of approximately 28°, forming a relatively gentle yet sufficiently restraining air curtain 14. Due to the relatively thick tinplate of 0.55mm, the bending stiffness of the waste edge 5 is slightly higher than in the previous two embodiments, requiring less stabilizing force. The low-pressure restraining air curtain 14 is sufficient to suspend the waste edge 5 in the middle of the waste edge guide trough 3 without causing it to vibrate due to excessive airflow.

[0044] Technical Results: Waste edge 5 runs smoothly within the waste edge guide trough 3 without swaying or clogging. Due to the moderate air curtain pressure, no shaking or scratches caused by airflow impact appear on the surface of waste edge 5, and the tin plating layer remains intact. The transition from the outlet of waste edge guide trough 3 to the large guide trough 7 and the negative pressure-free automatic edge rolling machine 8 is smooth and without obstruction. Compared with the original ordinary guide trough, the clogging rate is reduced by approximately 90%. Furthermore, the device itself has no moving parts, requires no daily maintenance, and has operated continuously for one month without any malfunctions after the modification.

[0045] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any changes or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in the present invention should be included within the scope of protection of the present invention.

Claims

1. An airflow stabilization and anti-clogging device for high-speed shearing, characterized in that: The waste edge guide trough (3) is streamlined. A chute top plate (11) is provided on the upper part of the waste edge guide trough (3). Multiple sets of guide hole groups (13) are provided on the chute top plate (11). The guide hole groups (13) are connected to a graded pressure pneumatic control module. The guide hole groups (13) are evenly arranged along the length direction of the waste edge guide trough (3). Their outlet direction is downward and inclined towards the discharge direction. The angle between the outlet direction of the guide hole groups (13) and the running direction of the strip (6) is 25° to 35°. The graded pressure pneumatic control module outputs adjustable air pressure to form a constraint air curtain (14). The constraint air curtain (14) suspends the waste edge (5) and constrains it in the middle of the waste edge guide trough (3). The outlet of the waste edge guide trough (3) is connected to a large guide trough (7). The large guide trough (7) is connected to the inlet of a negative pressure automatic edge rolling machine (8).

2. The airflow stabilization and anti-clogging device for high-speed shearing according to claim 1, characterized in that: The graded pressure pneumatic control module includes an air source (21), an air source processing unit (22), a proportional pressure reducing valve (23), multiple solenoid valves (24) and a throttle valve (25) connected in sequence. The throttle valve (25) is connected to an operating side guide hole group (26) and a transmission side guide hole group (27).

3. The airflow stabilization and anti-blocking device for high-speed shearing according to claim 1, characterized in that: The output air pressure range of the graded pressure pneumatic control module is 0.2 to 0.6 MPa. When the linear speed of the strip (6) is 400 to 600 m / min, the low pressure of 0.2 to 0.3 MPa is used; when the linear speed of the strip (6) is 600 to 1000 m / min, the high pressure of 0.3 to 0.6 MPa is used.

4. The airflow stabilization and anti-blocking device for high-speed shearing according to claim 1, characterized in that: The waste edge guide groove (3) is a flared streamlined structure with smooth rounded corners on the inner wall. The polished rounded corners R≥30mm, without sharp corners or steps, and the guide hole group (13) is arranged in 1 to 5 groups along the waste edge guide groove (3) to cover the full width operating range of the waste edge (5).

5. The airflow stabilization and anti-blocking device for high-speed shearing according to claim 1, characterized in that: A steel plate (12) is welded onto the top plate (11) of the guide channel. The welding is full-weld sealed. A guide hole group (13) is machined on the steel plate (12) and the top plate (11) of the guide channel. The guide hole group (13) includes oblique small holes (15) and longitudinal large holes (16). The oblique small holes (15) are evenly opened along the width direction of the waste side guide channel (3). The oblique small holes (15) face the outlet of the waste side guide channel (3) obliquely downward. The longitudinal large holes (16) are arranged perpendicular to the oblique small holes (15) and are connected to all the oblique small holes (15). The oblique small holes (15) are connected in series to form an integrated air circuit. A threaded hole is machined at one end of the longitudinal large hole (16). The pneumatic connector of the graded pressure pneumatic control module is sealed to the longitudinal large hole (16) through the thread. A plug weld (17) is provided on the outer port of the oblique small hole (15).

6. A method for preventing airflow stabilization and blockage during high-speed shearing, using the airflow stabilization and blockage prevention device for high-speed shearing as described in claim 7, characterized in that, Includes the following steps: Step 1: Install the airflow edge stabilizing and anti-clogging device for high-speed shearing behind the upper cutter head (1) and the lower cutter head (2) of the disc shearing and in front of the deburring roller (4), and guide the sheared waste edge (5) into the streamlined waste edge guide groove (3). Step 2: Compressed air is supplied to multiple sets of inclined guide holes (13) arranged on the top plate (11) of the chute of the waste side guide chute (3) through the graded pressure pneumatic control module; Step 3: The airflow is directed downward from the guide hole group (13) and sprayed out at an angle of 25° to 35° with the running direction of the strip (6), forming a constraint air curtain (14) inside the waste edge guide channel (3). The constraint air curtain (14) suspends the waste edge (5) in non-contact and stabilizes it in the middle of the waste edge guide channel (3), thereby suppressing the swaying, flying, entanglement and blockage of the waste edge (5).

7. The airflow stabilization and anti-blocking method for high-speed shearing according to claim 6, characterized in that: This method is applicable to strips (6) with a thickness range of 0.15 to 0.55 mm and is suitable for production line speeds of 400 to 1000 m / min.

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