A method for preventing the overflow of disc shear wire

Abstract

The present invention belongs to the field of metallurgy technology, and specifically relates to a method for preventing overflow of disc shear wire by inching. After the strip is unloaded and the loop is checked, the strip is slowly inched forward. The distance sensor and tension meter under the inspection platform are used to control the inching accuracy, so that the strip gradually moves toward the coiler until the inspection platform distance sensor detects that the strip has left the platform and the tension meter detects that the tension is close to the set tension, then stops. The system inching logic is then automatically executed. At this time, the strip only needs to move 2-5mm toward the inspection loop to complete the inching process. At this time, the edge wire in the disc shear wire chute has not fallen out, and the machine can be started directly for production. There is no need to change the original inching logic, only to add a distance sensor and part of the program. The distance sensor and tension meter are used for two-way control to ensure the inching accuracy. This solves the problem of edge wire overflow at the disc shear after unloading, inspection and re-building of the trimming product on the production line, and the problem of strip tearing and breaking due to excessive inching speed.

Description

Technical Field

[0001] The invention belongs to the technical field of metallurgy, and in particular relates to a point-motion tensioning method for preventing overflow of disc shearing wire. Background Art

[0002] Strip shape control is a key issue for cold rolling, annealing, and coating lines. Quality inspectors typically measure the actual strip shape by regularly unloading or sampling, and provide feedback to the leveling station as a basis for shape adjustment.

[0003] The exit quality inspection platform of continuous annealing and galvanizing line is often set after the inspection of looper and disc shear (such as Figure 1 As shown in the figure, the traditional tensioning logic is that the strip moves slowly in the direction of the loop until the target tension is established. During the process of unloading and checking the plate shape at the outlet and then re-stretching, the strip moves in the direction of the loop. At this time, the strip at the disc shear also moves in the direction of the loop, and the edge wire will come out of the disc shear chute for more than 500mm (as shown in the figure). Figure 3 If left untreated, the edge wire will fly out when the machine is restarted, causing burrs and tearing at the shears. In severe cases, it can even cause the belt to break. If the edge wire needs to be manually cut, it will affect the production line's rhythm and cause defects on the product edges.

[0004] The invention patent with authorization announcement number CN 111085549B provides a method for automatic segmented unloading and online plate shape inspection. That is, after the exit section of the production line stops, the "unloading and online plate shape inspection" function is selected through the operation interface or the operation panel button to "activate", the pinch rollers of the front and rear steering rollers of the horizontal inspection table are pressed down, and the electronic control system unloads the strip in segments. However, no subsequent ideas for setting up the strip and starting the machine are provided. The use of traditional setting-up methods will inevitably cause the strip to retreat and the edge wires to fly out. Summary of the Invention

[0005] The purpose of the present invention is to provide a method for preventing the overflow of disc shear wire, so as to solve the problem of overflow of disc shear wire and tearing of strip steel due to excessive inching speed after the trimmed products are unloaded, inspected and re-stacked on the production line.

[0006] The technical solution adopted by the present invention to solve the technical problem is: a method for preventing the overflow of the disc shear wire by inching, comprising the following steps:

[0007] 1) After the strip is unloaded and the strip shape is checked at the exit line, the distance between the strip and the distance sensor is D1. The operator selects "Jog to Build" through the operation interface or the button on the operation panel. The system controls the strip to jog toward the coiler at a speed of 30m / min after the loop is checked.

[0008] 2) When the distance sensor of the horizontal inspection platform detects that the distance D2 between it and the strip is greater than 100mm, the jogging speed is automatically reduced to 5m / min and the platform moves forward slowly;

[0009] 3) When the tension detected by the tension meter reaches 40% of the set tension, the inching program stops. At this time, the distance between the strip and the distance sensor is D3;

[0010] 4) Due to the inertia of the inching motion, the strip continues to move forward 1-2 mm, and the tension reaches 70%-80% of the set value. At this time, the distance between the strip and the distance sensor is D4;

[0011] 5) The system automatically executes the tension building program, the strip moves toward the loop direction, the tension meter detects that the strip reaches the set tension, and the automatic inching tension building program ends.

[0012] The present invention has the following beneficial effects: (1) It is simple to implement; it does not require changes to the existing strip-building logic; only a distance sensor and some programs are added. This solves the problem of strip tearing caused by overflow of edge wire at the disc shear after unloading, inspection, and re-building of trimmed products on the production line. (2) The use of a distance sensor and a tension meter for bidirectional control ensures the accuracy of the inching strip-building process and prevents strip breakage caused by excessive inching speed. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 This is the layout diagram of the outlet section of the continuous annealing and galvanizing line of the present invention.

[0014] Figure 2 This is a schematic diagram of the disc shear wire coming out.

[0015] Figure 3 It is a schematic diagram of the inching construction process of the inspection platform of the present invention.

[0016] In the figure, 1. Inspection loop, 2. Disc shear, 3. Tension roller, 4. Inspection platform, 5. Distance sensor, 6. Tension meter, 7. Coiler, 8. Strip, 9. Edge wire, 10. Edge wire chute. DETAILED DESCRIPTION

[0017] The following are specific embodiments of the present invention to further describe the technical solution of the present invention, but the scope of protection of the present invention is not limited to these embodiments. Any changes or equivalent substitutions that do not deviate from the concept of the present invention are included in the scope of protection of the present invention.

[0018] In conjunction with the instructions Figure 1 and 3 The inching method for preventing the disc shear wire from overflowing includes the following steps:

[0019] 1) After the strip is unloaded and the strip shape is checked at the exit line, the distance between the strip and the distance sensor is D1 ( Figure 3As shown in the figure), the operator selects "Jog Establishment" through the operation interface or the operation panel button. After the system controls the inspection of the loop, the strip is jogged toward the coiler at a speed of 30m / min.

[0020] 2) When the distance sensor of the horizontal inspection platform detects the distance D2 between it and the strip steel ( Figure 3 When the distance (shown) is greater than 100mm, the jogging speed will automatically decrease to 5m / min and jog forward slowly;

[0021] 3) When the tension meter detects that the tension reaches 40% of the set tension, the inching program stops. At this time, the distance between the strip and the distance sensor is D3 ( Figure 3 shown);

[0022] 4) Due to the inertia of the inching motion, the strip continues to move forward 1-2 mm, and the tension reaches 70%-80% of the set value. At this time, the distance between the strip and the distance sensor is D4 ( Figure 3 shown);

[0023] 5) The system automatically executes the tension building program, the strip moves toward the loop direction, the tension meter detects that the strip reaches the set tension, and the automatic inching tension building program ends.

[0024] The present invention automatically controls the unloading and inspection loop 1, and slowly moves the strip 8 forward. The distance sensor 5 and the tension meter 6 below the inspection platform 4 control the movement accuracy, so that the strip gradually moves toward the coiler 7 until the distance sensor 5 of the inspection platform 4 detects that the strip 8 is separated from the platform and the tension meter 6 detects that the tension is close to the set tension, and then stops, and then automatically executes the system tension building logic. At this time, the strip only needs to move 2-5mm toward the inspection loop 1 to complete the tension building process. At this time, the edge wire 9 in the edge wire chute 10 of the disc shear 2 has not fallen out, and the machine can be started directly for production.

[0025] The present invention is not limited to the above-mentioned embodiments. Anyone should be aware that any structural changes made under the guidance of the present invention, and any technical solutions that are the same or similar to those of the present invention, fall within the scope of protection of the present invention.

[0026] The technology, shape, and structure not described in detail in the present invention are all well-known technologies.

Claims

1. A method for preventing the overflow of disc shear wire, characterized in that: The following steps are involved: 1) After the strip is unloaded and the strip shape is checked at the exit line, the distance between the strip and the distance sensor is D1. The operator selects "Jog Establishment" through the operation interface or the button on the operation panel. The system controls the strip to jog toward the coiler at a speed of 30m / min after the loop is checked. 2) When the distance sensor of the horizontal inspection platform detects that the distance D2 between it and the strip is greater than 100mm, the jogging speed is automatically reduced to 5m / min and the platform moves forward slowly; 3) When the tension detected by the tension meter reaches 40% of the set tension, the inching program stops. At this time, the distance between the strip and the distance sensor is D3; 4) Due to the inertia of the inching motion, the strip continues to move forward 1-2 mm, and the tension reaches 70%-80% of the set value. At this time, the distance between the strip and the distance sensor is D4; 5) The system automatically executes the tension building program, the strip moves toward the loop direction, the tension meter detects that the strip reaches the set tension, and the automatic inching tension building program ends.

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