Control method of fixed-width press inlet side guide plate for improving production efficiency

Abstract

The invention discloses a control method for an inlet side guide plate of a fixed-width press, which can improve the production efficiency and comprises the following steps of: determining a waiting position issuing receiving rule of the inlet side guide plate of the fixed-width press and determining a steel feeding condition after a plate blank is centered; according to the action speed of the inlet side guide plate of the fixed-width press, the action range from the plate blank entering side guide plate to the plate blank stopping side guide plate is calculated, and according to the range, the reasonable waiting position of the inlet side guide plate of the fixed-width press is set, so that in the process from the plate blank entering side guide plate to the plate blank stopping side guide plate, the plate blank is stopped. The opening value of the fixed-width press inlet side guide plate is made to be larger than the theoretical width of the plate blank plus the calculated opening position; and after centering of the plate blank is completed, the guide plate on the inlet side of the fixed-width press machine is opened while the plate blank enters the fixed-width press machine, and the device has the functions of controlling the production rhythm of the plate blank and improving the production efficiency.

Description

Technical Field

[0001] The invention relates to the technical field of metallurgical industry, and in particular to a control method for an inlet side guide plate of a fixed-width press for improving production efficiency. Background Art

[0002] The fixed-width press is a device used to fix the width of hot-rolled slabs. The side guide plate at the entrance is mainly used to center the slab after it is extracted from the heating furnace and sent to the fixed-width press entrance. The purpose is to center the slab in the middle of the rolling channel line. The slab needs to stop during this process, but it is restricted by the movement speed of the side guide plate equipment. The process takes a long time, which is not conducive to improving the production efficiency of the hot rolling production line. With the changes in the market, the production efficiency and rolling rhythm of the hot rolling production line have become the concrete manifestation of the manufacturing capacity of the hot rolling production line. The traditional control method of the side guide plate at the entrance of the fixed-width press has become a bottleneck restricting the improvement of the rolling rhythm of various hot rolling production lines. Fixed-width press for 2250 hot rolling rough rolling The waiting position of the side guide plate at the force inlet is set to the maximum opening of 2300mm. After the slab enters the side guide plate, it needs to be closed from the opening setting value of 2300mm to the opening position of the theoretical width of the slab plus 100mm. As the width of the slab changes, the action time of the process is also inconsistent. The narrower the slab width, the longer the action time of the process. When the slab width is less than 1800mm, the process will affect the rolling rhythm. On the other hand, in the prior art, after completing the slab centering action, the side guide plate needs to be opened to the theoretical width of the slab plus 200mm before the fixed-width press can start feeding steel. This process also has a certain impact on the rolling rhythm, and there is room for improvement and optimization.

[0003] Therefore, based on the above technical problems, the present application specifically proposes a control method for the guide plate on the inlet side of a fixed-width press to improve the rolling rhythm of the fixed-width press according to the width of the slab, eliminate the bottleneck of slab rolling, and improve production efficiency. Summary of the invention

[0004] The purpose of the present invention is to overcome the shortcomings of the prior art and provide a control method for the guide plate on the inlet side of a fixed-width press to improve the rolling rhythm of the fixed-width press according to the width of the slab, eliminate the bottleneck of slab rolling, and improve production efficiency.

[0005] In order to achieve the above-mentioned purpose, the present invention provides a control method for the guide plate on the inlet side of a fixed-width press to improve production efficiency, which is characterized by comprising: determining the receiving rules for the waiting position of the guide plate on the inlet side of the fixed-width press and determining the steel feeding conditions after the slab is centering. The theoretical width of the slab issued by the system and the movement speed of the guide plate on the inlet side of the fixed-width press are used to calculate the movement range of the slab entry side guide plate to the slab stop side guide plate. According to the above range, a reasonable waiting position of the guide plate on the inlet side of the fixed-width press is set, so as to achieve that in the process from the slab entry side guide plate to the slab stop, the opening value of the guide plate on the inlet side of the fixed-width press is greater than the theoretical width of the slab plus the calculated opening position; after the centering of the slab is completed, the guide plate on the inlet side of the fixed-width press is opened while the slab enters the fixed-width press.

[0006] Further, the method for determining the receiving rule of the guide plate waiting position at the inlet side of the fixed width press is: When the slab is taken out from the heating furnace, the maximum width of the slab is measured, recorded and stored in a preset system; When the tail of the previous slab leaves the pinch roller signal at the entrance of the fixed width press, the judgment is made; If the signal is triggered, the system calculates the maximum value of the measured slab width plus the additional value constant to obtain the waiting position opening value of the guide plate on the inlet side of the fixed width press; If the signal is not triggered, the opening value of the guide plate on the inlet side of the fixed-width press is set to 2350 mm and the signal is re-evaluated until the signal is triggered; When the waiting position opening value of the guide plate at the entrance of the fixed-width press is obtained, the guide plate at the entrance of the fixed-width press is set according to the waiting position opening value; Further, the method for determining the steel feeding conditions after the slab centering is completed is: When the slab is centered on the inlet side guide of the fixed width press, the side guide begins to open; When the side guide plate begins to open, determining whether the value of the side guide plate opening minus the theoretical maximum width of the slab is 200 mm; When the value of the side guide plate opening minus the theoretical maximum width of the slab is 200 mm, the inlet side guide plate of the fixed width press stops opening, and it is determined that the slab meets the steel feeding conditions; When the value of the side guide plate opening minus the theoretical maximum width of the slab is not 200 mm, the inlet side guide plate of the fixed width press continues to be opened; When the inlet side guide plate of the fixed width press is in the process of opening, it is determined whether the value of the side guide plate opening minus the theoretical maximum width of the slab is greater than or equal to 50 mm; When the value of the side guide plate opening minus the theoretical maximum width of the slab is less than 50 mm, the inlet side guide of the fixed width press continues to open and the previous step is repeated until it is determined that the value of the side guide plate opening minus the theoretical maximum width of the slab is greater than or equal to 50 mm; When the value obtained by subtracting the theoretical maximum width of the slab from the side guide plate opening is greater than or equal to 50 mm, it is determined that the slab meets the steel feeding conditions.

[0007] Furthermore, a position sensor is provided on the pinch rollers at the entrance of the fixed-width press, and the position sensor is used to ensure the orderly input of the slabs.

[0008] The present invention adopts the above-mentioned solution, and its beneficial effects are: By measuring the maximum width of the slab, a reasonable waiting position of the guide plate at the entrance of the fixed-width press is set, so that the opening of the guide plate at the entrance of the fixed-width press is greater than the theoretical width of the slab plus the calculated opening position during the process from the slab entering the side guide plate to the slab stopping, solving the problem of rhythm influence when the action amount is too large; After the slab is centered, the side guide plate at the entrance of the fixed-width press is opened while the slab enters the fixed-width press, thereby solving the problem of the rhythm of starting steel feeding when the side guide plate is opened to a certain position. BRIEF DESCRIPTION OF THE DRAWINGS

[0009] Figure 1 The figure is a schematic diagram of the overall process.

[0010] Figure 2 A schematic diagram of the receiving rule determination for the guide plate waiting position at the entrance side of a fixed-width press.

[0011] Figure 3 This is a schematic diagram for determining steel feeding conditions.

[0012] Figure 4 Schematic diagram of the coordination between the guide plate and the slab on the inlet side of the fixed-width press. DETAILED DESCRIPTION

[0013] In order to facilitate the understanding of the present invention, the present invention is described more fully below with reference to the accompanying drawings. The accompanying drawings provide preferred embodiments of the present invention. However, the present invention can be implemented in many different forms and is not limited to the embodiments described herein. The purpose of providing these embodiments is to make the disclosure of the present invention more thoroughly and comprehensively understood.

[0014] See attached Figure 1As shown, in the present embodiment, a control method for the guide plate on the inlet side of a fixed-width press for improving production efficiency is characterized in that it includes: determining the receiving rules for the waiting position of the guide plate on the inlet side of the fixed-width press and determining the steel feeding conditions after the slab is centering, calculating the movement range of the slab entering the side guide plate to the slab stopping side guide plate according to the movement speed of the guide plate on the inlet side of the fixed-width press through the theoretical width of the slab issued by the system, and setting a reasonable waiting position of the guide plate on the inlet side of the fixed-width press according to the above range, so as to achieve the process from the slab entering the side guide plate to the slab stopping, so that the opening value of the guide plate on the inlet side of the fixed-width press is greater than the theoretical width of the slab plus the calculated opening position; after the slab is centering, the guide plate on the inlet side of the fixed-width press is opened while the slab enters the fixed-width press.

[0015] See attached Figure 2 As shown, further, the method for determining the receiving rule of the guide plate waiting position at the entrance side of the fixed width press is as follows: When the slab is taken out from the heating furnace, the maximum width of the slab is measured and recorded and stored in a preset system; When the tail of the previous slab leaves the pinch roller signal at the entrance of the fixed width press, the judgment is triggered; If the signal is triggered, the system will measure the maximum slab width ( ) plus the additional value constant Calculate and obtain the waiting position opening value of the guide plate on the entrance side of the fixed width press , the specific formula is: Where: ——Opening of the guide plate waiting position on the entrance side of the fixed-width press (mm); ——The maximum width of the loading slab; ——Added value constant (preferably 500mm, which can be set according to production conditions); If the signal is not triggered, the opening value of the guide plate on the inlet side of the fixed-width press is set to 2350mm and the signal is re-evaluated until the signal is triggered; When the waiting position opening value of the guide plate at the entrance of the fixed width press is obtained, the guide plate at the entrance of the fixed width press is set according to the above waiting position opening value; See attached Figure 3 As shown, further, the method for determining the steel feeding conditions after the slab centering is completed is: When the slab is centered on the inlet side guide of the fixed width press, the side guide begins to open; When the side guide plate begins to open, determine whether the value of the side guide plate opening minus the theoretical maximum width of the slab is 200 mm; When the value of the side guide plate opening minus the theoretical maximum width of the slab is 200mm, the entrance side guide plate of the fixed width press stops opening and it is determined that the slab meets the steel feeding conditions; When the value of the side guide plate opening minus the theoretical maximum width of the slab is not 200mm, the inlet side guide plate of the fixed width press is kept open; When the inlet side guide plate of the fixed width press is in the process of opening, determine whether the value of the side guide plate opening minus the theoretical maximum width of the slab is greater than or equal to 50mm; When the value of the side guide plate opening minus the theoretical maximum width of the slab is less than 50 mm, the inlet side guide of the fixed width press continues to open and the previous step is repeated until it is determined that the value of the side guide plate opening minus the theoretical maximum width of the slab is greater than or equal to 50 mm; When the value obtained by subtracting the theoretical maximum width of the slab from the side guide plate opening is greater than or equal to 50 mm, the slab is judged to meet the steel feeding conditions.

[0016] Furthermore, a position sensor is provided on the pinch rollers at the entrance of the fixed-width press. The position sensor is used to ensure the orderly input of the slabs to avoid the next slab colliding with the previous slab when the previous slab has not yet separated from the pinch rollers, causing unnecessary losses, thereby ensuring the safe operation of production and reducing the production cost.

[0017] The above embodiments are only preferred embodiments of the present invention and are not intended to limit the present invention in any form. Any technician familiar with the art who, without departing from the scope of the technical solution of the present invention, uses the above disclosed technical content to make more possible changes and modifications to the technical solution of the present invention, or modifications are all equivalent embodiments of the present invention. Therefore, all equivalent and equivalent changes made according to the ideas of the present invention without departing from the content of the technical solution of the present invention should be covered within the protection scope of the present invention.

Claims

1. A control method for an inlet guide plate of a fixed-width press machine for improving production efficiency, characterized in that: include: The receiving rules for the waiting position of the guide plate on the inlet side of the fixed-width press and the conditions for steel feeding after the slab is centering are determined. The movement range of the slab entry side guide plate to the slab stop side guide plate is calculated according to the movement speed of the guide plate on the inlet side of the fixed-width press through the theoretical width of the slab issued by the system. According to the above range, a reasonable waiting position of the guide plate on the inlet side of the fixed-width press is set, so that the opening value of the guide plate on the inlet side of the fixed-width press is greater than the theoretical width of the slab plus the calculated opening position during the process from the slab entry side guide plate to the slab stop. After the centering of the slab is completed, the guide plate on the inlet side of the fixed-width press is opened while the slab enters the fixed-width press.

2. A control method for an inlet side guide plate of a fixed width press machine for improving production efficiency according to claim 1, characterized in that: The method for determining the receiving rule of the guide plate waiting position at the entrance side of the fixed width press is as follows: When the slab is taken out from the heating furnace, the maximum width of the slab is measured, recorded and stored in a preset system; When the tail of the previous slab leaves the pinch roller signal at the entrance of the fixed width press, the judgment is made; If the signal is triggered, the system calculates the maximum value of the measured slab width plus the additional value constant to obtain the waiting position opening value of the guide plate on the inlet side of the fixed width press; If the signal is not triggered, the opening value of the guide plate on the inlet side of the fixed-width press is set to 2350 mm and the signal is re-evaluated until the signal is triggered; When the waiting position opening value of the guide plate on the entrance side of the fixed-width press is obtained, the guide plate on the entrance side of the fixed-width press is set according to the above-mentioned waiting position opening value.

3. A method for controlling an inlet guide plate of a fixed-width press machine for improving production efficiency according to claim 1, characterized in that: The method for determining the steel feeding conditions after the slab centering is completed is as follows: When the slab is centered on the inlet side guide of the fixed width press, the side guide begins to open; When the side guide plate begins to open, determining whether the value of the side guide plate opening minus the theoretical maximum width of the slab is 200 mm; When the value of the side guide plate opening minus the theoretical maximum width of the slab is 200 mm, the inlet side guide plate of the fixed width press stops opening, and it is determined that the slab meets the steel feeding conditions; When the value of the side guide plate opening minus the theoretical maximum width of the slab is not 200 mm, the inlet side guide plate of the fixed width press continues to be opened; When the inlet side guide plate of the fixed width press is in the process of opening, determining whether the value of the side guide plate opening minus the theoretical maximum width of the slab is greater than or equal to 50 mm; When the value of the side guide plate opening minus the theoretical maximum width of the slab is less than 50 mm, the inlet side guide of the fixed width press continues to open and the previous step is repeated until it is determined that the value of the side guide plate opening minus the theoretical maximum width of the slab is greater than or equal to 50 mm; When the value obtained by subtracting the theoretical maximum width of the slab from the side guide plate opening is greater than or equal to 50 mm, it is determined that the slab meets the steel feeding conditions.

4. A method for controlling the inlet guide plate of a fixed-width press machine for improving production efficiency according to claim 2, characterized in that: A position sensor is also provided on the pinch rollers at the entrance of the fixed-width press, and the position sensor is used to ensure the orderly input of the slabs.

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