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A method and device for controlling the stability of strip head
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A technology for controlling strip and stability, which is applied in the field of hot rolling, and can solve the problems affecting the operation efficiency and yield, the inability to guarantee the stability of the strip head, and the deviation of the strip head.
Active Publication Date: 2021-04-27
BEIJING SHOUGANG CO LTD
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[0004] In view of the problems existing in the prior art, the embodiment of the present invention provides a method and device for controlling the stability of the strip head, which is used to solve the problem that the stability of the strip head cannot be guaranteed in the prior art when threading the strip. A technical problem that leads to the deviation of the strip head, which affects the operation efficiency and yield
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Embodiment 1
[0065] This embodiment provides a method for controlling the stability of the strip head, which is applied in the finishing stand, and the finishing stand includes: a first stand, a second stand, a third stand, a fourth stand, The fifth rack, the sixth rack and the seventh rack; loopers are arranged between each rack, such as figure 1 As shown, the methods include:
[0066] S110, before rolling the strip steel, controlling the torque multiple of the looper between the racks to increase to a corresponding preset value, and controlling the angle of the looper between the rear racks to be 20-24°;
[0067] In order to ensure sufficient tension between the racks and the speed at the time of unwinding, and prevent the strip from running off, before rolling the strip, control the multiples of the unloading torque of the looper between the racks to increase to the corresponding preset value .
[0068] As an optional embodiment, controlling the torque multiplier of the looper between...
Embodiment 2
[0114] The application provides a device for controlling the stability of the strip head, such as figure 2 As shown, the device includes: a first control unit 21, a second control unit 22, a third control unit 23 and a fourth control unit 24; wherein,
[0115] In order to ensure sufficient tension between the racks and the speed at the time of unwinding, and to prevent the deviation of the strip, before the strip is rolled, the first control unit 21 is used to control the multiple of the unwinding torque of the looper between the racks increase to the corresponding preset value.
[0116] As an optional embodiment, the first control unit 21 controls the multiplier of the loosening torque of the looper between the racks to increase to a corresponding preset value, including:
[0117] Control the looper torque multiple between the first frame and the second frame to increase by 1.5 on the basis of the initial value; control the looper between the second frame and the third fram...
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Abstract
The invention provides a method and device for controlling the stability of the head of the strip steel. The method includes: before rolling the strip steel, controlling the multiplier of the starting torque of the looper between the racks to increase to a corresponding preset value, and controlling The angle of each looper between the rear racks is 20-24°; when the strip steel bites into the current rack, the speed difference value of the current rack is determined according to the dynamic speed drop value and the tension value of the current rack; During the process, the actual angle of the current looper is obtained, and when the difference between the actual angle and the set angle is 3° to 6°, the speed of the upstream frame corresponding to the current looper is adjusted; when When the strip appears wave-like in the current frame, the roll gap leveling speed of the current frame is controlled to increase, and the current roll gap leveling speed is adjusted according to the increased roll gap leveling speed of the current frame The roll gap leveling value of the frame is adjusted; the looper gain of each looper between the control frames at the rear is reduced to a preset value.
Description
technical field [0001] The invention belongs to the technical field of hot rolling, and in particular relates to a method and a device for controlling the stability of a steel strip head. Background technique [0002] In the field of hot rolling technology, thin-gauge steel strips are thinner and are extremely sensitive to rolling force and load distribution. The current rolling method is difficult to ensure the stability of the strip head, which leads to deviation of the thin-gauge strip head And the odds of scrap are ever increasing. [0003] High-strength and thin-gauge strip head threading frequently occurs due to severe deviation, which leads to folding and crushing of the strip head, which affects the surface quality of the subsequent rolled strip. It not only causes product degradation, but also increases roll consumption. In serious cases, steel scrap accidents will occur, which will affect the operation rate and yield rate. Contents of the invention [0004] In ...
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Application Information
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