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A method for unwinding a looper of a finishing mill and a control device for unloading a looper of a finishing mill
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A finishing mill and looper technology, applied in the direction of tension/pressure control, etc., can solve problems such as strip damage and high tension, and achieve the effect of improving quality and reducing tension impact
Active Publication Date: 2017-01-04
BEIJING SHOUGANG CO LTD
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Problems solved by technology
[0005] The embodiment of the present application provides a method for unwinding the looper of the finishing mill and a control device for the looper unloading of the finishing mill, which solves the problem of only the tension torque corresponding to the current angle of the looper when the looper is unloaded in the prior art. , to calculate the fixed starting torque, there is a technical problem that the tension is too large when the looper is in contact with the strip, resulting in damage to the strip
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Embodiment 1
[0045] This embodiment provides a method for setting up loopers in a finishing mill, please refer to figure 1 , figure 1 It is a flow chart of the method for setting up the looper of the finishing mill in this embodiment, and the method includes:
[0046] Step S101, obtaining the set looper angle of the looper; the set looper angle is the set looper angle that needs to be reached by the looper;
[0047] Step S102, obtaining the current angle of the looper at which the looper is currently located;
[0048] Step S103, calculating the set tension torque corresponding to the set looper angle and the current tension torque corresponding to the current looper angle;
[0049] Step S104, determining that the target tension torque is the sum of a times the set tension torque and b times the current tension torque, wherein, 0
[0050] Step S105, according to the target tension torque, determine the pull-off torque of the looper.
[0051] In the f...
Embodiment 2
[0086] In the second embodiment, a looper unwinding control device for a finishing mill is provided, please refer to Figure 4 , Figure 4 It is a schematic structural view of the device in this embodiment, and the device includes:
[0087] The acquiring module 401 is used to acquire the set looper angle of the looper; the set looper angle is the set looper angle that needs the looper to reach; and acquires the current position of the looper where the looper is currently located. looper angle;
[0088] A calculation module 402, configured to calculate the set tension torque corresponding to the set looper angle and the current tension torque corresponding to the current looper angle;
[0089] A determination module 403, configured to determine the target tension torque as the sum of a times the set tension torque and b times the current tension torque, where 0
[0090]A setting module 404, configured to determine the pull-off torque of t...
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Abstract
The invention discloses a loop pulling method of a finishing mill and a loop pulling and control device of the finishing mill. The method comprises the steps of obtaining a loop setting angle of a loop, wherein the loop angle is the loop angle that the loop needs to reach; obtaining an existing loop angle wherein the loop is located; calculating a tension torque set corresponding to the loop angle and a current tension torque corresponding to the existing loop angle; determining a sum of a set tension torque of which a target tension torque is a times and the current tension torque of which the target tension torque is b times, wherein a is more than 0 and is less than 1, b is more than 0 and is less than 1, and a plus b is equal to 1; and determining the pulling torque of the loop according to the target tension torque. According to the method provided by the invention, the control device is used for solving the technical problems that a strip steep is damaged as the tension is excessive when the loop is in contact with a strip steel due to the fact that the fixed pulling torque is calculated only according to the tension torque corresponding to the existing loop angle when the loop of the finishing mill is pulled in the prior art. Therefore, the technical effect of the quality of a hot rolling product can be realized.
Description
technical field [0001] The invention relates to the technical field of iron and steel smelting, in particular to a looper unrolling method for a finishing mill and a looper unrolling control device for a finishing mill. Background technique [0002] During hot strip rolling, the looper plays an important role in forming and stabilizing the rolling relationship. During the rolling process, although the height control of the looper is not completed by the looper device itself, it is realized by adjusting the speed of the main transmission of the front and rear racks. The looper device itself only provides tension for the strip, but the lifting of the looper roll The control of lifting and touching the strip is done by the looper control itself. At the moment when the looper roll touches the strip, the set speed of the looper cannot be zero, otherwise, when the looper roll touches the strip, if the amount of loop increases for some reason, the looper roll will no longer be abl...
Claims
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Application Information
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