A Control Method for Improving the Flying Shearing Accuracy of Hot Continuous Rolling and Finishing Strip Steel
A control method and hot continuous rolling technology, which is applied in the field of flying shear, can solve the problems of difficult lifting and no actual length detection, and achieve the effects of improving shearing accuracy, reducing cutting loss rate, and increasing yield
Active Publication Date: 2021-05-14
BAOSHAN IRON & STEEL CO LTD
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Problems solved by technology
However, when the flying shear starts and the blade touches the strip steel, the moving distance of the strip steel is calculated theoretically, without actual length detection, and the flying shear shear control is an open-loop control.
Affected by factors such as the actual speed of the strip, the sensitivity of hot metal detection, and the transmission performance of flying shears, according to research, the cutting loss rate of flying shears in steel mills is currently around 0.4% to 0.6%, and it is difficult to further improve
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[0030] The technical solutions of the present invention will be further described below in conjunction with the accompanying drawings and embodiments.
[0031] The control method of the present invention to improve the flying shear shear accuracy of hot continuous rolling and finishing strip steel is as follows: Figure 1 ~ Figure 3 As shown, it specifically includes the following steps:
[0032] a. The hot metal detector BIZ HMD detects the strip head after it comes out of the roughing mill, and the flying shear shear control system starts to enter the shear control cycle, and the first is the strip head shearing process;
[0033] b. When the laser speed detector ASD1 detects the strip steel, it obtains the real-time speed signal of the strip steel and transmits it to the flying shear control system. The flying shear control system judges the speed data and combines the rolling mill and the roller table The speed comprehensively determines the current strip speed;
[0034] ...
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The invention discloses a control method for improving the precision of flying shear for hot continuous rolling and finishing strip steel. On the basis of the conventional flying shear control scheme, the image recognition system installed before the entrance of the finishing mill is used to timely and accurately capture the actual The cutting length of the strip head is adjusted by using a certain learning algorithm to correct the shearing control of the subsequent strip steel so as to improve the shearing accuracy, thereby reducing the cutting loss rate of the hot-rolled strip steel and improving the yield of the hot-rolled strip steel.
Description
technical field [0001] The invention relates to the flying shear shearing technology, more specifically, to a control method for improving the shearing accuracy of the hot continuous rolling and finishing strip steel flying shear. Background technique [0002] The current flying shear control is an open-loop control system. The main equipment includes a strip head and tail shape detector installed at the rough rolling exit or finish rolling entrance, strip laser speed detector, rough rolling exit strip speed, finish rolling Inlet strip speed, hot metal detector, flying shear transmission pulse generator and other equipment. Use the strip steel head and tail shape detector to determine the head and tail shear amount, and determine the time to start the flying shear transmission and control the transmission speed according to the strip steel position tracking, so that the position where the flying shear blade touches the strip steel is exactly the target shear line. When the ...
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IPC IPC(8): B21B15/00B21B37/00
CPCB21B15/0007B21B37/00
Inventor 陈志荣申屠理锋张健民荣鸿伟
Owner BAOSHAN IRON & STEEL CO LTD