On-line control method of pinch roll diameter at the entrance of hot rolling mill for finishing rolling
A technology of hot continuous rolling mill and control method, which is applied in the direction of rolling mill control device, metal rolling, metal rolling, etc., can solve the problems that are not involved, can not be measured, etc., to avoid slipping, ensure accuracy, and widely popularize and apply value Effect
Active Publication Date: 2017-06-06
BAOSHAN IRON & STEEL CO LTD
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Problems solved by technology
[0004] The technical solution is mainly composed of a position measuring controller, a pressure controller, a selection function module and a digital-to-analog conversion module to eliminate the position deviation of the pinch roller, and does not involve the correction of the roller diameter deviation after the pinch roller is worn; The feeding roller is installed inside the frame, and the diameter of the roller cannot be directly measured without dismantling the equipment, so an online deviation correction method is needed
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Embodiment 1
[0020] like image 3 As shown, an online control method for the diameter of the pinch roll at the entrance of the hot continuous rolling mill. In this technical solution, the pinch rolls involved are all upper pinch rolls. One pair, and the lower pinch roller is used to transport strip steel. In the actual control process, the lower pinch roller does not participate in the control, but the upper pinch roller participates in the control. Therefore, the The pinch rolls all refer to the upper pinch roll.
[0021] Include the following steps:
[0022] S1: Measure the horizontal distance L between the pinch roll and the first stand of the hot rolling mill when the static idle device is obtained 0 , the horizontal spacing L 0 That is, the theoretical moving distance of the strip head when the strip head advances from the pinch roll to the first stand of the hot rolling mill;
[0023] S2: Using the strip thickness and the intersection angle of the work rolls of the first rack to ...
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The invention relates to the field of hot continuous rolling mills, and specifically relates to a roller diameter control method for a finish rolling entry pinch roller of a hot continuous rolling mill. The roller diameter online control method for the finish rolling entry pinch roller of the hot continuous rolling mill includes following steps: measuring and obtaining the horizontal spacing between the pinch roller and a first rack of the hot continuous rolling mill when the device is still and idle; calculating and obtaining the occluding position deviation value of the pinch roller and the occluding position deviation value of a first rack working roller by employing the thickness of a band steel and the cross angle of the first rack working roller, and correcting the theoretical moving distance by employing the two deviation values, and obtaining the actual forward distance of the head of the band steel; combining the actual forward distance of the head of the band steel with the time difference of occlusion of the pinch roller and the first rack of the hot continuous rolling mill, and calculating the roller diameter of the pinch roller. According to the roller diameter control method, the distance of an occluding point is corrected by employing the included angle of the F1 working roller and the thickness of the band steel, the roller diameter is calculated via the time difference of occlusion of the pinch roller and the F1 rack, precision control of other links for rolling is improved, and the promotion and application values are wide.
Description
technical field [0001] The invention relates to the field of hot continuous rolling mills, in particular to a roll diameter control method for finish rolling entrance pinch rolls. Background technique [0002] In order to ensure the normal bite of the strip steel in the hot tandem rolling mill, a pinch roll is installed in front of the hot tandem rolling mill. Its main function is to assist the normal bite of the strip steel into the rolling mill and detect the running speed of the strip steel. Speed control, the pinch roller is equipped with a pulse generator, and the principle of detecting the running speed of the strip is to pass the pulse of the pulse generator, combined with the change of the roll diameter to obtain the number of pulses for one cycle of operation, and then pass the time of one cycle , to detect the running speed of the strip. In the actual production process on site, due to the dynamic wear of the roll diameter, the detection speed will be abnormal, ...
Claims
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IPC IPC(8): B21B37/00
Inventor 周兴泽荣鸿伟徐欣磊
Owner BAOSHAN IRON & STEEL CO LTD