Tailing discarding method for thin specification switching production mode of continuous casting and rolling production line

• Main Authors: HOU MENGQIANG, LAO RUIJIE, TAN YUE, MENG XIANGQING, FENG QINGZHEN, LYU YANLEI, LI BIN, ZHANG XU, WANG JIANGTAO, LIU CHAO, ZHAO WEN, BI YANLEI, HE XIANGZHONG, YIN XUNMIN, QIAN JUNRAN, LI WENZE, ZHANG LINCHAO, SUN ZHUOYANG
• Format: Patent
• Language: Chinese; English
• Published: 07.11.2023
• Subjects: MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVINGMATERIAL; PERFORMING OPERATIONS; PUNCHING METAL; ROLLING OF METAL; TRANSPORTING

The invention discloses a continuous casting and rolling production line thin specification switching production mode tailing discarding method, which belongs to the technical field of steel production, and comprises the following steps: (1) calculating the real-time thickness h and no-load roll gap h0 of strip steel: (2) calculating the speed of the strip steel: calculating one by one to obtain the speed Vex of the strip steel at the outlet of each rolling mill and the speed Ven of the strip steel at the inlet of each rolling mill; (3) dynamic rack polishing control: under the abnormal condition, manually triggering a pendulum shear to shear, virtually tracking the position of the tail 7-12 m away from the F1 rolling mill, and starting a rack polishing function by the F5 rack; the rolling mill roll gap control is switched from the position control mode to the rolling force control mode, and the rolling force is reduced; and when the actual rolling force is reduced to 1MN, the position control mode is switche