Start-up method after strip breakage of cold-rolled thin-gauge high-reduction-rate high-strength steel

• Main Authors: WANG KAIHUA, TANG GUOZHENG, ZHAN HAIBING, LIU CHANGSHUN, SUN LI, SONG HAOYUAN, PAN YIYONG, LI XUN, JIAO HONGLEI, SUN YONGJUN
• Format: Patent
• Language: Chinese; English
• Published: 23.11.2021
• Subjects: MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVINGMATERIAL; PERFORMING OPERATIONS; PUNCHING METAL; ROLLING OF METAL; TRANSPORTING

The invention discloses a start-up method after strip breakage of cold-rolled thin-gauge high-reduction-rate high-strength steel. The start-up method comprises the following steps of according to an issued secondary rolling strategy, lowering secondary set rolling force of machine frames and adjusting secondary set tension between the machine frames, and closing a thickness control system behind the n machine frame; inching a core shaft at a curling position, and operating a rolling mill to start according to the downward-regulation rolling force and the upward-regulation tension; and at least one time of start-up running, at least one machine frame is manually adjusted according to the strip steel outlet thickness until the strip steel outlet thickness is within a deviation value range of the target thickness, starting the thickness control system, and the thickness control system automatically completing adjustment. The method is favorable for overcoming the unfavorable conditions of rolling mill deviation