目前,我国薄板、带材供不应求,而且其纵向尺寸公差精度低,横向板型差,因此难以满足电子仪表、轻工、电器等工业部门对高精度带材的要求。东北工学院承担了高精度带材异步恒延伸轧制的课题任务。他们在φ90/φ200×200毫米普通四辊轧机上增加 S 辊恒延伸装 At present, the demand of our country’s sheet and strip is in short supply, and the longitudinal dimension tolerances are low and the transverse sheet shapes are poor, so it is difficult to meet the requirements of high-precision strip materials in such industrial sectors as electronic instruments, light industry and electrical appliances. Northeastern Institute of Technology assumed high-precision strip asynchronously extended rolling task. They are on the φ90 / φ200 × 200 mm ordinary four-roll mill to increase S roll constant extension device