ABSTRACT
Schedule-free rolling - To reduce local roll wear near the strip edges in a conventional hot strip mill, the rolling sequence after roll changing must be limited to the same or similar type of steel that is rolled in a certain pattern with respect to the strip width. This sequence usually starts with rolling narrow width coils and then the coil width is rapidly increased until the maximum value is reached. All subsequent coils are then rolled with a gradual decrease of the strip width. This type of rolling campaign uses a fixed "coffin-type" schedule as illustrated in Fig. 23.10a [15].
