Method of rolling a hollow block on a plug mill, plug mill, use of a plug mill and plug line

摘要

A plug mill may, if it performs both a gouging and a backstitch, act on a hollow block during at least one of the two stitches of at least three sides on the hollow block. For this purpose, in particular 3- or 4-roll stands can be provided. In addition, a sleeve can be provided displaceably on the stopper rod of the stopper rolling mill, whereby the quality of the rolling result can be further improved. This is also possible in addition to the fact that the rollers are employed during rolling, which can be implemented for example by appropriately engageable under load rollers.