WIDTH-ALTERING SYSTEM FOR STRIP-SHAPED ROLLED MATERIAL

摘要

A method for altering the width of a strip-shaped rolled material (5), before, during or after hot rolling the rolled material in a hot rolling mill. The problem is to specify a method for altering width so that the length of a rolled out transition piece lying outside width tolerances can be reduced. Scrap losses are to be reduced. The crown of at least one working roll and/or at least one backing roll of a stand (7) is set as a function of a width error e=B−B between a setpoint width Bsetp and the width B of the rolled material (5), wherein the crown is increased when e>0 and the crown is reduced when e<0. AA Rcrown BB Bsetp.

主权项

1. A method for altering the width of a strip-shaped rolled material comprising:
passing the rolled material uncut through a first unit and then through a second unit, wherein rolling of the rolled material is performed in a rolling stand in at least one of the first unit and the second unit, and further comprising method steps of: producing the rolled material with a first width B1, wherein the rolled material emerges from the first unit with a width B=B1, and then transporting the emerging rolled material to the second unit; producing a transition piece of the rolled material, wherein the rolled material emerges from the first unit with the width B, where B1≦B≦B2; producing the rolled material with a second width B2, wherein the rolled material emerges from the first unit with the width B=B2; andsetting a crown of at least one working roll and/or at least one backing roll of the rolling stand as a function of a width error e=Bsetp−B between a setpoint width Bsetp and increasing the width B of the rolled material, wherein the crown is increased if e>0 and wherein the crown is reduced if e<0.