B - Operations – Transporting – 21 – B
Patent
B - Operations, Transporting
21
B
341/42
B21B 37/22 (2006.01)
Patent
CA 1152189
ABSTRACT A method for automatically controlling the width of a steel slab during hot rough-rolling thereof involves arranging a pair of horizontal broadening rolls each having at least one annular projection in a hot roughing mill train comprising a plurality of roll stands. A roll gap correction of the pair of broadening rolls is calculated on the bases of the variation in the width of the slab during hot rough-rolling on the hot roughing mill at the entry of the pair of broadening rolls. The roll gap of the pair of broadening rolls is controlled in response to the amount of roll gap correction, thereby automatically controlling the width of the slab during hot rough-rolling thereof to a pre- scribed value at a high accuracy in accordance with the finishing width of a steel strip which is to be manufactured from the slab. At the same time, variations in the width of the slab during hot rough-rolling thereof are automatically corrected to a high degree of accuracy.
344785
Ariizumi Takashi
Okado Masaru
Macrae & Co.
Nippon Kokan Kabushiki Kaisha
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