PURPOSE: To prevent the generation of rolling troubles, more particularly overlap flaws effectively in combined rolling of flat rolls and caliber rolls by providing ≥2 kinds of calibers to the caliber rolls and making the same selectable freely.
CONSTITUTION: A caliber roll stand 15 having ≥2 kinds of an calibers 14aW 14c for one product size is provided behind a flat roll stand 6. The calibers 14a, 14b, 14c are used respectively in the cases in which the degree of the bulging shape of an intermediate material 12 to be rolled is standard, small and large. Since the degree of the bulging shape can be predicted according to the material quality of the materials to be rolled, rolling conditions, etc., the adequate calibers are selected by changing the calibers of the stand 15 in the axial direction of the roll. According to this method, the materials can be rolled with the calibers of always the adequate shape even if there are large fluctuations in the degree of axial direction of the materials, whereby the generation of defectives is eliminated and the life of the rolls is prolonged.
TANAKA TERUAKI
NODA AKIO
TAKEDA SATORU
INOUE MASATAKA
| JPS5437582A | 1979-03-20 |