Roll changing device for rolling mill
AssigneeHitachi, Ltd.
InventorTeruo Sekiya
Life of this patent
Estimating the term…
Abstract
A roll changing device for rolling mills, in which the roll are changed through roll exchange between the work roll changing rails and intermediate roll changing rails which are mounted in a housing, and delivery rails placed in front of the rolling mill. The improvement comprises a vertically movable floor device carrying the delivery rails. The vertically movable floor device is adapted to move vertically to bring the delivery roll into alignment with the work roll changing rails and the intermediate roll changing rails to permit an easy and prompt roll change without any restriction in the space, even when the work rolls and the intermediate rolls are mounted at large depths from the floor level.
Claims8
A roll changing device for rolling mills, comprising:
- a mill stand having a housing, and upper and lower roll sets constituting a pair, each including a work roll, an intermediate roll and a back up roll with said intermediate roll disposed between said work roll and said back up roll;
- work roll changing rails and intermediate roll changing rails spaced vertically from said work roll changing rails, respectively, and adapted for mounting said work rolls and said intermediate rolls during the roll change;
- said roll changing rails being disposed in said housing;
- a stationary floor being provided at the front side of said rolling mill at a fixed distance from said rolling mill and having rails mounted thereon;
- delivery rails disposed between said rolling mill and said stationary floor, and adapted to deliver and receive said rolls to and from said roll changing rails;
- a vertically movable floor device provided between said rolling mill and said stationary floor, said floor device having rails;
- a roll changing truck carrying said delivery rails mounted thereon and movably mounted on said rails of said vertically movable floor device;
- said work and intermediate roll changing rails being common in size with and parallel to said delivery rails, and said rails on said stationary floor being common in size with and parallel to said floor device rails;
- and
- said vertically movable floor device being vertically movable respectively to a first position where said delivery rails on said roll changing truck join and align with said work roll changing rails, to a second position where said delivery rails join and align with said intermediate roll changing rails, and to a third position where said floor device rails join and align with said rails on said stationary floor.
Dependencies are inferred from the claim text.