Hitachi, Ltd.

Kenichi Koyama

Toshiyuki Kajiwara

Hidetoshi Nishi

Takashi Norikura

Isao Asotani

Tetsuji Taniguchi

A cluster type multi-roll rolling mill with 20 rolls provided in a mono-block housing has 4 backing bearing shafts for supporting rolls on each of two, upper and lower, sides of a travelling path of a rolling material, and is characterized in that the 4 backing bearing shafts on at least one side of said two, upper and lower sides consist of two outside backing bearing shafts and two central backing bearing shafts, the two outside backing bearing shafts each are fixed to the housing through a saddle, the two central backing bearing shafts between the two outside backing bearing shafts are movable in a vertical direction and a drive mechanism is provided for moving vertically the two central backing bearing shafts.

Cluster type multi-roll rolling mill and rolling method

A strip rolling mill of cluster type has, on at least one side of the strip path, a work roll, a plurality of intermediate rolls supporting said work roll and a plurality of backing bearing assemblies supporting said intermediate rolls. Each backing bearing assembly has a row of backing bearing units and shape control means by which the backing bearing units are adjustable relative to the work roll axis so that strip shape control can be applied. All backing bearing assemblies on one side of the strip path have such shape control means. In the mill at least two of the shape control means are independently operable so as to apply respectively different shape control patterns to the work roll.

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Takahagi, Japan

Kenichi Koyama