To provide a rolling mill of which the rolling mill and devices around a driving reduction gear connected to the mill can be made compact and angularity on the inside surface of a pipe after rolling is prevented.
This device consists of plural rolls 1 symmetically arranged around the pass line, a driving bevel gear 4 having a ring shaped large diameter for rotationally driving the rolls 1, an input shaft mechanism 5 for rotating the driving bevel gear 4, plural gear transmission mechanisms 8 arranged at equal intervals in the peripheral direction of the bevel gear 4 and a housing 3 for holding them. The input shaft mechanism 5 consists of one input shaft 6 which penetrates the housing 3 from the outside to the inside, a small diameter input bevel gear 7 which is fixed to the input shaft 6 and engaged with driving bevel gear 4 and the input shaft mechanism 5 is arranged between a pair of gear transmission mechanisms 8, 8 which are adjacent to each other in the peripheral direction. Even when the input shaft 6 is horizontally arranged, the phase angle of the roll is finely variable.
Fujiwara, Hiroshi
Inui, Akira
Toyooka, Takaaki
Itaya, Motoaki
Yorifuji, Akira
Onishi, Toshio
Sugano, Koji
Nishida, Yasuo
Tanaka, Nobuki
KAWASAKI STEEL CORP