PURPOSE: To stabilize the rotation of an inclined rolling roll by transmitting driving force through a gear from, a rotary housing to a rolling roll.
CONSTITUTION: A rolling device for a metallic long columnar body such as a tube or bar consists of 3 rolling rolls 1 whose rotating shafts are twisted in the same way and arranged obliquely, a rotary housing 2 supporting those rotary roll barrels with a cylyndical inside face, a fixed housing 3 supporting the rotary housing, a roll holding device 5 fixing a roll position and a driving device 4 for driving the rotary housing 2. In the barrel part of the rolling roll, a part 10 to be rolled and a contact part 11 with the inside face of the rotary housing 2 are made up in the shape of a gear and transmission of driving force from the rotary housing 2 to each rolling roll 1 is performed by its gear. Consequently, the number of rotation of each rolling roll does not change before and during rolling and the rolling rolls can rotate stably.
HAMAUZU SHUICHI
Next Patent: POLYESTER FIBER