リング圧延材の製造方法

Japanese Patent JP7121929

B2

Provided is a ring-rolled member manufacturing method enabling stabilization of the attitude of the ring material without generating a defect and the like in the resulting ring-rolled member even when the main roll of the ring-rolling device is provided with the flange portions positioned on upper and lower sides of the ring material. A ring-rolling device used in the ring-rolled member manufacturing method of the present invention is provided with a main roll 10 and a mandrel roll 20. An outer peripheral face of the main roll includes a recessed portion 12 to accommodate the ring material and an outer peripheral face of the mandrel roll 20, an upper flange portion 11 positioned on an upper side thereof, and a lower flange portion 13 positioned on a lower side thereof. An inner face of the recessed portion includes a rolling face 12S to be in contact with an outer peripheral face of the ring material, an upper face on the upper flange portion side, and a lower face 13S on the lower flange portion side, the lower face 13 S having a slope in such a way that an opening of the recessed portion 12 is enlarged. The slope starts from within a range of a distance corresponding to a thickness of the ring-rolled member from a line of intersection between the lower face 13 S and the rolling face 12S. An angle of the slope is greater than 0.3° and no greater than 9° with reference to the perpendicular plane.

JPS5856001	[Title of the device] Endless belt rolling processing machine
JP3964784	Metal ring loading / unloading device

Kazuya Musha
Atsushi Ozone
Yuji Ishiwari
Momoko Ohji

JP2019234875A

August 19, 2022

December 25, 2019

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Hitachi Metals Co., Ltd.

B21B5/00; B21H1/06

JP2014188580A
JP2013169563A

Okuyama Shoichi
Tetsuo Matsushima
Nakamura Ayako
Soji Morimoto
Yu Tanaka
Koichi Tokumoto
Kohei Arihara

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