Nippon Steel Corporation

Neturen Co., Ltd.

Mitsuhiro Okamoto

Takashi Ikeda

Hiroshi Nogami

Ryuichi Nishimura

Fumiaki Ikuta

Takahiro Fujimoto

Yuki Ichikawa

Naruo Miyabe

Kazuki Mori

Yoshitaka Kuwahara

Kumpei Sano

Yuiko Shiotani

A brake disk unit includes a rotating member, a brake disk, and a control member. The brake disk includes a disk main body, fins, and convex portions and/or concave portions. The control member includes a support portion and a projecting portion. At least a part of the projecting portion is arranged between fins that are adjacent in the circumferential direction of the brake disk. A gap is formed between the projecting portion and the brake disk. On the surface of the brake disk, the convex portions and/or the concave portions are provided further on the outer side in the radial direction of the brake disk than a minimum opening portion of the gap.

Brake disk unit for railway vehicle

A method for setting conditions for a shaft diameter enlargement, a shaft diameter enlargement method, and a shaft diameter enlargement apparatus are provided. A controller of the shaft diameter enlargement apparatus controls a compressing section, a bending section, and a rotating section to enlarge an intermediate portion of a shaft workpiece to have a predetermined outer diameter by rotating the shaft workpiece about its axis with axial compressive force a bending angle being applied to the intermediate portion. The controller determines whether the shaft workpiece is acceptable, based on the number of rotations of die shaft workpiece required for enlarging the intermediate portion to have the predetermined outer diameter or based on an enlargement ratio of the intermediate portion.

Shaft diameter enlargement condition setting method, shaft diameter enlargement method and shaft diameter enlargement apparatus

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Tokyo, Japan

Mitsuhiro Okamoto