Manufacturing method for material for ring rolling

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United States of America Patent

PATENT NO 9719369
SERIAL NO

14778021

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Abstract

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A manufacturing method provides a high-quality material for ring rolling. The manufacturing method of the material for ring rolling includes a step of heating a disk-shaped material for hot forging to a hot working temperature, a step of arranging the material for hot forging onto a lower die having a convex portion with a truncated conical shape, a step of forming a thin portion by pressing a center portion of the material for hot forging by using an upper die having a convex portion with a truncated conical shape, and a step of manufacturing a material for ring rolling by removing the thin portion wherein a center of gravity on a half section of the material for ring rolling is located so as to be closer to an outer peripheral surface of the half section than a center of the half section in a thickness direction of the half section.

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Patent Owner(s)

  • HITACHI METALS, LTD.

International Classification(s)

Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Aoki, Chuya Yasugi, JP 16 13
Fujita, Etsuo Yasugi, JP 25 240
Fukui, Tsuyoshi Yasugi, JP 24 93
Iwasa, Naoyuki Yasugi, JP 5 1
Mukouse, Remi Yokohama, JP 2 0
Nagao, Shinya Yasugi, JP 6 20
Teramae, Toshiya Yokohama, JP 9 43
Yagami, Tetsuya Yokohama, JP 5 11

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