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Title:
ROLLING ROLL AND RING ROLLING METHOD
Document Type and Number:
Japanese Patent JP2015199121
Kind Code:
A
Abstract:
PROBLEM TO BE SOLVED: To provide a rolling roll and a ring rolling method which can suppress local and abnormal heating of a ring-shaped rolling material during ring rolling, and prevent buckling of a stamping/forging material in stamping and forging of the next process.SOLUTION: A pair of rolling rolls is used by being disposed in a ring rolling machine for rolling a ring-shaped rolling material oppositely on the inner peripheral side and the outer peripheral side of the ring-shaped rolling material. The diameter of the pair of rolling rolls increases toward both end sides from the central part in a shaft direction. Preferably, among the pair of rolling rolls, a main roll for rotating the rolling material is formed with a gradient of 9-32° from its central part, and a rotatable mandrel roll which follows the rolling material is formed with a gradient of 15-40° from its central part.

Inventors:
IWASA NAOYUKI
FUKUI TAKESHI
NAGAO SHINYA
FUJITA ETSUO
Application Number:
JP2014200378A
Publication Date:
November 12, 2015
Filing Date:
September 30, 2014
Export Citation:
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Assignee:
HITACHI METALS LTD
International Classes:
B21H1/06; B21H1/00
Domestic Patent References:
JPH0615401A1994-01-25
JP2013169563A2013-09-02
JP2011255410A2011-12-22
Foreign References:
US1971027A1934-08-21