The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Oct. 09, 2018
Filed:
Mar. 18, 2014
Hitachi Metals, Ltd., Tokyo, JP;
Tetsuya Yagami, Yokohama, JP;
Toshiya Teramae, Yokohama, JP;
Etsuo Fujita, Yasugi, JP;
Shinya Nagao, Yasugi, JP;
Remi Mukouse, Yokohama, JP;
Naoyuki Iwasa, Yasugi, JP;
Tsuyoshi Fukui, Yasugi, JP;
Chuya Aoki, Yasugi, JP;
Hitachi Metals, Ltd., Tokyo, JP;
Abstract
The present invention provides a high quality material for ring rolling. The material includes radially outer and inner peripheral surfaces. In the material, a center of gravity on a half section is located so as to be closer to the outer peripheral surface in contact with a main roll than a center of the half section in a thickness direction, a shape of the half section includes a height reducing portion having a height from a center line dividing the half section into halves in a height direction, this height is gradually reduced toward the inner peripheral surface in contact with a mandrel roll, and the shape is formed in a substantially linear symmetry such that the center line is a symmetric axis. A height of the inner peripheral surface is from 20% to 50% of a maximum height of the material.