发明名称 |
METHOD OF PRODUCING RING-ROLLING BLANK |
摘要 |
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. |
申请公布号 |
EP2977123(A4) |
申请公布日期 |
2016.11.30 |
申请号 |
EP20140769789 |
申请日期 |
2014.03.18 |
申请人 |
HITACHI METALS, LTD. |
发明人 |
YAGAMI, TETSUYA;TERAMAE, TOSHIYA;FUJITA, ETSUO;NAGAO, SHINYA;MUKOUSE, REMI;IWASA, NAOYUKI;FUKUI, TSUYOSHI;AOKI, CHUYA |
分类号 |
B21H1/06;C22C19/05 |
主分类号 |
B21H1/06 |
代理机构 |
|
代理人 |
|
主权项 |
|
地址 |
|