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:
Mar. 20, 2018
Filed:
Dec. 18, 2013
Mitsubishi Hitachi Power Systems, Ltd., Kanagawa, JP;
Kohei Hatano, Tokyo, JP;
Hiroharu Oyama, Tokyo, JP;
Motonari Machida, Tokyo, JP;
Hidetaka Haraguchi, Tokyo, JP;
Ken Ishii, Tokyo, JP;
Keisuke Kamitani, Tokyo, JP;
Takumi Matsumura, Tokyo, JP;
Takahiro Ota, Tokyo, JP;
MITSUBISHI HITACHI POWER SYSTEMS, LTD., Kanagawa, JP;
Abstract
A method for manufacturing a turbine rotor blade wherein warping, bending and twisting of the entire rotor blade, which is provided with an excess thickness portion after a forging step, can be suppressed. In the forging step in a process for manufacturing a rotor blade (), the forging is hot-forged such that the distance (the excess thickness amount) from the blade surface of the blade section () to the surface of the excess thickness section is substantially uniform along the entire periphery of a cross section of the blade section () and the excess thickness section () perpendicular to the blade length direction, and such that the amount of the excess thickness in the blade length direction, which is the thickness of the excess thickness section (), gradually increases toward the blade tip from a prescribed position.