Mitsubishi Heavy Industries Limited

Mitsubishi Hitachi Power Systems, Ltd.

Fuji Photo Film Company, Limited

The Kansai Electric Power Co., Inc.

The Tokyo Electric Power Company, Incorporated

Chubu Electric Power Company, Inc.

The Chugoku Electric Power Co., Inc.

Tohoku Electric Power Company, Inc.

Electric Power Development Co., Ltd.

Kyushu Electric Power Co., Inc.

Hokkaido Electric Power Company, Inc.

Shikoku Electric Power Co., Inc.

Hokuriku Electric Power Company

The Japan Atomic Power Company

Tmeic Corporation

Takahiro Ota

Ken Ishii

Hiroshi Ogino

Hiroharu Oyama

Takumi Matsumura

Nobuyuki Hori

Kohei Hatano

Hidetaka Haraguchi

Motonari Machida

Kazuhiko Kamo

Hironori Onitsuka

Makoto Murakoshi

Takashi Ishide

Daisuke Ogura

Akinobu Ando

Yukio Michishita

Shuho Tsubota

Atsushi Sugai

Takashi Akaba

Koji Okimura

Hironori Kawaguchi

Keisuke Kamitani

Hiroshi Kanasaki

Takaharu Maeguchi

Tomoshige Takata

Noriaki Sugimoto

Seiji Asada

Itaru Muroya

Yasuaki Matsumoto

Hideki Madokoro

Kazuhiro Wakabayashi

Yoshiyuki Hemmi

A steam turbine vane manufacturing method including: a groove processing step for forming a protective part joint surface on a steam turbine vane material that has been subjected to rough processing; a build-up welding step for forming, by build-up welding, a protective part build-up bead on the protective part joint surface; and a processing step for performing processing, by cutting the first steam turbine vane material that has been subjected to rough processing and the protective part build-up bead, to finish the first steam turbine vane material has been subjected to rough processing so that the first steam turbine vane material becomes a second steam turbine vane material that has been subjected to finishing processing. The first steam turbine vane material that has been subjected to rough processing is larger than the second steam turbine vane material that has been subjected to finishing processing.

Steam turbine vane manufacturing method

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.

Method for manufacturing turbine rotor blade

A plastically deformable almen strip is held under a predetermined underwater environment in which water jet peening is carried out, and a result of providing compressive residual stress in the water jet peening is confirmed by jetting water jet to the almen strip.

Water jet peening compressive residual stress test method, test device, and test facility

Provided is a molding method for a plate-shaped workpiece including forming a concave portion () at one surface () of a plate-shaped workpiece (), and bending the plate-shaped workpiece () having the concave portion () such that the one surface () becomes a concave surface and a rear surface () thereof becomes a convex surface.

Molding method for plate-shaped workpiece, and molded article

A condition setting process of determining peening conditions for water jet peening on a peening target object, an analysis process of analyzing a jet when a liquid is jetted from a nozzle model to a peening target object model and obtaining a void rate that is a volume rate of air bubbles contained in a unit volume of the liquid and a collapse rate that is a volume of the air bubbles collapsing in a unit time in the unit volume of the liquid in each position on a surface of the peening target object model, a shock pressure correlation value calculation process of obtaining a shock pressure correlation value that is a product of the void rate and the collapse rate in each position, and a range calculation process of obtaining an effective processing range in which the shock pressure correlation value on the surface of the peening target object model is greater than a predetermined value, based on the shock pressure correlation value in each position.

Method of pre-evaluating water jet peening, recording medium having program recorded thereon to execute the method, device for executing the method, and water jet peening method

An object is to provide a method and an apparatus for improving a residual stress in a tubular body, which are enabled to improve the residual stress reliably by clearly defining controlling rage for treatment conditions without depending on an installation state and configuration of the tubular body. When a cylindrical tubular body () is improved in its residual stress by locally irradiating an outer-circumferential surface of a welded portion (C) of the tubular body () with laser beams () and by moving an irradiation area (s) in an circumferential direction, a plurality thermocouples () are installed on the tubular body () to be improved, a temperature history of the outer surface of the tubular body () by the irradiation of the laser beam () is managed by measuring the temperature history itself.

Method for improving residual stress in tubular body

An object is to provide a method and an apparatus for improving a residual stress in a tubular body, which are enabled to improve the residual stress reliably by clearly defining controlling rage for treatment conditions without depending on an installation state and configuration of the tubular body. When an outer-circumferential surface of a welded portion of a cylindrical tubular body () is irradiated with a laser beam that circles around an outer circumference of the tubular body (), a heating width W in a circumferential direction heated by the laser-beam irradiation and a laser-beam moving speed V in the circumferential direction are set so that a stress in the circumferential direction in an inner surface of the tubular body () produced by the heating with the laser beam is at least larger than a yielding stress of a material that the tubular body () is made of.

Method for improving residual stress in tubular body and apparatus for improving residual stress in tubular body

A high frequency scalpel system for use with a video system such as an endoscope using an imaging device essentially consists of a therapeutic electrode functioning as a surgical knife, and a high frequency oscillator for supplying high frequency power to the electrode. In the coagulation operating mode of the scalpel, frequency modulated driving current is applied to an affected part of a living body intermittently only during a horizontal blanking period of a video signal transmitted in the video system. In the blend mode, a mixed mode of the cutting and coagulation modes, the frequency modulated driving current is fed to the scalpel electrode with its larger amplitude falling in a horizontal blanking period and its smaller amplitude in a horizontal scanning period of the video signal. The imaging device and its associated circuitry in the endoscope may be shielded electromagnetically.

High frequency scalpel and endoscope system and method of operating same

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Tokyo, Japan

Takahiro Ota