Hitachi, Ltd.

Hitachi Automotive Systems, Ltd.

Hitachi Astemo Ltd.

Daikin Industries, Ltd.

Xudong Zhang

Nobuaki Kobayashi

Takahiro Saito

Shinya Okamoto

Akihiro Yamazaki

Akihide Tanaka

Isamu Takahashi

Naoya Okizaki

Ryou Ishibashi

Hiroshi Yoshikawa

Kinya Aota

Yujiro Kaneko

Yusuke Takagi

Masanori Miyagi

Yoshiyuki Takamori

Eiji Ashida

Hideki Kita

Seiji Yamashita

Yasunori Hama

Shoh Tarasawa

Masaya Okada

Yusuke Anma

Shinya Kaneko

A welding work measurement system enables accurate measurement of a positional relation between respective parts. Therefore, a welding work measurement system includes a photodetection unit that detects light generated by a plurality of markers attached to a torch for welding a welding object or light reflected by the plurality of markers, a marker position acquisition unit that acquires marker position data that is three-dimensional coordinate data on the markers on the basis of the light detected by the photodetection unit, and a torch position acquisition unit that acquires torch position data that is three-dimensional coordinate data on the torch on the basis of the marker position data.

Welding work measurement system

A power conversion device including: a semiconductor device; a first water channel and a second water channel stacked in a predetermined stacking direction and installed with the semiconductor device interposed therebetween; and a connecting water channel connecting the first water channel and the second water channel, in which the connecting water channel is formed by joining and fixing a joint member joined to the first water channel and the second water channel and a cover member separate from the joint member to each other, the first water channel and the second water channel are joined to the joint member by a joint formed in a plane parallel to the stacking direction, and the cover member covers the joint and is joined and fixed to the joint member.

Power conversion device and method for manufacturing power conversion device

A burner work measurement system configured to measure work using a burner is provided. The burner work measurement system includes one or more cameras configured to capture the work and a control unit configured to perform computing processing on images captured by the cameras, the control unit is configured to create work data obtained by calculating, based on the images captured by the cameras, at least one of a positional relation between a work object and the burner or flame, a positional relation between the work object and a brazing filler metal, and a positional relation between the burner or the flame and the brazing filler metal.

Work measurement system, education system, and quality control system

There is provided a hollow composite magnetic member obtained by partially reforming a hollow member which is formed of a ferromagnetic material containing Cr of 15 mass % or more and 18 mass % or less, in which the reformed portion includes an alloy containing Cr of 8 mass % or more and 18 mass % and Ni of 6.5 mass % or more and 50 mass % or less. Accordingly, a hollow composite magnetic member having a small width of the nonmagnetic portion and a fuel injection valve having the same can be provided.

Hollow composite magnetic member, process for producing same, and fuel ejection valve

A solenoid pipe is formed of a ferromagnetic material containing 15-18 mass % of Cr, an electromagnetic coil, and a valve body. The pipe includes a reform portion, having a composition in which a component of the ferromagnetic material is mixed with a component of a Ni-containing material. A ratio, e/d, of a maximum deformation, e, of an outer circumferential surface side of the reform portion of the pipe with respect to a thickness, d, of the pipe near the reform portion is 0.5 or less, and a ratio, c/d, of a maximum deformation, c, of an inner circumferential surface side of the reform portion of the pipe with respect to the thickness, d, of the pipe is 0.5 or less.

Solenoid valve and method for manufacturing the same

A nuclear reactor fuel rod is a fuel rod for a light-water reactor. The nuclear reactor fuel rod includes a fuel cladding tube and an end plug, both of which are formed of a silicon carbide material. A bonding portion between the fuel cladding tube and the end plug is formed by brazing with a predetermined metal bonding material interposed, and/or by diffusion bonding. The predetermined metal bonding material has a solidus temperature of 1200&#xb0; C. or higher. An outer surface of the bonding portion, and a portion of an outer surface of the fuel cladding tube and the end plug, which is adjacent to the outer surface of the bonding portion are covered by bonding-portion coating formed of a predetermined coating metal. The predetermined metal bonding material and the predetermined coating metal have an average linear expansion coefficient which is less than 10 ppm/K.

Nuclear reactor fuel rod and fuel assembly having bundled same

There is provided a manufacturing method of a hollow composite magnetic member having weakened magnetism in a portion of a ferromagnetic hollow member, the method includes: a step of forming a weak-magnetic area having weakened magnetism by melting and mixing a Ni-containing material and the hollow member by continuously supplying the Ni-containing material to a portion of the hollow member and heating the irradiation area having a line segment shape with the laser beam. Accordingly, since it is possible to prevent drop of a local portion of a hollow ferromagnetic pipe from being easily generated by a weak-magnetization treatment, to greatly reduce deformation generated by laser irradiation, and it becomes unnecessary to adjust the shielding gas pressure inside the pipe, the weak-magnetization treatment can be performed with higher efficiency and higher quality.

Method and apparatus for manufacturing hollow composite magnetic member, and fuel injection valve

A fuel rod and a fuel assembly for light water reactors, in which crack penetration to a fuel cladding tube or an end plug can be prevented, are provided. The fuel rodincludes: a cylindrical cladding tubeformed of a ceramic base material; a connectionformed of the same material as the cladding tube; and an end plughaving a concave portionof a continuously curved surface shape adapted to house the connection. The end plugis formed of the same material as the cladding tube. A slanted surfaceformed at an end portion of the cladding tube, and a slanted surfaceformed at an end portion of the end plugare joined in contact with each other with a metallic joint material. The joint is supported by the connection

Light water reactor fuel rod having ceramic cladding tube and ceramic end plug

The present invention provides a method of manufacturing a core shroud for a nuclear plant and a nuclear power plant structure in which a groove portion is easily assembled in the case of manufacturing the core shroud having a weld structure of a nuclear power plant by a laser welding, and it is possible to obtain a weld joint portion in which a plastic distortion region and a residual stress are as small as possible, going with a solidification shrinkage of the weld portion. At a time of welding butted portions of a plurality of members constructing a core shroud, a root face is provided in the butted portion, a length of the root face is set to 25% to 95% of a thickness of the thinner one of the butted portions of a plurality of members, a narrow groove is provided in the other than the root face, and the butted portions are welded by a laser welding using a weld wire.

Method of manufacturing core shroud for nuclear power plant and structure of nuclear power plant

Growing community of inventors

Tokyo, Japan

Xudong Zhang