Hitachi, Ltd.

Nippon Steel & Sumitomo Metal Corporation

Kabushiki Kaisha Toshiba

Toyota Jidosha Kabushiki Kaisha

Nec Electronics Corporation

Mitsubishi Electric Corporation

Seikosha Co., Ltd.

Toshiba Energy Systems & Solutions Corporation

Nippon Precision Circuits Inc.

Nippon Steel Corporation

Hideyuki Nakamura

Takeshi Kawasaki

Toshiaki Sagawa

Isao Anai

Yasushi Yamamoto

Shinya Nakayama

Takashi Yamaguchi

Toshiaki Makino

Masaaki Kondo

Takahiro Sato

Takashi Furukawa

Shigeru Harada

Norio Takahashi

Hiroshi Furuta

Hitoshi Asahi

Takashi Yoshida

Masafumi Fujita

Kensuke Nagai

Takaaki Fukushi

Makoto Ishii

Sumio Okuno

Fumio Sato

Shinji Kinoshita

Muneaki Matsushige

Yasuhiro Shinohara

Izuru Yamamoto

Koji Masumoto

Yuki Tamura

Kazuhiro Shono

Yoshiaki Kadoma

Satoru Asai

Toshifumi Takahashi

Seiichi Hayashi

Yoshihiko Ina

Akio Sumita

Kazuma Tsujikawa

Ken Nagakura

Kazuki Sato

Noriaki Arakawa

Hiroyuki Satake

Yuichiro Gunji

Toru Kikuchi

Makoto Takanezawa

Takahisa Yamamoto

Junichi Takagi

Hideki Yoshida

Keinosuke Iguchi

Tooru Ootaka

Sota Kimura

Toshiharu Miyamoto

Takeshi Wakatabe

Hideo Kumakura

Satoru Shimazu

Koji Machida

Kimiyasu Yoshimura

Yosuke Kiyota

Hiromitsu Nagarekawa

Ryosuke Ohirabaru

Mitsuo Iwasaki

Kazuya Segawa

Daijiro Fukuda

Yoshihiro Nomoto

Naoki Hori

Hiroshi Tonegi

Takashi Miyanaga

Mochida Toshihiko

Toshihiko Mochida

Kiyoshi Miyaike

Kento Arai

Yosuke Morita

Tadamasa Kaneyasu

A rail vehicle includes a roof structure, a side structure, a gable end structure, and an underframe. The underframe is configured from a hollow shaped member that includes a first upper side face plate arranged at a central portion in a widthwise direction of the underframe, a first lower side face plate arranged at the central portion, a second upper side face plate arranged at an end portion and positioned below the first upper side face plate, a second lower side face plate arranged at the end portion and positioned below the first lower side face plate, a third upper side face plate that connects the first upper side face plate and the second upper side face plate to each other, and a third lower side face plate that connects the first lower side face plate and the second lower side face plate to each other.

Rail vehicle

A stator core support device according to an embodiment includes plural types of support members that support a stator core on a stator frame disposed radially outward. These support members are combined so as to form a closed circuit portion. Then, an insulating part for electrically insulating part of the closed circuit portion is provided.

Stator core support device and rotating electrical machine

A rotor core is configured by stacking a plurality of core plates each including: an inner peripheral side core portion; an outer peripheral side core portion; a magnet insertion hole; a radial connection portion to be connected to the inner peripheral side core portion; a circumferential connection portion to be connected between the outer peripheral side core portion and the radial connection portion, including a minimum width portion having a width smaller than widths at both ends, and having a width smoothly decreasing from both ends toward the minimum width portion; and a thin portion including a uniform thickness portion which is provided in the circumferential connection portion and which has a uniform thickness and a non-uniform thickness portion which is adjacent to the uniform thickness portion and which has an increasing thickness, the thin portion having the minimum width portion within the uniform thickness portion.

Rotor, rotating electric machine, electric compressor, and refrigeration/air-conditioning apparatus

A steel pipe, consisting of, in terms of mass %: from 0.06% to 0.25% of C, 0.50% or less of Si, 1.00% to 1.80% of Mn, 0.030% or less of P, 0.020% or less of S, 0.08% or less of Al, 0.008% or less of N, 0.080% or less of Nb, and a remainder consisting of Fe and unavoidable impurities, wherein a compressive residual stress at an outer surface measured by an X-ray method is 250 MPa or more, and a compressive residual stress at a position at a depth of 1 mm from the outer surface measured by the X-ray method is 70% or more of the compressive residual stress at the outer surface measured by the X-ray method.

Steel pipe

According to an embodiment, there is provided an apparatus which quantitatively evaluates a braze bonding length. A radiation emission unit emits radiation to each of a plurality of partial specimens which are obtained by cutting a specimen in a plane perpendicular to a braze bonding length direction. A light generator generates light of an amount corresponding to an intensity of transmissive radiation. An imaging unit photographs this light. A calculator calculates a braze bonding length of each of the partial specimens, from a light amount obtained with respect to each of the partial specimens, based on a correlation between a braze bonding length and a light amount. The calculator further calculates the braze bonding length of the specimen by totaling the braze bonding lengths of the respective partial specimens.

Apparatus and method for quantitative evaluation of braze bonding length with use of radiation

According to one embodiment, a rotor of a rotating electric machine includes a collector shaft which is fastened to a main shaft of the machine and mounted with paired collector rings on an outer circumferential surface thereof. Longitudinal lead bars extend in electrically insulated state in longitudinal lead grooves provided in an outer circumferential surface of the collector shaft and are connected to ring through studs. Radial lead bars are located at a collector shaft-side end portion of the main shaft and connect at their inner end portions to the bands. And, both ends of conductive longitudinal studs inserted into longitudinal through holes at a main shaft-side end portion of the collector shaft are connected to outer end portions of the radial lead bars and to the longitudinal lead bars.

Rotor of rotating electric machine

A roll former for steel plate () which enables edge corner deformation of steel plate edges () to be avoided, that is, a roll former for steel plate comprised of a top roll () and a bottom roll (), the roll former for steel plate characterized by forming convex curved parts () having a bending direction opposite to a bending direction of the steel plate () in regions of the bottom roll (), which forms the outer side of the steel plate (), which contact the steel plate edges ().

Roll former for steel plate and roll bending method for steel plate using same

An automobile chassis part which is excellent in low cycle fatigue characteristics, characterized by being formed by steel which contains, by mass %, C: 0.02 to 0.10%, Si: 0.05 to 1.0%, Mn: 0.3 to 2.5%, P: 0.03% or less, S: 0.01% or less, Ti: 0.005 to 0.1%, Al: 0.005 to 0.1%, N: 0.0005 to 0.006%, and B: 0.0001 to 0.01 and has a balance of Fe and unavoidable impurities, in which 80% or more of the part structure comprises a bainite structure and in which a portion where a ratio R/t of the thickness 't' and external surface curvature radius R is 5 or less has an X-ray half width of an (211) plane of 5 (deg) or less.

Automobile chassis part excellent in low cycle fatigue characteristics and method of production of same

A method of press-forming a tubular part having a cross section of an irregular shape crushes a steel tube between an upper die and a lower die in order to form a V-shaped cross section. When the curvature radius of a tip of the upper die is defined as R, the curvature radius of a bottom portion of the lower die corresponding to the tip of the upper die is defined as R, and the wall thickness of the steel tube is defined as t; R, R, and t satisfy R+2t=Rand 1.5t&#x2266;R&#x2266;3t.

Press-forming method of tubular part having cross section of irregular shape, and tubular part having cross section of irregular shape formed by the press-forming method

The present invention provides a steel material for automobile chassis parts which has high fatigue characteristics, does not require much cost for heat treatment, and further is superior in shapeability and a method of production of automobile chassis parts using this steel material, that is, one being a steel material to which Nb and Mo have been compositely added and having a difference 50 to 150 points between a Vicker's hardness of the center of plate thickness and a maximum value of Vicker's hardness within 0.5 mm from the surface after bending by a bending R of the plate outer surface of 2 to 5 times the plate thickness. The surface is high in hardness and the center part is low in hardness, so the fatigue characteristics and shapeability are superior. Note that if annealing under conditions giving a tempering parameter &#x3bb; defined by &#x3bb;=T(20+log(t)) of 14000 to 19000 (where T is the absolute temperature, t is the time (h), and the temperature rise is 660&#xb0; C.), it is possible to relieve the internal stress and further improve the fatigue characteristics.

Steel material for automobile chassis parts superior in fatigue characteristics and method of production of automobile chassis parts using the same

The present invention provides a steel material for automobile chassis parts, having high fatigue characteristics, without a heat treatment, and superior shapeability, and a method of production of such automobile chassis parts. The surface of the steel has a high hardness and the center has a low hardness, providing the superior characteristics. With an annealing step of the invention, it is possible to relieve internal stress and further improve fatigue characteristics.

A semiconductor integrated circuit includes a word line extending along a first direction, a first and a second N-well regions, a P-well region disposed between the first and the second N-well regions, a memory cell having a first, second, third, and fourth PMOS transistors, and a first and second NMOS transistors, the first and the second PMOS transistors disposed in the first N-well region along a second direction which is different from the first direction, the first and the second NMOS transistors disposed in the P-well region, and the third and the fourth PMOS transistors disposed in the second N-well region along the second direction.

Semiconductor integrated circuit

The invention provides a railway car with superior riding quality by improving the flexural rigidity of the car body structure while suppressing increase of body structure mass. A reinforcing plateis attached to a roof constructionon the side facing an inner side of the car body at a longitudinal center portion of a railway car body structurecomposed of a roof construction, a side construction, an underframeand an end construction. The range in which the reinforcing plateis adhered in the longitudinal direction of the railway car body structureis between two body bolsters, and the range in which the plateis adhered in the horizontal direction of the roof constructionis approximately half the length of the roof constructionin the horizontal direction. The thickness of the reinforcing plateis increased gradually as the height of the roof constructionin the vertical direction increases. According to this arrangement, the deformation of the roof constructionat the longitudinal center portion of the railway car body structure, which is excessive without the present arrangement, is suppressed, and the flexural rigidity of the railway car body structureis effectively improved. In other words, the bending vibration of the railway car body in the vertical direction can be suppressed, and a superior riding quality is provided.

Car body structure

Upon forming a railway car composed of plural hollow shape members , annealed hollow shape members are used to form the ends of an underframe . The hollow shape members are disposed so that their longitudinal orientation equals the longitudinal direction of the car body. The underframe is formed by disposing plural hollow shape members adjacent one another in the width direction and welding them together by friction stir welding. When the hollow shape members receive impact load, the ends of the members deform into concertinas, thereby absorbing the impact force. At this time, the friction stir welded portions also receive the impact force, but cracks are not created at the friction-stir-weld joints, and the weld joints do not prevent the hollow shape members from deforming into concertinas.

Railway car

To provide such a memory-mounting integrated circuit as well as a memory test method that can reduce costs to incur for a tester, regulate the number of the input-output terminals for testing, and nevertheless can monitor from outside all the contents of defects in principle. The memory-mounting integrated circuit on which at least a BIST circuit and a memory are mounted, in which the above described BIST circuit includes a data storing apparatus to store the data in a normal memory, a comparing apparatus to compare a memory test result signal from the above described memory with data from the above described data storing apparatus to output a first comparing signal, a control apparatus to control to implement outputting outward from the first comparing signal outputted by the above described comparing apparatus, and an output apparatus to output defective data outward by the above described control apparatus.

Memory-mounting integrated circuit and test method thereof

Growing community of inventors

Tokyo, Japan

Hideyuki Nakamura