Mitsubishi Electric Corporation

Jfe Steel Corporation

Nec Corporation

Mitsubishi Generator Co., Ltd.

Daisuke Mizuno

Koichiro Kamei

Kazuhiro Odahara

Hiroaki Kitano

Naohito Kaneda

Masami Abe

Yoshihiro Morimoto

Kazunori Ozawa

Nobuyuki Ishikawa

Hiroaki Dei

Naoya Kadota

Masahiko Kurishige

Kazuhiko Fukushima

Kyono Yasuda

Osamu Ishikawa

Kohei Nakamura

Takeru Okabe

Akihiko Imagi

Haruo Nakamichi

Haruhiko Shimoji

Yasuki Hattori

Kota Yano

Yuhei Tsukahara

Takeshi Matsuda

Masahiro Yoshida

Minoru Tanaka

Shiro Yonezawa

Masahiro Iezawa

Akira Matsuzaki

Yusuke Fushiwaki

Satoru Ando

Seiji Nakajima

Kazuhisa Okai

Yutaka Matsui

Koji Fujimoto

Kensuke Kato

Shuhei Ogawa

Shinji Otsuka

Rinta Sato

Daichi Goto

Naho Inoue

Wataru Nagaya

Masataka Omoda

Kazuhiro Nakatsuji

Yusuke Yoshinari

Shigeaki Sugimoto

Yoshihikro Morimoto

Takenobu Matsubara

Kazuyuki Tsumagari

Yoshihiro Sasaki

A method for evaluating a delayed fracture characteristic of a metal material that performs a step including a step (A) and a step (B) below once or a plurality of times to evaluate the delayed fracture characteristic of the metal material having been processed. Step (A): a step that brings an aqueous solution which includes a chloride ion into contact with a surface of the metal material to cause chloride of 1000 to 100000 mg/min chloride amount to deposit to the surface. Step (B): a step in which the metal material to which the chloride has deposited in the step (A) is left stationary in an air atmosphere at a temperature from −50 to 10° C. and at a relative humidity higher than or equal to a deliquescence humidity of the chloride.

Method for evaluating delayed fracture of metal material

An inspection device includes: a base; a linear motion mechanism which performs linear motion; a link mechanism which has a driven link connected to the base, and which extends/contracts by the linear motion performed by the linear motion mechanism; a connection mechanism for connecting between a driving link of the link mechanism and the linear motion mechanism; and a sensor. The connection mechanism has a link connection portion connected to the link mechanism, and a ball nut that moves in conjunction with the linear motion performed by the linear motion mechanism. When a force higher than or equal to a predetermined force is applied to the link mechanism, the link connection portion is separated from the ball nut so as to contract the link mechanism.

Inspection device for rotary electric machine and inspection system for rotary electric machine

A hot-pressed member, a steel sheet for hot pressing, and methods for producing the hot-pressed member and the steel sheet for hot pressing. The hot-pressed member includes a steel sheet and a Zn-based alloy coated layer disposed on at least one surface of the steel sheet. The Zn-based alloy coated layer includes a solid solution phase including Zn with the balance being Fe and incidental impurities, an intermetallic compound phase including Fe with the balance being Zn and incidental impurities, and an oxide layer including Zn. The oxide layer serves as an uppermost layer of the Zn-based alloy coated layer and splits the intermetallic compound phase. The split density in at least one cross-section of the oxide layer per unit cross-section is 10 split positions/mm or more.

Hot-pressed member, steel sheet for hot pressing, and methods for producing the hot-pressed member and the steel sheet for hot pressing

A pulling detection device includes: a base in which, on a foundation portion, a first wall portion, a projection, and a second wall portion are provided; a movable rod including a switch operation body and a pulling rod, the switch operation body having a first wall portion opposed surface, a projection opposed surface, and a second wall portion opposed surface, the pulling rod extending from the second wall portion opposed surface, while movement of the movable rod toward one side is restricted by contact between the first wall portion and the first wall portion opposed surface and movement of the movable rod toward another side is restricted by contact between the projection and the projection opposed surface; an elastic body provided between the second wall portion opposed surface and the second wall portion; a first switch which operates by contact/separation; and a second switch which operates by contact/separation.

Pulling detection device and moving body system comprising same

A surface-treated steel sheet includes a chemical conversion coating with a thickness of 3.0 &#x3bc;m or less, the chemical conversion coating being placed on a surface of a hot-dip Zn&#x2014;Al alloy coated steel sheet including a hot-dip Zn&#x2014;Al alloy coating film containing Al: more than 1.0 mass % and 15 mass % or less, a balance being Zn and inevitable impurities. The chemical conversion coating contains AlHPO.2HO and a compound containing one or more elements selected from Mg, Ca, and Sr such that a sum of contents of AlHPO.2HO and the compound is 3.0 mass % to 50 mass %.

Surface-treated steel sheet

There is provided a planar member having a flat portion that makes contact with the inner circumferential surface of an endless track at a position at a traveling subject side with respect to a virtual straight line that connects a vertex, at the traveling subject side, in the outer circumferential surface of a first pulley and a vertex, at the traveling subject side, in the outer circumferential surface of a second pulley.

Endless-track traveling apparatus and traveling body

A method of predicting a corrosion loss of a metal material, the method including: inputting a prediction request point including a use period of the metal material for which a corrosion loss is desired to be predicted and second environmental parameters indicating a use environment of the metal material in the use period; calculating a similarity degree between first environmental parameters in corrosion loss data and the second environmental parameters in the prediction request point; dimensionally reducing the first environmental parameters in the corrosion loss data to a latent variable taking the similarity degree into consideration; and predicting a corrosion loss of the metal material for the prediction request point based on a prediction expression constructed using the latent variable and the similarity degree.

Method for predicting corrosion loss of metal material, method for selecting metal material, and device for predicting corrosion loss of metal material

In a wedge looseness diagnosis which is performed by striking wedges of a rotary electric machine, a variation of a wave form of a strike sound is reduced with respect to a variation of an amount of looseness of the wedges, and it is difficult that a slight difference of the amount of the looseness of the wedges is discriminated, so that the wedges are struck by a strike portion in a state where the wedges are pressed by a pressure portion which presses the wedges, and a strike sound at a high frequency is reduced, whereby an amount of a variation of magnitude of the strike sound is enlarged with respect to a valuation of the amount of the looseness of the wedges, and the amount of the looseness of the wedges is judged in accordance with the strike sound which is obtained by a strike sound measuring portion.

Wedge looseness inspection device of rotary electric machine

An endless-track traveling apparatus includes a casing, pulleys having axes arranged in parallel in the casing, a motor for driving the pulleys, and an endless track wound on outer circumferential surface portions of the pulleys to rotate together with the pulleys and move on a traveling target. The endless-track traveling apparatus further includes: a plate-shaped member disposed in contact with the endless track and opposed to the traveling target in a space surrounded by the endless track, and fitted in the casing; a magnet fixed in the casing to attract the traveling target; and an elastic member having one end in contact with an inside of the casing and another end in contact with the plate-shaped member, and urging the plate-shaped member in such a direction as to press the plate-shaped member against the endless track.

Endless-track traveling apparatus, and movable body of generator inspection robot including the same

There are proposed a method for measuring hydrogen-induced cracking which can measure hydrogen-induced cracking initiated in an interior of a test specimen during HIC test and a measuring apparatus used in this method. When cracks initiated in an interior of a test specimenimmersed in a test solutioncontaining hydrogen sulfide is measured by an ultrasonic probeplaced in a vessel, the position and size of cracks initiated in the interior of the test specimenare measured with the lapse of time at a state of immersing the test specimenin the test solution by scanning the ultrasonic probeor the test specimen

Method and apparatus for measuring hydrogen-induced cracking

A wedge tapping device for a rotating electrical machine to be inserted through a gap between a rotor and a stator to tap a wedge. The wedge tapping device includes: a tapping portion configured to tap the wedge and having a tapping force measuring portion configured to measure a tapping force of the tapping; an energy supplying portion configured to apply tapping energy to the tapping portion; an absorbing portion configured to suppress energy to be applied to the tapping portion; and a tapping arm, on which the tapping portion is disposed, and which has a longitudinal direction in a direction perpendicular to a direction in which the tapping portion performs tapping. The tapping arm is disposed so that the longitudinal direction is parallel to a rotation axis when the tapping is performed in the gap.

Wedge tapping device for rotating electrical machine, wedge inspection system for rotating electrical machine and wedge tapping method for rotating electrical machine

A steel material for highly deformable line pipes that has superior strain aging resistance, superior HIC resistance, and a metallographic structure including ferrite, bainite, and martensite-austenite constituent. The area fraction of the martensite-austenite constituent is 0.5 to 5.0%, and the difference in hardness between the ferrite and the bainite is 60 or more in terms of Vickers hardness. Additionally, the steel material has a uniform elongation of 9% or more and a yield ratio of 90% or less both before a strain aging treatment at a temperature of 300&#xb0; C. or lower and after the strain aging treatment.

Steel material for highly deformable line pipes having superior strain aging resistance and superior HIC resistance, method for manufacturing same, and welded steel pipe

A steel material for highly deformable line pipes that has superior strain aging resistance, superior HIC resistance, and a metallographic structure composed mainly of ferrite and bainite. The total area fraction of the ferrite and the bainite is 90% or more, and the difference in hardness between the ferrite and the bainite is 70 or more in terms of Vickers hardness. Additionally, the steel material has a uniform elongation of 9% or more and a yield ratio of 90% or less both before a strain aging treatment at a temperature of 300&#xb0; C. or lower and after the strain aging treatment.

Provided is a motor generator, which is always connected to an engine via a belt, and is configured to carry out start control of the engine and power generation control, the motor generator having a two-output power transmission mechanism including: a belt driving mechanism, which is configured to drive the engine through the belt; and a gear driving mechanism, which includes a pinion gear to be coupled to a ring gear on the engine side in accordance with an external instruction, and is configured to drive the engine by the pinion gear being coupled to the ring gear, in which an output of the belt driving mechanism and an output of the gear driving mechanism are arranged at positions opposing each other in an axial direction of a rotor of the motor generator.

Motor generator, engine starting device, and engine start control method

The rotation speed and the crank position of an engine in an engine stopping process are detected; then, in the case where when the detected crank position is at an intermediate point between the top dead center of any one of the cylinders and the top dead center of the cylinder following said one of the cylinders, it is determined that the engine rotation speed is within a predetermined range, drive of the starter is prohibited for a predetermined time period.

Engine starting apparatus

Growing community of inventors

Tokyo, Japan

Daisuke Mizuno