Hitachi, Ltd.

Mitsubishi Hitachi Power Systems, Ltd.

Hitachi Automotive Systems, Ltd.

Tohoku University

Hitachi-Ge Nuclear Energy, Ltd.

Seunghwan Park

Jun Sato

Yutaka Sato

Satoshi Hirano

Shinya Imano

Kazutaka Okamoto

Yoshiyuki Takamori

Yasuaki Kageyama

Juichi Enyama

Ryosuke Umezu

Jun Watanabe

Haruo Akahoshi

Matahiro Komuro

Yuichi Satsu

Kiyohito Ishida

Yuichi Kobayashi

Akihiro Sato

Toshihiro Omori

Masanori Miyagi

Kenya Ohashi

Yoshihisa Kiyotoki

Akihide Tanaka

Shinji Suzuki

Isamu Takahashi

Xudong Zhang

Hironori Kamoshida

Naoya Okizaki

Ryo Ishibashi

Yasuhisa Omata

Takehiko Yoshida

Katsuhito Takahashi

Hiroyuki Kokawa

Hisamitsu Hatou

Kazutoshi Sugie

Takahiro Tokunaga

Shin Kumagai

Naoki Morihira

Miyuki Kawata

Yusaku Maruno

A master unit includes a welding DB in which prescribed motion data associated with an object to be welded is stored, a state sensor which measures, as welding state data, a situation of welding by a robot which executes welding in a real environment according to the prescribed motion data, a simulated environment which imitates the real environment and notifies a worker of the welding state data, and a motion control unit which receives, as an input, worker motion data indicating a motion of welding by the worker from the simulated environment, operates the robot in the real environment by using the worker motion data instead of the prescribed motion data, and records, as new prescribed motion data, the input worker motion data in the welding DB.

Welding control device, welding robot system, and welding control method

A soft magnetic material that is sheet-shaped or foil-shaped and has a high saturation magnetic flux density, contains iron, carbon, and nitrogen, and includes a martensite containing carbon and nitrogen, and γ-Fe, wherein the γ-Fe includes a nitrogen-containing phase. The soft magnetic material is produced by steps of heating an iron-based material that is sheet-shaped or foil-shaped, carburizing the iron-based material with a carburizing gas, dispersing a granular carbide in α-Fe in the iron-based material at a temperature equal to or lower than a eutectoid temperature, transforming the α-Fe into γ-Fe at a temperature higher than the eutectoid temperature, diffusing nitrogen into the γ-Fe using a nitrogen supply gas to form γ-Fe—N—C, and rapidly heating and then rapidly cooling the γ-Fe—N—C to transform the γ-Fe—N—C into a martensite. The result is a thermally stable soft magnetic material having a saturation magnetic flux density higher than that of pure iron.

Soft magnetic material and method for producing the same, and electric motor containing soft magnetic material

An embodiment of the process state analysis device of the present invention is provided with an evaluation value calculation unit and a graph creation unit. The evaluation value calculation unit calculates, within an evaluation value calculation range indicating a target range for calculating evaluation values, an evaluation value for each cluster that is classified on the basis of multi-dimensional process data output from each measurement device. The graph creation unit determines a hue for a graph element for each cluster on the basis of the evaluation value for the cluster as calculated within the evaluation value calculation range, and on the basis of a color reference evaluation value corresponding to a reference hue for the graph element, and creates and outputs a graph representing, for each aggregation unit time interval in a specified display period, the number of nodes belonging to each cluster.

Process state analysis device and process state display method

In order to realize stable quality control, provided is a quality control device () having an input device which receives data such as an operation condition of each device () to () in a production system () for producing a product; a calculation unit which assigns a value of the operation condition to a correlation formula calculated in advance and calculates a value derived from the correlation formula; and a determination unit which performs good or bad determination on a quality of a workpiece in each process, on the basis of a result calculated by the calculation unit. Further, when 'bad' is determined as a result of the good or bad determination, the quality control device () calculates an appropriate value of the operation condition and sets the value to each device () to ().

Quality control device and quality control method

A rotor coil for a revolving armature includes a strand coil that includes a part arranged in a core slot of the rotor and is composed of a plurality of element wires; and a solid coil welded to an end of the strand coil wherein the end of the strand coil and an end of the solid coil are welded by friction stir welding. A manufacturing method of a rotor coil includes the step of performing friction stir welding wherein the friction stir welding is performed for the butt joint with the end of the strand coil arranged in an advancing side defined by a rotation direction of a tool and with the solid coil arranged in a retreating side.

Friction stir welding of a solder coated strand coil to a solid coil

Rotor coil for armature of rotating machine and production method thereof

A heat resistant alloy member that maintains the creep strength and improves the fatigue characteristics is provided. The heat resistant alloy member according to the present invention includes a recrystallized structure layer including finer grains on the surface of the member than those inside of the member. The recrystallized structure layer is formed by forming a stirred layer by giving processing strain to the surface of the member using a friction stir processing, and applying recrystallization heat treatment to the stirred layer for recrystallization.

Heat resistant alloy member, method for manufacturing the same, and method for repairing the same

A disk brake includes a caliper body having a cylinder portion () with a cylindrical shape. The cylinder portion () has a bore () with a bottom () formed by integrally joining together an opening peripheral edge () at the bottom side of the cylinder portion () and a bottom cover member () to be fitted to the opening peripheral edge () through friction stir welding. The bottom cover member () has a disk shape and is friction-stir-welded along the outer periphery thereof. The terminating point of the friction stir welding is within the boundaries of the bottom cover member ().

Disk brake

The invention provides a valve which suppresses a continuous corrosion of a chemical compound phase such as an eutectic carbide or the like in a valve seat, and improves a corrosion resistance, an impact resistance and an erosion resistance of the valve seat. The invention disperses a chemical compound phase such as the eutectic carbide or the like crystallizing in a dendrite gap as a granular shape or a blocky shape which is equal to or less than about 100 &#x3bc;m, by moving a tool rotating in a crimped state by a load application to a vertical direction to a surface of the valve seat so as to carry out a friction stir processing, and forming a weld metallographic structure of a surface layer portion of the valve seat as a cubic.

Valves having high wear-resistance and high corrosion-resistance

Provided is high corrosion resistant equipment for a plant having the lining structure which exhibits high reliability against breaking of a joining portion over a long use period. The high corrosion resistant equipment for a plant includes a lining plate and a support portion which are made of a high corrosion resistance material and a structural material portion made of a steel material or the like. The lining plate and the support portion include a joining portion to which friction stirring is applied. The support portion is assembled into or fastened to the structural material portion by means of the geometrical structure with a gap interposed between the support portion and the structural material portion. Due to such a constitution, high corrosion resistant equipment for a plant having the lining which exhibits high reliability can be acquired.

High corrosion resistant equipment for a plant

It is an object to provide a friction stir tool excellent in productivity, high temperature strength, and wear resistance at high temperatures. The friction stir tool is formed of a Co-based alloy comprising crystal grains containing a &#x3b3;' precipitate phase dispersed and precipitated therein, and a crystal grain boundary region and a precipitate phase between adjacent crystal grains, in which the precipitate phase is at least one phase selected from a &#x3bc; phase, a Laves phase and a carbide phase.

Friction stir tool

An object of the present invention is to provide a method for producing a composite material that can prevent a powdered additive to be mixed from scattering and control a quantity of the additive dispersed in the composite material. A method for producing a composite material in which an additional material different from a base material is dispersed into a part of the base material comprises the steps of providing a wire rod formed by applying a metallic film to the additional material to be dispersed or by stuffing a metallic tube with the additional material to be dispersed, fixing the wire rod on a surface or into an inside of the base material, and applying stirring along the fixed wire rod with a tool for friction stirring to disperse the additional material into the part of the base material.

Composite material and producing method thereof

Growing community of inventors

Mito, Japan

Seunghwan Park