Mitsubishi Electric Corporation

Oki Electric Industry Co., Ltd.

Yoshikazu Nakano

Akihiro Goto

Takeshi Araki

Nobuyuki Sumi

Hidetaka Katogi

Akihiro Daikoku

Takafumi Fujii

Yoshio Itoh

Kazuki Kubo

Junichi Aizawa

Akiyoshi Sawai

Hiroyuki Teramoto

Kenichiro Hosoda

Shota Hanioka

Ryoichi Miyamoto

Takako Takei

Mitsuo Tsujikado

Kazuhiro Shigyo

Yusuke Yasunaga

A shielding gas nozzle for metal forming includes a wire feed line being a path to feed a wire at an inclination angle &#x3b8;, a first gas ejection hole to jet a shielding gas at an angle equal to or less than the inclination angle &#x3b8;, and a second gas ejection hole to jet the shielding gas in a direction different from that of the first gas ejection hole. The first gas ejection hole jets the shielding gas toward an intersection along a direction in which the absolute value of the angle to the wire feed direction is less than 90 degrees, and the second gas ejection hole jets the shielding gas toward the intersection along a direction in which the absolute value of the angle to the wire feed direction when viewed in the direction perpendicular to the base material surface is greater than 90 degrees.

Shielding gas nozzle for metal forming and laser metal forming apparatus

A metal-joining structure () includes: an iron alloy part (); an aluminum alloy part (); and a joining interface layer () provided between the iron alloy part () and the aluminum alloy part (). The joining interface layer () includes: an iron-silicon solid-solution-phase sublayer () in contact with the iron alloy part (); an aluminum-silicon eutectic-phase sublayer () in contact with the aluminum alloy part (); and a silicon sublayer () provided between the iron-silicon solid-solution-phase sublayer () and the aluminum-silicon eutectic-phase sublayer ().

Metal-joining structure and method for manufacturing metal-joining structure

A method for manufacturing a discharge surface treatment electrode includes: a first laying of laying powder particles to form a first powder layer; and a first binding of binding some of the powder particles in the first powder layer to each other. The method further includes: a second laying of further laying the powder particles on the first powder layer in which some of the powder particles are bound to each other to form a second powder layer; and a second binding of binding some of the powder particles in the second powder layer to each other to form a stacked body of granulated particles. A region having a different porosity from another region is formed inside the stacked body.

Method for manufacturing discharge surface treatment electrode and method for manufacturing film body

Provided are: a synchronous machine having permanent magnets as a field system; a stress estimator that estimates stress acting on the permanent magnets; and a first magnet temperature corrector that calculates an amount of demagnetization due to stress of armature interlinkage magnetic flux on the basis of the estimated stress, estimates an amount of demagnetization due to stress of the armature interlinkage magnetic flux on the basis of the rotor position of the synchronous machine, a current command and a voltage command, and the amount of demagnetization due to stress of the armature interlinkage magnetic flux; and outputs a permanent magnet temperature estimated value after correction, having factored therein the amount of demagnetization due to stress of the armature interlinkage magnetic flux from the estimated armature interlinkage magnetic flux.

Synchronous machine control device and permanent magnet temperature estimation method for synchronous machine

A method for forming a surface layer, the purpose thereof is to form a high erosion resistant film. The method for forming a surface layer includes: arranging a member () in a machining fluid (); and forming the surface layer including silicon by spacing a silicon electrode () from the member () at a predetermined distance, and by supplying silicon component from the silicon electrode () to the member side by applying a predetermined voltage and generating electric discharge, and an iron-based metal texture including silicon of 3 to 11 wt % is formed at a thickness of 5 to 10 &#x3bc;m at a portion to be treated by repetitively generating a electric discharge pulse in which a time integration value of a current value of the electric discharge pulse is in a range of 30 A&#xb7;&#x3bc;s to 80 A&#xb7;&#x3bc;s.

Erosion resistant machine component, method for forming surface layer of machine component, and method for manufacturing steam turbine

A discharge surface treatment apparatus supplies an electrode material to a surface of a treatment target member by generating pulsating discharges across an inter-electrode gap to form a coating of the electrode material, and includes a switching element that turns application of a voltage from a power source to the inter-electrode gap on/off, a capacitance element that is connected to the switching element in parallel with the inter-electrode gap, an inductance element that is connected in series between both of the switching element and the capacitance element and the inter-electrode gap, and a control unit that includes a function of periodically performing on/off so that an induced electromotive force generated in the inductance element due to a change in the current of discharge generated across the inter-electrode gap can be used as a voltage that induces the next discharge.

Discharge surface treatment apparatus and discharge surface treatment method

An object of the present invention is to provide an electrical discharge surface treatment-purpose electrode that stabilizes properties and a film-forming rate of a coating made by surface treatment that uses the electrode showing a narrow distribution in physical properties such as a composition and resistance. A method of manufacturing an electrical discharge surface treatment-purpose electrode according to the present invention is identified as a method of manufacturing an electrical discharge surface treatment-purpose electrode formed of a green compact made of a metal powder subjected to compression molding, characterized in that the method includes the step of forming a nitride coating by nitriding a surface of the metal powder, and the step of forming a green compact by subjecting the metal powder having its surface nitrided to compression molding.

Method of manufacturing electrical discharge surface treatment-purpose electrode and electrical discharge surface treatment-purpose electrode

A method of manufacturing an electrode for electrical-discharge surface treatment includes kneading a first electrode material composed of at least one of metal powder and insulating powder and a second electrode material composed of conductive organic bonding agent in which a conductive resin is dissolved or dispersed in a solvent, to fabricate a slurry; molding the slurry, to form a compact; and desiccating the compact at a temperature below a thermal decomposition initiating temperature at which a thermal decomposition of the conductive organic bonding agent starts.

Electrode for electrical-discharge surface treatment and method of manufacturing the same

An objective is to provide an electrical-discharge surface-treatment electrode by which a high-coverage zinc coating film can be formed. The electrical-discharge surface-treatment electrode is made by uniformly distributing and compression-molding zinc-based powders including at least one of a pure-metal zinc powder and a metal zinc powder whose surface is oxidized, and zinc-oxide powders whose content rate ranges from 5 to 90 volume percent with respect to the zinc-based powders, to obtain a porosity ranging from 10 to 55 volume percent; then, the zinc coating film is formed using the electrical-discharge surface-treatment electrode.

Electrical-discharge surface-treatment electrode and metal coating film formed using the same

In a method and apparatus for double-talk detection in an echo canceller that uses an adaptive digital filter to estimate, from a received signal and a transmitted signal to which an echo signal of the received signal is added, the characteristics of an echo path and generate a simulated echo signal, and subtracts this echo replica from the transmitted signal in order to transmit a residual signal from which the echo signal has been removed, and which during the course of this operation detects the double-talk state according to a double-talk detection threshold and inhibits the estimation of adaptive digital filter; adaptive estimation and the double-talk detection threshold are controlled in accordance with the state of system e.g., whether it is in the single-talk state, whether the echo signal is active or idle, whether there are fluctuations in the echo path, or whether howling is taking place.

Growing community of inventors

Tokyo, Japan

Yoshikazu Nakano