Toyota Jidosha Kabushiki Kaisha

Jfe Steel Corporation

Taiho Kogyo Co., Ltd.

Honda Motor Co., Ltd.

Mitsubishi Denki Kabushiki Kaisha

Fraunhofer-Gesellschaft Zur Foerderung Der Angewandten Forschung E.V.

Kabushiki Kaisha Yaskawa Denki

Hitachi Cable, Inc.

Fukuda Metal Foil & Powder Co., Ltd.

Toyota School Foundation

Laser X Company, Ltd.

Akio Sato

Yoshinori Ishikawa

Yasuhide Ishiguro

Minoru Kawasaki

Shunsuke Toyoda

Shigeto Sakashita

Kenji Kidera

Kei Sakata

Yuji Hashimoto

Yoshikazu Kawabata

Kazuya Nakata

Hirotaka Kakuta

Kenji Uchida

Hiroyuki Suzuki

Hiroshi Ito

Toshiaki Watanabe

Daisuke Inoue

Koji Suzuki

Hiroshi Kawaguchi

Shinji Kato

Mizuho Sugiyama

Yuji Yokoya

Shuichi Fujikawa

Akihito Hongo

Seiji Kojima

Kazuhisa Mikame

Masatoshi Aratani

Seigo Nishikawa

Tadashi Ichikawa

Soya Takagi

Kazumasa Ohsono

Koji Yamada

Natsuki Sugiyama

Kinya Nakagawa

Kensuke Hidaka

Kazuki Kuba

Bing Yao

Shingo Iwatani

Osamu Sonobe

Toshimitsu Irie

Steffen Nowotny

Kazuo Hasegawa

Noboru Takayanagi

Siegfried Scharek

Ryuichi Morita

Kazuya Saito

Mitsutaka Yoshida

Makio Gunji

Chikatoshi Maeda

Kohei Yanaka

Akihiko Tsuboi

Hironari Mikata

Shozo Nagai

Tetsuro Sawaki

Masaru Setodoi

Kouichi Kaneko

Yasuhisa Shimizu

Takeshi Ikeda

Taku Yamaguchi

Norikazu Kume

Hitoshi Kinoshita

Isaka Kanazawa

Hiromi Nomura

Provided is a thermal-insulated multi-walled pipe for superconducting power transmission that highly prevents intrusion of external heat due to radiation and has excellent thermal insulation property without using a superinsulation. A thermal-insulated multi-walled pipe for superconducting power transmission comprises: a superconducting cable; and a multi-walled pipe that houses the superconducting cable, wherein the multi-walled pipe is composed of a plurality of straight pipes, and at least one of the plurality of straight pipes has, at a surface thereof, a zinc or zinc alloy-plated layer having an average spangle size of 2.0 mm or less.

Thermal-insulated multi-walled pipe for superconducting power transmission

A thermal-insulated multi-walled pipe for superconducting power transmission comprises: a superconducting cable; a multi-walled pipe composed of a plurality of straight pipes and houses the superconducting cable; and a plurality of spacers that are located between adjacent two straight pipes of the plurality of straight pipes, wherein a cross-sectional shape of each spacer is a polygon having three or more vertices, each spacer has a through-hole at a center in the plane, an inner straight pipe is located to pass through the through-hole, a frictional coefficient &#x3bc;between each spacer and the inner straight pipe is 0.1 or less, a frictional coefficient &#x3bc;between each spacer and an outer straight pipe is 0.1 or less, and a ratio L/d of a diagonal equivalent length Lof the polygon to an inner diameter d of the outer straight pipe of the adjacent two straight pipes is 0.9 or less.

Thermal-insulated multi-walled pipe for superconducting power transmission and laying method therefor

Provided is a thermal-insulated multi-walled pipe for superconducting power transmission that highly prevents intrusion of external heat due to radiation and has excellent thermal insulation property without using a superinsulation and can be produced easily. A thermal-insulated multi-walled pipe for superconducting power transmission comprises: a superconducting cable; and a multi-walled pipe that houses the superconducting cable, wherein the multi-walled pipe is composed of a plurality of straight pipes, and at least one of the plurality of straight pipes has, at a surface thereof, a coating layer containing a metal powder.

A laser drilling method is a laser drilling method for performing drilling on a workpiece by use of a laser beam. The laser drilling method includes, after machining a through hole by radiating the laser beam to the workpiece (S), scanning with the laser beam centered around the through hole toward a radial direction while changing a radiation output of the laser beam (S).

Laser drilling method and apparatus with radiation output changes in a radial direction during drilling of a workpiece

A laser cladding apparatus includes a powder supplier to supply metal powder to a portion to be processed, a laser to irradiate the portion to be processed with laser so as to melt the metal powder for cladding, and a controller. The powder supplier includes a gas pressure gauge, and the controller stores, as an initial value, a gas pressure value measured by the gas pressure gauge when the metal powder supplied by the gas pressure reaches the portion to be cladding-processed. In operation after storing the initial value, the controller sets, as a reference time, timing when the gas pressure gauge measures a same pressure as the initial value, and outputs a start signal for laser irradiation to the laser based on the reference time.

Laser cladding apparatus and operating method

In a powder supply method in cladding, an outlet pressure of a coaxial-nozzle side of a supply pipe connecting a feeder to a coaxial nozzle is set within a predetermined range, and powder is supplied from the feeder to the coaxial nozzle.

Powder supply method in cladding

Provided is a powder overlay nozzle that can increase the quality of an overlay layer formed on processing portion of a workpiece, and that can greatly increase workpiece productivity and maintainability. The powder overlay nozzle includes an inner nozzle member including a laser passage for passing laser beam, and an outer nozzle member externally fitted on the inner nozzle member. Between the inner nozzle member and the outer nozzle member, a discharge space for passing powder is formed. The outer nozzle member includes a supply channel for supplying the powder to the discharge space in a direction inclined with respect to an axis L of the powder overlay nozzle.

Powder overlay nozzle

Provided is a powder supply device that can stably supply powder from a main hopper to a powder supply means including a sub-hopper without requiring component replacement and the like. The powder supply device is provided with: a first piping that guides powder accumulated in a main hopper downward; a second piping that is connected to the first piping at a lower end portion thereof while intersecting with the first piping, and that guides the powder guided by the first piping to a sub-hopper; and a switching valve that pressure-feeds the powder temporarily deposited while forming an angle of repose at an intersecting portion of the first piping and the second piping, to the sub-hopper.

Powder supply device

A steel having excellent formability, fatigue endurance after quenching, low temperature toughness, resistance for hydrogen embrittlement, and corrosion fatigue endurance. A method includes heating a steel slab at 1160&#xb0; C. to 1320&#xb0; C., hot-finish-rolling the steel slab at a finisher delivery temperature of 750&#xb0; C. to 980&#xb0; C., and then coiling the hot-rolled steel at a coiling temperature of 560&#xb0; C. to 740&#xb0; C. after slow cooling for a time of 2 seconds or more to produce a hot-rolled steel strip having a structure in which the ferrite grain diameter df corresponding to a circle is 1.1 &#x3bc;m to less than 1.2 &#x3bc;m and the ferrite volume fraction Vf is 30% to 98%, the steel slab containing 0.18 to 0.29% of C, 0.06 to 0.45% of Si, 0.91 to 1.85% of Mn, 0.019% or less of P, 0.0029% or less of S, 0.015 to 0.075% of sol. Al, 0.0049% or less of N, 0.0049% or less of O, 0.0001 to 0.0029% of B, 0.001 to 0.019% of Nb, 0.001 to 0.029% of Ti, 0.001 to 0.195% of Cr, and 0.001 to 0.195% of Mo so that the carbon equivalent Ceq satisfies a value of 0.4 to less than 0.58, and the total x of multiplying factors including that for B according to Grossmann satisfies a value of 1.2 to less than 1.7.

Steel for structural part of automobile and method for producing the same

There is provided a high-strength steel tube having excellent chemical conversion treatability and excellent formability and a method for manufacturing the high-strength steel tube. More specifically, in processing a mother steel sheet containing, on the basis of mass percent, 0.05% or more C, more than 0.7% Si, and 0.8% or more Mn into a pipe shape, the sum total of absolute circumferential surface strains each applied in individual process steps of the processing is 5% or more as nominal strain. A welded steel tube thus manufactured using a steel sheet even containing more than 0.7% Si can have excellent chemical conversion treatability without mechanical grinding or chemical pickling treatment.

High-strength steel tube having excellent chemical conversion treatability and excellent formability and method for manufacturing the same

A method enhances fatigue strength of ear portions which are high fatigue risk parts in a torsion beam almost without bringing about disadvantages in terms of productivity and cost. A torsion beam is formed with a portion of the tubular body into an approximately U-shape in cross section by crushing the portion of the tubular body in the radial direction and, thereafter, due to bending with a bottom line set as a belly side of bending, a bending strain of 2 to 6% in the tube longitudinal direction on a tensile side is imparted to the ear portions.

Torsion beam manufacturing method and torsion beam

A laser processing system and a laser processing method that can highly accurately and efficiently specify a focus position of a processing laser using visible lasers are provided. For that purpose, a laser processing system includes a processing laser oscillator, a condensing optical system including a condenser lens, two visible laser oscillators and, a movement adjusting unit that adjusts the condenser lens and the visible laser oscillators and to move forward and backward in synchronization with each other, an imaging unit that images spot lights of the visible lasers on a workpiece, an image processing unit that subjects an imaged video to image processing and displays an image after the processing, a calculating unit that calculates, in a state in which the respective visible lasers are focused on a focus position of the processing laser, center of gravity positions of spot lights of the respective visible lasers formed on the surface of the workpiece according to the movement of the condenser lens and calculates a distance between centers of gravity, and a control unit that controls the movement adjusting unit such that the distance between centers of gravity is adjusted to zero or substantially zero.

Laser processing system and laser processing method

A laser-clad processing apparatus of the present invention is one which is for carrying out laser-clad processing onto a valve-seat portion of a cylinder head, and is characterized in that it comprises cylinder-head holding means () for holding a cylinder head (H) in an inclining manner so that the central axial line of a valve seat becomes the vertical direction, a laser-processing head () for irradiating a laser beam onto a process part of the valve seat and at the same time discharging a powdery material to this process part, rotary means () which rotates around the central axial line of the valve seat in such a state that the laser-processing head is inclined with respect to the vertical direction, and powdery-material supply means () for supplying the powdery material to the laser-processing head. Moreover, a laser-clad processing method of the present invention is characterized in that it fixes the cylinder head (H), and forms a clad layer while rotating the laser-processing head (), which emits the laser beam with respect to the valve-seat portion of the cylinder head and discharges the powdery material, around the axial center line of the valve seat.

Laser cladding apparatus and method

A robot system includes s a robot () which moves a tool () attached to an end of the robot () by driving a robot drive shaft. The tool () applies a laser beam inputted from a laser oscillator () by drive of the tool drive shaft to an object. A robot control device () controls the robot drive shaft and the tool drive shaft in synchronization.

Laser tool robot system with coordinated drive shaft control

An optical fiber laser, according to the present invention, has an optical fiber including a core to which a rare earth element is added and a clad disposed around the core, and also has an excitation light source for emitting excitation light incident on a side of the optical fiber. The optical fiber has a corrugated shape on the outer circumference of the clad along the longitudinal direction thereof; and the optical fiber is wound in a spiral form and is bundled in such a way that adjacent sides of the clad are brought into contact with one another.

Optical fiber laser and exciting method using same

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Toyota, Japan

Akio Sato