The Furukawa Electric Co., Ltd.

Furukawa Automotive Systems Inc.

Nippon Telegraph and Telephone Corporation

Toho Ganryo Kogyo Co., Ltd.

Takashi Shigematsu

Saburo Yagi

Kenji Suzuki

Takeo Shimizu

Jun Yamakawa

Hiroyuki Yamada

Satoshi Saito

Koji Kato

Masaya Satou

Hiroshi Matsuura

Hisaharu Yanagawa

Mikio Ishihara

Mikio Kuwahara

Hiroshi Hayashi

Toshio Kimura

Kenichi Nakamura

Katsuki Suematsu

Shiro Nakamura

Yasushi Kihara

Toshihiko Ota

Shigehito Yodo

Kengo Mitose

Masayuki Iwase

Yukihiro Kawamura

Shinji Nagasawa

Tomohiro Watanabe

Hiroyuki Kusaka

Takashi Tonoike

Hajime Mori

Akira Tachibana

Takeshi Aikiyo

Satoshi Takamura

Tomohiro Ishida

Takashi Kayahara

Shinya Kojima

Tomomichi Yasuoka

Ryosuke Nishii

Koichi Takagi

Toshihiko Ohta

Atsushi Shinozaki

Takashi Shigenaga

Renichi Yuguchi

Toshiaki Sakai

Seiichi Imamizo

Koichi Kobayashi

Motohiro Yamane

Akihiro Murakami

Shinji Ichikawa

Shinichiro Iizuka

Toshihiro Ochiai

Yasuo Uemura

Kousuke Kashiwagi

Hiroyuki Matsubara

Minoru Yokoyama

Masahiro Hirao

Keigo Matsunaga

Shigeyuki Furuta

Shirou Nakamura

Masao Ishikawa

Toshihiko Oota

Haruo Sakuma

Shingo Nishijima

Koji Kirikae

Kentarou Sakamoto

Takahide Kimura

Kazuo Konno

Kazuya Fukasawa

Koji Kuromiya

Takeshi Tanabe

Tomofumi Sato

Satoshi Asanuma

Kenji Taniguchi

A method of welding a workpiece by using a laser is provided which includes disposing a workpiece in a region to be irradiated with laser light from a laser oscillator; and irradiating the workpiece with the laser light from the laser oscillator such that an irradiated portion of the workpiece is melted and welded while sweeping the laser light over the workpiece by relatively moving the laser light and the workpiece. The laser light is formed of a main beam and an auxiliary beam, at least part of the auxiliary beam being disposed anteriorly in a sweep direction, and the main beam has a power density equal to or greater than a power density of the auxiliary beam.

Welding method and welding apparatus

A welding method includes: disposing a workpiece formed by stacking a plurality of metal foils in an area to be irradiated with laser light that contains a plurality of beams; irradiating a surface of the workpiece with the beams of the laser light by dispersing positions of the beams such that centers of the beams do not overlap with each other within a prescribed area on the surface; melting an irradiated part of the workpiece and performing welding; and setting each of the beams to have a power density with which no hole opens in the metal foils, and setting the power density of the beams and dispersing irradiating positions to be emitted so as to form a weld pool penetrating the workpiece by the beams.

A welding method includes: emitting laser beam toward a workpiece including a metal to melt and weld a part of the workpiece, the part being where the laser beam has been emitted to. Further, the laser beam includes a main power region and at least one auxiliary power region, a power of the main power region is larger than a power of each of the at least one auxiliary power region, and a ratio between the power of the main power region and the total of powers of the at least one auxiliary power region is in a range of 144:1 to 1:9.

A crimp terminal includes a crimp portion formed in a tubular shape with an electrically conductive the substrate and configured to crimp join with an electric wire, and a sealing portion formed at one end of the crimp portion and seals against an electric wire to be crimp joined to the crimp portion. At the sealing portion, the substrate is bent and lapped and continuously joined from one end portion to another end portion of this overlapped portion. One end of a joining trajectory is at a position that is deviated on a side opposite of the crimp portion with respect to the sealing portion.

Crimp terminal, connecting structure, manufacturing method of the crimp terminal, and laser welding method

A terminal manufacturing apparatus includes a pressing device adapted to form a chained terminal including a crimp portion by bending a continuously supplied plate-shaped workpiece into a hollow shape, the crimp portion being crimpable with a conductor part of a coated conductor accommodated therein, a welding device adapted to bring two edge portions of the crimp portion in proximity to each other and join the two edge portions by welding, a conveying/positioning time calculating unit adapted to determine a conveying/positioning time of the welding device on the basis of a machining time required by the pressing device and the welding device, and a conveying/positioning mechanism adapted to position the chained terminal in a welding machining position within the welding device in accordance with the conveying/positioning time.

Terminal manufacturing apparatus and welding apparatus

A laser welding apparatus that welds a butted interface of a workpiece by laser light irradiation while successively feeding the workpiece having the butted interface to a welding position includes an X- and Y-axis scanner that scans laser light outputted from a laser light source in an X-axis direction and a Y-axis direction which are orthogonal to each other, a measuring device that measures a dimension along the butted interface, and a scanner control device that controls driving of the X- and Y-axis scanner so as to weld the butted interface by laser light irradiation.

Laser welding apparatus and laser welding method

A method for manufacturing a crimp terminal having a crimp portion that allows crimp connection to a conductor part of a coated wire includes forming a tubular body by bringing together side edges of a plate material made of metal composed of a copper alloy having a copper content ratio of greater than or equal to 70%, irradiating a periphery of the sides edges, which are brought together, with laser light from a laser irradiation unit to weld the side edges which are brought together, and setting a power density of the laser light and a sweep rate of the laser light in such a manner that a weld bead formed at the side edge portion after the welding has a width of 80 &#x3bc;m to 390 &#x3bc;m.

Method for manufacturing crimp terminal, crimp terminal, and wire harness

In a female crimp terminal including a pressure-bonding section for permitting pressure-bonding and connection to an aluminum core wire of an insulated wire, the pressure-bonding section is configured in a hollow sectional shape by a plate material, and a long length direction weld portion in a long length direction is welded, a forward part in the hollow sectional shape is caused to take an almost flat plate-shaped sealing shape and a width direction weld portion in a width direction is welded.

Crimp terminal, connection structural body and connector

Disclosed is a method of producing an insulated electric wire, in which a primary coating layer including at least an enamel-baking layer is formed on a metallic conductor to form a primary coated electric wire, and a secondary coating layer is extrusion-formed on the primary coating layer of the primary coated electric wire. The method includes an electric wire pre-heating process where a surface of the primary coating layer is pre-heated using an electric wire pre-heating unit, and a resin extrusion process where a secondary coating layer is extrusion-formed on the pre-heated primary coating layer using a resin extrusion unit. Further disclosed is an apparatus for producing an insulated electric wire.

Method and apparatus for producing insulated wire

An optical module including first and second lens housings that individually receive first and second lenses; first and second optical fiber housings that individually receive end portions of optical fibers; first and second guide pins for positioning the first and second lens housings and the first and second optical fiber housings, with the first and second lens housings abutted against each other at their inner end faces and disposed between the first and second optical fiber units so as to be abutted thereto; two first positioning members provided between the first optical fiber housing and the first lens and between the second optical fiber housing and the second lens, respectively; and a second positioning member disposed between the first and second lenses.

Optical module

An optical module includes first and second fiber units that hold end portions of first and second optical fibers, and first and second collimators disposed between these fiber units and having first and second lenses, respectively. End faces of the first and second optical fibers are disposed on imaginary circumferences on the end faces of the first and second fiber units. Laser light beams from the end face of the first optical fiber are collimated by the first lens and then focused by the second lens, and enter the end face of the second optical fiber that is disposed diametrically opposite to the first optical fiber with respect to the center axis of the optical module.

Optical module, and multi-core optical collimator and lens housing therefor

An optical module comprises an optical fiber having a formed portion to form a fiber grating and a package to which the optical fiber is secured. The package comprises a single package member or at least two or more package members whose materials differ from each other. The optical fiber is secured to the package member. A distortion for adjusting a Bragg reflection wavelength of the fiber grating of the optical fiber is given to the package member.

An optical module comprising: a comb-shaped package having a plurality of teeth portions and a base portion; and at least one optical fiber having fiber grating, wherein respective fiber-grating formed portions of at least one optical fiber are placed in corresponding teeth portions and base portion of said package, and the optical fiber is fixed to the base portion and corresponding teeth portion in such manner that the fiber-grating formed portion exists between the base portion and the corresponding teeth portion.

Optical module and package thereof

A manufacturing apparatus for multi-fiber optical ferrule includes a spacer whose hardness is equivalent to or higher than the hardness of pins for forming fiber holes. Further, corner portions with respect to the arrangement direction of the pins for forming fiber holes of the spacer are formed as inclined surfaces or rounded surfaces.

Manufacturing apparatus for producing a multi-fiber optical ferrule

Growing community of inventors

Tokyo, Japan

Takashi Shigematsu