Yazaki Corporation

The University of Tokyo

Kenichi Hanazaki

Kazuhiro Murakami

Jun Yanagimoto

Satoru Yoshinaga

Yoshihiko Watanabe

Hiroyuki Murakoshi

Junichirou Tokutomi

Junichiro Tokutomi

Junichiro Shiomi

Tomokatsu Aizawa

Yuji Nitta

Sumio Sugiyama

Nobuhiro Tsuji

Yoshitaka Sugiyama

Yukiko Shimada

A carbon nanotube composite material includes a metallic base composed of a polycrystalline substance in which a plurality of rod-shaped metallic crystal grains are oriented in a same direction and a carbon nanotube conductive path, which is composed of a carbon nanotube, and forms a conductive path allowing electricity to conduct therethrough in a longitudinal direction of the metallic base by being present in a part of grain boundaries between the rod-shaped metallic crystal grains on a transverse plane of the metallic base, and being present along the longitudinal direction of the metallic base.

Carbon nanotube composite material and process for producing same

To provide a metal wire and an electric wire of high mechanical strength and high ductibility that have sufficiently increased ductibility as well as sufficiently increased mechanical strength. A metal wire manufactured at least by being subjected to an extension in which a metal wire is extended in an axial direction, and having a hardness distribution in which hardness decreases toward a specific peripheral portion from a central portion in a cross-section orthogonal to axis, whereby a softened peripheral portion becomes to show a good malleability as well as a high resistance to cracking, so as to attain an improvement of mechanical strength and ductibility.

Metal wire and electric wire

An element wire, an electric wire including the element wire or the element wires, and a process for producing an element wire are provided, by which ductility of a core wire consisting of the element wires can be improved. The element wire is made of metal, at least one element wire being coated with an electrically insulating coating so as to constitute an electric wire. The crystal grains constituting the entire element wire are fine isometric grains. In the process for producing the element wire, an electrically conductive material is subjected to drawing so as to reduce a diameter of the material and subsequently subjected to successive bending along a longitudinal direction of the material.

Element wire, electric wire and process for producing element wire

The present invention is intended to provide an enhanced conductor module capable of reducing a joint area between conductors, and a method for preparing the same. The conductor module has a pair of flattened circuits each of which comprises a rectangular shaped conductors, a pair of sheeted coverings disposed on both sides of the conductor, and at least one hole having a diameter smaller than a width of the conductor, and formed in the coverings so as to expose one surface of the conductor to outside the flattened circuit. The conductor of one flattened circuit is joined to the conductor of the other flattened circuit via the hole by application of electromagnetic welding.

Conductor module and electromagnetic welding method

One end of a terminal is formed in a tube shape, and a front end of a covered electric wire in which a part of a covering is peeled is inserted to the one end of the terminal, and is uniformly caulked from a periphery. A length of the peeled covering is shorter than a depth of the tube-like portion of the terminal. Accordingly, a part of the covering is received in the tube-like portion and caulked so as to serve as an operation of a packing, thereby preventing a water and an air from entering into an inner portion of the tube-like portion. Further, since the tube-like portion is uniformly caulked so as to be closely contact with the electric conductor, it is possible to obtain a comparatively large contact area, and it is possible to obtain a stable conduction.

Structure of mounting terminal to covered electric wire and method thereof

A process for joining metals is provided, by which a core wire of a coated electric wire can be securely joined to a metal having a plated layer on the surface thereof. The process is to assemble a wiring module . The wiring module has a metal piece , a coated electric wire and so on. A plated layer made of tin is formed on a surface of a matrix of the metal piece . The coated electric wire has a core wire . An ultrasonic welding is carried out after placing a part of the core wire on the plated layer of the metal piece . The plated layer is melted so as to join the part of the core wire to the matrix and the core wire is broken off separating the part therefrom. Another ultrasonic welding is carried out after further placing another core wire on the part joined to the matrix , so that the core wire of the coated electric wire is joined to the metal piece through the part of the core wire

Process for joining metals

The object is to provide a method of connecting covered wires mutually which can solve increasing cost. Each of the covered wires is comprised of a conductor and a cover The covered wires are connected to each other by ultrasonic welding. An ultrasonic welding machine includes a chip and an anvil. The covered wires are placed between the chip and the anvil. The chip is located with the length of its cross section disposed along the length of the other covered wire The chip and the anvil are pushed toward each other and the chip is vibrated. Friction heat is generated between the covered wires The covers are adhered together and the conductors are bonded to each other by ultrasonic welding.

Growing community of inventors

Shizuoka, Japan

Kenichi Hanazaki