Mitsubishi Electric Corporation

Agc Inc.

Yoji Nakajima

Syuichiro Ishihara

Hisashi Yamada

Hiroichiro Shimano

Hisakatsu Kawarai

Tatsuya Abe

Shigeru Aida

Yuko Tachibana

Masakazu Ataku

Toshifumi Kakiuchi

Takuya Ogawa

To provide an ETFE copolymer and a wire coating resin material capable of forming a coating layer which is excellent in stress cracking resistance under a high temperature and which has a high heat resistance temperature, and an electric wire having a coating layer which is excellent in stress cracking resistance under a high temperature and which has a high heat resistance temperature. A copolymer comprising structural units derived from ethylene, structural units derived from tetrafluoroethylene, and structural units derived from a third monomer, wherein in an elution curve obtained by a temperature rising elution fractionation method with respect to the copolymer, a ratio (L/H) of a proportion (L: area %) of components with elution temperatures of from 190 to 200&#xb0; C. to a proportion (H: area %) of components with elution temperatures of at least 205&#xb0; C., and a proportion (M: mol %) of structural units derived from the third monomer based on all structural units of the copolymer, satisfy a relation of log (L/H)/M&#x2265;0.90.

Copolymer, method for its production, wire coating resin material and electric wire

Provided is a sample plate for mass spectrometric analysis, which comprises a substrate and a metal thin film formed on the substrate. The metal thin film contains Ag, Al or Cu as the main component and further contains a specific additive element M, Mor Mdepending on the element as the main component, in a ratio (M/Ag) of the total number of atoms of the additive element Mto the number of atoms of Ag of from 0.001 to 0.5, a ratio (M/Al) of the total number of atoms of the additive element Mto the number of atoms of Al of from 0.001 to 0.5, or a ratio (M/Cu) of the total number of atoms of the additive element Mto the number of atoms of Cu of from 0.001 to 0.5.

Sample plate for mass spectrometric analysis, mass spectrometric analysis method, and mass spectrometric analysis device

An electrical discharge machining apparatus includes: a surface plate; a machining tank that surrounds the surface plate, retains a machining liquid, and has at least a part that serves as a substantially box-shaped vertically moveable ascent/descent machining tank, the ascent/descent machining tank having an outlet in an ascent/descent inner wall of the ascent/descent machining tank; an ascent/descent device that raises and lowers the ascent/descent machining tank; a sub-tank that receives the machining liquid that overflows from the machining tank; a slit that is provided in an end wall of the sub-tank for allowing a connection member to pass through, the connection member connecting the ascent/descent machining tank and the ascent/descent device; and a seal that is arranged in a gap between the ascent/descent machining tank and an inner wall of the sub-tank and prevents the machining liquid in the machining tank from leaking out into the sub-tank.

Electrical discharge machining apparatus

A wire electric discharge machine includes: a wire electrode supporting device that holds one end portion of a wire electrode; and a wire electrode forwarding device that has a forwarding device supplying a fluid to forward the wire electrode from a wire electrode guiding section to a wire electrode collecting section, a rotating body positioned on a path between the forwarding device and the wire electrode collecting section and diverting the forwarding direction of the wire electrode, and a rotation restraining device restraining rotation of the rotating body rotated by the fluid supplied from the forwarding device.

Wire electric discharge machine and wire electrode forwarding method used in the same

To provide a wire electrode removal device of a wire electric discharge machine, the wire electrode removal device including a wire-electrode guide unit that guides an end on a cut point side of a wire electrode cut by wire-electrode cut devices to outside of a running path, a rewind shaft that pressure-fixes the wire electrode on the cut point side guided by the wire-electrode guide unit with an end face thereof and rewinds the wire electrode on a columnar member having angular portions with subsequent rotational driving thereof, a rewind-shaft drive unit that drives the rewind shaft to perform pressure fixing or pressure releasing of the wire electrode with the rewind shaft, a scraper member that removes a wound wire electrode from the columnar member at a time of pressure releasing of the rewind shaft by the rewind-shaft drive unit, and a collection member that collects the removed wire electrode.

Wire electric discharge machine and wire electrode removal device

A wire electric-discharge machining device and wire-electrode removing device are provided. The wire-electric discharge machining device includes a wire-electrode cutting unit that is arranged in a running path of a wire electrode, and a removing unit configured to remove the wire electrode cut by the wire-electrode cutting unit from the running path. The removing unit includes a wire-electrode guide unit that is arranged below the wire-electrode cutting unit and includes a through hole configured to receive a wire-electrode guide pipe and further configured to receive the wire electrode in the running path. The wire-electrode guide unit is configured to guide an end of the wire electrode to a position outside the running path, with the cut wire electrode provided in the through hole, by rotationally moving about a wire-electrode guide shaft.

Wire electric-discharge machining device and wire-electrode removing device configured to remove cut wire-electrode

Electric discharge machine

A wire aspiration device includes a first member having a first curved surface with a projected portion that is in close contact with peripheral surfaces of first and second recovery rollers on one side, a second member having a second curved surface with a projected portion that is in close contact with the peripheral surfaces of the first and second recovery rollers on the other side, and a third member having a through hole formed in a central portion thereof to cause the ejected wire electrode to run in the wire-electrode recovering direction and coupling the first and second members to form two grooves between the first and second curved surfaces to be in contact with the through hole, wherein a fluid spout for spouting a fluid into the through hole in the recovering direction is formed in any of the first, second, and third members.

Wire aspiration device and wire recovery device

An electrical-discharge machining apparatus for machining a workpiece using an aqueous machining fluid includes an insulator for electrically insulating a machine platen from the workpiece where the workpiece is placed. A machining-fluid-property measuring instrument measures the state of the machining fluid; and a machining-fluid-property controller maintains the pH of the machining fluid so as to be kept within 8.5 through 10.5.

Electrical discharge machining apparatus and electrical discharge machining method

In an electric discharge machining apparatus that machines a workpiece () by using a water-based dielectric fluid as a dielectric fluid while a voltage is being applied to a machining gap between an electrode () and the workpiece (), the electric discharge machine includes: an anticorrosive power source section () that applies a predetermined voltage by taking the workpiece () as a cathode and taking as an anode an anticorrosive electrode () opposing the workpiece () with an insulator () therebetween; a dielectric fluid quality measuring instrument () that measures a quality of the dielectric fluid; and a dielectric fluid quality control section () that controls a pH level of the dielectric fluid to be within a range from 8.5 to 10.5 on the basis of the measured result of the dielectric fluid quality measuring instrument ().

Growing community of inventors

Chiyoda-ku, Japan

Yoji Nakajima