Kobe Steel, Ltd.

Oiles Industry Co., Ltd.

Honda Giken Kogyo Kabushiki Kaisha

Eiji Sato

Kikuo Sumiyoshi

Kingo Miyasaka

Kei Yamazaki

Keiichi Suzuki

Masahiro Honma

Masayoshi Izumi

Masamitsu Kojima

Yoshihiro Katsui

Masahiro Yokota

Kazuo Hirai

Hideto Arigaya

Akira Ogawa

Takeshi Yano

Baini Jo

Gas-shielded arc welding in which the tip-to-work distance changes is configured so that fluctuations in welding current are curbed while arc length control is maintained. This is achieved with a corrected current calculating unit that includes a first controlling expression where a first gain Gis multiplied by an instantaneous voltage error value that is the difference between an instantaneous output voltage setting value and an output voltage detection value, and/or a second controlling expression where a second gain Gis multiplied by an average voltage error value that is the difference between an output voltage setting value and an average output voltage detection value of a pre-set period of time, determines an arc property gain Gand/or Gbased on a torch position detection value determined by a torch position determinator, and calculates a corrected current based on the first and/or the second controlling expression.

Output control method for gas-shielded arc welding, welding system, welding power source, and welding control device

A welding control apparatus includes an integrator for starting calculation of a voltage error integral value Svwhen a first pulse period ends and a second pulse period starts in a pulse cycle, based on various data. The apparatus also includes a comparator for comparatively determining whether a value of the voltage error integral value Svprovided as the calculation result has become 0, and a waveform generator for terminating the relevant pulse cycle and starting a next pulse cycle when the value of the voltage error integral value Svis 0. Where2=&#x222b;{(2&#x2212;2)+2&#x2212;2}&#x2003;&#x2003;(1).

Welding control apparatus for pulse arc welding of consumed electrode type, arc length control method for use with the same, and welding system including the welding control apparatus

A tandem pulse arc welding control apparatus includes a voltage detector; a voltage setting unit; a pulse-peak-current-reference-value setting circuit; a pulse-base-current-reference-value setting circuit; an error amplifier that calculates a pulse-peak-current variation value and a pulse-base-current variation value; an adder that calculates a pulse-peak-current value; an adder that calculates a pulse-base-current value; a pulse-waveform selection circuit that outputs the pulse-peak-current value in a pulse peak period, and that outputs the pulse-base-current value in a pulse base period; and an output control circuit that controls a current value for a second welding wire. Because an appropriate welding voltage can be obtained with this configuration, a high welding quality can be realized.

Tandem pulse arc welding control apparatus and system therefor

The present invention provides a welding control apparatus including: a droplet separation detecting unit that detects separation of a droplet from a tip end of welding wire; and a waveform generator that alternately generates a first pulse for separating the droplet and a second pulse for shaping the droplet and outputs the generated pulse to a welding power source, the waveform generator generating a third pulse having a pulse shape different in a pulse peak current and/or a pulse width from the second pulse to output the generated third pulse to the welding pulse source after a base time of the first pulse if separation of the droplet is not detected within a peak period, a falling slope period, or a base period of the first pulse to thereby restore a droplet supply regularity.

Welding control apparatus and method

A sliding member is provided which comprises a base body made of a firmly entangled and collapsed metal fine wire, with the voids formed between the metal fine wires constituting the metal mesh being filled compactly with a heat resistant material, the sliding surface of the base body being formed into a smooth surface with either a lubricant that fills a number of small holes formed in the heat resistant material as well as covering the surface thereof or the lubricant and the metal fine wires being exposed. A manufacturing method of the same is also disclosed which basically comprises the steps of preparing a metal mesh as a reinforcing material, preparing a sheet-like heat resistant material with a plurality of small holes being formed through the thickness, applying a lubricant on the sheet-like heat resistant material in a given thickness so as to simultaneously fill the small holes, putting the sheet-like heat resistant material on the metal mesh to provide a laminate in which the lubricant is directed towards the sliding surface to be formed, convoluting the laminate about a cylindrical mandrel so as to represent a cylindrical preform and putting the preform in a metal die to axially compress it to provide the final product.

Sliding member and a method for manufacturing the same

A heat-resistant shift member is disclosed which comprises a fundamental body having substantially a desired configuration and formed of one or more of compressed heat-resistant materials such as expanded graphite with entangled wires being firmly embedded therein, and a shifting surface layer member integrally covering the shifting surface of the fundamental body which is formed of one or more of compressed other heat-resistant materials, such as asbestos as well as one or more of powdered solid lubricant compounds such as metallic sulphide with entangled other metal wires made of copper alloy being firmly embedded therein, whereby both of the metal wires are also partially entangled with each other. There is also disclosed a method for manufacturing the same.

Heat-resistant shift member

A heat-resistant shift member is disclosed which comprises (i) a fundamental body having substantially a desired configuration and formed of one or more of compressed heat-resistant materials such as expanded graphite with entangled wires being firmly embedded therein, and (ii) a shifting surface layer member integrally covering the shifting surface of the fundamental body which is formed of other compressed sheet-like heat-resistant materials such as asbestos, a heat-resistant sheet material made of fibers of asbestos, etc. laid thereon, one or more of powdered solid lubricant compounds such as metallic sulphide laid on the outer surface of the heat-resistant sheet material, polytetrafluoroethylene resin adhered to the outer surface of the powdered solid lubricant compound so as to partly penetrate into the porous surface thereof and partly form a coating thereon, and the metallic wires made of fine stainless steel wires to enclose the heat-resistant sheet material, the solid lubricant compounds and the polytetrafluoroethylene resin therein, whereby the wires of the fundamental body and the shifting surface layer are partially entangled with each other so that the solid lubricant compounds as well as the polytetrafluoroethylene resin are exposed on the shifting surface in a specific ratio with their being held by and filling the gaps formed between the entangled metal wires. There is also disclosed a method for manufacturing the same.

Growing community of inventors

Fujisawa, Japan

Eiji Sato