Kobe Steel, Ltd.

Kobelco Robotix Co., Ltd.

Takashi Yashima

Shun Izutani

Keito Ishizaki

Naoki Mukai

Masahiro Yokota

Shinobu Toda

Hirofumi Kawasaki

Masaru Kodama

In this welding control method for a portable welding robot that moves along a guide rail, for using the portable welding robot to weld a workpiece including a groove: a groove shape detection position is established in at least one location in a welding sector extending from a welding starting point to a welding end point; the groove shape at a groove shape detection position Pis sensed by means of a detecting means of the portable welding robot, which is moving along the guide rail; groove shape information is calculated from detection data obtained by the sensing; and a welding condition is acquired on the basis of the groove shape information.

Welding control method and welding control device for portable welding robot, portable welding robot, and welding system

A flux-cored wire comprising a flux which is a core and a hoop which is an outer skin or sheath is described. The flux includes a strong deoxidizing metal element containing Mg and Al, and a fluoride powder. At least 60 mass % of a strong deoxidizing metal powder related to the strong deoxidizing metal element has a grain size of at most 150 μm. At least 60 mass % of the fluoride powder has a grain size of at most 75 μm. The flux is present at a concentration of 10-30 mass % relative to a total mass of the flux-cored wire. The flux-cored wire also requires a specific composition of elements.

Flux-cored wire and welding method

The present invention relates to a flux-cored wire for positive polarity gas-shielded arc welding use, in which a flux contains a metal powder and also contains BaFand SrFand AlFand/or CaFas fluorides wherein the content of BaFis 1.0 to 4.5%, the content of SrFis 2.0% or less, the content of CaFis 0.45% or less and the content of AlFis 0.70% or less, at least one of metal elements constituting the flux and the fluorides is a strong deoxidizing metal element having a specified standard formation Gibbs energy, and the content of each of an oxide and a carbonate in the flux is 0.5% or less.

Flux-cored wire, welding method, and weld metal

A welding device for gas shielded arc welding includes: a portable welding robot mounted with a welding torch including a nozzle that guides jetting of shielding gas and a contact tip that performs energization on a consumable electrode; a feeding device that supplies the consumable electrode to the welding torch; a welding power source that supplies electric power to the consumable electrode via the contact tip; a gas supply source that supplies the shielding gas to be jetted from a nozzle end; and a control device that controls the portable welding robot. When the welding torch is seen from a side of jetting of the shielding gas, the contact tip is placed in an inside of an opening of the nozzle, the nozzle and the contact tip have a relatively movable structure, and an inner diameter of the nozzle end is within a range of 10-20 mm.

Welding device, and welding method employing welding device

In an arc welding method of performing welding by employing COgas as shield gas, supplying a welding current to flow between a welding wire and a workpiece to be welded while feeding the welding wire toward the workpiece, and generating an arc with the welding current, the arc welding method includes a welding step of performing the welding of the workpiece while executing control to adjust the welding current, and a welding termination step of executing control to apply the welding current having a trapezoidal waveform when the welding of the workpiece is terminated.

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Fujisawa, Japan

Takashi Yashima