| 摘要 |
PURPOSE:To remove the fats and oils and moisture thoroughly from the surface of a flux cored welding wire electrode in the stage of producing said wire by packing a flux in a stainless steel hoop by conducting electricity to the wire with power feed rolls thereby heating the wire. CONSTITUTION:A wire W for welding of stainless steel produced by packing a flux into a hoop made of ferritic stainless steel is drawn out from a let-off machine 1 and is passed through a sizing machine 2, whereby the wire is trimmed to a linear shape. Said wire is passed through power feed rolls (a), (b), (c) and guiding rolls (d), (e), (f) which suppress the oscillations of the wire. Electricity is conducted to the rolls (a), (b), (c), to heat the wire at 500-750 deg.C and after the wire is held at these temps. for 0.08-2.0sec, the wire is cooled down to <=300 deg.C with a cooler 3 consisting of double pipe and is coiled on a coiler 5 with a take- up machine 4. The fats and oils such as lubricating oils on the wire surface are thoroughly removed, and the welding work is carried out stably on account of improvement in current conducting characteristics. |
