| 摘要 |
PURPOSE:To prevent melt sticking between a welding wire and a contact chip by forming recesses having a specific size, shape and distribution density on the surface of said wire thereby feeding smoothly the wire in a conduit tube. CONSTITUTION:Recesses 1 of (5S)<-1>-4X(5S)<-1> pieces for each 1mm.<2> surface area are formed on a welding wire in the longitudinal direction thereof and a lubricating oil having rust preventiveness is coated in the surface recesses and a smooth part 2. S denotes the average area mm.<2> for each one piece of the recesses on the welding wire surface. |
