| 摘要 |
PURPOSE:To provent thoroughly floating of the end parts of a pair of light-gage metallic strips, which are cut in the transverse direction and are to be butted, from a backing strip at the butt line by curving said ends on the backing strip and welding the same. CONSTITUTION:A light-gage metallic strip 2a is cut transversely prior to welding and the linear cut end face 2a' thereof is brought into tight contact with a solid plane, for example, a backing strip 5. The strip is deformed to bend at the surface 2a' or the part near the same as a fulcrum within the range where the light-gage strip is not plastically deformed. Force is then acted at any point on the end face in the direction where the light-gage strip is pressed to the strip 5 by which the tight contact of the surface 2a' with the strip 5 is assured. The other light-gage metallic strip 2b of which the end face is similarly curved is prepd. The strip 2a is clamped 1 and is at the same time slid on the strip 5 until the surface 2a' coincides with the weld line 4. The strip 2b is also slid similarly in succession thereto and thereafter the strips are welded to each other. |
