| 摘要 |
PURPOSE:To perform stable welding by providing a prescribed gap between laminated steel plates consisting of steel plates and resin material having prescribed thicknesses, inclining backward a welding torch at an acute angle to the advancing direction of welding and subjecting the plates to butt welding by using a backing strip. CONSTITUTION:Laminated steel plates 1, 2 consisting of placing a resin 5 having 0.05-0.6mm. thickness between two sheets of steel plates having <=2.3mm. thickness are prepd. A gap (g) of 0.8-5mm. is provided between the resonant laminated plates 1 and 2 and a backing strip 6 is pressed thereto. A welding torch 7 is inclined backward at the angle theta smaller than 90 deg. to the advancing direction of welding and while the gas generated by decomposition of the resin 5 is expelled forward in the advancing direction of welding, the steel plates are butt welded to each other. |
