PIPE MANUFACTURING WELDING METHOD USING ENERGY BEAM

摘要

PURPOSE:To improve the productivity by projecting an energy beam within specific dimensions at both sides of a seam at the position where the edge end faces of the upstream of either squeeze stand among second and succeeding plural squeeze stands are stuck fast to each other to perform the welding while melting the edge faces. CONSTITUTION:A metal band 5 is formed tubularly by a group of rolls and the edge end faces of the metal band 5 are once closed to form the seam 6' by first squeeze rolls 1 via a seam guide 4. Next, the seam 6' is slightly opened by the spring back at the downstream of the first squeeze rolls 1 but again stuck in the vicinity of second squeeze rolls 2. At this time, the energy beam E operates an energy beam optical system 9 so that the beam projecting position is set within 0.3 mm at both sides of the seam 6 center via an energy beam position controller 8 on the stuck seam F of the upstream of the second squeeze rolls 2 to perform the seam welding.