METHOD FOR WELDING STEEL PLATE IN BUTT WELDING MACHINE AND BUTT WELDING MACHINE

摘要

PURPOSE: To uniformize welding strength and to control a reinforcement part by continuously measuring a groove interval from a welding starting vicinity to a welding completing vicinity during welding, and changing a butt amount so as to definitely keep the groove interval from the welding starting edge to the welding finishing edge corresponding to the variation. ;CONSTITUTION: By measuring a groove interval 5 during welding, the thermal contraction of a welding part at a welding time can be quantitatively obtained. Next, this thermal contraction amount is expressed in term of a butt position, if a change of the butt position at a present time point is generated against the butt position set at an initial time, the groove interval 5 in the time welding at the welding starting point and the groove interval 5 in the present welding time point can be made constant by moving the butt position set at initial time, that is, moving the butt position in the direction opposite to the thermal contraction direction, so this movement is continuously executed until the welding finishing time point, a metal structure uniform in the plate lateral direction can be formed.;COPYRIGHT: (C)1994,JPO&Japio