Method and device for welding stiffener

PURPOSE: To enable the automatic welding without welding defects by providing a transmittant type photosensor and a laser displacement gage, and controlling an articulated welding equipment. CONSTITUTION: Rails 5 are placed parallel to each other on foundations 4 on both sides of a level block to load and support a horizontal main member 1 such as a box girder panel or a riveted girder where horizontal and vertical stiffeners 2, 3 are temporarily welded in the specified position, and a gate structure 6 which overpasses the level block is loaded on these rails 5 in a traveling manner. An operation panel 7, a control panel 8, a welding machine or the like are mounted on one side of the gate structure 6, and at the same time, a supporting body 10 which is capable of transverse movement and horizontal rotation about the center axis is provided, and NC control is executed by the control panel 8. The supporting body 10 is provided with a transmittant type photosensor 12 for detecting the starting part of the integrated right and left stiffeners, and a laser displacement gage 13 to measure the horizontal and the vertical displacement to detect the position of the stiffeners. COPYRIGHT: (C)1993,JPO&Japio