Automatic welding of large sheet sections of arcuate railway carriage roof - by locating sheets in position and welding using upper and lower movable electrodes on frame with 3=dimensional shielding system

摘要

Method of welding together large area sheet segment which do not have any joining profile edges in which the parts are located in position and an upper and lower electrode moveable on a portal frame in a 3D shielding system carry out the weld joints. The electrodes are monitored by a sensor device which can make directional correction with the help of a correcting device. The welding process can be resistance, spot or roller welding and/or arc welding. The portial frame is movable on motorised (5) rack and pinion units (29,30). The slide system (6a,7a; 6b,7b; and 8a,9a; 8b,9b) have their own motors (16,28). The profiled construction to be welded is located on a tiltable device (18.1; 18.2; 18.3). USE/ADVANTAGE - Making arched railway carriage roofs. The appts. is flexible enough to produce different types of welds automatically.