| 摘要 |
Longitudinal welding of pipes to flat steel strips, in which the pipes are pressed against the strips and are longitudinally displaced during the welding process by means of a known conveying device (10), is characterised by the fact that, simultaneously with production of the top seams by means of a UP welding process, the bottom seams are produced by means of a combined MPG pulse and pendulum welding process. The lateral pendulum motion, which is coordinated with the feed rate of the items to be joined. of the welding torches (11) is produced by a pendulum unit (15) which constitutes a characteristic feature of the appts. |
