| 摘要 |
The device for making a peripheral welding seam on a cylindrical tube (1) is attachable on the tube (1), is equipped with a rotary drive (15) for a rotational movement of the welding tool about the tube axis and is defined in that it has two rotatable rollers (10, 12) fastened to the device and arranged fixedly at a distance from one another in the peripheral direction and a third pivotable drive roller (15) connected to the drive. In the cross-sectional direction of the tube (1), the space between the rollers (10, 12, 15) has a larger dimension than the tube (1). When the dirve roller (15) is partially pivoted away, a lateral insertion orifice for the tube is consequently provided and likewise has larger dimensions than the tube (1).
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