FIELD: manufacturing technology.
SUBSTANCE: invention relates to production of large-diameter pipes, in particular to welding of molded cylindrical workpieces. In the method of welding large-diameter pipes there used is a tubular billet with edges blunting without a tack weld. Tubular billet is placed in assembly and welding mill of assembly-welding mill, where by means of roller beams leveling edges along height and compressing tube billet throughout the assembly-and-welding stand. Then working suture is applied with laser or hybrid laser-arc welding with penetration of blunting. Laser head is positioned so that the welding bath is located in the middle of the length of the roller beams.
EFFECT: simple system for guiding the laser beam on the edge joint.
1 cl, 1 dwg
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