Method of and apparatus for continuous production of seam-welded

Metal fusion bonding – Process – With shaping

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228147, 228222, 228232, 228 17, 228 175, 228 46, 219 617, B23K 3106

Patent

active

047967986

ABSTRACT:
An apparatus for continuous production of seam-welded steel tubing is proposed. The apparatus includes a series of shaping rolls for shaping a strip taken out from a strip coil into a tubular intermediate product, the roll series including a finpass roll group. The tubular product is subjected to seam welding under the action of a seam welder. Before arrival at the welder, a substantial main part of the preformed tubing with exception of opposing edge zones thereof is subjected to heating by a heater compensate for excess compressive stresses induced in the edge zones, while these zones are subjected to cooling by a cooler for avoiding otherwise formation of disadvantageous edge wavings which would otherwise occur.

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