Kawasaki Jukogyo Kabushiki Kaisha

Sumitomo Metal Industries, Inc.

Tetsuro Noma

Shigetomo Matsui

Hiroyuki Matsumura

Munekatsu Furugen

Hisao Hasegawa

Koji Kadota

Hisahiko Miyazaki

Hiromichi Nakamura

Toshio Tsuta

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.

Method of and apparatus for continuous production of seam-welded metal

Growing community of inventors

Kobe, Japan

Tetsuro Noma