Finn pass forming device for forming seam welded steel pipes and roller device available for forming seam welded steel pipes of a plurality of sizes
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United States of America Patent
Stats
-
Mar 9, 1999
Grant Date -
N/A
app pub date -
Mar 10, 1997
filing date -
Jul 19, 1995
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
In the fin pass forming apparatus, the fin roller is split in two symmetrically with respect to the center line of the flow direction of a steel pipe to be formed, and a plurality of side rollers are arranged on a section perpendicular to the flow direction of the steel pipe. At least one fin roller stand is mixed in a group of roller stands including a cluster mill composed of a lower roller and a plurality of pairs of side rollers. The fin roller arranged in the cluster mill is split in two, one is a roller on the work side and the other is a roller on the drive side. The split fin rollers come into contact with a steel pipe to be formed at arbitrary positions in arbitrary directions in the circumferential direction of the steel pipe to be formed so as to conduct a fin pass formation. The plurality of fin pass forming rollers are arranged on a section different from the flow direction of the steel pipe to be formed.
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