Electro-resistance-welded tube manufacturing apparatus and method
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United States of America Patent
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-
N/A
Issued Date -
Dec 19, 2002
app pub date -
Jun 11, 2002
filing date -
Jun 13, 2001
priority date (Note) -
Abandoned
status (Latency Note)
Importance
Abstract
A concave curved surface 28 having an arc configuration with the radius R as seen in a vertical cross sectional view is formed over an entire side surface of each of squeeze rolls 8. Below the concave curved surface 28 is provided a lower side flange portion 29; while above the concave curved surface 28 is provided an upper side flange portion 30. A virtual line that includes the center point of the radius R is provided parallel to a rotation shaft 22 of the squeeze roll 8 and facing the concave curved surface 28. With the distance from the virtual line to the lower side flange portion 29 taken as 'a' and the distance to the upper side flange portion taken as 'b', the relationship a
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