Method and device for manufacturing UOE steel pipes

Details Method and device for manufacturing UOE steel pipes Method and device for manufacturing UOE steel pipes

2007-06-19

2007-06-19

Larson, Lowell A. (Department: 3725)

Metal deforming

By tool-couple pressing together adjacent surface portions...

To form longitudinally-seamed tube

C072S052000, C072S368000

Reexamination Certificate

active

11473045

ABSTRACT:
A method and device for manufacturing UOE steel pipes, wherein, when an opening width of the U-can obtained by U-ing press is larger than the die-diameter in an O-press of later step, while said opening is narrowed from the front end by the closing rolls disposed before said O-press and/or at least at the entrance portion of the O-press to be smaller than the die-diameter of said O-press, the U-can is simultaneously conveyed into the O-press, and then, after charging into the O-press, undergoes O-ing press to yield an O-can. The device is preferably configured to have the closing rolls disposed in a roll stand and consisted of multiple pairs, to have a mechanism to prevent the U-can from moving upward during narrowing the opening width, and to have the function of conveying the U-can. Thus, UOE steel pipes for high-strength application corresponding to X80 grade can be efficiently manufactured.

REFERENCES:
patent: 672689 (1901-04-01), Whitehouse
patent: 4148426 (1979-04-01), Midzutani et al.
patent: 4460118 (1984-07-01), Ataka et al.
patent: 5301869 (1994-04-01), Toyooka et al.
patent: 54-062161 (1979-05-01), None
patent: 59-202122 (1984-11-01), None
patent: 59-232620 (1984-12-01), None

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