Method of and apparatus for producing tubes of metal

Details Method of and apparatus for producing tubes of metal Method of and apparatus for producing tubes of metal

2005-12-20

2005-12-20

Tolan, Ed (Department: 3725)

Metal deforming

By use of tool acting during relative rotation between tool...

During rotation of work

C072S208000

Reexamination Certificate

active

06976377

ABSTRACT:
In the planetary skew rolling blooms to form seamless metal tubing or pipe the internal tool is retracted at the leading and/or trailing end of the tubular bloom to allow the rolls to seal the end or ends and prevent coolant from entering the rolled tubing or bloom. The internal tool is advanced back into its normal rolling position after the end has passed the rolling location.

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patent: 4928507 (1990-05-01), Staat et al.
patent: 5524467 (1996-06-01), Wetzels
patent: 5644938 (1997-07-01), Moeltner et al.
patent: 6497129 (2002-12-01), Pfeiffer et al.
patent: 6651473 (2003-11-01), Roller
patent: 2002/0116971 (2002-08-01), Roller
patent: 101 07 567 (2002-08-01), None

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