Method of manufacturing seamless tube

Details Method of manufacturing seamless tube Method of manufacturing seamless tube

2006-09-05

2006-09-05

Tolan, Ed (Department: 3725)

Metal deforming

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

During rotation of work

Reexamination Certificate

active

07100410

ABSTRACT:
A method of manufacturing a seamless tube by the invention can duly control the rotary forging effect without miss-rolling such as defective onset engagement with rolls by satisfying either of (1)–(3) formulas below, dependent on a given range of roll diameter ratio Dg/D1,prevent the occurence of internal surface flaws at the top of the work material attributable to deteriorated hot workability, and further prevent the occurrence of said flaws over the remaining length without altering parameters for piercing-rolling process. Thus, the invention can be widely utilized as an excellent manufacturing method for said tube:in case of Dg/D1<1.1,in-line-formulae description="In-line Formulae" end="lead"?23≦N/(Df/100)≦40,  (1)in-line-formulae description="In-line Formulae" end="tail"?in case of 1.1≦Dg/D1<1.5,in-line-formulae description="In-line Formulae" end="lead"?20≦N/(Df/100)≦44,  (2)in-line-formulae description="In-line Formulae" end="tail"?in case of 1.5≦Dg/D1≦1.8,in-line-formulae description="In-line Formulae" end="lead"?20≦N/(Df/100)≦48.  (3)in-line-formulae description="In-line Formulae" end="tail"?

REFERENCES:
patent: 4827750 (1989-05-01), Hayashi
patent: 5636542 (1997-06-01), Yamakawa et al.
patent: 5713234 (1998-02-01), Yamakawa et al.
patent: 6089066 (2000-07-01), Cernuschi et al.
patent: 9610024.5 (1996-03-01), None
patent: 69620310 (2002-11-01), None
patent: 0754503 (1997-01-01), None
patent: 61-003605 (1986-01-01), None
patent: 62-282713 (1987-12-01), None
patent: 03-013222 (1991-01-01), None
patent: 6-218406 (1994-08-01), None
patent: 06-218406 (1994-08-01), None
patent: 2000-140911 (2000-05-01), None
patent: WO96/21526 (1996-07-01), None

Affiliated with

Also associated with

Rating

Method of manufacturing seamless tube does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Method of manufacturing seamless tube, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method of manufacturing seamless tube will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-3538795