Manufacturing method and manufacturing apparatus of pipe,...

Details Manufacturing method and manufacturing apparatus of pipe,... Manufacturing method and manufacturing apparatus of pipe,...

2006-08-22

2006-08-22

Suhol, Dmitry (Department: 3725)

Metal deforming

With use of control means energized in response to activator...

Metal deforming by use of roller or roller-like tool element

C072S208000, C072S009400, C072S011800, C072S031060, C702S170000, C378S054000

Reexamination Certificate

active

07093469

ABSTRACT:
A complex Fourier transform is performed on measured values of wall thickness at points in a cross section of a pipe in an axial direction, types of thickness deviation are classified, thickness deviation amount is calculated from the absolute value of the complex Fourier component, the position of a thick or thin portion of thickness deviation is calculated from the phase of the complex Fourier component, and manufacturing conditions of the pipe are adjusted based on these variables. The relationship r·exp(jθ) between the thickness deviation amount r and phase θ of a first-order thickness deviation obtained for cross sections in the axial direction is subjected to a complex Fourier transform as a function of pipe longitudinal direction, the thickness deviation is further classified by the frequency of twist of the thickness deviation, and an action is taken to prevent the thickness deviation according to the classified thickness deviation.

REFERENCES:
patent: 4099418 (1978-07-01), Bennett et al.
patent: 4196607 (1980-04-01), Youtsey et al.
patent: 6600806 (2003-07-01), Istar
patent: 6666094 (2003-12-01), Sauerland
patent: 6945083 (2005-09-01), Sauerland et al.
patent: 2001/0032064 (2001-10-01), Araki et al.
patent: 2004/0034501 (2004-02-01), Sauerland et al.
patent: 59-7407 (1984-01-01), None
patent: 59159218 (1984-09-01), None
patent: 61-135409 (1986-06-01), None
patent: 8-271241 (1996-10-01), None
patent: 2001-293503 (2001-10-01), None

Affiliated with

Also associated with

Rating

Manufacturing method and manufacturing apparatus of pipe,... does not yet have a rating. At this time, there are no reviews or comments for this patent.

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

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-3715041