Title:
AUTOMATIC CONTROL METHOD OF ROLL TYPE PIPE CORRECTION MACHINE
Document Type and Number:
WIPO Patent Application WO/2006/106834
Kind Code:
A1
Abstract:
Automatic control method of a roll type pipe correction machine producing a stabilized correction effect. At the time of correcting a pipe by crushing it by means of a straightener equipped with three or more stands each having a pair of hole type rolls, automatic control of first through fourth steps is carried out. First step: the relation between a set value of the offset amount and the bending amount of a pipe measured on the exit side of the correction machine is calculated previously. Second step: the bending amount of the pipe is measured on the exit side of the correction machine. Third step: when the bending amount measured in the second step is out of a target range, a variation of the offset amount for limiting the bending amount of the pipe on the exit side of the correction machine within the target range is calculated according to the relation calculated in the first step. Fourth step: a set value of the offset amount at the time of correcting the next pipe is determined according to the variation of the offset amount calculated in the third step.
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Inventors:
KISHI MASATOMO (JP)
Application Number:
PCT/JP2006/306678
Publication Date:
October 12, 2006
Filing Date:
March 30, 2006
Export Citation:
Assignee:
SUMITOMO METAL IND (JP)
KISHI MASATOMO (JP)
KISHI MASATOMO (JP)
International Classes:
B21D3/02; B21D3/14
Foreign References:
| JP2001179340A | 2001-07-03 | |||
| JPH06114442A | 1994-04-26 | |||
| JP6088084B2 | 2017-03-01 | |||
| JP2001179340A | 2001-07-03 | |||
| JPH02207921A | 1990-08-17 | |||
| JPH0472619B2 | 1992-11-18 |
Other References:
See also references of EP 1870174A4
Attorney, Agent or Firm:
Hirose, Shoichi (4-2 Nihonbashi Honcho 4-chom, Chuo-ku Tokyo 23, JP)
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