Title:
METHOD AND DEVICE FOR MANUFACTURING BENT PRODUCT
Document Type and Number:
WIPO Patent Application WO/2010/050460
Kind Code:
A1
Abstract:
A method of manufacturing a bent product, wherein, even if the product must be provided with bends with various shapes or the product must be formed by bending a metal material having high strength, the method can perform such bending with high working accuracy and can obtain a large bend angle without impairing the surface properties of the metal material.
A steel pipe (1) is supported at a first position (A) while being fed in the longitudinal direction of the steel pipe (1), the steel pipe (1) being fed is partially heated at a second position (B), and the heated portion of the steel pipe (1) is cooled at a third position (C). Then, the position of a clamping means (15) for clamping the steel pipe (1) in a region (D) located downstream of the third position (C) is changed, in a work space including an empty space located on the upstream of the third position (C) in the feeding direction of the steel pipe (1), to a three-dimensional direction including the feeding direction of the steel pipe (1). Thus, bending moment is applied to the heated portion of the steel pipe (1) to produce the bent product having three-dimensionally bent portions provided intermittently or continuously to the steel pipe (1) in the longitudinal direction thereof.
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Inventors:
TOMIZAWA ATSUSHI (JP)
SHIMADA NAOAKI (JP)
INOUE SABURO (JP)
KUWAYAMA SHINJIRO (JP)
SHIMADA NAOAKI (JP)
INOUE SABURO (JP)
KUWAYAMA SHINJIRO (JP)
Application Number:
PCT/JP2009/068381
Publication Date:
May 06, 2010
Filing Date:
October 27, 2009
Export Citation:
Assignee:
SUMITOMO METAL IND (JP)
SUMITOMO PIPE & TUBE CO LTD (JP)
TOMIZAWA ATSUSHI (JP)
SHIMADA NAOAKI (JP)
INOUE SABURO (JP)
KUWAYAMA SHINJIRO (JP)
SUMITOMO PIPE & TUBE CO LTD (JP)
TOMIZAWA ATSUSHI (JP)
SHIMADA NAOAKI (JP)
INOUE SABURO (JP)
KUWAYAMA SHINJIRO (JP)
International Classes:
B21D7/16; B21D7/12
Domestic Patent References:
| WO2006093006A1 | 2006-09-08 | |||
| WO2006093006A1 | 2006-09-08 |
Foreign References:
| JPH10314852A | 1998-12-02 | |||
| JPH05212450A | 1993-08-24 | |||
| JP2007083304A | 2007-04-05 |
Other References:
See also references of EP 2368650A4
Attorney, Agent or Firm:
HIROSE SHOICHI (JP)
Hirose Shoichi (JP)
Hirose Shoichi (JP)
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