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 (5-33, Kitahama 4-chome, Chuo-ku, Osaka-sh, Osaka 41, 〒5410041, JP)
富澤 淳 (〒41 大阪府大阪市中央区北浜４丁目５番３３号 住友金属工業株式会社内 Osaka, 〒5410041, JP)
SHIMADA Naoaki (5-33, Kitahama 4-chome, Chuo-ku, Osaka-sh, Osaka 41, 〒5410041, JP)
嶋田 直明 (〒41 大阪府大阪市中央区北浜４丁目５番３３号 住友金属工業株式会社内 Osaka, 〒5410041, JP)
富澤 淳 (〒41 大阪府大阪市中央区北浜４丁目５番３３号 住友金属工業株式会社内 Osaka, 〒5410041, JP)
SHIMADA Naoaki (5-33, Kitahama 4-chome, Chuo-ku, Osaka-sh, Osaka 41, 〒5410041, JP)
嶋田 直明 (〒41 大阪府大阪市中央区北浜４丁目５番３３号 住友金属工業株式会社内 Osaka, 〒5410041, JP)
Application Number:
JP2009/068381
Publication Date:
May 06, 2010
Filing Date:
October 27, 2009
Export Citation:
Assignee:
SUMITOMO METAL INDUSTRIES, LTD. (5-33, Kitahama 4-chome Chuo-ku, Osaka-sh, Osaka 41, 〒5410041, JP)
住友金属工業株式会社 (〒41 大阪府大阪市中央区北浜４丁目５番３３号 Osaka, 〒5410041, JP)
SUMITOMO PIPE & TUBE CO., LTD. (3-5 Oaza Hikari, Kashima-shi Ibaraki, 14, 〒3140014, JP)
住友鋼管株式会社 (〒14 茨城県鹿嶋市大字光３番地５号 Ibaraki, 〒3140014, JP)
TOMIZAWA Atsushi (5-33, Kitahama 4-chome, Chuo-ku, Osaka-sh, Osaka 41, 〒5410041, JP)
富澤 淳 (〒41 大阪府大阪市中央区北浜４丁目５番３３号 住友金属工業株式会社内 Osaka, 〒5410041, JP)
住友金属工業株式会社 (〒41 大阪府大阪市中央区北浜４丁目５番３３号 Osaka, 〒5410041, JP)
SUMITOMO PIPE & TUBE CO., LTD. (3-5 Oaza Hikari, Kashima-shi Ibaraki, 14, 〒3140014, JP)
住友鋼管株式会社 (〒14 茨城県鹿嶋市大字光３番地５号 Ibaraki, 〒3140014, JP)
TOMIZAWA Atsushi (5-33, Kitahama 4-chome, Chuo-ku, Osaka-sh, Osaka 41, 〒5410041, JP)
富澤 淳 (〒41 大阪府大阪市中央区北浜４丁目５番３３号 住友金属工業株式会社内 Osaka, 〒5410041, JP)
International Classes:
B21D7/16; B21D7/12
Attorney, Agent or Firm:
HIROSE Shoichi (Tozan Building, 4-2 Nihonbashi Honcho 4-chome, Chuo-k, Tokyo 23, 〒1030023, JP)
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