Title:
DEVICE FOR DRAWING TUBULAR WORKPIECE
Document Type and Number:
WIPO Patent Application WO/2010/021350
Kind Code:
A1
Abstract:
A drawing device (10) is provided with a drawing die (20) and a drawing plug (30). The drawing die (20) is provided with a first curved surface section (1C) from which the tubular workpiece (40) is separated while being reduced in diameter, a die bearing section (2B) located on the inner side of and downstream of a workpiece separation point (K) in the first curved surface section (1C), and a guide section (2D) having a second curved surface section (2C) smoothly connecting to an upstream end (F) of the die bearing section (2B). The guide section (2D) is a section which again makes contact with the workpiece (40) separated from the first curved surface section (1C) and guides the workpiece (40) to the die bearing section (2B) while reducing the diameter of the workpiece (40). The drawing plug (30) has a plug bearing section (3B) having a length less than the length (L4) of the die bearing section (2B). The plug bearing section (3B) is provided at a position corresponding to the die bearing section (2B).
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Inventors:
HISAYUKI Koji (SHOWA DENKO K.K. 480, Inuzuka 1-chom, Oyama-shi Tochigi 78, 〒3238678, JP)
久幸 晃二 (〒78 栃木県小山市犬塚１丁目４８０番地 昭和電工株式会社小山事業所内 Tochigi, 〒3238678, JP)
AOYA Shigeru (SHOWA DENKO K.K. 480, Inuzuka 1-chom, Oyama-shi Tochigi 78, 〒3238678, JP)
久幸 晃二 (〒78 栃木県小山市犬塚１丁目４８０番地 昭和電工株式会社小山事業所内 Tochigi, 〒3238678, JP)
AOYA Shigeru (SHOWA DENKO K.K. 480, Inuzuka 1-chom, Oyama-shi Tochigi 78, 〒3238678, JP)
Application Number:
JP2009/064540
Publication Date:
February 25, 2010
Filing Date:
August 20, 2009
Export Citation:
Assignee:
SHOWA DENKO K.K. (13-9, Shiba Daimon 1-chome Minato-k, Tokyo 18, 〒1058518, JP)
昭和電工株式会社 (〒18 東京都港区芝大門一丁目１３番９号 Tokyo, 〒1058518, JP)
HISAYUKI Koji (SHOWA DENKO K.K. 480, Inuzuka 1-chom, Oyama-shi Tochigi 78, 〒3238678, JP)
久幸 晃二 (〒78 栃木県小山市犬塚１丁目４８０番地 昭和電工株式会社小山事業所内 Tochigi, 〒3238678, JP)
昭和電工株式会社 (〒18 東京都港区芝大門一丁目１３番９号 Tokyo, 〒1058518, JP)
HISAYUKI Koji (SHOWA DENKO K.K. 480, Inuzuka 1-chom, Oyama-shi Tochigi 78, 〒3238678, JP)
久幸 晃二 (〒78 栃木県小山市犬塚１丁目４８０番地 昭和電工株式会社小山事業所内 Tochigi, 〒3238678, JP)
International Classes:
B21C1/22; B21C3/02; B21C3/16
Attorney, Agent or Firm:
SHIMIZU Yoshihito et al. (Idemitsu Nagahori Building, 4-26 Minamisemba 3-chome, Chuo-ku, Osaka-sh, Osaka 81, 〒5420081, JP)
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