DEVICE FOR DRAWING TUBULAR WORKPIECE

WIPO Patent Application WO/2010/021350

A1

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).

JPS54118372	PRODUCTION OF COLD DRAWN STEEL PIPE FROM ELECTRICALLY SEAMED STEEL PIPE
JP2756194	INDUSTRIAL APPLICABILITY [Title of Invention]
JP3862790	HIGH PRESSURE FUEL INJECTION PIPE MATERIAL AND MANUFACTURE THEREOF

HISAYUKI KOJI (JP)
AOYA SHIGERU (JP)
OHIDE MASAAKI (JP)

PCT/JP2009/064540

February 25, 2010

August 20, 2009

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SHOWA DENKO KK (JP)
HISAYUKI KOJI (JP)
AOYA SHIGERU (JP)
OHIDE MASAAKI (JP)

B21C1/22; B21C3/02; B21C3/16

JPH04309409A	1992-11-02
JP2005279750A	2005-10-13

SHIMIZU Yoshihito et al. (JP)
Yoshihito Shimizu (JP)

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