Login| Sign Up| Help| Contact|

Patent Searching and Data


Title:
HOT FORMING APPARATUS FOR METAL TUBE AND HOT FORMING METHOD USING THE SAME
Document Type and Number:
Japanese Patent JP2011020137
Kind Code:
A
Abstract:

To provide a hot forming apparatus for a metal tube capable of fundamentally solving heat transfer problem of a metal tube by contact with a mold, and also to provide a hot forming method using the same.

The hot forming apparatus for the metal pipe includes: a mold for clamping the heated metal tube; a shaft pushing device having a medium supply port at a molding surface, having a medium supply tube communicating with the medium supply port at the inside, and carrying out shaft pushing while closing the end of the clamped metal tube; a medium feed means connected with the medium supply tube of the shaft pushing device and feeding medium vaporized and expanded by the temperature of the metal tube and bulging the metal tube along the molding surface of the mold to the inside of the metal tube. The hot forming method using the same includes a step for clamping the heated metal tube by the mold and a shaft pushing step for carrying out the shaft pushing while closing the end of the clamped metal tube in sequence. In the shaft pushing step, the medium vaporized and expanded by the temperature of the metal tube is fed to the inside of the metal tube to bulge the metal tube along the molding surface of the mold.


Inventors:
SATO KOICHI
MIZUMURA MASAAKI
Application Number:
JP2009166350A
Publication Date:
February 03, 2011
Filing Date:
July 15, 2009
Export Citation:
Click for automatic bibliography generation   Help
Assignee:
NIPPON STEEL CORP
International Classes:
B21D26/033
Domestic Patent References:
JPS44158B1
JP2007075835A2007-03-29
JPH11254052A1999-09-21
JP2003334625A2003-11-25
JP2005324209A2005-11-24
JPS642734A1989-01-06
JPS5499769A1979-08-06
JPS44158B1
JP2007075835A2007-03-29
JPH01228618A1989-09-12
Attorney, Agent or Firm:
Hiroaki Tamura
Tsugeko Shigeo
Yoshiyuki Watanabe
Daisuke Yoshisako