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Title:
METHOD OF AND APPARATUS FOR FORMING HOLLOW METAL ARTICLE
Document Type and Number:
Japanese Patent JP2011177793
Kind Code:
A
Abstract:

To achieve improved computer control of a forming process, such as a pressure-ram-forming procedure, in a hydroforming operation for a hollow metal article within a die.

The invention provides a method of decreasing cycle time of the forming process, while ensuring acceptable product properties and avoiding failures, by modeling the process using finite element analysis to establish a pressure-time history that optimizes the forming operation and applies failure limits to selected variables such as minimum wall thickness or maximum strain rate, and transferring this pressure-time history to a computer 320 controlling the forming process. Thermocouple and/or continuity sensors are incorporated into the die wall 10 and connected to the computer so as to provide active feedback from the die to the control of the process.


Inventors:
MACEWEN STUART R
SHI YIHAI
HAMSTRA PETER
MALLORY ROBERT WILLIAM
MOULTON JAMES D
Application Number:
JP2011082722A
Publication Date:
September 15, 2011
Filing Date:
April 04, 2011
Export Citation:
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Assignee:
NOVELIS INC
International Classes:
B21D26/033; B21D22/00; B21D26/047; B21D26/049; B21D51/24
Domestic Patent References:
JPH06142781A1994-05-24
JPH09314244A1997-12-09
JPH01210130A1989-08-23
JP2003311343A2003-11-05
JPH06142781A1994-05-24
JPH09314244A1997-12-09
JPH01210130A1989-08-23
JP2003311343A2003-11-05
JP2001259753A2001-09-25
JPS5640825U1981-04-15
Foreign References:
US20030084694A12003-05-08
US20030084694A12003-05-08
WO2002087802A12002-11-07
Attorney, Agent or Firm:
Takuji Yamada
Mitsuo Tanaka
Kawabata Junichi



 
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