Metal deforming – By application of fluent medium – or energy field – With actuated tool engaging work
Patent
1997-05-22
1998-04-07
Jones, David
Metal deforming
By application of fluent medium, or energy field
With actuated tool engaging work
72 58, 294211, B21D 2602
Patent
active
057351562
ABSTRACT:
A method of forming a non-circular pipe having a different sectional shape in the longitudinal direction thereof by bending a raw pipe while applying pressure to the inside of the raw pipe, wherein the circumference of a section of the raw pipe is substantially equalized to the circumference of a section, corresponding to the section of the raw pipe, of the non-circular pipe after formed.
REFERENCES:
patent: 1984002 (1934-12-01), Ward
patent: 5445001 (1995-08-01), Snavely
Japanese Patent Unexamined Publication No. 55-77934 Date Jun. 1980.
Japanese Patent Uenxamined Publication No. 55-55819 Date Apr. 1980.
Araya Takeshi
Iwakura Shota
Nakazaki Takamitsu
Sato Toshimi
Tanaka Shinji
Hitachi , Ltd.
Jones David
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