HYDRAULIC FORMING METHOD FOR LAMINATED PLATE AND APPARATUS THEREFOR

Japanese Patent JP2008302404

A

To provide a hydraulic forming method for a laminated plate and an apparatus therefor where, even in a preform having a hollow part, the reduction of the plate thickness in a flange part after forming does not occur.

In a state where a movable pad part 27 advancing and retreating with respect to a preform 10 in a cavity 23 is projected into the cavity 23, the preform 10 is abutted against the inner face of the movable pad part 27, so as to form a top wall Pa, further, the other part of the preform 10 is abutted against the inside face of the cavity 23 along thereto, so as to form a side wall Pb, liquid pressure is injected while gradually retreating the movable pad part 27, thus the side wall Pb is expanded while causing friction resistance between the side wall Pb and the inside face 23a of the cavity 23, the inflow of the material from a flange part F is suppressed, and then, forming is performed.

WO/2001/010580	METHOD FOR SHAPING AN INITIAL PROFILE OR A SIMILAR WORKPIECE USING AN INTERNAL HIGH PRESSURE AND PROFILE THEREFOR
WO/2004/022257	METHOD AND DEVICE FOR JOINING A PLANAR COMPONENT TO A HOLLOW SECTION
JP2001212628	HYDRO-FORM FORMING METHOD

WATARI TOMOAKI
KAWAUCHI NORIAKI

JP2007153245A

December 18, 2008

June 08, 2007

Click for automatic bibliography generation  

NISSAN MOTOR

B21D26/02; B21D26/021; B21D26/031

JPH07155857A	1995-06-20
JP2003211232A	2003-07-29

Mikio Hatta
Yasuo Nara
Katsuyuki Utani
Ken Fujita
Masanori
Toshihiro Hasegawa

Previous Patent: METHOD FOR PRODUCING INNER RING AND OUTER RING OF ROLLING BEARING

Next Patent: SHAPING CONDITION DECIDING SYSTEM