DOUBLE ACTING ADJUSTABLE HYDRAULIC PRESS

WIPO Patent Application WO/2005/080070

A1

The present invention discloses a double acting adjustable hydraulic press, specially suitable for the cylindrical gears formed by stamping or expanding, plugging up forging and the metal cold forming or metal hot forming of punching, finishing, flanging and drawing of sheet materials. The press involves four columns, an upper beam, a main slide block, a hold down slide block, a fixing worktable, a floating worktable and a lower beam. The hydraulic chamber of master cylinder fixed in the upper beam communicates to the hydraulic chamber of the auxiliary cylinder, the plunger of master cylinder connects to the main slide block and drives it. The hydraulic chamber of gas/liquid power accumulator fixed in the main slide block communicates to the hydraulic chamber of hold down cylinder, the plunger of hold down cylinder connects to the hold down slide block and drives it. The plunger of ejecting cylinder fixed in the lower beam connects to the floating worktable and drives it.

JPH1080717	HORIZONTAL METAL EXTRUDING PRESS
JPS56139221	DIE EXCHANGING ASSEMBLED BODY FOR EXTRUSION PRESS
WO/1991/000783	CONTINUOUS EXTRUSION APPARATUS

SONG YUQUAN (CN)
WANG MINGHUI (CN)
GUAN XIAOFANG (CN)

PCT/CN2005/000158

September 01, 2005

February 04, 2005

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UNIV JILIN (CN)
SONG YUQUAN (CN)
WANG MINGHUI (CN)
GUAN XIAOFANG (CN)

B21C23/21; B21D22/00; B30B1/32; B30B1/34; (IPC1-7): B30B1/32; B21C23/21; B21D22/00

CN2590684Y	2003-12-10
CN87209840U	1988-04-20
US6520075B1	2003-02-18
US5823104A	1998-10-20
US4571979A	1986-02-25
US4457684A	1984-07-03

NTD PATENT & TRADEMARK AGENCY LIMITED BEIJING OFFICE (Block A Investment Plaza 27 Jinrongdajie, Beijing 2, CN)

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