DROP FORGING METHOD AND FORGING DEVICE FOR CARRYING OUT SAID METHOD

WIPO Patent Application WO2005053874

A3

The invention relates a drop forging method by means of a forging device (1) provided with a hammer and a forging die (9), wherein a part (T) placed in the forging die (9) is shaped with a hammer blow, several engravings (a, b, c, d) are formed in the die (9), a blank (R) is initially inserted into the first engraving (a) and said blank is moved along the other engravings (b, c, d) to the last engraving (e), and then said blank picked up during shaping by a forging gripper. In order to obtain an optimum operating mode, the invention is characterised in that the part (T) is received in a plurality of engravings (a, b, c, d) with each hammer blow. In order to obtain a symmetrical distribution of the hammer load between occupied and non-occupied engravings, the parts (T) are gripped respectively during shaping by the forging grippers. After each hammer blow, a successive displacement of the parts (T) is carried out in the other engravings by removing the part (T) from the last engraving (e) or from the last but one by an engraving occupied by a part and a blank (R) is inserted in the first engraving (a) to be occupied.

JPS61226132	ROTARY FORGING MACHINE WITH EXTERNAL SHAPE FORMING ROLL
JPS60223700	OPPOSED TYPE PRESS

LORBACH WOLFGANG (DE)

PCT/EP2004/053189

October 13, 2005

December 01, 2004

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PUTSCH GUSTAV C KG KNIPEX WERK (DE)
LORBACH WOLFGANG (DE)

B21J9/02; B21J13/08; (IPC1-7): B21J9/02; B21J13/08

US1996819A	1935-04-09
DE19958846A1	2001-06-13
DE20311306U1	2003-10-02
DE3129482A1	1983-02-10

PATENT ABSTRACTS OF JAPAN vol. 014, no. 013 (M - 918) 11 January 1990 (1990-01-11)
See also references of EP 1689542A2

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