Drive system for the jaws of forming presses

(19)

(11)

EP 0 934 782 A3

(12)	EUROPEAN PATENT APPLICATION

(88)	Date of publication A3:
	08.01.2003 Bulletin 2003/02

(43)	Date of publication A2:
	11.08.1999 Bulletin 1999/32

(21)	Application number: 98124307.4

(22)	Date of filing: 21.12.1998

(51)	International Patent Classification (IPC)⁷: B21D 5/02

(84)	Designated Contracting States:
	AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE
	Designated Extension States:
	AL LT LV MK RO SI

(30)

Priority:

28.01.1998 IT MI980155

(71)	Applicant: Tecnostamp Srl
	29100 Piacenza (IT)

(72)	Inventor:
	Cella, Giorgio 29100 Piacenza (IT)

(74)	Representative: Petruzziello, Aldo et al
	Racheli & C. s.r.l. Viale San Michele del Carso, 4 20144 Milano 20144 Milano (IT)

(54)	Drive system for the jaws of forming presses

(57) A drive system for the jaws of forming presses comprising series of pairs of opposed tools, punches (10) and dies (40), shaped according to the forming to be carried out, the punches (10) being clamped, by means of cylindrical actuators (101), to intermediaries (5), in turn clamped to an upper movable table (1) of the press, and the dies (40) being clamped, by means of cylindrical actuators (102), to a supporting bar (41); the cylindrical actuators (101, 102) are controlled during clamping by respective spring means (18, 54) and are hydraulically unclamped through the pressure of oil coming from special ducts made in the respective rear plates (22, 25).

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