EP 0297475 A3 19900627 - PLATE DRAWING APPARATUS
Title (en)
PLATE DRAWING APPARATUS
Publication
Application
Priority
IT 2111287 A 19870630
Abstract (en)
[origin: EP0297475A2] The present invention relates to a plate drawing apparatus comprising: a) a supporting structure formed by a punch-holder part and by an opposite part, connected by at least two, preferably four, tension elements; b) a punch supported by said punch-holder part and adapted to engage and disengage a corresponding die, the coupling between said punch and said die determining the shape of the drawing of said plate; c) an abutment body supporting said die and slideable along said tension elements for a stroke at least corresponding to the depth of the drawing to be obtained on said plate. The abutment body is formed by a first element supporting said die and by a second element; said first and said second element being mutually coupled by means of a plurality of short-stroke pistons supported by one of said elements; said second element being lockable in working position by virtue of mechanical locking means; the working pressure required for drawing being obtained by means of the action of said plurality of short-stroke pistons; the sliding of said abutment body required for the extraction of the drawn part being obtained by means of the release of said mechanical locking means.
IPC 1-7
IPC 8 full level
B21D 22/22 (2006.01); B21D 24/08 (2006.01)
CPC (source: EP)
B21D 22/22 (2013.01); B21D 24/08 (2013.01)
Citation (search report)
- [Y] CH 383777 A 19641031 - TRIULZI S A S NOVATE A [IT]
- [Y] US 2718663 A 19550927 - ROGER ALBERT J
- [A] DE 3404307 A1 19850814 - OPEL ADAM AG [DE]
- [A] FR 2141615 A1 19730126 - MORAULT GABRIEL
Designated contracting state (EPC)
BE DE ES FR GB NL SE
DOCDB simple family (publication)
EP 0297475 A2 19890104; EP 0297475 A3 19900627; EP 0297475 B1 19921125; DE 3876152 D1 19930107; DE 3876152 T2 19930415; ES 2035888 T3 19930501; IT 1217320 B 19900322; IT 8721112 A0 19870630
DOCDB simple family (application)
EP 88110182 A 19880625; DE 3876152 T 19880625; ES 88110182 T 19880625; IT 2111287 A 19870630