B - Operations – Transporting – 30 – B
Patent
B - Operations, Transporting
30
B
B30B 1/26 (2006.01) B30B 15/14 (2006.01)
Patent
CA 2705649
The invention relates to a mechanical press for fine blanking, forming and/or stamping of work pieces having a machine frame (2) assembled of a head piece (39) and an O-shaped frame (29), a suspendedly fixed to the head piece projecting into the O-piece fine blanking or forming head with a fixed to it upper tool part, a in the O-shaped frame (29) vertically guided on a stroke axis (HU) ram (3) provided with a table top (21) for fixing a lower tool part and a positioned below the ram (3) toggle mechanism without a flywheel. The invention has the task to provide a mechanical press working without a flywheel in a broad range of nominal force of pressure, significantly enhances the rigidity of the toggle mechanism at the upper dead point, reduces the massiveness of the machine frame and works with a significantly reduced driving power despite of the abolished flywheel. This task is solved that way, that a connecting rod (8) having a nearly equilateral effective triangle has two above each other positioned articulation points (22; 23) of which the lower articulation point (23) via a plate-like designed lower articulated arm (26) swivels around a positioned with its base at the O-shaped frame (29) fixed bearing (FL1) and the allocated to the ram (3) upper articulation point (25) with the lower plate- like designed articulated arm (24) in the upper dead point (OT) reach an effective length with regard to the stroke axis (HU), wherein the fixed bearing (FL2) lies on the stroke axis (HU) of the ram (3) and the connecting rod (8) are allocated two eccentric shafts (6) in fixed bearings (FL1) the axes of which are aligned, the averted shaft ends (36) of which are connected to three-phase synchronous motors (34; 35) without flywheels for driving them paralelly and simultaneously via one epicyclic gear (37) for each respectively, wherein the motors are adjustable to equal among one another path-time characteristics by means of a computer (38) connected to the motors (34; 35).
Cristofaro Alfio
Hueppi Lukas
Ochsenbein Juerg
Schaltegger Markus
Feintool Intellectual Property Ag
Riches Mckenzie & Herbert Llp
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