Press drive
AssigneeBruderer AG
InventorWaldemar Hellwig
Life of this patent
Estimating the term…
Abstract
To drive two toggle lever (29,29') of a press, in particular a high frequency cutting press with at least 400 strokes per minute, two separate but mutually synchronized drives (101,101') are provided to ensure a uniform, non-wobbling motion of the tool carrier (5). The drives (101, 101') can be rotary or linear drives and are used to drive the toggle levers (29, 29') during at least part of their motion. The energy storage (200) ensures a low energy consumption, since it stores the braking energy and supplies it again to the drive during acceleration.
Claims29
A press drive for two tool supports which are displaceable relative to one another, at least one of which is driven by means of at least two toggle levers, each having two dead center positions,
- each of said toggle levers being driven and braked by at least one respective drive energy source by means of at least one respective connecting rod,
- at least one dead center position of the toggle levers corresponding to the closest approach to each other of said tool supports which are displaceable relative to one another,
- the toggle levers having knee joints which bend symmetrically in opposite directions, and the drive energy sources being synchronized with one another via a synchronizing arrangement,
- wherein each of the drive energy sources comprises an energy store of the non-flywheel type, the energy store being adapted to release stored energy when driving said toggle levers in order to accelerate the tool supports, and to store braking energy when braking said toggle levers during braking of the tool supports.
A press drive for two tool supports which are displaceable relative to one another, at least one of which is driven by means of at least two toggle levers, each having two dead center positions,
- each of said toggle levers being driven and braked by at least one respective drive energy source by means of at least one respective connecting rod,
- at least one dead center position of the toggle levers corresponding to the closest approach to each other of said tool supports which are displaceable relative to one another,
- the toggle levers having knee joints which bend symmetrically in opposite directions, and the drive energy sources being synchronized with one another via a synchronizing arrangement,
- wherein each of the drive energy sources comprises a reciprocating drive and an energy store, the energy store being adapted to release stored energy when driving said toggle levers in order to accelerate the tool supports, and to store braking energy when braking said toggle levers during braking of the tool supports.
Dependencies are inferred from the claim text.