Press with cutting shock dampening
AssigneeSchuler Pressen GmbH
InventorJuergen Fahrenbach
Life of this patent
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Abstract
To increase the cutting quality and to improve the operation of a press, in particular in punching high-strength martensitic materials or when punching thick sheet metal, a sheet metal holding device is provided for securely clamping the respective workpiece during the punching operation. The clamping force is increased to 40% or more of the ram force. The force exerted by the sheet metal holding device during the penetration of the workpiece can be further increased. The increase in the clamping force preferably takes place in a controlled manner as a function of the press angle.
Claims21
Press, such as a press for punching sheet metal, comprising a press frame having a press bed for holding a lower die and a movably-mounted ram operatively connected to a drive device and carrying an upper die,
- a controllable supporting device set up for generating a variable force that is effective between the ram and the press bed, and
- a control unit operatively associated with the supporting device to detect via a sensor device a quantity that has a unique correlation with ram position and that influences a force exerted by the supporting device and acting between the ram and the workpiece as a function of the quantity.
Method for punching sheet metal using a press having a press frame including a press bed for accommodating a lower die and a ram movable in a working direction, said lower die being operatively connected to a drive device and having an upper die, a controllable supporting device configured to press at least temporarily against the ram opposite the working direction, and a control unit operatively associated with the supporting device
- comprising varying a force applied by the supporting device as a function of a quantity having a unique relationship to the position of the ram.
Dependencies are inferred from the claim text.