Blanking press
AssigneeFeintool International Holding AG
InventorsJohannes Haack, Hans Wymann
Life of this patent
Estimating the term…
Abstract
A precision blanking tool mounted in a press, which may be a transfer press, comprises an upper part with an upper tool support and a lower part with a lower tool support. One hydraulic unit is accommodated in the upper part of the precision blanking tool and another in the lower part. The upper hydraulic unit is inserted with the upper tool support in an interchangeable frame and the lower hydraulic unit with the lower tool support in another frame. The hydraulic units are controlled with pressurized oil by drive means forming a separate unit.
Claims7
A press for machining of sheet-metal workpieces or of cast or forged blanks, comprising:
- a fixed table and a ram arranged for effecting stroke movements with respect to said table;
- a set of stations arranged relative to said table and said ram;
- one of said stations including a fine-blanking tool assembly;
- said tool assembly including a first tool support associated with said ram, a plurality of first tool parts associated with said first tool support;
- said tool assembly including a second tool support associated with said table, a plurality of second tool parts associated with said second tool support;
- said first tool support including a plurality of first hydraulic units;
- said second tool support including a plurality of second hydraulic units;
- each of said first and second hydraulic units of said first and second tool supports including a cylinder, a piston capable of reciprocal movements relative to its associated cylinder, and means for transmitting movements from each said piston to an associated one of said first and second tool parts;
- and
- a control device for said first and second hydraulic units of said first and second tool supports, said control device including means for independently and selectively driving the pistons within their associated cylinders during a course of a stroke movement of said ram to effect a plurality of fine-blanking operations within said tool assembly during said stroke movement.
A fine-blanking tool assembly for mounting in a press having a fixed table and an associated movable ram to effect a plurality of fine-blanking operations on a sheet-metal workpiece or a cast or forged blank during a stroke movement of said ram with respect to said table, said tool assembly comprising:
- a first tool support integral with one of said ram and table, a plurality of first tool parts associated with said first tool support;
- a second tool support integral with the other one of said ram and table, a plurality of second tool parts associated with said second tool support;
- first hydraulic units associated with said first tool support;
- second hydraulic units associated with said second tool support;
- each of said first and second hydraulic units including a cylinder integral with an associated one of said first and second tool supports, a piston capable of reciprocal movements within its associated cylinder, and transmission means for transmitting movements from each said piston to an associated one of said first and second tool parts;
- and
- a control device including driving means for independently and selectively driving said pistons within their associated cylinders during a course of said stroke movement of said ram.
Dependencies are inferred from the claim text.