Device in a bending unit
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United States of America Patent
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Jan 27, 1998
Grant Date -
N/A
app pub date -
Sep 16, 1996
filing date -
Mar 23, 1994
priority date (Note) -
Expired
status (Latency Note)
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Abstract
An arrangement for a bending unit for bending in a projecting edge flange (4) against a surface of a workpiece (3). The bending unit comprises a stand (1), supporting a drive unit, and a supporting surface for the workpiece, as well as a link system (7, 8), which in turn supports a tool holder (6) for a bending tool (5), which is displaceable along a predetermined path of movement between a starting position and a final position. The drive unit comprises a motor (17), which is coupled to a crankshaft (15). A toggle joint (17, 19) in the form of two links is joined, firstly, to a crank pin (16) rotatable with the crankshaft (15), and, secondly, to a fixed pivot point (9) in the stand (1). A drive link (21) is articulated, on the one hand, to a link (19) in the toggle joint, and, on the other hand, to the tool holder (6). The toggle joint is also provided with elements (24, 25) for buckling ut from the extended alignment position in either direction, depending on the rotational direction of the crankshaft (15).
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