Workpiece clamp with two alternately applicable compression rings
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United States of America Patent
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Issued Date -
Feb 17, 2005
app pub date -
Mar 30, 2004
filing date -
Feb 22, 2002
priority date (Note) -
Abandoned
status (Latency Note)
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Abstract
A workpiece clamp (1) for a machine tool that drills at high speeds is provided with two compression rings (2, 3) with holes (2f, 3f) of different diameters for the passage of drilling tools of different diameters. The rings are mounted on the clamp, symmetrically and on opposite sides of the drilling axis (Z-Z) in such a way that they are able to rotate about the horizontal axes of two pinions (4, 5) meshing with a rack (6) that is moved in both directions relative to a central point (P) through a stroke (C) by a double-acting pneumatic piston (7). The form, dimensions and positions of the rings are such that, in response to the rotation of their respective pinions only one, alternatively, of the said rings is placed in the working position, with the axis of its hole coincident with the drilling axis (Z-Z); the other ring being laterally displaced where it does not interfere with the drilling axis (Z-Z).
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