Apparatus and method for accurate countersinking and rivet shaving for mechanical assembly operations
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United States of America Patent
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Apr 22, 2003
Grant Date -
Aug 8, 2002
app pub date -
Feb 2, 2001
filing date -
Feb 2, 2001
priority date (Note) -
Expired
status (Latency Note)
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Abstract
The apparatus and method includes a spindle portion which holds a cutting tool. The drill is initially moved forwardly of a pressure foot portion of the apparatus. The pressure foot portion is then moved forwardly along with the spindle and drill to clamp the mechanical assembly. A thrust control arrangement produces a reduction of the thrust on the tool holder such that as the assembly is being clamped, the tool initially contacts the workpiece and then remains stationary while the pressure foot moves forward to complete clamp-up. The positions of the tip of the tool and the surface of the workpiece are recorded and compensation is then made to the apex position of the spindle stroke, using a previously determined reference position of the tool relative to the workpiece.
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