Method for providing a toolholder body guide for punch presses
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United States of America Patent
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Dec 7, 1993
Grant Date -
N/A
app pub date -
May 5, 1992
filing date -
May 5, 1992
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A toolholder guide for punch blocks, turrets, and the like, including a toolholder bore machined to accept an internal sleeve of wear resistant metal sized for reciprocal motion of the toolholder. The sleeve is installed compressed within the bore, and provides a close clearing radius with the body of the toolholder, so that the toolholder is accurately centered and guided. The inside of the sleeve is finally machined in compressed condition using a bore-simulating holding mandrel. The finally machined sleeve is shrunk for final installation into the turret bore using liquid nitrogen. The sleeve is adapted for toolholders having bodies with protruding keys or for toolholders with longitudinal keyway slots.
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