Electric heating – Metal heating – Work holders
Patent
1989-06-28
1990-11-27
Leung, Philip H.
Electric heating
Metal heating
Work holders
269268, 269287, B23K 923
Patent
active
049738232
ABSTRACT:
A clamping device for holding cylindrical workpieces having a nominal radius R which varies from a minimum of (R-A) to a maximum of (R+B), where A and B are the limits of the tolerance range for the nominal radius, includes opposed clamp halves each having a clamp face adapted to be moved toward and away from one another and each of the clamp halves carrying a rigid collet element adapted to engage on opposite sides of cylindrical workpieces when the clamp halves are moved toward one another. Each of the collet elements has a semi-cylindrical clamping surface extending inwardly from the clamp face of the respective clamp half. Each semi-cylindrical clamping surface has a radius substantially equal to (R+B) with the center of the radius being offset outwardly of the clamp face of the respective clamp half an amount at least equal to (A+B). Preferably, the center of the radius is offset an amount at least equal to (A+B+C), where C is the tolerance deviation permitted to the radius (R+C). Additionally, each clamping surface is comprised of individual surface portions mounted for independent flexing movement to allow the collet to further compensate for workpiece tolerance variations.
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Benway Ernest A.
Gardner Thomas J.
Cajon Company
Leung Philip H.
Osborn David
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