Machine tool clamping device
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
-
Sep 11, 2001
Grant Date -
N/A
app pub date -
Dec 2, 1998
filing date -
Apr 3, 1997
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A machine tool tool changing device including a circular array of multiple collet fingers (5) housed in the shaft hole (12) of a spindle (1) capable of turning between a clamped position in which a tool holder (2) knob (22) is clamped and an unclamped position in which the knob is released, a collet sleeve (6) which surrounds the circular array of collet fingers and arrests the turning of same, an air cylinder which moves the collet sleeve axially relative to the collet fingers and releases the arresting of the collet fingers, a first plate spring (43) which exerts a strong force on the knob toward the spindle through the collet fingers, an air cylinder which removes the force exerted by the first plate spring, and a second plate spring (46) which exerts a force to maintain the collet fingers in the clamped position in opposition to the weight of the tool holder even if the collet fingers rotate and the force exerted by the first plate spring is removed.
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