Machine tool and machining method
Number of patents in Portfolio can not be more than 2000
United States of America Patent
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Oct 11, 2016
Grant Date -
Jul 24, 2014
app pub date -
Aug 29, 2012
filing date -
Aug 31, 2011
priority date (Note) -
In Force
status (Latency Note)
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Abstract
A machine tool includes a main spindle (10) which holds a workpiece (200, object to be machined) and is rotatable about the shaft center (C1), a main spindle motor (20, main spindle driver) which rotates the main spindle (10), a rotary guide bush (30, eccentric guide bush) which supports the workpiece (200) projecting from a leading end of the main spindle (10) to be rotatable in a state of being eccentric relative to the shaft center (C1) by a length E, a guide bush servomotor (40, guide bush driver) which rotates the rotary guide bush (30) about the shaft center (C1) in synchronization with the main spindle (10), and a controller (50) which controls the rotation and driving of the guide bush servomotor (40), so as to selectively switch between the rotation state and the stop state of the rotation.
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