NC machine tool
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United States of America Patent
Stats
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Oct 21, 2003
Grant Date -
Dec 26, 2002
app pub date -
Sep 4, 2001
filing date -
Jun 22, 2001
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A NC machine tool having a constitution in which a table (15, 115) for placing a work thereon and a spindle (14, 114) for setting a tool are relatively moved by three feed mechanisms (18-20, 118-120), for X-axis, for Y-axis, and for Z-axis, to carry out machining. A preload is applied to all the three feed mechanisms (18-20, 118-120), for X-axis, for Y-axis, and for Z-axis, using a rack-pinion (21, 22, 24, 25, 27, 28, 121, 122, 124, 125, 127, 128), and using two motors (16, 23, 29) for each axis to prevent backlash in the rack-pinion.
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