MACHINE TOOL
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United States of America Patent
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app pub date -
Mar 9, 2016
filing date -
Mar 17, 2015
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Abstract
A machine tool of the present embodiment includes: a column that is disposed in a vertically standing manner and has a predetermined linear expansion coefficient; a spindle head that is supported by the column and supports a horizontal spindle for attaching a tool thereto; and a reference bar that is disposed separately from the column and has a linear expansion coefficient that is different from the linear expansion coefficient of the column wherein the column has a column-side measurement target zone, the reference bar has a reference bar-side measurement target zone, and a measurement means measures a distance between the column-side measurement target zone and the reference bar-side measurement target zone.
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