Importance

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Abstract

A machine tool precision-measuring apparatus comprising: a first linear movement distance-measuring means 17 including a first slide shaft 11, a first slide bush 13 slidably attached to the first slide shaft 11, and a first distance sensor 15 for measuring a distance that the first slide shaft 11 relatively travels with respect to the first slide bush 13; and, a second linear movement distance-measuring means 18 including a second slide shaft 12 positioned across the first slide shaft 11, a second slide bush 14 connected to the first slide bush 13, the second slide bush 14 being slidably attached to the second slide shaft 12, and a second distance sensor 16 for measuring a distance that the second slide shaft 12 relatively moves with respect to the second slide bush 14. In use of this apparatus, a spindle of a machine tool to be measured is fixed to the first linear movement distance-measuring means 17, while the second linear movement distance-measuring means 18 is fixedly positioned on a base 22, whereby trajectories of the spindle moving in directions of X- and Y-axes are measured. Such a construction provides a machine tool precision-measuring apparatus 10 having a simpler structure, lighter weight, and portability.

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First Claim