Base assembly for coordinate measuring machine
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United States of America Patent
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Aug 16, 1988
Grant Date -
N/A
app pub date -
Oct 6, 1987
filing date -
Oct 6, 1987
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A base assembly for a machine tool includes a support arrangement between a metal base and a granite worktable which eliminates distortion caused by differential thermal expansion and contraction and which isolates the base from deformation due to the weight of a workpiece. The support arrangement preferably includes three spaced-apart blocks, each with a V-groove track, attached to the bottom of the granite worktable. The axes of the V-groove tracks intersect at a common point. The metal base includes three spherical projections located for engagement in each of the V-groove tracks. The support arrangement permits the granite worktable and the base to expand, contract and distort separately, while providing vertical support and lateral and rotational restraint. Several configurations of tracks and projections are disclosed.
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