Two-dimension precision transfer equipment, three-dimension precision transfer equipment, and coordinate measuring machine

摘要

A coordinate measuring machine includes a three-dimension precision transfer equipment and a measuring equipment that measures an object. The three-dimension precision transfer equipment includes a movable body, first to third driving bodies, first to third drive mechanisms that drive to move the first to third driving bodies forward and backward in a first direction, a second direction and a vertical direction that are mutually orthogonal, and first to third laser interferometers that detect a displacement of the movable body. The first to third driving bodies include first to third joints that forms a static-pressure clearance between the first to third driving bodies and the movable body. Laser paths of the first to third laser interferometers extend in a manner to respectively penetrate the first to third driving bodies and the first to third joints.

主权项

1. A two-dimension precision transfer equipment comprising:
a base; a movable body that is supported by the base and is movable in mutually orthogonal first and second directions; a hollow tubular first driving body extending in the first direction and a hollow tubular second driving body extending in the second direction, both of which are connected to the movable body; a first drive mechanism that drives to move the first driving body forward and backward in the first direction; a second drive mechanism that drives to move the second driving body forward and backward in the second direction; a first displacement detector that detects a displacement in the first direction of the movable body relative to the base; and a second displacement detector that detects a displacement in the second direction of the movable body relative to the base, wherein: the movable body has a first connection surface extending in the second direction and a second connection surface extending in the first direction, the first driving body has a first joint forming a static-pressure clearance between the first driving body and the first connection surface, the second driving body has a second joint forming a static-pressure clearance between the second driving body and the second connection surface, the first displacement detector is a first laser interferometer having a first laser path that penetrates an interior of the first driving body and extends in the first direction aligned with a moving axis of the first driving body and a thrusting axis of the first drive mechanism, and the second displacement detector is a second laser interferometer having a second laser path that penetrates an interior of the second driving body and extends in the second direction aligned with a moving axis of the second driving body and a thrusting axis of the second drive mechanism.