Aligning and levelling device for rotating platform of ultra-precise measuring machine

Abstract

The invention discloses an aligning and levelling device for a rotating platform of an ultra-precise measuring machine, which comprises a lower static-pressure disc of the rotating platform, a plurality of levelling devices, an aligning device and a universal levelling plate. The top of the lower static-pressure disc of the rotating platform is provide with a concave spherical surface and a plurality of grooves distributed symmetrically; the lower part of the universal levelling plate is provided with a convex spherical surface; the universal levelling plate is arranged on the top of the lower static-pressure disc of the rotating platform; the convex spherical surface of the universal levelling plate is matched with the concave spherical surface of the lower static-pressure disc of the rotating platform; and the lower mounting surface of the rotating platform is arranged on the universal levelling plate directly. The aligning and levelling device can be used for the large-diameter part measuring rotating platform; the spherical surfaces of the aligning and levelling device match with each other and have the advantages of large contact area, easy aligning, stable movement and strong bearing capacity; and the two spherical surfaces grind mutually when a spherical surface contact pair is used, have a good contact area and self-repairing functions and can improve the adjustment precision, the stability and the reliability of the aligning and levelling device.

Description

technical field [0001] The invention belongs to the technical field of precision measurement, in particular to a self-aligning and leveling device for a turntable of an ultra-precision measuring machine. Background technique [0002] Turntable is one of the key components of ultra-precision measuring instruments, and its accuracy directly affects the accuracy of measuring instruments. At present, domestic high-precision turntables generally use manual self-aligning and leveling devices. Internationally, the high-precision turntables of British Taylor Company use automatic self-aligning and leveling devices, but their structures are complex and expensive. At present, the size of the precision turntable manually adjusted in China is small, which cannot meet the precision measurement of large-diameter parts (diameter greater than 500mm). Contents of the invention [0003] The object of the present invention is to provide a self-aligning and leveling device for the turntable ...

AI Technical Summary

Problems solved by technology

At present, domestic high-precision turntables generally use manual self-aligning and leveling devices. Internationally, the high-precision turntables of British Taylor Company use automatic self-aligning and leveling devices, but their structures are complex and expensive.

At present, the size of the precision turntable manually adjusted in China is small, which cannot meet the accuracy measurement of large-diameter parts (diameter greater than 500mm)

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