Angle Calibration Method

Abstract

The invention discloses an angle calibration method. The position of an angle indexing device is calibrated by combining a multi-tooth indexing table with a polyhedron and cooperating with an autocollimator. Each pre-calibrated position of the angle indexing device corresponds to a pre-calibration For the angle, use the multi-tooth indexing table to calibrate the integer part of the pre-calibrated angle, and use the polyhedron to calibrate the fractional part of the pre-calibrated angle. The present invention realizes the multi-position accuracy calibration of the angle indexing equipment through the combination of the multi-tooth indexing table and the polyhedron and the autocollimator, which makes up for the shortcomings of only using the multi-tooth indexing table or the polyhedron to calibrate the small number of positions. It has low requirements on the environment, high calibration accuracy and simple operation.

Description

technical field [0001] The invention relates to the technical field of precision detection, in particular to a method for calibrating a turntable equiangular indexing device. Background technique [0002] Angle indexing equipment is widely used in many fields such as aerospace, precision manufacturing, and precision testing. Angle indexing accuracy calibration is particularly important for obtaining high-precision angle indexing equipment. Most of the common methods of angle indexing calibration are to use multi-tooth indexing table or polyhedron to cooperate with autocollimator to achieve calibration. When multi-tooth indexing table is used, it can perform angle calibration of 360 points within 360° range, namely Calibration can only be performed for angular divisions at integer-degree positions. When a polyhedron is used for calibration, the number of positions that can be calibrated is the same as the number of faces of the polyhedron, that is, if an icosahedron is used,...

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to overcome the defects of the prior art, in order to solve the problem that the number of calibration positions is small when using multi-tooth indexing table or polyhedron alone, a kind of angle calibration method is proposed, which combines multi-tooth indexing table and polyhedron calibration to increase the number of calibration positions

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