Research on measurement of geometry errors on rotary table
Date Issued
2014
Date
2014
Author(s)
Sun, Wen-Po
Abstract
Rotary axes are widely used in industry, such as in robotic arm, machine tool and coordinate measuring machines (CMM). The cutting of special curved surface, like turbine blade or helical thread, could be performed through multi-axis machine tool. To improve the accuracy of machine tools, it is important to research on the geometry errors of rotary axes. Consequently, how to measure the accuracy of rotary table is essential. There are some measurement systems that had been developed and some systems can reach high resolution.
In this study, several measurement systems have been developed, some can measure tilt error and the others can measure eccentric error. There are three kinds of tilt error measurement systems, one using dial gauge, another using polygon and autocollimator, the other using gauge block and autocollimator. There are two kinds of eccentric error measurement system, one using dial gauge and master ball, another using laser diode, QPD and corner cube as reflector. In the measurement process, some setting errors cause the measurement results unstable. Therefore, it is important to minimize or eliminate setting error. Through the analysis and comparision of measurement results, it can be used to evaluate the reliability of the measurement system, and find out the correlation between linear errors and angle errors of axes. The result can be used as the basis of analyzing the errors of rotary axis in the future.
Subjects
旋轉軸
旋轉台
幾何誤差
量測系統
Type
thesis
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