Abstract
ISO TC10/SC5-1986 TR has proposed some verification methods of the related features such as positional tolerance, parallelism and coaxiality of cylindrical parts. As most of these proposed methods are performed by using some simple measuring tools, the reliability of verified values may be too low for high precision parts. In this paper, the authors develop the technique to verify the accuracy of related features for eccentric crank shaft by software. In this technique, the position and the orientation of eccentric cylinder axis of crank shaft are obtained by processing the form data of cylinders which are measured by the instrument for measurement of radius variation from rotating table center without the operation of centering.
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