真円度測定における精度と測定点数の関係

概要

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It is important to clarify the difference between the true shape of the workpiece and the shape estimated from the chain of measured points, in the three-coordinate measuring machines. In this paper, the roundness was dealt, first of all. Using "min-max method", the evaluation program was made based on the minimum zone conception. Then the roundness was numerically calculated changing the phase of the starting point of the measurement and the sampling interval (number of measured points). As a result, some, remarkable facts have been clarified as follows. The decrease of the un-certainty of the calculated roundness, according to the number of measured points. The lower uncer-tainty less than intended value, as selection of the number of measured points, in the ca e where the shape was made only from the highest order of frequency component. Namely, the number of mea-sured points N is given as N=2.2M/√G, where M is the highest order of frequency component, and G is the uncertainty,
公益社団法人精密工学会の論文
1984-12-05