Evaluation of circularity deviation from coordinate measurement data using an improved area hunting method

Manufactured parts generally deviate from their specified dimensions and shape due to approximations involved in machining and uncertainties introduced on account of variations in manufacturing processes. Such deviations are unavoidable and can affect their functionality. Shape deviations are controlled through geometric tolerances that must to be estimated to very high accuracies, since the acceptance or rejection of parts depend on them. A vast majority of engineering parts are cylindrical and hence the evaluation of geometric tolerances relevant to such features becomes more important. Circularity tolerance may be computed using several criteria. This paper presents an improved area hunting method for minimum zone circularity evaluation, a criterion recommended by several standards. The proposed algorithm is compared with some of the existing minimum zone algorithms using coordinate measurement data from literature. The results have been found to be at par or better than those algorithms. (c) 2021 Elsevier Ltd. All rights reserved. Selection and peer-review under responsibility of the scientific committee of the 3rd International Conference on Materials, Manufacturing and Modelling.