Abstract
In this paper, a computer-aided error modeling approach for enhancing the accuracy and the effectiveness of the turning process is discussed. Rigid body kinematics is used to derive error models that correlate the resultant errors in the machine tool workspace to the imperfection and misalignment of positioning elements and workpieces. Using the proposed error modeling technique, the machine tool is capable of fulfilling the major aim of any machining process to produce workpieces within the imposed tolerances of form, dimension, surface finish and quality. The effectiveness of the proposed error modeling approach has been further increased by a computer-aided searching algorithm to identify the robust measuring points with respect to the designated tolerance. For arbitrarily shaped manufacturing parts, the identified measuring points are least sensitive to the potential measuring errors in parameter estimation. The effectiveness of the proposed error modeling approach is demonstrated by simulation results.
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