In addition many cmm manufacturers implement their

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Unformatted text preview: tion A. Barari*, H. A. ElMaraghy**, G. K. Knopf* * Department of Mechanical & Materials Engineering, University of Western Ontario, London, Ontario, Canada, N6A 5B9 ** Industrial and Manufacturing Systems Engineering, University of Windsor, Windsor, Ontario, Canada, N9B 3P4 Corresponding Author: [email protected] Abstract: The number and location of samples acquired during coordinate measurement are among the most important parameters that affect the accuracy of evaluating the actual geometric deviations and comparing them with tolerance specifications. A method based on iterative sampling of discrete 3D points is presented for evaluating actual geometry deviations of machined sculptured surfaces and for assisting the important accept/reject decisions making process. The strategy relies on estimating the density function of the geometric deviations between the actual and substitute surfaces, using the Parzen windows technique. The computed error density function is used to identify portions of the surface that require further iterative sampling of measurement points until the desired accuracy is achieved. This method may be used for assessing any geometry deviations due to systematic or non-systematic error sources. No prior assu...
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This note was uploaded on 08/03/2010 for the course DD 1234 taught by Professor Zczxc during the Spring '10 term at Magnolia Bible.

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