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Research Papers

3D Simulation of Manufacturing Defects for Tolerance Analysis

[+] Author and Article Information
M. Kamali Nejad, F. Vignat, F. Villeneuve

G-SCOP Laboratory, Université de Grenoble, 38031 Grenoble Cedex 1, France

A. Desrochers

Department of Mechanical Engineering, University of Sherbrooke, Sherbrooke J1K 2R1, Canada

J. Comput. Inf. Sci. Eng 10(2), 021001 (Apr 13, 2010) (13 pages) doi:10.1115/1.3290768 History: Received November 14, 2008; Revised July 17, 2009; Published April 13, 2010; Online April 13, 2010

When a new product is designed in an industrial context, it must be possible to produce this product with the desired level of quality and at an acceptable cost for the market. One of the important quality criteria is compliance with functional tolerances. To evaluate the impact of manufacturing defects on the quality of parts produced, designers simulate the influence of the error stack-up in different machining operations to check compliance with functional tolerances. This paper builds on the model of manufactured part and the Jacobian–Torsor model and presents a combined approach for analyzing machined part tolerance taking into account the geometrical defects occurring in a multistage machining process (positioning defects and machining defects). This combined approach aims to help designers when evaluating the different process plans by predicting the worst quality of finished parts. This study uses interval arithmetic because it offers the advantage of expressing uncertainties and deviations.

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Copyright © 2010 by American Society of Mechanical Engineers
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Figures

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Figure 1

Tolerance stack-up model

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Figure 2

Deviation of a plane

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Figure 3

Manufacturing simulation, the MMP

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Figure 4

Virtual gauge, MMP, and DisGP

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Figure 5

MWP/fixture assembly with a floating link

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Figure 6

Definition of the 3D example

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