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Multi‐objective optimization of part‐ building orientation in stereolithography

W. Cheng (Department of Mechanical and Production Engineering, National University of Singapore, Singapore)
J.Y.H. Fuh (Department of Mechanical and Production Engineering, National University of Singapore, Singapore)
A.Y.C. Nee (Department of Mechanical and Production Engineering, National University of Singapore, Singapore)
Y.S. Wong (Department of Mechanical and Production Engineering, National University of Singapore, Singapore)
H.T. Loh (Department of Mechanical and Production Engineering, National University of Singapore, Singapore)
T. Miyazawa (Sony Precision Engineering Centre (SPEC), Singapore)

Rapid Prototyping Journal

ISSN: 1355-2546

Article publication date: 1 December 1995

Abstract

In rapid prototyping, such as SLA (stereolithography apparatus) and FDM (fused deposition modelling), the orientation of the part during fabrication is critical as it can affect part accuracy, reduce the production time, and minimize the requirement for supports and, thus, the cost of building the model. Presents a multi‐objective approach for determining the optimal part‐building orientation. Considers different objectives such as part accuracy and building time. Objective functions have been developed based on known sources of errors affecting part accuracy and the requirements of good orientations during the building of a model. The objective functions employ weights assigned to various surface types affecting part accuracy. The primary objective is to attain the specified accuracy achievable with the process. The secondary objective is to minimize the building time. Gives examples to illustrate the algorithm for deriving the optimal orientation which can assure better part quality and higher building efficiency.

Keywords

Citation

Cheng, W., Fuh, J.Y.H., Nee, A.Y.C., Wong, Y.S., Loh, H.T. and Miyazawa, T. (1995), "Multi‐objective optimization of part‐ building orientation in stereolithography", Rapid Prototyping Journal, Vol. 1 No. 4, pp. 12-23. https://doi.org/10.1108/13552549510104429

Publisher

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MCB UP Ltd

Copyright © 1995, MCB UP Limited