Paper Title:
Study on the Dimensional Precision of the Polymer SLS Prototype
  Abstract

Selective Laser Sintering (SLS) has many advantages such as fast building speed, wide range of materials, complicate shape of prototype and simple post-treatment. However, the shrinkage and mechanical stresses result in lost of the accuracy. This paper investigates the dimension precision of polymer SLS prototypes and proposes methods to control dimensions in suitable degree. The influencing factors of dimensional precision in the file preparation of CAD model, manufacturing system of SLS prototype and sintering process are analyzed. It indicates that the sintering shrinkage in sintering process is the main reason of dimensional changes. To improve the dimensional precision, the measures are proposed to diminish the shrinkage: improving material of prototype, optimizing the sintering process and compensating the lost of dimension. After analysis the experimental results, the rule of error changes is summarized by fitting equations and feedback to controlling software of SLS system to improve the dimensional precision effectively. The SLS prototype could be controlled in 100±0.20mm through compensation.

  Info
Periodical
Key Engineering Materials (Volumes 291-292)
Edited by
Yury M. Baron, Jun'ichi Tamaki and Tsunemoto Kuriyagawa
Pages
597-602
DOI
10.4028/www.scientific.net/KEM.291-292.597
Citation
H.J. Liu, Y.M. Li, Y. Hao, N.Y. Huang, Y. S. Shi, "Study on the Dimensional Precision of the Polymer SLS Prototype", Key Engineering Materials, Vols. 291-292, pp. 597-602, 2005
Online since
August 2005
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$32.00
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