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Proceedings Paper

Study on the distortion prediction of focal plate
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Paper Abstract

The focal plate is one of the most important components of the LAMOST, whose shape precision to be centripetal and spherical structure of multi-hole. The hole drilling distortion duing to residual stress becomes one of the striking problems. Studying on the distortion prediction, this paper adopts the finite element simulation based on the metal cutting principles. The distribution to the surface residual stress is achieved by building the FEM model using ANSYS .The influence of cutting depths on the distortion of the focal plate was investigated. With the confirmation of the final CMM test result, the deviation which compared the measuring point with the theoretical sphere is less than 0.066mm. The result showed that the FEM analysis is an effective method which predicts the machining distortion of the focal plate.

Paper Details

Date Published: 1 October 2009
PDF: 10 pages
Proc. SPIE 7427, Optical Modeling and Performance Predictions IV, 74270K (1 October 2009); doi: 10.1117/12.826590
Show Author Affiliations
Jianping Wang, Univ. of Science and Technology of China (China)
Jiaru Chu, Univ. of Science and Technology of China (China)
Hongzhuan Hu, Univ. of Science and Technology of China (China)
Xiaofeng Li, Univ. of Science and Technology of China (China)
Zengxiang Zhou, Univ. of Science and Technology of China (China)


Published in SPIE Proceedings Vol. 7427:
Optical Modeling and Performance Predictions IV
Mark A. Kahan, Editor(s)

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