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题名:
Improvement of active lap processing in grinding of 1.8m primary mirror
作者: Liu, Haitao1,2; Wu, Fan1; Zeng, Zhige1; Fan, Bin1; Wan, Yongjian1; Zhang, Yong1; Xian, Linhan1
出版日期: 2014
会议名称: Proceedings of SPIE: 7th International Symposium on Advanced Optical Manufacturing and Testing Technologies: Large Mirrors and Telescopes
会议日期: 2014
学科分类: Finite element method - Grinding (machining) - Lapping machines - Manufacture - Mirrors - Optical testing - Telescopes
DOI: 10.1117/12.2068096
中文摘要: The computer controlled active lap (CCAL) is used to grind a 1.8m honeycomb primary mirror. One problem which is not totally solved by CCAL is the edge effect, also exists in many other fabricating methods. To reduce the CCAL edge effect, the pressure distribution on the contact face between lap and mirror is analyzed by finite element method (FEM). A new method is proposed to calculate the pressure curve from FEM results. A simplified model is used to approximate the pressure curve along the mirror radius when active lap covers the mirror center hole. The const-linear (C-L) model is used to describe the pressure curve when active lap overhang at the mirror out edge. The contact status between lap and mirror is also considered in this paper, and its influence is taken into the material removal rate calculation. The API's T3 laser tracker is used to measure the mirror surface shape and to check the correctness of the theoretical model. The results that we have got by now and the problems that still exist are reported in this paper. © 2014 SPIE.
英文摘要: The computer controlled active lap (CCAL) is used to grind a 1.8m honeycomb primary mirror. One problem which is not totally solved by CCAL is the edge effect, also exists in many other fabricating methods. To reduce the CCAL edge effect, the pressure distribution on the contact face between lap and mirror is analyzed by finite element method (FEM). A new method is proposed to calculate the pressure curve from FEM results. A simplified model is used to approximate the pressure curve along the mirror radius when active lap covers the mirror center hole. The const-linear (C-L) model is used to describe the pressure curve when active lap overhang at the mirror out edge. The contact status between lap and mirror is also considered in this paper, and its influence is taken into the material removal rate calculation. The API's T3 laser tracker is used to measure the mirror surface shape and to check the correctness of the theoretical model. The results that we have got by now and the problems that still exist are reported in this paper. © 2014 SPIE.
收录类别: Ei
语种: 英语
卷号: 9280
ISSN号: 0277786X
文章类型: 会议论文
页码: 92800Z
Citation statistics:
内容类型: 会议论文
URI标识: http://ir.ioe.ac.cn/handle/181551/7612
Appears in Collections:先光中心_会议论文

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作者单位: 1. Institute of Optics and Electronics, Chinese Academy of Sciences, Chengdu, China
2. University of Chinese Academy of Sciences, Beijing, China

Recommended Citation:
Liu, Haitao,Wu, Fan,Zeng, Zhige,et al. Improvement of active lap processing in grinding of 1.8m primary mirror[C]. 见:Proceedings of SPIE: 7th International Symposium on Advanced Optical Manufacturing and Testing Technologies: Large Mirrors and Telescopes. 2014.
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