Study on sensitivity of surface deviation for aspheric mirror blank on centrifugal melting casting

doi:10.3788/OPE.20182607.1719

CIOMP OpenIR

	Study on sensitivity of surface deviation for aspheric mirror blank on centrifugal melting casting
	Zhang, Xin-Ming; Xu, Xin-Li; Cai, Peng; Yu, Yang; Zhao, Li-Xin
	2018
发表期刊	Guangxue Jingmi Gongcheng/Optics and Precision Engineering
ISSN	1004924X
卷号	26 期号:7 页码:1719-1727
摘要	Centrifugal melting casting technology has unique advantages in the manufacture of large aspheric mirror blanks. In this paper, the centrifugal casting process and the quality of the mold embryo were studied in depth by using a self-developed shrinkage model experiment machine. In order to obtain the required mirror blank, the processes of preparing the coating, heating, cooling and preserving the heat of the mold were introduced in detail. The influencing factors of shape deviation in the mirror blank production were studied by comparing simulation values with experimental results. The influence of the coefficient of thermal expansion, cooling rate, diameter, and heating temperature on the surface deviation was analyzed, and a mathematical expression relating these parameters to the deviation was derived. The compensation of the deviation was then calculated in two iterations, thus reducing the surface deviation from 84 to 33 m. The compensation results met the design requirements. Using centrifugal casting technology, the aspheric mirror embryo can be prepared to meet the vertical deviation specifications of its upper surface in the range of 30~40 m. 2018, Science Press. All right reserved.
关键词	Mirrors Aspherics Centrifugal casting Centrifugation Compensation (personnel) Melting Molds Processing Shrinkage Thermal expansion
DOI	10.3788/OPE.20182607.1719
收录类别	EI
引用统计
文献类型	期刊论文
条目标识符	http://ir.ciomp.ac.cn/handle/181722/60824
专题	中国科学院长春光学精密机械与物理研究所
推荐引用方式 GB/T 7714	Zhang, Xin-Ming,Xu, Xin-Li,Cai, Peng,et al. Study on sensitivity of surface deviation for aspheric mirror blank on centrifugal melting casting[J]. Guangxue Jingmi Gongcheng/Optics and Precision Engineering,2018,26(7):1719-1727.
APA	Zhang, Xin-Ming,Xu, Xin-Li,Cai, Peng,Yu, Yang,&Zhao, Li-Xin.(2018).Study on sensitivity of surface deviation for aspheric mirror blank on centrifugal melting casting.Guangxue Jingmi Gongcheng/Optics and Precision Engineering,26(7),1719-1727.
MLA	Zhang, Xin-Ming,et al."Study on sensitivity of surface deviation for aspheric mirror blank on centrifugal melting casting".Guangxue Jingmi Gongcheng/Optics and Precision Engineering 26.7(2018):1719-1727.

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