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	Optimizing parameters for magnetorheological finishing supersmooth surface
	Cheng, HB ; Feng, ZJ ; Wang, YW
	2010-05-10 ; 2010-05-10
会议名称	Optical Design and Testing II, Pts 1 and 2 ; Conference on Optical Design and Testing II ; Beijing, PEOPLES R CHINA ; Web of Science ; INSPEC
关键词	magnetorheological finishing asphere interferometric testing magnetic dipole OPTICAL FABRICATION ASPHERICAL SURFACES SMOOTH Optics
中文摘要	This paper presents a reasonable approach to this issue, i.e., computer controlled magnetorheological finishing (MRF). In MRF, magnetically stiffened magnetorheological (MR) abrasive fluid flows through a preset converging gap that is formed by a workpiece surface and a moving rigid wall, to create precise material removal and polishing. Tsinghua University recently completed a project with MRF technology, in which a 66 mm diameter, f/5 parabolic mirror was polished to the shape accuracy of lambda/17 RMS (lambda=632.8nm) and the surface roughness of 1.22 nm Ra. This was done on a home made novel aspheric computer controlled manufacturing system. It is a three-axis, self-rotating wheel machine, the polishing tool is driven with one motor through a belt. This paper presents the manufacturing and testing processes, including establish the mathematics model of MRF optics on the basis of Preston equation, profiler test and relative coefficients, i.e., pressure between workpiece and tool, velocity of MR fluid in polishing spot, tolerance control of geometrical parameters such as radius of curvature and conic constant also been analyzed in the paper. Experiments were carried out on the features of MRF. The results indicated that the required convergent speed, surface roughness could be achieved with high efficiency.
会议录出版者	SPIE-INT SOC OPTICAL ENGINEERING ; BELLINGHAM ; 1000 20TH ST, PO BOX 10, BELLINGHAM, WA 98227-0010 USA
语种	英语 ; 英语
内容类型	会议论文
源URL	[http://hdl.handle.net/123456789/19205]
专题	清华大学
推荐引用方式 GB/T 7714	Cheng, HB,Feng, ZJ,Wang, YW. Optimizing parameters for magnetorheological finishing supersmooth surface[C]. 见:Optical Design and Testing II, Pts 1 and 2, Conference on Optical Design and Testing II, Beijing, PEOPLES R CHINA, Web of Science, INSPEC.

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