Ultra-Precision Machining of Off-Axis Convex Ellipsoidal Surface Using Two Different Accurate Spiral Tool Paths

Ji, Shuai; Yu, Hui Juan; Zhao, Jun

doi:10.4028/www.scientific.net/kem.609-610.745

Cited by 3 publications

(2 citation statements)

References 9 publications

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“…7 Shijun Ji et al analyzed two ultraprecision machining methods for off-axis paraboloid and proved that the paraboloid obtained by machining the cylindrical workpiece around the paraboloid axis has better surface quality. 8 Zhiwei Zhu et al proposed an adaptive tool servo diamond turning method for improving the surface quality and machining efficiency. By using this method, they accomplished the ultraprecision machining of general surface and took the processing of sinusoidal surface as an example for experimental verification.…”

Section: Introductionmentioning

confidence: 99%

Machining precision controlling method for plane surface assisted by SPDT

Zhao

et al. 2021

Composites and Advanced Materials

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In traditional processing mode, a given lathe and a set of fixed processing system can only produce a predetermined precision part. This article proposes a machining method that can control the surface precision of machining plane parts, and four gaskets with different accuracy requirements are processed on the same slow tool servo single-point diamond lathe for experimental verification. Then, the Peak Village (PV) value and surface topography of the processed parts were measured using the surface profiler Taylor Hobson PGI 1240 and Keyence VR-3200, respectively. Through the processing and analysis of the measured data, the maximum deviation between the PV value and the given PV value is 2.4 µm, the minimum deviation is 0.4 µm. And the PV value obtained by calculating the helical spacing measured by surface topography according to the method in this article is approximately equal to the measured PV value, so the correctness of the machining method is verified. Therefore, the machining method can control the surface accuracy of machining parts accurately according to the required accuracy.

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Section: Introductionmentioning

confidence: 99%

Machining precision controlling method for plane surface assisted by SPDT

Zhao

et al. 2021

Composites and Advanced Materials

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“…8 Recently, single point diamond turning (SPDT) has become a standard machining process of producing precision optical surfaces in one-stage process without subsequent processing. 9–11 The research has made great progress for freeform surface ultra-precision machining in recent years. For instance, Zhang et al 2 proposed the coordinate transformation machining method to manufacture the off-axis aspheric mirrors with large off-axis magnitude by reducing the ratio of sag height to diameter and this method proved to be feasible.…”

Section: Introductionmentioning

confidence: 99%

Analysis and comparison of two different ultra-precision manufacturing methods for off-axis parabolic mirror with single point diamond turning

Zhao

et al. 2016

Proceedings of the Institution of Mechanical Engineers, Part B:

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Off-axis aspheric mirror is an important component widely used in optical system and precision measurement instrument. Off-axis parabolic surface is one typical shape of off-axis aspheric mirrors which can enlarge focal length and widen field-of-view. Two typical ultra-precision turning methods which are turning the cylindrical blank by revolving around the axis of parabolic surface (TPS) and revolving around the axis of cylindrical surface (TCS) are analyzed and compared for off-axis parabolic surface in this article. Three-axis (X, Z, C) turning machine is applied and kinematic analyses of two linear axes (X, Z) are studied during cutting with the single point diamond turning. The tool paths are generated and installation errors are analyzed under two different conditions. Primary experiments are conducted to verify the effectiveness of theoretical analyses. The obtained results demonstrate that the surface machined with TPS method has better machining quality than the one machined with TCS method.

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Tool path generation of turning optical freeform surfaces using arbitrary rake angle tools

You¹,

Yan²,

Li³

et al. 2020

Opt. Express

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Slow tool servo diamond turning has widespread application in fabricating freeform optics. Previous studies are focused on the methods of the tool path generation and verification of zero-rake-angle tools. However, these methods are unsuitable for non-zero-rake tools that are used for machining hard-and-brittle materials. This paper presents a universal location-point-drive tool path generation method, which caters to arbitrary rake angle tools and the steady X movement feature, and the corresponding universal tool interference check method. Systematic analysis and ultra-precision machining experiments confirmed the feasibility of our methods and present better surface quality and form accuracy compared to the traditional method.

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Ultra-Precision Machining of Off-Axis Convex Ellipsoidal Surface Using Two Different Accurate Spiral Tool Paths

Cited by 3 publications

References 9 publications

Machining precision controlling method for plane surface assisted by SPDT

Machining precision controlling method for plane surface assisted by SPDT

Analysis and comparison of two different ultra-precision manufacturing methods for off-axis parabolic mirror with single point diamond turning

Tool path generation of turning optical freeform surfaces using arbitrary rake angle tools

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