Study of ultra-precision diamond turning of a microlens array with a fast tool servo system

To, Suet; Kwok, Tsz Chun; Cheung, Chi Fai; Lee, Wing Bun

doi:10.1117/12.674215

Cited by 14 publications

(7 citation statements)

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“…Equally spaced angles is the most common method used to generate cutter points on -plane spiral cutter tool path, and some typical complex surfaces with high precision are machined using the cutter points generated by equally spaced angles, such as off-axis aspheric surface [1,3,13] and microlens array [14][15][16]. Equally spaced angles refering to the central angles are equal for any adjacent cutter points on the same spiral revolution.…”

Section: Cutter Point Of Equally Spaced Anglesmentioning

confidence: 99%

An Improved Method for Generating Cutter Points Based on Required Form Accuracy of the Machining Surface

Zhao

2015

Mathematical Problems in Engineering

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Recently, freeform surfaces are widely used in optical field. Fabrication of freeform surface optics needs high machining accuracy and high efficiency simultaneously. Using the present ultraprecision manufacturing technologies, the form accuracy of freeform surfaces can reach submicrometric or even nanometer range but at the cost of low efficiency; moreover, the form accuracy cannot be predicted; the number and the position of cutter points cannot be accurately controlled before practical machining. A novel strategy of cutter points distribution is proposed in the paper, which is based on the required accuracy of the freeform surface and the machining efficiency can be improved by eliminating redundant cutter points on the processing trajectory. The new idea is detailed, simulations are conducted, and experiments are done to verify the feasibility of the proposed method in fabricating two sinusoidal ring surfaces.

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Section: Cutter Point Of Equally Spaced Anglesmentioning

confidence: 99%

An Improved Method for Generating Cutter Points Based on Required Form Accuracy of the Machining Surface

Zhao

2015

Mathematical Problems in Engineering

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“…The selection of the optimal cutting parameters (depth of cut, feed rate, spindle speed, surface speed and driving frequency of the FTS) in ultra-precision turning of microlens arrays have been researched. To et al [14] investigated the effect of the cutting conditions, such as the depth of cut, feed rate, spindle speed and surface speed, on the microlens array in ultra-precision diamond turning with a fast tool servo (FTS) and found the optimal surface roughness and surface profiles. Yu et al [15] studied the optimal selection of the machining parameters, including the spindle speed, sample number, feed rate and tool geometry, in fabricating a micro-structure surface.…”

Section: Introductionmentioning

confidence: 99%

Influence of machining errors on form errors of microlens arrays in ultra-precision turning

Liu

Zhang

Fang

et al. 2015

International Journal of Machine Tools and Manufacture

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“…FTS system fetches the angular position signalφ and radial position signal r in real-time, then drives the cutting tool to the desired z position with high frequency and precisely. The principle of FTS machining is shown in Fig 1 [5]. The sketch graph of FTS fabricating is shown in Fig 2. φ φ φ Figure 1: the principle of FTS machining Figure 2: Schematic drawing of FTS fabricating…”

Section: Introductionmentioning

confidence: 99%

A surface data generation method of optical micro-structure and analysis system for Fast Tool Servo fabricating

et al. 2010

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High-precision optical micro-structured components are now widely used in the field of military and civilian use. Ultraprecision machining with a fast tool servo (FTS) is one of the leading methodologies for fabrication of such surfaces. The first important issue that faced in ultra-precision and high-effectively fabricating is how to properly describe the complex shapes based on the principle of FTS. In order to meet the demands of FTS machining that need for tool high-frequency response, high data throughput and huge memory space, an off-line discrete data points generation method for microstructure surfaces is presented which can avoid on-line shape calculation in fabricating process. A new analysis software package is developed to compute the speed, acceleration and spectrum over the generated data points which helps to analysis the tool tracking characteristics needed in fabricating. Also a new mechanism for FTS machining data transmission based on the huge-capacity storage device is proposed. Experiments show that the off-line surface data generation method and data transfer mechanism can effectively improve FTS fabricating efficiency, the surface analysis software can help to determine the machining ability of tool-holder and to guide and optimize the processing parameters such as spindle speed, feed rate, etc.

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Study of ultra-precision diamond turning of a microlens array with a fast tool servo system

Cited by 14 publications

References 0 publications

An Improved Method for Generating Cutter Points Based on Required Form Accuracy of the Machining Surface

An Improved Method for Generating Cutter Points Based on Required Form Accuracy of the Machining Surface

Influence of machining errors on form errors of microlens arrays in ultra-precision turning

A surface data generation method of optical micro-structure and analysis system for Fast Tool Servo fabricating

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