Study on the extraction and reconstruction of arbitrary frequency topography from precision machined surfaces

Pang, Qilong; Kuang, Liangjie; Xu, Yun; Dai, Xiang

doi:10.1177/0954405418802307

Cited by 5 publications

(3 citation statements)

References 28 publications

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“…KH 2 PO 4 (KDP) crystals, which have interesting photophysical properties, such as piezoelectricity, dielectricity, and electro-optical properties, are optical materials with excellent performance. KDP crystals, which are required in inertial confinement nuclear fusion [1][2][3][4][5], can be used under a wide transmission band, large nonlinear optical coefficient, and high damage threshold (greater than 15 J/cm 2 , 1 ns). In addition, they can grow large-diameter crystals (Φ500-600 mm) [6][7][8].…”

Section: Introductionmentioning

confidence: 99%

Ultra-Precision Cutting Mechanism of KDP Crystal in Microplastic Region via Heating Assistance

Yang

Huang

et al. 2023

Applied Sciences

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The application range of potassium dihydrogen phosphate (KDP) crystals can be expanded by enhancing their surface quality properties. Therefore, a method for controlling the surface-temperature field of various materials was developed to expand the plastic zone to overcome the difficulty in processing KDP crystals. The ductile/brittle transition depth of the KDP crystals was determined using a 38 nm nanoindentation experiment. The nanoscratch experiment revealed the rules of how the transformation depth of the KDP crystals changes with temperatures, and the effect of temperature on the microstructure of the KDP crystals was studied. Finally, KDP crystal surfaces were processed using a UPDFC machine at elevated temperatures. According to our experiments, the surface roughness of the KDP crystal reached 5.275 nm as temperature increased, thus enhancing its surface quality. This method could be applied to other brittle materials.

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Section: Introductionmentioning

confidence: 99%

Ultra-Precision Cutting Mechanism of KDP Crystal in Microplastic Region via Heating Assistance

Yang

Huang

et al. 2023

Applied Sciences

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“…The effect of cutting parameters on the surface topography is mainly reflected in the frequency features. 10 In this article, the relationship between the cutting parameters and the actual frequency features can be obtained. The actual frequencies are analysed to find the relation between the cutting parameters and the machined surface topography.…”

Section: Introductionmentioning

confidence: 99%

The influence of cutting parameters on micro-topography of frequency features extracted from the machined KH₂PO₄ surfaces

Pang

Kuang

2020

Proceedings of the Institution of Mechanical Engineers, Part B:

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Using reasonable cutting parameters of machining process is an effective and convenient means of improving the topography of the machined surfaces. In this study, the methods to find optimised cutting parameters can be obtained by studying the relationship between the cutting parameters and the micro-topography of frequency features in the machined KH2PO4 surfaces. Using the power spectral density and continuous wavelet transform methods, the 2D micro-topographies of frequencies corresponding to different cutting parameters are extracted from the machined KH2PO4 surfaces. The results for the extracted micro-topography are used to analyse the influence of cutting parameters on the spatial frequency feature which consists of the wavelength and amplitude. The middle-frequency feature reflects the variations of depth of cut and spindle speed, and the amplitude of it is directly proportional to depth of cut and spindle speed. The low-frequency feature reflects the variations of the feed rate and decreases to a smaller value when the feed rate increases. The high-frequency feature is mainly affected by the material properties and the vibrations that occur during processing. Comparing the micro-topography of frequencies under different cutting parameters, the depth of cut (3 μm), the spindle speed (400 r/min) and the feed rate (8 μm/r) are the optimised cutting parameters for the machine tools used in this article. In the process of reconstructing the arbitrary frequency topography, the continuous wavelet transform method can compensate for the deficiencies of the power spectral density method for extracting frequencies.

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“…Tangjitsitcharoen et al 27 proposed a method to predict the surface roughness during the ball-end milling process by utilizing the wavelet transform to monitor and decompose the dynamic cutting forces. Pang et al 28 put forward an extraction and reconstruction method for arbitrary 2-D and 3-D frequency features in precision machined surfaces based on the combination of power spectrum density and continuous wavelet transform to analyze the potassium dihydrogen phosphate crystal surface topography.…”

Section: Introductionmentioning

confidence: 99%

A surface modeling method for product virtual assembly based on the root mean square of the regional residuals

Qiu

Zhang

et al. 2019

Proceedings of the Institution of Mechanical Engineers, Part B:

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The micro-topographic quality of a product’s surface directly affects the performance of the virtual assembly. The computational precision of the fractal dimension has a significant effect on the accuracy of the virtual assembly model. To address the imprecision and large deviation of the calculation method under some conditions, a virtual product assembly surface modeling method is proposed in this article based on the root mean square of the area residuals. First, the fractal dimension of the surface is calculated using the regional residual root mean square (3R method). The feasibility of the 3R method is verified by comparing with the existing methods on isotropic and anisotropic surfaces. Second, the fractal dimension of a real part surface is obtained using the 3R method. According to the Weierstrass–Mandelbrot function, a partial surface model of the machined part is established. The surface contours, roughness, waviness, and flatness of the part are extracted by wavelet transform. Then, the digital surface model for virtual assembly with the same profile parameters is generated by reconstructing the surface contours of the actual parts. Finally, the method proposed by taking the virtual assembly of a VTM200/F5 turn-milling composite machining center guideway is verified in this article.

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Study on the extraction and reconstruction of arbitrary frequency topography from precision machined surfaces

Cited by 5 publications

References 28 publications

Ultra-Precision Cutting Mechanism of KDP Crystal in Microplastic Region via Heating Assistance

Ultra-Precision Cutting Mechanism of KDP Crystal in Microplastic Region via Heating Assistance

The influence of cutting parameters on micro-topography of frequency features extracted from the machined KH₂PO₄ surfaces

A surface modeling method for product virtual assembly based on the root mean square of the regional residuals

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Study on the extraction and reconstruction of arbitrary frequency topography from precision machined surfaces

Cited by 5 publications

References 28 publications

Ultra-Precision Cutting Mechanism of KDP Crystal in Microplastic Region via Heating Assistance

Ultra-Precision Cutting Mechanism of KDP Crystal in Microplastic Region via Heating Assistance

The influence of cutting parameters on micro-topography of frequency features extracted from the machined KH2PO4 surfaces

A surface modeling method for product virtual assembly based on the root mean square of the regional residuals

Contact Info

Product

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The influence of cutting parameters on micro-topography of frequency features extracted from the machined KH₂PO₄ surfaces