High-efficient fabrication of infrared optics with uniform microstructures by a semi-ductile diamond milling approach

Li, Peizheng; Wang, Sujuan; To, Suet; Sun, Zhanwen; Jiao, Jie; Xu, Shijun

doi:10.1007/s00170-023-11140-7

Cited by 4 publications

(1 citation statement)

References 33 publications

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“…A trend in the development of analytical cutting models is their use for high-precision machining with diamond tools. Li and colleagues [94] proposed a novel semi-ductile diamond milling (SDDM) method. Sun et al proposed an analytical model for calculating the cutting force during ultra-precision grooving machining (UPFG) with a diamond tool, taking into account the kinematics of the process, material microstructure, tool geometry, chip formation mechanism, and elastic recovery of the machined material [95].…”

Section: Cutting Force Calculation Using Analytical Modelsmentioning

confidence: 99%

Improvement of Analytical Model for Oblique Cutting—Part I: Identification of Mechanical Characteristics of Machined Material

Storchak,

Lekveishvili

2023

Metals

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Analytical cutting models have recently become quite widespread due to the simplicity and rapidity of calculations as well as the stability of the solutions. This paper considers a procedure for determining the mechanical properties of machined material based on parameters for the analytical model of oblique cutting for a certain range of changes in cutting modes and inclination angles of the tool cutting edge. The model is based on the energy method of determining the main cutting process characteristics using the extreme assumptions of continuum mechanics. It is proposed to determine the parameters characterizing the mechanical properties of the processed material using the Johnson–Cook constitutive equation in two stages: preliminary determination of the constitutive equation parameters based on the results of mechanical compression specimen tests and experimental data of the oblique cutting process, and specifying the generalized values of the constitutive equation parameters using the inverse method through the finite element cutting model. The adequacy of the applied analytical cutting model is confirmed by comparing the kinetic characteristic values calculated using the analytical model of oblique cutting with the application of the specified parameters of the constitutive equation and the measured values of the kinetic characteristics. The deviation between the calculated and measured values of the cutting force components when changing the cutting depth (undeformed chip thickness) does not exceed 15%. The difference between the calculated and measured values of the cutting force components when the cutting speed is changed is about 20%.

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Section: Cutting Force Calculation Using Analytical Modelsmentioning

confidence: 99%

Improvement of Analytical Model for Oblique Cutting—Part I: Identification of Mechanical Characteristics of Machined Material

Storchak,

Lekveishvili

2023

Metals

View full text Add to dashboard Cite

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Fabrication of the optical lens on single-crystal germanium surfaces using the laser-assisted diamond turning

Du,

Wang,

et al. 2024

Int J Adv Manuf Technol

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Single-crystal germanium, as an excellent infrared optical material, has been widely applied in X-ray monochromators, night vision systems, and gamma radiation detectors. However, how to obtain high-quality optical lenses on their surfaces still faces challenges due to their hard and brittle properties. To this end, this paper proposes the in situ laser-assisted diamond turning (ILADT) process, which is the combination of a laser heating technique and a single-point diamond turning process. The in situ laser heating technique is employed to enhance the surface quality of the workpiece material, while the single-point diamond turning process is utilized to fabricate optical lenses. Experimental results showed that optical lenses with high surface quality were successfully machined. The profile error is 0.135 μm, indicating the high machining accuracy. The surface roughness Sa of the aspheric lens is 0.909 nm, indicating the high machining quality achieved by the proposed ILADT process. Therefore, this study provides an effective approach for producing high-quality optical lenses on single-crystal germanium surfaces, which holds great promise for future applications in the manufacturing of optical lenses with exceptional quality.

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Feature-adaptive toolpath planning with enhanced surface texture uniformity for ultra-precision diamond milling of freeform optics

Guo,

Wei,

Zhang

et al. 2024

Journal of Materials Processing Technology

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High-efficient fabrication of infrared optics with uniform microstructures by a semi-ductile diamond milling approach

Cited by 4 publications

References 33 publications

Improvement of Analytical Model for Oblique Cutting—Part I: Identification of Mechanical Characteristics of Machined Material

Improvement of Analytical Model for Oblique Cutting—Part I: Identification of Mechanical Characteristics of Machined Material

Fabrication of the optical lens on single-crystal germanium surfaces using the laser-assisted diamond turning

Feature-adaptive toolpath planning with enhanced surface texture uniformity for ultra-precision diamond milling of freeform optics

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