Modeling and experimental analysis of micro-cutting temperature on single crystal germanium

LI Jin-le; LI Shan; YANG Xiao-jing; YANG Hang-lin; MA Yi-ming

doi:10.13374/j.issn2095-9389.2019.11.21.003

Volume 42 Issue 11

Nov. 2020

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Article Navigation > Chinese Journal of Engineering > 2020 > 42(11): 1499-1506

LI Jin-le, LI Shan, YANG Xiao-jing, YANG Hang-lin, MA Yi-ming. Modeling and experimental analysis of micro-cutting temperature on single crystal germanium[J]. Chinese Journal of Engineering, 2020, 42(11): 1499-1506. doi: 10.13374/j.issn2095-9389.2019.11.21.003

Citation:

LI Jin-le, LI Shan, YANG Xiao-jing, YANG Hang-lin, MA Yi-ming. Modeling and experimental analysis of micro-cutting temperature on single crystal germanium[J]. Chinese Journal of Engineering, 2020, 42(11): 1499-1506. doi: 10.13374/j.issn2095-9389.2019.11.21.003

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Modeling and experimental analysis of micro-cutting temperature on single crystal germanium

doi: 10.13374/j.issn2095-9389.2019.11.21.003

1.
Faculty of Mechanical and Electrical Engineering, Kunming University of Science and Technology, Kunming 650500, China
2.
Kunming Nanxu Optoelectronics Technology Co. Ltd., Kunming 650214, China

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Corresponding author: E-mail: 624814911@qq.com
Received Date: 2019-11-21
Publish Date: 2020-11-25

Abstract

Abstract

Single crystal germanium is an important infrared optical material, which is widely used in defense industry, microelectronics, and other fields. It is extremely difficult to achieve the required surface quality by conventional processing methods due to its hardness and brittleness. Practically, single-point diamond tool is used for micro-cutting. During the micro-cutting process of single crystal germanium, the change of cutting temperature leads to increased tool wear and material surface hardening, which results in poor surface quality and also reduces processing accuracy. Therefore, analyzing the micro-cutting temperature distribution of single crystal germanium has become the key to better understanding its heat transfer mechanism and for improving product quality and efficiency. Aiming to analyze heat transfer mechanism of single crystal germanium micro-cutting, the moving heat source method was used. It establishes the theoretical model with temperature rise during micro-cutting of single crystal germanium under the action of the heat source of the shear slip surface and the friction heat source of the rake face and the chip, respectively. The maximum cutting temperature of germanium at three cutting speeds, and the model was verified with the cutting temperature of homogeneous hard and brittle material single crystal silicon. Through a single-point diamond turning experiment, an infrared thermal imager was used to measure the temperature of the single crystal germanium micro-cutting process online. When experimental measurement results and the model calculation results are compared, it revealed that the maximum cutting temperature of single crystal germanium has displayed same trend under different cutting speeds, which is that the cutting temperature is directly proportional to the cutting speed. The relative error is found to be between 2.56% and 6.64%. The relative error of the maximum cutting temperature is 3.84%. The model can accurately predict the temperature field of single crystal germanium and also for similar hard and brittle materials, providing further theoretical support for analyzing its thermal effects.
- temperature field,
- heat conduction,
- single crystal germanium,
- infrared thermal camera,
- cutting speed,
- micro-cutting

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References(26)

References

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