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Cryogenic machining of PDMS fluidic channel using shrinkage compensation and surface roughness control

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Abstract

Polydimethylsiloxane (PDMS) is widely used in the fabrication of fluidic chips. Recently, a direct mechanical micromilling process using cryogenic cooling was considered to cut PDMS in order to reduce development time and prototyping costs. In this paper, the characteristics of cryogenic machining of PDMS were experimentally studied. The machined surface was analyzed with a variety of machining parameters, such as spindle speed and feed per tooth, and their effects on cutting temperature were examined. To improve geometric accuracy, a tool path compensation method that takes into account the shrinkage of PDMS at cryogenic temperatures was developed. Based on the preliminary results, the fabrication of a PDMS fluidic chip demonstrated that fluidic flow can be controlled by differences in the flow friction.

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Acknowledgements

This work was partially supported by the Technology Innovation Program (10053248, Development of Manufacturing System for CFRP Machining) funded by the Ministry of Trade, Industry & Energy (MOTIE), Republic of Korea.

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Authors and Affiliations

  1. Department of Mechanical Engineering, Yonsei University, 50, Yonsei-ro, Seodaemun-gu, Seoul, 03722, Republic of Korea

    Kyeongeun Song, Myeong Gu Gang & Byung-Kwon Min

  2. Department of Mechanical Engineering, Purdue University, 585 Purdue Mall, West Lafayette, IN, 47907-2088, USA

    Martin B. G. Jun

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  1. Kyeongeun Song
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  2. Myeong Gu Gang
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  4. Byung-Kwon Min
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Correspondence to Byung-Kwon Min.

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Song, K., Gang, M.G., Jun, M.B.G. et al. Cryogenic machining of PDMS fluidic channel using shrinkage compensation and surface roughness control. Int. J. Precis. Eng. Manuf. 18, 1711–1717 (2017). https://doi.org/10.1007/s12541-017-0199-9

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  • DOI: https://doi.org/10.1007/s12541-017-0199-9

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