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Improved Soft Abrasive Flow Finishing Method Based on Turbulent Kinetic Energy Enhancing

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Abstract

Soft abrasive flow(SAF) finishing can process the irregular geometric surfaces, but with the matter of low processing efficiency. To address the issue, an improved SAF finishing method based on turbulent kinetic energy enhancing is proposed. A constrained flow passage with serration cross-section is constructed to increase the turbulence intensity. Taking the constrained flow passage as the objective, a two-phase fluid dynamic model is set up by using particle trajectory model and standard k-ε turbulence model, and the flow field characteristics of the flow passage are acquired. The numerical results show that the serration flow passage can enhance the turbulence intensity, uniform the particles distribution, and increase the particle concentration near the bottom wall. The observation results by particle image velocimetry(PIV) show that the internal vortex structures are formed in flow passage, and the abrasive flow takes on turbulence concentrating phenomenon in near-wall region. The finishing experiments prove that the proposed method can obtain better surface uniformity, and the processing efficiency can be improved more 35%. This research provides an abrasive flow modeling method to reveal the particle motion regulars, and can offer references to the technical optimization of fluid-based precision processing.

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Authors and Affiliations

  1. Key Laboratory of E&M, Zhejiang University of Technology of Ministry of Education and Zhejiang Province, Hangzhou, 310014, China

    Jun LI, Shiming JI & Dapeng TAN

  2. School of Information Science and Engineering, Hangzhou Normal University, Hangzhou, 311121, China

    Jun LI

Authors
  1. Jun LI
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  2. Shiming JI
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  3. Dapeng TAN
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Correspondence to Dapeng TAN.

Additional information

Supported by National Natural Science Foundation of China (Grant Nos. 51375446, 51575494), and Zhejiang Provincial Natural Science Foundation of China (Grant Nos. LR16E050001, LZ14E050001).

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LI, J., JI, S. & TAN, D. Improved Soft Abrasive Flow Finishing Method Based on Turbulent Kinetic Energy Enhancing. Chin. J. Mech. Eng. 30, 301–309 (2017). https://doi.org/10.1007/s10033-017-0071-y

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  • DOI: https://doi.org/10.1007/s10033-017-0071-y

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