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Surface quality control technology of abrasive flow polishing S-shaped elbow

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Abstract

The quality of the inner surface of the elbow used by common types of engines has a serious impact on its performance. In order to improve the machining accuracy of the inner surface and enhance the uniformity of the whole structure, large eddy simulation is carried out for the flow channel in an S-shaped elbow with the abrasive flow by using KET subgrid model. The distribution of flow field, vortex formation law, and the influence of the vortex in the process of polishing surface quality are analyzed, and the processing experiment is carried out. The numerical simulation result shows the inlet pressure determines the inlet velocity of abrasive particle flow. Higher inlet pressure will significantly increase the shear force, improve the uniformity of turbulence kinetic energy distribution on the elbow wall, and increase the number of abrasive flow vortices. The experiment result shows the changes in inlet pressure and abrasive particle size have a significant effect of the polishing effect on S-shaped elbow. The combination of coarse abrasive and high inlet pressure will produce an over-polishing phenomenon, the inner surface roughness of the elbow can be reduced to 76 nm, and the optimal process parameters determined by the experimental research can achieve the uniform polishing of the S-shaped elbow by the abrasive flow machining technology.

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Funding

The authors receive funding support from the National Natural Science Foundation of China Nos. NSFC 51206011 and U1937201, Jilin Province Science and Technology Development Program of Jilin Province No. 20200301040RQ, Project of Education Department of Jilin Province No. JJKH20190541KJ, and Changchun Science and Technology Program of Changchun City No. 18DY017.

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Authors and Affiliations

  1. Ministry of Education Key Laboratory for Cross-Scale Micro and Nano Manufacturing, Changchun University of Science and Technology, Changchun, 130022, China

    Junye Li, Tuo Sui, Hui Lu, Huawen Zhou, Jinbao Zhu, Jianhe Liu & Jinzhe Li

  2. Chongqing Research Institute, Changchun University of Science and Technology, Chongqing, 401135, China

    Junye Li

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  1. Junye Li
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  2. Tuo Sui
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  3. Hui Lu
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  4. Huawen Zhou
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Contributions

Junye Li designed and performed the manuscript, analyzed the data, and drafted the manuscript. Tuo Sui and Hui Lu analyzed the data and supervised this study. Huawen Zhou and Jinbao Zhu conceived the project, and Jianhe Liu and Jinzhe Li organized the paper and edited the manuscript. All authors read and approved the manuscript.

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Correspondence to Huawen Zhou.

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Li, J., Sui, T., Lu, H. et al. Surface quality control technology of abrasive flow polishing S-shaped elbow. Int J Adv Manuf Technol 121, 683–699 (2022). https://doi.org/10.1007/s00170-022-09353-3

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  • DOI: https://doi.org/10.1007/s00170-022-09353-3

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