Abstract
Multi-particle velocities and trajectories in abrasive waterjet machining are of great value to understand the particle erosion mechanism involved in the cutting process. In this paper, the whole-stage simulation model is established from the high-pressure water and abrasive particles entering the nozzle to the mixed abrasive jet impacting the workpiece based on the SPH-DEM-FEM method. Comparing the simulation results with the experimental results under different process parameters, the capability of the proposed model is systematically validated. The model is applied to study the mixing and accelerating process of abrasive particles, and the results show that a speed difference is existed between the water and abrasive particles after being ejected from the nozzle. In addition, the nozzle wear pattern is also analyzed carefully. It is discovered that the most serious wear happened at the junction of the mixing chamber and the focusing tube. And the focusing tube wear is uneven and spreads downward.
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Funding
This work was supported by the National Natural Science Foundation of China (No. 51805476 and No. 91748204) and Science Fund for Creative Research Groups of National Natural Science Foundation of China (No.51821093).
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Mingming Du established the simulation model, designed the experiments, and completed the original draft of the research. Haijin Wang helped with the experiments and supplied critical revisions. Huiyue Dong is the project leader and provided crucial suggestions. Yingjie Guo offered key paper revisions to the article. Yinglin Ke participated in the paper revision.
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Du, M., Wang, H., Dong, H. et al. Numerical research on multi-particle movements and nozzle wear involved in abrasive waterjet machining. Int J Adv Manuf Technol 117, 2845–2858 (2021). https://doi.org/10.1007/s00170-021-07876-9
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DOI: https://doi.org/10.1007/s00170-021-07876-9