Discrete element method and experiments applied to a new impeller blade design for enhanced coverage and uniformity of shot blasting

Choi, Dong-Myung; Kim, Tae-Hyung; Yang, Chulho; Nam, Jaehyeon; Park, J.

doi:10.1016/j.surfcoat.2019.04.008

Cited by 4 publications

(7 citation statements)

References 18 publications

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“…When shot blasting is performed using a conventional control cage, the distribution of shot marks on the substrate is elliptical. Some studies have reported that the density of shot marks is high in the central area and decreases toward the edges 23 . These elliptical-shaped shot marks have lower coverage and uniformity than rectangular shot marks and, in particular, become more significant as blasting is repeated.…”

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confidence: 99%

“…In addition, Marini et al 22 showed that the measured residual stress field at the V-edge notch agrees well with the finite element method thermal field corrected with experimental data. Further, Choi et al 23 proposed a newly designed impeller blade to improve coverage and uniformity through DEMs and experiments.…”

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confidence: 99%

“…In other words, the standard deviation of the coverage of each cell is defined as uniformity. A detailed calculation of uniformity is presented in the literature 23 . In this study, uniformity was calculated by dividing one…”

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confidence: 99%

“…To address this issue, we changed the design of the proposed control cage. Notably, this issue can also be addressed by changing the shape of the blade, as reported in the literature 23 .…”

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confidence: 99%

“…As shown in Fig. 6, shot blasting equipment, similar to that used in the literature 23 , with a 0.25 m diameter impeller (Model No. PMI0608) was used for the experiments.…”

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confidence: 99%

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New design for control cage to enhance coverage and uniformity of shot blasting and its validation using DEM and experiment

Seo

Kim

Yang

et al. 2023

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Unlike shot peening, shot blasting is a process that primarily uses shot balls to remove foreign substances from metal surfaces. Shot blasting is classified into air-blowing and impeller-impact types. The latter is widely used in commercial large-scale shot blasting. This study proposes a new control cage with a concave or convex shape to improve coverage and uniformity in the impeller-impact type shot blaster. The effectiveness of the proposed control cage is verified using discrete element methods and experiments. Moreover, the optimal design in terms of mass flow, coverage, and uniformity is confirmed. Additionally, the distribution of marks on the surface is analyzed through experiments and simulations. Further, the shot ball is projected over a wider area on the surface when the new concave and convex model is employed at the control cage. Consequently, we confirm that the control cage with a concave shape forms approximately a 5-% higher coverage than the conventional model and uniform shot marks while using a low mass flow rate.

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confidence: 99%

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confidence: 99%

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confidence: 99%

“…To address this issue, we changed the design of the proposed control cage. Notably, this issue can also be addressed by changing the shape of the blade, as reported in the literature 23 .…”

mentioning

confidence: 99%

“…As shown in Fig. 6, shot blasting equipment, similar to that used in the literature 23 , with a 0.25 m diameter impeller (Model No. PMI0608) was used for the experiments.…”

mentioning

confidence: 99%

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