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Quantitative study of the milling parameters in vibratory milling |
| CHEN Ken1,2, Nguyen Hoa Binh1, WU Dan1,2, LIU Fei1 |
1. Department of Mechanical Engineering, Tsinghua University, Beijing 100084, China;
2. Beijing Key Lab of Precision/Ultra-precision Manufacturing Equipments and Control, Beijing 100084, China |
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Abstract The extraction rate of protein extracted from biological tissue depends on the particle size of the biological tissue powder; therefore, the biological tissue particle sizes need to be smaller to improve protein extraction. Vibratory milling method is widely used for size reduction of biological tissue products with the milling product size and milling efficiency significantly affected by the milling process parameters, such as the collision frequency and impact energy. The effects of the milling parameters on the milling process were studied using the event driven method (EDM) to construct a dynamic model of one milling ball in a milling vial in a vibratory milling mechanism. The effects of the vibration frequency, the vibration amplitude and the milling vial diameter on the collision frequency and the impact energy were then investigated. Increases in the vibration frequency and amplitude increased the collision frequency and impact energy. For a fixed milling vial volume, an increase in the milling vial diameter reduced the collision frequency and the impact energy. The results provide a theoretical basis for milling mechanism design and parameter selection.
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| Keywords
vibratory ball milling
event driven method (EDM)
milling parameter
collision frequency
impact energy
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Issue Date: 15 March 2016
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2016,
Vol. 56
