ABSTRACT

Miao, X.; Wang, W., and Geng, Q., 2018. Removal mechanism of ship materials by micro ultrasonic machining. In: Liu, Z.L. and Mi, C. (eds.), Advances in Sustainable Port and Ocean Engineering. Journal of Coastal Research, Special Issue No. 83, pp. 68–73. Coconut Creek (Florida), ISSN 0749-0208.

Based on indentation fracture mechanics and force analysis of abrasive grains on the bottom of the workpiece micro ultrasonic machining hole, the mathematical model of ship material removal mode is established, and the roughness value is utilized as the removal standard for the brittle plastic of ship materials. The experiments is designed based on the theoretical model. The results show that the abrasive grain size has the biggest impact on the removal rate of ship materials. In different material removal modes, when the roughness value is >480 nm, the ship material is removed in the brittle mode. When the roughness value is <400nm, the material is removed in the plastic mode. The applicability of the model is proved by comparing the actual machining results and the expected machining results.

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