期刊
JOURNAL OF MANUFACTURING PROCESSES
卷 44, 期 -, 页码 337-348出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.jmapro.2019.06.018
关键词
Hard milling; Serrated chip; Finite element analysis; Shear damage; Micro-crack; Localized plastic strain
资金
- National Natural Science Foundation of China [51575321, 51175309]
- Taishan Scholars Program of Shandong Province
Due to the intermittent cutting processes and variation of undeformed chip thickness, hard milling process displays evident differences regarding thermo-mechancial loads compared to turning process; therefore, a comprehensive understanding of chip formation mechanism in hard milling operation is urgent. In this study, the effect of cutting speed on chip characteristics was experimentally investigated concurently with finite element simulation. The main objective of this study concerns the serrated chip formation accompanying micro-cracks and physical phenomena which was achieved using finite element method (FEM). First, hard milling simulation model was proposed based on Johnson-Cook visco-plastic constitutive material model combined with Johnson Cook damage accounting for shear localization. Second, the proposed FE model was validated using acquired experimental results. The predicted results are in a good agreement with experimental results regrading chip morphology and cutting forces. In addition, the physical phenomena governing the formation of serrated segment and micro-cracks were discussed and clarified deeply through FE analysis. Finally, the localized plastic strain state on the machined surface associated with serrated segment formation was observed and indentified. This research, on one hand, can deepen the understanding of the formation mechanism of serrated segment; on the other hand, the results also provide guidance for cutting parameters optimization and desired machined surface integrity control.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据