Mechanism of the crack propagation in the chip root in dry hard orthogonal turning of the hardened steel
Mechanism of the crack propagation in the chip root in dry hard orthogonal turning of the hardened steel
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淬硬钢干硬正交车削切屑根部裂纹扩展机理
DOI：
10.1016/j.ijmecsci.2018.02.020
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发表时间：
2018-04
影响因子：
7.3
通讯作者：
张玲
中科院分区：
文献类型：
--
作者：
唐林虎;高成秀;沈浩;林小军;张玲
Analytic model of the crack-tip field in the cutting tool tip located in the chip root in dry hard orthogonal turning (DHOT) of the hardened steel was established in this paper according to the metal cutting principle and fracture mechanics theory. The relationship between the crack inclination angle ψ to the direction of the tensile stressσand the crack propagation angle θ0in I-II mixed model also was proposed. The control equation, displacement function, and boundary condition of crack dynamic propagation in the chip root were derived. The mathematical model for the relationship between the shear angle ϕ and the crack propagation angle θ0also was presented. Furthermore, formation mechanisms of the serrated chip in DHOT of the hardened steel Cr12MoV (40–60 ± 1HRC) by utilizing the Polycrystalline Cubic Boron Nitride (PCBN) inserts were experimentally investigated. The results showed that the cutting speed and quenching hardness of workpiece have great influence on the crack propagation angle θ0. The shear angles ϕ calculated by the mathematical model are basically in agreement with the experimental results. The thermal softening chip squeezed from the cutting tool rake face begins to shear and slip at high speed along the direction of the crack propagation angle θ0in the chip root and then the serrated chip forms.
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DOI：
10.1007/s00170-013-5423-x
发表时间：
2013-10
期刊：
The International Journal of Advanced Manufacturing Technology
影响因子：
--
作者：
L. Tang;Chengxiu Gao;J. Huang;Xiaojun Lin;Junping Zhang
通讯作者：
L. Tang;Chengxiu Gao;J. Huang;Xiaojun Lin;Junping Zhang
影响因子：
--
作者：
Wang Wenhu
通讯作者：
Wang Wenhu
DOI：
10.1243/095440505x32445
发表时间：
2005-07
期刊：
Proceedings of the Institution of Mechanical Engineers, Part B: Journal of Engineering Manufacture
影响因子：
--
作者：
S. Belhadi;Tarek Mabrouki;J. Rigal;L. Boulanouar
通讯作者：
S. Belhadi;Tarek Mabrouki;J. Rigal;L. Boulanouar
DOI：
10.1016/s0007-8506(07)60018-3
发表时间：
2005
期刊：
CIRP Annals
影响因子：
--
作者：
F. Klocke;E. Brinksmeier;K. Weinert
通讯作者：
F. Klocke;E. Brinksmeier;K. Weinert
DOI：
--
发表时间：
2005
期刊：
Die & Mould Industry
影响因子：
--
作者：
Li-jun Wang
通讯作者：
Li-jun Wang