Numerical investigation on dynamic characteristics of drilling shaft in deep hole drilling influenced by minimal quantity lubrication

被引:8
作者
Kong, Lingfei [1 ]
Li, Yan [1 ]
Lv, Yanjun [1 ]
Wang, Qinfeng [1 ]
机构
[1] Xian Univ Technol, Xian, Shaanxi, Peoples R China
基金
中国国家自然科学基金;
关键词
Minimal quantity lubrication; Hydrodynamic pressure; Dynamic responses; Instability rotational speed; Deep hole drilling; ROUNDNESS; SYSTEM;
D O I
10.1007/s11071-013-1014-5
中图分类号
TH [机械、仪表工业];
学科分类号
0802 ;
摘要
The dynamic characteristics of drilling shaft in deep hole drilling influenced by minimal quantity lubrication (MQL) is investigated. According to the features of the compressible fluid Reynolds equation in oil/air feature, a time-dependent mathematical model is established to describe the pressure distribution of cutting fluid with nonlinearity in MQL deep hole drilling. By introducing the differential transformation approach, the time-dependent pressure equation arising from cutting fluid is solved by the use of direct integral method. The influences of the rotational speed, the transverse displacement ratio, and radial clearance on the hydrodynamic pressure distribution of cutting fluid are obtained. The advantage of this method is to overcome much of the computational cost and has its rapid convergence rate. Furthermore, the nonlinear responses of drilling shaft influenced by MQL are analyzed, and the instability rotational speeds of drilling tool are discussed while the design parameters of drilling shaft system changing.
引用
收藏
页码:943 / 955
页数:13
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