A study of dynamic stresses in micro-drills under high-speed machining

作者：Pei Yongchen; Tan Qingchang; Yang Zhaojun^*

来源：International Journal of Machine Tools and Manufacture, 2006, 46(14): 1892-1900.

DOI：10.1016/j.ijmachtools.2005.10.017

• rotor dynamics
• micro-drills
• dynamic stress

In this paper, a dynamic model of micro-drill-spindle system is developed using the Timoshenko, beam element from the rotor dynamics to study dynamic stresses of micro-drills. The model includes effects of eccentricity of the spindle-clamp-drill system, the axial drilling force, the system rotational inertia, the gyroscopic moment, and bearings of micro-hole drilling machines on bending deformation of micro-drills during machining. After the model is verified using the published work, effects of the clamped length of micro-drills, the bearing stiffness and damping, the spindle speed, the system eccentricity, and the axial drilling force on dynamic stresses of micro-drills are analyzed using the model.

• 出版日期2006-11
• 单位吉林大学