Finite Element Modal Analysis of Ball Screws Linear Guide Feed Unit

Abstract:

With the high-speed and high-precision development of CNC machine tool, the vibration problem of ball screws linear guide feed unit has become more and more prominent. The dynamic characteristics was analyzed for ball screws linear guide feed unit, the 3D finite element model was built, the finite element modal analysis was discussed, the natural frequency and vibration modes were obtained, which were compared with the test results. The vibration weaknesses of ball screws linear guide feed unit were found out. The results show that the vibration weaknesses of ball screws linear guide feed unit occur mainly in the ball screws and its connection part with the worktable, its natural frequency are affected by its supporting pattern, and more close to the test results compared with those of ball screw feed unit without considering linear guide, which provide theoretical basis for the structure optimization of ball screws linear guide feed unit.

• Periodical: Applied Mechanics and Materials (Volumes 433-435)
• Pages: 67-71
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.433-435.67
• Online since: October 2013
• Authors: Xiang Rong Xu, Xian Chun Song, Hong Kui Jiang, Yan Feng Li
• Keywords: Ball Screws Linear Guide Feed Unit, Natural Frequency, Vibration, Vibration Mode

References

[1] Ebrahimi M., Whalley R. Analysis, modeling and simulation of stiffness in machine tool drives . Computers & Industrial Engineering, 2000, 38(2), pp.93-105.

DOI: 10.1016/s0360-8352(00)00031-0

[2] Zaeh, M. F, Oertli, Th, Milberg, J. Finite element modelling of ball screw feed drive systems. Manufacturing Technology, 2004, 53(1), pp.289-293.

DOI: 10.1016/s0007-8506(07)60700-8

[3] Zaeh, Michael F., Oertli, Thomas. Finite element formulation of pre-stressed ball screw drives. Proceedings of the 7th Biennial Conference on Engineering Systems Design and Analysis - 2004, 3, pp.289-296.

DOI: 10.1115/esda2004-58281

[4] Jun Zhu. Modal analysis and optimized design of structure of High speed vertical machining center (In Chinese) [D]. ShangHai: ShangHai Jiao Tong University, (2010).

[5] HuiDuan Zhang. Dynamics analysis of machine tool feed system (In Chinese) [D]. Jilin: Jilin University, (2009).

[6] ShuYun Jiang, ShuLong Zhu. Dynamic stiffness characteristics of the ball screw linear guideway joint (In Chinese) [J]. Chinese Journal of mechanical engineering, 2010, 46(1), pp.92-99.

DOI: 10.3901/jme.2010.01.092