Dynamic Modal Analysis of CNC Precision Rotary Worktable

Abstract:

The dynamic performance of the worktable has a great influence on machining quality. In order to improve the machining precision, the paper conducts the analysis and research on the workability of a numerical control engine bed rotary worktable from a domestic machine tool factory，and discusses the influence of dynamic characteristics of rotary worktable on the precision of numerical control processing. Firstly Ansys finite element analysis was employed to analyze and simulate the modality and natural frequency of the numerical control rotary worktable under various steps. And then, a vibration test on the numerical control rotary worktable to confirm accuracy of the simulation parameters was carried on. Finally a contrast was made between the theoretical analysis and the experimental analysis to point out the resonance frequency and the distortion of the rotary worktable. Also the influence of numerical control rotary worktable on the numerical control processing was discussed.

• Periodical: Advanced Materials Research (Volumes 179-180)
• Pages: 787-792
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.179-180.787
• Online since: January 2011
• Authors: Qiang Cheng, Dong Sheng Xuan, Zhi Feng Liu
• Keywords: Dynamic Characteristic, Finite Element Analysis (FEA), Modality Analysis, Numerical Control Engine Bed, Rotary Worktable

References

[1] Dong Yuhong, Shao Junpeng, Zhou Shiren. CK7815 numerical control engine bed to feed servosystem modelling and simulation [J]. Harbin University of Science and Technology journal . 2005, 10(3): 25-30.

[2] Wu Nanxing, Sun Qinghong, Feng Jinghua. The engine bed to feed servo system non-linear friction characteristic and the control compensation studies the [J]. Journal of Southeast University, 2004, 34(6): 771-774.

[3] Liu Yang, Li Jingkui, Zhu Chunxia, Cai Guangqi. Straight line trundle guide rail junction plane parameter to numerical control engine bed dynamic characteristic influence, 2006, 27(12): 1369-1372.

[4] Zhang Huiduan, Tan Qingchang, Pei Yongchen. Platen dynamics analysis, 2008, 36(9): 68-71.

[5] AnayetU. Patwari, Waleed F. Faris, A.K.M. Nurul Amin, and S.K. Loh, Dynamic Modal Analysis of Vertical Machining Centre Components, Advances in Acoustics and Vibration, 2009, 1155-1164.

DOI: 10.1155/2009/508076

[6] Gu Huafeng, Hong Rongjing. Numerical control engine bed rotary table dynamic performance analysis and simulation, 2008, 36(5): 216-219.

[7] Zaeh M.F., Oertli Th., Finite Element Modeling of Ball Screw Feed DriveSystem, Annals of CIRP, 2004, 53(1): 289-292.

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

[8] Jia Hongguang, Wu Yihui, Yu Zhenlei, Wang Liding. The piezoelectricity actuates the micro displacement work table dynamic analysis, the Chinese Academy of Science Changchun optics precision machinery and the institute of physics, 2000, 8(5): 440-442.