Dynamic Analysis and Optimization of WEDM Based on AWE and LMS

Abstract:

In the operation process, the Wire Electrical Discharge Machine (WEDM) has certain imperfections such as vibration and the descent of machine precision which vibration produces. This paper studies the dynamic parameter of the machine tool and optimizes the natural frequency and vibration. Taking the DK7725 taper machine tool as an example, the paper establishes a 3Dmodel with Pro-Engineer 5.0.According to the Masataks Yoshimura method, the authors could ascertain the stiffness and damping of joint surfaces among machine main parts and ascertain the equivalent dynamic model. In order to have a modal analysis about the machine tool structure, the virtual dynamic analysis module of ANSYS Workbench Environment (AWE) is used. Through the study of dynamic parameter, the authors optimize and improve the natural frequency and vibration of machine tools, compared with the finite element analysis results and the no-optimization data. And the final results show that the change rates of each order natural frequencies optimized ranges from 0% to18.9%, and the whole mechine’s optimization achieves satisfied effect.

• Periodical: Applied Mechanics and Materials (Volume 741)
• Pages: 772-778
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.741.772
• Online since: March 2015
• Authors: Hong Xu, Yi Chao Ding*, Chui Min Luo, Wen Yong Guan
• Keywords: Analysis Workbench Environment (AWE), Equivalent Model, Joint Surface, LMS Test, Modal Analysis, Optimization

References

[1] Z.M. Levina. Research on the Static Stiffness of Joints in Machine Tool. MTDR Conf. 1967; (8): 45-48.

[2] LI Tao, MA Chun-xiang. The dynamic characteristic analysis of the MB4250-2 high-precision control vertical honing machine[J]. Machinery Design and Manufacture. 2008; (11): 163-165.

[3] Yafeng Li, Yuxiu Xu. Operational modal analysis of wind turbine speed-increase gearbox. TELKOMNIKA Indonesian Journal of Electrical Engineering. 2013; 11(11): 6699-6705.

DOI: 10.11591/telkomnika.v11i11.3518

[4] Zhang Xiangyu, Xiong Ji, etc. Topological optimization of slide of machining center based on ansys. Manufacturing Technology and Machine Tool. 2008; (6): 68-74.

[5] Zhang Jie, Tong Zhongfang. The problem of dynamic modeling of bolted joints in machine tool. 1994; (3): 15-22.

[6] Fang Ziliang. Identification of Complex Modal Parameters. Journal of Nanjing University of Science and Technology. 2000; 24(1): 57-60.

[7] Zhang Xueliang, Huang Yumei, Wen Shuhua. Modelling Static basic Characteristic Parameter of Machine Tool Joint Surfaces and its Application. Manufacturing Technology and Machine Tool. 1998; (6): 8-10.

[8] ZHAO Weilong. A Reasearch about Dynamic Parameter Identification of A Machine Fixed Combination. Lanzhou: Lanzhou University of Technology. (2012).

[9] M. Yoshimura,T. Hamada,K. Yura. Design optimization of machine-tool structure with respect to dynamic characteristics. Design Automation Committee. Design and Production Engineering Technical Conference, Washington, D,C. 1985; 82-95.

DOI: 10.1115/1.3267353

[10] Liao Boyu, Zhou Xinmin, Yin Zhihong. Modern mechanical dynamics and its engineeringapplication: Modeling, analysis, simulation, control, optimization. Beijing: China Machine Press, (2004).

[11] Xiaopeng Li, Hao Guo, Jingnian Liu, Yali Liu. Dynamical Characteristics of the Linear Rolling Guide with Numerical Simulation and Experiment. TELKOMNIKA-Indonesian Journal of ElectricalEngineering. 2013; 11(1): 436-442.

DOI: 10.11591/telkomnika.v11i1.1920

[12] CaoYongsheng. Modalanalysis of high-speed magnetic levitation railway[D]. Changsha: National University of Defense Technology, (2003).