Study on Dynamic Characteristics of Feed Systems with Single and Double Ball Screws

Abstract:

As the executive component of CNC machine tools feed movement and auxiliary motion, feed system plays an important part in ensuring the positioning accuracy, sensitivity and stability. By taking single-screw-drive feed system and double-screw-drive feed system of CNC as the object of study, two-degree-of-freedom vibration models of them are established to analyze the dynamic characteristics, and further calculate modal vibration modes and natural frequencies. The finite element analysis models of the two systems are also established, concerning the influence of joint surface, vibration modes and natural frequencies are obtained by means of modal analysis. By comparing the simulation results and the calculated data, the feed systems vibration modes and natural frequencies can be accurately calculated by the proposed vibration models, and the relative errors of corresponding vibration frequencies are controlled within 15%.

• Periodical: Applied Mechanics and Materials (Volumes 433-435)
• Pages: 3-7
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.433-435.3
• Online since: October 2013
• Authors: Xi He Ding*, Jian Yong Zheng, Jun Tang Yuan, Zhen Hua Wang
• Keywords: Double-Screw-Drive, Dynamic Characteristic, Equivalent Model, Feed System

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