Mechanics & Industry
Volume 22, 2021
|Number of page(s)||8|
|Published online||09 April 2021|
Dynamics modeling and analysis of feed drive system for a frame saw machine considering time-varying load
School of Mechanical Engineering, Shandong University, PR China
2 Key Laboratory of High-efficiency Clean Mechanical Manufacture of Ministry of Education
3 Research Centre for Stone Engineering, Shandong Province, Ji'nan 250061, PR China
* e-mail: email@example.com
Accepted: 23 February 2021
Frame saw machine is one of machine tools that is used to process dimension stone. The velocity fluctuation of traditional feed drive system (FDS) lead to excessive wear of diamond particles. The dynamic performance of the FDS has time-varying characteristics during the processing of stone with a large material removal rate. In this paper, a novel FDS was proposed. Firstly, the dynamic modeling of FDS was set up on account of lumped parameter method (LPM). Then the speed of the new FDS was compared with that of the traditional FDS. Finally, the frequency response characteristics of the system were solved by Lagrange and state space method. Results showed that the new FDS has a faster response feed and less velocity fluctuation. The natural frequency and the amplitude of acceleration increase with decreasing load. With the time-varying load, the range of the second-order natural frequency increased by 50 Hz, which was larger than that of the first-order. The modal test verified that the first two natural frequencies of the saw blade are within the range of the natural frequencies of FDS. The proposed FDS can guide for design, reduce the wear of diamond, and improve processing quality.
Key words: Feed drive system / dynamics modeling / frequency response analysis / time-varying load
© D. Sun and J. Zhang, Published by EDP Sciences 2021
This is an Open Access article distributed under the terms of the Creative Commons Attribution License (https://creativecommons.org/licenses/by/4.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
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