Dynamics modeling and analysis of feed drive system for a frame saw machine considering time-varying load

IF 1.2 4区工程技术 Q3 ENGINEERING, MECHANICAL

Mechanics & Industry Pub Date : 2021-01-01 DOI:10.1051/MECA/2021019

Depeng Sun, Jinsheng Zhang

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引用次数: 5

Abstract

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.

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考虑时变载荷的框架锯床进给传动系统动力学建模与分析

框架锯床是用于加工尺寸石材的机床之一。传统进给传动系统的速度波动导致了金刚石颗粒的过度磨损。在物料去除率较大的石材加工过程中，FDS的动态性能具有时变特性。本文提出了一种新的FDS。首先，利用集总参数法(LPM)建立了FDS的动态建模;然后比较了新型FDS与传统FDS的速度。最后，利用拉格朗日和状态空间方法求解了系统的频响特性。结果表明，新型FDS具有更快的响应速度和更小的速度波动。固有频率和加速度幅值随载荷的减小而增大。在时变载荷作用下，二阶固有频率范围比一阶固有频率范围增大50 Hz;模态试验验证了锯片的前两个固有频率都在FDS固有频率范围内。所提出的FDS可以指导设计，减少金刚石的磨损，提高加工质量。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Mechanics & Industry ENGINEERING, MECHANICAL-MECHANICS

CiteScore

2.80

自引率

0.00%

发文量

审稿时长

>12 weeks

期刊介绍： An International Journal on Mechanical Sciences and Engineering Applications With papers from industry, Research and Development departments and academic institutions, this journal acts as an interface between research and industry, coordinating and disseminating scientific and technical mechanical research in relation to industrial activities. Targeted readers are technicians, engineers, executives, researchers, and teachers who are working in industrial companies as managers or in Research and Development departments, technical centres, laboratories, universities, technical and engineering schools. The journal is an AFM (Association Française de Mécanique) publication.