数控金属切割机进给驱动系统的动力学建模

IF 0.9 Q4 ACOUSTICS

Sound and Vibration Pub Date : 2021-01-01 DOI:10.32604/SV.2021.04410

H. Heydarnia, I. Kiselev, M. M. Ermolaev, S. Nikolaev

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引用次数: 0

摘要

研究进给传动系统的振动特性对提高数控机床的结构性能具有重要意义。作为进给传动的两个重要工况，螺杆和螺母位置上的预紧力对进给传动的振动特性影响很大。在加工小零件时，螺杆的旋转加速度也会影响数控进给传动的性能。本文研究了预紧力和螺母位置对数控金属切割机进给驱动系统振动特性的影响，以便能够消除观察到的在高转速下发生的共振，对应于高进给速率。此外，选择合理的进给驱动系统结构参数，以增加旋转加速度，从而提高数控机床的性能。实验和分析表明，通过选择特定的进给驱动系统参数，同时施加一定的预紧力，可以实现高转速下旋转加速度提高97%，考虑抗振时间减少30%的目标。

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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Dynamic Modeling of the Feed Drive System of a CNC Metal Cutting Machine

Studying the vibrational behavior of feed drive systems is important for enhancing the structural performance of computer numerical control (CNC) machines. The preload on the screw and nut position have a great influence on the vibration characteristics of the feed drive as two very important operational conditions. Rotational acceleration of the screw also affects the performance of the CNC feed drive when machining small parts. This paper investigates the influence of preload and nut position on the vibration characteristics of the feed drive system of a CNC metal cutting machine in order to be able to eliminate an observed resonance occurred at high rotational speeds of the screw, corresponding to high feed rates. Additionally, rational structural parameters of the feed drive system are selected in order to increase the rotational acceleration for improving the performance of the CNC machine. Experiments and analyses showed that by selecting specific parameters of feed drive system and simultaneously applying a certain value of preload, a 97% increase in rotational acceleration and 30% time reduction considering the vibration resistance at high rotational speeds can be achieved.

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来源期刊

Sound and Vibration 物理-工程：机械

CiteScore

1.50

自引率

33.30%

发文量

审稿时长

>12 weeks

期刊介绍： Sound & Vibration is a journal intended for individuals with broad-based interests in noise and vibration, dynamic measurements, structural analysis, computer-aided engineering, machinery reliability, and dynamic testing. The journal strives to publish referred papers reflecting the interests of research and practical engineering on any aspects of sound and vibration. Of particular interest are papers that report analytical, numerical and experimental methods of more relevance to practical applications. Papers are sought that contribute to the following general topics: -broad-based interests in noise and vibration- dynamic measurements- structural analysis- computer-aided engineering- machinery reliability- dynamic testing