Stability analysis of chatter vibration for a thin-wall cylindrical workpiece

Lai, Guang-Jer; Chang, Jincai

doi:10.1016/0890-6955(94)e0011-7

Cited by 14 publications

(4 citation statements)

References 1 publication

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“…However, the issue of turning of the challenging thin-walled tubular workpieces has rarely been involved. Compared with solid structures, the dynamic characteristics of thinwalled workpieces seem to be more sensitive to the removal of material during cutting [20][21][22]. In addition, the thinwalled tubular workpiece subjected to external forces generally vibrates in combination of the beam and shell modes [23].…”

Section: Introductionmentioning

confidence: 99%

Experimental Study on Entropy Features in Machining Vibrations of A Thin-walled Tubular Workpiece

Wang

Chen

et al. 2023

JDMD

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In machining processes, chatter vibrations are always regarded as one of the major limitations for production quality and efficiency. Accurate and timely monitoring of chatter is helpful to maintain stable machining operations. At present, most chatter monitoring methods are based on the energy level at specified chatter frequencies or frequency bands. However, the spectral features of chatter could change during machining operations due to complexity and time-varying dynamics of the physical machining process. The purpose of this paper is to investigate the time-varying chatter features in turning of thin-walled tubular workpieces from the perspective of entropy. The airborne acoustics was selected as the source of information for machining condition monitoring. First, corresponding to the distinguishing surface topographies relevant to machining conditions, the features of the sound signal emitted during turning of the thin-walled cylindrical workpieces were extracted using the spectral analysis and wavelet packet transform, respectively. It was shown that the dominant vibration frequency as well as the energy distribution could shift with the transition of the machining status. After that, two relative entropy indicators based on the spectrum and the wavelet packet energy were constructed to identify chattering events in turning of the thin-walled tubes. The experimental results demonstrate that the proposed indicators could accurately reflect the transition of machining conditions with high sensitivity and robustness in comparison with the traditional FFT-based methods. The achievement of this study lays the foundations of the online chatter monitoring and control technique for turning of the thin-walled tubular workpieces.

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Section: Introductionmentioning

confidence: 99%

Experimental Study on Entropy Features in Machining Vibrations of A Thin-walled Tubular Workpiece

Wang

Chen

et al. 2023

JDMD

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“…At the same time, it will lead to the elastic deformation of the cutting processing system which is composed of the chuck, the cutting tool and work-piece. Furthermore, it may cause the vibration, especially the regenerative vibration, under certain conditions [1,2]. In recent years, the optimization of the cutting parameter becomes the hotspots of researching the machine tool dynamic characteristics.…”

Section: Introductionmentioning

confidence: 99%

Cutting Parameter Optimization of Stability in Cylindrical Shell Based on Particle Swarm Algorithm

Chen

Lin

Han

et al. 2013

AMR

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For cylindrical shell, because of its structure characteristic (i.e. long and thin-walled), it has low stiffness, bad fabrication procedure. And it’s very easy to cause vibration in the cutting process, especially the type of regenerative vibration. So, it’s vital for the surface quality of work-piece and cutting stability to select cutting parameter reasonably. The paper proposed a dynamic optimization method, which aimed at maximization of material removal rate. This method could guarantee the maximum material removal rate under the condition of cutting stability based on Particle Swarm Algorithm (PSA). In the end, it verified the optimization results by the experiments.

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“…However, considering the high computational cost associated with using direct integration, the number of points is kept to a minimum, and hence the discrete nature of the spectrum in Figure 2. For a clamped with a three jaw chuck, Lai et al [23] reported that for thin wall casings different modes get excited as the position of the tool changes with respect to the jaw location. However, in the present case the bottom of the thin wall can be considered to be uniformly clamped all around the circumference due to the rigid hub and flange at the bottom.…”

Section: Finite Element Analysismentioning

confidence: 99%

“…With an increase in this ratio, the compliance of shell mode increases and hence is easily excited when compared to beam mode. Lai et al [23] studied the stability characteristics while turning a thin walled cylindrical workpiece clamped by a three jaw chuck. They reported that the vibration properties such as stiffness coefficient and vibration direction angle of beam and shell modes change with the relative position of the cutting tool to the chucking jaw.…”

mentioning

confidence: 99%

Vibration suppression and coupled interaction study in milling of thin wall casings in the presence of tuned mass dampers

Kolluru

Axinte

Raffles

et al. 2013

Proceedings of the Institution of Mechanical Engineers, Part B:

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Damping of machining vibrations in thin walled structures is an important area of research due to the ever-increasing use of lightweight structures such as jet engine casings. Previous work reported in the literature has focussed on passive and active damping solutions for simple planar thin walls; whereas vibration damping in thin wall ring type casings was not reported. Moreover, implementation of any of these solutions on an industrial scale component needs proven simulation tools for validation. In this work, a passive damping solution in the form of tuned viscoelastic dampers is studied to minimise the vibration of thin walled casings. The implementation of tuned dampers was driven by a specific characteristic observed for the casing under study where a couple of modes dominate the dynamic response. Finite element simulation studies are carried out for a casing both with and without passive dampers, and are validated using machining tests and experimental modal tests. The finite element predictions are found to match with experimental results with reasonable accuracy.

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Stability analysis of chatter vibration for a thin-wall cylindrical workpiece

Cited by 14 publications

References 1 publication

Experimental Study on Entropy Features in Machining Vibrations of A Thin-walled Tubular Workpiece

Experimental Study on Entropy Features in Machining Vibrations of A Thin-walled Tubular Workpiece

Cutting Parameter Optimization of Stability in Cylindrical Shell Based on Particle Swarm Algorithm

Vibration suppression and coupled interaction study in milling of thin wall casings in the presence of tuned mass dampers

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