Damping investigation in boring bar using hybrid copper-zinc particles

Chockalingam, S.; Natarajan, U.; Cyril, A. George

doi:10.1177/1077546315610946

Cited by 26 publications

(4 citation statements)

References 11 publications

(17 reference statements)

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“…As the impact and friction dampers placed on the surface of the boring tool cause damage to the machined surface resulting in reduced surface roughness and tool life. Biju Shunmugam [19], Chockalingam et al [20] and Diniz et al [21] developed boring bar with particle impact dampers (PIDs), where particles placed inside the cavity of the tool for stability improvement by controlling the vibrations in internal turning. The momentum was transferred from the primary system to particles, and increased energy dissipation caused by the collision of the particles and cavity walls minimized the boring bar's vibrations.…”

Section: Introductionmentioning

confidence: 99%

Investigation of stability in internal turning using a boring bar with a passive constrained layer damping

Yuvaraju¹,

Nanda²,

Srinivas³

2021

FME Transactions

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The vibrations produced in a boring tool in internal turning deteriorate the machined surface quality and reduce the tool life, which results in a massive noise during the machining. Therefore, unwanted vibrations are necessary to be eliminated by improving the boring bar's dynamic stiffness and damping capacity. This paper investigates a passive constrained layer damping (CLD) boring bar with a hybrid damping layer to study the internal turning system's stability. Initially, the dynamic models of the conventional and CLD tools are thoroughly studied using Euler-Bernoulli beam theory (EBT) and validated them with finite element modelling (FEM). The frequency response functions (FRFs) obtained from the impact hammer tests are used to estimate the modal parameters. With modal parameters, the semi-analytical stability lobe diagrams (SLDs) are plotted for the boring system with the conventional and CLD boring bar. Tool-tip responses for various cutting conditions are simulated numerically to validate and to study stability. The cutting experiments with traditional and CLD boring bar are conducted for stability analysis and compared tool-tip responses with numerical results. It is observed that both the numerical and experimental results agree with the selected cutting conditions from SLDs. It is also observed that the CLD boring bar with a hybrid damping layer reduced the vibration displacements by five times compared to the conventional one.

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Section: Introductionmentioning

confidence: 99%

Investigation of stability in internal turning using a boring bar with a passive constrained layer damping

Yuvaraju¹,

Nanda²,

Srinivas³

2021

FME Transactions

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“…The stability lobes were shifted to the left side when the applied voltage increases. Further, Chockalingam et al (2017) used hybrid copper-zinc particles to suppress chatter in boring operation and observed an improvement in damping characteristics compared to the unmodified tool.…”

Section: Introductionmentioning

confidence: 99%

Optimal cutting state predictions in internal turning operation with nano-SiC/GFRE composite layered boring tools

Yuvaraju

Nanda

Srinivas

2021

IJMMM

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This paper presents passive vibration control methodology in internal turning process with the use of hybrid nanocomposite coatings (nano-SiC/GFRE) on the surface of boring bar. Natural frequencies and damping ratio of different composition tool holders are obtained experimentally using impact hammer test. Three different configuration considered are: conventional (tool holder 1); nano-SiC/GFRE with 1% SiC (tool holder 2); and nano-SiC/GFRE with 2% SiC (tool holder 3). A better damping ability is noticed in third configuration of tool holder compared to others. Furthermore, using single mode data, analytical stability lobe diagrams are constructed for all three tool holders. Moreover, Box-Behnken design (BBD) is adopted and a set of fifteen experiments are performed with each tool holder. For third configuration of tool holder, effect of input variables on the surface roughness and tool vibration amplitudes is studied using neural network model. Finally, the neural network regression model is employed as a function estimation tool in simulated annealing for obtaining optimal cutting conditions.

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“…The passively damped boring bar is modeled as a cantilevered Euler-Bernoulli beam with constant cross-sectional properties, in which a tuned mass damper (TMD) is embedded for the purpose of chatter suppression. The authors in paper [23] describe the technique of particle damping in a boring process. The granular particles are packed with the single particle type used to suppress chatter.…”

Section: Introductionmentioning

confidence: 99%

Modeling of Boring Mandrel Working Process with Vibration Damper

et al. 2020

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The article considers the issue of modeling the oscillations of a boring mandrel with vibration damper connected to the mandrel with a viscoelastic coupling. A mathematical model of the boring mandrel oscillations, machine support and inertial body (damper) is developed in the form of a differential equations system. The model is made in the form of a four-mass system of connected bodies. The solution to the differential equations system was found using the finite difference method, as well as the operator method with the use of the Laplace transform. As the simulation result, it was found that the use of vibration damper can significantly reduce the amplitude of the boring mandrel natural vibrations when pulsed, and also significantly reduce the forced vibrations amplitude when exposed to periodic disturbing forces. The developed mathematical model and algorithms for the numerical solution to the differential equations allowed us to choose the optimal parameters of the boring mandrel damping element. The obtained data will be used to create a prototype boring mandrel and conduct field tests.

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Damping investigation in boring bar using hybrid copper-zinc particles

Cited by 26 publications

References 11 publications

Investigation of stability in internal turning using a boring bar with a passive constrained layer damping

Investigation of stability in internal turning using a boring bar with a passive constrained layer damping

Optimal cutting state predictions in internal turning operation with nano-SiC/GFRE composite layered boring tools

Modeling of Boring Mandrel Working Process with Vibration Damper

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