Passive Damping Techniques for Vibration Suppression in Boring Operation with Long Overhangs

Thomas, W Kenny; Zsombor, Fülöp; Szilágyi, Attila

doi:10.1007/978-981-15-9529-5_22

Cited by 4 publications

(1 citation statement)

References 13 publications

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“…This paper aims to contribute to the understanding of how the dynamic stability of internal turning tools for long overhangs can influence machining vibration. To achieve this goal, four different boring bar configurations will be discussed, including the standard boring bar, a carbide boring bar with a higher Young's modulus than the standard one, and two anti-vibration tools with different passive damper mechanisms: the Silent tool, that acts as a tuned mass damper (TMD) system and the Impact Damper (ID) boring bar that modifies the linear momentum of the balls during multiple inelastic collisions inside the tool's cavity [36]. An experimental investigation is conducted to measure the dynamic stability of these tool configurations under identical test conditions, including cutting parameters, clamping system, workpiece material, insert, measurement procedure, and data collection.…”

Section: Introductionmentioning

confidence: 99%

Experimental Research on the Dynamic Stability of Internal Turning Tools for Long Overhangs

Silva

Peterka

Vopát

2023

JMMP

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The roughness origin of machined surfaces is caused by the following physical causes: the copying of the shape and the roughness of the cutting part of the tool into the workpiece, the existence of vibration of the tool, and the existence of the build-up edge (BUE) on the cutting edge. The current work aims to analyze the vibration amplitude of tools. The roughness of the machined surfaces was observed on hardened steel workpieces. Internal turning technology was used, and we used several different boring bars (steel; carbide; tuned mass damper—TMD; impact damper—ID) and an internal turning operation using CBN inserts. We revealed the tool’s slenderness coefficient (TSC) values for stable cutting operations. For the steel holder, the value is TSC ≤ 4.25; for the carbide holder, the value is TSC ≤ 5.5; for the TMD holder, the value is 4.5 ≤ TSC ≤ 7.75; and for the ID holder, the value is TSC ≤ 8. The surface’s roughness was practically unchanged within the limits of stable machining. However, if the tools exceed the presented stable limits, vibration and roughness parameters deteriorate significantly; an example parameter (Ra) deteriorated from 0.350 μm to 1.832 μm.

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Section: Introductionmentioning

confidence: 99%

Experimental Research on the Dynamic Stability of Internal Turning Tools for Long Overhangs

Silva

Peterka

Vopát

2023

JMMP

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Investigation of Damping Characteristics on Copper-Based Shape Memory Alloy Frictional Damper in Boring Process

Chockalingam

Prasannavenkadesan

Ramu³

et al. 2021

Arab J Sci Eng

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Analysis of form Error and Roughness of Hardened Steel Workpieces Internally Turned with Different Tools in Long Overhangs

Peterka

Silva

Straka

et al. 2022

Research Papers Faculty of Materials Science and Technology Slovak University of Technology

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Internal turning process is a very important and widely used process for enlarging and finishing holes. Especially for the components that work with external members, this operation needs to assure surface and geometric quality. In that case, the correct definition of working parameters will directly contribute to the quality of component. Aim of the current research was to analyse the form error and the roughness of workpieces submitted to internal turning process using boring bars in long overhangs with three different internal tools (steel, carbide and antivibrating tool). For the experiments, heat-treated DIN EN 1.2842 (ISO 90MnCrV8) steel with 58 HRC of hardness was submitted to boring process using CBN (cubic boron nitride) inserts, and a boring bar with the most possible rigid clamping system (Easy Fix). The workpiece roughness and circularity were measured using a profilometer and a form error measuring machine. The measurements provided the data to identify the boring bar levels of stability, and the workpiece micro and macro geometric errors. The experiments allowed to conclude that, for all toolbars, the evaluated errors kept constant with increasing L/D ratio during stable clamping conditions, without any vibration. On the other hand, higher values of overhangs, limited to L/D>4.25 for steel tool, can cause serious damages in the cutting system if the antivibration tools or the carbide will be not used.

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Passive Damping Techniques for Vibration Suppression in Boring Operation with Long Overhangs

Cited by 4 publications

References 13 publications

Experimental Research on the Dynamic Stability of Internal Turning Tools for Long Overhangs

Experimental Research on the Dynamic Stability of Internal Turning Tools for Long Overhangs

Investigation of Damping Characteristics on Copper-Based Shape Memory Alloy Frictional Damper in Boring Process

Analysis of form Error and Roughness of Hardened Steel Workpieces Internally Turned with Different Tools in Long Overhangs

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