Analysis of Dynamic Properties of Boring Bars Concerning Different Clamping Conditions

Document type: Researchreports
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Author(s): Henrik Åkesson, Tatiana Smirnova, Thomas L Lagö, Lars Håkansson
Title: Analysis of Dynamic Properties of Boring Bars Concerning Different Clamping Conditions
Series: Research Report
Year: 2007
Issue: 6
ISSN: 1103-1581
Organization: Blekinge Institute of Technology
Department: School of Engineering - Dept. of Signal Processing (Sektionen för teknik – avd. för signalbehandling)
School of Engineering S- 372 25 Ronneby
+46 455 38 50 00
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Language: English
Abstract: The boring bar is one of the most widely used type of tool holders in metal cutting operations. The turning process subjects the tool to vibrations, and cutting in deep workpiece cavities is likely to result in high vibration levels. The consequences of such vibration levels generally results in: reduced tool life, poor surface finishing and disturbing sound. Internal turning frequently requires a long and slender boring bar in order to machine inside a cavity, and the vibrations generally become highly correlated with one of the fundamental bending modes of the boring bar. Different methods can be applied to reduce the vibrations, the implementation of the most efficient and stable methods require in depth knowledge concerning the dynamic properties of the tooling system.
Furthermore, the interface between the boring bar and the clamping house has a significant influence on the dynamic properties of the clamped boring bar. This report focuses on the dynamic properties of a boring bar that arise under different clamping conditions of the boring bar and are introduced by a clamping house (commonly used in the manufacturing industry). The dynamic properties of a boring bar (for different cases of boundary condition of the boring bar) are presented partly analytically but also experimentally.
Subject: Signal Processing\Active Noise and Vibration Control
Mechanical Engineering\Structural Dynamics
Keywords: Modal Analysis, Clamping, Boundary Condition
URN: urn:nbn:se:bth-00359