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Modelling the dynamics of a large damped boring bar in a lathe.
Sandvik Coromant Trondheim AS, NOR.
2019 (English)In: Procedia CIRP, Elsevier B.V. , 2019, Vol. 82, p. 285-289Conference paper, Published paper (Refereed)
Abstract [en]

Boring bars with tuned mass dampers have a passive damper tuned with respect to the frequency of the first bending mode of the tool. When the tool is clamped into the machine tool there is a stiffness loss that lowers the natural frequency of the bar compared to ideal clamping conditions. For large tools the difference can be more than 35%, depending on clamping structure, tool size and overhang. In this paper we investigate a simple two-degree-of-freedom model for the tool-machine interaction consisting of a bending mode coupled with a rotational stiff mode. The model gives good insight into the system behavior and fits well with measurements. © 2019 The Authors. Published by Elsevier B.V. Peer-review under responsibility of the scientific committee of The 17th CIRP Conference on Modelling of Machining Operations

Place, publisher, year, edition, pages
Elsevier B.V. , 2019. Vol. 82, p. 285-289
Series
Procedia CIRP ; 82
Keywords [en]
Internal turning, Tool clamping, Tuned mass damper, Acoustic devices, Degrees of freedom (mechanics), Vibration control, Bending modes, Clamping conditions, Passive dampers, Stiffness loss, System behaviors, Tool machines, Tuned mass dampers, Two-degree-of-freedom models, Machining centers
National Category
Other Mechanical Engineering
Identifiers
URN: urn:nbn:se:bth-18636DOI: 10.1016/j.procir.2019.04.041Scopus ID: 2-s2.0-85070437675OAI: oai:DiVA.org:bth-18636DiVA, id: diva2:1350102
Conference
17th CIRP Conference on Modelling of Machining Operations, CIRP CMMO, Sheffield, 13 June 2019 through 14 June 2019
Available from: 2019-09-10 Created: 2019-09-10 Last updated: 2019-09-10Bibliographically approved

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Magnevall, Martin
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