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Magnevall, Martin
Publications (3 of 3) Show all publications
Eynian, M., Magnevall, M., Cedergren, S., Wretland, A. & Lundblad, M. (2018). New methods for in-process identification of modal parameters in milling. Paper presented at 8th CIRP Conference on High Performance Cutting, HPC 2018; Budapest; Hungary; 25 June 2018 through 27 June 2018. Procedia CIRP, 77, 469-472
Open this publication in new window or tab >>New methods for in-process identification of modal parameters in milling
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2018 (English)In: Procedia CIRP, ISSN 2212-8271, E-ISSN 2212-8271, Vol. 77, p. 469-472Article in journal (Refereed) Published
Abstract [en]

Chatter vibrations encountered in machining can degrade surface finish and damage the machining hardware. Since chatter originates from unstable interaction of the machining process and the machining structure, information about vibration parameters of the machining structure should be used to predict combinations of cutting parameters that allow stable machining. While modal test methods, for example those with impact hammers, are widely used to identify structural parameters; the need for sophisticated test equipment is prohibitive in their use. Furthermore, dynamic properties of critical components of a machine tool may change as they get affected by cutting loads, material removal and spindle rotation. Recently few algorithms have been proposed that identify the in-process dynamic parameters by frequency measurements, thus avoiding these problems. In this paper, some of these algorithms are reviewed and their capabilities and limitations in processing am experimental data set are compared and discussed. © 2018 The Authors. Published by Elsevier Ltd.

Keywords
Data handling; Equipment testing; Machine components; Machine tools; Milling (machining); Modal analysis, Chatter; Chatter vibrations; Critical component; Cutting parameters; Frequency measurements; In-process; Structural parameter; Vibration parameters, Parameter estimation
National Category
Applied Mechanics Manufacturing, Surface and Joining Technology
Research subject
ENGINEERING, Manufacturing and materials engineering; Production Technology
Identifiers
urn:nbn:se:hv:diva-13202 (URN)10.1016/j.procir.2018.08.269 (DOI)2-s2.0-85057398424 (Scopus ID)
Conference
8th CIRP Conference on High Performance Cutting, HPC 2018; Budapest; Hungary; 25 June 2018 through 27 June 2018
Funder
Knowledge Foundation
Available from: 2018-12-19 Created: 2018-12-19 Last updated: 2019-05-24Bibliographically approved
Parsian, A., Magnevall, M., Beno, T. & Eynian, M. (2017). Sound Analysis in Drilling, Frequency and Time Domains. Paper presented at 16th CIRP Conference on Modelling of Machining Operations, CIRP CMMO 2017; Cluny; France; 15 June 2017 through 16 June 2017. Procedia CIRP, 58, 411-415
Open this publication in new window or tab >>Sound Analysis in Drilling, Frequency and Time Domains
2017 (English)In: Procedia CIRP, ISSN 2212-8271, E-ISSN 2212-8271, Vol. 58, p. 411-415Article in journal (Refereed) Published
Abstract [en]

This paper proposes a guideline for interpreting frequency content and time history of sound measurements in metal drilling processes. Different dynamic phenomena are reflected in generated sound in cutting processes. The footprint of such phenomena including torsional, lateral regenerative chatter and whirling in sound measurement results are discussed. Different indexable insert drills, at several cutting conditions, are covered. The proposed analysis could be used for studying, online monitoring and controlling of drilling processes. © 2017 The Authors.

Keywords
Acoustic variables measurement; Architectural acoustics; Drilling; Machining centers; Vibration analysis, Chatter; Cutting conditions; Frequency and time domains; Frequency contents; Indexable inserts; Regenerative chatters; Sound analysis; Vibrations, Time domain analysis
National Category
Manufacturing, Surface and Joining Technology
Research subject
ENGINEERING, Manufacturing and materials engineering
Identifiers
urn:nbn:se:hv:diva-11907 (URN)10.1016/j.procir.2017.03.242 (DOI)2-s2.0-85029768891 (Scopus ID)
Conference
16th CIRP Conference on Modelling of Machining Operations, CIRP CMMO 2017; Cluny; France; 15 June 2017 through 16 June 2017
Funder
Knowledge Foundation
Note

Available online 31 May 2017

Available from: 2017-12-14 Created: 2017-12-14 Last updated: 2019-05-21Bibliographically approved
Östling, D. & Magnevall, M. (2016). Modelling and characterization of nonlinearities in a tuned mass damper-impulse hammer versus shaker excitation. In: Sas P.,Moens D.,van de Walle A. (Ed.), Proceedings of ISMA 2016 - International Conference on Noise and Vibration Engineering and USD2016 - International Conference on Uncertainty in Structural Dynamics: . Paper presented at 27th International Conference on Noise and Vibration Engineering, ISMA 2016 and International Conference on Uncertainty in Structural Dynamics, USD2016; Leuven; Belgium; 19 September 2016 through 21 September 2016 (pp. 3711-3719). KU Leuven, Departement Werktuigkunde
Open this publication in new window or tab >>Modelling and characterization of nonlinearities in a tuned mass damper-impulse hammer versus shaker excitation
2016 (English)In: Proceedings of ISMA 2016 - International Conference on Noise and Vibration Engineering and USD2016 - International Conference on Uncertainty in Structural Dynamics / [ed] Sas P.,Moens D.,van de Walle A., KU Leuven, Departement Werktuigkunde , 2016, p. 3711-3719Conference paper, Published paper (Refereed)
Abstract [en]

The rubber springs of a tuned mass damper (TMD) exhibit both nonlinear stiffness and damping, which complicates measurements of the frequency response function (FRF) of the device. In this paper we model and compare the frequency responses measured with both impulse hammer excitation and a shaker base excitation method. Since the impulse response will spend only a short time in the nonlinear regime, a reasonable assumption is that the nonlinearities will be less apparent and more difficult to determine. The results show that this is not the case and that both methods yield similar nonlinear parameters. By comparing responses at different excitation levels with appropriate nonlinear models, the nonlinearities can be determined. The results indicate that these approximations of the nonlinear effects are able to describe the dynamic behaviour of the TMD, and that the nonlinear properties of the material differ somewhat in the two measurement situations.

Place, publisher, year, edition, pages
KU Leuven, Departement Werktuigkunde, 2016
Keywords
Acoustic devices; Frequency response; Hammers; Impulse response; Nonlinear analysis; Rubber products; Structural dynamics, Base excitation methods; Dynamic behaviours; Frequency response functions; Non-linear parameters; Non-linear regimes; Non-linear stiffness; Nonlinear properties; Tuned mass dampers, Nonlinear optics
National Category
Manufacturing, Surface and Joining Technology
Research subject
ENGINEERING, Manufacturing and materials engineering
Identifiers
urn:nbn:se:hv:diva-10935 (URN)2-s2.0-85018187141 (Scopus ID)9789073802940 (ISBN)
Conference
27th International Conference on Noise and Vibration Engineering, ISMA 2016 and International Conference on Uncertainty in Structural Dynamics, USD2016; Leuven; Belgium; 19 September 2016 through 21 September 2016
Available from: 2017-05-15 Created: 2017-05-15 Last updated: 2018-09-17Bibliographically approved
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