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Title
Finite element analysis of the dynamically created portal in the huge machine tool of “travelling column” type

ISSN printed: 1733-8670, ISSN on-line: 2392-0378
Dounar, Stanislau1; Iakimovitch, Alexandre2; Jakubowski, Andrzej3
URI: https://repository.am.szczecin.pl/handle/123456789/2658
2021-03-31
In this paper, a special configuration for the huge multipurpose machine tool of “travelling column” type was investigated by the finite element analysis. Internal degrees of freedom of a bulky system consisting of the ram, stock, column, sledge and bed, were implemented by the hydrostatic guides. A simulation of coupling two assembled columns into the portal structure was completed. The results of this work showed that temporal joining raises the spindle static rigidity by 1.39–1.91 times depending on the direction (mostly longitudinal – along the X-axis). The simulation also revealed the robustness of a whole-machine resonance pattern (11.7–39.0 Hz) to “column–to–portal coupling”. Eight types of eigenmodes were analyzed for frequency intervals from 0 to 80 Hz. A decrease by 2.9 times of the resonance peaks of a frequency response function was observed in the case of a portal structure creation. In case of columns-to-portal transition, stable cutting just at resonance frequencies (resonance overriding) becomes allowable. Overall, the “Portal” structure is recommended for intermittent cutting machining by raised high spindle unit at frequencies below 40 Hz.
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Title

Finite element analysis of the dynamically created portal in the huge machine tool of “travelling column” type

Pages

Figures

7

Tables

2

ISSN printed

1733-8670

ISSN on-line

2392-0378

DOI

10.17402/458

Type

Original scientific article

Journal

65 Scientific Journals of the Maritime University of Szczecin, no. 65 / 2021

Publisher

Scientific Journals Maritime University of Szczecin, Zeszyty Naukowe Akademia Morska w Szczecinie

Copyright Holder

Scientific Journals Maritime University of Szczecin, Zeszyty Naukowe Akademia Morska w Szczecinie

Published

2021-03-31

Recieved

2019-10-22

Accepted

2021-03-01

Funding

No data

Keywords

FEA, portal, travelling column, rigidity, resonance, torsion

URI:

https://repository.am.szczecin.pl/handle/123456789/2658

Language

English

Authors

Dounar, Stanislau1; Iakimovitch, Alexandre2; Jakubowski, Andrzej3

Affiliation

1 Belarusian National Technical University, Mechanical Engineering Faculty Nezalezhnasci 65, 220127 Minsk, Belarus, a.jakubowski@am.szczecin.pl
2 Belarusian National Technical University, Mechanical Engineering Faculty Nezalezhnasci 65, 220127 Minsk, Belarus, a.jakubowski@am.szczecin.pl
3 Maritime University of Szczecin, Faculty of Marine Engineering Waly Chrobrego 1-2, 70-500 Szczecin, Poland, a.jakubowski@am.szczecin.pl

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