- Tytuł:
- Finite element analysis of the dynamically created portal in the huge machine tool of “travelling column” type
- Autorzy:
-
Dounar, Stanislau
Iakimovitch, Alexandre
Jakubowski, Andrzej - Powiązania:
- https://bibliotekanauki.pl/articles/1818876.pdf
- Data publikacji:
- 2021
- Wydawca:
- Akademia Morska w Szczecinie. Wydawnictwo AMSz
- Tematy:
-
FEA
portal
travelling column
rigidity
resonance
torsion
pecking - Opis:
- 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.
- Źródło:
-
Zeszyty Naukowe Akademii Morskiej w Szczecinie; 2021, 65 (137); 29-37
1733-8670
2392-0378 - Pojawia się w:
- Zeszyty Naukowe Akademii Morskiej w Szczecinie
- Dostawca treści:
- Biblioteka Nauki
Artykuł