Temat: calculation error - Katalog OPAC zbiorów

Skocz do pozycji: 1.

Tytuł:: Decreasing of thermal errors in a lathe by forced cooling of ball screws and a headstock
Autorzy:: Winiarski, Z.
Kowal, Z.
Błażejewski, A.
Powiązania:: https://bibliotekanauki.pl/articles/1429161.pdf
Data publikacji:: 2008
Wydawca:: Wrocławska Rada Federacji Stowarzyszeń Naukowo-Technicznych
Tematy:: lathe
feed mechanism
cooling
thermal error
calculation
Opis:: The goal of this paper is to present the effective methods of decreasing thermal deformations of a turning centre's structure in order to reduce the thermal error. The design of a machine tool as well as the scope of analyses are described, and calculation methods are specified. The paper also presents the results of computer simulations, concerning studies on the influence of type and parameters of a headstock-cooling liquid on the reduction of spindle displacements. Moreover, the results of feed mechanism's thermal studies are shown, describing the influence of heat generated during the operation of ball screws and their inner liquid cooling, on tool's thermal displacements.
Źródło:: Journal of Machine Engineering; 2008, 8, 4; 122-130
1895-7595
2391-8071
Pojawia się w:: Journal of Machine Engineering
Dostawca treści:: Biblioteka Nauki

Artykuł

Skocz do pozycji: 2.

Tytuł:: Improving the Accuracy of Fatigue Damage Calculations for Archived Data
Autorzy:: Leski, Andrzej
Powiązania:: https://bibliotekanauki.pl/articles/97861.pdf
Data publikacji:: 2019
Wydawca:: Sieć Badawcza Łukasiewicz - Instytut Lotnictwa
Tematy:: fatigue damage
nz
aircrafts
recorders
calculation
cycles
error
Opis:: Historical operational usage data give a ground for fatigue damage estimation. Quality of sensors and recorders two or more decades ago were lower then modern one. Lack of resolution in nz-level measurement and recording leads to some errors in fatigue damage calculations. In this paper author propose a method to improve the accuracy of fatigue damage calculations for archived data. The method takes advantage of typical distribution of accumulated cycles for aircrafts. Small correction in representative nz value taken in calculations can reduce the error in fatigue damage assessment.
Źródło:: Fatigue of Aircraft Structures; 2019, 11; 113-120
2081-7738
2300-7591
Pojawia się w:: Fatigue of Aircraft Structures
Dostawca treści:: Biblioteka Nauki

Artykuł

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