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Proponowane metody optymalizacji organizacji bezpiecznej pracy w procesach montażowych w przemyśle lotniczym

Bociąg Artur, Dąbrowski Mariusz

Przegląd Techniczny : Gazeta Inżynierska

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2020

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nr 1

14--19

PL

Procesy montażowe, w których stosuje się technologie nitowania, klejenia lub zgrzewania są niezwykle istotną, ze względów technologicznych i jakościowych, i odpowiedzialną częścią produkcji statków powietrznych. Realizacja tych procesów powoduje charakterystyczne, wręcz typowe dla tego przemysłu, zagrożenia, dla pracowników, zwłaszcza zagrożenia mechaniczne, hałas i drgania a także znaczne uciążliwości wynikające z niewygodnej pozycji ciała i utrudnionego dostępu do miejsc łączenia, czy też narażenia na czynniki chemiczne ze względu na zastosowanie substancji chemicznych służących do zapewnienia szczelności połączeń. W artykule omówiono typowe wypadki oraz zagrożenia i uciążliwości występujące w procesach łączenia stosowanych w przemyśle lotniczym. Omówiono proponowane metody optymalizacji organizacji bezpiecznej pracy w procesach montażowych określone na podstawie prowadzonych badań.

EN

Processes of joining aircraft structures and materials, which apply riveting, adhesive bonding or thermal welding are very important, for technological and qualitative reasons, part of aircraft production. Realization of these processes produces specific (typical for this industry) hazards for workers. The most important among them are mechanical hazards, noise and vibrations. There are also present considerable arduousnesses results from inconvenient work posture and difficult reach the access points, or exposure to chemical agents due to the use of chemicals to ensure the tightness of connections, or exposure to chemical agents due to the use of chemicals to ensure the tightness of connections. The paper reviews typical accidents as well as hazards and arduousnesses which are present in processes of joining in aircraft industry. Proposed methods of optimization of safe work organization in assembly processes, determined on the basis of conducted research, are discussed.

2

Nowe technologie łączenia tarciowego metali

Kocańda D., Górka A.

Biuletyn Wojskowej Akademii Technicznej

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2010

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Vol. 59, nr 2

395-411

PL

W pracy w znacznym skrócie przedstawiono aktualny stan wiedzy na temat dynamicznie rozwijanych w ostatnich latach nowych technologii wykorzystujących proces łączenia tarciowego materiałów. Omówiono metody: FSP (Friction Stir Processing) i FSW (Friction Stir Welding). Skoncentrowano się na tych zastosowaniach omawianych metod, w których zaobserwowano znaczny wzrost wytrzymałości zmęczeniowej i odporności korozyjnej konstrukcyjnych materiałów nośnych.

EN

The state-of-the art in the field of new manufacturing technologies developed in the last years, which are based on friction stir welding/processing of materials (FSP and FSW), is the subject of the paper. The main attention was focused on the application of these techniques in surface engineering which lead to materials and products with higher performance, higher fatigue strength, and corrosion toughness.

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The temperature - and stress fields of valves of IC engine

Jaskólski J., Krzyżak R.

Journal of KONES

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2007

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Vol. 14, No. 3

245-252

EN

The paper concerns building up one exhaust valve of composite-steel and two intake ceramics-steel valves of a hypothetical adiabatic engine. The input temperatures were computed using three diverse FORTRAN95 programs, solving a shortened optical integral equation with radiative transfer, transient differential equation while starting and switching off the engine and a rod like diff. Equation with 'progonka' (Thomas) solution. The ANSYS11 programme was fed up with the output of the programs. It turns out that, generally, a mineralogical, crystal-chemical approach to the joining of materials results in stresses known from the common metal engines. Such problems as CTE enhancing (partly hypothetical) by means of doping the anionic compounds by cationic ones, swelling of structures, compressibility versus coefficient of thermal expansion (CTE) , compatibility of crystal motifs while joining, thermal shock resistance, switching the bonds, mechanical longevity, radiation protection etc were addressed. It turns out that true nature of the temperature and stress field, especially of the exhaust valve is closer to the FORTRAN temperature computation than, e.g. From the heat film coefficients (ANSYS11).

4

A thermomechanical aspect of the ceramic-capped piston of hypothetical adiabatic diesel engine

Jaskólski J., Krzyżak R.

Journal of KONES

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2006

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Vol. 13, No. 2

169-177

EN

The paper concerns a hypothetical Al.-alloy piston coated (capped) first by labradore and then capped by YSZ. The labradore, a member of the feldspar group is deemed thermal-shock resistant, the YSZ(PSZ) can be shock-resistant, but the outcome of the two with the Al.-alloy is not known. The analysis were made in two ways by ANSYS 10.0, as wholly isotropic materials and (second) labradore treated as wholly orthotropic one as basing on a designed texture. The above programme was fed up by the FORTRAN95-outcome of temperatures and the other B.C.’s.The temperatures between the ceramics and the alloy (except one node!!, the FORTRAN) are ( from the above two procedures), 222.63 to 270-300 graduate C, at the first groove are about 290 graduate C, and, surely lower (orthotropic). The relatively low (to ceramic) inner tensile stresses are embraced by the compressive ones from all the sides. The only problem is the-alloy bearing capacity at some sections at the ceramic boundary (and only there). But, it was the aim of the work to stick ceramics there.The dangerous stresses can occur at the pin .The ‘orthotropic ‘ results are better than the ‘iso’-ones and more true.. Taking into account that the real loading will be lower (porosity of the ceramics, the mass and the possible subtraction of stresses, i.e. those ceramic-production-confined ones) , the laboratory production of the piston appears worth.