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Tytuł:
A demonstrative prototype of aeronautical dual-power path gear unit
Autorzy:
Budzik, G.
Powiązania:
https://bibliotekanauki.pl/articles/247271.pdf
Data publikacji:
2011
Wydawca:
Instytut Techniczny Wojsk Lotniczych
Tematy:
aeronautical gears
toothed wheels
aeronautical power drives
Opis:
The paper presents a process of designing, modelling and manufacturing of a demonstrative prototype of a dual-power path gear unit to be applied in aeronautical systems of drive transmission. The process of making a demonstrator of a dual-power path gear unit by means of 3D-CAD modelling and Rapid Prototyping has been described here. Designing gears is based on Computer Aided Design (CAD), Computer Aided Engineering (CAE), Computer Aided Manufacturing (CAM) systems including also Rapid Prototyping (RP). The first stage of the designing process of a gear unit is always defining basic parameters of gear work (among others; power, rotational speed, transmission ratio) depending on the unit's predestination. On the basis of the above, the calculation of main constructional parameters is carried out. Subsequently, it is possible to make 3D-CAD models of toothed wheels and the remaining parts of the gear unit. In case of designing demonstrative prototypes, it is important to take into consideration the assumptions of modelling similarity to a real gear unit. 3D-CAD systems are often equipped with modules for analysing geometrical parameters and cooperation of individual parts of the unit for example the area of contact. A detailed analysis of cooperation of gear parts of the unit allows for detecting models' faults early and for deleting them. After making 3D-CAD models one can approach to creating a prototype by means of Rapid Prototyping methods. It is necessary to prepare the numerical data essential as a subsequent stage of the process of making the demonstrator. On that basis the individual parts of the gear unit are made in an incremental process. The accuracy of creating a physical prototype depends mainly on the accuracy of a 3D-CAD/3D-RP model prepared in a process of processing numerical data. A demonstrator described in the paper has been made by means of FDM method. The prototype allowed for analysing constructional solutions of gear units on a physical model and for preparing assumptions for introductory stand tests.
Źródło:
Journal of KONES; 2011, 18, 4; 41-46
1231-4005
2354-0133
Pojawia się w:
Journal of KONES
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Possibilities of using vacuum casting process for manufacturing cast models of turbocharger impellers
Autorzy:
Budzik, G.
Powiązania:
https://bibliotekanauki.pl/articles/243370.pdf
Data publikacji:
2007
Wydawca:
Instytut Techniczny Wojsk Lotniczych
Tematy:
turbocharger impeller
rapid prototyping systems
vacuum casting
Opis:
Possibilities of producing cast models of turbocompressor impellers in silicon matrices by vacuum casting process are presented. Vacuum casting process enables producing cast models of impellers for precision casting. A standard model for silicon matrix making is a prototype produced with stereo lithography technique. The advantage of stereo lithographic model is its easy machinability that enables higher quality of impeller model surface. Silicon matrices enable casting of prototype models from foundry plastics, such as: casting wax, polyurethanes, polyester and epoxy resins. Properties of the plastic material used determine the shape of die parting. Because of its low strength, casting wax enforces die parting into a larger number of elements, thus enabling to pull it out without damage. The prototypes made from casting resins require considerably fewer parting surfaces. Silicon matrices enable to manufacture from several to several dozen cast patterns of prototype turbocharger impellers. The basic advantage of vacuum casting process is the shortening of prototype making time and cost, compared to traditional methods. The silicon matrixes permit casting and low-pressure injections of plastics. Some plastics may be used for producing foundry patterns for various metal alloy casting processes.
Źródło:
Journal of KONES; 2007, 14, 3; 125-130
1231-4005
2354-0133
Pojawia się w:
Journal of KONES
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Surface roughness of aircraft engine blade models produced with various methods of rapid prototyping
Autorzy:
Budzik, G.
Powiązania:
https://bibliotekanauki.pl/articles/243159.pdf
Data publikacji:
2007
Wydawca:
Instytut Techniczny Wojsk Lotniczych
Tematy:
combustion engine
rapid prototyping systems
surface roughness
impeller blade
Opis:
Results of the study of surface roughness of the aircraft engine blade model, produced with various methods of rapid prototyping are presented. Blade models were made with two incremental methods of rapid prototyping: stereo lithography (SLA-250 device) and three-dimensional printing (Z510 Spectrum printer). In incremental methods of rapid prototyping a model is formed by hardening of consecutive layers of the base material. Model position in the equipment work area has a significant influence on surfaces quality of a prototype, especially in stereo lithography method. It is essential in case of elements with curvilinear surfaces like aircraft engine blades. A CAD blade has been exported to the STL format within surface precision of 0,001 mm. Afterwards, it was duplicated and set up in various positions of the virtual work area of the 3D Light year programme dedicated to the SLA-250 device. Data prepared in this way have been used for producing physical models. Roughness surveys were carried out with the Talyscan150 device, manufactured by Taylor Hobson Precision. The measurements permitted making three-dimensional maps of surfaces of blade prototypes. Thanks to that, it was possible to determine optimum position of blade in the work area of RP devices in respect to prototype surface quality.
Źródło:
Journal of KONES; 2007, 14, 2; 55-60
1231-4005
2354-0133
Pojawia się w:
Journal of KONES
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Determination of the total efficiency for engine with spark - ignition and compression - ignition
Autorzy:
Cygnar, M.
Budzik, G.
Powiązania:
https://bibliotekanauki.pl/articles/246712.pdf
Data publikacji:
2013
Wydawca:
Instytut Techniczny Wojsk Lotniczych
Tematy:
two fuel injection systems
spark-ignition
compression-ignition engines
Opis:
This paper presented of developing a power system for two fuel injection systems – spark ignition and compression ignition. Two ways to initiate combustion process were used: initially the spark ignition, and after it turns off - the combustion is initiated by the injection of ignition injected fuel. The composition of the ignition dose was developed through the research conducted in order to adjust the right proportions of chemical components to obtain the best parameters of the combustion process. The study considered the performance of the ignition dose injected into the engine cylinder and its evaporation process, the charge stratification, the formation of toxic emission and the total efficiency of the engine. Experimental studies were carried out on a test engine equipped with two injection systems and automatic mode change control management. The scope of research included: – determining the basic characteristics of the engine operation, taking into account the injection advance angle of the ignition dose, – comparative studies of engine performance and exhaust gas composition, working with spark ignition and initiated by compression ignition of the ignition dose, – determining the increase in the general efficiency of the two-circulation engine working with injection of ignition dose compared to conventional power system with the initiation of combustion process from the spark plug.
Źródło:
Journal of KONES; 2013, 20, 1; 41-48
1231-4005
2354-0133
Pojawia się w:
Journal of KONES
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Visualization of internal stress pattern in gears in power transmission systems using rapid prototyping (RP)
Wizualizacja naprężeń w kołach zębatych układów napędowych z wykorzystaniem metod RP
Autorzy:
Sobolak, M.
Budzik, G.
Powiązania:
https://bibliotekanauki.pl/articles/243874.pdf
Data publikacji:
2008
Wydawca:
Instytut Techniczny Wojsk Lotniczych
Tematy:
rapid prototyping
gears
photoelasticity
Opis:
The paper contains description of an experimental method of stress pattern visualization. Mainly analytical methods and a Finite Element Method are used to determine internal stress pattern. Sometimes photo-elasticity is used. Model is made by copying real objects by casting from special optical-active resins. There is possible to put into use Rapid Prototyping methods. Some materials used in RP processes are optically active. In proposed solution of stress pattern visualization special models of gears are used. Models are made directly from optically active resin by Rapid Prototyping method - stereolitography. A transparent fotohardening optically active resin Sl5170 has been used to observe stress pattern in polarized light. Prototypes of gear are assembled in a special device and loaded by torque. The principle of a mechanical similarity was applied. In relation to the classic photo-elasticity method novelty is the use of the LCD monitor as a source of light and a camera with polarisation filter for observation and recording the distribution of internal stress pattern. The use of simulation of gear generating in CAD system and stereolitography method to produce a prototype allows you to eliminate the classic machining of gear at lower cost.
W artykule przedstawiono eksperymentalną metodę wyznaczania rozkładu naprężeń. W celu określenia rozkładu naprężeń używane są metody analityczne i komputerowe wykorzystujące metodę elementów skończonych. W niektórych przypadkach użycie znajduje elestooptyka. Modele do elastooptyki są kopiami rzeczywistych obiektów, wykonanymi z materiału czynnego optycznie. Możliwe jest zastosowanie techniki szybkiego prototypowania w celu wykonania takiego modeluo. Niektóre z materiałów używanych w szybkim prototypowaniu są czynne optycznie. W proponowanym rozwiązaniu w wizualizacji naprężeń w kołach zębatych układów napędowych używane są specjalne modele kół. Modele są wykonane bezpośrednio z żywicy czynnej optycznie metodą stereolitografii. Użyto przezroczystej, fotoutwardzalnej żywicy Sl5170 w celu wyznaczenia rozkładu naprężeń. Modele kół obserwowano w świetle spolaryzowanym. Koła zestawiono w specjalnym przyrządzie i obciążono momentem skręcającym. Zastosowano zasadę podobieństwa modelowego. W stosunku do klasycznej metody elastooptyki nowością jest zastosowanie monitora LCD jako źródła światła oraz aparatu fotograficznego z filtrem polaryzacyjnym do obserwacji i rejestracji rozkładu naprężeń. Zastosowanie symulacji obróbki obwiedniowej w systemie CAD oraz wytworzenie kół za pomocą stereolitografii elimnuje klasyczną obróbkę skrawaniem i przyczynia się do obniżenia kosztów badań.
Źródło:
Journal of KONES; 2008, 15, 2; 457-461
1231-4005
2354-0133
Pojawia się w:
Journal of KONES
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Automated measurement of bevel gears of the aircraft gearbox using GOM
Autorzy:
Marciniec, A.
Budzik, G.
Dziubek, T.
Powiązania:
https://bibliotekanauki.pl/articles/242283.pdf
Data publikacji:
2011
Wydawca:
Instytut Techniczny Wojsk Lotniczych
Tematy:
gear
aircraft gearbox
coordinate measuring technique
Opis:
Manufacture of aircraft gearbox elements requires control of gear geometric parameters at different stages of technological process. Acceleration and automation of measurement process can affect the duration of the finished item production. In case of measurement of gear wheels using modern technologies based on numerical machines, measurement process is based on processing of numerical data obtained by measurement using coordinate measuring machines. The goal of this paper is to present the opportunity to automate the measurement process of bevel gears, using coordinated optical scanner ATOS by GOM, equipped with a turntable. Using coordinate measuring technique, you can specify a set of methods and procedures for the designation of the complex dimensions of physical objects and transform them into a computer program space of coordinate measuring devices. The topics included in the article are intended to show the capabilities of the device used to improve the measurement process and shorten its time, and hence, lower its costs. Another thing described in the paper is the impact of measurement performance in automatic mode on the quality of performance - the numerical image of scanned surface, from the standpoint of accuracy and number of collected data points in the shortest time. The article includes an analysis of conditions related to the measurement works, such as the process ofpreparing the model and measurement equipment and data processing capacity. The result of the work will be presented methodology for automated scanning measurements of bevel Sears.
Źródło:
Journal of KONES; 2011, 18, 2; 287-292
1231-4005
2354-0133
Pojawia się w:
Journal of KONES
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Analysis of possibility of applying atypic al meshing in driving units of cars
Autorzy:
Kozik, B.
Budzik, G.
Pacana, J.
Powiązania:
https://bibliotekanauki.pl/articles/242388.pdf
Data publikacji:
2009
Wydawca:
Instytut Techniczny Wojsk Lotniczych
Tematy:
gears
involute profile
atypical meshing
Opis:
A constant tendency in the development of gear transmission is aiming for increasing its load capacity and minimalizing its outside dimensions and weight. It is particularly important in automotive vehicles. In every type of transmission, among others in gear-boxes, mainly involute profile wheels are used. The work presents analysis of possibility of applying a typical meshing in driving units of cars. This kind of meshing can be alternative to involute meshing which is most widely used in gear transmission. Among existing solutions of this type, Nowikow meshing is applied most often. A different kind of concavo-convex gearing is BBW type gearing. The gearing is obtained by generation with a tool with reference profile in which tooth profile of a rack is an involute. The analysis of possibility of applying has been carried out with the exemplary concavo-convex BBW type gearing. In BBW type gearing a wheel with a smaller number of teeth has a positive profile curvature, and a cooperating wheel has a negative curvature. Teeth profiles are conjugate ones, transverse contact ratio is higher than l, so this kind of gearing may be used also in gears with straight teeth. What is more linear contact occurring along the whole width of mating teeth, in comparison to point contact in Nowikow meshing, creates possibilities of obtaining higher load capacity of gearing. BBW gearing based on involute-derivative tooth profiles is characterized by smaller sensitivity to the change of axle distance than Nowikow meshing.
Źródło:
Journal of KONES; 2009, 16, 2; 225-230
1231-4005
2354-0133
Pojawia się w:
Journal of KONES
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Universal test stand for research of aeronautical multi - power path gear demonstrators
Autorzy:
Kozik, B.
Budzik, G.
Cieplak, M.
Powiązania:
https://bibliotekanauki.pl/articles/246565.pdf
Data publikacji:
2012
Wydawca:
Instytut Techniczny Wojsk Lotniczych
Tematy:
test stand
multi-power path gear
demonstrator
Opis:
Gears used for the tests may be made of metal or plastic [1, 2, 5]. The stand has been designed in an open system and it is powered by a three-phase electric motor. The control is provided by a single-phase inverter with three outputs, which provides full speed control. All components have been installed on a table equipped with T-slots in order to determine the optimal position of the drive and the tested gear. The load of the stand is realized by an electromagnetic powder brake. Load torque of the gear depends on the supplied current. During the test, you can change settings such as speed or load torque. Torque meters installed on input and output of the demonstrator let you control the work of the whole gear. Values supplied by the torque meters (torque and speed) are recorded on a computer in real time (according to PC RTC) and archived by specialized software. The software installed on your computer allows you to view results of the measurements. The possibility to control working time lets you precisely define the time intervals of various stages of the research. Using timer makes it possible to observe the current consumption of the transmission and helps to establish the research process. Thanks to data, recording you will know when the gear is damaged. Tests at this stand allow for obtaining stable working parameters, and thus for obtaining not distorted, accurate results of the demonstrator operation. Changing the gear is exceptionally simple because of the use of sliding splined connections of the couplings. Separating couplings between which the gear is situated and unlocking, the terminal allows exchanging it.
Źródło:
Journal of KONES; 2012, 19, 3; 233-238
1231-4005
2354-0133
Pojawia się w:
Journal of KONES
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Analysis of surface roughness of transmission gear teeth made by different rapid prototyping methods
Autorzy:
Budzik, G.
Markowski, T.
Sobola, M.
Powiązania:
https://bibliotekanauki.pl/articles/244106.pdf
Data publikacji:
2008
Wydawca:
Instytut Techniczny Wojsk Lotniczych
Tematy:
surface roughness
rapid prototyping
bevel gears
Opis:
Article presents analysis of surface roughness of aircraft and vehicle power transmission system gear teeth made by different Rapid Prototyping methods. Gear box models have been made by two rapid prototyping methods: stereolithography (SLA), three dimensional printing (3DP) and two rapid tooling methods: Vacuum Casting (VC), Low Pressure Injection (LPI). Surface roughness for rapid prototyping methods is determined mostly by layered system of building model. It depends on process parameters: layer thickness and model position in working space of RP machine. Vacuum Casting and Low Pressure Injection are Rapid Tooling technologies. For this technology final surface roughness is a reflection of surface parameters of tools (silicon mould, silicon matrix). The paper presents results of surface roughness measurements of gear made by few RP and RT methods. The most important thing was an analysis of surface roughness made by Rapid Tooling methods. In these methods surface roughness depends on surface parameters of basis RP model. For basis RP models finishing processing was applied. This process improves parameters of the surface. This research process allowed to define the influence of chosen RP and RT method and its parameters on surface roughness of gear tooth. It permitted to order rapid prototyping methods for application of power transmission prototype making process.
Źródło:
Journal of KONES; 2008, 15, 2; 29-34
1231-4005
2354-0133
Pojawia się w:
Journal of KONES
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Defining instantaneous contact track of aeronautical bevel gear applying finite elements method and rapid prototyping method
Autorzy:
Pacana, J.
Kozik, B.
Budzik, G.
Powiązania:
https://bibliotekanauki.pl/articles/246384.pdf
Data publikacji:
2010
Wydawca:
Instytut Techniczny Wojsk Lotniczych
Tematy:
contact track
FEM
bevel gear
Opis:
An instantaneous contact track is one of theparameters determining correct work of wheels in gears. It is the surface on the side of the tooth on which a contact is made with the cooperating surface of the other wheel in a given moment. The correctness of cooperation of wheels and kinematic accuracy of the gear depends on the shape and the size of an instantaneous contact track and its changes during rotation of wheels. Both the area of contact track and its position also depend on the greatness of load being in operation. Therefore it is important to carry out calculations for conditions of work which are the closest to real working conditions of aeronautical bevels gear. At the designing stage an instantaneous contact track can be determined by means of finite elements method (FEM). The article presents a methodology of defi ning contact track for loaded bevel gear by means of numerical finite elements method. The paper also presents Information about creating virtual models ofwheels, generating network of finite elements, defining edge conditions as well as carrying out calculations and processing the received results. Finally, it also presents the received solutions concerning the distribution of reduced stresses andan instantaneous contact track as well as the summary track of wheel teeth cooperation in a loaded bevel gear. However the results received by means of simulation of virtual models cooperation require verifying by other methods, favourably experimental ones. The received numerical solutions made using finite elements method were therefore compared to proper results recorded during examining real models of the same wheels. The examination was carried out on a special stand which had been designed end created for this purpose. The used wheels had been made by means of rapid prototyping method.
Źródło:
Journal of KONES; 2010, 17, 2; 379-386
1231-4005
2354-0133
Pojawia się w:
Journal of KONES
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Safety increase on crossroads in Rzeszów by installation of light signaling with automatic roads traffic measurements
Autorzy:
Budzik, G.
Jaskólski, J.
Mierzwa, R.
Powiązania:
https://bibliotekanauki.pl/articles/242446.pdf
Data publikacji:
2009
Wydawca:
Instytut Techniczny Wojsk Lotniczych
Tematy:
transport
road rebuilding
safety increase
crossroads
Opis:
The article presents solutions of crossroads which make it possible to eradicate dangerous places at selected crossroads in Rzeszów. The solution consists in redeveloping traffic lights signalizations and installations of self-exited system with automatic traffic measurements. The idea of safety increase comes down to the implementation of accommodated traffic lights for all road traffic users. This installation is adapted to the road traffic changes by altering the time of green signals for vehicular traffic and omitting the green lights for pedestrians if not necessary. The traffic control is realized on the basis of current registration of traffic intensity with a video detecting system (for vehicular traffic) and push-button (for pedestrian traffic). At the crossroads there are separate roadways to turn left. The traffic control system is divided into four elementary traffic phases, the sequence of which is dependent on the analyzed traffic situation. The safety increase was also accomplished by improvements of friction grip. It was a result of a special layer of SMA asphalt (4 centimeter thickness) application. Additionally, there were safety barriers built, which preclude car parking in the neighborhood of crossroads. These solutions increased visibility at crossroads. The goal of the rebuilding was to decrease the number of road accidents in vehicular and pedestrian traffic. The bettering of the traffic flow and the improvement of safety at Rzeszów crossroads were achieved by the crossroads rebuilding and traffic control system application at the following crossroads: Lubelska - Mączka - Wyzwolenia streets and Targowa -Pilsudskiego - Głowackiego Streets. The investment project assumed over 50% decrease of the quantity of road accidents.
Źródło:
Journal of KONES; 2009, 16, 2; 49-53
1231-4005
2354-0133
Pojawia się w:
Journal of KONES
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Balancing of turbocharger rotors
Wyważanie wirników turbosprężarek
Autorzy:
Jaskólski, J.
Budzik, G.
Marciniec, A.
Powiązania:
https://bibliotekanauki.pl/articles/243227.pdf
Data publikacji:
2007
Wydawca:
Instytut Techniczny Wojsk Lotniczych
Tematy:
turbosprężarka
parametry konstrukcyjne
własności dynamiczne
poziom drgań
turbocharger
construction parameters
dynamic properties
level of vibration
Opis:
Artykuł przedstawia konstrukcyjne i technologiczne aspekty wyważania układów wirujących turbosprężarek. Układ wirujący jest podstawowym elementem turbosprężarki odpowiedzialnym za jej prawidłową pracę. Wyważenie układu wirującego jest szczególnie istotne dla zmniejszenia drgań, które mogą spowodować zniszczenie turbosprężarki, dlatego jest to jedna z najważniejszych części procesu montażu. Konstrukcja wirników powinna charakteryzować się jak najmniejszą masą przy zachowaniu parametrów wytrzymałościowych. Konstrukcja wirników musi również zapewniać możliwość usunięcia naddatków materiału celem wyważenia układu wirującego. Usuwanie materiału realizowane jest poprzez obróbkę skrawaniem lub obróbkę ścierną. Mniejsza masa wirników zmniejsza opóźnienia układu wirującego turbosprężarki, co polepsza właściwości dynamiczne doładowanego silnika spalinowego. Wyważanie układu wirującego składa się z kilku etapów: wyważanie wirnika sprężarki, wyważanie wirnika turbiny, wyważanie zespołu wirującego, wyważania zespołu wirującego w korpusie turbosprężarki. W przypadku turbosprężarek o średnicy wirników powyżej 250 mm poddawane są one badaniom częstości drgań podczas prób na hamowni. Prawidłowe wyważenie zapewnia spełnienie wymagań technicznych dotyczących parametrów częstości drgań w zadanych zakresach prędkości obrotowej.
The paper presents constructional and technological aspects of balancing of turbocharger rotors. Rotor system is a basic element of a turbocharger, responsible for its correct operation. Balancing of a rotor system is very important for decreasing the level of vibration. High level of vibration can destroy a turbocharger. Balancing it is the one of the most important stages of the assembly process. Rotor design should guarantee light weight and high strength. Design of a rotor has to assure grinding allowance for balancing. Removal of material is realized by machining and abrasive machining. The lower the mass of a rotor, the smaller deceleration of the rotor system, what results in improved dynamic characteristic of a turbocharged engine. Balancing of a rotor system assembly consists of a few stages: balancing of a compressor rotor, balancing of a turbine impeller, balancing of a rotor system, then balancing of the rotor system mounted in a turbocharger body. Turbochargers with rotors of a diameter above 250 mm are examined for level of vibration on a special turbocharger test bench. Correct balancing assure fulfillment of all technical requirements concerning vibration levels in every range of the rotor speed.
Źródło:
Journal of KONES; 2007, 14, 2; 217-222
1231-4005
2354-0133
Pojawia się w:
Journal of KONES
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Determining of model similarity for flexspline of harmonic drive with the use of FEM and extensometer method
Autorzy:
Budzik, G.
Kozik, B.
Pacana, J.
Powiązania:
https://bibliotekanauki.pl/articles/242442.pdf
Data publikacji:
2009
Wydawca:
Instytut Techniczny Wojsk Lotniczych
Tematy:
mechanics
harmonic drives
flexspline
FEM
extensometers
Opis:
This paper presents an analysis of the feasibility of using the model similarity method in engineering design. The analysis applies to virtual and physical models of the flexspline body of harmonic gear drive. The task consisted in determining stress distribution in the virtual models of the flexspline by means of the finite element method (FEM) and next its verification during bench tests by the extensometer method. The values of stresses calculated by the FEM method and the extensometer method were compared with each other with the aim ofdefming model similarity. The numerical calculations were made by means of the ADINA application which uses FEM with the use of contact elements. Stress distribution calculations applied to simplified virtual models of the flexspline. By the simplification of models a great number of finite elements used for the discretisation process were limited and because of that the time of calculations was shortened. The simplified model was precise enough to determine the stresses in the flexspline body. The subject of this analysis was the impact of different values of the torque moment T2 on the stresses in the flexspline body of the harmonie drive. The results of numerical calculations were checked against the standing tests of the real drive by applying the extensometer method. During the work of the gear, the values of relative elongation were measured and, based on them, the values of stresses were determined and compared to the results of the numerical calculations by FEM in the analogous cross-sections of the flexspline. The comparability of the results received by both methods proves both that the models used in the numerical calculations were properly designed and that the assumptions as well as the calculation were properly made. The determining of model similarity for the examined harmonie drive will make it possible to carry out analyses of stress calculations by FEM on virtual models without the necessity to verify them by laboratory standing tests each time.
Źródło:
Journal of KONES; 2009, 16, 2; 55-60
1231-4005
2354-0133
Pojawia się w:
Journal of KONES
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Prototyping of bevel gears of aircraft power transmission
Prototypowanie stożkowej przekładni napędu lotniczego
Autorzy:
Budzik, G.
Markowski, T.
Sobolak, M.
Powiązania:
https://bibliotekanauki.pl/articles/243161.pdf
Data publikacji:
2007
Wydawca:
Instytut Techniczny Wojsk Lotniczych
Tematy:
silnik spalinowy
systemy szybkiego prototypowania
stereolitografia
przekładnia stożkowa
combustion engine
rapid prototyping systems
stereolithography
bevel gears
Opis:
Artykuł przedstawia proces wykonania prototypu stożkowej przekładni napędu lotniczego. Szybkie wykonywanie prototypów przekładni o nietypowych zarysach zębów jest możliwe metodami "Rapid Prototyping". Jedną z najdokładniejszych metod szybkiego prototypowania jest stereolitografia, która polega na warstwowym utwardzaniu promieniem lasera fotopolimeru. Metoda ta pozwala zbudowanie modeli kół zębatych o dowolnych kształtach. Za pomocą urządzenia stereolitograficznego SLA-250 wykonane zostały modele kół zębatych przekładni stożkowej. Modele stereolitograficzne mogą służyć do wykonania odlewów. Istotną zaletą prototypów kół zębatych wykonanych z fotoutwardzalnej żywicy jest ich przezroczystość. Zaleta ta pozwala na obserwację chwilowego śladu styku kół zębatych przekładni. Chwilowy ślad styku jest jednym z podstawowych parametrów opisujących prawidłową pracę przekładni. W tym celu przygotowane zostały specjalne modele kół zębatych o zmniejszonej grubości ścianki. Taka budowa pozwoliła na bardziej precyzyjną obserwację śladu styku oraz na zmniejszenia kosztów wykonania modeli. Śledzenie dynamiczne chwilowego śladu styku jest niemożliwe do wykonania tradycyjnymi metodami badawczymi. Zastosowanie metod szybkiego prototypowania daje dobre rezultaty w procesie badań nowych prototypowych przekładni zębatych napędów lotniczych.
The article presents manufacturing process of bevel gears of aircraft power transmission. Rapid prototyping of gears with complex tooth forms is possible with the use of modern methods. One of such methods is the stereo-lithography, where a model is obtained as a result of resin curing with laser beam. This method allows creating gear model with arbitrary tooth form. Bevel gears was carried out by method of stereolitography on SLA 250 apparatus. Gear wheel prototypes were predestined for casting by method losing patterns. One of the best advantages of stereolitography model is its transparency. This advantage allow to observation instantaneous contact ellipses of gear. Instantaneous contact ellipses of gear is one of the most important parameters describe correctly work of gear. Research of instantaneous contact ellipses of gear requires special construction of model gear with thin wall. This construction allows costing reduction of prototype. Observation of instantaneous contact ellipses of gear is not possible by traditional research method. Rapid Prototyping method give good results in research process of new prototype of aircraft transmission gear.
Źródło:
Journal of KONES; 2007, 14, 2; 61-66
1231-4005
2354-0133
Pojawia się w:
Journal of KONES
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Automated measurement of bevel gears of the aircraft gearbox using GOM
Autorzy:
Marciniec, A.
Budzik, G.
Dziubek, T.
Powiązania:
https://bibliotekanauki.pl/articles/247190.pdf
Data publikacji:
2011
Wydawca:
Instytut Techniczny Wojsk Lotniczych
Tematy:
gear
aircraft gearbox
coordinate measuring technique
Opis:
Manufacture of aircraft gearbox elements requires control of gear geometric parameters at different stages of technological process. Acceleration and automation of measurement process can affect the duration of the finished item production. In case of measurement of gear wheels using modern technologies based on numerical machines, measurement process is based on processing of numerical data obtained by measurement using coordinate measuring machines. The goal of this paper is to present the opportunity to automate the measurement process of bevel gears, using coordinated optical scanner ATOS by GOM, equipped with a turntable. Using coordinate measuring technique, you can specify a set of methods and procedures for the designation of the complex dimensions of physical objects and transform them into a computer program space of coordinate measuring devices. The topics included in the article are intended to show the capabilities of the device used to improve the measurement process and shorten its time, and hence, lower its costs. Another thing described in the paper is the impact of measurement performance in automatic mode on the quality of performance - the numerical image of scanned surface, from the standpoint of accuracy and number of collected data points in the shortest time. The article includes an analysis of conditions related to the measurement works, such as the process of preparing the model and measurement equipment and data processing capacity. The result of the work will be presented methodology for automated scanning measurements of bevel Sears.
Źródło:
Journal of KONES; 2011, 18, 4; 259-264
1231-4005
2354-0133
Pojawia się w:
Journal of KONES
Dostawca treści:
Biblioteka Nauki
Artykuł
Wyświetlanie 1-15 z 38

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