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    Wyświetlanie 1-19 z 19
    Tytuł:
    Taguchi Approach for Optimization of Parameters that Reduce Dimensional Variation in Investment Casting
    Autorzy:
    Bansode, S. N.
    Phalle, V. M.
    Mantha, S.
    Powiązania:
    https://bibliotekanauki.pl/articles/381195.pdf
    Data publikacji:
    2019
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    innovative foundry technology
    innovative foundry material
    investment casting
    dimensional accuracy
    Taguchi method
    optimisation
    innowacyjna technologia odlewnicza
    innowacyjny materiał odlewniczy
    odlewnictwo
    dokładność wymiarowa
    metoda Taguchi
    optymalizacja
    Opis:
    Variation in final casting dimensions is a major challenge in the investment casting industry. Additional correction operations such as die tool reworking as well as coining operations affect foundry productivity significantly. In this paper influence of basic parameters such as wax material, mould material, number of ceramic coats and feed location on the dimensional accuracy of stainless-steel casting has been investigated. Two levels of each factor were chosen for experimental study. Taguchi approach has been used to design the experiment and to identify the optimal condition of each parameter for reduced dimensional deviation. Analysis of variance has been carried out to determine the contribution of each process parameter. The result reports that selected parameters have significant effect on the dimensional variability of investment casting. Mould material is the dominant parameter with the largest contribution followed by number of ceramic coats and wax material whereas feed location is having negligible contribution.
    Źródło:
    Archives of Foundry Engineering; 2019, 1; 5-12
    1897-3310
    2299-2944
    Pojawia się w:
    Archives of Foundry Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Taguchi Approach to Tribological Behaviour of Chopped Carbon Fiber-Reinforced Epoxy Composite Materials
    Autorzy:
    Ozsoy, N.
    Ozsoy, M.
    Mimaroglu, A.
    Powiązania:
    https://bibliotekanauki.pl/articles/1047489.pdf
    Data publikacji:
    2017-09
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    81.05.Qk
    07.05.Fb
    Opis:
    Chopped carbon fiber-reinforced epoxy composites were fabricated and tested for tribological behaviour. Wear behaviour of composites was studied using pin-on-disc wear tester device. The design of experiment, using Taguchi method, was employed to analyse the results. Signal to noise ratio and analysis of variance (ANOVA) were used to determine the influence of parameters on the wear rate and coefficient of friction.
    Źródło:
    Acta Physica Polonica A; 2017, 132, 3; 846-848
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Optimization of fluoride removal using ultrasonically improved electrochemically generated adsorbent: A Taguchi approach
    Autorzy:
    Junghare, Kunjan C.
    Kodape, Shyam M.
    Rathod, Ajit P.
    Lataye, Dilip H.
    Powiązania:
    https://bibliotekanauki.pl/articles/2173422.pdf
    Data publikacji:
    2022
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    isotherms
    kinetics
    defluoridation
    electrolyte
    ultrasonication
    izotermy
    kinetyka
    defluoryzacja
    elektrolit
    ultradźwięki
    Opis:
    Ultrasonically improved electrochemically generated adsorbent (UEGA) has been synthesized and used for adsorption of fluoride ions from fluoride laden waste water. UEGA was prepared in two major steps, firstly electrochemically generated adsorbent (EGA) was prepared using electrolytic method followed by ultrasonication treatment. Ultrasonication causes size reduction which leads to increase in surface area viz. active site which helps to enhance attachment of negatively charged fluoride ion on positively changed UEGA from waste water. UEGA was prepared at three different amplitude i.e. 50, 70 and 90% respectively. Taguchi optimization for defluoridation was carried out considering operating parameters such as initial concentration; contact time; adsorbent dose; and temperature. The results obtained demonstrated that adsorption showed different fluoride removal at varying frequency. This study proved that varying percentage amplitude of ultrasonication significantly affects defluoridation efficiency.
    Źródło:
    Chemical and Process Engineering; 2022, 43, 2; 109--117
    0208-6425
    2300-1925
    Pojawia się w:
    Chemical and Process Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Taguchi Approach for Optimization of Parameters that Effect Grain Size of Cast A357 Alloy
    Autorzy:
    Çolak, M.
    Dışpınar, D.
    Powiązania:
    https://bibliotekanauki.pl/articles/379886.pdf
    Data publikacji:
    2017
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    A357 alloy
    grain refinement
    alloy modification
    Taguchi approach
    stop A357
    rafinowanie ziarna
    modyfikacja stopu
    metoda Taguchi
    Opis:
    Grain refining and modification are common foundry practice for improving properties of cast Al-Si alloys. In general, these types of treatments provide better fluidity, decreased porosity, higher yield strength and ductility. However, in practice, there are still some discrepancies on the reproducibility of the results from grain refining and effect of the refiner’s additions. Several factors include the fading effect of grain refinement and modifiers, inhomogeneous dendritic structure and non-uniform eutectic modification. In this study, standard ALCAN test was used by considering Taguchi’s experimental design techniques to evaluate grain refinement and modification efficiency. The effects of five casting parameters on the grain size have been investigated for A357 casting alloy. The results showed that the addition of the grain refiner was the most effective factor on the grain size. It was found that holding time, casting temperature, alloy type and modification with Sr were less effective over grain refinement.
    Źródło:
    Archives of Foundry Engineering; 2017, 17, 4; 35-42
    1897-3310
    2299-2944
    Pojawia się w:
    Archives of Foundry Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Optimum combination of machining parameters during drilling of aluminium 7075 alloys using Grey based Taguchi approach
    Autorzy:
    Sreenivasulu, Reddy
    Rao, Chalamalasetti Srinivasa
    Powiązania:
    https://bibliotekanauki.pl/articles/1819169.pdf
    Data publikacji:
    2020
    Wydawca:
    Politechnika Koszalińska. Wydawnictwo Uczelniane
    Tematy:
    drilling
    burr size
    surface roughness
    roundness error
    thrust force
    torque
    Taguchi method
    grey relational analysis
    wiercenie
    chropowatość powierzchni
    błąd okrągłości
    siła odporowa
    moment obrotowy
    metoda Taguchi
    szara analiza relacyjna
    Opis:
    From ancient days to till today manufacturing industries, especially making of holes on the parts during drilling process for precision assembling of parts facing problems with burr formation. Drilling operation is one of the finishing operation in the production cycle, removing of burrs during drilling process is a time consuming and non-value added process to the manufacturing sector. So reducing the size of burrs is the main aim of the present study. In the present work, optimization of burr size is considered during drilling of aluminium 7075 alloy. In this connection, experiments are conducted based on Grey based Taguchi. From Grey relational grades of responses selected optimal combination of parameters to attain multiple performance characteristics of responses with a corresponding higher grey relational grade. For identifying the most significant input parameters that influence the output responses ANOVA is conducted. Based on interaction effect plots of data means of responses from results of ANOVA, confirmation tests are conducted by choosing most significant parameters. Finally, observations reveals that feed rate, point and clearance angles are the most influential factors on burr size and also experimental results divulge that the lower the thrust force causes to decrease the burr height. The proposed approach is helpful to the budding entrepreneurs in the related areas to select optimal combination of drilling parameters to attain multiple performance characteristics of responses especially in burr size to prevent the post finishing operations up to certain extent.
    Źródło:
    Journal of Mechanical and Energy Engineering; 2020, 4, 3; 227--238
    2544-0780
    2544-1671
    Pojawia się w:
    Journal of Mechanical and Energy Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Optimization of GTAW Process Parameters of Dissimilar Al-Mg Alloys for Enhanced Joint Strength - Taguchi Approach
    Autorzy:
    Antony Prabu, D.
    Jayakumar, K.S.
    Madhavan Pillai, Elangovan
    Kumaresan, G.
    Powiązania:
    https://bibliotekanauki.pl/articles/27765105.pdf
    Data publikacji:
    2023
    Wydawca:
    Polska Akademia Nauk. Czasopisma i Monografie PAN
    Tematy:
    AA5052-H32
    AA5083-H111
    mechanical properties
    microstructures
    optimization
    tungsten inert gas welding
    Opis:
    The Tungsten Inert Gas (TIG) welding processes one of the prevalent methods used for welding aluminum alloys. TIG welding is most commonly used due to its superiority in welding less dense materials. The most prevalent issues encountered with TIG welding aluminium alloys are porosity creation and cracking due to solidification, both of which result in lower mechanical properties. Because of the metal’s susceptibility to heat input, this occurs. The current work is the result of a desire to improve the mechanical properties of dissimilar aluminium metals: AA5052-H32 & AA5083-H111. The process parameters of TIG welding are optimized towards eliminating the previously discussed failure scenarios. Various optimization techniques exist towards obtaining optimizing processes such as Response Surface Methodology (RSM), Genetic Algorithm (GA), Artificial Neutral Network (ANN), Flower pollination algorithm, Taguchi method etc, The Taguchi method was chosen for the optimization of process parameters due to its inherent nature of solving problems of singular variance. The optimal parameters combination was determined i.e. welding current at 170 A, filler rod diameter 2.4 mm and Gas flow rate of 11 lpm. The optimized input parameter was used to TIG weld the confirmation specimen which are further investigated for mechanical and metallurgical characterizations. The parameters were optimized and the results indicate that the input current was found to be the most contributing towards improving mechanical properties over all the process parameters.
    Źródło:
    Archives of Metallurgy and Materials; 2023, 68, 2; 599--606
    1733-3490
    Pojawia się w:
    Archives of Metallurgy and Materials
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Experimental investigation of cryogenically treated HSS tool in turning on AISI1045 using fuzzy logic – Taguchi approach
    Autorzy:
    Raja, P.
    Malayalamurthi, R.
    Sakthivel, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/202147.pdf
    Data publikacji:
    2019
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    cryogenic
    fuzzy
    roughness
    Taguchi
    temperature
    turning
    Opis:
    This work depicts the effects of deep cryogenically treated high-speed steel on machining. In recent research, cryogenic treatment has been acknowledged for improving the life or performance of tool materials. Hence, tool materials such as the molybdenum-based high-speed tool steel are frequently used in the industry at present. Therefore, it is necessary to observe the tool performance in machining; the present research used medium carbon steel (AISI 1045) under dry turning based on the L9 orthogonal array. The effect of untreated and deep cryogenically treated tools on the turning of medium carbon steel is analyzed using the multi-input-multi-output fuzzy inference system with the Taguchi approach. The cutting speed, feed rate and depth of cut were the selected process parameters with an effect on surface roughness and the cutting tool edge temperature was also observed. The results reveal that surface roughness decreases and cutting tool edge temperature increases on increasing the cutting speed. This is followed by the feed rate and depth of cut. The deep cryogenically treated tool caused a reduction in surface roughness of about 11% while the cutting tool edge temperature reduction was about 23.76% higher than for an untreated tool. It was thus proved that the deep cryogenically treated tool achieved better performance on selected levels of the turning parameters.
    Źródło:
    Bulletin of the Polish Academy of Sciences. Technical Sciences; 2019, 67, 4; 687-696
    0239-7528
    Pojawia się w:
    Bulletin of the Polish Academy of Sciences. Technical Sciences
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Experimental Investigation and Multi-Response Optimization in Turning of Incoloy 800H Superalloy
    Autorzy:
    Palanisamy, A.
    Selvaraj, T.
    Sivasankaran, S.
    Powiązania:
    https://bibliotekanauki.pl/articles/356237.pdf
    Data publikacji:
    2018
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    superalloy
    microstructure
    Taguchi-Grey approach
    mathematical models
    Opis:
    This research work is focused on examining the turning behavior of Incoloy 800H superalloy by varying important cutting parameters. Incoloy 800H is an Iron-Nickel-Chromium based superalloy; it can withstand high temperature (810°C), high oxidization and corrosion resistance. But, it is difficult to turn in conventional machines and hence the present work was carried out and investigated. Experiments were conducted based on the standard L27 orthogonal array using uncoated tungsten inserts. The cutting force components, namely, feed force (Fx), thrust force (Fy) and cutting force (Fz); surface roughness (Ra) and specific cutting pressure (SCPR) were measured as responses and optimized using Taguchi-Grey approach. The main effects plots and analysis of mean (ANOM) were performed to check the effect of turning parameters and their significance on responses of cutting forces in all the direction (FX, FY, FZ), the surface roughness (Ra) and specific cutting pressure (SCPR). The tool wear and machined surfaces were also investigated using white light interferometer and SEM.
    Źródło:
    Archives of Metallurgy and Materials; 2018, 63, 4; 1683-1691
    1733-3490
    Pojawia się w:
    Archives of Metallurgy and Materials
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Study on an Optimal Design of Mechanical Properties for PP/PET Nonwovens
    Poszukiwanie optymalnej struktury włóknin PP/PET dla poprawy ich właściwości mechanicznych
    Autorzy:
    Su, T. L.
    Gui-Bing, H.
    Powiązania:
    https://bibliotekanauki.pl/articles/232529.pdf
    Data publikacji:
    2012
    Wydawca:
    Sieć Badawcza Łukasiewicz - Instytut Biopolimerów i Włókien Chemicznych
    Tematy:
    włókna igłowane
    maszyna igłująca
    optymalizacja
    metoda Taguchi
    analiza
    needle-punched nonwovens
    optimisation
    Taguchi approach
    grey relational analysis
    analysis
    Opis:
    This study aimed to determine the optimal process parameters of needle-punched nonwoven fabrics, and obtain the maximal strength of needle-punched nonwoven fabrics. The Taguchi approach and grey relational analysis were used to solve the multi-quality optimisation problem and determine the optimal process parameter combination of needlepunched nonwoven fabrics. The L9 orthogonal array was used to design parameters that affect the needle-punched nonwoven fabric process, including the folding machine oscillating speed, folding machine conveying speed, needle-punch depth, and needle-punch density. Then grey relational analysis was used to overcome the single quality characteristic disadvantage of the Taguchi approach, and the optimal process parameter combination of multiple quality characteristics was obtained from the response graph of the analysis. The quality characteristics of this experiment are the nonwoven fabric tearing strength and tensile strength. Signal-to-noise ratios (S/N ratio) were calculated and an analysis of variance (ANOVA) was conducted to analyse the experiment results. The results of ANOVA showed that the factors with a significant effect on the quality characteristics of needlepunched nonwoven fabrics included the needle-punch depth and needle-punch density. In other words, by controlling these factors the quality characteristics of the needle-punched nonwoven fabrics could be controlled effectively. Finally, the 95% confidence interval of the verification experiment proved that this experiment was reliable and reproducible
    Celem pracy było wyznaczenie optymalnych parametrów procesu, otrzymywanie włóknin igłowanych dla uzyskania optymalnych właściwości, w tym możliwie jak największej wytrzymałości mechanicznej. Zastosowano metodę Taguchi i analizę zbiorów rozmytych. Jako parametry wyjściowe przyjęto: prędkość oscylacji maszyny igłującej, szybkość transportową, głębokość igłowania oraz gęstość przeigłowań. Optymalizację przeprowadzano pod kątem uzyskania maksymalnej wytrzymałości włókniny oraz odporności na rozrywanie. Przy analizie określano poziom szumów sygnału oraz przeprowadzono analizę wariancji. Stwierdzono, że najistotniejszymi parametrami, które muszą być kontrolowane w czasie produkcji włókniny są głębokość i gęstość przeigłowań.
    Źródło:
    Fibres & Textiles in Eastern Europe; 2012, 5 (94); 75-79
    1230-3666
    2300-7354
    Pojawia się w:
    Fibres & Textiles in Eastern Europe
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    A novel approach to enhance performance of multilayer coated carbide insert in hard turning
    Nowe podejście do poprawy osiągów w toczeniu na twardo przy użyciu wielowarstwowej płytki z ceramiki narzędziowej
    Autorzy:
    Shihab, S. K.
    Khan, Z. A.
    Siddiquee, A. N.
    Khan, N. Z.
    Powiązania:
    https://bibliotekanauki.pl/articles/140027.pdf
    Data publikacji:
    2015
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    hard turning
    flank wear
    Taguchi approach
    multi-coated carbide
    micro-channel
    toczenie na twardo
    zużycie krawędzi
    podejście Taguchi
    węglik wielowarstwowy
    mikrokanał
    Opis:
    Flank wear of multilayer coated carbide (TiN/TiCN/Al2O3/TiN) insert in dry hard turning is studied. Machining under wet condition is also performed and flank wear is measured. A novel micro-channel is devised in the insert to deliver the cutting fluid directly at the tool-chip interface. Lower levels of cutting parameters yield the minimum flank wear which is significantly affected by cutting speed and feed rate. In comparison to dry and wet machining, insert with micro-channel reduces the flank wear by 48.87% and 3.04% respectively. The tool with micro-channel provides saving of about 87.5% in the consumption of volume of cutting fluid and energy.
    W pracy przedstawiono badania nad zużyciem krawędzi skrawającej wielowarstwowej płytki z ceramiki narzędziowej (TiN/TiCN/Al2O3/TiN) w toczeniu twardym na sucho. Badano także zużycie krawędzi skrawającej w warunkach toczenia na mokro. Nowatorskim rozwiązaniem było zastosowanie mikrokanału w płytce skrawającej, przez który płyn smarny dostarczany jest bezpośrednio do styku między narzędziem i wiórem. Uzyskany tą drogą niższy poziom parametrów skrawania zapewnia minimalne zużycie krawędzi skrawającej, na które w istotny sposób wpływają prędkość skrawania i szybkość posuwu. W porównaniu do warunków toczenia na sucho i na mokro, zastosowanie mikrokanału zmniejsza zużycie krawędzi skrawającej o odpowiednio 48,87% i 3,04%. Narzędzie z mikrokanałem zapewnia także oszczędność zużycia płynu smarnego i energii o ok. 87,5%.
    Źródło:
    Archive of Mechanical Engineering; 2015, LXII, 4; 539-552
    0004-0738
    Pojawia się w:
    Archive of Mechanical Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Biological removal of nickel (II) by Bacillus sp. KL1 in different conditions: optimization by Taguchi statistical approach
    Autorzy:
    Taran, M.
    Sisakhtnezhad, S.
    Azin, T
    Powiązania:
    https://bibliotekanauki.pl/articles/777958.pdf
    Data publikacji:
    2015
    Wydawca:
    Zachodniopomorski Uniwersytet Technologiczny w Szczecinie. Wydawnictwo Uczelniane ZUT w Szczecinie
    Tematy:
    Nickel
    Bioremediation
    Garbage leachate
    Bacillus sp KL1
    Taguchi method
    Opis:
    Bioremediation is the removal of heavy-metals such as nickel (Ni) using microorganisms and has been considered as an important field in the biotechnology. Isolation and characterization of microorganisms exhibiting bioremediation activities and their optimization to treat polluted wastewaters is a vital and difficult task in remediation technologies. In this study, investigation was carried out to isolate Ni (II) remediating microbial strains from soils contaminated with municipal solid waste leachate. Furthermore, Taguchi design of experiments were used to evaluate the influence of concentration, pH, temperature, and time on bioremediation of Ni (II) using isolated bacteria. This study concluded that Bacillus sp. KL1 is a Ni (II)-resistant strain and had Ni (II) bioremediation activity. The highest bioremediation of Ni (II) was observed as 55.06% after 24 h at 30ºC, pH 7, and 100 ppm concentration. Moreover, it was also observed that concentration is the most effective factor in the bioremediation process. In conclusion, we have demonstrated that bacteria isolated from soils contaminated with garbage leachate have the Bacillus sp. KL1 bacteria which can efficiently uptake and eliminate Ni (II) from contaminated sites and thus makes it possible to treat heavy-metal containing wastewaters in industry by using this microorganism at optimized conditions.
    Źródło:
    Polish Journal of Chemical Technology; 2015, 17, 3; 29-32
    1509-8117
    1899-4741
    Pojawia się w:
    Polish Journal of Chemical Technology
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Effect of infill and density pattern on the mechanical behaviour of ABS parts manufactured by FDM using Taguchi and ANOVA approach
    Autorzy:
    Othmani, M.
    Zarbane, K.
    Chouaf, A.
    Powiązania:
    https://bibliotekanauki.pl/articles/2175753.pdf
    Data publikacji:
    2021
    Wydawca:
    Stowarzyszenie Komputerowej Nauki o Materiałach i Inżynierii Powierzchni w Gliwicach
    Tematy:
    fused deposition modelling
    infill pattern
    infill density
    finite element analysis
    Taguchi
    modelowanie metodą osadzania topionego
    wzór wypełnienia
    gęstość wypełnienia
    analiza elementów skończonych
    Opis:
    Purpose: The present work aims to investigate the effect of many infill patterns (rectilinear, line, grid, triangles, cubic, concentric, honeycomb, 3D honeycomb) and the infill density on the mechanical tensile strength of an Acrylonitrile Butadiene Styrene (ABS) test specimen manufactured numerically by FDM. Design/methodology/approach: Computer-Aided Design (CAD) software has been used to model the geometry and the mesostructure of the test specimens in a fully automatic manner from a G-code file by using a script. Then, a Numerical Design of Experiments (NDoE) has been carried out by using Taguchi method and the Analysis of Variance (ANOVA). The tensile behaviour of these numerical test specimens has been studied by the Finite Element Analysis (FEA). Findings: The FEA results showed that a maximal Ultimate Tensile Strength (UTS) was reached by using the ‘concentric’ infill pattern combined with an infill density of 30%. The results also show that the infill pattern and the infill density are significant factors. Research limitations/implications: The low infill densities of 20% and 30% that have already been used in many previous studies, we have also applied it in order to reduce the time of the simulations. Indeed, with high infill density, the simulations take a very excessive time. In an ongoing study, we predicted higher percentages. Practical implications: This study provided an important modelling tool for the design and manufacture of functional parts and helps the FDM practitioners and engineers to manufacture strong and lightweight FDM parts by choosing the optimal process parameters. Originality/value: This study elucidated the effect of various infill patterns on the tensile properties of the test specimens and applied for the first time a NDoE using numerical test specimens created by the mesostructured approach, which considerably minimized the cost of the experiments while obtaining an error of 6.8% between the numerical and the experimental values of the UTS.
    Źródło:
    Archives of Materials Science and Engineering; 2021, 111, 2; 66--77
    1897-2764
    Pojawia się w:
    Archives of Materials Science and Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Optimization on turning parameters of 15-5PH stainless steel using Taguchi based grey approach and TOPSIS
    Optymalizacja parametrów toczenia stali nierdzewnej 15-5PH z wykorzystaniem „szarej” analizy relacyjnej opartej na metodzie Taguchi i metody TOPSIS
    Autorzy:
    Palanisamy, D.
    Senthil, P.
    Powiązania:
    https://bibliotekanauki.pl/articles/140141.pdf
    Data publikacji:
    2016
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    machinability
    PH stainless steel
    Taguchi based grey approach
    TOPSIS
    skrawalność
    stal nierdzewna PH
    szara analiza relacyjna (GRA) oparta na metodzie Taguchi
    Opis:
    The machinability and the process parameter optimization of turning operation for 15-5 Precipitation Hardening (PH) stainless steel have been investigated based on the Taguchi based grey approach and Technique for Order Preference by Similarity to Ideal Solution (TOPSIS). An L27 orthogonal array was selected for planning the experiment. Cutting speed, depth of cut and feed rate were considered as input process parameters. Cutting force (Fz ) and surface roughness (Ra) were considered as the performance measures. These performance measures were optimized for the improvement of machinability quality of product. A comparison is made between the multi-criteria decision making tools. Grey Relational Analysis (GRA) and TOPSIS are used to confirm and prove the similarity. To determine the influence of process parameters, Analysis of Variance (ANOVA) is employed. The end results of experimental investigation proved that the machining performance can be enhanced effectively with the assistance of the proposed approaches.
    Optymalizację parametrów procesu toczenia stali nierdzewnej typu 15-5 utwardzanej wydzieleniowo (PH) badano stosując „szarą” analizę relacyjną (GRA) opartą na metodzie Taguchi i metodę rozwiązywania problemów decyzyjnych TOPSIS. Układ planowanych eksperymentów przedstawiono w formie tablicy ortogonalnej L27. Miarami jakości procesu były siła skrawania (Fz ) i chropowatość powierzchni (Ra). Miary te zostały zoptymalizowane w celu poprawy skrawalności. Przeprowadzono porównanie pomiędzy różnymi wielokryterialnymi metodami decyzyjnymi. Zastosowano „szarą” analizę relacyjną (GRA) i metodę TOPSIS by potwierdzić i udowodnić podobieństwo wyników. Zastosowano analizę wariancji (ANOVA) by wyznaczyć wpływy parametrów procesu toczenia. Wyniki końcowe badań eksperymentalnych potwierdzają, że jakość skrawania może być efektywnie podwyższona przy zastosowaniu wspomnianych metod.
    Źródło:
    Archive of Mechanical Engineering; 2016, LXIII, 3; 397-412
    0004-0738
    Pojawia się w:
    Archive of Mechanical Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Dry Sliding Wear Behavior of Super Duplex Stainless Steel AISI 2507: A Statistical Approach
    Autorzy:
    Davanageri, M.
    Narendranath, S.
    Kadoli, R.
    Powiązania:
    https://bibliotekanauki.pl/articles/379496.pdf
    Data publikacji:
    2016
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    duplex stainless steel
    specific wear rate
    Taguchi method
    response surface methodology
    desirability function approach
    stal nierdzewna duplex
    stopień zużycia
    metoda Taguchi
    metoda powierzchni odpowiedzi
    Opis:
    The dry sliding wear behavior of heat-treated super duplex stainless steel AISI 2507 was examined by taking pin-on-disc type of wear-test rig. Independent parameters, namely applied load, sliding distance, and sliding speed, influence mainly the wear rate of super duplex stainless steel. The said material was heat treated to a temperature of 850°C for 1 hour followed by water quenching. The heat treatment was carried out to precipitate the secondary sigma phase formation. Experiments were conducted to study the influence of independent parameters set at three factor levels using the L27 orthogonal array of the Taguchi experimental design on the wear rate. Statistical significance of both individual and combined factor effects was determined for specific wear rate. Surface plots were drawn to explain the behavior of independent variables on the measured wear rate. Statistically, the models were validated using the analysis of variance test. Multiple non-linear regression equations were derived for wear rate expressed as non-linear functions of independent variables. Further, the prediction accuracy of the developed regression equation was tested with the actual experiments. The independent parameters responsible for the desired minimum wear rate were determined by using the desirability function approach. The worn-out surface characteristics obtained for the minimum wear rate was examined using the scanning electron microscope. The desired smooth surface was obtained for the determined optimal condition by desirability function approach.
    Źródło:
    Archives of Foundry Engineering; 2016, 16, 4; 47-56
    1897-3310
    2299-2944
    Pojawia się w:
    Archives of Foundry Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    An approach to identify the interactions between the control factors in a Mahalanobis-Taguchi System
    Autorzy:
    Labidi, Amal
    Tanabe, Ikuo
    Tanabe, Yuko
    Isobe, Hiromi
    Powiązania:
    https://bibliotekanauki.pl/articles/2052189.pdf
    Data publikacji:
    2022
    Wydawca:
    Wrocławska Rada Federacji Stowarzyszeń Naukowo-Technicznych
    Tematy:
    MT system
    Mahalanobis-Taguchi system
    RT method
    control
    Mahalanobis distance
    design of experiment
    Opis:
    The Mahalanobis-Taguchi System (MTS) is, today, widely used to define the optimal conditions for the design stage of product development especially, in the field of Artificial Intelligence (AI) considering the non-linear properties and non-digital data. In this paper, an approach to identify the several interactions in a MTS is proposed. The MTS contains four methods; Mahalanobis-Taguchi (MT) method, Mahalanobis Taguchi Adjoint (MTA) method, Recognition Taguchi (RT) method and Taguchi (T) method. The method to use for the analysis is selected based on the system’s properties. For the case of study used in this research, the unit space is created through the RT method and used to calculate the Mahalanobis-Taguchi distances (MTD). For the method proposed in this paper, the relationships between control factors and MTDs were firstly clarified by MTS (RT), then the same relationships were clarified using a modified design of experiments method, and the several interactions between control factors in MTS (RT) were finally identified by comparing the two relationships. Then effectiveness of the proposed method was evaluated by using a mathematical model.
    Źródło:
    Journal of Machine Engineering; 2022, 22, 1; 96-110
    1895-7595
    2391-8071
    Pojawia się w:
    Journal of Machine Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Simulation Approach to Investigate the Effect of the Jet Structure and Air Pressure on the Performance of Siro-jet Spinning
    Próba symulacji dla badania wpływu struktury dyszy i ciśnienia powietrza na przebieg przędzenia typu siro-jet
    Autorzy:
    Hasani, H.
    Hasani, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/233895.pdf
    Data publikacji:
    2012
    Wydawca:
    Sieć Badawcza Łukasiewicz - Instytut Biopolimerów i Włókien Chemicznych
    Tematy:
    włochatość przędzy
    metoda Taguchi
    symulacja
    ciśnienie w dyszy
    air-jet
    Taguchi method
    siro- spinning
    simulation
    yarn hairiness
    Opis:
    In this paper, the effects of different parameters on the hairiness of siro-jet spun yarns, such as the nozzle pressure, the distance between the front roller nip and inlet of the nozzle, and jet structure were investigated. Using the Taguchi method, it was concluded that the factor air pressure has the strongest effect and the factor distance between the front roller nip and inlet of the nozzle does not have a significant effect on the performance of the siro-jet spinning system in reducing yarn hairiness. A computational fluid dynamics model was developed to simulate the airflow pattern inside the jets. The effect of air pressure and the jet structure was simulated using Fluent 6.3 software. The application of an air-jet nozzle reduces yarn hairiness by 40%.
    Badano wpływ na włochatość przędzy takich parametrów jak: ciśnienie w dyszy, odległość pomiędzy wałkiem przednim a wejściem do dyszy, struktura dyszy. Stosując metodę Taguchi, stwierdzono, że ciśnienie powietrza ma największy wpływ na przebieg przędzenia i redukcję włochatości w analizowanym systemie przędzenia, natomiast odległość pomiędzy wałkiem przednim a wejściem do dyszy nie ma istotnego wpływu. Opracowano obliczeniowy model dynamiki przepływu umożliwiający symulowanie rozkładu przepływu powietrza w dyszy. Do obliczeń stosowano program Fluent 6.3. W wyniku zastosowania odpowiednio zaprojektowanej dyszy można obniżyć włochatość o 40%.
    Źródło:
    Fibres & Textiles in Eastern Europe; 2012, 3 (92); 46-50
    1230-3666
    2300-7354
    Pojawia się w:
    Fibres & Textiles in Eastern Europe
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Original approach for the drilling process optimization in open cast mines; Case study of Kef Essenoun open pit mine Northeast of Algeria
    Autorzy:
    Rais, K.
    Kara, M.
    Gadri, L.
    Hadji, R.
    Khochmen, L.
    Powiązania:
    https://bibliotekanauki.pl/articles/89154.pdf
    Data publikacji:
    2017
    Wydawca:
    Politechnika Wrocławska. Wydział Geoinżynierii, Górnictwa i Geologii. Instytut Górnictwa
    Tematy:
    statistical analysis
    variance
    design of experimental
    Taguchi method
    phosphate mine
    Opis:
    The drill ability is a fundamental factor for bit penetration rate (PR) in mining engineering. The ability to predict the performance of rock drills is important for drilling operations. Not a single parameter defines the drill ability of a rock. For this task, a considerable amount of fieldwork must be done to provide the necessary data i.e.: rock properties and drilling technologies. The main purpose of this research is to conduct an experimental study under varying rotation and pressures on the drilling bit for different geological formations. This paper presents a statistical analysis of process parameters of drilling in a phosphate mine in Jebel Onk, Tebessa, Algeria. Settings drilling parameters were determined by applying the design of experiments method. The level of importance of drilling parameters is determined by using analysis of variances. First, the teamwork determined the mathematical model for representative conditions of the phosphate mine of Jebel Onk. This mathematical model is a vital mathematical requirement for the operation engineers to deduce and determine the penetration rate according to the demands of work and to maximize the efficiency of the drilling machine and to minimize the bit wear in the abrasive layer.
    Źródło:
    Mining Science; 2017, 24; 147-159
    2300-9586
    2353-5423
    Pojawia się w:
    Mining Science
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Statistical Optimization of a Novel Approach for the Reductive Debenzylation of 2,4,6,8,10,12-Hexabenzyl-2,4,6,8,10,12-hexaazaisowurtzitane Using Pd@SiO2 Nano Catalyst
    Autorzy:
    Zarandi, M.
    Bayat, Y.
    Zebardasti, A.
    Khayrabadi, A. A.
    Powiązania:
    https://bibliotekanauki.pl/articles/358766.pdf
    Data publikacji:
    2017
    Wydawca:
    Sieć Badawcza Łukasiewicz - Instytut Przemysłu Organicznego
    Tematy:
    Pd@SiO2
    reductive debenzylation
    nano
    catalyst
    Taguchi
    Opis:
    The synthesis of 2,6,8,12-tetraacetyl-4,10-dibenzyl-2,4,6,8,10,12-hexaazaisowurtzitane (TADB), from 2,4,6,8,10,12-hexabenzyl-2,4,6,8,10,12-hexaazaisowurtzitane(HBIW) is a key step in the preparation of 2,4,6,8,10,12-hexanitro-2,4,6,8,10,12-hexaazaisowurtzitane (HNIW or CL-20). In this study, a novel highly efficient nano catalyst based on Pd@SiO2 was used for the reductive debenzylation of HBIW. It is notable that an orthogonal array design OA9 was applied as a statistical optimization method for the synthesis of TADB. The current application of the Taguchi method in optimizing the experimental parameters of the TADB synthetic procedure was successful. TADB was synthesized by investigating the effect of the reaction conditions, such as catalyst percentage, time (h) and temperature (°C). The effects of these factors on the yield of TADB were evaluated quantitavely by the analysis of variance (ANOVA). The Pd@SiO2 nano catalyst, consisting of a palladium core with SiO2 monolayer shells, was synthesized and characterized by SEM, TEM and IR spectroscopy. The optimum condition indicated that the use of fresh Pd@SiO2 nano catalyst provides a high yield (90%). The use of Pd@SiO2 nano catalyst after recovery gave a yield of 65%.
    Źródło:
    Central European Journal of Energetic Materials; 2017, 14, 4; 984-995
    1733-7178
    Pojawia się w:
    Central European Journal of Energetic Materials
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Statistical analysis of entropy generation in longitudinally finned tube heat exchanger with shell side nanofluid by a single phase approach
    Autorzy:
    Konchada, P. K.
    Pv, V.
    Bhemuni, V.
    Powiązania:
    https://bibliotekanauki.pl/articles/240513.pdf
    Data publikacji:
    2016
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    longitudinal finned tube heat exchanger
    user functions and CEL Expressions
    ANSYS CFX
    Taguchi
    entropy generation
    wymiennik ciepła
    rury żebrowane
    funkcje użytkownika
    generowanie entropii
    Opis:
    The presence of nanoparticles in heat exchangers ascertained increment in heat transfer. The present work focuses on heat transfer in a longitudinal finned tube heat exchanger. Experimentation is done on longitudinal finned tube heat exchanger with pure water as working fluid and the outcome is compared numerically using computational fluid dynamics (CFD) package based on finite volume method for different flow rates. Further 0.8% volume fraction of aluminum oxide (Al2O3) nanofluid is considered on shell side. The simulated nanofluid analysis has been carried out using single phase approach in CFD by updating the user-defined functions and expressions with thermophysical properties of the selected nanofluid. These results are thereafter compared against the results obtained for pure water as shell side fluid. Entropy generated due to heat transfer and fluid flow is calculated for the nanofluid. Analysis of entropy generation is carried out using the Taguchi technique. Analysis of variance (ANOVA) results show that the inlet temperature on shell side has more pronounced effect on entropy generation.
    Źródło:
    Archives of Thermodynamics; 2016, 37, 2; 3-22
    1231-0956
    2083-6023
    Pojawia się w:
    Archives of Thermodynamics
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-19 z 19

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