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    Wyświetlanie 1-11 z 11
    Tytuł:
    Parameters optimization of MAG welding for enhancing the mechanical properties and buckling behaviour of welded steel
    Autorzy:
    Alwan, A. H.
    Mahmood, N. Y.
    Powiązania:
    https://bibliotekanauki.pl/articles/368428.pdf
    Data publikacji:
    2020
    Wydawca:
    Stowarzyszenie Komputerowej Nauki o Materiałach i Inżynierii Powierzchni w Gliwicach
    Tematy:
    MAG welding parameters
    critical buckling load
    Taguchi method
    ANOVA
    optimization
    spawanie MAG
    parametry spawania
    metoda Taguchi
    optymalizacja
    Opis:
    Purpose: The influence of metal active gas welding variables, including current, wire feeding speed and gas flow rate on the ultimate tensile strength and critical buckling load of steel (St.24) and the optimized welding conditions were discussed. Design/methodology/approach: The experimental steps are firstly designing the experiments, secondly conducting the mechanical tests, thirdly analysing the results through Minitab 16 and finally determining the optimum welding parameters. Confirmation tests of the optimized variables were validated. Findings: ANOVA approach manifested that the significant effect of welding variable on the tensile strength was the gas flow rate, while the current was on the critical buckling load. The results are confirmed and given the optimum values. Research limitations/implications: The influence of MAG welding variables (current, wire feeding speed and gas flow rate) on the tensile and buckling strengths of steel will be investigated in order to avoid the failure of many welded assemblies in the structures due to the buckling, in addition to reduce the requirement of long time and high cost to produce such assemblies. Therefore, it is necessary to find a solution to encounter the difficulties in their welding process. Practical implications: The major challenge was how to reduce the time and cost beside gaining the optimum properties through the designed experiments. Originality/value: The results may be helpful to design any welded joints in machine frames, structural steel connections and crane structures at the optimum condition.
    Źródło:
    Journal of Achievements in Materials and Manufacturing Engineering; 2020, 99, 1; 5-13
    1734-8412
    Pojawia się w:
    Journal of Achievements in Materials and Manufacturing Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    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:
    Optimization of Process Parameters During End Milling and Prediction of Work Piece Temperature Rise
    Autorzy:
    Bhirud, N. L.
    Gawande, R. R.
    Powiązania:
    https://bibliotekanauki.pl/articles/140078.pdf
    Data publikacji:
    2017
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    dry milling
    end milling
    Al 6063
    Taguchi method
    variance analysis ANOVA
    regression analysis
    frezowanie na sucho
    frezowanie wykończeniowe
    metoda Taguchiego
    analiza wariancji (ANOVA)
    analiza regresji
    Opis:
    During the machining processes, heat gets generated as a result of plastic deformation of metal and friction along the tool–chip and tool–work piece interface. In materials having high thermal conductivity, like aluminium alloys, large amount of this heat is absorbed by the work piece. This results in the rise in the temperature of the work piece, which may lead to dimensional inaccuracies, surface damage and deformation. So, it is needed to control rise in the temperature of the work piece. This paper focuses on the measurement, analysis and prediction of work piece temperature rise during the dry end milling operation of Al 6063. The control factors used for experimentation were number of flutes, spindle speed, depth of cut and feed rate. The Taguchi method was employed for the planning of experimentation and L18 orthogonal array was selected. The temperature rise of the work piece was measured with the help of K-type thermocouple embedded in the work piece. Signal to noise (S/N) ratio analysis was carried out using the lower-the-better quality characteristics. Depth of cut was identified as the most significant factor affecting the work piece temperature rise, followed by spindle speed. Analysis of variance (ANOVA) was employed to find out the significant parameters affecting the work piece temperature rise. ANOVA results were found to be in line with the S/N ratio analysis. Regression analysis was used for developing empirical equation of temperature rise. The temperature rise of the work piece was calculated using the regression equation and was found to be in good agreement with the measured values. Finally, confirmation tests were carried out to verify the results obtained. From the confirmation test it was found that the Taguchi method is an effective method to determine optimised parameters for minimization of work piece temperature.
    Źródło:
    Archive of Mechanical Engineering; 2017, LXIV, 3; 327-346
    0004-0738
    Pojawia się w:
    Archive of Mechanical Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Experimental Investigation and Optimization of Machining Parameters in Turning of Aluminum Alloy 075-T651
    Autorzy:
    Srivastava, Arpit
    Verma, Mukesh Kumar
    Niranjan, Ramendra Singh
    Chandra, Abhishek
    Patel, Praveen Bhai
    Powiązania:
    https://bibliotekanauki.pl/articles/26072641.pdf
    Data publikacji:
    2021
    Wydawca:
    Stowarzyszenie Menedżerów Jakości i Produkcji
    Tematy:
    metoda Taguchiego
    siła posuwowa
    siła skrawania
    siła promieniowa
    MRR
    Taguchi method
    feed force
    cutting force
    radial force
    Opis:
    Aluminum alloy 7075-T651 is a widely used material in the aviation, marine, and automobile sectors. The wide application marks the importance of this material’s research in the manufacturing field. This research focuses on optimizing input process parameters of the turning process in the machining of Aluminum 7075-T651 with a tungsten carbide insert. The input machining parameters are cutting speed, feed, and depth of cut for the output response parameters cutting force, feed force, radial force, material removal, and surface roughness of the workpiece. For optimization of process parameters, the Taguchi method, with standard L9 orthogonal array, is used. ANOVA is applied to obtain significant factors and optimal combinations of process parameters.
    Źródło:
    Production Engineering Archives; 2021, 27, 4; 296--305
    2353-5156
    2353-7779
    Pojawia się w:
    Production Engineering Archives
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Design of grippers for laparoscopic surgery and optimization of experimental parameters for maximum tissue weight holding capacity
    Autorzy:
    Erturk, S.
    Samtas, G.
    Powiązania:
    https://bibliotekanauki.pl/articles/202210.pdf
    Data publikacji:
    2019
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    Laparoscopic gripper
    noncontact gripper
    tissue type
    Taguchi method
    optimization
    Opis:
    Grippers are routinely used to hold, lift and move organs in laparoscopic operations. They are generally toothed to prevent organs from slipping during retention. Organs held by grippers are always at risk of being damaged by the clamping force. In this study, noncontact grippers working with the Bernoulli principle and using air pressure were developed, and vacuum performance was compared in terms of maximum tissue weight holding capacity. For this purpose, Taguchi method was employed for experimental design and optimization, and Taguchi L16 orthogonal array was selected for experimental design. The experimental parameters were 4 gripper types, 4 air-pressure levels (3.5, 4.5, 5, and 5.5 bar), 4 flow rates (2.2, 2.6, 2.8 and 3 m3/h) and two animal tissue types (ventriculus/gizzard and skin). Values from the experimental procedures were evaluated using signal-to-noise ratio, analysis of variance and three-dimension graphs. An equation was obtained by using 3rd-order polynomial regression model for weight values. Optimization reliability was tested by validation tests and the revealed test results were within the estimated confidence interval. The results obtained from this study are important for future studies in terms of organ injury prevention due to traditional grippers in laparoscopic surgery.
    Źródło:
    Bulletin of the Polish Academy of Sciences. Technical Sciences; 2019, 67, 6; 1125-1132
    0239-7528
    Pojawia się w:
    Bulletin of the Polish Academy of Sciences. Technical Sciences
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Optymalizacja parametrów napawania stali C45E drutem CastoMag 4554S z wykorzystaniem metody Taguchiego
    Optimization of Parameters of Pad Welding steel C45E by Wire CastoMag 4554S using Taguchi Method
    Autorzy:
    Woźniak, P.
    Starosta, R.
    Powiązania:
    https://bibliotekanauki.pl/articles/342005.pdf
    Data publikacji:
    2017
    Wydawca:
    Uniwersytet Morski w Gdyni. Wydawnictwo Uniwersytetu Morskiego w Gdyni
    Tematy:
    metoda Taguchiego
    optymalizacja
    parametry napawania
    Taguchi method
    optimization
    pad welding parameters
    Opis:
    Artykuł jest wstępem do serii badań, pozwalających dobrać najlepsze parametry napawania metodą GMA stali C45E drutem CastoMag 4554S. Próbki stali zostały przygotowane oraz wstępnie podgrzane do temperatury 300°C. Plan eksperymentu opracowano na podstawie metody Taguchiego. Celem przeprowadzenia optymalizacji był dobór odpowiednich parametrów technologicznych i uzyskanie najmniejszego udziału materiału podłoża w napoinie. Do analizy wyników wykorzystano regresję wielokrotną oraz metodę Taguchiego.
    The article is an introduction to a series of investigations that will allow to choose the best parameters of pad welding with GMA method of steel C45E by wire CastoMag 4554S. Steel samples were prepared and preheated to 300 degrees Celsius (C). The plan of experiment was developed on the basis of the Taguchi method. The purpose of the optimization was to select appropriate technological parameters and to obtain the smallest proportion of the substrate material in the padding weld. Analysis of the results was performed using multiple regression and Taguchi method.
    Źródło:
    Zeszyty Naukowe Akademii Morskiej w Gdyni; 2017, 100; 187-199
    1644-1818
    2451-2486
    Pojawia się w:
    Zeszyty Naukowe Akademii Morskiej w Gdyni
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Characterization of geometrical parameters of plastic bottle shredder blade utilizing a two-step optimization method
    Autorzy:
    Nguyen, Trieu Khoa
    Chau, Minh Quang
    Do, The-Can
    Pham, Anh-Duc
    Powiązania:
    https://bibliotekanauki.pl/articles/1845034.pdf
    Data publikacji:
    2021
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    plastic waste
    shredder blade
    two-step optimization
    Taguchi method
    response surface method
    odpady z tworzyw sztucznych
    optymalizacja dwustopniowa
    metoda Taguchi
    metoda powierzchni odpowiedzi
    Opis:
    In this paper, a numerical and experimental investigation of geometrical parameters of the blade for plastic bottle shredder was performed based on the Taguchi method in combination with a response surface method (RSM). Nowadays, plastic waste has become a major threat to the environment. Shredding, in which plastic waste is shredded into small bits, ready for transportation and further processing, is a crucial step in plastic recycling. Although many studies on plastic shredders were performed, there was still a need for more researches on the optimization of shredder blades. Hence, a numerical analysis was carried out to study the influences of the relevant geometrical parameters. Next, a two-step optimization process combining the Taguchi method and the RSM was utilized to define optimal parameters. The simulation results clearly confirmed that the current technique can triumph over the limitation of the Taguchi method, originated from a discrete optimization nature. The optimal blade was then fabricated and experimented, showing lower wear via measurement by an ICamScope® microscope. Hence, it can be clearly inferred from this investigation that the current optimization method is a simple, sufficient tool to be applied in such a traditional process without using any complicated algorithms or expensive software.
    Źródło:
    Archive of Mechanical Engineering; 2021, LXVIII, 3; 253-269
    0004-0738
    Pojawia się w:
    Archive of Mechanical Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Optimization of geometric and flow parameters of solar air heater roughened with artificial roughness by Taguchi method
    Autorzy:
    Sahu, Mukesh Kumar
    Mishra, Shivam
    Kumar, Avinash
    Powiązania:
    https://bibliotekanauki.pl/articles/27312207.pdf
    Data publikacji:
    2023
    Wydawca:
    Polska Akademia Nauk. Czasopisma i Monografie PAN
    Tematy:
    roughness
    nusselt number
    friction factor
    Taguchi method
    optimization
    Opis:
    The paper presents the investigation of the optimum design parameters of a solar air heater (SAH) having wire ribs as artificial roughness by using the Taguchi method. The solar air heater has arc shape roughness geometry with apex upstream flow on the absorber plate. The objective of this paper is to obtain a set of parameters that deliver maximum thermo-hydraulic performance. For this objective, a new parameter the thermo-hydraulic improvement parameter (ηTHIP), has been introduced. For the present analysis, the effects of Reynolds number (Re), relative roughness pitch (P/e), angle of attack (α), and relative roughness height (e/Dh), denoted by A, B, C, and D, respectively, have been considered. An (L18 = 61 · 3 2 ) orthogonal array (OA) was chosen as an experimental plan for applying the Taguchi method. The set of control factors for the solar air heater SAH which delivers the maximum Nusselt number (Nu), and minimum friction factor (fr) – are A6B2C2, and A1B1C3 respectively. To obtain the maximum THIP the experimental set-up requires only one single run using the parameter A6B2C2, hence there is no need to run it all 54 times.
    Źródło:
    Archives of Thermodynamics; 2023, 44, 3; 3--33
    1231-0956
    2083-6023
    Pojawia się w:
    Archives of Thermodynamics
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Prediction of the optimum tensile – shear strength through the experimental results of similar and dissimilar spot welding joints
    Autorzy:
    Mahmood, Najmuldeen Yousif
    Powiązania:
    https://bibliotekanauki.pl/articles/140094.pdf
    Data publikacji:
    2020
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    spot welding parameters
    tensile-shear force
    Taguchi method
    optimization
    design of experiment
    Opis:
    Resistance spot welding is the most significant joining technique utilized in various industries, like automotive, boilers, vessels, etc., that are commonly subjected to variable tensile-shear forces due to the unsuitable use of the input spot welding variables, which mainly cause the welded joints failure during the service life of the welded assembly. So, in order to avoid such failures, the welding quality of some materials like aluminum must be improved taking into consideration the performance and weight saving of the welded structure. Thus, the need for optimizing the used welding parameters becomes essential for predicting a good welded joint. Accordingly, this study aims at investigating the influence of the spot welding variables, including the squeeze time, welding time, and current on the tensile-shear force of the similar and dissimilar lap joints for aluminum and steel sheets. It was concluded that the use of Taguchi design can improve the welded joints strength through designing the experiments according to the used levels of the input parameters in order to obtain their optimal values that give the optimum tensile-shear force as the response. As a consequence of the present work, the optimal spot welding parameters were successfully obtained.
    Źródło:
    Archive of Mechanical Engineering; 2020, LXVII, 2; 197-210
    0004-0738
    Pojawia się w:
    Archive of Mechanical Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Influence of flame heating parameters on the hardness of hardened C45 steel
    Autorzy:
    Dargacz, M.
    Starosta, R.
    Powiązania:
    https://bibliotekanauki.pl/articles/244877.pdf
    Data publikacji:
    2018
    Wydawca:
    Instytut Techniczny Wojsk Lotniczych
    Tematy:
    hardening
    flame heating
    multiple regression
    mathematical optimization
    Taguchi method
    hartowanie
    ogrzewanie płomieniem
    wielokrotna regresja
    optymalizacja matematyczna
    Metoda Taguchi
    Opis:
    In this article, the impact of selected parameters of heating using a gas torch on the hardness of hardened alloy steels C45 was presented. The staff of the ship's engine room sometimes uses flame hardening during casual repairs of the machines weared as a result of operational extortions. The purpose of emergency repairs is to restore the possibility of work of ship machinery and equipment for the duration of the vessel's journey. An acetylene-oxygen torch was used to heat the steel. As the analysed parameters of the technological process, the heating time and the distance between the nozzle and the workpiece were selected. The values of the mentioned parameters have been selected so that the temperature of hardened steel is in the range from 800 to 1250 oC. The following values of the adopted machining parameters were used: the heating time was 60, 85 and 110 seconds, while the distance of the torch nozzle was 10, 20 and 30 mm. After heating, the samples were cooled by immersing in water. The research was based on a randomized orthogonal experiment plan. The purpose of the quantitative assessment of the influence of heating parameters on the hardness of hardened C45 steel, done statistical analysis variance analysis, multiple regression and mathematical optimization by the Tagichi method. Conducted tests and statistical analysis showed a significant effect of selected parameters of flame heating on the hardness of hardened C45 steel. The greatest influence on the hardness of the steel is the distance between the nozzle and the workpiece. The highest value of hardness was obtained using the following parameters of flame hardening: nozzle distance 30 mm, heating time 60 seconds.
    Źródło:
    Journal of KONES; 2018, 25, 1; 41-47
    1231-4005
    2354-0133
    Pojawia się w:
    Journal of KONES
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Optimization of friction stir processing parameters of aluminum alloy reinforced with hybrid nanoparticles using the Taguchi method
    Autorzy:
    Ali, Mohammed Sultan
    Al Saffar, Iman Q.
    Powiązania:
    https://bibliotekanauki.pl/articles/27312410.pdf
    Data publikacji:
    2022
    Wydawca:
    Uniwersytet Zielonogórski. Oficyna Wydawnicza
    Tematy:
    stop aluminium
    metoda Taguchi
    tarcie
    aluminum alloy
    friction stir processing
    nanoparticles
    Taguchi method
    ANOVA
    Opis:
    This study deals with the selection of optimum parameters for friction stir processing of Al alloy 6061-T6 reinforced with a hybrid nanoparticle (B4C and SiO2) in terms of their effect on the mechanical properties (hardness, tensile strength, and wear resistance) using Taguchi method. This work was carried out under four parameters each one running in three levels; rotational speeds (800, 1000 and 1200) rpm, travel speeds (10, 20, and 30) mm/min, holes depth (2, 2.5, and 3) mm, and mixing ratio of (SiO2/B4C) nanoparticles (1/1, 1/2, and 1/3), using L9 (34) Taguchi orthogonal array. Tensile strength and microhardness tests were conducted to evaluate the mechanical properties, in addition to the wear resistance test which is carried out using a pin-on-disk device. The microstructure was examined by optical microscopy, field emission scanning electron microscopy, and x-ray diffraction analysis. It was found that the highest tensile strength (223) MPa at 1200 rpm rotational speed, 30 mm/min traverse speed, 2.5 mm holes depth, and 1/2 (SiO2/B4C) nanoparticles mixing ratio, the highest hardness reached is (155) HV, then decreases in the direction of thermomechanically affected zone (TMAZ), heat affected zone (HAZ), and the base material at (1200) rpm rotational speed, (30) mm/min linear speed, a hole depth of (2) mm and (1/3) mixing ratio of (B4C/SiO2) nanoparticles. The wear behavior was of a mild type or an oxidative type at low loads (5 N), which became severe or metallic wear at higher loads (20 N) at fixed sliding time and speed. The (ANOVA) table has been used to determine which parameter is the most significant using MINITAB software.
    Źródło:
    International Journal of Applied Mechanics and Engineering; 2022, 27, 4; 13--25
    1734-4492
    2353-9003
    Pojawia się w:
    International Journal of Applied Mechanics and Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-11 z 11

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