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2013 - 201910
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Subject: Industrial and Production Engineering × End date: 2019 × Start date: 2010 ×
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Now showing 1 - 9 of 10
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    ThesisItemOpen Access
    Effects of crack branching on fracture parameters under biaxial static loading
    (G.B. Pant University of Agriculture and Technology, Pantnagar - 263145 (Uttarakhand), 2019-09) Saxena, Harshit Kumar; Bisht, Neeraj
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    ThesisItemOpen Access
    Parametric optimization of friction stir welding for Al-Li alloy using Taguchi method
    (G.B. Pant University of Agriculture and Technology, Pantnagar - 263145 (Uttarakhand), 2019-05) Pandey, Rachna; Jadoun, R.S.
    Effect of process parameters on friction stir welding (FSW) process characteristics and mechanical properties of weld joints have been studied. Design of experiment (DOE) approach was applied for understanding the effects of selected FSW process parameters. An L9 orthogonal array was used to investigate the effect of welding speed, rotational speed and tilt angle. An optimum tool profile was selected on the basis of trial runs made prior to final experiments. In the present research, FSW of AA8090 Al-Li alloy has been performed using conventional vertical milling machine. Numerous trial experiments were performed to establish the principal FSW process parameters to be varied during the research to investigate their effect on weld quality. The selection of tool pin, shoulder diameter and material of tool was also done through a number of trial experiments. Welding speed, rotational speed and tilt angle were selected as the FSW process parameters and three levels of each parameter from within the feasible range were considered. The experiments were performed in accordance with Taguchi’s L9 orthogonal array. Mechanical test was performed for every weld specimen. The weld quality was analyzed through tensile tests and hardness tests. The effect of process parameter on weld quality characteristics such as tensile strength and hardness was analyzed. Analysis of results of mechanical tests revealed significant effect of all three FSW parameters on tensile strength and hardness.
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    ThesisItemOpen Access
    Process parameters optimization and experimental investigation of friction stir welded AA1350 aluminium butt joint for thick plates using Taguchi method
    (G.B. Pant University of Agriculture and Technology, Pantnagar - 263145 (Uttarakhand), 2019-04) Tewari, Maneesh; Jadoun, R.S.
    In the present experimental work, friction stir butt welding of thick AA1350 grade Aluminium plates has been taken as basis of research work. As the previous published work shows research work upto 6-7 mm thicknesses, plate thickness of 12.7mm ( above 10mm) was selected for our research work. The three welding parameters- spindle rotation, welding speed and tool tilt angle were considered as input parameters and FSW was performed on 12.7 mm thick AA1350 Grade Aluminium plates. Using Taguchi L9 orthogonal array methodology , the experiments were planned and conducted. Tensile strength, Electrical conductivity and hardness measured on test samples were chosen as output response factors. After doing the trial runs on Universal Milling Machine, three different workable settings for selected parameters were obtained and optimum levels of setting and process variance were achieved by Taguchi method. The confirmatory experiments were later conducted to validate the optimum parameters setting and the results were compared. SEM analysis was performed on good as well as bad samples and defect analysis was done. From the results, it was concluded that: 1) Maximum Tensile strength was found at welding speed of 80mm/min, Tool rotation of 900 rpm and Tool tilt angle of 2⁰. 2) Maximum nugget hardness was found at welding speed of 125mm/min, tool rotation of 560rpm and tool tilt angle of 0⁰. 3) Maximum electrical conductivity was found at welding speed of 125mm/min, tool rotation of 560rpm and tool tilt angle of 0⁰.
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    ThesisItemOpen Access
    Modeling and optimization of Electro Discharge Machining (EDM) process parameters for machining of inconel 600 super alloy
    (G.B. Pant University of Agriculture and Technology, Pantnagar - 263145 (Uttarakhand), 2018-01) Choudhary, Sushil Kumar; Jadoun, R.S.
    In last few years, Inconel 600 superalloy gained much attention of researchers due to its properties viz. high impact strength at room temperature, high hardness, high melting point, high electrically conductivity, corrosion resistance etc. Due to such excellent properties, Inconel 600 superalloy is an ideal choice for the numerous industrial applications, such as manufacturing the components related to aero-engine, spacecraft, nuclear, chemical, food processing, furnace, gas turbine, fixtures, heat exchanger, roller and hearths etc. However, the machining process in Inconel 600 superalloy with traditional machining processes is very difficult due to its poor machinability, high cost and more time consumption. In non-traditional machining processes, electrical discharge machining (EDM) has been regarded as the most efficient for the machining of Inconel 600 superalloy. Many investigations have already been done on the machining of Inconel 600 superalloy with EDM using different electrodes (copper, brass, graphite, molybdenum, copper tungsten). However, the effect of tungsten carbide as a tool electrode, on the machining of Inconel 600 superalloy has not been available in the literature. Therefore, machining of Inconel 600 superalloy with EDM using tungsten carbide as a tool electrode has been presented in this work to determine the effect of different process parameters on the various machining performance parameters. Experimental work has been planned in two phases. In the first phase, parametric optimization of EDM process for performance characteristics performed using Taguchi method. An orthogonal array (OA) L9 was used to conduct the experiments at three levels. Signal to Noise ratio (S/N) and analysis of variance (ANOVA) were employed to study the EDM performance characteristics. Optimization of parameters was done by Taguchi method using statistical software MINITAB-17. Confirmation tests were carried out with optimal levels of process parameters to validate the Taguchi's optimization method. The above results were validated by conducting confirmation experiments. In second phase, mathematical models have been developed for various performance characteristics of the EDM process by RSM using statistical software Design-Expert-9.0. The experiments performed using face centered central composite design and 30 runs were used to conduct the experiments. A standard second-order experimental design called face-centered central composite design (CCD) has been adopted for analyzing and modeling the EDM process parameters for performance characteristics. Predicted optimal ranges of MRR, TWR, WR, OC and SR at 95% confidence level were 30.67 mm3/min, 0.551mm3/min, 2.225, 0.012 mm and 6.684 μm respectively, which were validated by conducting confirmation experiments. Confirmation tests were also carried out with optimal levels of process parameters to validate the desirability function combination with RSM.
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    ThesisItemOpen Access
    Investigations on machinability parameters of 7068 aluminium alloy using tin coated carbide positive rake tool bits
    (G.B. Pant University of Agriculture and Technology, Pantnagar - 263145 (Uttarakhand), 2018-01) Kshetri, Rahul; Ajay
    The current work presents findings from the experimental investigation of the effect of cutting speed, feed rate and depth of cut on the feed force, cutting force and surface roughness, tool wear during turning of Aluminium alloy 7068, by using TiN coated carbide tool in dry condition. There are several dependent and independent parameters involved during orthogonal turning. Independent parameter are cutting speed, feed and depth of cut whereas, dependent parameters are feed force and cutting force components; measured by dynamometer. Due to generation of temperature in different zones, overall effect of temperature on tool tips has been measured by using thermal camera. The investigation is important because Al-7068 is difficult to machine and there is insufficient coverage on its study. Experimental work is carried out with the help of high speed lathe machine followed by measurement of force components and temperature at different input parameters. After machining, tool wear and surface roughness have been measured using scanning electron microscope (SEM) and surface roughness tester. Mathematical model in between all dependent and independent parameters have been developed using RSM. The causes of tool wear and their mechanism are also discussed in the present work. Surface plots are drawn for each mathematical model and their affects in different input parameters are presented with interaction and main affect plots. Tool wear and their mechanism with magnifying views of image are also reported in this work. Recommendations are drawn on the basis of analysis.
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    ThesisItemOpen Access
    Application of heuristics approach for solving the scheduling problem : A case study in TVS Sundaram Fastners Ltd., Pantnagar
    (G.B. Pant University of Agriculture and Technology, Pantnagar - 263145 (Uttarakhand), 2013-07) Singh, Sandeep; Jadoun, R.S.
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    ThesisItemOpen Access
    Optimization of MIG welding parameters of dissimilar metals using Artificial Neural Network (ANN) and Genetic Algorithm (GA)
    (G.B. Pant University of Agriculture and Technology, Pantnagar - 263145 (Uttarakhand), 2013-07) Amit Kumar; Jadoun
    Welding is a process by which we can join two similar or dissimilar metals very efficiently. With the help of welding, success of the weld can be achieved up to 100%. Welding is more useful because it is less costly as compared to other fabrication process like casting, forming, machining. In this study dissimilar metals of stainless steel of grade 304 and stainless steel of grade 316 are used in this study. We make 27 samples at different levels. Metal inert gas (MIG) welding is used in this study for welding because MIG welding is automatic machine and even less skill worker can operate it. Phoenix 301 MIG welding machine is used for welding. Joint strength is determined using the universal testing machine (UTM). In this study Artificial neural Network is a very important tool which relates input and output.. For classification Artificial Neural Network was built which shows some inter relationship between Input and Output parameter. ANN work similarly as biological neuron does work. GA is used to optimize selected MIG welding parameters input parameter (voltage, welding speed and current) and output parameter (tensile strength). Artificial neural network and Genetic Algorithm is used to design the experiment. The results were analysed using Artificial Neural Network (ANN) which is a part of MATLAB for the optimal parameters GA tool used which also a part of MATLAB. MIG welding is also known as metal inert gas welding and gas metal-arc welding (GMAW). Gas metal arc welding (GMAW) is widely used in industry due to its high metal deposition and ease of automation with better weld quality.
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    ThesisItemOpen Access
    Experimental study of mechanical and thermal properties of Bhimal fiber reinforced epoxy bio-composite
    (G.B. Pant University of Agriculture and Technology, Pantnagar - 263145 (Uttarakhand), 2017-07) Upreti, Bikraj; Chaudhary, A.K.
    Bio-composites are putting forth a concentrated effort in almost every engineering field due to their cost viability and biodegradable nature. In a huge variety of natural fibers, bhimal fiber is a very promising fiber that still needs to be explored as an engineering material, because it has very rarely been used by researchers in their research work. Bhimal fiber is a cellulosic fiber extracted from the stems of bhimal tree. It has a great tensile strength and flexibility. In present work bhimal fiber reinforced epoxy bio-composite was successfully prepared by hand lay-up casting technique in order to examine its mechanical and thermal properties for varying content of bhimal fiber ( i.e. 2, 3, 4, 5 & 6 weight % ). Before the preparation of composite, the surface of bhimal fiber was treated with potassium hydroxide to improve its adhesion properties. From the experiments it was observed that while increasing the fiber content up to 5 wt%, the tensile, flexural and compressive strength continuously increased then started decreasing. Similarly hardness and impact strength were also observed to be increasing up to a peak value at 4 wt% of bhimal fiber. All these results were supported by the SEM, TGA and DTA results. From the observations, it has been concluded that the bhimal fibers are lighter in weight than all existing fibers and strength to weight ratio of the bhimal fiber reinforced epoxy bio-composite is quite higher than the other conventionally used natural fiber based composites. Hence these can be used as reinforcement to produce much lighter weight bio-composites.
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    ThesisItemOpen Access
    Development of quality audit templates for monitoring and improvement of quality & performance of a process
    (G.B. Pant University of Agriculture and Technology, Pantnagar - 263145 (Uttarakhand), 2017-08) Pramod Kumar; Ajay
    A major of portion of economy of our nation comes from Indian agriculture and unorganized industrial sector. A major percentage of Indian agriculture is also being carried out in an ill articulated and unorganized manner leading to small land size, loss of crop, lower yield, unavailability of potential market, untimely operations, and pressure of debt on farmers. Main features of unorganized working are no accounting, unplanned working, no record keeping, poor efficiency, waste generation, etc. The same mistakes are kept on repeating resulting to cumulative financial loss and failure of the system. Presently implementation of GST and other measures taken by the government are forcing to all business organization to maintain their records properly & pay taxes. This is possible only when organizations which belong to unorganized sector will turn to become organized by virtue of their working procedure. In this work suitability of use of existing quality control tools is examined for this purpose their associated difficulties are pointed out. It is purposed to use quality audit templates in addition to other quality control tool to make the unorganized sector an organized one. This can maintain proper records, reduction of waste and improvement of efficiency. This also enables the organizations to pay taxes in proper manner for national growth. This work includes development of three quality audit templates, self monitoring quality audit template, performance audit template, customized quality audit template. The logical procedure of development of these templates using related input information is described in results and discussion. It is recommended that the same procedure can be applied to develop other similar audit templates. Analysis of templates to draw fruitful conclusions for process improvement is also described. This description also includes important factors stating the possibility of failure of use of these templates. Use of the templates is recommended for achieving objectives of efficiency and performance improvement and turning the working of unorganized sector into an organized one.