Browsing by Author "Ogedengbe, T.S."
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Item Bio- Agro Waste Valorization and its Sustainability in the Industry: A Review(International Conference on Engineering for Sustainable World (ICESW 2020), 2021-03) Afolalu, S. A.; Salawu, E.Y.; Ogedengbe, T.S.; Joseph, O. O.; Okwilagwe, Osise; Emetere, M. E.; Yusuf, O. O.; Noiki, A.A; Akinlabi, S.AThe application of bio-agro waste in industrial production has become extensive. Many industries have embarked in large scale production due to the broadness in the application of the bio-agro waste. This study vividly and succinctly surveyed the different bio-agro waste, its areas of application and its sustainability in industrial production. Several examples of bio-agro waste have been reported. Their relevance in bio-ethanol production has equally been discussed. More so, current research and development in harnessing the bio-agro waste were equally reported, to achieve better economic sustainability. Thus, the study has provided a new circular economic method for addressing the problems associated with bio-agro waste.Item Chip Morphological Behaviour During Machining Of Ti-6Al-4V Using Refrigerated Soluble Oil(IOP Conference Series: Materials Science and Engineering, 2021-08) Ogedengbe, T.S.; Abdulkareem, S.; Afolalu, S.A.; Ibitoye, S.O.Chips formed during machining are a vital instrument for the assessment both of machinability of material and the effectiveness of the machining method adopted. Various approaches have been proposed by researchers to make machining Ti-6Al-4V easier, ranging from reduction of cutting speed and feed rate to the use of coolant during machining. In this study, investigatation of the effect of refrigerated soluble oil on machinability of Ti-6Al-4V via monitoring of the chips formed during the various machining processes was carried out. The chips formed for various machining conditions were collected using a designed chip receptor medium and was analyzed using a metallographic microscope with an attached stylus. The experiment was planned using central composite designs (CCD) of the Response Surface Methodology (RSM) resulting in a 20 experimental run plan for dry and wet machining. Machining factors considered were cutting speed, feed rate, depth of cut and coolant temperature with corresponding values 40-120 m/min, 0.05-0.20 mm/rev, 0.2-1.0 mm and 5-11°C respectively. Responses monitored chip thickness, tooth profile and peak height. The effect of various factors on responses were discussed. Basically, results show that chip diameter increased with an increase in cutting speed. However, the sawtooth profile on chip reduced with an increase in cutting speed. It was therefore concluded that coolant temperature has an effect on chip morphology during machining of Ti-6Al-4V using refrigerated coolant.Item Comparative Analysis of AISI 1050 Steel Using N5-Soluble Oil and Arachis Oil in Metal Cutting Operation(Proceedings of the 30 th AGM and International Conference of the Nigerian Institution for Mechanical Engineers. Hosted by The Nigerian Institution of Mechanical Engineers, Kaduna, Nigeria, 24 th - 27 th , October, 2017., 2017-10-27) Abdulkareem, S.; Ogedengbe, T.S.; Aweda, J.O.; Khan, A.AThe use of coolant during cutting processes does not only help in the improvement of surface integrity and increase in tool life, but it also facilitates the conservation of energy due to reduction in power consumed during the process. However, some of these coolants affect human health negatively, hence there is need to consider alternatives. The influence of N5- soluble oil and Arachis oil on machinability of carbon steels is reported in this paper. The performance of the use of soluble oil and Arachis oil using flooded cooling approach was investigated in with interest on their effects on temperature at cutting zone, surface roughness, chip formation and material removal rate. The experimental runs were designed using Taguchi L18 orthogonal array using Minitab version 16 and temperature at the cutting zone was monitored using a digital thermometer and a k-type thermocouple wire. Analysis of experimental results was done with focus on percentage contributions of various factors affecting surface roughness and material removal rate and chip profile. It was observed that, the use of Arachis oil as cutting fluid produced a surface finish of 35% improvement compared to soluble oil. Additionally, the chips formed using Arachis oil as coolant is more ductile and continuous than those obtained using N5soluble oil.Item Computer Aided Plant Layout Development for an Aluminum Product Factory.(The Pacific Journal of Science and Technology., 2012) Ogedengbe, T.S.; Adejuyigbe, S.B.; Ismaila, S.O.; Adewumi, B.A.; Ali, D.M.This study presents research into the use of computers as a tool to aid the planning of layouts in factories to reduce daily cost incurred, using developed software. The approach involves identifying and solving plant layout problems (especially closeness relationship problems) thereby generating an ideal layout through the use of computer software which was developed using the programming language known as Visual Basic. A building products fabrication plant in Lagos, Nigeria was used as a case study in the research. It was discovered that the computer software developed (AUTO LAY 2010) could be used to generate alternative layouts which are more effective as it reduced material movement between departments and hence lowered Transportation cost, these ultimately reduces the relative cost of setting up facilities in a company. The results derived from the application of AUTO LAY 2010 to the case study company generated a layout with a cost reduction of ₦500.00, ₦33,000.00, and ₦1,000.00 daily in the office, production, and whole plant sections of the case study factory respectively, resulting in a cost reduction of ₦34,500.00 daily and about N9 million annually. These results show that the use of computer software in modern facility design will not only save costs but also enhance production and thereby increase the profit margins in the manufacturing industry.Item EFFECT OF ANNEALING ON MACHINABILITY OF GREY CAST IRON(Journal of Engineering and Technology, 2018) Ogedengbe, T.S.; Yezeed, O. A.; Yussouf, Abiodun A.This study investigates the influence of process parameter on machined cast iron under varying material strength and cutting conditions. The three process parameters considered in this study are spindle speed (75-135 rpm), feed rate (0.05-0.4 mm/min) and depth of cut (0.01-0.08 mm). The cast iron bars wereannealed and machined under wet and dry cutting conditions. Taguchi design of Minitab 18 was employed to optimize and analyze results. The signal-to-noise (S/N) ratio was used to analyze results generated, identify optimal process parameters (factors) and analyze the effect of these parameters on tool-tip temperature. Results shows that the spindle speed was the most significant factor affecting tool-tip temperature reduction, followed by feed rate, while the depth of cut has least role to play on tool-tip temperature. Depth of cut and spindle speed both significantly influenced increment in material removal rate. The annealed cast iron bar had a better surface integrity than the unannealed sample bars. Conclusively, the preferred condition for machining grey cast iron bar was annealed and wet machining condition.Item Effect of Coolant Temperature on Surface Finish during Turning of Titanium Alloy Ti6Al4(International Journal of Engineering Materials and Manufacture, 2018-12-01) Ogedengbe, T.S.; Abdulkareem, Sulaimon; Aweda, Jacob OlayiwolaHigh temperature generated and stresses induced as a result of turning of Ti6Al4V results in poor surface finish. The aim of this study was to investigate the effect of coolant temperature on the surface roughness of Ti6Al4V which is a core material used as an implant. A cooling system was developed to reduce the temperature of the coolant (soluble oil) from room temperature to 2oC. Ti6Al4V was turned in dry and cooled (at temperatures 5, 7, 9 and 11 oC) conditions. The experiment was designed using central composite design of (Response surface methodology) Design Expert 11.0 to generate an array and optimize the machining parameters. The machining parameters used were cutting speed, feed rate, depth of cut and coolant temperature. Results analyses show that cutting speed and depth of cut had considerable effect on surface roughness of Ti6Al4V. Surface roughness reduced when coolant temperature was reduced. The results of this study shows that turning Ti6Al4V at a very low cutting temperature will ensure a better surface finish.Item Effect of Some Thermodynamic Properties of Cutting Fluids on Machinability of Carbon Steel(FUOYE Journal of Engineering and Technology (FUOYEJET), 2020-09) Abdulkareem, Sulaiman; Babatunde, Moshood A.; Ogedengbe, T.S.; Adegun, Isaac K.Cutting fluids are used to reduce heat generated during machining, however some have been discovered to pose health challenges hence the search for viable alternatives. In this paper, three machining conditions (dry machining, wet machining with soluble oil and wet machining with used-engine oil) were conducted on high carbon steel, with a sole aim of investigating the suitability of engine oil as an alternative to soluble oil. Measurements related to effective use of oil as metal cutting fluids were determined and the machining parameters used were cutting speed (750 – 1750 rpm), feed rate (40 – 120 mm/rev), and depth of cut (0.1 – 0.3 mm). The experimental procedure was formulated using Minitab software version 18 and the machining responses investigated were maximum temperature at the cutting interface, surface roughness, and tool wear rate (TWR). Thermodynamic properties investigated include, flashpoint, specific heat capacity, viscosity and density. The experimental results showed that cutting temperature reduced from an average of 440oK during dry machining to 369.8oK (16% improvement) during machining with used-engine oil and 362.6oK (18% improvement) during machining with soluble oil. The surface roughness produced was generally higher while machining with used-engine oil with an average improvement of 39% in surface integrity. However, when soluble oil was used as cutting fluid, average improvement in surface integrity increased to 70%. Hence, used-engine oil offered impressive lubricating and cooling properties and could replace soluble oil as a cutting fluid during machining.Item The Effects of Heat Generation on Cutting Tool and Machined Workpiece(Journal of Physics: Conference Series, 2019-07) Ogedengbe, T.S.; Okediji, A. P.; Yussouf, A. A.; Aderoba, O. A.; Abiola, O. A.; Alabi, I. O.; Alonge, O. IMetal cutting processes usually cause heat generation at the cutting zone (around the workpiece-tool intersection). The heat generated during these processes may cause different effects on both the workpiece and tool, this in turn may affect the finished product and the general performance of the machined piece. In this study, a review was done on various types of machining conditions available, effects of heat generated on the workpiece and tool, and the approaches adopted to reduce this heat at cutting zones. This study also focuses on the simulation of percentage ratio of heat removal. To handle the simulation, various approaches of heat removal methods were used to get the percentage ratio using the ansys version 19.1 software. It was discovered that heat generation causes two major types of wear on the tool, crater and flank wear, resulting in the reduction of cutting tool life as well as dimensional inaccuracy, surface damage and severe corrosion cases on the workpiece. Various heat reduction methods and coolant application types were as well studied and their merits and demerits were discussed.Item The Effects of Heat Generation on Cutting Tool and Machined Workpiece(International Conference on Engineering for Sustainable World, 2019) Ogedengbe, T.S.; Okediji, A. P.; Yussouf, A. A.; Aderoba, O. A.; Abiola, O. A.; Alabi, I. O.; Alonge, O. I.Metal cutting processes usually cause heat generation at the cutting zone (around the workpiece-tool intersection). The heat generated during these processes may cause different effects on both the workpiece and tool, this in turn may affect the finished product and the general performance of the machined piece. In this study, a review was done on various types of machining conditions available, effects of heat generated on the workpiece and tool, and the approaches adopted to reduce this heat at cutting zones. This study also focuses on the simulation of percentage ratio of heat removal. To handle the simulation, various approaches of heat removal methods were used to get the percentage ratio using the ansys version 19.1 software. It was discovered that heat generation causes two major types of wear on the tool, crater and flank wear, resulting in the reduction of cutting tool life as well as dimensional inaccuracy, surface damage and severe corrosion cases on the workpiece. Various heat reduction methods and coolant application types were as well studied and their merits and demerits were discussed.Item Improvement of ASTM A53 Steel Durability Using Agrowastes as Carburizing Agent(The International Journal of Integrated Engineering, 2021-08-31) Afolalu, S. A.; Ikumapayi, O. M.; Emetere, M.E.; Ogedengbe, T.S.The importance of steel in manufacturing and construction over the past century cannot be over-emphasized and easy accessibility couple with excellent mechanical properties make it preferable over others. However, the problem of durability has posed a serious concern as majority of steel application are meant for long term use. Several attempts have been made to improve the durability of steel in the past and increase of carbon content in low carbon steel was found to be a suitable agent. Although getting carbon is not the challenge rather obtaining it from a sustainable source that has zero environment impact. This research identified two separate agrowaste that has high carbon content the issue of sustainability brought about the development of carburizing agent from agrowaste that are easily accessible namely palm kernel and eggshell which is employed in this research. The use of agrowaste was found to be effective as there was notable increase in grain structure of the carburized steel when compared to the control sample without carburized agent in it.Item Numerical investigation of thermo-physical properties of non-newtonian fliud in a modelled intestine(Journal of Bioresources and Bioproducts, 2020-07-29) Ibitoye, S.E.; Adegun, I.K.; Omoniyi, P.O.; Ogedengbe, T.S.; Alabi, O.O.Several kinds of researches have been conducted on peristaltic flow of non-Newtonian fluid in modelled oesophagus, stomach and intestine. However, further investigation is still needed es- pecially in the area of mechanical shear stress, the influence of inlet temperature and velocity, Nutsselt number and the history of strain rates experienced by fluid particles. This study presents the numerical investigation of thermo-physical properties of non-Newtonian fluid in a modelled intestine. The properties investigated were fluid temperature, velocity, Nutsselt number and wall shear stress. Numerical simulation was performed by solving 3D Navier-Stokes and continuity equations. The intestinal model was drawn by using Autodesk Inventor 2017 while the numerical investigation was conducted by using ANSYS FLUENT 16.0. The Computational Fluid Dynamics solver employs the Finite Element Method (FEM) to discretize the governing equations. Chyme, Hibiscus Sabdariffa Roselle (Sobo), Soymilk (Soya) and Pap (Ogi) were the working fluids used for the investigation. Analyses of the results showed that the variation of fluid temperature and heat transfer with axial position across the length of intestinal model were not significantly influenced by the variation of the inlet velocity. Expansion of the model about the pulsating part enhanced heat transfer and nutrient delivery to the intestinal walls. Variation of the inlet velocity did not affect the average Nutsselt number. Chyme and Sobo had the highest and lowest Nutsselt number, respectively. Sobo displayed the best fluid properties considering flow behaviour while Soya dis- played the best properties for thermal history. The results presented in this study are of countless importance in medical, paramedical, engineering applications, thermoregulation system, ther- motherapy, and biomedical disciplines, where analyses and investigation of gastrointestinal tract history can be understudied.