Theses (Department of Mechanical Engineering)
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Theses collection of the Department of Mechanical Engineering. The collection was started in 2023.
At the University of Debrecen, in accordance with the 2022 amendment to the 2011 Higher Education Act, student theses are only accessible from devices connected to the University's Eduroam WiFi network or from a university IP address.
“The thesis or diploma work of a student who has successfully passed the final examination shall be stored in full in the academic system of the higher education institution, and a record shall be maintained thereof. The stored theses and diploma works – with the exception of parts classified as confidential in accordance with the relevant legislation – must be made accessible and searchable without restriction through the academic system.” Further info on the National Higher Education Act in Hungarian: Felsőokt. tv. (új) - 2011. évi CCIV. törvény a nemzeti felsőoktatásról - Hatályos Jogszabályok Gyűjteménye.
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Tétel Korlátozottan hozzáférhető 3D scanning and manufacturing design of an engine pistonNi, Gaoyuan; Bodzás, Sándor; DE--Műszaki KarThe main objective of this thesis consists of developing a three-dimensional (3D) model of a piston head using Computer Aided Design (CAD) software. Although AutoCAD software is primarily focused on two-dimensional (2D) applications, it was chosen for this thesis because of its ability to generate 3D models as well. After completing the 3D model using the computer-aided design (CAD) software, I traveled to the lab and utilized the 3D scanning equipment to capture the physical piston head. I then performed a comparative analysis of the aforementioned 3D model and the scan results with the aim of identifying any potential discrepancies or inaccuracies. This stage was completed with the help of Mr. Dániel Nemes, who provided invaluable assistance throughout the process. Initial comparisons showed significant differences between the produced and scanned 3D models. Therefore, I optimized the accuracy of the piston head 3D model by optimizing it. Subsequent analysis showed that the error of the improved model was below an acceptable threshold. The third objective of this thesis was to develop a machining process for the piston head using EdgeCAM software. Proficiency in milling and turning machining techniques was achieved by exploring the relevant PDF learning resources available on the official EdgeCAM website and by utilizing instructional videos available on the Internet. During the initial design phase, I realized that the unique composition of the piston head did not allow for the use of only milling or turning methods in the machining process. Therefore, it was decided to use Solidworks software to divide the 3D model of the piston head into different parts. The upper portion of the piston head was manufactured utilizing turning machining techniques. The upper part of the piston head is manufactured by the turning machining process while the lower part of the piston head is manufactured by milling machining process. At the initial stage of the design process, it is vital to determine the appropriate blank for the machined object. Subsequently, fixtures and machine tools must be set up accordingly. The EdgeCAM 3D model is then utilized to determine the specific features to be machined. Finally, the machining design is carried out, including determining the relevant cutting tools, the type of machining (e.g. rough turning, rough grooving, finish grooving) and the specific type of machining based on the feature to be machined. In turning, different operations such as rough turning, rough grooving, finish turning, finish grooving, and cut-off require the adjustment of specific parameters for each operation. Similarly, milling encompasses a variety of machining techniques, including roughing, contour milling, and face milling. The final goal was to optimize the machining process design. I successfully optimized the milling process for the lower part of the piston head on two occasions, reducing the machining time from 51 minutes to 13 minutes the first time and 9 minutes the second time.Tétel Korlátozottan hozzáférhető An Output Power-levelling in Wind Energy Conversion SystemDemberel, Odmaa; Nemes, Dániel; DE--Műszaki KarThis research focuses on the critical challenge of output power-levelling in Wind Energy Conversion Systems (WECS), specifically addressing the application of Doubly-fed Induction Generators (DFIG). In the context of the global transition toward renewable energy, the optimization of wind energy systems is paramount to ensuring efficiency and reliability. The significance of this research lies in its direct impact on the operational stability and performance of DFIG-based wind turbines, a technology extensively utilized in modern wind farms. Power fluctuations, particularly in varying wind conditions, pose a significant obstacle to the seamless integration of wind energy into the power grid. The primary objective of this research is to provide a comprehensive understanding of the control system of DFIG wind turbines, with a specific focus on its capabilities during fault conditions, namely voltage dips. The investigation employs a dual approach, combining theoretical modelling and simulation models to analyse and understand the normal operation of DFIG systems. The simulation model, with an emphasis on the wind turbine model, serves as a powerful tool for comprehending the intricacies of the system under steady-state conditions. Theoretical models establish a foundational understanding of the DFIG system's behaviour during normal operation, offering insights into the interplay of various components, such as power converters and control systems. Simulation models, on the other hand, provide a visual representation of the DFIG system's behaviour, particularly the wind turbine model, enabling a dynamic exploration of the system under normal operating conditions. The visualization of signals and behaviours during steady-state conditions serves as a crucial reference point for further analysis. This understanding becomes pivotal when examining the system's response during voltage sags and other operational circumstances. This research not only contributes to addressing the challenge of output power-levelling in DFIG-based wind turbines but also enhances our understanding of their behaviour under varying conditions. The combination of theoretical insights and simulation results provides a comprehensive framework for optimizing the control systems of DFIG wind turbines, ultimately contributing to the reliability and stability of wind energy systems in the broader context of renewable energy integration.Tétel Korlátozottan hozzáférhető Analysis and development of shop floor management in a unique manufacturing companyOjogbo, Udehmaguna David; Matkó, Andrea Emese; DE--Műszaki KarThis thesis investigates the various methodologies and intricacies involved in the operation of the shopfloor in a manufacturing company. The study focuses on Burkle Hungary kft, and their unique approach to production and tackling various operational and technical challenges involved in maintaining a well-functioning production line, as well as developing on the current ones. The importance of understanding the broad picture of the shopfloor and how it operates cannot be over-emphasized, as this dictates the smooth flow of activity across the entire production and monitors the quality and efficiency of the current processes. An in-depth analysis of the Quality, Cost, Delivery, Safety and Morale (QCDSM) technique, as used by the manufacturing company is the cornerstone of this research, along with various underlying principles and methodologies associated with shopfloor-management. A series of observational studies and analysis of company material was conducted, coupled with a comprehensive review of the relevant literature in the field of production, management and engineering processes. The benefits of the analysis of the shop floor process lies in having a much more holistic view of how the production line works, and in so doing, an improved material flow, as well as information flow occurs on the shopfloor, losses are uncovered quickly and analysis of productivity and efficacy with the help of visual management tools, is made simple, direct and effective. Information flow is crucial in ensuring operations are run smoothly, this flow of information and material bridges the gap between technicians and managers, this research shows how effective information flow coupled with the various lean techniques and methodologies, can lead to an improved and more efficient production line.Tétel Korlátozottan hozzáférhető Analysis and Testing of 3D models and infillsGillani, Syed Musa Hassan; Balogh, Gábor; DE--Műszaki KarIn the thesis work, you will be learning about the general effects of Infills. Measurements of each infill such as the general stress and strain have been calculated. Anycubic Kobra 3D printer and Anycubic 3D PLA filament are used for the tests. Furthermore, each infill in the software Ultimaker Cura has been used. Ever since the start additive manufacturing has faced many problems. Some of them include an overhang layer, materials not bonding together properly, and not enough knowledge of the infills and the effects, such problems affect the print quality and have increased defects. The main purpose of this thesis is to understand the effects of each infill where they can be distributed and used in different objects. This can help us reduce the amount of material we use and, in some cases, infills can also reduce the time taken for something to manufacture. The 3D printing technologies with defined infills and uses can expand easily, and such infills can further be integrated into multiple software and help in part optimization. To understand the effect properly, I designed 2 Tests with different properties. The properties included layer heights, wall layer counts, infill density, and top and bottom layer thicknesses. These properties were changed for the tests and the results were observed for differences. After reducing the layer counts and allowing the infill to have more space in the test sample the results were observed. A tensile testing machine with an integrated optical image camera to measure the accurate strength and strain of the materials was used. The final results were compared and the infill effect. The effect of walls was also observed in each test where reducing the wall count more space was available for the infills and a larger difference with results completely dependent on the infills was observed.Tétel Korlátozottan hozzáférhető Analysis of mechanical response of Ti-6Al-4V lattice structures using finite element methodZhang, Haochen; Mankovits, Tamás; DE--Műszaki KarWith the advent of the Fourth Industrial Revolution, the demand for lightweight, high- performance materials is increasing across various industries, including aerospace, automotive, construction, and medical bio-implants. These sectors are placing higher demands on the mechanical properties of structural materials. Lightweight materials have become crucial for improving energy efficiency and environmental performance. However, conventional material structures often struggle to meet both lightweight and high-strength requirements. Consequently, the development of innovative lattice structures to enhance material properties has emerged as an important area of research. In this study, we employed the controlled variable method to ensure that different structures were compared under consistent conditions, minimizing the influence of external factors and ensuring the accuracy of the experiments. We first modeled and analyzed four different lattice structures. Finite element analyses were conducted using ANSYS software to evaluate the impact of their fill rates on mechanical properties and identify the most suitable lattice types for multidisciplinary applications. The modeling was executed in ANSYS SpaceClaim, followed by finite element analysis in ANSYS Workbench. A thorough evaluation of stress distribution, strain, and other relevant factors was performed for each generated structure. The analyses aimed to assess how fill rate influences the mechanical properties of the lattice structures in this study. Each of the four designs featured different lattice cell shapes and fill rates, while the length of the lattice structure was kept constant to ensure a valid comparison across all types. For this research, we selected Ti-6Al-4V, the most commonly used material in additive manufacturing. We determined the stress-strain characteristic diagrams for the four types of structures: simple cubic lattice, center-supported lattice, side-crossed-supported lattice, and lateral-diagonal- supported lattice. Additionally, we calculated the effective Young's modulus for each case and performed a comprehensive comparison and analysis of the simulated values. The results revealed significant differences in the mechanical behavior of each lattice structure at various fill rates. We found that the simple cubic lattice and the center-supported lattice are effective for mimicking human cortical bone at low fill rates. In contrast, the lateral cross-supported lattice demonstrates high performance even at a 50% fill rate. This lateral cross-support lattice exhibits a high Young's modulus, making it suitable for high-strength applications, such as metal implants. However, its high modulus of elasticity deviates significantly from the elastic properties of natural bone, which must be considered in biomaterial design. Side-to-side diagonal support lattices showcase excellent stiffness and deformation resistance at high fill rates, rendering them suitable for applications like spinal braces and other support devices. For industrial uses, the lateral cross-support lattice is appropriate for gas turbine fan blades, while the lateral diagonal support lattice is ideal for UAV wing designs at a 70% fill rate, as it combines high stiffness with lightweight requirements. Our findings underscore the varying applicability of different cell structures at various fill rates, providing valuable insights for material design and optimization.Tétel Korlátozottan hozzáférhető Analysis of Spur Gear Design Parameters and Surface Finish for Robotic ApplicationAbdelfattah, Sama Khaled Abdalla; Bodzás, Sándor; DE--Műszaki KarSurface roughness plays an important role in machine performance. The scope of the study discusses the parameters that need to be considered when studying gear surface roughness and what their values mean in robotic applications. It also discusses how gears are manufactured and what the most important processes in gear production are, as well as evaluates the labor productivity of each process. The Smartic M device is a surface roughness measuring tool that is used for the purpose of measuring the surface roughness of spur gears. Measurements have been obtained and narrowed down to the most optimal and the least optimal results. The study established a standard that any Ra value greater than 0.8 μm and any Rz value greater than 10 μm is simply unacceptable. These ranges have been determined in regards to robotic applications. An analysis of the ranges of obtained results was further narrowed down so that an assessment could be made of the effectiveness of the mechanism if the quality of its surface finish was either efficient and to optimal levels or inefficient and problematic, as well as how an industrial robotic arm would behave if the said spur gear was utilized in its system. The study then delved deeper into spur gear manufacturing in order to investigate what optimal mass-produced spur gears would look like in a production system. To do this, the Tecnomatix Plant Simulation software was used to set up CNC, drill, hobbing, heat treating, and grinding stations to produce a mass of spur gears similar to the sample gear that constituted the design of this study. The labor productivity statistics of all of these stations was evaluated during the study and the results were satisfactory in terms of similarity to the gear manufacturing analytical system. Another production system was developed on the plant simulation software, however, it was for the purpose of studying the performance of a robotic arm when its level of efficiency is drastically reduced and when it is somewhat efficient. The results of the simulation showcased that it would be quite realistic for a robotic arm to have an availability rate of 89%, but it would be completely unacceptable for the availability rate to be 48% as that would be contingent to a failure rate that exceeds 50%, which is problematic for any manufacturing system to possess such an inefficient tool in its line.Tétel Korlátozottan hozzáférhető Analysis of the Correctness of the Twist Drills by Tool Measurement SystemTan, Rong; Bodzás, Sándor; DE--Műszaki KarThis thesis evaluates the accuracy and wear of twist drills using an advanced measurement system. Key parameters such as drill point angle, cutting edge symmetry and outer corner radius were analysed. The performance of the drill was significantly improved by resharpening, but still deviated. The results of the study provide recommendations for improving machining efficiency and ensuring consistent quality.Tétel Korlátozottan hozzáférhető Analysis of the selection and review of suppliers in Burke HungaryKhazrati, Heidar; Matkó, Andrea Emese; DE--Műszaki KarThe success of any manufacturing company heavily relies on the efficiency and dependability of its supply chain. This study focuses on the aspects of selecting and evaluating suppliers specifically looking at Bürkle Hungary, a company that faces challenges due to relying on a single supplier for an important component called the Cast Part. The main goal of this study is to provide an analysis of supplier management strategies emphasizing the significance of diversifying suppliers and conducting thorough pre-qualification assessments to improve the resilience and performance of the supply chain. "One key element for a supply chain is strategic supplier management." This research dives into the complexities involved in identifying suppliers assessing the risks associated with relying on a source for supplies and explores best practices for broadening one’s supplier base. It also evaluates how advanced technologies such as AI, blockchain and IoT can modernize supply chain operations. The thesis investigates the challenges faced by Bürkle Hungary in maintaining a consistent supply of the Cast Part and assesses how well the company performed before and after implementing recommended supplier management strategies. The study addresses challenges encountered by Bürkle Hungary during their transition, to a diversified supplier base. These include helping employees adapt to procurement processes providing comprehensive training programs and integrating technological solutions into their supply chain operations. The study suggests that by diversifying suppliers utilizing technology effectively and conducting thorough supplier assessments a company can enhance its supply chain performance. However, achieving these improvements requires dedication and a long-term commitment to ensure the sustainability of these changes. Although there may be obstacles, this strategic shift in supplier management holds the potential to enhance operational efficiency and promote greater stability, within Bürkle Hungary supply chain.Tétel Korlátozottan hozzáférhető Analysis on the accuracy of virtual clamping in the field of the 3D scanningMurtaza, Ali Haider; Hajdu, Sándor; DE--Műszaki KarVirtual clamping, a technique that simulates deformations during clamping, has been introduced to measure large and flexible parts in a free state. This method reduces inspection time and costs, but the reliability and accuracy of this method are still being evaluated. The goal of this thesis is to perform 3D scanning on actual mechanical parts and I have selected impeller parts. I used a Powershape scanner to accurately scan impellers with thin-walled wings and SOLIDWORKS software for scan data modeling.Tétel Korlátozottan hozzáférhető Application of AI in Autonomous VehiclesNaat, Yacine; Menyhárt , József; DE--Műszaki KarThis thesis is about the innovation of the various Application of AI in Autonomous Vehicles with a focus on the lane detection technology. Investigating the crucial task of precisely identifying and tracking lane boundaries, which is essential to facilitate secure and efficient self-driving navigation. This study comprises a thorough examination of existing literature related to algorithms used in detecting lanes with particular emphasis on computer vision and machine learning methods. The research, via experimental analyses evaluates the state-of-the-art algorithms' performance under diverse real-lifelike scenarios in virtual or simulated eviroment. Through the use of simulations, the thesis aims to evaluate how lane detection python algorithms utilising machine learning libraries respond to different conditions and road layouts and how modern machine learning models and AI trends can be harvested in the automotive industry. The research involves the use of a simulated environments mimicking real-world conditions, allowing for controlled experimentation and analysis. The challenges of real-world deployment occlusions, dynamic road conditions and diverse lane markings types are emphasised. The thesis also investigates how dependable can lane detection algorithms be, by monitoring the accuracy and error margin values with each training and observing the simulated car behaviour. Acknowledging a crucial need for robustness and versatility within autonomous navigation systems is given special attention in this thesis. Additionally, the thesis discussed the advantages and limitations of using simulated environments for testing and validating lane detection algorithms compared to real-world testing. Consideration of ethical and safety implications in the transition from simulation to real-world deployment were taken into consideration. In conclusion, the thesis end result showed a high-accuracy prediction of the lane detection developed for this project within the simulated environment, offering valuable information for researchers and developers working on autonomous vehicle systems. The findings contribute to the understanding of how well these algorithms perform in controlled, virtual settings, aiding in the refinement and optimization of lane detection systems for future real-world applications.Tétel Korlátozottan hozzáférhető Assembly design and finite element analysis of a basketball rimDaniel, Uduoise Osemudiamen; Bodzás, Sándor; DE--Műszaki KarDuring the course of the educational presentation although how tedious the compilation of documents publications and books seem, I was able to learn more about to perform and render 3d and 2d models with the aid of computer aided software like solid works. And there take said design and work to analyzed through the finite element analysis method in other to truly understand the importance intricates and complexity of material selections. Now I would like to talk about the ideal rim. The ideal rim remodification I would say is the first the backboard. The rim breakaway or breakaway rim was designed with the same ideology of the flexible rim but with the exception of the movement of a joint in the pivot of the connection between the board and rim. The breakaway rim is created to fix two main functions namely to maintain the same rebound characteristics of the rigid rim to ensure consistency of play and the fact fair play is involved. And secondly to absorb the great impact of the weight of players when they hand on the rim or pull sharply on it. In other to perform this role to the maximum we will need to combine the rigid and flexible rim mechanism creating the perfect rim.Tétel Korlátozottan hozzáférhető CFD Analysis of Aerodynamics Drag Reduction and Improving Fuel EconomyFarooq, Umar; Hajdu, Sándor; DE--Műszaki KarThe main objective of this thesis is to examine and analyze the effects of several aerodynamic modifications on truck model drag reduction and fuel consumption using Computational Fluid Dynamics (CFD) simulations. The study began by Ahmed body standard for guaranteeing the precision and reliability of simulations to validate the CFD model. After the successful validation process, a created a CAD model of truck and modified by different aerodynamics attachments and achieved results by CFD analysis, aimed to decrease drag and improve fuel efficiency. At first the coefficient of drag (Cd) value for the base truck model was 1.209. By implementing the initial set of modifications which included gap filling and front fairing drag coefficient was lowered to 1.065 and resulted in an 11.91% reduction in drag. Further aerodynamic modifications included the teardrop shape, resulted in further coefficient drag was lowered 1.075 and the percentage of drag reduction slightly decreased at 11.08%. In the addition of tail fairing in together with the previous modification the result was more significant in drag reduction with Cd falling 0.861 and 28.78% reduction. Ultimately the whole truck design including the front fairing, gap filling, teardrop, tail fairing, and side skirts, resulted in the lowest drag coefficient of 0.840, the overall drag reduction of 30.52%. The drag equation, which considers the truck's density, velocity, and reference area, was then used to obtain the drag force values: FD = 0.5×ρAV2CD. The drag forces were used to calculate the fuel consumption per 100 km using L/100km=0.008051×𝐹𝐷. With each attachment modification the result demonstrated reduction in fuel consumption. The basic model showed no fuel savings. However, with modification of the front fairing and gap filling fuel saving of 2.840 L/100km was achieved. Further teardrop modification fuel consumption was reduced with 2.636 litters savings per 100 km. By combining the front fairing, gap filling, tail fairing, and teardrop modification resulted were achieved fuel saving 6.857 L/100km. Finally, the completely modified truck model demonstrated the highest potential for fuel saving 7.272 liter per 100 km.Tétel Korlátozottan hozzáférhető Comparative analysis of noise emitted by accelerating road vehicles of different engine typesAl Burini, Akram Maher Fawzi; Kocsis, Dénes László; DE--Műszaki KarNoise is being generated more and more everyday from different factors in the world but the most generating to it is the road traffics that is causing many problems for the environment especially the humans as it puts them in health danger were they can have some disabilities such as hearing problems and also mental health problems where they can not have tranquillity.This study will focus on the studying different type of vehicles with different engines based on the International Standard Organization to find out which type of vehicles is the safest for the environment, moreover what are the most factors generating the noise so later on the vehicles manufacturers will take that in consideration and work on improving it such as higher quality of noise absorbing material used in different part of the vehicles.Tétel Korlátozottan hozzáférhető Comparative analysis of Plasma and TIG weldingNkalanga, Comfort Deon; Pálinkás, Sándor; DE--Műszaki KarThe objective was to compare plasma and TIG welding at macrolevel and micro level for both of the welding processes. In order to be able to do analyses for both of the welding processes based on their differences, similarities,disadvantages and advantages to be able to understand that which welding process is best suitable for what type of welding condition.The experimental specimens which were made of mild steel were put under both tensile and compression stress through bending.They were then analyzed on how they responded to the stresses.The emphasis was on the reaction on the joint area where the fusion of the weld was made.The results found can be applied on practice, because the experiment was conducted based on things that normally occur during the use of the welding processes.Tétel Korlátozottan hozzáférhető Comparison and evaluation of energy storage systemOgunmola, Ifeoluwa Opeyemi; Szendrei, János; DE--Műszaki KarEnergy storage has been a challenge right from the beginning of the renewable energy revolution, The popularity of intermittent renewable energy is growing, as the storage of fixed and mobile energy continues to be a crucial area of focus. Electricity is not capable of being stored, but it can be transformed into other forms of energy that are capable of being kept. These stored forms of energy can then be converted back into electricity as needed. Energy storage systems can utilize many technologies such as electrochemical in form of batteries, supercapacitors, Mechanical in the form of flywheels, CAES, and Pumped hydro, thermal modules, Superconducting magnetic, power to gas and hybrid systems. This study compares and evaluates the battery storage options through meticulous sizing calculations, clarifying the relationship between capacity, power, efficiency, and lifetime factors especially with regard to the recently implemented Solar Plusz Program (Napenergia’24), and power to gas, potential and hybrid storage options with the use of some formulars and calculations to consider the sizing of these technologies and compares the criteria needed for sizing. The review that was carried out shows that a hybrid energy storage system performs better in terms of microgrid stability and reliability when compared to applications that use a simple battery energy storage system with case studies. Hybrid energy storage system (HESS) is the best option for energy storage because a single energy storage system cannot meet every demand at once. So, choosing the right combination of storage solutions is essential for a system design that is cost-effective.Tétel Korlátozottan hozzáférhető COMPRESSION TESTING AND ELASTICITY LIMIT CURVE GENERATION OF 3D PRINTED CELLULAR STRUCTURESTahmid, Ahnaf; Balogh, Gábor; DE--Műszaki KarThis thesis investigated how different infill patterns and densities affect the compressive behavior of 3D printed Thermoplastic Polyurethane (TPU) structures. The study started with a literature review, followed by detailed chapters covering failure types, sample preparation, compression testing, and result analysis. Common failure modes in 3D printed structures are categorized into mechanical, structural, print quality, and material-specific issues, primarily caused by improper parameters or incompatible designs. These insights guided the accurate preparation of samples in the next phase. Cylindrical specimens were designed according to ASTM D575-91 using SolidWorks and printed using an FDM printer with six different infill patterns and two density levels. In total, 36 samples were tested under compression of 2 mm and 10 mm using the INSTRON 68TM-10 machine. Data such as maximum force, displacement, and dimensional changes were recorded. Stress-strain curves were generated to show how different infill settings impacted compressive strength. Error functions confirmed the consistency of results, supporting repeatability. The study concluded that higher infill densities generally led to greater resistance to deformation, and infill type had a significant effect on mechanical behavior.Tétel Korlátozottan hozzáférhető Computational Fluid Dynamics Analysis of Tesla CybertruckElzamar, Mostafa Ahmed Mostafa Mohamed; Szodrai, Ferenc; DE--Műszaki KarThis thesis investigates the aerodynamics of the Tesla Cybertruck, with a focus on enhancing its overall efficiency. Objectives include a detailed analysis of airflow patterns and drag forces, employing advanced computational fluid dynamics (CFD) techniques. The study addresses existing gaps through a literature review, drawing insights from analogous geometries and drag reduction studies on pickup trucks. Methodologically, precision mesh generation techniques such as double precision, local sizing, and curvature meshing are applied. The simulation setup is rigorously validated through sensitivity studies and comparisons with Numeric Systems GmbH, establishing the reliability of the methodology. Tasks encompass the examination of separation bubbles, sharp edges, wake dynamics, and vortex shedding patterns, contributing to a comprehensive understanding of Cybertruck aerodynamics. The conclusion highlights key findings derived from the analysis. The identification of a separation bubble at the front of the hood and the impact of sharp edges on airflow dynamics provide valuable insights. The study reaffirms its credibility through comparisons with Numeric Systems GmbH, showcasing the robustness of the simulation methodology. The results contribute not only to academic knowledge but also hold practical implications for optimizing the Cybertruck's performance. The applicability of these findings extends to the broader discourse on electric vehicle design, offering insights for practical design strategies to enhance performance and efficiency.Tétel Korlátozottan hozzáférhető COMPUTER AID OVERALL MANUFACTURING DESIGN OF A COVER BOX OF GEAR DRIVEZhang, Guanghao; Bodzás, Sándor; DE--Műszaki KarIn industrial installation, shell parts are an important part of supporting and containing other parts, carrying fixed screws, shafts, shaft bearing or box bodies and other phase parts, and the structure and force ratio are more complex. The structure around the shell is usually arranged with concave groove, convex, table, shaft hole, bolt hole, vent hole and so on. In addition, during the transmission process, the shell will be affected by the weight load of each component, or long-term vibration, so it is easy to cause damage. Because of this, the processing quality of the shell is very important, which directly affects the operation precision and service life of the machine, and the quality of the shell parts directly affects the entire complex transmission system and working machine. Shell parts are mostly cast parts. This paper takes a reducer shell part as the research object, through the creation of CAD model and geometric shape research, and carries out the development of processing technology and several kinds of technology comparison, in order to improve the processing efficiency and processing stability, improve the quality of products in production. The reducer is a power transmission device used between the prime mover and the working machine. As shown in the figure, it is a typical cross-section view of the reducer structure, from which you can see that the reducer housing is the installation basis of the internal transmission parts of the reducer, which plays an important role in fixing the transmission shaft, ensuring the accuracy of gear operation, storing, providing lubrication and cooling oil during gear operation, and preventing dust from entering. In the field of reducer design and manufacturing, the use of CAD and other technologies for simulation and improvement can speed up the improvement process, shorten the improvement cycle, improve the quality and reliability of parts to create good economic and social benefits.Tétel Korlátozottan hozzáférhető Design analysis and optimization of helicopter rotor headYabaneri, Yigit Arda; Hajdu, Sándor; DE--Műszaki KarThis thesis is an overview of the design process of an assembly. It includes the design, Analysis, Optimization, and Materialization of a Helicopter Rotor Head. Designing the Main Helicopter Rotor-Head using modern design software. Followed by Optimization according to Computational Analyses. Finally, the materialization of the optimized assembly by additive manufacturing.Tétel Korlátozottan hozzáférhető Design and Additive Manufacturing of a Flat Form ToolRahman, Shahbaz; Bodzás, Sándor; DE--Műszaki KarThe focus of this in-depth study is largely on the application of additive manufacturing in the creation of a flat form tool; an integral component utilized in several engineering applications. The study progresses with a holistic approach where each stage lends itself to the more broad-scope objective of reimagining the process of tool production through advancements in 3D printing technologies. Initially, the study embarks upon an in-depth analysis of the flat form tool, from both a constructional and analytical perspective. Essentially, this aspect lays the basis for the forthcoming design stages and the actual production methodologies. Furthermore, this study encircles the creation of CAD models for both the tool and the workpiece. The entire layout procedure enlists sophisticated modelling patterns tailored specifically to enhance precision and maximum functionality to develop models. Thus, paving the path for an efficient production process attuned to accuracy. Following the design phase is the actual operationalization of additive manufacturing of the tool. The Ultimaker 3, 3D printer is pressed into service, using PLA (Polylactic Acid) material, for manufacturing the tool. The Ultimaker Cura Slicer Software has been utilized to transform intricate digital blueprints into precise physical entities, with efficient material usage. Lastly, a finite element analysis (FEA) is performed on the produced tool to gauge its performance amidst operational situations. The results of this evaluation offer vital understanding of the tool’s mechanical idiosyncrasies, thereby aiding the ratification of design selections and corroborating functionalities along with resilience. Overall, this thesis proves conclusively that additive manufacturing holds viability and obvious benefits when it comes to producing tools tailored for unique requirements. Ultimate power of 3D printing in transforming tool production shouldn’t be neglected as it offers flexibility, waste minimization and heightened productivity. The study marks a potential ground breaker in its domain, revealing an all-encompassing mechanism to tool formation and manufacturing. By doing so, this study opens doors to future developments and potential advancements in additive manufacturing application in an extensive spectrum of industries.