Browsing by Author "Gök K."

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    Effects of cutting parameters and tool-path strategies on tool acceleration in ball-end milling
    (Institute of Metals Technology, 2017) Gök A.; Gök K.; Bilgin M.B.; Alkan M.A.
    The determination of the cutting-parameter values that cause increases in vibration values is important to minimize the errors that can occur. Thus, the first aim of this study was to investigate the optimum cutting-parameter values and tool-path strategies in ball-end milling of the EN X40CrMoV5-1 tool steel with three coated cutters using the Taguchi method. The parameters taken into consideration are the cutting speed, feed rate, step over and tool-path strategies. The second aim of the study, a model for the tool acceleration as a function of the cutting parameters, was obtained using the response-surface methodology (RSM). As a result, the most effective parameter within the selected cutting parameters and cutting strategies for both inclined surfaces and different coatings was the step over. In terms of tool coatings, the most deteriorating coating for the tool acceleration on both inclined surfaces was the TiC coating. In addition, the response-surface methodology is employed to predict the tool-vibration values depending on the cutting parameters and tool-path strategy. The model generated gives highly accurate results.
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    Evaluation of Screwing Configurations in Conventional Plating of Femoral Shaft Fractures Using Finite Element Analysis
    (World Scientific, 2021) Öztepe B.; Gök K.; Erdoǧan Y.; Inal S.; Gok A.
    Several fractures that occur in the human body depend on trauma or as a result of hormonal and bone fatigue. Fracture types that take place out of the neck area of the femoral bone are named femoral shaft fractures. Femoral shaft fractures are frequent conditions in orthopedics. Conventional plating method is a method that necessitates the fixation of the contact surface by contacting the epiphyses used in the treatment of such fractures. This method is known to be efficent in speeding up the healing process by reducing the movement between the epiphyses. In this study, femur models which are plated in various forms with fractures were analyzed with computer-aided finite element software and stresses on bone surfaces and fracture surfaces were determined. It is aimed to determine the best result by examining the relationship between the inputs such as the number of screws used during plating, the fixation area and material selection and the outputs obtained by finding the stresses on the bone surface and stresses on the broken surfaces. © 2021 World Scientific Publishing Company.
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    COMPARISON OF THE SUCCESS OF META-HEURISTIC ALGORITHMS IN TOOL PATH PLANNING OF COMPUTER NUMERICAL CONTROL MACHINE
    (World Scientific, 2022) Çaşka S.; Gök K.; Gök A.
    Carrying out an engineering process with the least cost and within the shortest time is the basic purpose in many fields of industry. In Computer Numerical Control (CNC) machining, performing a process by following a certain order reduces cost and time of the process. In the literature, there are research works involving varying methods that aim to minimize the length of the CNC machine tool path. In this study, the trajectory that the CNC machine tool follows while drilling holes on a plate was discussed within the Travelling Salesman Problem (TSP). Genetic Algorithms (GA), Particle Swarm Optimization (PSO), and Grey Wolf Optimizer (GWO) methods were used to solve TSP. The case that the shortest tool path was obtained was determined by changing population size parameter in GA, PSO, and GWO methods. The results were presented in tables. © 2022 World Scientific Publishing Company.
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    INVESTIGATION USING FINITE ELEMENT ANALYSIS OF EFFECT TO EARRING OF ANISOTROPY PARAMETERS IN DEEP DRAWING PROCESS
    (ModTech Publishing House, 2023) Gök K.; Taş H.; Gök A.; Alkan M.A.
    The investigation mentioned focuses on utilizing finite element analysis to study the impact of anisotropy parameters on the behavior of earrings during the deep drawing process. deep drawing is a manufacturing technique used to transform flat sheet metal into three-dimensional shapes, and anisotropy refers to the directional dependence of material properties. by analyzing and understanding how anisotropy parameters affect the behavior of earrings during the deep drawing process, this investigation aims to provide valuable insights for optimizing the manufacturing process and enhancing the quality and durability of earrings. In this study, an Al6061-T6 sheet material with different planar anisotropies with a single thickness of 2 mm was employed to simulate the effects of anisotropy parameters on the earring by using finite element method. The effects of anisotropy parameters on the earring were examined by using FEM. Variations force obtained in Δr2 are higher than Δr1 . This is due to the anisotropy of the material. It can be said that the FEM simulations give reasonable results in view of earring for deep drawing processes. So, experimental costs can therefore be avoided using a suitable FEM model. © International Journal of Modern Manufacturing Technologies.