Person: ATAKÖK, GÜRCAN
Loading...
Email Address
Birth Date
Research Projects
Organizational Units
Job Title
Last Name
ATAKÖK
First Name
GÜRCAN
Name
7 results
Search Results
Now showing 1 - 7 of 7
Publication Open Access Management of the engineering data for manufacturing(2021-09-01) ATAKÖK, GÜRCAN; Atakok G., Cun M.Most companies have adopted the use of computer integrated engineering software to cope with the increasing competition and pressure to produce better quality and at a faster rate, enhancing their systems on this basis. Models are designed on computers, designs are validated in the software, and tool paths for manufacturing are generated in different specific software. All engineering information is generated and stored in computers. This development enhances faster rate of works in companies; however, some problems such as the management of the data arise. All departments in a business work separately, but for the same purpose. It is required for each department to have access to related information. The existence of a system in which the information is checked and managed depending on their creation time, versions, and the department is of importance. In this article, a system that allows not only the mechanical design department, but also the manufacturing, storage, process planning, quality control, electrical design, purchasing departments, etc. to have access to the required information has been developed. In the absence of this kind of system, loss of time, scraps and loss of engineering time would be investigated. After starting up the system, its benefits are defined. Tracing the workflows for management purposes would be handled by the system. A 'Validation of Design' process is modelled for the company. The information can be accessible to only those responsible for the data, and not anyone else. This allows users to work in a better environment, hence, increases productivity.Publication Open Access Tensile, three-point bending and impact strength of 3D printed parts using PLA and recycled PLA filaments: A statistical investigation(2022-05-01) ATAKÖK, GÜRCAN; Atakok G., Kam M., Koc H. B.In this study, the Taguchi methodology was used to investigate the effects of Fused Deposition Modeling (FDM) production parameters tensile strength, three-point bending strength, and impact strength of three-dimensional (3D) printed polylactic acid (PLA) and recycled polylactic acid (Re-PLA) test parts. As FDM process parameters, filaments (PLA, RePLA), three different layer thicknesses (0.15-0.20-0.25 mm), occupancy rates (30%, 50% and 70%), and filling structure (Rectilinear) were determined in the experimental design. The FDM technique was used to print the test parts. The tensile, three-point bending, and impact strength of the test parts were determined using the ISO 527, ISO 180, and ISO 178 test standards, respectively. The results showed that layer thickness is the most efficient factor for improving tensile strength, three point bending strength, and impact strength rather than occupancy rate or filament materials. The optimum results were obtained in layer thickness (0.25 mm), occupancy rate (70%), and filament material (PLA), respectively. They were calculated to be as 60.006 MPa at tensile strength, 125.423 MPa at three-point bending strength, 16.961 kJ/m2 at izod impact strength. Also, Scanning Electron Microscopy (SEM) has been utilized to investigate the morphology and topography alterations in the fractured surface of test parts. The study demonstrates the possibility of 3DP with RePLA filament and environmental awareness was noted by using recycled filament. The study demonstrates the possibility of 3DP with Re-PLA filament and environmental awareness was noted by using recycled filament. The research shows that 3D printing with Re-PLA is feasible. (c) 2022 The Authors. Published by Elsevier B.V.Publication Open Access Data Analysis for Predictive Maintenance of Servo Motors(HINDAWI LTD, 2020-09-11) ATAKÖK, GÜRCAN; Girit, Oguz; Atakok, Gurcan; Ersoy, SezginVibration and temperature data of a servo motor are analyzed with PLC which is widely used in the industry. With this system, power supply can be detected on the servo motors. In this way, undesirable situations such as disruptions in production and productivity loss can be prevented from occurring. It is an important problem for businesses to detect malfunctions that may occur in servo motor dysfunction. Previously, methods such as ultrasonic sound measurements, thermal cameras, endoscopy equipment, and energy analysis have been used and discussed in the literature. Our study offers a PLC-based vibration and temperature measurement system designed as a solution of this problem. In this system, vibration and temperature measurements were made while the servo motor was kept running. These measurements were measured with or without load, considering the operating ranges of the servo motor, and the compatibility of the data was evaluated.Publication Open Access Investigation of time-based pressure control for microfluidics chip design(2023-03-01) TOPTAŞ, ERSİN; ERSOY, SEZGİN; ATAKÖK, GÜRCAN; Ersoy S., Atakök G., Khorsandi D., Toptaş E.The emergence of the microfluidic chip was a game-changer in microbiological analysis platforms. This technology, by combining physics, chemistry, biology, and computing, helps researchers to obtain precise results in a shorter time. However, it requires more advancements in order to lessen its limitations. This study presents the design, modelling, and microbiological analysis of a microelectromechanical system (MEMS) based microfluidic chip. Three different microfluidic chips have been developed during the design process. These chips have different inlet channels and one outlet channel. The modelling process was carried out with Multiphysics Software. Pressure and velocity data in micron-sized channels were checked for each system. The flow directions of the fluids in the inlet and outlet channels were observed according to the pressure change. As a result of the analysis, the highest velocity was found in the microfluidic chip with three inlet channels. In comparison, the highest pressure was measured in the microfluidic chip with four inlet channels. These values are 2.36 x10-17 m/s and 13.5 Pa, respectively. The pressure values of the 4 and 5-channel microfluidic chips were very close. The results showed that as the number of inlet channels increased, the pressure value in the microfluidic chip increased, but the velocity value decreased.Publication Open Access CNC kumaş kesim makinesindeki krank-biyel mekanizmasının kinematik analizi ve kesici bağlantı uzunluklarının performansa etkisi(2022-01-01) ATAKÖK, GÜRCAN; Atakök G., Balci S.Krank - biyel mekanizmaları, kullanım alanı çok geniş olan bir hareket mekanizmasıdır ve basit, kullanışlı olması dolayısıyla çok katlı materyalleri kesme makinelerinde oldukça tercih edilmektedir. Bu mekanizmaya dayanan kesme sistemlerinde, kesme hızını arttıran parametrelerden biri olan krank uzunluğu değişiminin sisteme olan etkilerini görmek için Matlab / Simulink ile simülasyon gerçekleştirilmiştir. Ayrıca çok katlı serilmiş materyalleri kesmek için kullanılan kesme makinesinin kesici mekanizmasının kinematiği incelenmiş, hareketi analiz edilmiştir. Krank-biyel uzuvlarının optimum boyutları, karmaşık sayıların kullanılarak çıkarıldığı denklemlere göre belirlenmiştir. Çıkarılan boyutlar ve hareket denklemleri, Matlab / Simulink ile modellenerek karakteristik eğriler elde edilmiştir. Yapılan analizler sonucunda, çok katlı serilmiş materyalleri kesme makinesi için uygun krank - biyel kol uzunluğu bulunmuştur.Publication Open Access Cooling and Multiphase Analysis of Heated Environmentally Friendly R152A (C2H4F2) Fluid Coming from the Production Process According to Nist Indicators(2024-05-01) ATAKÖK, GÜRCAN; ERSOY, SEZGİN; Kartal M. A., ATAKÖK G., ERSOY S.Cooling processes are responsible for a significant portion (20%) of global energy consumption and raise environmental concerns such as ozone depletion, the greenhouse effect, and high energy use. This study investigates the potential of R152a, a refrigerant with low global warming potential (GWP), as a more sustainable alternative. The performance, safety, and operational efficiency of R152a were evaluated under various conditions. Although R152a offers high performance and low GWP, its flammability necessitates caution, especially in certain mixtures. A 12-pass tube-type heat exchanger model was simulated using computational fluid dynamics (CFD) to analyze the fluid behavior within the exchanger. The pressure, density, dynamic pressure, Prandtl number, total pressure, and temperature distributions for both R152a and H2O (water) were visualized using contour plots. The simulations comprehensively examined the fluid behavior inside and outside the heat exchanger. The results revealed the influence of the temperature on the internal dynamic pressure and density of R152a. Compared with R134a, R152a demonstrated superior performance but a lower coefficient of performance (COP) than R32. Studies also suggest that R152a exhibits lower irreversibility in Organic Rankine Cycle (ORC) systems than R245fa. These findings suggest that R152a holds promise for future refrigeration systems, as supported by existing research on its performance and compatibility. One study focused on optimizing the heat exchanger performance by maximizing the heat capacity and minimizing the pressure drop. This study employed a parallel-flow heat exchanger with R152a as the coolant for the hot process water. The temperature changes, pressure drops, and resulting energy efficiency and thermal performance of both fluids were analyzed. The results highlight the distinct energy efficiencies and thermal performance of the employed fluids.Publication Open Access Preference Based on Reasons of Vocational and Technical Secondary Schools in Turkey(ELSEVIER SCIENCE BV, 2014-08) ATAKÖK, GÜRCAN; Atakok, Gurcan; Kam, Menderes; Kurt, Mustafa; Laborda, JGIt is considered that choosing a career is one of the most important decisions in human life. Because of many reasons such as family, environment, school etc. Industry and technical occupation high school to be preferred by students' educational system is very important to adoption of developments in the world, catch up with information society and develop its international competitiveness. The education system must train qualified manpower in order to decrease unemployment and increase social welfare. Policy of educational system is important at this stage. Industry technical occupation high schools educate qualified manpower and various non-formal education institutions continuously give the employers the skills needed by sector. A survey was done among the 503 students of 10th classes in industry and technical high school in Uskudar, Istanbul, Turkey. The data was collected with survey method. It is understood that the students of educated in industry technical high school choose their school according to their own wishes abilities and gender. They also think they couldn't get enough points for university entrance exam. In addition industry technical occupation high schools give them a chance to find a job easily. It is the shortest way for job opportunities and they bring off in their life. (C) 2014 The Authors. Published by Elsevier Ltd.