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Öğe Investigation of turning in different cutting parameters of Al 6061 with finite elements method(Fırat Üniversitesi, 2017-10) Çelik, Yahya Hışman; Özek, Cebeli; Türkan, CihatIn this study, the effects of cutting parameters on cutting force, temperature and stress were investigated in the turning of 6061 aluminum alloy by using DEFORM-3D package program based on finite element method. Constant depth of cut (1 mm), three different cutting speeds (40, 60 and 80 m/min), and three different feed rates (0.05, 0.1 and 0.15 mm/rev) were used in research simulations. From the made analyses, the lowest cutting force was obtained as 150 N at 80 m/min cutting speed and 0.05 mm/rev feed rate, the highest cutting force was obtained as 368 N at 40 m/min cutting speed and 0.15 mm/rev feed rate. While the lowest temperature was obtained as 230 °C at 40 m/min cutting speed and 0.05 mm/rev feed rate, the highest temperature was obtained as 354 °C at 80 m/min cutting speed and 0.05 mm/rev feed rate. In addition, the lowest stress was 997 MPa at 80 m/min cutting speed and 0.05 mm/rev feed rate, the maximum stress was 1090 MPa at 40 m/min cutting speed and 0.15 mm/rev feed rate. It has been observed that the cutting force and the stress value show a similar tendency depending on the cutting parametersÖğe CNC plazma ile kesmede işleme parametrelerinin kesme kalitesine etkisinin araştırılması(Fırat Üniversitesi, 2011) Çelik, Yahya Hışman; Özek, CebeliNowadays, It is important to usenew machines in manufacturing technologies.Oneof the most important of these machinesisCNC plasma cutting machines. The measuring sensitivity is not soimportantinthese machines.However,the materials workingunder high pressure and strength can be cut by means of these machines. In thisstudy,S235JR sheet materials of 4, 6 and 8mm thickness which areused inpressurized containers were cut in the CNC plasma machine atvarious speeds, amperesand arc voltages. For Cutting processeswhichwerecarried out atvarious parameters,surface roughnessesand temperature distributionsweremeasured on the samplescut.Comments on the hardness and material strength of the material exposed to the cutting process were madedepending on surface roughnessesand temperature distributions.Öğe Plastik enjeksiyon kalıplarında kalıplama parametrelerinin bulanık mantık ile modellenmesi(Fırat Üniversitesi, 2011) Çelik, Yahya Hışman; Özek, CebeliIn this study, the elementof the internal threaded ½”-¾” plasticT elbow hasbeen molded at differentinjection pressures, mold temperaturesand molten plastic temperatures in aninjection machine. The amount of volumetric shrinkage, injection and cooling time obtained for this element which was molded at different parameters were investigated experimentally. The data obtained from experimental studyweredescribed to the Fuzzy LogicModel. According to the results which Fuzzy Logicproduced, itwas determined that with the increase of injection pressureand molten plastic temperature, injection time decreased, on the other hand, the amount of volumetric shrinkage and cooling time increased.With the increase ofmold temperature, it was determined that the amount of volumetric shrinkage decreased, but injection and cooling time increased.Öğe Küresel kapların derin çekilmesinde kalıp/baskı plakası geometrisi ve kuvvetinin et kalınlığı üzerindeki etkisinin araştırılması(Batman Üniversitesi, 2018) Çelik, Yahya Hışman; Özek, CebeliÖğe Kompozit matris malzemelerinin mekanik özelliklerinin grafen takviyesi ile iyileştirilmesi(Batman Üniversitesi, 2018) Çelik, Yahya Hışman; Topkaya, Tolga; Özek, Cebeli; Bağatır, Tuğba
