Person: BAKIR, BARKIN
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BAKIR
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BARKIN
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Publication Metadata only Influence of molding conditions on the shrinkage and roundness of injection molded parts(SPRINGER LONDON LTD, 2010) BAKIR, BARKIN; Kurt, Mustafa; Kaynak, Yusuf; Kamber, Omer S.; Mutlu, Bilcen; Bakir, Barkin; Koklu, UgurDuring the plastic injection molding process, one of the biggest challenges is shrinkage which deteriorates the quality of produced parts. To control and reduce this defect, the essential way is to perfectly determine the variables like molding parameters. In this study, the effects of molding parameters including packing pressure, melt temperature, and cooling time on shrinkage and roundness have been investigated experimentally. Also, the relationship among initial molding parameters, the cavity pressure, and mold temperature was investigated. The results of this experimental study and analysis fulfill various requirements of plastic injection molding and clarify the relationship between molding conditions and the overall quality of produced parts. This study illustrated that packing pressure and melt temperature are dominant factors which determine the quality of parts.Publication Metadata only El rehabilitasyonu için geliştirilen robotik harici el iskelet sisteminin sağlıklı bireyler üzerinde test edilmesi(2021-04-17) ACAR, GÖNÜL; BAL, ABDULLAH; BAŞPINAR, ULVİ; BAKIR, BARKIN; Yıldız E., Kısacık M., BAL A., BAKIR B., BAŞPINAR U., Bayrak F., ACAR G.Publication Metadata only A Methodology for Cutting Force Prediction in Side Milling(TAYLOR & FRANCIS INC, 2014) BAKIR, BARKIN; Aydin, Mehmet; Ucar, Mehmet; Cengiz, Abdulkadir; Kurt, Mustafa; Bakir, BarkinThis article describes a methodology based on force distributions for predicting cutting forces in side milling 7075-T651 aluminum. The methodology includes a practical mechanism for gathering experimental data. Milling forces on each disc are measured by experimentally dividing the cutter into discs for determining the milling coefficients. Force distributions are characterized as functions of cutting and edge forces, including cutter geometry and cutting parameter effects. In contrast to previous researches, the coefficients are determined considering relations between load and shear. Owing to its high performance, this methodology can be effectively used to improve machining accuracy in side milling.Publication Open Access Sustainable machining of the magnesium alloy materials in the CNC lathe machine and optimization of the cutting conditions(KAUNAS UNIV TECHNOL, 2014-06-25) BAKIR, BARKIN; Eker, Beni; Ekici, Bulent; Kurt, Mustafa; Bakur, BarkinIn this study, MQL turning performance was compared to dry conditions. The magnesium based material will be formed by applying the orthogonal cutting. The CNC Lathe shall be used for both cutting processes. The experiment used MINITAB 16 software to establish the experiment plan. In this study, workpiece was turned at cutting speeds of 230, 330 and 430 m/min, feed rates of 0.20, 0.35 and 0.50 mm/rev and cutting depth of 1, 2 and 3 mm. Taguchi experimental design method was used for determining the settings of turning parameters. Orthogonal arrays of Taguchi, the signal-to-noise (S/N) ratio, the analysis of variance (ANOVA) were carried out to determine the optimum levels and to analyze the influence of cutting speed, feed rate, cutting depth on surface roughness, temperature and cutting forces during dry and MQL turning.Publication Metadata only Analysis of the forces and vibrations effecting on cutting tool in the micro drilling of ti-6al-4v material produced by ebm method(2022-11-28) BAKIR, BARKIN; ATAKÖK, GÜRCAN; ŞEN, MURAT; ACER S., BAKIR B., ATAKÖK G., ŞEN M.