CNC Tel Elektro Erozyon Tezgâhında Tel Elektrot Özelliklerinin Yüzey Pürüzlülüğüne Etkisinin Taguchi Yöntemiyle Modellenmesi

Yıl 2018, Cilt: 16 Sayı: 1, 20 - 29, 16.05.2019

Hüseyin Gürbüz , Şehmus Baday , İbrahim Hamarat

Öz

Bu çalışmada, geleneksel
olmayan imalat yöntemlerinden olan CNC tel elektro erozyon tezgâhında tel
elektrot özelliklerinin yüzey pürüzlülüğüne etkisi Taguchi deneysel tasarım
yöntemi ile modellenmiştir. Yüzey pürüzlülüğü deneyleri tel elektrot çapı, tel
malzemesi ve kaplama türü, soğutma yöntemi ve iki farklı tip iş parçası malzemesi
göz önünde bulundurularak gerçekleştirilmiştir. Deneyler sonucunda elde edilen yüzey
pürüzlülüğü değerleri bağımlı değişken olarak seçilirken bağımsız değişken
olarak tel elektrot kaplama türü, tel elektrot çapı, soğutma yöntemi ve iş
parçası malzemesi olarak seçilmiştir. Bağımsız değişkenler her biri için iki
seviye ve dört faktör belirlenerek L16 (2**4) ortogonal deney tasarım yöntemi
seçilmiştir. Belirlenen ortogonal Taguchi tasarım yöntemi ile yüzey pürüzlülüğü
üzerinde kontrol faktörlerini etkisi Sinyal/Gürültü (S/N) oranlarına göre tespit
edilmiştir. Ayrıca kontrol faktörlerinin yüzey pürüzlülüğü üzerindeki etkisi
ANOVA testi yapılarak ortaya konulmuştur. En yüksek yüzey pürüzlülük değerleri
kaplamasız tel elektrotlarla en düşük yüzey pürüzlülük değerleri ise Zn (çinko)
kaplı tel elektrotlarla ortaya çıkmıştır. İş parçası türüne bağlı olarak, AISI
D2 çeliğinin işlenmiş yüzeyinde elde edilen yüzey pürüzlülük değerleri daha
düşük olduğu tespit edilmiştir.

Anahtar Kelimeler

CNC tel elektro erozyon, tel elektrot çapı, tel malzemesi, soğutma yöntemi, Taguchi deney tasarımı, ANOVA testi

Kaynakça

• Dabade, U.A., Karidkar, S.S., Analysis of response variables in WEDM of Inconel 718 using Taguchi technique, Procedia CIRP, 41 (2016), 886-891.
• Klocke, F., Lung, D., Thomaidis, D., Antonoglou, G., Using ultra thin electrodes to produce micro-parts with wire-EDM, Journal of Materials Processing Technology, 149 (2004), 579-584.
• Prasad, N.B.V., ParameswaraRao, Ch.V.S., Sivanaga MalleswaraRao, S., Studies on Wire Selection for Machining with WEDM, International Journal of Computer Science Trends and Technology, 3 (2015) 3, 300-303.
• Straka L., Corny I., Pitel, J., Properties Evaluation of Thin Microhardened Surface Layer of Tool Steel after Wire EDM, Metals, 6 (2016), 95, 1-16.
• Khan, A.A., Ali, M.Bt.M., Shaffiar, N.Bt.M., Relationship of Surface Roughness with Current and Voltage During Wire EDM, Journal of applied sciences, 6 (2006) 10, 2317-2320.
• Sharma, P., Chakradhar, D., Narendranath, S., Effect of wire diameter on surface integrity of wire electrical discharge machined Inconel 706 for gas turbine application, Journal of Manufacturing Processes, 24 (2016), 170-178.
• Kuriakose, S., Shunmugam, M.S., Characteristics of wire-electro discharge machined Ti6Al4V surface, Materials Letters, 58 (2004), 2231-2237.
• Newton, T.R., Melkote, S.N., Watkins, T.R., Trejo, R.M., Reister, L., Investigation of the effect of process parameters on the formation and characteristics of recast layer in wire-EDM of Inconel 718, Materials Science and Engineering A, 513–514 (2009), 208–215.
• Saha, A., Mondal S.C., Multi-objective optimization in WEDM process of nanostructured hardfacing materials through hybrid techniques, Measurement, 94 (2016), 46-59.
• Manjaiah, M., Narendranath, S., Basavarajappa, S., Gaitonde, V.N., Effect of electrode material in wire electro discharge machining characteristics of Ti50Ni50-xCux shape memory alloy, Precision Engineering, 41(2015), 68-77.
• Fard, K.R., Afza R.A., Teimouri, R., Experimental investigation, intelligent modeling and multi-characteristics optimization of dry WEDM process of Al–SiC metal matrix composite, Journal of Manufacturing Processes, 15 (2013), 483-494.
• Sharma, P., Chakradhar, D., Narendranath, S., Evaluation of WEDM performance characteristics of Inconel 706 for turbine disk application, Materials and Design, 88 (2015), 558–566.
• Soundararajan, R., Ramesh, A., Mohanraj, N., Parthasarathi N., An investigation of material removal rate and surface roughness of squeeze casted A413 alloy on WEDM by multi response optimization using RSM, Journal of Alloys and Compounds, 685 (2016), 533-545.
• Aliasa, A., Abdullaha. B., Abbasa, N.M., WEDM: Influence of Machine Feed Rate in Machining Titanium Ti-6Al-4V Using Brass Wire and Constant Current (4a), Procedia Engineering, 41 (2012), 1812-1817.
• Liao, Y. S., Huang, J.T., Su, H.C. (1997), “A study on the machining-parameters optimization of wire electrical discharge machining”, Journal of Materials Processing Technology, Vol. 71, pp 487-493.
• Rozenek, M., Kozak, J., DaÎbrowski, L., èubkowski K., Electrical discharge machining characteristics of metal matrix composites, Journal of Materials Processing Technology, 109 (2001), 367-370.
• Zhang, C., Effect of wire electrical discharge machining (WEDM) parameters on surface integrity of nanocomposite ceramics, Ceramics International, 40 (2014), 9657-9662.
• Pramanick, A., Sarkar, S., Dey, P.P., Das, P.K., Optimization of wire electrical discharge machining parameters for cutting electrically conductive boron carbide, Ceramics International, 42 (2016), 15671-15678.
• Kumar, U.A., Laxminarayana, P., Optimization of Electrode Tool Wear in micro holes machining by Die Sinker EDM using Taguchi Approach, Materials Today:Proceedings, 5 (2018), 1824-1831.
• Selvakumar, G., Sornalatha, G. Sarkar, S. Mıtra, S., Experimental investigation and multi-objective optimization of wire electrical discharge machining (WEDM) of 5083 aluminum alloy, Trans. Nonferrous Met. Soc. of China, 24 (2014), 373-379.
• Sudhakara, D., Prasanthi, G., Application of Taguchi Method for Determining Optimum Surface Roughness in Wire Electric Discharge Machining of P/M Cold Worked Tool Steel (Vanadis-4E), Procedia Engineering, 97 (2014), 565-1576.
• Razak, M.A., Abdul-Rani, A.M., Rao, T.V.V.L.N., Pedapati, S.R., Kamal, S., Electrical Discharge Machining on Biodegradable AZ31 Magnesium Alloy using Taguchi method, Procedia Engineering, 48 (2016), 916-922.
• Ugrasen, G., Ravindra, H.V., Prakash, G.V.N., Prasad, Y.N.T., Optimization of process parameters in wire EDM of HCHCr material using Taguchi’s technique, Materials Today: Proceedings, 2 (2015), 2443-2452.
• Chandramouli, S., Eswaraiah, K., Optimization of EDM Process parameters in Machining of 17-4 PH Steel using Taguchi Method, Materials Today: Proceedings, 4 (2017), 2040-2047.
• Kumar, A., Mishra, H., Vivekananda, K., Maity, K.P., Multi-Objective Optimization of Wire Electrical Discharge Machining Process Parameterson Inconel 718, Materials Today: Proceedings, 4 (2017), 2137-2146.
• Tonday, H.R., Tigga, A.M., Evaluation of the Influence of Wire Electrical Discharge Machining Parameters on Material Removal Rate and Surface Characteristics in Cutting of Inconel 825, Materials Today: Proceedings, 4 (2017), 9865-9869.
• Kolli, M., Adepu, K., Effect of dielectric fluid with surfactant and graphite powder on Electrical Discharge Machining of titanium alloy using Taguchi Method, Engineering Science and Technology, an International Journal, 18 (2015), 524-535.
• Chakraborty, S., Kar, S., Ghosh, S.K., Dey, V., Parametric optimization of electric discharge coating on Aluminium-6351 alloy with green compact silicon carbide and copper tool: A Taguchi coupled utility concept approach, Surfaces and Interfaces, 7 (2017), 47-57.
• Newton T.R., Investigation of the effect of process parameters on the formation of recast layer in wire-EDM of Inconel 718, (Master’s dissertation), Georgia Institute of Technology, Atlanta, Georgia, USA, 2008.