saujs Sakarya University Journal of Science 2147-835X Sakarya University 10.16984/saufenbilder.292019 Mechanical Engineering Makine Mühendisliği Effect of drill geometry on hole quality and cutting performance Matkap geometrisinin delik kalitesi ve kesme performansına etkisi Yavuz Mehtap ÇANKIRI KARATEKİN ÜNİVERSİTESİ Gökçe Harun TUBITAK-SAGE Yavaş Çağlar Karcan Kesici Takım Sanayi Ve Ticaret Limited Şirketi Korkut İhsan GAZI UNIV Şeker Ulvi GAZI UNIV 10 01 2017 21 5 1051 1066 02 13 2017 08 14 2017 Copyright © 1997, Sakarya University Journal of Science 1997 Sakarya University Journal of Science

In this study, the effects of different drill geometriesand cutting parameters on drilling performance have been systematicallyinvestigated. Using four types of drills with different geometries, thrust,torque, surface roughness and geometric tolerance deviations are measured.Experimental studies have tested the performance of commercially availabletwo-tool geometry and developed original two-channel geometry. The drillingoperation was performed on GGG 50 material using a 10 mm diameter, two-spindle,helical, solid cementitious carbide drills. For experiment design, a TaguchiTest Design was created with three different control factors of four levels,geometric form of drill, cutting speed and feed. The taguchi S/N analysis andthe graphs in which the obtained data were processed were used in theevaluation of the test results. With the help of the Anova analysis, importanceand influence rate on the test results of experimental parameters found.Experimental results were evaluated and optimum geometry and optimum cuttingconditions were determined. According to the results evaluated by "thesmallest best" approach in Taguchi signal-noise analysis; The originally tool4 has superiority to other geometries in terms of thrust force, Input-outputsurface roughness, deviation from circularity, deviation from perpendicularity,The cutting parameters with the lowest feed rate (0,15 mm/rev.) and the highestcutting speed (110-120 m/min.) were determined as the optimum levels of controlfactors.

Bu çalışmada, farklımatkap geometrileri ve kesme parametrelerinin delme performansı üzerineetkileri sistematik bir şekilde incelenmiştir. Farklı geometrilere sahip dörttip matkap kullanılarak itme kuvveti, moment, yüzey pürüzlülüğü ve geometriktoleranstan sapma değerleri ölçülmüştür. Deneysel çalışmalarda ticari olaraktemin edilebilen yaygın iki takım geometrisi ile özgün iki kanal geometrisinin performanslarıtest edilmiştir. Delme operasyonu, 10 mm çapında, iki ağızlı, helisel, yekparesementit karbür matkaplar kullanılarak GGG 50 malzemesi üzerindegerçekleştirilmiştir. Deney deseni için matkabın geometrik formu, kesme hızı veilerleme miktarı olmak üzere dörder seviyeli üç farklı kontrol faktörü ile birTaguchi Deney Tasarımı oluşturulmuştur. Deney sonuçlarının değerlendirilmesindeTaguchi S/N analizi ve elde edilen verilerin işlendiği grafiklerkullanılmıştır. Anova analizi yardımıyla da deney parametrelerinin deneysonuçları üzerindeki önemi ve etki oranları bulunmuştur. Deneysel sonuçlardeğerlendirilerek optimum geometri ve optimum işleme şartları belirlenmiştir.Taguchi Sinyal-Gürültü analizinde “en küçük en iyidir” yaklaşımıyladeğerlendirilen sonuçlara göre; ilerleme kuvveti, giriş-çıkış yüzeypürüzlülüğü, dairesellikten sapma ve diklikten sapma açısından özgün olarakgeliştirilen 4 numaralı takım geometrisi diğer geometrilere üstünlük sağlarken,ilerlemenin en düşük olduğu (0,15 mm/dev.) ve kesme hızının en yüksek olduğu(110-120 m/dak.) kesme parametreleri ise kontrol faktörlerinin optimumseviyeleri olarak belirlenmiştir.

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