Al 7075 Alaşımının İşlenmesinde Optimum Kesici Takım Geometrisinin Belirlenmesi: İstatiksel Bir Yaklaşım

Öz

Bu çalışmada, havacılık ve otomotiv endüstrilerinde yüksek mukavemet/ağırlık oranı nedeniyle sıklıkla tercih edilen Al 7075 alaşımının frezelenmesinde takım geometrisi ve kesme parametrelerinin kesme kuvvetleri üzerindeki etkileri incelenmiştir. Deneyler için farklı boşluk (8°, 10°, 12°) ve talaş açısı (14°, 18°, 22°) kombinasyonlarına sahip 3 ağızlı karbür parmak frezeler özel olarak üretilmiştir. Taguchi L9 dizisine göre tasarlanan süreçte, kesme hızı (70, 85, 100 m/dk) da kontrol faktörü olarak kullanılmıştır. ANOVA sonuçları, kesme kuvvetini en çok %40 katkı oranıyla kesme hızının etkilediğini, ancak verilerin istatistiksel anlamlılık eşiğinin üzerinde kalıp birer eğilim göstergesi olduğunu belirtmiştir. Sinyal/Gürültü analizine göre optimum parametreler; 8° boşluk açısı, 18° talaş açısı ve 100 m/dk kesme hızı olarak belirlenmiştir. Ölçülen en düşük bileşke kesme kuvveti 469,72 N'dur. Sonuç olarak, düşük boşluk açısı ve yüksek kesme hızının birleşiminin kesme direncini düşürerek işleme verimliliğini artırdığı görülmüştür.

Anahtar Kelimeler

• Al 7075
• Parmak Frezeleme
• Taguchi
• Kesme Kuvveti
• Takım Geometrisi
• Optimizasyon

Destekleyen Kurum

Sakarya Uygulamalı Bilimler Üniversitesi Bilimsel Araştırma Projeleri (BAP) Komisyon Başkanlığına (Proje No: 130-2023)

Etik Beyan

Bu çalışma için, etik izin belgesine ihtiyaç yoktur.

Teşekkür

Bu çalışmanın maddi açıdan desteklenmesine olanak sağlayan, Sakarya Uygulamalı Bilimler Üniversitesi Bilimsel Araştırma Projeleri (BAP) Komisyon Başkanlığına (Proje No: 130-2023) teşekkür ederiz.

Determining the Optimum Cutting Tool Geometry for Machining Al 7075 Alloy: A Statistical Approach

Öz

This study investigates the effects of tool geometry and cutting parameters on cutting forces in milling Al 7075 alloy, which is frequently preferred in the aerospace and automotive industries due to its high strength-to-weight ratio. Three-flute carbide end mills were specially manufactured with varying combinations of clearance angle (8°, 10°, 12°) and rake angle (14°, 18°, 22°). The experimental process used a Taguchi L9 orthogonal array with clearance angle, rake angle, and cutting speed (70, 85, 100 m/min) as control factors. Variance analysis (ANOVA) showed that cutting speed had the largest contribution ratio (40%) to cutting forces, with results serving as exploratory trend indicators. Signal-to-Noise (S/N) analysis identified 8° clearance angle, 18° rake angle, and 100 m/min cutting speed as the optimum combination for minimum cutting force. The lowest resultant cutting force measured was 469.72 N. The findings indicate that combining a small rake angle with a high cutting speed reduces cutting resistance and improves machining efficiency.

Anahtar Kelimeler

• Al 7075
• End Milling
• Taguchi
• Cutting Force
• Tool Geometry
• Optimization

Destekleyen Kurum

Chair of the Scientific Research Projects (BAP) Commission at Sakarya University of Applied Sciences (Project No: 130-2023)

Etik Beyan

No ethical approval is required for this study.

Teşekkür

We would like to express our gratitude to the Sakarya University of Applied Sciences Scientific Research Projects Coordination Unit (BAPK) for supporting project number 202-2024 in the execution of this study.

Kaynakça

1. Altintas, Y., "Manufacturing automation: metal cutting mechanics, machine tool vibrations, and CNC design", New York: Cambridge University Press; 2012 p.2012.
2. Güvercin, S., Yıldız, A., "Optimization of cutting parameters using the response surface method", Sigma Journal of Engineering and Natural Sciences, 36 (1), Pages 113–21, 2018.
3. Seçgin, Ö., "Multi-objective Optimization of Ms58 Brass Machining Operation by Multi-axis CNC Lathe", Arabian Journal for Science and Engineering, 46 (3), Pages 2133–45, 2021. 10.1007/s13369-020-04984-8
4. Zailani, Z.A., Rosli, M.H., Shuaib, N.A., Zainuddin, M.Z., Azawqari, A.A., "Optimisation of Cutting Performance in Drilling of Aluminium Alloy 7075 Involving Chilled Air Cooling under Taguchi Method", Journal of Advanced Research in Applied Mechanics, 133 (1), Pages 12–23, 2025.
5. Cagan, S.C., Venkatesh, B., Buldum, B.B., "Investigation of surface roughness and chip morphology of aluminum alloy in dry and minimum quantity lubrication machining", Materials Today: Proceedings, 27 , Pages 1122–6, 2020. 10.1016/j.matpr.2020.01.547
6. Zaino, A., Yazid, M., "Environmentally friendly approaches assisted machining of aluminum alloy 7075-T6 for automotive applications: A review", International Journal of Integrated Engineering, 11 (6), Pages 018–26, 2019.
7. Habrat, W., Lisowicz, J., Tymczyszyn, J., Skroban, A., "Simulation and Experimental Study of the Termo-Mechanical Effect of the Milling Process of 7075 Aluminium Alloy", 18 (3), Pages 58–66, 2024.
8. Saraf, G., Imam, S., Nirala, C.K., "Machinability analysis of additively manufactured Ti6Al4V using micro-pillar textured tool under various cutting fluid strategies", Wear, 556–557 (July), Pages 205514, 2024. 10.1016/j.wear.2024.205514

9. Durakbaşa, M.N., Akdogan, A., Vanli, A.S., Günay, A., "Surface Roughness Modeling with Edge Radius and End Milling Parameters on Al 7075 Alloy Using Taguchi and Regression Methods", Acta Imeko, 3 (4), Pages 46, 2014.
10. Savković, B., Kovač, P., Stoić, A., Dudić, B., "Optimization of machining parameters using the taguchi and anova analysis in the face milling of aluminum alloys al7075", Tehnicki Vjesnik, 27 (4), Pages 1221–8, 2020.
11. Singh, K.K., Joshi, M., Anurag, B., Pant, R., "Effect of rake angles and material properties on chip formation: A Review", International Journal of Engineering Science and Innovative Technology (IJESIT), 3 (6), Pages 526–30, 2014.
12. Kalpakjian, S., Schmid, S., "Manufacturing Engineering & Technology", New Jersey: Pearson Publishing Company; 2014.
13. Dechjarern, S., "3D finite element investigations of the influence of tool rake angle on cutting performance", Australian Journal of Mechanical Engineering, 7 (1), Pages 53–9, 2009.
14. Chen, Y., Wang, J., Chen, M., "Enhancing the machining performance by cutting tool surface modifications: a focused review", Machining Science and Technology, 23 (3), Pages 477– 509, 2019.
15. Knápek, T., Dvořáčková, Š., Váňa, M., "The Effect of Clearance Angle on Tool Life, Cutting Forces, Surface Roughness, and Delamination during Carbon-Fiber-Reinforced Plastic Milling", Materials, 16 (14)2023.
16. Nouari, M., Haddag, B., Moufki, A., Atlati, S., "Investigation on the built-up edge process when dry machining aeronautical aluminum alloys", In: Machining of Light Alloys p. 35–48, 2018.
17. Sakthivelu, S., Anandaraj, T., Selwin, M., "Multi-objective optimization of machining conditions on surface roughness and MRR during CNC end milling of Aluminium Alloy 7075 using Taguchi design of experiments", Mechanics and Mechanical Engineering, 21 (1), Pages 95–103, 2017.
18. Lin, Y.C., Wu, K. Da, Shih, W.C., Hung, J.P., "Evaluation of the Optimum Machining Stability of a Milling Tool with Different Flutes and Overhangs", Advances in Science and Technology Research Journal, 13 (2), Pages 56–64, 2019.
19. Mydin, N.M.M., Dahnel, A.N., A. Raof, N., Muhamad Khairussaleh, N., Mokhtar, S., "Comparison of Tool Wear Mechanisms During Drilling of Aluminium Alloy 7075 in Dry and Chilled Air Conditions", Journal of Science and Technology, 14 (1), Pages 67–74, 2022.
20. Algül, Ş., G., Kuş, H.., Katmer, Ş., Şeker, U., "Investigation of the Effect of Cutting-Edge Rounding on Surface Quality in Milling of Al 7075 and Al 6082 Alloys", Orclever Proceedings of Research and Development, 5 (1), Pages 470–484, 2024.
21. Aslantas, K., Hascelik, A., Çiçek, A., "Performance evaluation of DLC and NCD coatings in micro-milling of Al7075-T6 alloy", Journal of Manufacturing Processes, 81 (July), Pages 976–90, 2022. 10.1016/j.jmapro.2022.07.053
22. Çakir, F.H., Yilmaz, A., Sert, Z., "Evaluation of the performance of DLC Coatings (ta-C) of WC-Co tools while machining Al7075 alloy", Proceedings of the Institution of Mechanical Engineers, Part C: Journal of Mechanical Engineering Science, 238 (16), Pages 8151–63, 2024.
23. Liu, J., Xiong, J., Zhou, L., Guo, Z., Wen, H., You, Q., et al., "Properties of TiN–Al2O3–TiCN–TiN, TiAlN, and DLC‐coated Ti(C,N)‐based cermets and their wear behaviors during dry cutting of 7075 aluminum alloys", International Journal of Applied Ceramic Technology, 18 (3)2020.
24. Çerlek, Ö., Han, K., Akin, Y., Seçgin, Ö., "Experimental Investigation of Parameters Affecting the Tensile Strength of Silicone-Filled 3D Printed ABS Products", Journal of Materials Engineering and Performance, 34 (11), Pages 9627–9636, 2025.
25. Koyunbakan, M., Mumcu, H., Taşdemir, V., Kaya, Z., "Investigation of the effects of experimental parameters on the processing of AA5754-H22 alloy by SPIF method", International Journal of Material Forming, 18 (3), Pages 1–11, 2025.
26. Özek, C., Taşdemir, V., "Modelling Of Surface Roughness With Variance Analysis In Turning Of Aisi 304 Austenitic Stainless Steel", Technological Applied Sciences, 4 (3), Pages 305–14, 2009.
27. Seçgin, Ö., Boru, B., Özsert, İ., "Development Of 3 Axis Force Measurement Systems for Machine Tools", Journal of the Chinese Society of Mechanical Engineers, 44 (3), Pages 295–300, 2023.
28. Schulz, H., Moriwaki, T., "High-speed Machining", Vol. 41. 1992 p.1992.