The Effect of Friction Coefficient on Cutting Forces, Temperature and Cutting Tool Stresses in Machining Process

Öz

In this study, it is aimed to improve the cutting performance of the cutting tools used in the turning process, which is of great importance in the industry. Experiments with different cutting parameters were carried out on AISI 1050 steel with carbide cutting tools and cutting forces were measured with the help of a dynamometer. Simulations were made with Deform-3D by taking the cutting parameters as reference. The experimental results and the cutting forces obtained from the simulations carried out with different friction coefficients (0.3-0.4-0.5-0.6-0.7) were compared. In addition, the effects of friction coefficient on temperature and cutting tool stresses were investigated. It has been seen that the simulation and experimental cutting force results for friction coefficients of 0.4 and 0.5 are close to each other. As a result of the analyses, it has been observed that friction has a great effect on cutting tool stresses and temperature. Depending on the temperature and stresses, the wear and damage points that may occur in the cutting tool have been determined. The results obtained from the study will make significant contributions to the improvement of cutting tool cutting performance and the selection of optimal cutting parameters.

Anahtar Kelimeler

• Cutting forces
• cutting tool stresses
• friction coefficient
• finite elements
• tool-chip interface

Talaş Kaldırma İşleminde Sürtünme Katsayısının Kesme Kuvvetleri, Sıcaklık ve Kesici Takım Gerilmeleri Üzerine Etkisi

Öz

Bu çalışmada, endüstride büyük önem taşıyan tornalama işleminde kullanılan kesici takımların kesme performansının iyileştirilmesi amaçlanmıştır. Karbür kesici takımlarla AISI 1050 çeliği üzerinde farklı kesme parametreleriyle deneyler yapılmış ve dinamometre yardımıyla kesme kuvvetleri ölçülmüştür. Kesme parametreleri referans alınarak Deform-3D ile simülasyonlar yapılmıştır. Farklı sürtünme katsayılarıyla (0.3-0.4-0.5-0.6-0.7) yapılan simülasyonlardan elde edilen kesme kuvvetleri ile deneysel sonuçlar karşılaştırılmıştır. Ayrıca sürtünme katsayısının sıcaklık ve kesici takım gerilmeleri üzerindeki etkileri incelenmiştir. 0.4 ve 0.5 sürtünme katsayıları için simülasyon ve deneysel kesme kuvveti sonuçlarının birbirine yakın olduğu görülmüştür. Analizler sonucunda sürtünmenin kesici takım gerilmeleri ve sıcaklık üzerinde çok etkili olduğu gözlenmiştir. Sıcaklığa ve gerilmelere bağlı olarak kesici takımda oluşabilecek aşınma ve hasar noktaları belirlenmiştir. Çalışmadan elde edilen sonuçlar, kesici takım kesme performansının iyileştirilmesine ve optimum kesme parametrelerinin seçiminde önemli katkılar sağlayacaktır.

Anahtar Kelimeler

• Kesme kuvvetleri
• kesici takım gerilmeleri
• sürtünme katsayısı
• sonlu elemanlar
• takım-talaş ara yüzeyi

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