Analysis of The Effect of Tool Geometry and Machining Parameters on Surface Integrity Properties in Turning of AISI 316L Stainless Steel by Taguchi Method

Abstract

In this study, the Taguchi method has been applied to evaluate the surface integrity features of AISI 316L by using CVD TiAlN/Al2O3/TiCN coated carbide inserts with three different tool geometry under dry milling conditions. Several experiments were conducted using the L18 (2x3x3x3) an experimental design with an orthogonal array on a CNC turning. Analysis of variance (ANOVA) was used to determine the effects of the machining parameters on average surface roughness, circumferential and axial surface residual stresses and degree of work hardening. The depth of cut, cutting tool geometry, cutting speed and feed rate were selected as machining parameters. It was observed that the processing parameters had different effects on the quality properties. The depth of cut was a relatively efficient parameter on surface roughness and had no significant effect on other quality properties. Tool geometry was not affect the average surface roughness. However, it was more effective on the degree of hardening, circumferential and axial surface residual stresses, respectively. It was determined that the cutting speed had a more significant effect on the axial and circumferential surface residual stresses, and the degree of hardening, respectively. While the feedrate had a very high effect on the surface roughness, it was observed that it also had a significant effect on the circumferential and axial surface residual stresses, and the degree of hardening, respectively.

Keywords

• Stainless steel
• cutting inserts
• surface roughness
• surface residual stresses
• work hardening
• Taguchi method

AISI 316L Paslanmaz Çeliğin Tornalanmasında Takım Geometrisi ve İşleme Parametrelerinin Yüzey Bütünlüğü Özelliklerine Etkisinin Taguchi Yöntemi ile Analizi

Öz

Bu çalışmada, kuru frezeleme koşullarında üç farklı takım geometrisine sahip CVD TiAlN/Al2O3/TiCN kaplı karbür uçlar kullanılarak AISI 316L’nin yüzey bütünlük özelliklerini değerlendirmek için Taguchi yöntemi uygulanmıştır. Bir CNC tornada ortogonal dizili bir deneysel tasarım olan L18 (2x3x3x3) kullanılarak çeşitli deneyler yapılmıştır. İşleme parametrelerinin ortalama yüzey pürüzlülüğü, çevresel ve eksenel yüzey kalıntı gerilmeleri ve işleme sertleşmesi derecesi üzerindeki etkilerini belirlemek için varyans analizi (ANOVA) kullanıldı. İşleme parametreleri olarak kesme derinliği, kesici takım geometrisi, kesme hızı ve ilerleme hızı seçilmiştir. İşleme parametrelerinin kalite özellikleri üzerinde farklı etkileri olduğu görülmüştür. Kesme derinliği, yüzey pürüzlülüğü üzerinde nispeten etkili bir parametreydi ve diğer kalite özellikleri üzerinde önemli bir etkisi yoktu. Takım geometrisi ortalama yüzey pürüzlülüğünü etkilemedi. Ancak sırasıyla sertleşme derecesi, çevresel ve eksenel yüzey kalıntı gerilmeleri üzerinde daha etkili olmuştur. Kesme hızının sırasıyla eksenel ve çevresel yüzey kalıntı gerilmeleri ve sertleşme derecesi üzerinde daha önemli bir etkiye sahip olduğu belirlendi. İlerleme hızı, yüzey pürüzlülüğü üzerinde çok yüksek bir etkiye sahipken, sırasıyla çevresel ve eksenel yüzey kalıntı gerilmeleri ve sertleşme derecesi üzerinde de önemli bir etkiye sahip olduğu görülmüştür.

Anahtar Kelimeler

• Paslanmaz çelik
• kesici takımlar
• yüzey pürüzlülüğü
• yüzey kalıntı gerilmeleri
• pekleşme
• Taguchi metodu

Kaynakça

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