Chip Morphology in Turning of AZ91D Magnesium Alloy under Different Machining Conditions

Abstract

In recent years, there has been an increase in research into industrial applications, especially in the machining of lightweight metals. In this study, the effect of processing of AZ91D magnesium alloy in different parameters (machining medium, cutting speed, depth of cut, feed rate and cutting tool types) on the force, chip formation and cutting tool conditions were investigated. The experiments were designed using the L₁₈ orthogonal array of the Taguchi method. Thanks to the Taguchi method, time and cost savings were achieved by reducing the number of tests required. Then, the effect of the turning parameters on the force values was obtained by analysis of variance. The most important parameters affecting the force values were the depth of cut and the feed rate. As a result, only the cutting speed has a significant effect on the chip type.

Keywords

• Chip formation,AZ91D,Magnesium alloy,Turning

Farklı İşleme Koşullarında AZ91D Magnezyum Alaşımının Tornalanmasında Talaş Morfolojisi

Abstract

Son yıllarda, özellikle hafif metallerin işlenmesinde ve bu metallerin endüstride uygulamalarına yönelik araştırmalarda önemli ölçüde artış olmuştur. Bu çalışmada, AZ91D magnezyum alaşımı farklı parametrelerde (işleme ortamı, kesme hızı, kesme derinliği, ilerleme oranı ve kesici takım tiplerine) işlenmesi sonrasında kuvvet, talaş tipleri ve kesici takım durumları incelenmiştir. Deneyler, Taguchi metodunun L₁₈ ortogonal dizini kullanılarak tasarlanmıştır. Taguchi metodu sayesinde yapılması gereken deney sayısı azaltılarak zaman ve maliyet tasarrufu sağlanmıştır. Ardından varyans analizi yapılarak tornalama parametrelerinin kuvvet değerlerine olan etkisi elde edilmiştir. Varyans analizi sonuçlarından kuvvet değerlerini etkileyen en önemli parametrelerin kesme derinliği ve ilerleme oranı olduğu belirlenmiştir. Sonuç olarak, yalnızca kesme hızının talaş tipinde önemli bir etkisinin olduğu görülmüştür.

Keywords

• AZ91D,Talaş oluşumu,Magnezyum alaşımı,Tornalama işlemi

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