Investigation of the Effects of Approaching Angle and Cutting Parameters on Machinability of AISI 5140 Steel during Turning

Abstract

Determining the best processing conditions of a material to be formed by turning which is intrinsically complex structure, gains importance in terms of cost, time and efficiency. In this study, the effect of cutting parameters and approach angle on various machinability characteristics during the turning of medium carbon alloy steel AISI 5140 material in dry cutting conditions were investigated experimentally. Using the dynamometer, accelerometer and surface roughness device, the main cutting force (Fc), vibration (Vb) and workpiece surface roughness (Ra) measurements were carried out. According to the Taguchi design, 27 experiments were performed while the Fc and Vb were measured on-line during the experiments, Ra measurement was performed. The effects of approaching angle and cutting parameters were examined graphically; the best machining conditions of the workpiece were evaluated by considering different machinability criteria. In this study, the machinability of AISI 5140 steel is investigated comprehensively which is utilized in various areas mainly on automotive industry however had limited study in the past. According to findings, feed rate is the effective parameter on Fc ve Ra while depth of cut and feed rate is seen as efficient on Vb. It is seen that approaching angle is effective all on quality characteristics especially on main cutting force.

Keywords

• AISI 5140
• vibration
• surface roughness
• cutting force

Project Number

2014-ÖYP-080

AISI 5140 Çeliğinin Tornalanması Esnasında Yaklaşma Açısı ve Kesme Parametrelerinin İşlenebilirliğe Etkisinin İncelenmesi

Abstract

Doğası gereği karmaşık bir yapıya sahip olan tornalama ile şekillendirilecek bir malzemenin en iyi işleme şartlarının belirlenmesi maliyet, zaman ve verimlilik açısından önem kazanmaktadır. Bu çalışmada orta karbonlu alaşım çeliği AISI 5140 malzemenin kuru kesme şartlarında tornalanması esnasında kesme parametrelerinin ve yaklaşma açısının çeşitli işlenebilirlik kıstasları üzerine etkisi deneysel olarak incelenmiştir. Dinamometre, akselerometre ve yüzey pürüzlülük cihazı kullanılarak esas kesme kuvveti (Fc), titreşim (Vb) ve deney malzemesi yüzey pürüzlülüğü (Ra) ölçümleri yapılmıştır. Taguchi tasarımına göre 27 adet deney yapılmış, deneylerde Fc ve Vb anlık olarak ölçülürken, işleme durdurulduğunda Ra ölçümü gerçekleştirilmiştir. Yaklaşma açısı ve kesme parametrelerinin etkisi grafiksel olarak incelenmiş, deney malzemesinin en iyi işlenme şartları farklı işlenebilirlik kıstasları göz önüne alınarak değerlendirilmiştir. Bu çalışmada, başta otomotiv sektörü olmak üzere çeşitli alanlarda yaygın kullanıma sahip olan ancak geçmişte sınırlı sayıda çalışmanın konusu olan AISI 5140 çeliğinin işlenebilirliği kapsamlı olarak incelenmiştir. Elde edilen bulgulara göre, Fc, Vb ve Ra üzerinde ilerleme oranının etkili parametre olduğu görülmüştür. Yaklaşma açısının Fc başta olmak üzere tüm kalite karakteristikleri üzerinde etkili olduğu görülmüştür.

Keywords

• AISI 5140
• titreşim
• yüzey pürüzlülüğü
• kesme kuvveti

Supporting Institution

Selçuk Üniversitesi Öğretim Üyesi Yetiştirme Programı Koordinatörlüğü Birimi

Project Number

2014-ÖYP-080

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