Investigation of Factors Affecting Pt Surface Roughness in Hard Turning of 100CR6 Material

Öz

This study aims to contribute to the applicability of hard turning as an alternative to grinding in the machining of hardened steels. Using a full factorial experimental design, hard turning was performed on samples of 100Cr6 steel with a hardness of 55 HRC, and the factors affecting surface roughness in terms of Pt were investigated. The signal-to-noise ratio (S/N) method was used to determine the optimal factor levels. The effect levels of the factors were identified using analysis of variance (ANOVA). The investigated effect factors are, in order, the cutting edge angle (KAPR), the cutting edge radius (RE), the cutting depth (Ap), and the feed direction. In the external diameter turning process, the optimum levels of the factors are, in the same order, 93°, 0,4 mm, 0,05 mm, and -Z direction (towards the mirror). The effect levels of the factors are, in the same order, 46,39%, 3,17%, 0,97%, and 0.04%. In face turning, the optimal levels of the factors are 100°, 0,8 mm, 0,05 mm, and +X direction (toward the rotation axis), respectively. The effect levels of the factors are 20,99%, 24,16%, 2,81%, and 1,31%, respectively.

Anahtar Kelimeler

• Hard Turning
• Surface Roughness
• Pt
• Face Turning

100CR6 Malzemenin Sert Tornalama İşleminde Pt Cinsinden Yüzey Pürüzlülüğüne Etki Eden Faktörlerin İncelenmesi

Öz

Bu çalışmada sertleştirilmiş çeliklerin talaşlı imalatında taşlama işlemine bir alternatif olarak sert tornalama işleminin uygulanabilirliğine katkı sağlamak amaçlanmıştır. Tam faktöriyel deney dizaynı ile 55 HRC sertlikte 100Cr6 çelikten numuneler üzerinde sert tornalama işlemi yapılarak Pt cinsinden yüzey pürüzlüğüne etki eden faktörler incelenmiştir. Optimum faktör seviyelerinin belirlenmesinde sinyal-gürültü oranı (S/N) yöntemi kullanılmıştır. Faktörlerin etki seviyeleri ise varyans analizi (ANOVA) ile tespit edilmiştir. İncelenen etki faktörleri sırasıyla kater kesme kenar açısı (KAPR), kesici uç köşe radyusu (RE), kesme derinliği (Ap) ve ilerleme yönüdür. Dış çap tornalama işleminde faktörlerinin optimum seviyeleri aynı sıra ile 93°, 0,4 mm, 0,05 mm ve -Z yönü (aynaya doğru)‘dur. Faktörlerin etki düzeyleri aynı sıra ile %46,39, %3,17, %0,97 ve %0,04’tür. Alın tornalama işleminde ise faktörlerin optimum seviyeleri aynı sıra ile 100°, 0,8 mm, 0,05 mm ve +X yönüdür (dönme eksenine doğru). Faktörlerin etki düzeyleri aynı sıra ile %20,99, %24,16, %2,81 ve %1,31’dir.

Anahtar Kelimeler

• Sert Tornalama
• Yüzey Pürüzlülüğü
• Pt
• Alın Tornalama

Kaynakça

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