Investigation of Cutting Forces and Delamination in Drilling of Nomex Honeycomb Core Composite Materials

Ahmet Uyumaz; Fatih Ergençiçeği; Gültekin Basmacı

Makale detayları

Investigation of Cutting Forces and Delamination in Drilling of Nomex Honeycomb Core Composite Materials

Yazarlar:

Ahmet Uyumaz | Fatih Ergençiçeği | Gültekin Basmacı

Yayıncı:

Giresun University

Ana Başlıklar:

Malzeme Mühendisliği (Diğer)

Dergi:

Karadeniz Fen Bilimleri Dergisi Vol.14 Issue 1, pp.50-61

Belge Tipi:

Makale

Yayın Tarihi:

3/2024

Belge Dili:

Türkçe

Document ID (Org No.):

2001313202

pISSN:

2564-7377

Anahtar kelimeler:

Özet:

 The processing of Nomex composite materials is complex due to their anisotropic structure. In such composites, which are joined with fasteners such as rivets and bolts, the quality of the drilling process is an important factor determining the quality of the connection. In this study, the delaminations caused by the cutting forces generated during the drilling process were investigated in order to determine the most suitable cutting tool geometry, spindle speed and feed rate. In the experiments, glass fiber prepreg coated Nomex honeycomb sandwich material; Helical three flute cutting tool and two flute breaker type cutting tools; 100, 200, 300, 400 and 500 mmmin feed rate and 2000, 8000 rpm. and spindle speed parameters of 2000 and 8000 rpm on a vertical machining center using the direct drilling method. Cutting forces were measured with a dynamometer. Delamination was calculated from the images of the drilled holes. At a spindle speed of 2,000 rpm, the highest output delamination factor was determined to be 1.953 and 1.849 with RRFE 040 and RCFE 040, respectively. At 8,000 rpm spindle speed, the highest output delamination factor was found to be 1.915 and 1.830 with RRFE 040 and RCFE 040, respectively. As a result of the experiments, the best cutting force and exit delamination values were obtained at low feed rates with a two-flute breaker type cutting tool. Cutting forces decreased with higher spindle speed. High spindle speed increased the exit delamination values in the experiments with the two-flute breaker type cutting tool.

 The processing of Nomex composite materials is complex due to their anisotropic structure. In such composites, which are joined with fasteners such as rivets and bolts, the quality of the drilling process is an important factor determining the quality of the connection. In this study, the delaminations caused by the cutting forces generated during the drilling process were investigated in order to determine the most suitable cutting tool geometry, spindle speed and feed rate. In the experiments, glass fiber prepreg coated Nomex honeycomb sandwich material; Helical three flute cutting tool and two flute breaker type cutting tools; 100, 200, 300, 400 and 500 mmmin feed rate and 2000, 8000 rpm. and spindle speed parameters of 2000 and 8000 rpm on a vertical machining center using the direct drilling method. Cutting forces were measured with a dynamometer. Delamination was calculated from the images of the drilled holes. At a spindle speed of 2,000 rpm, the highest output delamination factor was determined to be 1.953 and 1.849 with RRFE 040 and RCFE 040, respectively. At 8,000 rpm spindle speed, the highest output delamination factor was found to be 1.915 and 1.830 with RRFE 040 and RCFE 040, respectively. As a result of the experiments, the best cutting force and exit delamination values were obtained at low feed rates with a two-flute breaker type cutting tool. Cutting forces decreased with higher spindle speed. High spindle speed increased the exit delamination values in the experiments with the two-flute breaker type cutting tool.

 The processing of Nomex composite materials is complex due to their anisotropic structure. In such composites, which are joined with fasteners such as rivets and bolts, the quality of the drilling process is an important factor determining the quality of the connection. In this study, the delaminations caused by the cutting forces generated during the drilling process were investigated in order to determine the most suitable cutting tool geometry, spindle speed and feed rate. In the experiments, glass fiber prepreg coated Nomex honeycomb sandwich material; Helical three flute cutting tool and two flute breaker type cutting tools; 100, 200, 300, 400 and 500 mmmin feed rate and 2000, 8000 rpm. and spindle speed parameters of 2000 and 8000 rpm on a vertical machining center using the direct drilling method. Cutting forces were measured with a dynamometer. Delamination was calculated from the images of the drilled holes. At a spindle speed of 2,000 rpm, the highest output delamination factor was determined to be 1.953 and 1.849 with RRFE 040 and RCFE 040, respectively. At 8,000 rpm spindle speed, the highest output delamination factor was found to be 1.915 and 1.830 with RRFE 040 and RCFE 040, respectively. As a result of the experiments, the best cutting force and exit delamination values were obtained at low feed rates with a two-flute breaker type cutting tool. Cutting forces decreased with higher spindle speed. High spindle speed increased the exit delamination values in the experiments with the two-flute breaker type cutting tool.

 Nomex kompozit malzemelerin işlenmesi anizotropik yapıları nedeniyle karmaşıktır. Perçin ve cıvata gibi bağlantı elemanları ile birleştirilen bu tür kompozitlerde delme işleminin kalitesi, bağlantı kalitesini belirleyen önemli bir faktördür. Bu çalışmada delme işlemi sırasında oluşan kesme kuvvetleri ile oluşan delaminasyonlar; en uygun kesici takım geometrisi, fener mili hızı ve ilerleme hızını tespit edebilmek amacıyla incelenmiştir. Deneylerde cam fiber prepreg kaplı Nomex balpeteği sandviç malzeme; helisel üç ağızlı kesici takım ve iki ağızlı kırıcı tip kesici takımlarla; 100, 200, 300, 400 ve 500 mmdak ilerleme hızı ve 2.000, 8.000 devdak fener mili hızı parametreleri kullanılarak dik işleme merkezinde doğrudan delme metoduyla işlenmiştir. Kesme kuvvetleri dinamometre ile ölçülmüştür. Delinen deliklerin alınan görüntüleri üzerinden delaminasyon hesaplaması yapılmıştır. 2.000 devdak iş mili hızında en yüksek çıkış delaminasyon faktörü RRFE 040 ve RCFE 040 ile sırasıyla 1,953 ve 1,849 olduğu belirlenmiştir. 8.000 devdak iş mili hızında ise en yüksek çıkış delaminasyon faktörü RRFE 040 ve RCFE 040 ile sırasıyla 1,915 ve 1,830 olduğu görülmüştür. Deneyler sonucunda en iyi kesme kuvveti ve çıkış delaminasyonu değerleri iki ağızlı kırıcı tip kesici takımla düşük ilerleme hızlarıyla elde edilmiştir. Yüksek fener mili hızı ile kesme kuvvetleri azalmıştır. Yüksek fener mili hızı, iki ağızlı kırıcı tip kesici takımla yapılan deneylerde çıkış delaminasyonu değerleri artmıştır.

Makale detayları

Investigation of Cutting Forces and Delamination in Drilling of Nomex Honeycomb Core Composite Materials

Yazarlar:

Ahmet Uyumaz | Fatih Ergençiçeği | Gültekin Basmacı

Yayıncı:

Giresun University

Ana Başlıklar:

Malzeme Mühendisliği (Diğer)

Dergi:

Karadeniz Fen Bilimleri Dergisi Vol.14 Issue 1, pp.50-61

Belge Tipi:

Makale

Yayın Tarihi:

3/2024

Belge Dili:

Türkçe

Document ID (Org No.):

2001313202

pISSN:

2564-7377

Composite Materials

Nomex

Honeycomb

Delamination

MachinabilityKompozit Malzeme

Nomex

Balpeteği

Delaminasyon

İşlenebilirlik

Sayı

Makale detayları

Yazarlar: Ahmet Uyumaz | Fatih Ergençiçeği | Gültekin Basmacı

Yayıncı: Giresun University

Ana Başlıklar: Malzeme Mühendisliği (Diğer)

Dergi: Karadeniz Fen Bilimleri Dergisi Vol.14 Issue 1, pp.50-61

Belge Tipi: Makale

Yayın Tarihi: 3/2024

Belge Dili: Türkçe

Document ID (Org No.): 2001313202

pISSN: 2564-7377

Sayı

Yazarlar:

Ahmet Uyumaz | Fatih Ergençiçeği | Gültekin Basmacı

Yayıncı:

Giresun University

Ana Başlıklar:

Malzeme Mühendisliği (Diğer)

Dergi:

Karadeniz Fen Bilimleri Dergisi Vol.14 Issue 1, pp.50-61

Belge Tipi:

Makale

Yayın Tarihi:

3/2024

Belge Dili:

Türkçe

Document ID (Org No.):

2001313202

pISSN:

2564-7377