Investigation of Temperature and Forces on Drilling GGG40 Materials with Carbide Drills on CNC Turning Machine Tools

Öz

In this study, drilling experiments were carried out on the CNC turning machine tools. In the experiments, GGG40 material was drilled TiAlN coated and uncoated carbide drills that was Ø14 mm and had internal cooling channels. The drilling force (Fz) and moment (Mz) that were measured with a dynamometer. Moreover, the temperature was measured using a thermocouple of Ø1 mm K type. The thermocouple was positioned at the drill bit by passing through the internal cooling channels of the carbide drill. Drilling experiments were performed by using 3 different cutting speeds and 3 different feed rates. Experimental results show that increasing of the feed rate goes up drilling force and moment. But, increasing of the cutting speed goes down drilling force and moment. For all that, the temperature decreases with increasing of the feed rate, and temperature steps up due to increasing of the cutting speed.

Anahtar Kelimeler

• Drills,Cutting forces,Drilling,Temperature measurement,Force measurement

GGG40 Malzemesinin CNC Torna Tezgahında Karbür Matkaplarla Delinmesinde Sıcaklık ve Delme Kuvvetlerin Araştırılması

Öz

Bu çalışmada CNC torna tezgahında delik delme deneyleri yapılmıştır. Deneylerde GGG40 malzemesi, Ø14 mm TiAlN kaplamalı ve kaplamasız içten soğutmalı karbür matkaplar ile delinmiştir. Deneyler sırasında oluşan, delik delme kuvveti (Fz) ve moment (Mz) bir dinamometre ile sıcaklık ise Ø1 mm K tipi ısıl çift kullanılarak ölçülmüştür. Isıl çifti, karbür matkabın iç soğutma kanallarından geçirilerek kesici ucuna konumlandırılmıştır. Delik delme deneyleri, 3 farklı kesme hızı ve 3 farklı ilerleme kullanılarak yapılmıştır. Elde edilen deney sonuçları, ilerleme artıkça delme kuvveti ve momentin arttığı, kesme hızı arttıkça da delme kuvveti ve momentin azaldığını göstermiştir. Bununla birlikte, sıcaklığın artan ilerleme ile azaldığı, artan kesme hızına bağlı olarak artış gösterdiğini ortaya koymuştur. 

Anahtar Kelimeler

• Matkaplar,Kesme kuvvetleri,Delik delme,Sıcaklık ölçme,Kuvvet ölçme

Kaynakça

1. Bhowmick, S., Lukitsch, M.J., Alpas, A.T. (2010). Dry and minimum quantity lubrication drilling of cast magnesium alloy (AM60). International Journal of Machine Tools & Manufacture 50: 444-457.
2. Brandao, L.C., Coelho, R.T., Lauro, C.H. (2011). Contribution to dynamic characteristics of the cutting temperature in the drilling process considering one dimension heat flow. Applied Thermal Engineering 31: 3806-3813.
3. Heinemann, R., Hinduja, S., Barrow, G., Petuelli, G. (2006). Effect of MQL on the tool life of small twist drills in deep-hole drilling. International Journal of Machine Tools & Manufacture 46: 1-6.
4. Imran, M., Mativenga, P.T., Gholinia, A., Withers, P.J. (2014). Comparison of tool wear mechanisms and surface integrity for dry and wet micro-drilling of nickel-base superalloys. International Journal of Machine Tools & Manufacture 76: 49-60.
5. Le Coz, G., Marinescu, M., Devillez, A., Dudzinski, D., Velnom, L. (2012). Measuring temperature of rotating cutting tools: Application to MQL drilling and dry milling of aerospace alloys. Applied Thermal Engineering 36: 434-441.
6. Prasanna, J., Karunamoorthy, L., Raman, M.V., Prashanth, S., Chordia, D.R. (2014). Optimization of process parameters of small hole dry drilling in Ti–6Al–4V using Taguchi and grey relational analysis. Measurement 48: 346-354.
7. Rahim, E.A., Kamdani, K., Sharif, S. (2008). Performance evaluation of uncoated carbide tool in high speed drilling of Ti6Al4V. Journal of Advanced Mechanical Design, Systems, and Manufacturing 2(4): 522-531.
8. Rahim, E.A., Sasahara, H. (2011). A study of the effect of palm oil as MQL lubricant on high speed drilling of titanium alloys. Tribology International 44: 309-317.

9. Rajmohan, T., Palanikumar, K. (2013). Application of the central composite design in optimization of machining parameters in drilling hybrid metal matrix composites. Measurement 46: 1470-1481.
10. Rawat, S., Attia, H. (2009). Characterization of the dry high speed drilling process of woven composites using Machinability Maps approach. CIRP Annals - Manufacturing Technology 58: 105-108.
11. Tasdelen, B., Wikblom, T., Ekered, S. (2008). Studies on minimum quantity lubrication (MQL) and air cooling at drilling. Journal of Materials Processing Technology 200: 339-346.
12. Kayır, Y., Usta, M. (2012). Torna tezgahlarında matkaplarla delik delme işlemlerinde kesme kuvvetleri ve sıcaklığın ölçülmesi. 1. Uluslararası Demir Çelik Sempozyumu, Nisan 3-4, 2012, Karabük, Türkiye, Bildiri Kitabı, 1284-1295p.