The investigation and design of a focused high pressure cooling technique for the milling of Ti6Al4V
Date
2011-09
Authors
Journal Title
Journal ISSN
Volume Title
Publisher
Stellenbosch : Stellenbosch University, Department of Industrial Engineering
Abstract
Titanium is used in aircrafts structures and engines. The materials’ low thermal
conductivity and chip segmentation during machining cause a fluctuating heat load on the
cutting edge. The extreme reactivity of titanium at elevated temperatures and its
adhesive phenomena gives it the characteristic of being difficult-to- machine. The
reduction of the chip contact length on the cutting tool edge will help to reduce the
friction and thereby slow down tool wear. Various lubrication and cooling strategies were
explored and evaluated in order to develop a new cooling technique that will be able to
reduce the chip contact length. This will help to improve tool life and the surface integrity
of the machined components. The tool wear was measured with an optical microscope in
order to realize the performance of the different strategies. It was found that the high
pressure cooling strategy showed to perform superior to the other strategies. Improved
chip removal and reduced chip contact length with the cutting edge were found. Thereby,
a new focused high pressure cooling cutting tool could be designed. The steps to design a
cutting tool are shown and commented on. It is concluded that the high pressure cooling
techniques show promising results and that future work is necessary to explore these
benefits.
Description
The original publication is available at http://www.isem.org.za/index.php/isem/isem2011.
Conference of the ISEM 2011 Proceedings, Stellenbosch, South Africa, 21 - 23 September 2011.
Conference theme - Innovative Systems Thinking: Unravelling Complexity for Successful Solutions.
Conference of the ISEM 2011 Proceedings, Stellenbosch, South Africa, 21 - 23 September 2011.
Conference theme - Innovative Systems Thinking: Unravelling Complexity for Successful Solutions.
Keywords
Metal temperatures, Titanium heat levels, Titanium, Aircraft structures, Thermal conductivity, Cooling techniques
Citation
Hammond, D. R., Koen, D. & Oosthuizen, G. A. 2011. The investigation and design of a focused high pressure cooling technique for the milling of Ti6Al4V. Presented at the ISEM 2011 Proceedings, September 21-23, Stellenbosch University, Stellenbosch, South Africa.