SUNConferences, Southern African Institute of Industrial Engineering 2013

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The Effects Of Cooling And Cutting Tool Coating On Tool Wear During Milling Of TI6AL4V And 40CRMNMO7
Derek Rhys Hammond, Dimitar Dimitrov, Nico Treurnicht

Last modified: 2013-06-24

Abstract


In response to climate change issues there are major developments towards light weight structures affecting aircraft and motor industries, including production technologies. This has increased industrial relevance of machining difficult-to-cut materials. There is a general trend for reduction of machining time and cost in the manufacturing industry. Significantly higher cutting parameters and process temperature are consequences from this. In the pursuit for improved performance, new alternative methods of effectively machining these materials are investigated. An important criterion during processing of these materials is their machinability.

This paper discusses high performance machining of Ti6Al4V and 40CrMnMo7. The properties that make the use of these materials advantageous make them difficult-to-cut. Ti6Al4V has a low thermal conductivity causing the accumulation of heat in the cutting zone. 40CrMnMo7 has a high stiffness resulting in greater mechanical loading of the cutting edge. This has encouraged studies into cooling strategies and techniques to improve tool life and reduce cost. The paper covers further the performance of a coating (TiAlN) and various coating treatments under selected cooling conditions. In this way a clear orientation is given for possible improvement and optimisation in milling operations, as well point of departure for further studies.

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