Air-Cooling Used For Metal Cutting

Abstract

Air-cooling and dry machining are both being trialled as possible solutions to the metal cutting industry's long running problems of extending tool life, reducing tool failure and minimising the heat generation at the tool tip. To date, large amounts of expensive coolant which cause both environmental damage and health hazards have had to be used. The introduction of dry machining is the goal of today's metal cutting industry that tirelessly endeavours to reduce machining costs and impact from chemicals in the environment. Modern tool tips are already capable of maintaining their cutting edge at higher temperatures, but even with these improvements in tool materials, the cutting edge will eventually break down. Applying cold air to the tool interface of these modern tool tips will also help prolong their tool life reducing the cost of metal cutting. Dry machining incorporating air being directed on to the tool interface is considered in this paper as a possible alternative for harmful liquid-based cooling. However, low convective heat removal rates associated with conventional aircooling methods are generally inadequate for dissipating intense heat generation in the cutting processes and suitable improved cooling methodologies have yet to be established.

Cryogenic Air Cooling Technique for Machining of Super Alloys

“…Cryogenic cooling approaches are introduced in the field of machining to overcome some of the issues by Boswell et al, [3]. Stanford M et al [4] have investigated the use of gaseous and liquid nitrogen as a cutting fluid, results indicate that a 55% reduction in flank wear is achievable when turning BS 970-080A15 (En32b).…”

“…According to Brian Boswell [8], [3], the introduction of Ranque-Hilsch Vortex tube to provide cold air to the tool interface has shown to significantly improve the performance of machining, a highly significant reduction in tool tip temperature, thereby reduced flank wear and increased tool life is achieved. It is possible to obtain temperatures as low as -46°C and as high as +127°C when using the Ranque-Hilsch vortex tube.…”

Vorteks Soğutma Yöntemi̇ni̇n Talaşli İmalat Yöntemleri̇ Ve Kesme Parametreleri̇ne Göre İncelenmesi̇

“…Modern takım uçları, kesici kenarlarını daha yüksek sıcaklıklarda koruyabilirmektedir, ancak takım malzemelerindeki bu iyileştirmelerle bile, çeşitli imalat operasyonlarında kesici takımlar aşınmaya devam etmektedir. Bu modern uçların takım ara yüzüne soğuk hava uygulanmasının, kesme maliyetini düşürerek takım ömrünü uzatmaya yardımcı olacağı düşünülmektedir [9] Bu kapsamda pek çok araştırmacı Vorteks yönteminin avantajlarını ortaya koymak için çalışmalar yapmaktadır.…”

Experimental Evaluation of the Energy Performance of an Air Vortex Tube when the Inlet Parameters are Varied

“…According to Boswell [37], the power required to compress air from atmospheric conditions, assuming an isentropic process, can be calculated according to expression (4), where the subscripts "2" and "1" indicate the compressor output and input conditions.…”