Conventional cutting fluids are known for being expensive, polluting and a non-sustainable part of modern manufacturing processes. Global industrial trends are leaning towards environmental and health friendly technologies. Cryogenic cooling is an innovative and sustainable method, capable of replacing conventional oil-based cutting fluids under various conditions. The method has already proved to have a great potential in many different machining setups, performing equally or better than conventional cooling strategies in all criteria concerning machinability. Majority of research work published about cryogenic machining has revolved around turning operations most commonly in combination with steels, nickel-based alloys and titanium-based alloys. Other machining operations, e.g. milling and drilling, are less researched leaving the field with a great amount of unexplored areas. Although the technology has been developing for more than 60 years the general knowledge on the subject among machining specialists is relatively low. The room for improvements is large and further optimization is necessary before more generalization of the technique within the industry. In the first part of this work a comprehensive state-of-the-art literature study is presented, swath the main objective of milling operations with cryogenic cooling focusing on tool life. the feed force, effective friction coefficient between the chip and the tool surface The second part of document will treat the part of on the transfer line in general and focuses on the last part of pipe that connects the evaporation with the spindle. Modeling the capitating cryogenic flows have been concern of different industries. However, there are no specific commercial software for the cryogenic fluids. Besides, the cryogenic capitating flow necessitates additional modifications on the existing solvers of the common fluids according to the condition that are comprehensively discussed within this study; Slight temperature changes affect and the thermodynamics of the fluid.
I fluidi da taglio convenzionali sono noti per essere costosi, inquinanti e non sostenibili nei moderni processi di produzione. Le tendenze industriali globali si stanno orientando verso tecnologie che rispettose l'ambiente e la salute. Il raffreddamento criogenico è un metodo innovativo e sostenibile, in grado di sostituire i fluidi convenzionali a base di olio e aqua in varie condizioni. Il metodo ha già dimostrato di essere un grande potenziale in molte diverse impostazioni di lavorazione. Maggior parte del lavoro di ricerca pubblicato sui tornitura a base di acciai, leghe a base di nichel e leghe a base di titanio. Altre operazioni di lavorazione, ad es. fresatura sono meno studiate lasciando il campo con una grande quantità di aree inesplorate. Sebbene la tecnologia abbia sviluppato per oltre 60 anni la conoscenza generale in materia Generalizzazione della tecnica nel settore. Nella prima parte di questo lavoro viene presentato uno studio completo di letteratura sulla lavorazione criogenica che rappresenta l'obiettivo principale delle operazioni di fresatura con raffreddamento criogenico. la forza di avanzamento, coefficiente di attrito tra il chip e la superficie dell'utensile La seconda parte del testo sarà sulla linea di trasferimento crioginico riguardo l'isolamento , equipamento vantaggi svantaggi emetodi scelti lultima parte una simulazione CFD per vedere il pressione temperatura e velocità del fluido criogenico(azoto liquido) attraverso una linea di trasferimento a diverse pressioni
Analysis of cryogenic setup for milling application
BOUCHAMI, MOHAMED ALI
2017/2018
Abstract
Conventional cutting fluids are known for being expensive, polluting and a non-sustainable part of modern manufacturing processes. Global industrial trends are leaning towards environmental and health friendly technologies. Cryogenic cooling is an innovative and sustainable method, capable of replacing conventional oil-based cutting fluids under various conditions. The method has already proved to have a great potential in many different machining setups, performing equally or better than conventional cooling strategies in all criteria concerning machinability. Majority of research work published about cryogenic machining has revolved around turning operations most commonly in combination with steels, nickel-based alloys and titanium-based alloys. Other machining operations, e.g. milling and drilling, are less researched leaving the field with a great amount of unexplored areas. Although the technology has been developing for more than 60 years the general knowledge on the subject among machining specialists is relatively low. The room for improvements is large and further optimization is necessary before more generalization of the technique within the industry. In the first part of this work a comprehensive state-of-the-art literature study is presented, swath the main objective of milling operations with cryogenic cooling focusing on tool life. the feed force, effective friction coefficient between the chip and the tool surface The second part of document will treat the part of on the transfer line in general and focuses on the last part of pipe that connects the evaporation with the spindle. Modeling the capitating cryogenic flows have been concern of different industries. However, there are no specific commercial software for the cryogenic fluids. Besides, the cryogenic capitating flow necessitates additional modifications on the existing solvers of the common fluids according to the condition that are comprehensively discussed within this study; Slight temperature changes affect and the thermodynamics of the fluid.| File | Dimensione | Formato | |
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TESI MOHAMED ALI BOUCHAMI.pdf
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Descrizione: ANALYSIS OF CRYOGENIC SETUP FOR MILLING APPLICATION
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5.54 MB
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https://hdl.handle.net/10589/142086