COBEM99

S19 Usinagem dos Materiais

Title:

DRILLING PERFORMANCE OF ALUMINUM-SILICON ALLOY USING MINIMUM MIST LUBRICATION TECHNIQUE

Summary :

ABSTRACT. THE HIGH PERCENTAGE OF COSTS (17%) OF USING A CUTTING FLUID IN THE OPERATIONAL PRODUCTION COSTS, THE ECOLOGICAL SUBJECTS, THE LAW DEMANDS RELATED TO THE PRESERVATION OF THE ENVIRONMENT AND THE HUMAN HEALTH JUSTIFY THE RECENT RESEARCHES ABOUT THE RESTRICTION TO THE USE OF ABUNDANT CUTTING FLUID IN MACHINING PROCESSES. HOWEVER, IT IS IMPORTANT TO POINT OUT THAT THE USE OF A MINIMAL MIST LUBRICATION (MIXED AIR-OIL) HAS BEEN POSSIBLE IN PRODUCTION PROCESSES FOR MACHINING, DUE TO THE TECHNOLOGICAL DEVELOPMENT OF TOOL MATERIALS AND ALSO MACHINE-TOOLS. THE OBJECTIVE OF THIS WORK IS TO TEST THE MINIMUM OIL VOLUME TECHNIQUE (10 ML/H) MIXED IN A FLOW OF AIR IN COMPARISON WITH THE OVERHEAD FLOOD IN THE DRILLING PROCESS OF ALUMINUM SILICON ALLOY (SAE 323) WITH A SOLID CARBIDE DRILL (K10). THE RESULTS SHOWED THAT THE OPERATION USING MINIMAL MIST LUBRICATION PRESENTED PERFORMANCE IN TERMS OF QUALITY OF THE HOLES (DIMENSIONAL TOLERANCE, CIRCULARITY, AND ROUGHNESS) AND TOOL WEAR AS GOOD AS THE OPERATION WITH OVERHEAD FLOOD. MOREOVER IN TERMS OF CUTTING FORCES (CUTTING POWER) THE OPERATION WITH MINIMUM OIL VOLUME PRESENTED A BETTER PERFORMANCE. KEY WORDS: DRILLING, MACHINING; ALUMINUM-SILICON; MINIMAL LUBRICATION.

Author :

Braga, Durval Uchôas
Coppini, Nivaldo Lemos
Diniz, Anselmo Eduardo
Miranda, Gilberto Arenas

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