Experimental cooling strategy study on tool efficiency and surface quality in Al ۵۰۸۳ high-speed milling

Cooling in the machining process is one of the most important factors affecting the ability and quality of machining, but economic and environmental problems and its harmful effects on operators have limited its use. In order to minimize the harmful effects and optimize the coolant use, for cooling and lubricating in machining operations, a relatively new technique called the Minimum Quantity Lubrication (MQL) can be used. In MQL, the cooling fluid after mixing with air is sprayed into the machining area in the form of a powder through a nozzle. In this research, different cooling strategies effects in High-Speed Milling (HSM) of aluminum alloy ۵۰۸۳ are investigated on surface quality and tool efficiency. The basic parameters of machining, including cutting speed, feed rate and type of cooling strategy, have been changed in three levels and various tests according to the full factorial table have been performed. The results showed that the MQL method has the least damage to the environment and is economically viable, and also, this method has favorable conditions compared to other methods such as immersion in terms of tool wear and lifespan. Meanwhile, the surface roughness in MQL mode has a condition between dry machining and immersion one, and in some values of feed rate and cutting speed, it can be replaced by the immersion method. But in general, in aluminum alloys machining, if a higher surface quality is needed, it is necessary to use cooling fluid in the traditional ways.

کلیدواژه ها:

HSM ، MQL ، AL ۵۰۸۳ Alloy ، Surface Roughness ، Tool Lifespan