Abstrack:
The use of cutting fluid is to reduce the friction, transport of chips, cleaning of tools and thus the generation of heat and dissipate the generated heat. Application of cutting fluid also improves the quality of the workpiece by continually removing metal fines and cuttings from the tool and cutting zone. To date, large amounts of inefficient cutting fluid which cause both environmental damage and health hazards have had to be used. Due to this problem, some alternative has been sought to minimize or avoid the use of cutting fluid in machining operations. Some of these alternatives are machining with Minimum Quantity Lubrication (MQL), air jet cooling and dry machining. After MQL method has been carried out by many of researcher, air jet cooling is being trialled as possible solution to metal cutting operations. From economics of view, used air jet cooling is more efficient than MQL. The main goal of this work is to investigate the use of air jet cooling on surface roughness and tool wear on machining operation. Effect and mechanism in air jet cooling are investigated by used of a turning process. AISI 1010 was used as the workpiece material. Surface roughness was measured for twelve different air jet pressure, changing from 0.5 bar until 6 bar at two different air jet positions. Initial results the use of air jet cooling with proper selection of position and pressure, it is possible to reduced tool wear and increased surface roughness.
Full Text: