دراسة تأثير ظروف نفث مختلفة على الخواص الترايبولوجيه في عمليات التشغيل

Study the Effect of Different Jet Conditions on Tribological Properties in the Machining Process

Abstract

This study aims to investigate the effect of lubricant jet speed and angle on tool wear , surface roughness and cutting temperature in the lathe machine by used low carbon steel .The lathe machine played a significant role in the metalworking process, which involves cutting. The operating parameters for the turning process are very important for achieving high performance, which is measured by workability, good surface finishing, lower tool wear, and higher material removal rates. It is necessary to experiment with optimization cutting speeds and feed rates while maintaining a consistent depth of cut. Low-carbon steel. The experimental work contains three different conditions during metal cutting operations, including dry cutting, flood oil cutting, and oil jet lubricant, utilizing (ARO). This study provides information for optimizing oil injection parameters and improving lubrication by examining the characteristics of wear and surface roughness as well as the effects of oil jet lubrication, angle, and speed on lubrication performance. Oil jet lubrication was used throughout the turning process, with two different injection angles (15˚and 40˚) included in the lubrication conditions. Various lubrication pressures, including (6 and 12) bar, were tested to examine how they affected surface roughness, tool wear, cutting temperature, chip expendability at different feed rates, and tribological characteristics over time.
The results showed a significant decrease in roughness, especially for samples that were cutting with oil jet lubricant as the best results in roughness and the best outcomes for cut zone temperature were for samples cut with nozzle jet of angle 15˚ and pressure 6 bar. Through the dry cut, it was demonstrated that the surface roughness reaches (4.853 µm) at (0.03 mm/rev) and cutting speed (28 m/min) in comparison to other conditions, and in flood operation, it reaches (2.53 µm) but uses a significant amount of oil. The problems caused by vibrations and temperature variations were accompanied by an increase in energy usage when the pressure was raised to 12 bars. The experimental analysis found that lowering pressure and using a small nozzle was the best way to improve tribological properties.