Estudio del efecto de los líquidos iónicos (BMIMBF4) y (BMIMPF6) como aditivos en el aceite vegetal para el sistema de mínima cantidad de lubricante (MQL) en la vida útil de las herramientas de corte de metal duro y acabado superficial en el proceso de torneado del acero inoxidable AISI 304 y acero AISI/SAE 4140

Abstract

The experimentation was carried out using a conventional semi-automatic lathe and focused mainly on the surface finish of the machined specimens and the life mainly focused on the surface finish of the machined specimens and the life of the cutting tool. cutting tool life. In the experimentation, tungsten carbide inserts with a tip radius of 0.8 mm and denomination, CNMG 120408 MF 2025, according to the SANDVIK COROMANT catalog were used as cutting tool, where the variation of the cutting speed, given by the insert manufacturer, was counted as a parameter and the recommended and maximum values were selected. The homogeneous mixture used in the MQL lubrication system had as components the vegetable oil "Coolube 2210 EP" and the ionic liquids (BMIM)(BF4) and (BMIM)(PF6), it was established to use 1 percent by weight of ionic liquids per quantity of base oil, having a flow directed to the working area between the cutting tool and the surface of the specimen, therefore, a comparison of turning using the aforementioned lubrication system and dry machining was made. dry machining. For the evaluation of the surface finish, the roughness Ra and Rz were measured on the surface of the machined specimen using an "SJ-210" roughness meter. According to ANSI/ASME B94.55M standard and with the help of a scanning electron microscope, the service life of the machined specimen was evaluated. the service life of the cutting tool was evaluated by observing and measuring the evolution of the wear of the flank of the of the insert flank wear as a function of machining time.