Eventos Anais de eventos
COBEM 2023
27th International Congress of Mechanical Engineering
INVESTIGATION OF THE TOOL-CHIP INTERFACE TEMPERATURE IN CRYOGENIC TURNING OF HARDENED AISI D6 TOOL STEEL
Submission Author:
Anderson Clayton Alves de Melo , RN
Co-Authors:
EDMILSON DANTAS DE LIMA JUNIOR, Anderson Clayton Alves de Melo, Adilson Oliveira, Julio Milan, Álisson Rocha Machado
Presenter: Anderson Clayton Alves de Melo
doi://10.26678/ABCM.COBEM2023.COB2023-0145
Abstract
Hard turning is considered a strong candidate to partially replace grinding in finishing operations. However, it produces high temperatures that contributes to accelerate the cutting tool wear. To minimize this effect, mineral-based cutting fluids can be applied, although there are many drawbacks associated with the use of these cutting fluids as they are hazardous to the environment. In this context, the need for more eco-friendly cutting fluids is growing and liquid nitrogen (LN2) offers a promising alternative. Previous studies have shown that LN2 can significantly reduce the cutting tool wear in comparison with other cooling strategies, and this is normally attributed to a reduction in the tool-chip interface temperature. However, investigations on the tool-chip interface temperature in cryogenic machining are scarce in the literature, particularly with regard to the turning of tool steels. Thus, in this study, the tool-chip interface temperature during the turning of quenched and tempered AISI D6 tool steel, under dry and using LN2, was investigated. A tool-workpiece thermocouple system was developed for this purpose and calibrated using a data acquisition system based on the Arduino Uno platform. In the turning tests, liquid nitrogen was delivered at the tool flank face of PCBN inserts at three cutting speeds with a constant feed rate and depth of cut. The results showed that LN2 was able to reduce the tool-chip interface temperature at the lowest cutting speed; however, when this cutting parameter was increased, the reduction in the interface temperature was minimal as compared with the dry condition.
Keywords
Hard turning, Tool-chip interface temperature, Hardened AISI D6 tool steel, Cryogenic machining, Tool-workpiece thermocouple method
