Eventos Anais de eventos
COBEM 2017
24th ABCM International Congress of Mechanical Engineering
Evaluation of Surface Roughness in Low Frequency Vibration Turning of ABNT-1020 Carbon Steel
Submission Author:
Cláudio Parreira Lopes , MG
Co-Authors:
Adriano Nogueira Drumond Lopes, Jean Pereira , Wagner Custódio de Oliveira, Cláudio Parreira Lopes
Presenter: Wagner Custódio de Oliveira
doi://10.26678/ABCM.COBEM2017.COB17-2804
Abstract
The surface roughness is an important design parameter in the machining process control. This state of surface is associated to the manufacturing process and working conditions of the machines, tools and tribological systems, such as the friction and wear level present in the components. In the machining of ductile materials, the roughness values are influenced by the formation of the built up edge, by the microscopic adhesion of the ferrite and by the subsurface fracture phenomenon. Low Frequency Vibration (LFV) turning is an alternative used to improve the chip forming mechanism and, consequently, to guarantee better surface integrity of the machined parts. This work proposes the study of a mathematical model capable of determining the theoretical value of roughness Ra in the LFV turning of ABNT 1020 carbon steel, in order to be used as a process free response variables. This study proposes the elaboration of a mathematical model capable of determining the theoretical value of roughness Ra in the LFV machining of ABNT-1020 carbon steel, in order to be used as a parameter of process response. As indicative of the tendency behavior of the machined profile, Rz roughness values were also evaluated, which presented variations similar to Ra roughness. By statistical analysis, it was observed that the LFV machining presented higher values of roughness if compared to the conventional machining. However, the suggested mathematical model allowed approximation with the experimental roughness measurements, according to the position of the roughness gauge in the section of cut-off and the angular position of the measurement in relation to the specimens diameter.
Keywords
low frequency vibration, Roughness, surface condition, Turning, ductile material
