Eventos Anais de eventos
COBEM 2021
26th International Congress of Mechanical Engineering
INFLUENCE OF CUTTING CONDITIONS ON MACHINING FORCES AND TOOL WEAR IN MILLING AISI304 STAINLESS STEEL
Submission Author:
Rafael Hamano , RJ
Co-Authors:
Rafael Hamano, Hector Costa, Tatiane de Campos Chuvas
Presenter: Rafael Hamano
doi://10.26678/ABCM.COBEM2021.COB2021-2076
Abstract
Machining is one of the most popular manufacturing processes in the world. Despite this popularity, it is a complex task because of the difficulties in determining optimal cutting conditions capable of producing parts within shape, size and finish specifications at the lowest possible cost. Thus, the study of tool wear is of great relevance to the industry as it influences on operating costs. Tool wear is directly related to the machining parameters, such as cutting speed, feed and depth of cut, and other variables such as workpiece material. Therefore, optimizing these parameters enables a reduction in the machining cost by providing better performance of tool life. One way to predict tool life is by quantifying machining forces. This work aims to analyze different cutting parameters (cutting speed and feed per tooth rate) and the influence of lubrication upon tool wear and, consequently, machining forces on a top milling of a 304 austenitic stainless steel. Assessments of the rake face was performed by optical microscope (OM) to evaluate tool wear. The results showed that the higher the feed per tooth, the greater the magnitudes of the machining forces and that the tool wear were directly related to the machining forces values. In terms of lubrication, dry machining resulted in lower tool wear rates, compared to Minimum Quantity Lubrication (MQL). Machining with MQL aims to reduce machining forces and improve the surface integrity of machined parts. However, in the case of top milling, MQL resulted in increased tool wear, and led to deterioration of surface integrity.
Keywords
milling, tool wear, stainless steels, Roughness, AISI 304
