Eventos Anais de eventos
COBEM 2017
24th ABCM International Congress of Mechanical Engineering
Hard turning of induction hardened SAE 1045 steel with PCBN tools under dry machining and Minimum Quantity of Lubrication (MQL)
Submission Author:
Marco Aurelio Sampaio , PR
Co-Authors:
fred lacerda amorim, Ricardo Torres, Álisson Rocha Machado, Marco Aurelio Sampaio
Presenter: Marco Aurelio Sampaio
doi://10.26678/ABCM.COBEM2017.COB17-5910
Abstract
MQL is an efficient practice in machining of soft materials. According to relevant literature its application during machining of hard materials has not yet been completely explored in scientific research. This work evaluates flank and crater wear of PCBN tools, chip morphology and workpiece surface integrity (surface roughness and white layer) in hard turning of induction hardened SAE1045 steel at dry machining and MQL. Experiments were conducted using two ranges of cutting speed and depth of cut at a constant feed rate. Results demonstrated that the tool wear modes were: average flank wear (VBB), crater wear and notches on the tool corner and at the end of the depth of cut. The last one has important influence on roughness. Also there is a running in period, where a reduction in the roughness with an increase in the average flank wear was observed. The use of MQL, despite reducing the average flank wear (VBB), increased the notch wear and consequently increased the surface roughness. The notch wear does not depend on the depth of the cut. In regards to crater wear, the MQL reduced its occurrence.
Keywords
Minimum Quantity of Lubrication, Hard turning, Induction Hardening, PCBN, tool wear
