Optimization constrained of the lifetime of the CBN 7020 during the machining of steel 100 Cr6

Abstract

The purpose of the study is to evaluate the performances of material of cut CBN 7020 produced during turning bearing steel 100 Cr6 soaked. The method adopted for the realization of these tests is that of the experimental designs. A mathematicals models validated by the criterion of Fisher, allowed to predict the lifetime T of the tested tool material, also the waited roughness Ra (surface integrity). They are necessary for optimization and the industrial exploitation. The experimental results has a better output in terms of lifetime (T = 68.64 min), and surfaces roughness (Ra = 0.38 to 1.04 μm) to Vc = 120 m/min (cutting speed) taken at the same moment as the comparable wear has for those the grinding (Ra = 0.2 to 1.1 μm). Non linear optimization of the life time material (CBN 7020) constrained inequality (surface roughness Ra) by the means of Matlab allowed to release an optimum (T = 68.33 min) to Vcop = 120 m/min near to the experimental value with 99%. © Springer Science + Business Media B.V. 2009.