Journal
INTERNATIONAL JOURNAL OF REFRACTORY METALS & HARD MATERIALS
Volume 28, Issue 3, Pages 349-361Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.ijrmhm.2009.11.011
Keywords
Hard turning; CBN; Tool wear; Surface roughness; Cutting forces; RSM; ANOVA
Funding
- Algerian Ministry of Higher Education and Scientific Research (MESRS) [0301520090008]
- Delegated Ministry for Scientific Research (MDRS) [0301520090008]
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The present work concerns an experimental study of hard turning with CBN tool of AISI 52100 bearing steel, hardened at 64 HRC. The main objectives are firstly focused on delimiting the hard turning domain and investigating tool wear and forces behaviour evolution versus variations of workpiece hardness and cutting speed. Secondly, the relationship between cutting parameters (cutting speed, feed rate and depth of cut) and machining output variables (surface roughness, cutting forces) through the response surface methodology (RSM) are analysed and modeled. The combined effects of the cutting parameters on machining output variables are investigated while employing the analysis of variance (ANOVA). The quadratic model of RSM associated with response optimization technique and composite desirability was used to find optimum values of machining parameters with respect to objectives (surface roughness and cutting force values). Results show how much surface roughness is mainly influenced by feed rate and cutting speed. Also, it is underlined that the thrust force is the highest of cutting force components, and it is highly sensitive to workpiece hardness, negative rake angle and tool wear evolution. Finally, the depth of cut exhibits maximum influence on cutting forces as compared to the feed rate and cutting speed. (C) 2009 Elsevier Ltd. All rights reserved.
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