MACHINING PERFORMANCE ANALYSIS OF CUTTING TOOL MATERIALS IN HARD TURN-ING OF BEARING STEEL
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Date
2021
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ACADEMIC JOURNAL OF MANUFACTURING ENGINEERING
Abstract
The objective of this experimental study is to evaluate the performance of three tool materials (mixed ceramic (CC650), PVD-coated carbide tool (GC1025) and CVD-coated carbide tool (GC4015)) during hard turning process of bearing steel 100Cr6 (66HRC) under dry environment. To do this, long-term tests used out to determine the tools life, productivity and machined surface quality in relationship with variation of the cutting speed and feed. The admissible parametric of cutting conditions has been obtained in order to reach a compromise tool life, its productivity and machined surface quality of part. Results showed that cutting speed is the most important factor affecting tool life but surface roughness was mainly influended by feed. Second order regression models was developed to find out the relationships between cutting speed and tools life time in the one hand and the correlation between tools life time and feed rate on the other hand. The results were compared to the litterature. For comparative study, the results showed that ceramic tool has been characterized by a good productivity and better surface quality compared to PVD-coated carbide tool. The latter was in turn more efficient than CVD coated carbide tool, which beyond the cutting speed 75 m/min was unproductive
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ACADEMIC JOURNAL OF MANUFACTURING ENGINEERING, VOL.19, ISSUE 4/2021