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- W2559801491 abstract "This paper provides details about experimental investigations of the effects of the influence of the aforementioned three - cathodic arc evaporated - PVD coatings and one tool substrate material on the ‘classical’ cutting process as a whole, which is also investigated qualitatively and quantitatively, using findings obtained from orthogonal cutting tests performed on Bisalloy 360 Grade steel work piece material. The experiments looked at variations in the chip formation, the cutting force components and power, as well as the tool-chip friction. The results were then studied and compared qualitatively and quantitatively over a wide range of operation variables for the coated and uncoated HSS tools. The data on qualitative effects were analyzed by comparing the trends in the measured and derived quantities such as force components, deformation characteristics and rake face friction with changes in cutting variables to the typical trends noted in the open literature sources. For this purpose the shear angle, shear stress and friction angle, known as the basic cutting quantities, were evaluated from the chip length ratio and the measured force components using the modified thin shear zone (plane) cutting analysis for each cut taken. Various statistical methods such as regression analysis, analysis of variance and covariance, Bartlett test and Welch test were employed to compare all the qualitative trends produced by the coated and the uncoated tools employed in the orthogonal cutting tests. These statistical methods were also used for comparing the quantitative effects of the coated and the uncoated tools on the magnitudes of the forces and basic cutting quantities in the orthogonal process. The results showed that the qualitative trends for the coated and uncoated tools were similar. This means that the modified mechanics of cutting analysis applied equally for both coated and uncoated tools. It also means that the ‘unified mechanics of cutting approach’ to force and power prediction for drilling and other operations should apply to both coated and uncoated tools. Finally, the orthogonal tests results were used to study and compare the effects of each coating – TiN, Ti(Al, N) and Ti(C, N) - on the basic cutting quantities, chip formation, forces and power as well as the cutting process. It was found that the group of coatings was able to reduce ‘on average’ FQt/b (thrust force component/width of cut ratio) values by 24.9%, FPt/b (power force component/width of cut ratio) values by 14.5%, β (friction angle) values by 16.4% and φ (shear angle in shear zone/plane) values by 11.06%." @default.
- W2559801491 created "2016-12-16" @default.
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- W2559801491 date "2008-01-01" @default.
- W2559801491 modified "2023-09-23" @default.
- W2559801491 title "A STUDY OF DRY MACHINING PERFORMANCE OF THE TiN, Ti(Al,N) AND Ti(C,N) COATINGS AND A M35 HSS TYPE TOOL SUBSTRATE MATERIAL ASSESSED THROUGH BASIC CUTTING QUANTITIES GENERATED WHEN ORTHOGONAL TURNING A BISALLOY 360 GRADE STEEL WORK-PIECE MATERIAL" @default.
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