| Description |
xiii, 121 leaves : illustrations (some colored) ; 29 cm |
| Summary |
"This thesis presents the results of experimental investigation of the effects of cutting parameters (spindle speed, feed per tooth, axial depth of cut and radial depth of cut) on the three components of cutting forces (F[subscript x], F[subscript y], F[subscript z]), workpiece temperature and surface roughness in end-milling of Hastelloy C-2000 alloy using design of experiments (DOE) and response surface methodology (RSM). End-milling experiments were conducted using 0.5 inch diameter end-mill on Cincinnati Milacron Sabre 750 vertical machining center using water based flood coolant. An inscribed central composite design of experiment was used to study the four factors at five levels. A Kistler type 9257 A 3- component force dynamometer was used to measure cutting force components F[subscript x], F[subscript y], F[subscript z]. An ungrounded K-type thermocouple probe was inserted into a pre drilled hole in the workpiece to measure the temperature (T), and surface roughness (R[subscript a]) was measured using a portable Brown&Sharpe Pocket Surf which uses a piezoelectric probe for measurement. It is observed that a linear model was inadequate to model the end-milling process and a second order model was developed form [sic] the linear model and was found to be adequate in all cases. It is observed that the interaction effects of factors are significant in determining components of cutting force, workpiece temperature and surface roughness. It is also observed that feed per tooth is a common factor that has significant effect on all the three responses examined. The optimum cutting parameters to obtain minimum cutting force components, workpiece temperature and surface roughness were determined using ANOVA and are presented. The Pareto chart and the marginal means plot showing the effect of each parameter on cutting force components, workpiece temperature and surface roughness are also presented"--Abstract, leaf iv. |
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