Machining capability of a 2-D of parallel kinematic machine tool and conventional CNC milling machine

Abstract Machining performance of an optimally designed prototype of a 2 degree of freedom PKM (parallel kinematic machine) is optimized in this work. The effect of machining parameters upon the surface quality of machined components is studied. Pocket milling operations are performed at various feed, speeds, and depth of cut on PKM and conventional CNC milling machine. The surface roughness of the machined component is measured, and the results are compared. Taguchi approach is used to design the experiment and analysis of variance is employed to obtain the optimal cutting conditions. The depth of cut is noticed as the most significant parameter that affect the surface roughness. The first version of the PKM prototype shows machining performance similar to the conventional CNC machine. The study establishes the machining capability of PKM and offers scope for developing dynamically superior substitute over the CNC machine tool.

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