CNC MILLING OF IMPELLER BLADE BY MACRO PROGRAMMING
Keywords:
Impeller blade, MACRO Programming, Tangent Arc method, Bezier SplineAbstract
During machining of the curved profile, the tool path is converted into linear segments conventionally. It results in deviation of the tool path from the actual curved profile to be machined. MACRO programming technique for the parametric interpolation has been widely used due to its simplicity. Various programming methods, including conventional linear and circular interpolation as well as MACRO programming are studied in the present work. The geometry of impeller blade is studied as a curved tool path. Point cloud for the blade profile is scanned with needle scanner. These points are fitted to cut the blade with linear interpolation and obtained from series of arc of different radius. An inner surface and outer surface of blade profile are machined with Explicit, Implicit and Bezier spline function. In another approach, blade profile is segmented into three circular arcs to develop algorithms for MACRO programming.
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