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Abstract
The hub and blade surfaces of an impeller are conventionally machined by a 5-axis numerically controlled machine. Efficient rough machining process plans are required in impeller manufacturing, especially, for the rough machining area partitioning and machining data verification. The blade surfaces of a machined impeller have to be measured exactly to secure the machining tolerance and surface finish of the impeller. Although a coordinate measurement machine with a rotating/tilting probe is used for this measurement, it is not easy to evaluate all the points on impeller surfaces since the measurement is very time consuming. Thus, this paper presents efficient machining and measurement plans for impeller manufacturing. A hybrid rough cut plan is proposed, first, which combines 3-axis and 5-axis machining on a machine. Second, a measurement path generation method based on a unit measurement region is introduced. A case example for an impeller is shown to demonstrate the effectiveness of proposed machining and measurement plans.