Geometry

Strategy

Part definition

Stock to leave on

Start offset

Strategy

When using the Roughing technology, the following machining strategies are available:

Parallel to Hub – In this strategy, all layers are offsets from the hub surface. The hub and the shroud surfaces are not parallel, therefore, the slices intersect with the shroud surface at some point. The slices are trimmed.
Parallel to Shroud – In this strategy, all layers are offsets from the shroud surface. The hub and the shroud surfaces are not parallel therefore, the slices intersect with the shroud surface at some point. However, the slices are not trimmed away. Instead the slices are extended till they reach the hub surface edge.
Morph between Hub and Shroud – In this strategy, the layers are equally distributed between the shroud and the hub. The cuts are neither trimmed nor extended.
SWARF – In this strategy, the blade and splitter surfaces are finished using the whole flute length of the tool, while the tool tip follows the surface topology of the hub. Utilizing SolidCAM's SWARF technology, the target surfaces are produced with only one cut. This strategy is available only in the Blade Finishing technology. .

Part definition

Blades- The blade surface is a free form surface with a double curved shape. Each blade has a leading edge and a trailing edge. The leading edge is the suction side for the transported medium. The trailing edge is the exhaust side.

Splitters- A splitter is a short blade; similar to the main blade. It is located between the main blades. Usually a single splitter is used, however there are impellers that might have two splitters or even more. The leading edge can be horizontal or tilted.

Fillets- The fillets are part of the blade. They guarantee a rounded connection between the blade and hub. The fillets can have a constant radius as well as a variable radius.

Hub- A hub is a revolved floor surface on which all the blades are placed.

Shroud- The shroud surface is the top surface of the blade and the splitter, usually an overturned surface from the stock. However, it can also be a free-form surface.

Stock to leave on

This option sets a clearance offset between the specified parts of the tool and check surface.

Start offset

This option allows you to define an offset value below the shroud for cutting.