Special Steel Machining operations
The machining operations available in UG are classified into drilling, milling, turning, and wire EDM operations. Drilling operations are machining processes for hole features, such as spot drilling, standard drilling, boring, reaming, counterboring, countersinking, and tapping. Milling operations are machining processes for milling features, which can be further classified into planar milling, cavity milling, contour milling and multi-axis milling operations. For prismatic Machining features only 2.5 axis operations, drilling, planar milling, and cavity milling, are involved in this research.
The spot drilling operation is used to provide starting holes for other drilling operations. The drill operation is the primary hole making operation used to drill basic holes. The boring operation is to enlarge a previously drilled hole with a singlepoint tool and produces a close tolerance and fine finish. The reaming operation is used to smooth and accurately size a previously drilled hole with a reamer.
The planar milling operation creates tool paths that remove material in planar layers by cutting levels perpendicular to the tool axis. Planar milling uses boundaries to define part geometry. It is intended for parts that have vertical walls and planar islands and whose floors are normal to the tool axis. Planar milling can also perform single and multiple pass profile Machining of open and closed boundaries. Face milling is a special case of planar milling and designed specifically to rough and finish the planar faces of a part. It allows users to specify the face geometry by simply selecting the faces to be machined. The tool axis is automatically defined as the normal of the selected face plane.
Cavity milling removes material in cut levels that are perpendicular to the tool axis. It is similar to planar milling in the way that it uses a fixed tool axis and removes the material in planar cut levels. Cavity milling uses bodies, faces, or curves to define part geometry. Therefore it can be used for parts with tapered walls and contoured floors.
By Min Hou “CAD/CAM Integration Based on Machining Features for Prismatic Parts”
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