Intermediate Part Modeling
Intermediate features
This domain moves past prismatic parts. You must be able to build revolved features (a profile plus a centerline axis that the profile does not cross), sweeps (a profile plus a path, joined by a pierce relation), and lofts (two or more profiles, optionally steered by guide curves or a centerline). Also expect Shell, Rib, Draft, Hole Wizard hole types, and the pattern family: linear, circular, mirror, sketch-driven, curve-driven, and table-driven.
Reference geometry and configurations
Reference planes, axes, and coordinate systems let you build features at angles. Configurations let one file represent several sizes, and dimensions can be driven by equations and global variables so a single change propagates through the model.
Multi-body modeling
Split, Combine, Mirror Bodies, Move/Copy Body, and Save Bodies create or manage multiple solid bodies inside one part. Patterns, shells, and cuts can be limited to selected bodies only.
Traps
Shell failures usually come from a wall thickness larger than the smallest radius. Sweep failures usually come from a path that is not tangent-continuous or a profile that is not positioned at the path start. A revolved profile that touches or crosses the axis creates self-intersecting geometry. Circular patterns need a genuine axis or cylindrical face, and rib thickness direction (the flip arrow) is frequently reversed in exam figures.
Rule of thumb
Before creating a sweep, sketch the profile on a plane that intersects the start of the path and add a pierce relation between the profile and the path. If the preview twists, edit the profile orientation. For shells, set the thickness first, then confirm which faces are removed and which are kept.