83 lines
3.3 KiB
Markdown
83 lines
3.3 KiB
Markdown
# Fillet Chamfer Last Atomic Skill
|
|
|
|
## When to use
|
|
|
|
- A machined part needs edge breaks, deburring chamfers, assembly lead-ins, stress-relief fillets, or small finishing rounds.
|
|
- The edge treatment is secondary to the main body, holes, pockets, slots, and bores.
|
|
|
|
## Do not use when
|
|
|
|
- The rounded or chamfered profile is the primary defining shape, such as an O-ring groove, cam surface, ergonomic shell, or turbine blade.
|
|
- A sharp edge is explicitly required for sealing, locating, scraping, or mating.
|
|
- The chamfer/fillet would remove critical wall thickness around a hole, shoulder, or thin rib.
|
|
|
|
## Recognition features
|
|
|
|
- SolidWorks feature evidence such as Chamfer, Fillet, radius values, or angle-distance chamfers.
|
|
- STEP evidence with conical or toroidal surfaces near final edges.
|
|
- Descriptions mentioning chamfered edges, rounded corners, smooth transitions, edge relief, assembly ease, or stress reduction.
|
|
|
|
## Core invariants
|
|
|
|
- Apply edge treatments after primary solids, holes, bores, pockets, slots, and patterns are stable.
|
|
- Keep edge treatment small relative to nearby feature size and wall thickness.
|
|
- Use chamfer for lead-in/deburring and fillet for stress relief or smooth load transition.
|
|
- Select specific edges; do not blindly fillet or chamfer every edge.
|
|
- Preserve functional shoulders, datum faces, seal lands, and fastener seats.
|
|
|
|
## Parameter roles
|
|
|
|
- `chamfer_distance` defines bevel size.
|
|
- `chamfer_angle` defines bevel angle, often 45 degrees when not otherwise specified.
|
|
- `fillet_radius` defines round size.
|
|
- `edge_set` defines which edges receive treatment.
|
|
- `minimum_wall_after_edge_treatment` protects small holes, ribs, and pockets.
|
|
|
|
## Construction sequence
|
|
|
|
1. Complete the main body and all functional cuts.
|
|
2. Identify functional edges that need lead-in, deburring, stress relief, or handling safety.
|
|
3. Apply chamfers to hole entrances, exposed outer edges, or insertion edges.
|
|
4. Apply fillets to internal corners, web transitions, and load-bearing transitions.
|
|
5. Verify that holes, slots, shoulders, and bearing seats remain intact.
|
|
|
|
## Common failures
|
|
|
|
- Adding large fillets early and causing later cuts or patterns to fail.
|
|
- Chamfering a bearing shoulder, seal land, or datum face that should remain crisp.
|
|
- Using one global fillet radius across tiny holes and large outer edges.
|
|
- Treating decorative edge rounding as more important than functional geometry.
|
|
|
|
## Evidence summary
|
|
|
|
- Current library evidence: 58 reviewed SCAD58 machined parts with final chamfer/fillet operations.
|
|
- Latest run evidence: high-frequency accepted insights for `chamfer_edges`, `chamfer_edges_for_safety`, `apply_chamfer_to_edges`, `apply_fillet_to_edges`, and stress-relief fillets.
|
|
- Frequent operations in the latest run: Chamfer and Fillet after Extrusion, Cut, HoleWzd, Pattern, and Revolution.
|
|
- Source: CAD-SkillX offline review of SCAD58 descriptions, STEP summaries, and SolidWorks feature evidence.
|
|
|
|
## Retrieval metadata
|
|
|
|
Triggers:
|
|
- `fillet chamfer last`
|
|
- `edge treatment`
|
|
- `chamfered edges`
|
|
- `filleted edges`
|
|
|
|
Secondary triggers:
|
|
- `deburr`
|
|
- `assembly lead in`
|
|
- `stress relief`
|
|
- `smooth transition`
|
|
- `edge break`
|
|
|
|
Operation triggers:
|
|
- `chamfer`
|
|
- `fillet`
|
|
- `apply edge treatment after cuts`
|
|
|
|
Exclusions:
|
|
- `primary rounded profile`
|
|
- `sharp datum edge`
|
|
- `seal land`
|
|
- `cam surface`
|