Manufacturing & Shop Practice
Related: manufacturing-cim
Cheat sheet
Formulas
Heat input welding ~ V I / travel speed — affects HAZ
Fit-up gap & edge prep drive weld quality
Bend allowance / K-factor for sheet metal flats
Additive layer height vs orientation strength anisotropy
Weld size ≈ load / (allowable throat stress × length)
3D print: layer height vs time/strength tradeoff
Laser kerf compensation in nests
Definitions
- WPS/PQR
- Welding procedure spec / qualification record
- Distortion control
- Sequence, fixturing, intermittent welds
- HAZ
- Metallurgical change adjacent to weld
- DfAM
- Design rules for additive — overhangs, supports
- Process plan
- Sequence of ops from stock to finish
- Fixture
- Repeatable location for quality & cycle time
Topic-wise short notes
Fab & joining
- MIG/TIG/stick selection by material/position/productivity.
- Bolted vs welded vs adhesive — inspection & disassembly.
Additive & laser
- Anisotropy: load along vs across layers.
- Laser cutting kerf & HAZ on thin sheet.
Exam traps & quick notes
- CNC, welding, fab, FDM/SLA, laser.
- 15 m sheet-metal wind tunnel: shear, bend, weld.
- Link academic manufacturing-cim.
- Cleanliness & joint prep beat exotic parameters.
- Measure twice — scrap metal is expensive education.
- PPE and fume extraction non-negotiable.
Comprehensive notes
Fab & joining
Weld symbols, distortion control, fit-up; bolted vs welded tradeoffs.
External: Lincoln welding guides ↗ AWS education ↗
Additive & laser
Orientation, supports, anisotropy; laser cutting nesting efficiency.
External: Formlabs design guides ↗