Mechanical CAD Model and Engineering Drawing
6 weeks · 0 milestones
Produce a fully constrained 3D CAD model of a real mechanical component and a 2D engineering drawing to engineering drawing standards. The component must be non-trivial (at least 5 geometric features, not a simple block or cylinder). The engineering drawing must include: all views necessary to fully define the geometry, dimensions with correct GD&T callouts for at least 3 critical features, surface finish specification, material callout with grade/standard (e.g. Al 6061-T6, S275 structural steel), and a title block with part number, revision, scale, and projection standard. Preferred proof: a component designed for a real project (personal, academic, or professional) with physical fabrication evidence (photo of machined or 3D-printed part). Accessible alternative: a CAD model and drawing produced in FreeCAD (free, open-source) or Onshape (free education tier) for a realistic component scenario — no physical fabrication required, but the drawing must be to standard. Proof artifacts: the CAD file and engineering drawing (design artifact) and the material + tolerance specification (documentation artifact). Verification: a mechanical engineer reviews the drawing for standards compliance — 'these tolerances cannot be manufactured — what process were you specifying for?' and 'what does this GD&T callout mean in inspection terms?'
Milestone map
Milestone map
3 milestones
Choose a real or designed mechanical component — a bracket, shaft, housing, linkage, or similar. Before modelling, establish the drawing standards you will follow: first-angle or third-angle projection, tolerancing convention (ISO or ASME Y14.5), and title block format. Planning standards before modelling prevents the most common technical drawing error: inconsistent projection or tolerancing that makes the drawing unmanufacturable.
Proof required
Submit your drawing plan (≥300 words): the component you selected (description and rough sketch), the drawing standards you will use (projection angle, tolerancing standard, unit system), and the title block fields you will complete.
What gets checked
- Component is specific — a named part with a function, not just 'a mechanical component'
- Drawing standard is stated for all three elements: projection, tolerancing, and units
- Title block fields are listed including drawing number, scale, material, and projection symbol