Technical Drawing Portfolio

All projects

Technical drawing Descriptive geometry Orthographic views Sketching

Role

Student

Course

Technical drawing, Spain

Date

Before SCAD

Tools

Technical pen, graphite, ballpoint

Brief

I trained in technical drawing in Spain before coming to SCAD. The cover of this portfolio says it plainly: these are the designs I could bring with me. The plates carry printed title blocks and are written in Spanish. I drew them by hand, six exercises to a sheet.

Process: from geometry to perspective

The plates start with constructions: ovals, tangent arcs, regular polygons. Then the dihedral system: point, line, plane, intersections, parallelism, perpendicularity and distances. Then views, sections, dimensioning and threads, each part next to a shaded isometric. The last block is perspective: isometric, cavalier and conical, built from the views of a part.

Plate "Cortes, acotación y roscas": orthographic views, hatched sections and dimensions beside a shaded isometric of the part — Views, hatched sections and dimensions beside a shaded isometric.

Plate with two parts drawn in three orthographic views with dimensioning and blue-shaded isometric renders — Two parts in three views, with dimensions.

Hand-drawn technical geometry plate constructing ovals and ovoids with compass construction lines — Geometry plate: ovals and ovoids by compass construction.

Dihedral system plate on planes: six exercises with traces and fold-over lines — Dihedral system: plane projections with traces.

Descriptive geometry plate of solids intersected by lines, with construction lines in blue and black — Solids intersected by lines.

Isometric drawing of a complex part from its three views on isometric grid paper — Isometric of a complex part from its three views.

Conical (linear) perspective of a checkerboard plane and an octahedron — Conical perspective: checkerboard plane and octahedron.

Outcome

Beside the plates, a set of freehand studies: transparency on glass solids in pencil, an interior in perspective, and a ballpoint car concept sheet with front, side, interior and wheel views labelled. Teacher corrections in red are still visible on the plates.

Ballpoint pen car concept sheet with front, side, interior and wheel views labelled — Ballpoint car concept sheet.

Graphite perspective drawing of an interior room with glass walls, pendant lamps, a door and a bowl on a table, with an eraser and a pencil on the sheet — Pencil perspective of an interior.

Pencil still life studying transparency and shading on a glass cylinder, sphere, cone and cube — Transparency study on glass solids.

What this shows

Orthographic views, sections and dimensioning drawn by hand, before any software. That is the logic behind the 2D drawings I make from CAD. Going from three views to an isometric, and back, is also how I check a part in 3D.

Technical Drawing Portfolio: Descriptive Geometry to Perspective

Brief

Process: from geometry to perspective

Outcome

What this shows