Engineering Design Drawings Engineering Design is Structured Problem

Engineering Design & Drawings

Engineering Design is Structured Problem Solving • Various problem solving frameworks: – Commonality?

Document & release the design Define the problem Test & redesign as necessary Develop alternative Build a prototype designs & select the most promising

Drawings: The Universal Language • Engineers make drawings to understand communicate ideas • Drawings are used throughout the entire engineering design process. – Freehand sketching is used for generating ideas and for communicating them – Computer-aided design (CAD) is used to for both design documentation and to evaluate design alternatives. • Engineering design still retains its artistic roots – Design requires both analysis and synthesis

Drawing Conventions: Rules of the Language • Line techniques and lettering • Planar Projections – Axonometric – Multiview drawings – Auxiliary and sectional view • Dimensioning and tolerancing • Examples

Planar Projections

Free-Hand sketches---let’s have some fun • Tools • A freehand sketch begins with proportionally laid out construction lines – Drawn thin & lightly – Guide the drawing • Object lines are thicker, dark and uniform

Drawing Lines: Techniques

Proportions • Approximating proportions • Foreshortening