Engineering Drawing & CAD Basics

Engineering Drawing:- Engineering Drawing is a technical language of engineers. It is used to represent objects, machines, and structures clearly and accurately on paper using standardized rules, symbols, and dimensions. These drawings help engineers, technicians, and workers understand shape, size, position, and manufacturing detailsof an object.

• Key Points of Engineering Drawing:
  • Uses standard tools like drawing board, scale, compass, set squares
  • Follows international standards (BIS / ISO)
  • Communicates ideas without words
  • Essential for manufacturing, construction, and assembly
• Main Topics in Engineering Drawing:
  • Lines, lettering, and dimensioning
  • Scales and geometric constructions
  • Orthographic projection (front, top, side views)
  • Isometric views (3D representation)
  • Sectional views and symbols

CAD (Computer-Aided Design) Basics:- CAD means creating engineering drawings using computer software instead of manual tools. It improves accuracy, speed, and ease of modification.

• Why CAD is Used:
  • High precision and neat drawings
  • Easy editing and corrections
  • Faster drafting and design
  • Easy storage and sharing of drawings
• Common CAD Features:
  • Drawing tools: line, circle, arc, rectangle
  • Modify tools: move, copy, rotate, trim
  • Layers for organized drawing
  • Dimensioning and text tools
  • 2D drafting and basic 3D modeling
• Popular CAD Software:
  • AutoCAD
  • SolidWorks
  • Fusion 360
  • CATIA

Difference Between Engineering Drawing & CAD Basics