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Engineering Drawing & CAD

Video Module 1: Mechanical Foundations

Engineering Drawing & CAD

Engineering Drawing:- Engineering Drawing is a graphical language of engineers used to communicate technical ideas, shapes, sizes, and specifications of components accurately.

Importance
- Provides exact shape, size, and dimensions
- Universal method of technical communication
- Essential for manufacturing, assembly, and inspection
Main Topics
- Drawing Instruments & Lettering
- Geometrical Constructions
- Orthographic Projection (Front, Top, Side views)
- Isometric Projection
- Sections & Sectional Views
- Dimensioning & Scales
- Machine Drawing (basic parts)
Applications
- Mechanical component design
- Production planning
- Quality control & inspection

CAD (Computer-Aided Design):-CAD is the use of computer software to create, modify, analyze, and optimize engineering drawings.

Advantages of CAD
- Faster drafting compared to manual drawing
- Easy editing and modification
- Better storage & sharing of drawings
- Supports 2D and 3D modeling
- High accuracy & precision
Common CAD Software
- AutoCAD
- SolidWorks
- CATIA
- Creo
- Fusion 360
CAD Features
- 2D drafting (plans, layouts)
- 3D modeling & assembly
- Layer management
- Dimensioning & annotations
- File formats: DWG, DXF, STEP, IGES

Difference Between Engineering Drawing & CAD

Engineering Drawing	CAD
Manual drawing method	Computer-based drawing
Uses drawing instruments	Uses software tools
Time-consuming	Fast and efficient
Difficult to modify	Easy to edit & update