'Computer Aided Drafting' is a course offered in the second semester of B. Tech. programs at the School of Engineering, Amrita Vishwa Vidyapeetham.
Course Objectives
- Demonstrate the importance of Computer Aided Drafting packages for industry practice
- Introduce standards and codes to produce engineering drawings
- Understand and interpret the engineering drawings
- Provide hands on training to become proficient with 2D Computer Aided drafting of simple machine elements / assemblies
Course Outcomes
- Appreciate the standard drawing codes and practices which is required for producing engineering drawings
- Construct accurate 2D geometry as per the dimensions following standard drawing practices with proper dimensioning using Computer Aided drafting software
- Create 2D representations of 3D objects as plan view, elevations, side views and sections / auxiliary views using Computer Aided drafting software
- Develop isometric drawings using orthographic views using Computer Aided drafting software
Drawing Standards - Introduction to CAD software – CAD user interface – Data input modes - Coordinate systems - Units and precision – Setting Limits and display units – Drawing templates - Features of GUI. Sketching basic geometric entities.
Sketching simple geometric entities: points, lines, circles, arcs, ellipse, rectangle, polygons, polylines, splines – Use of object snaps - Practice exercises using simple geometric entities.
Modifying drawings: Move, copy, rotate and offset drawings; Mirroring, Scaling, Trim, extend, erase, explode - Fillet and chamfering – Rectangular, Polar and Path array - Drawing exercise: Sketching and modifying 2D drawings.
Drawing properties: Line type, Line weight, Object properties – Hatch and gradient – Working with Layers - Dimensioning and annotations – Adding tolerance to dimensions – Working with text and tables – Sketching with blocks and groups - Use of attributes – Working with external references – Layout, printing and publishing drawings - Exercise involving sketching 2D orthographic views of 3D geometries with dimensions and tolerances.
Introduction to 3D - Isometric drafting - Conversion of orthographic projections of simple components into isometric views.
Project: Students have to complete a project involving creating orthographic views of the simple machine elements / assemblies such as centrifugal pumps, hydraulic cylinders, gear boxes etc. with dimensions following standard drawing practices using CAD software.
Text / Reference:
- James D Bethune, “Engineering Graphics with AutoCAD 2017”, Pearson Education, 2018.
- Gopalakrishna, R., and SudheerGopalakrishna “Computer Aided Engineering Drawing”, Subhas Publications, 2015.
- AUTO-CAD manual (In-House)
