JAWAHARLAL NEHRU TECHNOLOGICAL UNIVERSITY HYDERABAD

Course Objectives

• 1. To study about the CAD process and concept of geometric modelling
• 2. To study the concepts of wireframe modelling
• 3. To study the concepts related to surface modelling
• 4. To study the concepts of solid modelling
• 5. To study about geometric transformations techniques, data exchange formats and mechanical tolerance

Course Outcomes

At the end of this course, students will be able to

• 1. Understand the CAD process and geometric modelling concepts
• 2. Analyse the utility and application of wire frame modelling
• 3. Understand the concepts of surface modelling
• 4. Understand and apply the concepts of solid modelling techniques.
• 5. Understand graphics by using transformations and analyse the utility of data exchange formats with dimensioning and tolerances.

UNIT - I

CAD Tools: Definition of CAD Tools, Graphics standards, Graphics software: requirements of graphics software, Functional areas of CAD, Efficient use of CAD software. Basics of Geometric Modelling: Requirement of geometric 3D Modeling, Geometric models, Geometric construction methods, Modelling facilities desired.

UNIT - II

Geometric Modeling: Classification of wireframe entities, Curve representation methods, Parametric representation of analytic curves: line, circle, arc, conics, Parametric representation of synthetic curves: Hermite cubic curve, Bezier curve, B-Spline curvewire, NURBS, Curve manipulations.

UNIT - III

Surface Modeling: Classification of surface entities, Surface representation methods, Parametric representation of analytic surfaces: plane surface, ruled surface, surface of revolution, tabulated cylinder, Parametric representation of synthetic curves: Hermite cubic surface, Bezier surface, B-Spline surface, Blending surface, Surface manipulations.

UNIT - IV

Solid Modelling: Geometry and topology, Boundary representation, The Euler-Poincare formula, Euler operators, Constructive solid geometry: CSG primitives, Boolean operators, CSG expressions, Interior, Exterior, closure, Sweeping: linear and non-linear, Solid manipulations, feature modeling.

UNIT - V

Transformations:2-D and 3-D transformations: translation, scaling, rotation, reflection, concatenation, homogeneous coordinates, Perspective projection, orthotropic projection, isometric projection, Hidden surface removal, shading, rendering. Evaluation Criteria: Evaluation criteria of CAD software, Data exchange formats: GKS, IGES, PHIGS, CGM, STEP Dimensioning and tolerances: Linear, angular, angular dimensions, maximum material condition (MMC), Least material condition (LMC), Regardless of feature size (RFS).

R22M.Tech. CAD/CAM JNTUH

TEXT BOOKS:

• 1. CAD/CAM Concepts and Applications/ Alavala/ PHI.
• 2. Mastering CAD/CAM / IbrhimZeid / McGraw Hill International.
• 3. CAD/CAM Principles and Applications/ P.N. Rao/TMH/3rd Edition

REFERENCES BOOKS:

• 1. CAD/CAM /Groover M.P./ Pearson education
• 2. CAD / CAM / CIM, Radhakrishnan and Subramanian/ New Age
• 3. Principles of Computer Aided Design and Manufacturing/ Farid Amirouche/ Pearson
• 4. Computer Numerical Control Concepts and programming/ Warren S Seames/ Thomson. R22M.Tech. CAD/CAM JNTUH M. TECH. I Year I Sem. (CAD/CAM)