WITH EFFECT FROM THE ACADEMIC YEAR 2012 - 2013

 

ME 353

 

CAD / CAM

 

Instruction                                             4               Periods per week

Duration of University Examination     3               Hours

University Examination                         75             Marks

Sessional                                                25             Marks

 

UNIT-I

 

Design Processes: Design criteria, Alternative solutions, Alternative design, Computer Aided Design and Review.

 

Drafting Techniques: Basic geometric elements and their creation.

 

Geometric Modelling: Wireframe entities and their definition, Interpolation and Approximation curves. Concept of parametric and non parametric representation of a circle and helix curves, properties of splines.

 

Synthetic curves: Parametric representation of cubic spline, Bezier and B-spline curves, continuity, properties and characteristics. Introduction to NURBS.

 

UNIT-II

 

Surface Modeling: Analytic surfaces: Definitions of planar, surface of revolution, Tabulated cylinder, synthetic surfaces: Cubic and Bezier surfaces.

 

Solid Modeling: C - rep and B - rep approaches

 

Design Applications: Mass property calculations, Mechanical tolerancing, Finite Element Analysis, Design Review.

 

2D Transformations: Translation, Scaling and Rotation about arbitrary point, Shearing and Reflection, Homogeneous representation, concatenation.

 

UNIT-III

 

CAD Database and Data Exchange: CAD Database and Structure, IGES, STEP and STL format.

 

Numerical Control Machine Tools: Features and elements of NC, Positional, paraxial and contouring types. Definitions of axes. Definitions of interpolation, post - processor, preparatory and miscellaneous functions, Canned cycles, Tool length and cutter radius compensation. Manual and

computer aided part programming (APT) for simple components. Programming with MACROS.

 

UNIT-IV

 

Computer Numerical Control: CNC, DNC and Adaptive control systems. Typical configurations and relative features. Machining centers, Introduction to FANUC, SINUMERIC controllers. Industrial Robots: Robot Anatomy, Configurations, Controls, Drivers, Programming methods and Applications.

 

UNIT-V

 

GT: Part families, layout, part classification and coding system. Opitz, MICLASSCODE system CAPP: Variant and Generative process planning. FMS & CMS: Building blocks of Flexible Manufacturing systems and their control, Elements of CIMS. Computer Aided Inspection and QC:

 

Coordinate Measuring Machine, Non contact inspection: Machine vision, Scanning Laser Beam Devices Quality control. CAD/CAM Integration, Turnkey CAD/CAM Systems, Introduction to Rapid Prototyping Technique, Reverse Engineering.

 

Suggested Reading:

 

1. 1.Arvid R. Eide, Roland D. Jenison, Lane H. Mashaw, Larry L. Northup,

 

“Introduction to Engineering Design” McGraw -Hill, 1998.

 

1. 2.Ibrahim Zeid. CAD/CAM, "Theory and Practice", McGraw. Hill Inc. New York, 2011.

 

1. 3.Grover, MP and Zimmers E.W. "CAD/CAM", Prentice Hall of India, 1989.

 

1. 4.Rao, PN. "CAD/CAM: Principles and Applications", 2nd Edition, Tata McGraw Hill, New Delhi, 2004.

 

1. 5.Yoram Koren, "Computer Control of Manufacturing Systems",

 

McGraw Hill Int, New York, 1994.

 

1. 6.Elanchezhian. C. Sunder Selwyn. T. Shanmuga Sunder, G, "Computer Aided" Manufacturing, Laxmi Publications (P) Ltd., 2nd Edition, New Delhi, 2007.