ME 411
CAD/CAM
Mechanical Engineering
Faculty of Mechanical Engineering, GIKI
ME-418 CAD/CAM
Engr. Izhar
Email: izhar@cecos.edu.pk
General Instructions
Faculty of Mechanical Engineering, GIKI
ME-418 CAD/CAM
Instructors
Engr. Izhar
Text Book
Mastering CAD/CAM by Ibrahim Zaid (McGraw-Hill)
References
CADCAM From Principals to Practice by Chris
McMohan and Jimmie Browne. (ADDISON-WESLEY)
Lab work
PRO/Engineer and Ansys
CH # 1
Faculty of Mechanical Engineering
Ghulam Ishaq Khan Institute, Topi, Swabi
Faculty of Mechanical Engineering, GIKI
ME-418 CAD/CAM
INTRODUCTION
Introduction
Faculty of Mechanical Engineering, GIKI
ME-418 CAD/CAM
An essential tool for mechanical design and
drafting
More than one million mechanical engineers and
designers worldwide use advanced 3-D solid
modeling technology
Another two million use 2-D mechanical drafting
A Key for Improved Productivity
Entire automobiles, airplanes, and jet engines are
being designed in an integrated (CAD/CAE/CAM)
manner.
Internet is being used to exchange design data
worldwide.
Products that previously took several years to bring
to market can be developed in just months.
The products are more reliable, meet customer
expectations, better, and are less costly to
manufacture.
Typical product cycle
ME-418 CAD/CAM
Faculty of Mechanical Engineering, GIKI
Introduction
Activities includes
Simulation (kinematics, dynamics)
Analysis
Design optimization
Manufacturing
Process planning (Assembly and manufacturing)
Data management
Collaboration
Some time it is also called computer assisted
design and computer aided design and
drafting CADD.
Faculty of Mechanical Engineering, GIKI
ME-418 CAD/CAM
Product life Cycle
The design process starts with
Need identification
Conceptual design
Embodiment design
Detail deign
Process planning
Production plan
Tool procurement
Material procurement
Machine programming
Jigs and fixtures
Manufacturing
Faculty of Mechanical Engineering, GIKI
CAx Starts here
ME-418 CAD/CAM
CAD History
1953, Ivan Sutherland developed the first
CAD system called Sketchpad.
PhD in Massachusetts Institute of Technology
Advance computer of the time
TX-2, 320 kb memory and 8 mb magnetic tap,
7 inch monitor and a light pen.
He produced drawings with Sketchpad.
The first CAD software is PRONTO
developed in 1957 by Dr. Patrick Hanartty of
General motors. He is known as the father of
CAD/CAM.
Faculty of Mechanical Engineering, GIKI
ME-418 CAD/CAM
CAD History
Faculty of Mechanical Engineering, GIKI
ME-418 CAD/CAM
1960, many CAD systems came to market like
APPLICON, Auto-trol, computer vision, McAuto,
SDRC
1972, Mathematics Application Group introduced
the first 3D solid modeling software Syntha
Vision
1982, IBM launched its first PC, and AutoDesk
was founded. AutoCAD 1 released in 1982.
1985, CATIA was released which was only CAD.
1985, PTC emerged in the market with the brand
name Pro/Engineer. It was a complete
CAD/CAM system.
CAD Software examples
Sketchpad
CADKey
Microstation (civil)
SDRC IDeas
Computer Vision
CATIA
AutoDesk Inventor
SolidWorks
ProE
PowerShape
CADDS
Faculty of Mechanical Engineering, GIKI
SolidEdge
Unigraphics
AutoCAD
Intergraph
ANSYS
NASTRAN
ADAMS
ProMechanica
Fluent
MasterCAM
PowerMill
Vericut
ME-418 CAD/CAM
CAD/CAM System
Faculty of Mechanical Engineering, GIKI
ME-418 CAD/CAM
A CAD/CAM system is a complex application
that requires both hardware and software.
Software are mostly written in primary
languages like C, C++, Fortran, Java
CAD/CAM systems may run as client or stand
alone
Functions of CAD/CAM System
Faculty of Mechanical Engineering, GIKI
ME-418 CAD/CAM
Specification of Design Geometry
Computer-aided drafting (interactive graphics
programming and user interface)
Geometric Modeling and Representation
Computer model of part and assembly design
(data structure and data base design)
Visualization
Architecture view of a design
Functions of CAD/CAM System
Faculty of Mechanical Engineering, GIKI
ME-418 CAD/CAM
Manufacturing
Assemblies
Sheet metal work
Die/Mold design
Machining
Structure design
Process plan
Animation and Simulation
Mechanism
Tool path generation
Robot trajectory
Functions of CAD/CAM System
Faculty of Mechanical Engineering, GIKI
ME-418 CAD/CAM
Pre- and Post-interfaces to Finite Element
Analysis Programs
Automated mesh generation
Graphical display of stress distribution
Design Automation
Design optimization
Design for manufacturing
Design for automated assembly
Concurrent engineering design
Prototyping / Reverse Engineering
CAD disciplines
Faculty of Mechanical Engineering, GIKI
ME-418 CAD/CAM
Activities of CAD process include mass properties,
FEA, dimensioning, tolerencing, assembly modelling,
generating shaded images, documentation and
drafting
CAD process utilizes
Geometric modeling feature based, primitives
Computer graphics 2d 3d transformation
Design tools analysis etc.
CAM disciplines
Faculty of Mechanical Engineering, GIKI
ME-418 CAD/CAM
Activities of CAM process include CAPP (computer
aided process planning), NC (numerical control)
programming, design of injection moulds, CMM
(coordinate measuring machines) verification,
inspection, assembly via robots, and packaging
CAM process utilizes
CAD data Solid model
Automation Networking etc
Manufacturing data Tool path, GM codes
CAD/CAM
ME-418 CAD/CAM
Faculty of Mechanical Engineering, GIKI
Acquiring a CAD/CAM System
CAD/CAM systems are classified in four groups
1. Low end systems
AutoCAD
ProDesktop
CadKey
2. Midrange systems
SolidWorks
ProE
MasterCAM
3. High end systems
IDEAS
Unigraphics
CATIA
4. Specialized systems
Faculty of Mechanical Engineering, GIKI
ME-418 CAD/CAM
Acquiring a CAD/CAM System
Faculty of Mechanical Engineering, GIKI
ME-418 CAD/CAM
The selection of the CAD/CAM system is greatly
influenced by the size and complexity of the
product of the company.
A shoe making company will look for a system
which is good in surface modeling
Automobile industry will search for a system
which can solve complex problems of sheet metal
and die/mold design.
The manufacturer of parts on CNC will be
interested in a good CAM system.
Conceptual design
ME-418 CAD/CAM
Faculty of Mechanical Engineering, GIKI
Conceptual design
ME-418 CAD/CAM
Faculty of Mechanical Engineering, GIKI
Conceptual design
ME-418 CAD/CAM
Faculty of Mechanical Engineering, GIKI
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