Introduction to CAD, CAM and CAE
• Understand the various spheres of manufacturing activity
where computers are used
• What is meant by product cycle with the differences
between the conventional and computer based
• Definitions of various computer based applications
• Computer Aided Design and its applications
• Various types of manufacturing organizations
• Computer Aided Manufacturing and its application
• Meaning of Computer Integrated Manufacturing
• Nowadays, computers become very crucial to daily life –
aids users in daily task/work.
• CAD/CAM are widely used in engineering practice:
COMPUTERS IN INDUSTRIAL
• The role of computer in manufacturing
may be broadly classified into two
1. Computer monitoring and control of the
2. Manufacturing support applications, which
deal essentially with the preparations for
actual manufacturing and postmanufacture
• CAD - computer aided design.
• CADD - computer aided design and drafting.
• CAE - computer aided engineering.
• CAM - computer aided manufacturing.
• CAPP - computer aided process planning.
• CATD - computer aided tool design.
• CAP - computer aided planning.
CAD/CAM Major Areas
1. Geometric modeling
2. Computer graphics
3. Design application
4. Manufacturing Applications
COMPUTER AIDED DESIGN
• Design is an activity which needs to be
well organized and take into account all
influences that are likely to be
responsible for the success of the
product under development.
• The complexity of the design process increases
with the number and diversity of components
present in the final part.
• Product functions
• Product Specifications
• Conceptual design
• Ergonomics and Aesthetics
• Detailed Design
• Prototype development
• Design for Manufacture
• Design for Assembly
ADVANTAGES OF CAD
• Is faster and more accurate than conventional
• A very easy task.
• Never have to repeat the design or drawing of
• Accurately calculate the various geometric
• Use of standard components (part libraries)
• 3D (3 dimensional) visualization capabilities
1. Mass production ─ large lots e.g.
2. Batch production ─ medium lot sizes e.g.
industrial machines, aircrafts, etc.
3. Job shop production ─ small lots or one off,
e.g. proto-types, aircrafts, etc.
• Process planning
• Process sheets
• Route sheets
• Cutting tools
• Jigs and Fixtures
• Dies and Moulds
• Manufacturing Information
• CNC Part programs
• Robot Programs
• Inspection (CMM) programs
• Production Organization
• Bill of Materials
• Material Requirement
• Production Planning
• Shop Floor Control
• Plant Simulation
• Marketing and Distribution
ADVANTAGES OF CAM
• Greater design freedom
• Increased productivity
• Greater operating flexibility
• Shorter lead time
• Improved reliability
• Reduced maintenance
• Reduced scrap and rework
• Better management control
• The use of information technology for supporting
engineers in tasks such as analysis, simulation,
design, manufacture, planning, diagnosis and
• CAE tools are being used, for example, to
analyze the robustness and performance of
components and assemblies including
simulation, validation and optimization of
products and manufacturing tools.
AREAS OF CAE
• Stress analysis on components and assemblies
using FEA (Finite Element Analysis)
• Thermal and fluid flow analysis - Computational
fluid dynamics (CFD)
• Mechanical event simulation (MES)
• Analysis tools for process simulation for
operations such as casting, molding, and die
• Optimization of the product or process.
ADVANTAGES OF CAE
• Reduce product development cost and time
• Precise analysis and simulations
• Early prediction of results
• Design verification through simulation without
having to use physical prototype testing
• Minimize the time for optimizing products
• Parallel task can be done along the design