This document provides an overview of Computer-Aided Manufacturing (CAM) in three parts. It introduces CAM and discusses how it is used with CAD. It then explains the role of Computer-Aided Process Planning (CAPP) in transitioning from CAD to CAM. Finally, it introduces the MasterCAM software, describing its uses in tool path planning and CNC code generation to manufacture machined parts.

1. Jimma Institute of Technology
Jimma University
Faculty of Mechanical Engineering
Course title: CAD/CAM and CIM
Course no. MENG 5321
ECTS 5 Cr.Hr:3
By: Amanuel Diriba
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2. LECTURE 18
CHAPTER - 3
Computer – Aided Manufacturing
(CAM)
Outlines
3.1 Introduction to CAM
3.2 CAD/CAM
3.3 Master CAM software
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3. 3.1 Introduction to CAM
What is Manufacturing?
• Process of production of object from metals or non
metals, with or without application of force, with or
without application of heat, with or without use of
machines, joining or removal of excess material.
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4. Cont..
Example of manufacturing process
 Chemical process
 Mechanical process as bending
 NC/CNC process
 Casting
 Molding
 Forming
 Machining
 Joining
 Rapid manufacturing .. etc.
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5. Why we need computer for design and manufacturing ?
For example: We are dealing with 20,000 parts in a car
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6. Now…. with computer
CAD (Solid Modeling)
CNC Manufacturing
CAA
(Computer
Aided
Analysis)
CAM (Computer Aided
Manufacturing) /Direct
Manufacturing
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8.  Computer – Aided Manufacturing (CAM)
• CAM is the use of computer system to plan, manage, and
control the operations of manufacturing plants through
either direct or indirect computer interface with plant’s
production process.
• CAM is the use of computer based software tools that
assist engineers and machinists in manufacturing or
prototyping product components.
• CAM – utilize part geometer defined by CAD drawing.
• CAM – use the materials tools, work serious that can be
used in actual machining process.
• CAM – use computers in process planning , scheduling,
shop floor control, work study, quality control .. etc.9/17/2019 Lecture 17 CAM 8

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10. Cont..
1. CAM application in Manufacturing
planning
– Computer aided process planning
– Computer assisted NC part
programming
– CAD/CAM assisted NC part
programming
– Computerized machinability data
system
– Computerized work standards
– Cost estimating
– Production and inventory planning
– Computer aided assembly line
balancing
2. CAM application in Manufacturing
control
– Process monitoring
– Quality control
– Shop floor control
– Inventory control
– JIT – Just In Time production system
– CAQ (computer-aided quality
assurance)
– CAI (computer aided Inspection)
CAM application can be divided into two broad
categories.
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11. Cont..
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12. 3.2 CAD/CAM
• It’s integration of CAD/CAM
• Concerned with the engineering function in both design and
manufacturing .
• Denotes an integration of design and manufacturing activities by
means of computer system.
• Goal is to not only automate certain phases of design and certain
phases of manufacturing , but to also automate the transition
from design to manufacturing.
CAD/CAM > CAD + CAM
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13. Cont..
 In the ideal CAD/CAM system , the product design specification resign in the
CAD data base would be automatically converted into process plan for making
the product using CAPP.
CAD
C
A
P
P
CAM
Initial stage
 Developing individual part
modeling
 Developing Assembly modeling
 Analyzing and optimizing of the
model
 Finally designed object
Interface
between
CAD/CAM
• Controls the
Manufacturing using
CNC and other devices
Product
CAD (model created)  Engineering analysis (verified)  CAPP
 input to CAM software  CAM controls the Manufacturing
using CNC and other devices  product
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14. Cont..
Computer aided Process Planning(CAPP) systems
– Used to prepare process plan using computer system.
– used -to prepare route sheets. (off line).
Process plan
Process plan contains :
– detailed instructions for making a part or a component.
– sequence of operations, machines, tools, speeds and
feeds, dimensions, tolerances, stock removed, inspection
procedures and time standards (i.e., cycle time).
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15. Cont..
 Route Sheet
• It is called Route Sheet, because - lists the machines
(machine tools) through which the part is routed
• Used for manual process plan or offline process plan
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computer software includes
 finite element analysis (FEA)
computational fluid dynamics (CFD)
 multibody dynamics (MBD)
optimization.
Mechanical software's –>
AUTOCAD, PRO-E, CATIA …..
CAD (model created)  Engineering analysis (verified)  CAPP  input to CAM
software  CAM controls the Manufacturing using CNC and other devices 
product
• Example
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18. 3.3 Introduction to Master CAM Software
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19. Cont..
Master CAM
 Is most widely used CAD/CAM.
 Is a suite of computer- Aided manufacturing(CAM) and
CAD/CAM software applications.
 Allows tool path planning and NC code generation for
a given parts. This part can either be drawn in Master
CAM or imported from other CAD packages.
 Is a three – dimensional geometry creation engine
along with features to aid in tool path generation and
verification.
 It’s also guided computer numerical controlled(CNC)
machine tools in the manufacture of parts.(can
generate CNC code automatically)
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20. Cont..
• Master CAM’s comprehensive set of predefined tool
paths including contour, drill, pocketing, face, peel mills,
engraving, surface high speed, advanced multi axis, and
many more enable machinist to cut parts efficiently and
accurately.
What do we need to begin Master CAM ?
• Part geometry
• Draw or import
• Tooling
• Library or create
• Process plans
• Fixtures
• Define orientation and location
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