Chapter 2 ComputerAided Design CAD

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Chapter 2Computer-Aided Design (CAD)
2
Agenda

• The Product Design Process
• CAD/CAM Systems
• Selection of CAD/CAM Systems

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The Product Design Process
Customers
Problem Identification
Preliminary Ideas
Modify the Problem and Its Constraints
Refinement Process
No
Criteria Satisfied
Analysis and Decision Processes
Implementation
Yes
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CAD/CAM Systems

• Computer-aided design (CAD) refers to the design
  process with the aid of computers

• Computer-aided design drafting (CADD) is used to
  generate working drawing and other engineering
  documents using computers

• Computer-aided manufacturing (CAM) refers to the
  manufacturing process with the aid of computers

• Integration of CAD and CAM CAD/CAM systems in
  both hardware and software

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Basic Architecture of a CAD System

• A CAD system hardware, application software, OS
  software

• CAD/CAM systems classification
• Mainframe-based systems
• Minicomputer-based systems
• Workstation-based systems
• PC-based systems

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Basic Architecture of a CAD System
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Selection of CAD/CAM Systems

• Using weighting scheme for characteristics of
  CAD/CAM systems (cost, after-sale service, etc.)

• System-related issues hardware, software,
  maintenance, and service support.

• Geometric modeling-related issues types and the
  integrations of modeling representations,
  coordinate systems, data exchange standards.

• Design documentation and applications generate
  quality engineering drawing, support a numbers of
  applications (design analysis, NC part
  programming, CAPP, CIM and robot applications,
  etc.)