Introduction to CAD/CAM/CAEIntroduction to CAD/CAM/CAE

Human-Centered CAD Lab.

1 2009-09-02

IntroductionIntroductionCAD(Computer Aided Design)CAM(Computer Aided Manufacturing)CAE(Computer Aided Engineering)( p g g)

Memory capacity, processing speed,Interactive graphics

Quality, Cost, Delivery

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Product Development CycleProduct Development Cycle

Design Design Feasibility Study with

SynthesisDESIGN PROCESS

Need Spesifications Collecting Design Information

Design Design Design Design Analysis Design

Analysis

DesignDocumentation

DesignEvaluation

DesignOptimization

DesignAnalysis

AnalysisModel Conceptuali-

zation

P Q lit

CAD + CAE

ProcessPlanning

ProductionPlanning

Design andProcurement of

Producttion QualityControl Packaging Shipping

CAMNew Tools

Order Material

NC, CNC, DNCProgramming

Marketing

3MANUFACTURING PROCESS

Conceptual DesignConceptual Design

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Solid model of example partSolid model of example part

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Finite element analysis model of example partpart

Finite element meshes

Load condition: case 1

Load condition: case 2

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Stress distribution on example partStress distribution on example part

Result for case1 Result for case2

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Fill time distribution for example partFill time distribution for example part

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Physical prototype of example partPhysical prototype of example part

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Part drawing of example partPart drawing of example part

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Core cavity and side cores for example partCore, cavity and side cores for example part

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Completely designed mold baseCompletely designed mold base

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NC tool paths to machine partNC tool paths to machine part

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Roles of Computer in Product Development CycleCycle

Quick generation of design conceptsComputer aided drafting systemGeometric modeling systemParametric modeling

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Roles of Computer in Product Development Cycle cont’Cycle – cont

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Roles of Computer in Product Development Cycle cont’Cycle – cont

Powerful analysis capabilityStress analysis, interference checkingKinematic analysis, etc.Analysis model with proper abstractionInteractive generation of analysis model

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Roles of Computer in Product Development Cycle cont’Cycle – cont

Easy prototyping for design evaluationRapid Prototyping (RP)Virtual Prototyping (VP)

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RP Stereolithography ProcessRP - Stereolithography Process

El tXY Scanning Ultraviolet Laser Beam

Top of the Liquid

Elevator

Cured Plastic

Photo-curableResin(Liquid)

Vat

Platform

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Platform

Virtual Prototyping of Car BodyVirtual Prototyping of Car Body

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Simulation for Testing ProductCar Motion Test

Simulation for Testing Product

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Roles of Computer in Product Development Cycle cont’Cycle – cont

Easy design documentationComputer aided drafting systemAutomatic drafting program

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Roles of Computer in Product Development Cycle cont’Cycle – cont

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Roles of Computer in Product Development Cycle cont’Cycle – cont

Automatic generation of process planAutomatic generation of NC programAutomatic generation of program for Robot, CMMg p g ,

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Definitions of CAD CAM and CAECAD, CAM and CAE

CADCreation, modification, analysis, optimizationComputer graphics + application program for designTolerance analysis, mass property calculation, interference checking

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Definitions of CAD CAM and CAE cont’CAD, CAM and CAE – cont

CAD – cont’Basic function is to define design geometryComputer aided drafting system or geometric modeling

t i th k l t f CAD tsystem is the key element of CAD systemDesign geometry is the core in the product development cycle and stored in the database by CAD systemcycle and stored in the database by CAD system

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Definitions of CAD CAM and CAE cont’CAD, CAM and CAE – cont

CAMPlan, manage, control of manufacturing operationsCAM module for NC programming is the most popularRobot programming for material handling, welding, assembling, etc.P i f CMMProgramming for CMM

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Definitions of CAD CAM and CAE cont’CAD, CAM and CAE – cont

CAM – cont’Automatic Process planning

Group technologyfFeature recognition or feature based modeling

MRP(Material Requirement Planning)

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Definitions of CAD CAM and CAE cont’CAD, CAM and CAE – cont

CAESimulation of designed productSimulate, refine and optimize the designKinematic program, large-displacement dynamic analysis, etc.

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Definitions of CAD CAM and CAE cont’CAD, CAM and CAE – cont

CAE – cont’FEM is the most typical CAE softwareStress, deformation, heat transfer, fluid flow, magnetic fi ld ti fi ld blfield, continuous field problemMeshing, easy input of BC and loads are required –PreprocessorPreprocessorDisplay of computed result – Postprocessor

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Definitions of CAD CAM and CAE cont’CAD, CAM and CAE – cont

CAE – cont’Need to delete details or reduce the dimension for computational efficiencyOft FEM i bi d ith ti i tiOften FEM is combined with optimizationUsed to detect design flaws at the initial design stage (e.g. CosmosWorks AnsysWorks)CosmosWorks, AnsysWorks)

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