Introduction to CAD/CAM/CAE

CAD Lab.

Introduction CAD(Computer Aided Design) CAM(Computer Aided

Manufacturing) CAE(Computer Aided Engineering)

Memory capacity, processing speed,Interactive graphics

Quality, Cost, Delivery

Product cycleDesignNeed

DesignSpesifications

Feasibility S tudy withCollecting Design Inform ation

DesignDocum entation

DesignEvaluation

DesignOptim ization

DesignAnalysis

AnalysisModel

DesignConceptuali-

zation

ProcessP lanning

ProductionP lanning

Design andProcurem ent of

New Tools

Order Material

NC, CNC, DNCProgram m ing

ProducttionQ ualityC ontro l

Packaging Shipp ing

M arketing

MANUFACTURING PROCESS

Analysis

SynthesisDESIGN PROCESS

CAD + CAE

CAM

Solid model of example part

Finite element analysis model of example part

Finite element meshes

Load condition: case 1

Load condition: case 2

Stress distribution on example part

Result for case1

Result for case2

Fill time distribution for example part

Physical prototype of example part

Part drawing of example part

Core, cavity, and side cores for example part

Completely designed mold base

NC tool paths to machine mold

Product cycle 에서 컴퓨터의 적용 신속한 Design concept 의 제공

Computer aided drafting system Geometric modeling system Parametric modeling

Product cycle 에서 컴퓨터의 적용 – cont’

Product cycle 에서 컴퓨터의 적용 – cont’ 강력한 해석기능의 제공

Stress analysis, interference checking Kinematic analysis, etc. Analysis model with proper abstraction Interactive generation of analysis model

Product cycle 에서 컴퓨터의 적용 – cont’ Design evaluation 을 위한 prototype

제공 Rapid Prototyping (RP) Virtual Prototyping (VP)

RP - Stereolithography Process

Cured Plastic

XY Scanning Ultraviolet Laser Beam

Photo-curableResin(Liquid)

Top of the Liquid

Elevator

Vat

Platform

Virtual Prototyping of Engine

Virtual Prototype of Equipment

Construction Equipment from John Deere (Division Inc.)

Product cycle 에서 컴퓨터의 적용 – cont’ 편리한 design documentation 기능 제공

Computer aided drafting system Automatic drafting program

Product cycle 에서 컴퓨터의 적용 – cont’

Product cycle 에서 컴퓨터의 적용 – cont’ Process plan 의 자동 생성 NC program 의 자동 생성 Robot, CMM 구동 프로그램의 자동 생성

Definitions of CAD, CAM and CAE CAD

Creation, modification, analysis, optimization

Computer graphics + design 을 위한 application program

Tolerance analysis, mass property calculation

Finite element modeling and analysis

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

Design geometry 를 정의하는 것이 기본기능

Design geometry 가 product development cycle 의 핵심

Computer aided drafting system, geometric modeling system 이 CAD system 의 핵심

Definitions of CAD, CAM and CAE – cont’ CAM

Plan, manage, control of manufacturing operations

NC 가 가장 활용도가 큼 Robot programming for material

handling, welding, assembling, etc.

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

Process planning 의 자동화 Group technology Feature recognition or feature based

modeling MRP(Material Requirement Planning)

Definitions of CAD, CAM and CAE – cont’ CAE

Analyze CAD geometry Simulate, refine and optimize the design Kinematic program, large-displacement dyn

amic analysis, etc.

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

FEM 이 가장 대표적인 CAE software Stress, deformation, heat transfer,

fluid flow, magnetic field, continuous field problem

Abstract model 과 mesh 필요

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

Abstract model 은 detail 을 없애거나 dimension 을 낮춤

Mesh 생성은 preprocessor 에 의해 계산 결과는 postprocessor 에 의해 Optimization 과 FEM 의 결합 초기에 설계 결함 확인