introduction to cam (computer aided manufacturing)ocw.snu.ac.kr/sites/default/files/note/203.pdf ·...
TRANSCRIPT
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Introduction toCAM (Computer Aided Manufacturing)
Prof. Sung-Hoon Ahn
September 6, 2006
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CAD/CAM integration
Boeing 787Global collaboration
US design, manufactured around the world
Higher efficiency –composite materials (40~55% weight)
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Goal: Shared EngineeringDesign A
Horizontal Concurrent Engineering
Vert
ical
Co n
cur r
ent E
ngin
e er in
g
Analysis
Manufacturing
Marketing
Geometry
Simulationresults Database
Server
KnowledgeBase
Design B
Geometry
Simulationresults
CAD GeometryCAD Geometry
Suppliers & CustomersB2B B2C
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Issues to be covered in CAM
NC (Numerical Control) ProgrammingCAM SoftwareRapid PrototypeVR/ARReverse Engineering
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Example of CAD/CAM integration
ScanningSurface mergingNC code generationMachining Color mapping Network-based communication … …
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NC codeLow level language for machine controlApplicable to many types of manufacturing hardwareExample:
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NC (Numerical Control) Programming
(a) Core (b) Cavity
Example of NC programming model
Source: Virtual GibbsSource: Virtual Gibbs
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CAD to CAM Interface
3D CAD 3D CAM
STL, STEP,IGES
Source: Virtual GibbsSource: Virtual Gibbs
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Injection Molding
Schematic of the Morgan G-100T Press – not for mass production
(fixed)
(Moving)
Compression(fixed)
Injection
Source: Morgan corp.
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Injection Molding
Molded tensile specimens
Two-part mold for injection molding
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Laser Machining
3-axis stage for Laser Machining
CO2 Laser
Micro Stage
Laser machined LGP
Cross section of grooves (Ⅹ100)
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Laser cutting
2D profile cutUseful for your class project
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What is Manufacturability?
Do you know how to make these parts?
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Rapid Prototyping (RP) - concept
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NASA: Fabrication in Space
FDM1600 test at zero gravityJohnson Space Center & Marshall Space Flight Center, 2000
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Design for Manufacturing (DFM)
More important questionsHow much cost?How long to take?
These issues are influenced by:Manufacturing processAvailability of machinesMaterial Batch size (how many parts)etc.
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RP Parts
Color parts fabricated by rapid prototyping
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Micro RP for nano composite
Hybrid Rapid Prototype
Micro stage for hybrid RP
Deposition processMicro end-mill for
machining
Hybrid machining process
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Bio-RP part
Examples of micro RP – stapes made of hydroxyapatite
Source: Wikipedia
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Augmented Reality/Virtual Reality
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AR/VR
Movie - Minority report (2002) < Magic Book >
< AR Desktop >
Source: ARToolkit
Source: ARToolkit
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Example of reverse engineering
Reverse Engineering
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Copying sculpture
Replica
Source: Materialise
Source: Materialise
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Medical applications
Reverse Engineering
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‘X’ can represent:Assembly (DFA)Manufacturing (DFM)Quality (DFQ)Environment (DFE)
Design For X (DFX)
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Product Data Management (PDM)
Source: Wikipedia
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Web-based Manufacturing Systems
Pattern of LGP (Light Guide Panel) Service
NC code / dwg file
Tier 2Servers
LGP Server
WWW Server
Laser marking
CO2 Laser
Fabrication
LGP pattern
Tier 1
Design Tool
Generation Tool
WebBrowser
ClientInternet
Prototype
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Web-based Manufacturing Systems
MIMS (MIcro Machining Service)UI – Web browser
NC codes and fabricated part I
NC codes and fabricated part II
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The Google Guys
Started at Stanford (1996)Commercialization: search technology for Web pages, facts, quotes, etc. (1998)Sales $ 8 billion (2005)
Google Earthhttp://earth.google.com
Larry Page
Sergey
Brin
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Term projects from 2005
Budget for each team: ₩150,000Processes to use
MachiningInjection moldingRapid PrototypingLaser cutting
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Possible subject areas of project
Product development – new/innovative product from concept to partSoftware using CAD/CAM technology
Web-basedAPI of CAD/CAM systemGeometric modeling tool
Proposal from students (group)