cad cam cnc lesson1
TRANSCRIPT
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S tit tng:60tit (14tun,1tun:4tit). S tit l thuyt:45tit (12tun)
S tit thc hnh:15tit (3 tun).
S tit bi tp ln:15tit
Mn hc trc:khng c
Mn hc songhnh:khng c.
Mc tiu mn hc:cung cp cho sinh vin kin thc,phngphp lun v CAD/CAMm hnh ha hnh hc, ha my tnh,thit knh my tnh v cc ng dng,cng ngh,lp trnh,v
my cng c CNC,h thng sn sut linh hot (FMS),v h thngsn xut tch hp nh my tnh (CIM).
Hnh thc kim tra:50%kim tra,50%thi cui k.
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1. on Th MinhTrinh:Cng ngh CAD/CAM.NXBKhoa Hc K Thut,1998
2.L Trung Thc:CAD/CAM Thit kv snxut nh my tnh,2000
3. on Th MinhTrinh,Nguyn Ngc Tm:Cng ngh Lp trnh gia cng iu khin s,NXBKhoa Hc K Thut,2002.
4.PNRao:CAD/CAMPrinciplesandApplications.McGrawHill,2002.
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1. Hiu bit v Cng ngh chto my,bit chn dngc ct v xc nh ch gia cng
2. Bit s dng my tnh
3. Hiu bit v v k thut
4. Phi tm hiu t nht mt phn mm CAD/CAM(V d:
Pro/ENGINEER,Cimatron,SolidWorksSolidCAM,
Mastercam,)
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Bi
1 M u v CAD/CAM
2 Phn cng v CAD/CAM
3 ha my tnh
4 M hnh ha hnh hc
5 H thng CAD6 M u v CNC
7 Cng ngh v lp trnh phay CNC
8 Cng ngh v lp trnh tin CNC
9 Vai tr ca cc h thng thng tin
10 FMSv CIM
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CAD/CAM/CNC
By Ton, Thien-Phuong
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nh ngha CAD/CAM/CNC
Lch s CAD/CAM/CNC
Chuk sn phm
Cng c CADh tr trong qu trnh thit k
Cng c CAD/CAMh tr trong qu trnh thit kv chto.
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NHNGHACAD/CAM/CNC
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CAD =ComputerAidedDesign
CAM=ComputerAidedManufacturing
CNC=ComputerNumericalControl
y l k thut cp n vic s dng computer thc hin vic thit kv chto.
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CAD c xc nh nh l vic s dng h thng mytnh thc hin nhng chc nng trong qu trnh thitk.
CAM l s dng h thng my tnh lp k hoch,qun l, iu khin nhng hot ng ca qu trnh snxut thng qua c giao tip trc tip hay gin tip vimy tnh vi nhng ngun khc.
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Computer ProcessProcess data
Control signals
Computer ProcessProcess data
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LCHS CAD/CAM/CNC
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1
N C
1960950 1970 1980 1990
C N C
F MSS
C A D
C A D / C A M
C I M
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Kho at o chnh xac gia cong chu yeu do sai so cua mau dungcho qua trnh chep hnh c phong ai.
De lam sai do nham lan hay hieu sai.
Nang suat thap do mau c thiet ke theo phng phap thucong va qui trnh c thc hien tuan t (Tao mau san pham Lap ban ve chi tiet tao mau chep hnh Gia cong chep
hnh).
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(CAM)
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Thiet ke cac san pham co hnh dang phc tap trong khong gian3D.
Lien ket vi cac Moun khac e thc hien qua trnh tnh toanphan tch ky thuat, mo phong gia cong th e kp thi sa chatrc khi tien hanh qua trnh san xuat.
Bien dch cac ng chay dao chnh xac dung cho cong nghegia cong tren cac may CNC va truyen chng trnh gia cong
qua cac may gia cong CNC.
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The Manufacturing Process
The Design Process
Synthesis
Analysis The CAD Process
The CAM Process
Designneeds
Design definitions,specifications, and
requirements
Collectingrelevant designinformation andfeasibility study
Designconceptualization
Designmodeling and
simulation
Designanalysis
Designoptimization
Designevaluation
Designdocumentation and
communication
Processplanning
Ordermaterials
Design andprocurement
of new tools
Productionplanning
NC, CNC, DNCprogramming
Production Qualitycontrol Packaging
Marketing
Shipping
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Design phase Required CAD tools
Design conceptualization Geometric modeling techniques;
Graphics aids; manipulations; and
visualization
Design modeling and simulation Same as above; animation; assemblies;
special modeling packages.
Design analysis Analysis packages; customizedprograms and packages.
Design optimization Customized applications; structural
optimization.
Design evaluation Dimensioning; tolerances; BOM; NC.
Design communication and
documentation
Drafting and detailing
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Delineation ofgeometric model
Definitiontranslator
Geometric model
Design andAnalysis algorithms
Drafting anddetailing
Documentation
To CAM Process
Interfacealgorithms
Design changes
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Manufacturing phase Required CAM tools
Process planning CAPP techniques; cost
analysis; material and
tooling specification.
Part programming NC programming
Inspection CAQ; and Inspection
software
Assembly Robotics simulation and
programming
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Geometric model
Interfacealgorithms
Process planning
Inspection
Assembly
Packaging
To shipping and marketing
NC programs
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Computergraphicsconcepts
Design tools
Geometricmodeling
CADtools
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Mfg tools
Networking
Design tools
Geometricmodeling
Computergraphicsconcepts
CAD/CAMtools
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Geometric modelingof conceptual design
Is design evaluationPossible with
availableStandard software?
Design testingAnd evaluation
Is final designApplicable?
Drafting
Documentation
Processplanning
Are theremanufacturingdiscrepancies inCAD databases?
NCprogramming
Machining
Inspection
Assembly
Developcustomized
programs andpackages
No
Yes
Yes
Yes
Geometric modeling and graphics package
Designpackage
Programmingpackage
No
No
CAPP package
NCpackage
InspectionAnd Robotics
package
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CAD
CAM
CNC
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Greater flexibility.
Reduced lead times.
Reduced inventories.
Increased Productivity.
Improved customer service.
Improved quality.
Improved communications withsuppliers.
Better product design.
Greater manufacturingcontrol.
Supported integration.
Reduced costs.
Increased utilization.
Reduction of machine tools.
Less floor space.
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