9. Solid Modeling with computer aided manufacturing

9. Solid Modeling with computer aided manufacturing

1. Industrial Engineering
UPNV Jawa Timur
Solid Modeling
Kode Mata Kuliah : TI141147
Jumlah Kredit : 2 SKS

2. Solid Modeling
Evolution of CAD Technology
Surface model
Wire-frame model
Solid model
Drawing

3. Solid Modeling
Manual drafting (1970)
•2D representations used to represent 3D objects
•multi-view drawings
•pictorials
•Standards and conventions developed so that 3D object could be built from drawings
•Drawings created manually or using 2D CAD
•Difficult to visualize, error-prone, time-consuming

4. Solid Modeling
Wire frame Model (1980)
•Geometric entities are lines and curves in 3D
•Volume or surfaces of object not defined
•Easy to store and display
•Hard to interpret - ambiguous

5. Solid Modeling
Surface Model (1985)
•Models 2D surfaces in 3D space
•All points on surface are defined
–Useful for machining, visualization, etc.
•Surfaces have no thickness, objects have no volume or solid properties
•Surfaces may be open

6. Solid Modeling
Solid Model
•Complete and unambiguous
•Solid - models have volume, and mass properties
•Feature based - geometry built up by adding and subtracting features
•Parametric - geometry can be modified by changing dimensions

7. Solid Modeling
Parametric and Feature-based Solid Model
SOLID GEOMETRY
BASE FEATURE
(“POSITIVE” SOLID)
CHILD OF BASE FEATURE
(“NEGATIVE” SOLID)
PARAMETER

8. Solid Modeling
Solid, parametric, feature-based Modeling Software
High-end (more powerful)
–NX (UGS)
–Catia (Dassault Systémes)
–Pro/Engineer (Parametric Technologies Corp.)
Mid-Range (easier to use)
–Solid Edge (UGS)
–Inventor (Autodesk)
–SolidWorks (SolidWorks Corp.)

9. Solid Modeling
Feature-Based Solid Modeling
•Parts modeled by adding features to a base part
•Features are represent “operations” such as creating holes, ribs, fillets, chamfers, slots, pockets, etc.
•Material can be added or subtracted
•Features can be created by extrusion, sweeping, revolving, etc.
•Features history trees, shown the features and their order in a graphical tree view

10. Solid Edge
Feature Pathfinder

11. Pro/E Wildfire
Model Tree

12. SolidWorks
Feature Manager
Design Tree

13. See you in the next meeting