1. Submitted By
Mohan Patwa
Submitted To
Mr. Rajendra Yadav
Mrs. Tapati Yadav

2. Contents:-
•Engineering Drawing
•Design Process
•Computer Aided Design Procedure
•Geometric Modeling
•2D Model & 3D Model
•Difference Between 2-D& 3-D Model
•3-D Models
•Comparison Of Various Modeling Technique
•Geometric Modeling Example With Procedure
•Analysis And Design Review
•Analysis Results
•Model Drafting Procedure

3. Engineering Drawing
A graphical language that communicates ideas and information from one mind
to another.

4. Design Process
• It is an innovative and iterative process.
• It is a decision making process.
• It is a communication intensive activity in which both words and pictures are used.
• Designs are subjected to problem solving constraints.
Specific
Information
Design Operation Outcome
General
Information
Evaluation
Feedback Loop
NO YES
Go to
the
Next
Step

5. Computer Aided Design Procedure
Recognition of need
Definition of problem
Synthesis
Analyze and Optimization
Evaluation and
Presentation
Geometric Modeling
Engineering & Analysis
Design review &
Evaluation
Automated Drafting

6. Geometric Modeling
Geometric modeling is a branch of applied mathematics and computational
geometry that studies methods and algorithms for the mathematical description
of shapes.

7. Geometric Modeling
2D Modeling 3D Modeling
Line Model Surface Model Solid Model

8. 2D Model & 3D Model
2D Model 3D Model

9. Difference Between 2-D & 3-D Model
Description 2-D Model 3-D Model
Use Simple 2D Objects Complicated 3D Objects
Co-ordinate
System
WCB UCS
Views Generation Difficult Easy
End Lines
Representation
(X,Y) (X,Y,Z)
Curve Edges
Representation
Circle, Ellipse, Splines Etc. Suitably Spaced Generators
Complex Object
Representation
Required Additional Views
And Sectional Views
Complex Component Can Be
Interpreted Correctly

10. 3-D Models
WIREFRAME MODEL SURFACE MODEL SOLID MODEL

11. Comparison Of Various Modeling Technique
Wireframe Model Surface Model Solid Model
Automatic View
Generation
Not Possible Not Possible Possible
Elimination Of Hidden
Lines
Manually Guided May Be Possible Possible
Cross Sectioning Manually Guided Manually Guided Possible Even Automated
Crosshatching Is Possible
Analysis Function Difficult Or Not
Possible
Difficult Or Not
Possible
Possible
NC Application Difficult Or Not
Possible
Automatic Possible
Interpretation Ambiguous Relatively Easy Clear

12. Geometric Modeling Example With Procedure

13. Analysis And Design Review

14. Analysis Results

15. Model Drafting Procedure