1. Tutorial: Flange with Equations
Chapter 4

2. Feature 1 – Extruded Circle
INTRODUCTION TO SOLID MODELING USING SOLIDWORKS 2009

3. Feature 2 – Construction Plane
INTRODUCTION TO SOLID MODELING USING SOLIDWORKS 2009

4. Feature 3 – Extruded Boss (Drafted)
INTRODUCTION TO SOLID MODELING USING SOLIDWORKS 2009

5. Feature 4 – Extruded Cut (Drafted)
INTRODUCTION TO SOLID MODELING USING SOLIDWORKS 2009

6. Feature 5 - Fillets
INTRODUCTION TO SOLID MODELING USING SOLIDWORKS 2009

7. Feature 6 - Fillet
Different radius than previous fillets, so added as a separate step
INTRODUCTION TO SOLID MODELING USING SOLIDWORKS 2009

8. Feature 7 - Rib
INTRODUCTION TO SOLID MODELING USING SOLIDWORKS 2009

9. Feature 7 (cont.)
To create this sketch, the silhouettes of the fillets as they intersect the sketch plane are converted into arcs in the sketch
INTRODUCTION TO SOLID MODELING USING SOLIDWORKS 2009

10. Feature 7 (cont.) A line is added that is tangent to both arcs
INTRODUCTION TO SOLID MODELING USING SOLIDWORKS 2009

11. Feature 7 (cont.) Excess portions of the arcs are trimmed away
INTRODUCTION TO SOLID MODELING USING SOLIDWORKS 2009

12. Feature 7 (cont.) Lines are added to close the sketch
INTRODUCTION TO SOLID MODELING USING SOLIDWORKS 2009

13. Feature 8 – Revolved Cut
Because the top of the rib is flat (created by extrusion), it matches the contour of the fillet only at the mid-plane of the rib
The mismatch between the two features needs to be removed
INTRODUCTION TO SOLID MODELING USING SOLIDWORKS 2009

14. Feature 8 (cont.)
Rather than creating a new sketch, the sketch used to create the rib can be re-used and edited
INTRODUCTION TO SOLID MODELING USING SOLIDWORKS 2009

15. Feature 8 (cont.)
The revolved cut allows the rib and fillet to intersect smoothly
INTRODUCTION TO SOLID MODELING USING SOLIDWORKS 2009

16. Feature 8 (cont.)
Note that the shared sketch is indicated by the hand under the sketch icon
INTRODUCTION TO SOLID MODELING USING SOLIDWORKS 2009

17. Feature 9 - Draft
Since the direction of the draft is not the same as the extrusion direction of the rib, the draft is added as a separate feature
INTRODUCTION TO SOLID MODELING USING SOLIDWORKS 2009

18. Feature 10 – Circular Pattern of Ribs
Note that the draft is patterned as well
INTRODUCTION TO SOLID MODELING USING SOLIDWORKS 2009

19. Features 11, 12 – Extruded Cut (Hole) and Circular Pattern
INTRODUCTION TO SOLID MODELING USING SOLIDWORKS 2009

20. Renaming Features
Renaming features will be helpful before adding equations
INTRODUCTION TO SOLID MODELING USING SOLIDWORKS 2009

21. Equation 1 Number of holes = number of ribs
Number of holes is the independent parameter
Number of ribs is the dependent parameter
INTRODUCTION TO SOLID MODELING USING SOLIDWORKS 2009

22. Equation 1 (cont.)
Changing number of ribs causes number of holes to change
Second equation is needed to place holes between ribs
INTRODUCTION TO SOLID MODELING USING SOLIDWORKS 2009

23. Equation 2 Degrees between ribs = 360/(# Ribs)
Angular position of first hole is one-half of angle between ribs = ½*(360/(# Ribs)) = 180/(# Ribs)
INTRODUCTION TO SOLID MODELING USING SOLIDWORKS 2009

24. Equation 2 (cont.)
Changing number of ribs now changes number of holes and places holes between ribs
INTRODUCTION TO SOLID MODELING USING SOLIDWORKS 2009