DFMA Paradigms as Applied to the Swingline 747 Stapler

1. DFMA Paradigms as Applied to the Swingline 747 Stapler Presented by, Team Alpha

2. Overview • Introduction to DFMA. • Stapler Properties/Specifications. • Material Selection. • Manufacturing Processes. • Assembly Analysis. • Conclusions. • Questions.

3. INTRODUCTION

4. Product Specifications

5. DFMA as Applied For Material Selection

6. MATERIAL SELECTION

7. Intuitive Method For Material Selection • First best material • Same Material For Same Part • Problem solving material selection • Searching material selection The material is selected among the few materials the design engineer is familiar with. A property has given rise to problems. A new material is chosen in the same group of material with a higher value of the property. The designer takes more or less randomly into account one requirement at the time.

8. Drawbacks with Intuitive Methods • Important requirements have often given rise to failures in operation. • First solution at hand is taken which is not very likely to be good solution. • The solution is typically far from the optimum giving the part poor competitiveness.

9. Major Material Properties Which Influence Material Selection • Young's Modulus and Specific Stiffness • Strength • Toughness • Density • Cost

11. Manufacturing Process

12. Which Manufacturing Paradigms to Use

13. Market size Large Market Type Market niches Mass production static Several Yes Product improvement No Concurrent Evolving product family Concurrent Product family

14. Manufacturing Processes

15. The Upper ArmStep: 1

16. The Upper ArmStep: 2

17. The Upper ArmStep: 3

18. The Upper Arm Original Design Modified Design

19. Staple Slide Original Design Modified Design

20. Upper Staple Guide Original Design Modified Design

22. Assembly Process

23. Handling Times Data Table

24. CONCLUSIONS • DFMA Paradigms • Material Selection • Manufacturing • Assembly • Overall Summary

25. Questions