DFMA Paradigms as Applied to the Swingline 747 Stapler Presented by, Team Alpha
Overview Introduction to DFMA. Stapler Properties/Specifications. Material Selection. Manufacturing Processes. Assembly Analysis. Conclusions. Questions.
INTRODUCTION
Product Specifications
DFMA as Applied For Material Selection
MATERIAL SELECTION
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.
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.
Major Material Properties Which Influence Material Selection Young's Modulus and Specific Stiffness Strength Toughness Density Cost
Manufacturing Process
Which Manufacturing Paradigms to Use
Market size Large Market Type Market niches Mass production static Several Yes Product improvement No Concurrent Evolving product family Concurrent Product family
Manufacturing Processes
The Upper Arm Step: 1
The Upper Arm Step: 2
The Upper Arm Step: 3
The Upper Arm Original Design Modified Design
Staple Slide Original Design Modified Design
Upper Staple Guide Original Design Modified Design
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Assembly Process
Handling Times Data Table
CONCLUSIONS DFMA Paradigms Material Selection Manufacturing Assembly Overall Summary
Questions