Transcript DFMA Analysis on the Swingline 747 Stapler

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
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.

Searching material
selection
The designer takes more or less randomly into
account one requirement at the time.
The material is selected among the few materials
the design engineer is familiar with.
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
static
Mass production
Market
niches
Several
Yes
Concurrent
Evolving product
family
Product
improvement
No
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
Comparision of Manufacturing Cost
20000
Original Design
15000
10000
Modified Design
5000
Staple Slide
Anvil
Upper Staple
Guide
0
Upper Arm
Cost in $
25000
Assembly Process
Handling Times Data Table
CONCLUSIONS





DFMA Paradigms
Material Selection
Manufacturing
Assembly
Overall Summary
Questions