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

DFMA Paradigms as DFMA Paradigms as Applied to the Applied to the

Swingline 747 StaplerSwingline 747 StaplerPresented by,Presented by,

Team AlphaTeam Alpha

Overview Overview

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

INTRODUCTIONINTRODUCTION

Product SpecificationsProduct Specifications

DFMA as Applied For DFMA as Applied For Material SelectionMaterial Selection

MATERIAL SELECTIONMATERIAL SELECTION

Intuitive Method For Intuitive Method For Material SelectionMaterial 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 intoaccount 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 Major Material Properties Which Properties Which Influence Material Influence Material

SelectionSelection Young's Modulus and Specific Young's Modulus and Specific

StiffnessStiffness StrengthStrength ToughnessToughness Density Density CostCost

Manufacturing Manufacturing ProcessProcess

Which Manufacturing Paradigms to Use

static

Large

Market size

Market Type Mass production

Marketniches

Several

Productimprovement

Yes No

ConcurrentEvolving product family

Concurrent Product family

Manufacturing Processes

The Upper ArmThe Upper ArmStep: 1Step: 1

The Upper Arm

Original Design Modified Design

Staple Slide


Upper Staple Guide


Comparision of Manufacturing Cost

0

5000

10000

15000

20000

25000

Upp

er A

rm

Upp

er S

tapl

eG

uide

Anv

il

Sta

ple

Slid

e

Co

st i

n $

Original Design

Modified Design

Assembly ProcessAssembly Process

Handling Times Data Table

CONCLUSIONSCONCLUSIONS

DFMA ParadigmsDFMA Paradigms Material SelectionMaterial Selection Manufacturing Manufacturing AssemblyAssembly Overall SummaryOverall Summary

QuestionsQuestions

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

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