cequent group “the development of a tie down ratchet group 2 stephen smith otto gerdeman adam...

Cequent GroupCequent Group“The Development Of A Tie Down “The Development Of A Tie Down RatchetRatchet

Cequent GroupCequent Group“The Development Of A Tie Down “The Development Of A Tie Down RatchetRatchet

Group 2

Stephen Smith

Otto Gerdeman

Adam Schmitz

2

The Team MembersThe Team MembersThe Team MembersThe Team Members

Steve Smith- Group Leader Ensures that all deadlines are met Keeps the team organized and focused

Adam Schmitz- Purchasing Agent Obtains and orders equipment & material Controls/upkeeps the budget

Otto Gerdeman- Technical Liaison Coordinates business with the University machine shop Controls drawings and maintains communication throughout the

manufacturing stages

3

Project BackgroundProject BackgroundProject BackgroundProject Background Market is saturated with

tie-downs nearly identical in appearance and function

– Product differentiation is essential to our client

Our objective is to design and create features that provide this differentiation

– Quality/Price

– Functionality/Ease of Use

– Appearance/Packaging

Adam SchmitzAdam SchmitzAdam SchmitzAdam Schmitz

4

Steps Taken to Identify SolutionSteps Taken to Identify SolutionSteps Taken to Identify SolutionSteps Taken to Identify Solution Re-examined the objective through a marketer’s

perspective

Appearance and packaging were first characteristics observed

Buying tie-downs is a low involvement purchase

The perceived value of the customer is not always the actual value

5

House of QualityHouse of QualityHouse of QualityHouse of Quality

6

Strap Storage DesignStrap Storage DesignStrap Storage DesignStrap Storage Design

Final Design:Final Design:Final Design:Final Design:

7

Crank-WinderCrank-WinderCrank-WinderCrank-Winder

Otto GerdemanOtto GerdemanOtto GerdemanOtto Gerdeman

8

Crank-WinderCrank-WinderCrank-WinderCrank-Winder Normal Operating Force

How to Determine Sudden Spike in Forces

Two Options

– Experimentally

• Use Force Measuring Equipment

– Theoretically

• Mass of arm moving at a speed

To Many Assumption with Theoretical Calculation

Otto GerdemanOtto GerdemanOtto GerdemanOtto Gerdeman

9

Crank-Winder ExperimentCrank-Winder ExperimentCrank-Winder ExperimentCrank-Winder Experiment

Otto GerdemanOtto GerdemanOtto GerdemanOtto Gerdeman

10

Crank-Winder ExperimentCrank-Winder ExperimentCrank-Winder ExperimentCrank-Winder ExperimentExperimental Data:Experimental Data:

Calculated Forces at CrankCalculated Forces at Crank

Normal:Normal:

Worst Case:Worst Case:

Otto GerdemanOtto GerdemanOtto GerdemanOtto Gerdeman

11

Crank-Winder FEACrank-Winder FEACrank-Winder FEACrank-Winder FEA

•Factor of Safety: 3.49• Nylon 6/6 was used as material

Otto GerdemanOtto GerdemanOtto GerdemanOtto Gerdeman

12

Snaps for Hook StorageSnaps for Hook StorageSnaps for Hook StorageSnaps for Hook Storage Holds hooks in place

– Prevents straps from unwinding in storage

Simple and easy to use

Cheap to Manufacture

Fatigue Analysis

– Subject to repeated loading and unloading

13

Fatigue Analysis for Hook SnapsFatigue Analysis for Hook SnapsFatigue Analysis for Hook SnapsFatigue Analysis for Hook SnapsModeled as a straight beam

Givens:

Unknowns:

δ

14

Stress Amplitude vs. Cycles to Failure Stress Amplitude vs. Cycles to Failure Stress Amplitude vs. Cycles to Failure Stress Amplitude vs. Cycles to Failure

Approx. 0.70ksi

15

Final DimensionsD=0.40 ind=0.32 inL=0.40 inb=0.25 inh=0.04 in

Fatigue Analysis for Hook SnapsFatigue Analysis for Hook Snaps

16

Storage Compartments/PocketsStorage Compartments/PocketsStorage Compartments/PocketsStorage Compartments/Pockets Houses straps while

not in use

Dimensions acquired from crude prototypes

Tight fit increases ease of winding

17

Overall Design - AppearanceOverall Design - AppearanceOverall Design - AppearanceOverall Design - Appearance Cequent desired a more modern look with

smoother edges

Must compromise size and functionality

18

Overall Design - SizeOverall Design - SizeOverall Design - SizeOverall Design - Size Size is an issue to major retailers like Wal-Mart

– Major customer to Cequent

Overall size has increased by about 45%

– 165 in^3 to 240 in^3

– Increase depth at pockets

– Smoother edges and curves

19

BudgetBudgetBudgetBudget

Otto GerdemanOtto GerdemanOtto GerdemanOtto Gerdeman

Items purchased: Quantity: Price:

Chalk box 2 $3.97

Dowel Rods 5 $0.91

Hot glue gun 1 $9.95

Total: $22.94

Item to be purchased:

Labor @ $65/hour 4 $260

Nylon shaft 5 ft. $3.55

Rapid Prototype 1 $200

Total: $463.55

20

TimelineTimelineTimelineTimeline

Week

1

Week

2

Week

3

Week

4

Week

5

Week

6

Week

7

Week

8

Week

9

Week

10

Week

11

Week

12

Week

13

Week

14

Week

15

Week

16

Meet Group & Assign RolesMeet/Talk with ClientProject ResearchBrainstormingProposal (Presentation & Report)Design Obtain/Order EquipmentExperimentation/VerificationMidterm (Presentation & Report)Finalize Design CharacteristicsWeb Page Design Final (Presentation & Report)

CompletedRemaining

Otto GerdemanOtto GerdemanOtto GerdemanOtto Gerdeman

21

SummarySummarySummarySummary Tasks Completed

– Rough Prototypes Built

– Stress Analysis

– Drawings Finalized and Approved

Tasks Remaining

– Finish Exact Prototype

• Test

– Create Labeling

• Marketing Research

Otto GerdemanOtto GerdemanOtto GerdemanOtto Gerdeman

22

Project DeliverablesProject DeliverablesProject DeliverablesProject Deliverables Provide a new and fresh perspective on Cequent’s

products and the overall tie-down market

Produce a working replica of the redesigned packaging

– A wind-up and storage feature that improves functionality and adds value to consumer

– Create a more sleek and modern look

– Calculations that prove reliability, safety, and functionality

New packaging label that is informative and appealing

– Using Marketing concepts

23

Questions?Questions?Questions?Questions?