process improvement for convoluted ptfe hose thermal …2016 process improvement for convoluted ptfe...

SENIORDESIGN

Spring

2016 ProcessImprovementforConvolutedPTFEHoseThermalExpansion

PROJECTSUMMARY

TECHNICALAPPROACH

ThermalExpansionSolutionswastaskedtoimproveupontheexistingprocessthatParkerStratoflex utilizestothermallyexpandconvolutedPTFEhosesforaerospaceapplications.Keyrequirementsfortheprojectwhereimprovedsafety,reducedproductscrap,increasedprocessrepeatability,andreducedoverallprocesstime.

Anewthermalexpanderwasdesignedtoaddresstheserequirements.Thenewdesignconsistsoffourmainareas:thehose-clampingmechanism,therailsystemwithsupportframe,mandrelswithmandrelcompartments,andtheslidingtrapdoor.

PhaseI• Investigatedcurrentthermalexpanderdesignandprocess.• Developedcriteriatoaddresskeyclientneedsforimprovedsafety,

reducedproductscrapduetoPTFEfolding,increasedprocessrepeatability,andreducedprocesstimeperhose.

• Developedpotentialsolutionsforimprovementtokeyareasofthethermalexpanderandcombineddown-selecteditemsintofinalconceptualdesign.

PhaseII• Fabricatedtestmandrelstodeterminebestmandrelshapetoexpand

hoses.• Developeddetaileddesignwithsuggestedimprovementsfromclient.• Establishedproceduresforassembly,operation,andmaintenanceof

newthermalexpanderdesign.• Presentedfinalizeddetaileddesignwithrecommendationsforfurther

developmentandautomation.

RonaldoMarionTeamLead

RyanSerioDesignLead

JoaquinFelixCADModeler

MarcusBrewerThermalAnalysis

MarcSellersMaterialsResearch

ThermalExpansionSolutions

Figure1:Currentthermalexpanderdesign.

Figure2:ExpanderPTFEHosewithFoldingDefect.

Figure2:NewThermalExpanderDesign.Trapdoor,electricbox,andventilationequipmentarenotshown.