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1、PlasticGearsProfileoptimisationKISSsoftPlasticgearprofileoptimisationWewilllookatthefollowingprofilemodificationsTipandrootreliefProfilecrowning/barelling(centricandeccentric)PressureanglemodificationWewilllearnaboutafunctionhowtofindthebestpossiblecombinationofprof
2、ilemodificationsNotethatyoushouldapplyatiproundingbeforeyouusethebelowfunctionbecausethetiproundingaffectsthetipformdiameterdFa!1)ProfilemodificationsProfilemodifications BasicconsiderationsThebasictaskisFindasuitableprofilemodificationThatgivesgoodresultsintermsofe
3、.g.Lowpeak-to-peaktransmissionerrorLowwearrateLowcontactstress…UndertheconditionthatitworksfordifferentloadlevelsAndthenexporttheresultinggeometryfortoolingThekeydifficultyis:ONEmodificationshouldbesuitableforMANYloadlevels.Forexample,amodificationthatgiveslowvibrat
4、ionataparticularloadlevelbuthighvibrationatanotherisNOTsuitable.Profilemodifications DefinitionsinKISSsoftThedesignofgearmodifications(forplasticgears,mostlyprofilemodifications)isoneofthekeytasksforhighperformancegears,wherehighperformancemaybedefinedas,amaximizedt
5、orquecapacity,minimizedvibrationlevelorlowestwearrisk.Gearmodifications,orthegearmicrogeometry,areassessedinthetoothcontactanalysisTCAwherethetruegeargeometry,consideringbothgearmacroandmicrogeometryandgearmisalignment.Theprofilemodificationmaybeconsideredasatoothfo
6、rmmodificationandarediscussedhere.Thetoothcontactanalysisisnotdiscussedhere.FortolerancebandsrefertoANSI/AGMA2000-A88,ISOTR10064-1.ForprofilemodificationsinKISSsoft,ISO21771isusedmostly.Profilemodifications TipandrootreliefTipandrootreliefCαaCαf:Tipreliefmaybeaddedt
7、ogear1orgear2orbothinamesh.Ifyouwanttoconsiderthemodificationonbothgears,usetwolines.Selectthetypeoftiprelieffromthelist?Typeofmodification“In?Value“,enterthevalueforCαaandCαfinum?Factor1“definesthelengthoftherelief/it‘sstartposition,asamultipleofthemodule,measuredf
8、rompointAandErespectivelyUsingtheflag?Status“,youmayuse/notusethemodificationinaparticularcalculation.Profilemodifications Differenttypeso
