工业缝纫机减振降噪技术的分析

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1、尔华人学硕十学位论文ABSTRACTTheindustrialsewingmachinesarethemajorproductionequipmentsofclothingindustry,andtheirworkingconditionsdeterminethequalityandefficiencyofgarmentsewingtoalargeextent．Withthedevelopmentofscienceandtechnology,thehigh．speediSbecomingtheobviousincreasingtren

2、dofmodemindustrialsewingmachines．Asthesameasothermachinery,themovingcomponentswillabradesharply,followingwiththeescalatinghigh-speedofsewingmachine．Andtheresultingfailureordesignflawwillcausevibrationimpactandnoisepollution．Atpresent，Chinahasbecomethemajormanufacturerof

3、sewingmachines，andthetotaloutputofsewingmachinesaccountsformorethan70％intheworld．TheproblemaboutvibrationandnoiseiSamajorbottleneckofindustrialsewingmachinesforfu【rtherdevelopmentinourcountry．1ftheproblemhasnotbeenresolved，thehigh．speedwillbeSUbjecttosomerestrictions．Th

4、erefore，thestudyonvibrationandnoisereductionofindustrialsewingmachineswillbecomemorenecessary．Theindustrialsewingmachinehasalargenumberofmechanismsandcomplexcomponents．eachofwhichiSrelatedcloselytotheoverallperformanceofthesewingmachine．Firstly,themechanismtransmissions

5、ystemsareintroducedbrieflyinoverlockmachineJK788—4—13HandlockstitchsewingmachineJK．8700inthispaper．Secondly,inthecurrentexperimentalconditions，vibrationandnoisearetestedandanalyzedtoidentifythemainvibrationsource，SOastoprovideabasisforfurtheranalysisofappropriatepansand

6、structureimprovement．Accordingtothesignalanalysisresultsofvibrationandnoise，wecanseethatthemaininfluencingfactorsarethemainshaft(orcalledcrankshaft)inoverlockmachineandtheupper．shaft’Smechanisminlockstitchsewingmachine．TheproblemofvibrationandnoiseinJK788．4．13Hmainlydue

7、stoexcessiveresidualimbalanceofthecrankshaft．Aneffectivebalancemethodofoverlockmachine’ScrankshaftiSpresentedinthispaper．ThePro／ENGINEERiSusedtobuilda3．Dmodularofcrankshaft．thenthebalanceofthemodulariScalculatedandanalyzedwiththissoftwaretechnology．Thecrank-almsneedtore

8、designtheunbalancemassinmulti．planeforbalancecorrection．Thustheresultcanmeetthebalanceprecisionofoverlockmachi