外文翻译--单螺杆加工机床的布局和结构.doc

Single-screwMachineToolLayoutandStructureAbstractMachineisanationalsymbolofhighandlowlevelofmanufacturingindustry,thecoreisaCNCsystem.Wearecurrentlynotsaythatthesystemisthequalityofdomestic-madeCNCmachinetoolsalittlebetter,theuseofhigh-precisionballscrews,bearingsareimported,mainlytobuyinJapan,ourhomegrownballscrew,bearingsinprecision,thereareproblemsinlife.Thispaperdescribesfourareasfromtheexistingsingle-screwmachinelayoutandstructure,andputouttheadvantagesanddisadvantagesofthelist,becauseofthecompressorplantsingle-screwmachinetoolsandmachinetoolexternalSecurityinformation,theaboveintroductionthereisinevitablyone-sidedandwrong,andarethereforesingle-screwcompressorfortheproductionofreferenceworks.KeyWordsMachineSpindleBearingToolMachineisanationalsymbolofhighandlowlevelofmanufacturingindustry,thecoreisaCNCsystem.Wearecurrentlynotsaythatthesystemisthequalityofdomestic-madeCNCmachinetoolsalittlebetter,theuseofhigh-precisionballscrews,bearingsareimported,mainlytobuyinJapan,ourhomegrownballscrew,bearingsinprecision,thereareproblemsinlife.Currentlythemajormachinetoolplant,purchased100%ofNCsystem,themanufacturersgenerallybuyaJapaneseFanuc,Mitsubishisystems,accountingformorethan80%,butalsoGermanysSiemenssystem,butrelativelysmall.WhyisGermanysSiemenssystemusedbysmall?Early,theGermansystemisnotabletofitourpowergrid.Ourpowergridstabilityisnotenough,Siemenselectronicservosystem,themoduleeasytoburnout.Japanisdifferent,andtheirsystemisnotabadburn.Recently,anumberofSiemenssystemimprovements,priceisstillslightlyhigher.GermanyisverygreatimportancetoChina,soChineseoftheirsystemonlyrecently,unlikeJapan,thereareChinese-basedversionofthelongago.Theyareintroducedinthelate90sJapanesetechnologydevelopment.SouthKoreashouldbealittlebetter.Ithasitsownmanufacturing,hascommercializedtheNCsystem,butimportsofmachinetoolsinChinainresponsetoourrequirements,butalsoreplacedtheJapanesesystem.Wetrustedtheirsystems.SouthKoreanCNCmachinetoolsaremainlytwo:DaewooandHyundai.DaewoocurrentlyhasajointventureinChina.However,theirpoorqualitymachinetools,lifeisshort,thecurrentbadinfluenceinthemainland.Infact,theywerebetterthanwemadealittle.However,ourownpoor,wecantolerate,TaiwansmachineispurchasedwithU.S.dollars,withthebad,andthatthefirelarger.Taiwansmainplant,severaltoolshavebeenintendedtomovetheirfactoriestothemainland,mostoftheminShanghai.Theseplantscurrentlyinthedomesticcompetition,butalsothenameofthebannermade.Onthedomesticadvancednumericalcontrolmachinetools,itsmainprofitistakenawaybyforeigners.Recently,asChinaseconomicdevelopment,alsocausedsomeofthemajormachinetoolmanufacturersintheworldsattentionin2000,ChinasetupajointventureofNCmachinetoolplant,saidproductionlevelisveryhigh,knownas"intelligent,network-based"factory,andtheworldsimultaneously.Alsothisyear,amajorJapaneseOkumaMachineToolPlantinBeijing,setupanannualoutputof1000setsCNCmachinetoolscanbeaholdingcompanyofawell-knownGermancompaniesaresettingupaShanghaifactory.Atpresent,thecountrieshavedevelopedanumberofpoliciestoencouragepeopletousedomesticCNCmachinetool,eachmanufactureristryingtocatchup.the80%areimported,domesticmachinetoolstomeetneeds.Withinthenextfiveyears,thistrendwillnotchange.However,intermsofthepresentdomesticneeds,ChinasCNCmachinetoolsnowareabletomeetthemediumandlowproductorders.First,introducethelayoutofmachinetoolsThefirstis:machinetoolrotarytoolspindlecenterandthecenterdistanceforthefixedMachinetoolrotarytoolspindlecenterandthecenterdistanceforthefixed,cannotadjustthecenterdistance.Processingofseveralofthescrewdiameteronthecenterdistancerequiredseveraldifferentspecificationsofthemachine.Advantages:simplestructureofthemachine.Disadvantage:eachmachinecanonlyprocessaspecificationofthescrew,whenthemarketonacertainspecificationrequirementswhenthescrewcompressor,resultinginamachine,othermachineidle.Thesecond:themachinetoolspindleboxforrotarySpindleboxthatthemachinecanturnonamachineattheabove-mentionedarticleontheuseoftheimprovements,withthefirststructureofamachinetoolisbasicallythesame.Advantages:thestructureofmachinetooleasytoadapttoavarietyofspecificationsoftheprocessingscrew.Onedisadvantage:aftertherotatingspindleboxandthetoolspindleturningcenterlinedistancebetweenthecenterlineofaccuratemeasurementdifficult.Thethird:themachinetoolspindleboxforhorizontalmobileBoxatthebottomofthespindleandthebasethereisarrangedbetweentherectangularslidingrail,spindleboxperpendiculartothedirectionofmovementofspindlecenterlineandperpendiculartothecenterlineofthetoolrotation.Throughthepowerofthespindleboxshafttothebaseofthetoolfeedmechanism.Screwdiameter,accordingtothesizeoftheprocessingintheprocessingofthepreviousroundbyhandtothebodyputintothescrewspindleboxmovedtotheappropriatelocation,andthenscrewthespindleboxonafixedbase.Horizontalspindleboxcanbeusedasamobilemachinecanprocessdiameter95385mmanykindbetweenthescrewspecifications.95385mmprocessingbecauseofthediameterofthescrew,causingthefrontsurfaceandthetoolspindlerotationthedistancebetweenthecenterlineofthemarginistoolarge,theactualapplicationinthedesignspecificationsofthemachineintotwo,a95205mmmachinescrewdiameterAnother180385mmmachinescrewdiameter.Advantages:avarietyoftoolstoadapttothespecificationsoftheprocessingscrew,eachscrewspecificationsneednotbeprovidedwiththeappropriatemachinetools.Disadvantage:thestructureofmachinetoolsandmachinetoolassemblyofthetwokindsofmorecomplexmachinetools,machinetoolsthanthecostoftwokindsofmachinetoolsbeforethehigh.Second,introducethestructureofmachinetoolspindleThelevelofmachinetoolspindleboxonthemainaxisandthebaseoftheverticalaxisdeterminesthedegreeofprecisionwastheprecisionscrewmachining,atthesametimescrewcompressorataspeedofthousandsofhigh-speedrotaryswitch,theaccuracyofthescrewwillbelesssothatthecompressorhaveafever,vibration,lowefficiency,suchaswearandtearsituationquickly.