外文翻译--曲柄滑块机构及其特性研究.doc

1Introduction:Withindustrialdevelopment,differentspecificationsofthecrankslidermechanismareappliedtomoremachinery.Itisinthemachinerymanufacturingindustryandotherindustrialproductionofmoreandmoresignificantrole,suchasinautomobile,agriculturalmachinery,electronics,medicalequipment,defense,aerospaceandindustrialsectorsandotherdailynecessitieshaveawiderangeofapplications.Thusincreasingthedegreeofautomationmachinery,reducelaborintensityandimproveworkingconditionsareinseparablefromthestudyofslider-crankmechanism.Slider-crankmechanismisimportantinthepresswithinthemainbody.Thelatenineteenthcenturytherewasconsiderablesizecrankpress.Earlytwentiethcentury,theriseoftheautomobileindustry,crankpresshasbeenrapiddevelopment.Inrecentyears,electronics,communications,computers,homeappliancesandautomotiveindustryrapiddevelopmentoftherapidgrowthindemandforstampingparts.Bothsizeandshapetendtostandardizationandserializationofthefunctionalstampings,productionvolumegrowing(suchassmallandmediumsiliconsteelstatorandrotormotor,highpressuredevicesiliconsteel,razor,(IT-chip,etc.),inordertoreducecostsandimprovelaborproductivity,thesepartsaresuitableforhigh-speedpressesformassproduction；In1910,theU.S.companysfirstfourcolumnsattheendofHenryPratttransmissionstructureofthepress,sofar,nearly100yearsofhistory,untilthepresstodayisthedevelopmentofthemostprosperousperiod.Speedpressesconstantlybeingrefreshed,suchasNidecBeijingprofitsMACH-100ultra-highspeedprecisionpress.ChinasaccessiontoWTO,theacceleratedpaceofglobalizationofmarkets,competitionhasbecomeintenseharsh,sotheindustryontheproposedhighprecisionstampingparts,goodqualityandlowcost,higherrequirements.First,theclassificationandmodelofcrankpress:Presses,includinghydraulicandmechanicaldriveofthepress,forgingmachineisdividedintomechanicalpresses,hydraulicpressesandothereightcategories,Forgingmachinesintheeightcategories,eachdividedintotencategories,eachcolumnwasdividedintotengroups.Themainparametersandthebasicmodel2thesame,butdifferentsecondaryparametersandbasicmodel,calledvariant,theclasscodetoaddaletteraftertheletterA,B,C.,inturn,saidfirst,second,thirdvariant.CrankpressmodelswithChinesephoneticalphabet,lettersandnumbersthat,forexample,themeaningofJC23-63Amodelis:JC23-63Astructureandperformanceimprovementsoverthefirstprototypemade630kN(mainparameters)Thethirdgroupofthesecondcolumn,twocolumntiltingpressopenminorandbasicmodelsofthedifferentparametersofthethirdvariantRepresentationmodelnowdescribedasfollows:Firstletterofthecodefortheclass,withthePinyinletters.Thesecondletterrepresentsavariantofthesamemodelsequencenumber.Thirdandfourthfigureswereout,thegroupcode.Horizontallinebehindthefiguresrepresentthemainparameters.Nominalpressurepressesforgeneraluseasthemainparameter.Thelastletterrepresentstheproductstructureandperformanceimprovementsintheordernumber.Someofforgingequipment,immediatelyfollowingthecolumn,thegroupbehindthecodeandaletter,onbehalfofthegeneralcharacteristicsofequipment.Second,thepressoftheworkingprincipleandstructure:3FigureofadrivecrankpressThefigure:1-Motor2-pulley3,4-Gear5-Clutch6-connectingrod7-sliderMotordrivenpulleysystem12willspreadtothesmallpowergear3,throughthesmallgear3andgear4meshingwillspreadtothecrankshaftpower,andthenusetherotationofthecrankshaftrotationintoreciprocatinglinearmotionoftheslider7.Brakeandclutcharemountedonthecrankshaft,themotordoesnotcutoffthepowersupplysituation,andstopmovingthesliderswitchcontrolthroughthemanipulationofclutchandbraketoachieve.WhenthebrakeBrake,Clutch,itwilldriveconnectedwiththecrank,powerinput,theslidermovement；Whenyouneedtostopthemovement4oftheslider,theclutchwilldisengagethetransmissionandcrankthesametime,inertiabrakeisthebrakeeffectively,sothattheslidermotionintimetostop.Third,themaintechnicalparametersofcrankpressThemaintechnicalparametersshouldreflectthepresssabilitytowork,workpiecesizecanrangeofindicatorsonproductivityandotherThemaintechnicalparametersare:NominalpressureFg(kN)andnominalpressurestrokeSg(mm).NominalpressureofFg:referstothesliderfromthelowerdeadpointtoaspecificdistance(calledthenominalpressurestrokeSg)whenthesliderallowsthemaximumforcetobear.Nominalpressureangleag:Nominalpressurestrokewiththecrankanglecorrespondingtothepressureangleisdefinedasthenominal.Sgonlytravelwithinthenominalpressure,equipment,abilitytoworktoachieveFg(alsoknownastheratedpressure)value.Nominalpressure:Mainlytakeprioritynumberseries,63,100,160,250,315KNSlidestrokes(mm)Referstothesliderfromthedeadtothenextpointafterthedeathofdistance,itsvalueistwicethecrankradius.Slidestrokewiththedeviceisusuallyanominalincreaseofpressure:someofthePressurestrokeisadjustable.Slidertripsn(1/min)Referstothecontinuousmodethesliderfromthenumberoftimesperminute,andthecorrespondingcrankspeed.Generalpressequipmentsmaller,thegreaterthenumberofstroke:highspeedpressstrokespeedisadjustable.shutheightPresstheshutheightisonlypointinthenextslide,slidetothebottomofthetableplane(itplateintheplane)betweenthedistance.Presstheshutheightbyadjustingtheconnectingrodlengthinacertainrange.Whenthebarraisedtotheminimum(ontheeccentricpressesthetripshouldbetominimum),slidethebottomtothedistancebetweenthetableplane,themaximumforthepressshutheight；whenadjustedtothelongestrod(eccentricPressthetripshouldbetomaximum),thesliderintheBDC,thebottomslidertothedistancebetweenthetableplane,theminimumforthepressshutheight.PressesDieheightminustheh