机械类外文文献.docx
- 文档编号:5088791
- 上传时间:2022-12-13
- 格式:DOCX
- 页数:8
- 大小:23KB
机械类外文文献.docx
《机械类外文文献.docx》由会员分享,可在线阅读,更多相关《机械类外文文献.docx(8页珍藏版)》请在冰豆网上搜索。
机械类外文文献
Numericalcontroltechnologyandequippingdevelopmenttrendandcountermeasure
Equiptheengineeringlevel,levelofdeterminingthewholenationaleconomyofthemodernizeddegreeandmodernizeddegreeofindustry,numericalcontroltechnologyisitdevelopnewdevelopingnewhigh-techindustryandmostadvancedindustrytoequip(suchasinformationtechnologyandhisindustry,biotechnologyandhisindustry,aviation,spaceflight,etc.nationaldefenseindustry)lasttechnologyandgettingmorebasicmostequipment.Marxhaseversaid"thedifferencesofdifferenteconomictimes,donotlieinwhatisproduced,andlieinhowtoproduce,producewithsomemeansoflabor".Manufacturingtechnologyandequippingthemostbasicmeansofproductionthatarethatthemankindproducedtheactivity,andnumericalcontroltechnologyisnowadaysadvancedmanufacturingtechnologyandequipsthemostcentraltechnology.Nowadaysthemanufacturingindustryallaroundtheworldadoptsnumericalcontroltechnologyextensively,inordertoimprovemanufacturingcapacityandlevel,improvetheadaptivecapacityandcompetitivepowertothechangeablemarketofthetrends.Inadditioneveryindustriallydevelopedcountryintheworldalsoclassifiesthetechnologyandnumericalcontrolequipmentofnumericalcontrolasthestrategicmaterialsofthecountry,notmerelytakethegreatmeasuretodevelopone'sownnumericalcontroltechnologyandindustry,andimplementblockadingandrestrictivepolicytoourcountryinviewof"high-grade,precisionandadvancedkeytechnologyofnumericalcontrol"andequipping.Inaword,developtheadvancedmanufacturingtechnologytakingnumericalcontroltechnologyasthecoreandalreadybecomeeveryworlddevelopedcountryandaccelerateeconomicdevelopmentinamorecost-effectivemanner,importantwaytoimprovetheoverallnationalstrengthandnationalposition.
Numericalcontroltechnologyisthetechnologycontrolledtomechanicalmovementandworkingcoursewithdigitalinformation,integratedproductsofelectromechanicsthatthenumericalcontrolequipmentisthenewtechnologyrepresentedbynumericalcontroltechnologyformstothemanufactureindustryofthetraditionandinfiltrationofthenewdevelopingmanufacturingindustry,namelytheso-calleddigitizationisequipped,itstechnologicalrangecoversalotoffields:
(1)Mechanicalmanufacturingtechnology;
(2)Informationprocessing,processing,transmissiontechnology;(3)Automaticcontroltechnology;(4)Servodrivetechnology;(5)Technologyofthesensor;(6)Softwareengineering,etc..
1Developmenttrendofanumericalcontroltechnology
Theapplicationofnumericalcontroltechnologyhasnotonlybroughttherevolutionarychangetomanufacturingindustryofthetradition,makethemanufacturingindustrybecometheindustrializedsymbol,andwiththeconstantdevelopmentofnumericalcontroltechnologyandenlargementoftheapplication,thedevelopmentofsomeimportanttrades(IT,automobile,lightindustry,medicaltreatment,etc.)tothenationaleconomyandthepeople'slivelihoodofhisplaysamoreandmoreimportantrole,becausethedigitizationthatthesetradesneededtoequiphasalreadybeenthemaintrendofmoderndevelopment.Numericalcontroltechnologyintheworldatpresentandequippingthedevelopmenttrendtosee,thereisthefollowingseveralrespect[1-]initsmainresearchfocus.
1.1Ahigh-speed,highfinishmachiningtechnologyandnewtrendequipped
Theefficiency,qualityaresubjavanufacturingtechnology.High-speed,highfinishmachiningtechnologycanraisetheefficiencygreatly,improvethequalityandgradeoftheproducts,shortenproductioncycleandimprovethemarketcompetitivepower.Japancarriesthetechnologicalresearchassociationfirsttoclassifyitasoneofthe5greatmodernmanufacturingtechnologiesforthis,learn(CIRP)toconfirmitasthecentreinthe21stcenturyandstudyoneofthedirectionsininternationalproductionengineering.
Inthefieldofcarindustry,produceonesecondwhenbeatsuchasproductionof300,000/vehicleperyear,andmanyvarietyprocessitiscarthatequipkeyproblemthatmustbesolvedoneof;Inthefieldsofaviationandaerospaceindustry,sparepartsofitsprocessingaremostlythethinwallandthinmuscle,rigidityisverybad,thematerialisaluminiumoraluminiumalloy,onlyinasituationthatcutthespeedandcutstrengthverysmallhigh,couldprocessthesemuscles,walls.Adoptlarge-scalewholealuminiumalloymethodthatblank"payempty"makethewingrecently,suchlarge-scalepartsasthefuselage,etc.cometosubstitutealotofpartstoassemblethroughnumerousrivet,screwandotherconnectionway,maketheintensity,rigidityanddependabilityofthecomponentimproved.Allthese,toprocessingandequippingthedemandwhichhasproposedhigh-speed,highpreciseandhighflexibility.
AccordingtoEMO2001exhibitionsituation,high-speedmachiningcenterisitgivespeedcanreach80m/minisevenhigh,airtransportcompetentspeedcanupto100m/mintobeabouttoenter.Alotofautomobilefactoriesintheworldatpresent,includingShanghaiGeneralMotorsCorporationofourcountry,havealreadyadoptedandsubstitutedandmadethelatheupwiththeproductionlinepartthatthehigh-speedmachiningcentermakesup.HyperMachlatheofU.S.A.CINCINNATICompanyenterstonearlybiggest60m/minofspeed,itis100m/mintobefast,theaccelerationreaches2g,therotationalspeedofthemainshafthasalreadyreached60000r/min.Processingathinwallofplaneparts,spend30minonly,andsamepartgeneralatahighspeedmillingmachineprocessandtake3h,theordinarymillingmachineisbeingprocessedtoneed8h;ThespeedandaccelerationofmainshaftofdualmainshaftlathesofGermanyDMGCompanyareupto120000r/mmand1g.
Inmachiningaccuracy,thepast10years,ordinaryprogressionaccuseofmachiningaccuracyoflathebring5μmuptofrom10μmalready,accurategradesofmachiningcenterfrom3~5μm,riseto1~1.5μm,andultraprecisionmachiningaccuracyisitenternanometergradetobeginalready(0.01μm).
Independability,MTBFvalueoftheforeignnumericalcontroldevicehasalreadyreachedabove6000h,MTBFvalueoftheservosystemreachesabove30000h,demonstrateveryhighdependability.
Inordertorealizehigh-speed,highfinishmachining,ifthepartoffunctionrelatedtoitiselectricmainshaft,straightlineelectricalmachinerygetfastdevelopment,theapplicationisexpandedfurther.
1.2Linkandprocessandcompoundtoprocessthefastdevelopmentofthelathein5axes
Adopt5axlestolinktheprocessingofthethree-dimensionalcurvedsurfacepart,cancutwiththebestgeometryformofthecutter,notonlyhighlypolished,butalsoefficiencyimprovesbyalargemargin.Itisgenerallyacknowledged,theefficiencyofan5axlegearbedscanequal23axlegearbeds,isitwaitfortousethecubicnitrogenboronthemillingcutterofultrahardmaterialismilledandparedatahighspeedwhilequenchingthehardsteelpart,5axleslinkandprocess3constantaxlestolinkandprocessandgiveplaytohigherbenefit.Becausesuchreasonsascomplicatedthat5axleslinkthenumericalcontrolsystem,hostcomputerstructurethatbutgoover,itisseveraltimeshigherthatitspricelinksthenumericalcontrollathethan3axles,inadditionthetechnologicaldegreeofdifficultyofprogrammingisrelativelygreat,haverestrictedthedevelopmentof5axlegearbeds.
Atpresentbecauseofelectricappearanceofmainshaft,isitrealize5axlecomplexmainshafthairstructureprocessedtolinkgreatlysimplifytomake,itmakesdegreeofdifficultyandreducingbyalargemarginofthecost,thepricedisparityofthenumericalcontrolsystemshrinks.Sopromoted5axlegearbedsofheadofcomplexmainshaftandcompoundtoprocessthedevelopmentofthelathe(processthelatheincluding5).
AtEMO2001exhibition,newJapanese5ofworkermachineprocesslatheadoptcomplexmainshafthair,canrealizetheprocessingof4verticalplanesandprocessingofthewantonangle,make5timesprocessand5axlesareprocessedandcanberealizedonthesamelathe,canalsorealizetheinclinedplaneandpourtheprocessingoftheholeofawls.GermanyDMGCompanyexhibitstheDMUVoutionseriesmachiningcenter,butputandinsertandputprocessingand5axles5timestolinkandprocessinonce,canbecontrolledbyCNCsystemorCAD/CAMiscontrolleddirectlyorindirectly.
1.3Becomethemaintrendofsystematicdevelopmentofcontemporarynumericalcontrolintelligently,openly,networkedly.
Thenumericalcontrolequipmentinthe21stcenturywillbesuretheintelligentsystem,theintelligentcontentincludesallrespectsinthenumericalcontrolsystem:
Itisintelligentinordertopursuetheefficiencyofprocessingandprocessquality,controlsuchastheself-adaptationoftheprocessingcourse,thecraftparameterisproducedautomatically;Jointheconvenientoneinordertoimprovetheperformanceofurginganduseintelligently,iffeedforwardcontrol,adaptiveoperation,electricalmachineryofparameter,discernloadselectmodels,sinceexactlymakesetc.automatically;Theonesthatsimplifiedprogramming,simplifiedoperatingaspectareintelligent,forinstanceintelligentautomaticprogramming,intelligentman-machineinterface,etc.;Therearecontentofintelligencediagnose,intelligentmonitoring,diagnosisconvenienttobesystematicandmaintaining,etc..
Producetheexistingproblemfortheindustrializationofsolvingthetraditionalnumericalcontrolsystemsealingandnumericalcontrolapplicationsoftware.Alotofcountriescarryonresearchtotheopen
- 配套讲稿:
如PPT文件的首页显示word图标,表示该PPT已包含配套word讲稿。双击word图标可打开word文档。
- 特殊限制:
部分文档作品中含有的国旗、国徽等图片,仅作为作品整体效果示例展示,禁止商用。设计者仅对作品中独创性部分享有著作权。
- 关 键 词:
- 机械类 外文 文献