已阅读5页,还剩3页未读, 继续免费阅读
版权说明:本文档由用户提供并上传,收益归属内容提供方,若内容存在侵权,请进行举报或认领
文档简介
12009届学生毕业论文(设计)存档编号:_毕业论文外文翻译题目:数控技术及其产业发展部(系)机械与建筑工程学部_专业机械设计制造及其自动化姓名学号指导教师2009年月日21.AboutnumericalcontrolsystemdesigndevelopmentgaugeAsnotedpreviously,therearebettercommonability,flexibility,adaptability,expandingintheopennumericalcontrolsystem,countriessuchasU.S.A.,EuropeanCommunityandJapan,etc.implementthestrategicdevelopmentplanoneafteranother,carryonresearchandformulationofthesystematicnormofstructuralnumericalcontroloftheopensystem(OMAC,OSACA,OSEC),3ofworldheavyeconomycarryonthesamescienceplanandstandardizeformulationnearlyinashorttimemost,haveindicatedanewarrivalofperiodofchangeofthetechnologyofnumericalcontrol.OurcountrystartedresearchandformulationwhichstandardizedtheframeofONCnumericalcontrolsystemofChinatooin2000.2.AboutthenumericalcontrolstandardThenumericalcontrolstandardisakindoftrendofinformation-baseddevelopmentofmanufacturingindustry.Numericalcontroltechnologyinformationexchangeof50yearborn,tobasedonISO6983standard,adoptG,Mcodedescribeshowprocesses,itsessentialcharacteristicfacestheprocessingcourse,obviously,hecantmeetdemandsofhigh-speeddevelopmentofthetechnologyofmodernnumericalcontrolmoreandmorealready.Forthisreason,studyingandmakingakindofnewCNCsystemstandardISO14649(STEP-NC)intheworld,itspurposeisofferingakindofneutralmechanismnotdependingontheconcretesystem,candescribetheunifieddatamodelinwholelifespanoftheproducts,thusrealizethewholemanufactureprocess,andeventhestandardizationofeachindustrialfieldproductinformation.TheappearanceofSTEP-NCmaybearevolutionofthetechnicalfieldofthenumericalcontrol,ondevelopmentandeventhewholemanufacturingindustryofthetechnologyofnumericalcontrol,willexertafar-reachinginfluence.Firstofall,STEP-NCputsforwardakindofbrand-newmanufactureidea,inthetraditionalmanufactureidea,NCprocessestheprocedurestoallconcentrateonsinglecomputer.Underthenewstandard,NCprocedurecanbedispersedonInternet,thisisexactlyadirectionofopen,networkeddevelopmentoftechnologyofnumericalcontrol.Secondly,STEP-NCnumericalcontrolsystemalsocanreduce,process(about75%)drawing,processprocedureworkout(about35%)timeandprocess(about50%)timegreatly.Atpresent,American-EuropeancountriespaymuchattentiontotheresearchofSTEP-NC,EuropeinitiatesIMSplan(1999.1.1-2001.12.3)ofSTEP-NC.20CAD/CAM/CAPP/CNCusers,manufacturersandacademicorganizationsfromEuropeandJapanparticipatedinthisplan.STEPToolsCompanyofU.S.A.isadeveloperofthedatainterchangesoftwareofmanufacturingindustryintheglobalrange,hehasalreadydevelopedandaccusedofthesupermodel(SuperModel)ofinformationexchangeofmachinetoolingbycounting,itsgoalistodescribeallprocessingcourseswiththeunifiednorm.SuchnewdatainterchangeformhasalreadybeenverifiedinallocatingtheSIEMENS,FIDIAandEuropeanOSACA-NCnumericalcontrolatpresent.33PairsofbasicestimationsoftechnologyandindustrydevelopmentofnumericalcontrolofourcountryThetechnologyofnumericalcontrolofourcountrystartedin1958,thedevelopmentcourseinthepast50yearscanroughlybedividedinto3stages:Thefirststageisfrom1958to1979,i.e.closeddevelopingstage.Inthisstages,technologyofforeigncountriesblockadeandbasicrestrictionoftermsofourcountry,thedevelopmentofthetechnologyofnumericalcontroliscomparativelyslow.DuringSixthFive-YearPlanPeriod,theSeventhFive-YearPlanPeriodofthecountryinsecondstageandearlierstageintheEighthFive-YearPlanPeriod,introducetechnology,digestandassimilate,thestageofestablishingthesystemofproductiondomesticizationarisesingtentatively.Atthisstage,becauseofreformandopening-upandnationalattention,andstudytheimprovementofthedevelopmentenvironmentandinternationalenvironment,research,developmentandallmakingconsiderableprogressinproductiondomesticizationoftheproductsofthetechnologyofnumericalcontrolofourcountry.ThethirdstageisthatonthelaterstageintheEighthFive-YearPlanPeriodofthecountryandduringtheNinthFive-YearPlanPeriod,implementtheresearchofindustrialization,entermarketcompetitionstage.Atthisstage,madesubstantiveprogressinindustrializationofthedomesticnumericalcontrolequipmentofourcountry.IntheNinthFive-YearPlanlatterstage,domesticnumericalcontroldomesticmarketshareoflathereach50%,mixdomesticnumericalcontrolsystem(popular)toupto10%.Reviewthedevelopmentcourseinthepast50yearsoftechnologyofnumericalcontrolofourcountry,especiallypassthebrainstormof4Five-YearPlans,allinallhasmadefollowingachievements.a.Haveestablishthefoundationofthetechnicaldevelopmentofnumericalcontrol,hasbasicallymasteredthetechnologyofmodernnumericalcontrol.Ourcountryknowfromnumericalcontrolsystem,servourge,numericalcontrolhostcomputer,specialplaneandtheirbasicoffittingsbasicallyalreadynow,amongthemmosttechnologyhavealreadypossessedthefoundationthatiscommercializedanddeveloped,sometechnologyhasalready,industrializationcommercialized.a.Haveformedtheindustrialbaseofnumericalcontroltentatively.Intacklingkeyproblemsthefoundationthattheachievementandsometechnologycommercialize,setupthesystematicfactoriesofnumericalcontrolwithproductioncapacityofbatchsuchasnumericalcontrolofCentralChina,spaceflightnumericalcontroletc.ElectricalmachineryplantofLanzhou,abatchofservosystemsandfirstmachinetoolplant,firstmachinetoolplantofJinanofservoelectricalmachineryfactoryandBeijing,etc.severalnumericalcontrolhostcomputerfactoriessuchasthenumericalcontrolinCentralChina.Thesefactorieshavebasicallyformedthenumericalcontrolindustrialbaseofourcountry.b.Havesetupresearchofanumericalcontrol,development,managerialtalentsbasicteam.Thoughhasmadeconsiderableprogressinresearchanddevelopmentandindustrializationofthetechnologyofnumericalcontrol,butwewillrealizesoberly,theresearchanddevelopmentofthetechnologyofadvancednumericalcontrolofourcountry,thereisgreaterdisparitybetweencurrentsituationandcurrentdemandofourcountryofengineeringlevelespeciallyinindustrialization.Thoughveryfastfromlongitudinaldevelopmenttowatchourcountry,horizontaluntil(contrastwithforeigncountries),theengineeringlevelhasdisparity,thereisdisparitytooindevelopmentspeedinsomeaspects,i.e.thedisparityofengineeringlevelbetweensomehigh-grade,precisionandadvancednumericalcontrolequipment4hasthetendencytoexpand.Watchfromworld,estimateroughlyasfollowsaboutthenumericalcontrolengineeringlevelofourcountryandindustrializationlevel.a.Ontheengineeringlevel,inprobablybackward10-1yearswiththeadvancedlevelinforeigncountries,itisbiggerinhigh-qualityprecisionandsophisticatedtechnology.b.Attheindustrializationlevel,themarketshareislow,thevarietycoveragerateislow,havenotformedthelarge-scaleproductionyet;Functionpartspecializedlevelofproductionandformacompletesetabilitytobelower;Appearancequalityisrelativelypoor;Dependabilityisnothigh,thecommercializedintensityisinsufficient;Notsettinguponesownbrandeffectyetindomesticnumericalcontrolsystem,usershaveinsufficientconfidence.c.Attheabilityofsustainabledevelopment,tocompetitionnumericalcontrolresearchanddevelopmentoftechnology,engineeredabilityweaker;Numericalcontroltechnologicalapplicationexpandeffortstobebetter;Theresearch,formulationthatrelevantstandardsarenormallagsbehind.Itisanalyzedthatthemainreasonforhavingdisparitydescribedabovehasthefollowingseveralrespect.a.Realizetherespect.Knowtodomesticnumericalcontrolindustryprocessarduousness,complexityandlong-termcharacteristicinsufficiently;Onethatistomarketunstandard,foreignblockadeaddstrangle,system,etc.underestimatewhilebeingdifficult;Itisnotenoughtoanalyzetotechnologicalapplicationlevelandabilityofnumericalcontrolofourcountry.b.System.Paycloseattentiontonumericalcontrolindustrializationmanyintheissue,considernumericalcontrolindustrializationlittleintheissuesyntheticallyintermsofthesystematicone,industrychainintermsoftechnology;Setupintactrelatedsystem,completetraining,servicenetwork,etc.ofhighqualitysupportthesystem.c.Mechanism.Thebadmechanismcausesthebraindrain,restrainingtechnologyandtechnologicalroutefrominnovatingagain,productsinnovation,andhasrestrictedtheeffectiveimplementationofplanning,hasoftenplannedtheideal,implemen
温馨提示
- 1. 本站所有资源如无特殊说明,都需要本地电脑安装OFFICE2007和PDF阅读器。图纸软件为CAD,CAXA,PROE,UG,SolidWorks等.压缩文件请下载最新的WinRAR软件解压。
- 2. 本站的文档不包含任何第三方提供的附件图纸等,如果需要附件,请联系上传者。文件的所有权益归上传用户所有。
- 3. 本站RAR压缩包中若带图纸,网页内容里面会有图纸预览,若没有图纸预览就没有图纸。
- 4. 未经权益所有人同意不得将文件中的内容挪作商业或盈利用途。
- 5. 人人文库网仅提供信息存储空间,仅对用户上传内容的表现方式做保护处理,对用户上传分享的文档内容本身不做任何修改或编辑,并不能对任何下载内容负责。
- 6. 下载文件中如有侵权或不适当内容,请与我们联系,我们立即纠正。
- 7. 本站不保证下载资源的准确性、安全性和完整性, 同时也不承担用户因使用这些下载资源对自己和他人造成任何形式的伤害或损失。
最新文档
- 焊接用不锈钢盘条 编制说明
- 技术专家合同
- 连续买卖合同货款
- 2024年泊头市小升初全真语文模拟预测卷含答案
- 煤矿转让协议3篇
- 2024年广西壮族梧州市蝶山区小升初必考题语文检测卷含答案
- 第五单元 除法的初步认识 认识平均分(教案)二年级上册数学青岛版
- 离婚协议和睦散伙方案
- 离婚协议的合法性探讨
- 离婚协议法律效力协议的法律约束力
- 国家开放大学《实用心理学》形考任务1-4参考答案
- 妇女儿童之家工作台帐表册
- 人教版PEP五年级英语下册Unit 5 part B let's talk优秀教案
- 品质异常升级管理规定
- 2022年河北版六年级小学科学学生分组实验报告单冀教版
- 江西工伤职工停工留薪期分类目录
- 青园中信小学申报“创客教育”特色项目工作专业技术方案
- 弱电智能化工程环境保护管理体系与保障措施
- 央美美术馆借展协议合同书
- 土木工程教学楼毕业设计计算书
- 浅析英语写作中常见中式英语现象
评论
0/150
提交评论