翅片管绕片机送料装置设计-暖气管绕制机设计(全套含CAD图纸)
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1附录1译文数控技术1当前世界NC机床的研究现状世界各国对数控机床、加工中心以至FMS、CIMS等各种新技术的研究与发展进程,是与世界经济形势紧密相连的。机床工业有世界经济相互促进和发展,进入21世界知识机警时代,人们的知识所起的作用更加突出,而机床工业作为机器制造业的基础,其重点地位与战略意义也更加明显。在19911994年间,世界经济衰退,昂贵的FMS,CIMS降温,19952000年间,世界经济在低速增长,根据当前世界市场各方面用户为提高生产率对NC机床的要求以及世界四大国际机床展(欧洲的EMO、美国的IMTS、日本的JIMTOF、中国的CIMT)上展品的分析,当前世界NC机床的技术研究主要有以下几点(1)更加重视新技术和创新在世界范围内,对新工艺、新材料、新结构、新单元、新元件的研究开发工作正在大力开展,如新的刀具材料、新的主轴结构、高速电主轴、高速直线电机等的开发研究。以加工工艺的改进创新为基础,为加工超硬、难切削材料及特殊复合材料及复杂零件、不规则曲面等在不断研究开发新机种。(2)提高机床加工的精度和研究为了提高加工中心的加工精度,不断提高机床的刚度、减少振动,消除热变形,降低噪声,提高NC机床的定位精度、重复精度、工作可靠性、稳定性、精度保持性,世界很多国家都在进行机床热误差、机床运动及负载变形误差的软件补偿技术研究,并采取精度补偿、软件补偿等措施加以改善,有的已经可以使此类误差消除60。并在不断开发精细加工,纳米加工。(3)提高机床加工生产率的研究世界NC机床、加工中心及相应的高速点主轴、直线电机、测量系统、2NC系统的开发,均以提高生产率为前提。2加工中心的分类(1)按工艺用途分类有镗铣加工中心,分为立式樘铣加工中心、卧式樘铣加工中心和龙门樘铣加工中心。其加工工艺以樘铣为主,用于箱体,壳体以及各种复杂零件特殊曲线和曲面轮廓的多工序加工,适合多品种小批量生产。复合加工中心,主要指五面复合加工,主轴头可自动回转,进行立,卧加工,在主轴自动回转后,在水平和垂直方向实现知道变换。(2)按特殊功能分类有单工作台、双工作台加工中心;单轴、双轴、三轴及可换主轴箱的加工中心;立式转塔加工中心和卧式转塔加工中心;刀库加主轴换刀加工中心;刀库接写手加主轴换刀加工中心;刀库加机械手加双主轴转塔加工中心。3当今数控机床的发展趋势目前,世界先进制造技术不断兴起,超高速切削、超精密加工等技术的应用,柔性制造系统的迅速发展和计算机集成系统的不断成熟,对数控加工技术提出了更高的要求。当今数控机床正在朝着以下几个方向发展。(1)高速度、高精度化速度和精度是数控机床的两个重要指标,它直接关系到加工效率和产品质量。目前,数控系统采用位数、频率更高的处理器,以提高系统的基本运算速度。同时,采用超大规模的集成电路和多微处理器结构,以提高系统的数据处理能力,即提高插补运算的速度和精度。并采用直线电动机直接驱动机床工作台的直线伺服进给方式,其高速度和动态响应特性相当优越。采用前馈控制技术,使追踪滞后误差大大减小,从而改善拐角切削的加工精度。(2)可靠性最大化数控机床的可靠性一直是用户最关心的主要指标。数3控系统将采用更高集成度的电路芯片,利用大规模或超大规模的专用及混合式集成电路,以减少元器件的数量,来提高可靠性。通过硬件功能软件化,以适应各种控制功能的要求,同时采用硬件结构机床本体的模块化、标准化和通用化及系列化,使得既提高硬件生产批量,又便于组织生产和质量把关。还通过自动运行启动诊断、在线诊断、离线诊断等多种诊断程序,实现对系统内硬件、软件和各种外部设备进行故障诊断和报警。利用报警提示,及时排除故障;利用容错技术,对重要部件采用“冗余”设计,以实现故障自恢复;利用各种测试、监控技术,当生产超程、刀损、干扰、断电等各种意外时,自动进行相应的保护。4附录2英文参考资料NCTECHNOLOGY1、RESEARCHCURRENTSITUATIONOFNCLATHEINOURTIMESRESEARCHANDDEVELOPMENTPROCESSTOSUCHVARIOUSKINDSOFNEWTECHNOLOGIESASNUMERICALCONTROLLATHE,MACHININGCENTER,FMS,CIMS,ETCOFCOUNTRIESALLOVERTHEWORLD,LINKEDTOWITHTHEINTERNATIONALECONOMICSITUATIONCLOSELYTHEMACHINETOOLINDUSTRYHASINTERNATIONALECONOMYTOMUTUALLYPROMOTEANDDEVELOP,ENTER21ALERTERASOFWORLDAFFAIRS,THEFUNCTIONTHATPEOPLESKNOWLEDGEPLAYSISMOREOUTSTANDING,ANDTHEMACHINETOOLINDUSTRYISREGARDEDASTHEFOUNDATIONOFTHEMANUFACTURINGINDUSTRYOFTHEMACHINE,ITSKEYPOSITIONANDSTRATEGICMEANINGAREMOREOBVIOUSWITHIN19911994YEARS,THEECONOMICRECESSIONOFTHEWORLD,EXPENSIVEFMS,CIMSLOWERSTHETEMPERATURE,AMONG19952000YEARS,THEINTERNATIONALECONOMYINCREASESATALOWSPEED,ACCORDINGTOREQUISITIONFORNCLATHEANDTHEWORLDFOURMAJORINTERNATIONALLATHESEXHIBITIONINORDERTOBOOSTPRODUCTIVITYOFUSERSOFVARIOUSFIELDSOFPRESENTWORLDMARKETEMO,IMTS,JIMTOF,CHINACIMTOFJAPANOFUSAOFEUROPE,HAVETHEANALYSISOFTHEEXHIBIT,THEREARETHEFOLLOWINGSEVERALPOINTSMAINLYINTHETECHNICALRESEARCHOFNCLATHEINOURTIMES(1)PAYMOREATTENTIONTONEWTECHNOLOGYANDINNOVATIONWORLDWIDE,ARELAUNCHINGTHENEWCRAFT,NEWMATERIAL,NEWSTRUCTURE,NEWUNIT,RESEARCHANDDEVELOPMENTOFTHENEWCOMPONENTINAMORECOSTEFFECTIVEMANNER,DEVELOPMENTALRESEARCHOFFORINSTANCENEWCUTTERMATERIAL,THENEWELECTRICMAINSHAFTOFMAINSHAFTSTRUCTURE,HIGHSPEED,HIGHSPEEDSTRAIGHTLINEELECTRICALMACHINERY,ETCREGARDINNOVATINGINIMPROVEMENTOFTHEPROCESSINGTECHNOLOGYASTHEFOUNDATION,FORPROCESSULTRAANDHARDDIFFICULTTOCUTMATERIALANDSPECIALCOMPOSITEANDCOMPLICATEDPART,IRREGULARCURVEDSURFACE,ETCRESEARCHANDDEVELOPNEWLATHEVARIETYCONSTANTLY5(2)IMPROVETHEPRECISIONANDRESEARCHOFMACHINETOOLINGINORDERTOIMPROVETHEMACHININGACCURACYOFTHEMACHININGCENTER,AREIMPROVINGRIGIDITYOFTHELATHE,REDUCTIONVIBRATIONCONSTANTLY,DISPELHOTLYANDOUTOFSHAPE,REDUCETHENOISE,IMPROVETHEPRECISIONOFLOCALIZATIONOFNCLATHE,REPEATPRECISION,WORKINGDEPENDABILITY,STABILITY,PRECISIONKEEPING,WORLDALOTOFCOUNTRYCARRYONLATHEHOTERROR,LATHESPORTANDLOADOUTOFSHAPESOFTWAREOFERRORCOMPENSATETECHNICALRESEARCH,TAKEPRECISIONCOMPENSATE,SOFTWARECOMPENSATEMEASUREIMPROVE,SOMEMAYMAKETHISKINDOFERRORDISPEL60ALREADYANDISDEVELOPINGRETROFITCONSTANTLY,NANOMETERISBEINGPROCESSED(3)IMPROVETHERESEARCHOFTHEMACHINETOOLINGPRODUCTIVITYWORLDNCLATHE,MACHININGCENTERANDCORRESPONDINGSOMEDEVELOPMENTOFMAINSHAFT,ELECTRICALMACHINERYOFSTRAIGHTLINE,MEASURINGSYSTEM,NCSYSTEMOFHIGHSPEED,UNDERTHEPREREQUISITEOFBOOSTINGPRODUCTIVITY2、CLASSIFICATIONOFTHEMACHININGCENTER(1)PROCESSACCORDINGTOMAINSHAFTSPACEPOSITIONWHENITCLASSIFIESTOBEASFOLLOWS,HORIZONTALANDVERTICALMACHININGCENTERHORIZONTALMACHININGCENTER,REFERTOTHEMACHININGCENTERTHATTHEAXISLEVELOFTHEMAINSHAFTISSETUPHORIZONTALMACHININGCENTERFOR35SPORTCOORDINATEAXIS,ACOMMONONETHREERECTILINEARMOTIONCOORDINATEAXISANDONETURNTHECOORDINATEAXISOFSPORTSROUNDTURNTHEWORKINGBENCHROUND,ITCANONEISITISITFINISHOTHER4TAXIPROCESSINGBESIDESINSTALLINGSURFACESANDTOPSURFACESTOINSERTTOINSTALLINWORKPIECE,MOSTSUITABLEFORPROCESSINGTHECASEBODYWORKPIECECOMPAREDWITHSTRENGTHTYPEMACHININGCENTERIT,THESTRUCTUREISCOMPLICATED,THEFLOORSPACEISLARGE,QUALITYISLARGE,THEPRICEISHIGHVERTICALMACHININGCENTER,THEAXISOFTHEMAINSHAFTOFTHEVERTICALMACHININGCENTER,INORDERTOSETUPVERTICALLY,ITSSTRUCTUREISMOSTLYTHEREGULARPOSTTYPE,THEWORKINGBENCHISSUITABLEFORPROCESSINGPARTSFORTHESLIPPERYONEOFCROSS,HAVE3RECTILINEARMOTIONCOORDINATEAXISGENERALLY,CANFINDAROOMFORONEHORIZONTALNUMERICALCONTROLREVOLVINGSTAGETHE4THAXLEOFAXLEPROCESSTHESPIRALPARTATWORKINGBENCHTHEVERT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