《模具专业英语》-Unit 7 Basic Bending Die

DialogueMillie:Doyouknowhowmanybasictypesofdiesandmoldsaremostusedforindustries?Sandy:Well,manykinds,IthinkMillie:Whatarethey?Sandy:Theyaretheblankingdie,two-plateinjectionmold,three-plateinjectionmold,plasticinjectiondie,stampingdie,pressurecastingdieandsoonMillie:Whataretheyspecializedin?

下一页返回DialogueSandy:Generallyspeaking,thethree-plateinjectionmoldareinjectionmoldspossessingtwopartinglinesMillie:Really?Sandy:Yes.Thethree-plateinjectionmoldhasbeendesignedasdegatingmolds(浇口模具).Thismeansthatthesprueisseparatedfromthepartsinthemold.Whatelsedoyouwanttoknow?Millie:No,that’senoughforme.Thanksforyourinformation上一页返回TextBendingBasicsWhatisbending?Bendingisusuallydefinedas“theplasticdeformationofasheetmetalalongastraightline”Thisfigureshowsthemostcommonbendingoperation,whichisair-bendingprocessusingapressbrakeBendingisamanufacturingprocessbywhichmetalcanbedeformedbyplasticallydeformingthematerialandchangingitsshape.Bendingisflexibleprocessbywhichavarietyofdifferentshapescanbeproducedthroughtheuseofstandarddiesetsorbendbrakes.下一页返回TextBendingBasicsThebendingoperationcanbeconsideredasasystemwithsevencomponents:ProductWork-piece/materialEquipmentTool/dieDeformationzoneInterfaceEnvironment上一页下一页返回TextBendingBasicsInpractice,thebendanglesbetween0and90°canbeobtainedeasily.Forlargerbendangles,additionaltoolingincludingacammechanismmayberequired.1Air-bending(Fig7-2)2V-bending(Fig7-3)3U-diebending4Wipingdiebending(Fig7-4)5Coiningdiebending6Bottomdiebending7Doublediebending8

Rotarydiebending(Fig7-5)

上一页下一页返回TextBendingBasicsNewWordsandExpressionsplasticaladj可塑性的deformvt使……变形;改变……的形状sheetn薄板；薄片interfacen界面；分界面toolingv加工；使用工具mechanismn机械装置；机制上一页下一页返回TextBendingBasicsV-bendingV形弯曲U-bendingU形弯曲bedefinedas被定义为sheetmetal板材pressbrake压弯机avarietyof各种的dieset模组degatingmolds浇口模具deformationzone变形区上一页返回SupplementaryReadingCAMandApplicationsWhenadesignhasfrozen,manufacturingcanbegin-Computershaveanimportantroletoplayinmanyaspectsofproduction.Numericallycontrolled(NC)machinetoolsneedapartprogramtodefinethecomponentsbeingmade;computertechniquesexisttoassist,andinsomecasesvirtuallyautomatethegenerationofpartprogramsModemshipbuildingfabricatesstructuresfromweldedsteelplatesthatarecutfromalargesteelsheet.Computer-controlledflamecuttersareoftenusedforthistaskandthecomputerisusedtocalculatetheoptimumlayoutofthecomponentstominimizewastemetal.Numericallycontrolledpipe-routingsoftware下一页返回SupplementaryReadingCAMandApplicationsPrintedcircuitboardassemblycanalsobeimprovedbycomputermethods-Qualityismaintainedbycomputer-controlledautomatictestequipmentthatdiagnosesfaultsinaparticularboardandrejectsdefectiveboardsfromtheassemblylineComputersareusedextensivelytoplottheartworkusedtoetchprintedcircuitboardsandalsotoproducepartprogramsforNCdrillingmachines.OneofthemostimportantmanufacturingfunctionisstockandproductioncontrolIftheoriginaldesignisdoneonacomputer,obtaininglistsofmaterialrequirementsisstraightforwardStandardcomputerdataprocessingmethodsareemployedtoorganizetheworkflowandordercomponentswhenrequired(Fig7-6).上一页下一页返回SupplementaryReadingCAMandApplicationsUsingpartprogrammingsoftware,theprogrammercaneasilysolvetrigonometryproblemstodefineanaccuratetoolpathWhentheprogramisdone,theprogrammercansenditfromthePCtothemachineviaacommunicationchannelusingbuilt-insoftwarewithcommunicationscapability.Goodpartprogrammingsoftwareiscapableof:（1）Establishthemachiningparametersandtoolingforaparticularmachineorjob（2）Definingthegeometryandtoolpath（3）Codegeneration,enablingtheprogrammertousestandardcommunicationsprotocolsorcreatehisorherown上一页下一页返回SupplementaryReadingCAMandApplicationsNewWordsandExpressionsnumericallyad用数字，在数字definevt定义，详细说明fabricatevt制作，构成optimumn最适宜minimizevt将……减到最少；最小化diagnosev诊断artworkn艺术品上一页下一页返回SupplementaryReadingCAMandApplicationsetchv蚀刻sequencen次序，顺序profilen剖面，侧面clampn夹子，夹具trigonometryn三角法parametern参数，参量protocoln草案，协议上一页下一页返回SupplementaryReadingCAMandApplicationsoptimumlayout最优设计flamecutter线切割pipe-bendingmachine折弯机printedcircuitboard印制板电路cannedcycle固定循环canneddata存储数据connedroutine固定程序上一页返回TranslatingSkill(7):数词的译法Ⅰ数的单位ten十onehundred百onethousand千tenthousand万onehundredthousand十万onemillion百万下一页返回TranslatingSkill(7):数词的译法tenmillion千万onehundredmillion亿（万万）onebillion十亿tenbillion百亿onehundrdebillion千亿onetrillion兆（万亿）上一页下一页返回TranslatingSkill(7):数词的译法Ⅱ常见表达方式

aslargeas+数词，可译成“大到（至）……”asmanyas+数词，可译成“多达……”ashighas+数词，可译成“高达……”asheavyas+数词，要译成“重达……”aslowas+数词，可译成“低到（至）……”上一页下一页返回TranslatingSkill(7):数词的译法Ⅲ倍数的比较可译成A的大小（长度，重量……）是B的N倍。或A比B大（长，重……）（N-1）倍。

Incaseofelectronicscanningthebeamwidthis