模具专业英语

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1、UnitFiveCAD/CAM/CAEPassageOneAutoCADPassageTwoTheComputerinDieDesignPassageThreeCAD/CAMPassageFourComputerIntegratedManufacturingSystemPassageFiveCAEPassageOneAutoCAD1CAD①isatechniqueofusingacomputertocreate，modify，andrefineadesign②.It，normallyusedinengineeringdepartm

2、ents，hasgreatlychangedthesedepartments.Drawingsusedtobemadeonpaperwithpencilorpenanddrawinginstruments.Thedrawingswereverytime-intensivetoproduce.Theywerethencopied，andthecopiesweresenttothefloorforproduction.Theoriginalswerestoredinlargedrawers.Evenasmalljobshopcould

3、havethousandsoflargeblueprintsonfile.Ifchangeswerenecessary，theengineerwouldgettheoriginaloutofthefiledrawer，makethechanges，copyit，andsendthenewprinttoUnitFiveCAD/CAM/CAEUnitFiveCAD/CAM/CAEthefloor.Nowadaysthecomputercaneliminatetheneedforallofthephysicalstorageofprin

4、ts.Thecomputeralsoallowsforrapidandeasymodifications.Theengineerordesignerfirstdrawsthepartonthescreenofcomputer.Thispartdrawingistheactualpartgeometry.Thesizesandlocationsareallcorrectsothattheinformationcanbeusedlatertocreateaprogramtomachinethepart③.Actually，youcan

5、alsodrawthegeometryofaworkpiecewithCADsoftwareonacomputer.Youmaycreatethedesignmodelbyapplyinggraphicscommandsstoredinthecomputer.Fig.5-1isatypicalpartdrawinginterfaceofAutoCADsoftware.YouhavecompletefreedomtozoomandviewthemodelatdifferentUnitFiveCAD/CAM/CAEFig.5-1Aty

6、picalpartdrawinginterfaceofAutoCADUnitFiveCAD/CAM/CAEorientationsandthenrepresentthedesignasasetofpoints，lines，arcs，andsoonbyusingbasicCADsoftware.Actually，graphicseditingcommandsallowforeasymodificationsasrequired.AutoCADisaComputerAidedDesign（CAD）programusedbyjustab

7、outeveryengineeringanddesignofficeintheworld.WhenyoustartAutoCAD，theAutoCADwindowwillopen.Thewindowisactuallyyourdesignworkspace.HowcreateanewdrawingwithAutoCAD?Firstly，youchoose“New”fromthe“File”menu.ThedialogueboxwillappearinthecommandwindowundersideoftheAutoCADwind

8、ow.Secondly，youcanchoose“StartfromScratch”，under“SelectDefaultSetting”select“English”or“Metric”，andUnitFiveCAD/CAM/CAEthench