材料成型及控制工程专业英语配套教学课件刘瑛电子课件 Unit 16.ppt

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1、Unit16Rapid-prototypingoperations快速成型工艺Objective3.2.4.1.Understandthe“additive”characteristicsofrapidprototyping;Masterthenounsusedintheselectivelasersinteringprocessdescribing;Describetherapidprototypingprocessusingexpressionsoflocations.Befamiliarwiththebasicstepsinra

2、pidprototypingprocess;WarmingupWorkinpairsanddiscusswhatkindofmethodcanbeusedtomanufacturetheproductshowninFig.16-1.Selectfromthefollowingoptions,andthenwatchVideo16-1togetthefinalanswer.(1)Milling(2)Drilling(3)Grinding(4)LayerbylayermanufacturingTask1(4)AnswerFig.16-1A

3、manufacturedproductTermStudyWhentheverbsarefollowedbyadjectivalsuffixes(后缀),theymayderivenewadjectives.Forexample,act+tive=active;create+tive=creative;attract+tive=attractive;add+tive=additive;select+tive=selective;Usenewderivedadjectivestofillintheblanksbasedonyourunde

4、rstandingofabovemanufacturingprocesses.(1)Mostmachiningprocesses(milling,drilling,grinding,etc.)are(derivedformof“addorsubtract”)processesthatremovematerialfromasolidblock.(2)Rapidprototyping(Abovementionedlayerbylayermanufacturing)isan(derivedformof“addorsubtract”)proc

5、ess,combininglayersofpaper,wax,orplastictocreateasolidobject.(3)RP’s(derivedformof“addorsubtract”)natureallowsittocreateobjectswithcomplicatedinternalfeaturesthatcannotbemanufacturedbyothermeans.Task2TermStudyAnswer(4)RPisalsocalled(derivedformof“addorsubtract”)Manufact

6、uring(AM),whichaddlayersofmaterialoneatatimetobuildthesolidpartfrombottomtotopallovertheworld.(5)The(derivedformof“select”)lasersintering(选择性激光烧结)isoneofthemostimportantRPprocesses,whichusespowderedmaterials.Task2(1)subtractive(2)additive(3)additive(4)additive(5)selecti

7、veAnswerTermStudyAnswerReadthefollowingtextandfillintheblocksoftheprocessdiagram.Task3ConversiontoSTLFormatSlicetheSTLModelLayerbyLayerConstructionPostprocessingAnswerTermStudyTextSelectiveLaserSintering(SLS)isatypicalrapidprototypingprocess.StudyFig.16-3carefully,andth

8、enwatchVideo16-2.Fillintheblanksinthetext.Task4Fig.16-3PrinciplesofSelectiveLaserSinteringLaserSintering;CAD;s