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 10.ppt

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1、Unit10Rollingofmetals金属轧制ObjectiveKnowtheclassificationofrollingBefamiliarwiththeimportantstagesofhotrollingUnderstandthedetailsofhotrollingprocessUseinfinitivescorrectlyWarmingupWorkingroupsanddiscussaboutthemethodsofreducingthesheetthickness.Thinkoftheadvantag

2、esofrollingoverothermethods.Task1AnswerMethodsofreducingthethicknessofthemetalmayincludepressing,hammering,androlling,etc.Theadvantagesofrollingarespacesaving,energysaving,andhighefficiency.WarmingupReadtheshorttext,andanswerthefollowingquestions:Whatarethetwoty

3、pesofrolling?Howdopeopleclassifythem?FillintheblanksinFig.10-2.Whatshapesaretherawmaterialsoftwokindsofrollingin?Task2AnswerTextWatchVideo10-1,andfillintheblanks.Thenanswerthefollowingquestions:Whatarethemainstagesofhotrolling?Whyisheatingsoimportant?Whatwillocc

4、urduringtheheatingprocessandtransport?Whatmeasureisnecessarytoremovethat?Task3TextAnswerTextAnswerTextWatchVideo10-2,andfillintheblanksinthefollowingtext.Task4AnswerTextWatchVideo10-1andVideo10-2,andreadthetextagaintohaveawholeunderstandingofthehotrollingprocess

5、.PutthefollowingdescriptionsintherightorderandlabelFig.10-4Task5Answer(1)c(2)e(3)a(4)f(5)b(6)dInfinitive.LanguageStudyAninfinitivealmostalwaysbeginwithtofollowedbythesimpleformoftheverb,likethis:to+verb=infinitive.(1)Toindicatethepurposeorintentionofanaction(whe

6、rethe'to'hasthesamemeaningas'inorderto'or'soasto'):Example:Ahotrolledproductisoftenpickled（酸洗）toremovescale,andfurtherrolledcoldtoensureagoodsurfacefinishandoptimizethemechanicalpropertiesforagivenapplication.LanguageStudy(2)Afteradjectivesinthesepatterns:Exampl

7、e:Itisveryimportanttohaveacorrectstripprofileandflatnessbeforeanypostprocessingstarts.LanguageStudy(3)Afteranadjective+nounwhenacommentorjudgmentisbeingmade:Example:Strengthandrigidityareimportantcharacteristicstoformproductinmetalrollingmanufacture.LanguageStud

8、y(4)Aftercertainverbs,particularlyverbsofthinkingandfeeling:Example:Thetechniciandecidedtocarryoutheattreatmenttoreleasetheresidualstressoftheworkpiece..LanguageStudy