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1、《ManufacturingEngineeringandTechnology——Machining》TestPaper(2004-06-17)Name:StudentNo:Score:1Drawingandmarking(CloseTest.1()marks)1.1Figla)showsaturningtool.Pleasemarkthetoolangles(rakeanglc,cuttingedgeangle,toolcuttingedgeinclinationangleandminorcuttingedgeangle)inFiglb).(5marks)1.2Pointingthepr
2、ocessmethodsandmarkingthemainmotionsinFig2.(5marks)2Judging・MarkingVfortrueandXforfalse.(CloseTest.30marks,2marksforeach)2.1Thebuilt-upedgeisoneofthefactorsthatmostadverselyaffectingsurfacefinishincutting.(V)1.1Whencontinuouschipareformed,themachinetooliseasiertovibrateandchatterthanthecaseinwhic
3、hdiscontinouschipsareformed.(X)1.2Inturningthehighesttemperatureisusuallyfoundinthemiddleofcraterweararearatherthanthetoolcorne匚(J)1.3Whenusingcarbideinsertstohardturning,weshouldcoolthecuttingzonewithcuttingfluiddiscontinously.(X)1.4Insurfacegrindingweshoulduseoilsasgrindingfluidsandinthreadgrin
4、dingweshouldusewater-basedemulsions.(X)1.5Indexablecarbideinsertsareusuallybrazedtothetoolshank.(X)1.6Diamondtoolsarcusuallyusedtofinish-machiningcastironandsteels.(X)1.7themostimportantlimitationofhigh-speedsteelisthecuttingspeedsthatcanbeemployed,whicharelowrelativetothoseofcarbidetools.(V)1.8I
5、naplaner,theworkpieceismountedonatablethattravelsalongastraightpath;inashaper,thetooltravelsalongastraightpath,andtheworkpieceisstationary.(V)1.9Three-jawchuckshavejawsthatcanbemovedandadjustedindependentlyofeachother;theycanbeusedforsquareorodd-shapedworkpieces.(X)1.10Fordrilling,reamingandtappi
6、ng,blindholesmustbedrilleddeeperthansubsequentreamingortappingoperationsthatmaybeperformed.(V)1.11Inconventionalmilling(upmilling),thefeeddirectionissameasthecuttingdirection.(X)2」3Thebroachingoperationcanbeusedtomachineinternalandexternalsurfaces,suchasholesofcircular,square,keyways,andflatsurfa
7、ces.(V)2.14Ingearhobing,thegearblankrotationismaincuttingmotion,whilethehobrotationisfeedmotion.(X)2」5Ahardgrindingwheelmeansitsabrasiveparticleshaveveryhighhardness.(X)2Qualitativeproblems(CloseTest.20marks,4marksfore
