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1、《ManufacturingEngineeringandTechnology—Machining》TestPaper(2004-06-17)Name:StudentNo:Score:1Drawingandmarking(CloseTest.10marks)1.1Fig1a)showsaturningtool.Pleasemarkthetoolangles(rakeangle,cuttingedgeangle,toolcuttingedgeinclinationangleandminorcuttingedgeangle)inFig1b).(5marks)1.
2、2PointingtheprocessmethodsandmarkingthemainmotionsinFig2.(5marks)2Judging.Marking√fortrueand×forfalse.(CloseTest.30marks,2marksforeach)2.1Thebuilt-upedgeisoneofthefactorsthatmostadverselyaffectingsurfacefinishincutting.(√)2.2Whencontinuouschipareformed,themachinetooliseasiertovibr
3、ateandchatterthanthecaseinwhichdiscontinouschipsareformed.(×)2.3Inturningthehighesttemperatureisusuallyfoundinthemiddleofcraterweararearatherthanthetoolcorner.(√)2.4Whenusingcarbideinsertstohardturning,weshouldcoolthecuttingzonewithcuttingfluiddiscontinously.(×)2.5Insurfacegrindin
4、gweshoulduseoilsasgrindingfluidsandinthreadgrindingweshouldusewater-basedemulsions.(×)2.6Indexablecarbideinsertsareusuallybrazedtothetoolshank.(×)2.7Diamondtoolsareusuallyusedtofinish-machiningcastironandsteels.(×)2.8themostimportantlimitationofhigh-speedsteelisthecuttingspeedstha
5、tcanbeemployed,whicharelowrelativetothoseofcarbidetools.(√)2.9Inaplaner,theworkpieceismountedonatablethattravelsalongastraightpath;inashaper,thetooltravelsalongastraightpath,andtheworkpieceisstationary.(√)2.10Three-jawchuckshavejawsthatcanbemovedandadjustedindependentlyofeachother
6、;theycanbeusedforsquareorodd-shapedworkpieces.(×)2.11Fordrilling,reamingandtapping,blindholesmustbedrilleddeeperthansubsequentreamingortappingoperationsthatmaybeperformed.(√)2.12Inconventionalmilling(upmilling),thefeeddirectionissameasthecuttingdirection.(×)2.13Thebroachingoperati
7、oncanbeusedtomachineinternalandexternalsurfaces,suchasholesofcircular,square,keyways,andflatsurfaces.(√)2.14Ingearhobing,thegearblankrotationismaincuttingmotion,whilethehobrotationisfeedmotion.(×)2.15Ahardgrindingwheelmeansitsabrasiveparticleshaveveryhighhardness.(×)3Qualitativepr
8、oblems(CloseTest.20marks,4marksfo
