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ID:14509967
大小:40.50 KB
页数:5页
时间:2018-07-29
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1、GrindingandTurningGrindingandturningaretwotypesofmanufacturingprocess.Theyarecommonlyusedinmanufacturing.Grindingisconsideredtobeafinishingprocessthatisusuallyusedforobtaininghigh-dimensionalaccuracyandbettersurfacefinish.Turningisoftentobearoughprocessorfinishingprocesssometimes,soturningisoneo
2、fthemostcommonmanufacturingprocessesinmanufacture.Therearesomecomparisonsbetweengrindingandturningasfollows:1.ProcessSystemGrindpart:Grindingmachinesdifferinconstructionaswellascapabilities,andthetypetobeemployedisdeterminedmainlybythegeometricalshapeandnatureofthesurfacetobeground.Sogrindingmac
3、hinescanbesimplyclassifiedasthecylindricalgrindingmachineandthesurfacegrindingmachine.Surfacegrindingmachineusuallyhasaplaner-typereciprocatingtableonwhichtheworkpieceisheld.The“tools”ofgrindingmachineisabrasivewheelwhichsimulatesamillingcutterwithanextremelylargenumberofminiaturecuttingedges.Wh
4、enthemachineworks,theworktableonwhichtheworkpieceisheldmovesreciprocallyandtheabrasivewheelrotateswiththemachinespindle.Cylindricalgrindingmachineholdstheworkpiecebetweencenters.Duringthegrindingoperation,bothworkpieceandthegrindingwheelrotateandlongitudinallinearfeedareappliedtoenablegrindingof
5、thewholelength.Turnpart:Theturningmachineisamachinetoolusedprimarilyforproducingsurfacesofrevolutionandflatedges.Wecommonlycallturningmachineaslathe.Basedontheirpurpose,construction,numberoftoolsthatcansimultaneouslybemounted,anddegreeofautomation,lathesor,moreaccurately,lathe-typemachinetoolsca
6、nbeclassifiedasmanytype.Inspiteofthatdiversityoflathe-typemachinetools,theyallhavecommonfeatureswithrespecttoconstructionandprincipleoperation.Thesefeaturescanbestbeillustratedbyconsideringthecommonlyusedrepresentativetype,theenginelathe.Thereisaheadstockinenginelathe.Thespindleisdriventhroughth
7、egearbox,whichishousedwithintheheadstock.Theworkpieceisoftenheldinachuckorafaceplateandrotateswiththespindle.Thelathetoolsaredesignedallkindsofshapeandgeometrydependedonthepurposeforwhichtheyareemployed.Lathetools’motionincl
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