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ID:2017681
大小:40.50 KB
页数:5页
时间:2017-11-14
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1、GrindingandTurningGrindingandturningaretwotypesofmanufacturingprocess.Theyarecommonlyusedinmanufacturing.Grindingisconsideredtobeafinishingprocessthatisusuallyusedforobtaininghigh-dimensionalaccuracyandbettersurfacefinish.Turningisoftentobearoughprocessorfinishingprocesssometimes,soturningis
2、oneofthemostcommonmanufacturingprocessesinmanufacture.Therearesomecomparisonsbetweengrindingandturningasfollows:1.ProcessSystemGrindpart:Grindingmachinesdifferinconstructionaswellascapabilities,andthetypetobeemployedisdeterminedmainlybythegeometricalshapeandnatureofthesurfacetobeground.Sogri
3、ndingmachinescanbesimplyclassifiedasthecylindricalgrindingmachineandthesurfacegrindingmachine.Surfacegrindingmachineusuallyhasaplaner-typereciprocatingtableonwhichtheworkpieceisheld.The“tools”ofgrindingmachineisabrasivewheelwhichsimulatesamillingcutterwithanextremelylargenumberofminiaturecut
4、tingedges.Whenthemachineworks,theworktableonwhichtheworkpieceisheldmovesreciprocallyandtheabrasivewheelrotateswiththemachinespindle.Cylindricalgrindingmachineholdstheworkpiecebetweencenters.Duringthegrindingoperation,bothworkpieceandthegrindingwheelrotateandlongitudinallinearfeedareappliedto
5、enablegrindingofthewholelength.Turnpart:Theturningmachineisamachinetoolusedprimarilyforproducingsurfacesofrevolutionandflatedges.Wecommonlycallturningmachineaslathe.Basedontheirpurpose,construction,numberoftoolsthatcansimultaneouslybemounted,anddegreeofautomation,lathesor,moreaccurately,lath
6、e-typemachinetoolscanbeclassifiedasmanytype.Inspiteofthatdiversityoflathe-typemachinetools,theyallhavecommonfeatureswithrespecttoconstructionandprincipleoperation.Thesefeaturescanbestbeillustratedbyconsideringthecommonlyusedrepresentativetype,theenginelathe.Thereisaheadstockinenginelathe.The
7、spindleisdriventhroughthegearbox,whichishousedwithintheheadstock.Theworkpieceisoftenheldinachuckorafaceplateandrotateswiththespindle.Thelathetoolsaredesignedallkindsofshapeandgeometrydependedonthepurposeforwhichtheyareemployed.Lathetools’motionincl
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