grinding and turning

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1、GrindingandTurningGrindingandturningaretwotypesofmanufacturingprocess.Theyarecommonlyusedinmanufacturing.Grindingisconsideredtobeafinishingprocessthatisusuallyusedforobtaininghigh-dimensionalaccuracyandbettersurfacefinish.Turningisoftentobearoughprocesso

2、rfinishingprocesssometimes,soturningisoneofthemostcommonmanufacturingprocessesinmanufacture.Therearesomecomparisonsbetweengrindingandturningasfollows:1.ProcessSystemGrindpart:Grindingmachinesdifferinconstructionaswellascapabilities,andthetypetobeemployed

3、isdeterminedmainlybythegeometricalshapeandnatureofthesurfacetobeground.Sogrindingmachinescanbesimplyclassifiedasthecylindricalgrindingmachineandthesurfacegrindingmachine.Surfacegrindingmachineusuallyhasaplaner-typereciprocatingtableonwhichtheworkpieceish

4、eld.The“tools”ofgrindingmachineisabrasivewheelwhichsimulatesamillingcutterwithanextremelylargenumberofminiaturecuttingedges.Whenthemachineworks,theworktableonwhichtheworkpieceisheldmovesreciprocallyandtheabrasivewheelrotateswiththemachinespindle.Cylindri

5、calgrindingmachineholdstheworkpiecebetweencenters.Duringthegrindingoperation,bothworkpieceandthegrindingwheelrotateandlongitudinallinearfeedareappliedtoenablegrindingofthewholelength.Turnpart:Theturningmachineisamachinetoolusedprimarilyforproducingsurfac

6、esofrevolutionandflatedges.Wecommonlycallturningmachineaslathe.Basedontheirpurpose,construction,numberoftoolsthatcansimultaneouslybemounted,anddegreeofautomation,lathesor,moreaccurately,lathe-typemachinetoolscanbeclassifiedasmanytype.Inspiteofthatdiversi

7、tyoflathe-typemachinetools,theyallhavecommonfeatureswithrespecttoconstructionandprincipleoperation.Thesefeaturescanbestbeillustratedbyconsideringthecommonlyusedrepresentativetype,theenginelathe.Thereisaheadstockinenginelathe.Thespindleisdriventhroughtheg

8、earbox,whichishousedwithintheheadstock.Theworkpieceisoftenheldinachuckorafaceplateandrotateswiththespindle.Thelathetoolsaredesignedallkindsofshapeandgeometrydependedonthepurposeforwhichtheyareemployed.Lathetools’motionincl