grinding and turning

1、GrindingTurningGrindingturningaretwotypesofmanufacturingprocess.Theyarecommonlyusedinmanufacturing.Grindingisconsideredtobeafinishingprocessthatisusuallyusedfobtaininghighdimensionalaccuracybettersurfacefinish.Turningiso

2、ftentobearoughprocessfinishingprocesssometimessoturningisoneofthemostcommonmanufacturingprocessesinmanufacture.Therearesomecomparisonsbetweengrindingturningasfollows:1.ProcessSystemGrindpart:Grindingmachinesdifferinconst

3、ructionaswellascapabilitiesthetypetobeemployedisdeterminedmainlybythegeometricalshapenatureofthesurfacetobeground.Sogrindingmachinescanbesimplyclassifiedasthecylindricalgrindingmachinethesurfacegrindingmachine.Surfacegri

4、ndingmachineusuallyhasaplanertypereciprocatingtableonwhichthewkpieceisheld.The“tools”ofgrindingmachineisabrasivewheelwhichsimulatesamillingcutterwithanextremelylargenumberofminiaturecuttingedges.Whenthemachinewksthewktab

5、leonwhichthewkpieceisheldmovesreciprocallytheabrasivewheelrotateswiththemachinespindle.Cylindricalgrindingmachineholdsthewkpiecebetweencenters.Duringthegrindingoperationbothwkpiecethegrindingwheelrotatelongitudinallinear

6、feedareappliedtoenablegrindingofthewholelength.Turnpart:Theturningmachineisamachinetoolusedprimarilyfproducingsurfacesofrevolutionflatedges.Wecommonlycallturningmachineaslathe.Basedontheirpurposeconstructionnumberoftools

7、thatcansimultaneouslybemounteddegreeofautomationlathesmeaccuratelylathetypemachinetoolscanbeclassifiedasmanytype.Inspiteofthatdiversityoflathetypemachinetoolstheyallhavecommonfeatureswithrespecttoconstructionprincipleope

8、ration.Thesefeaturescanbestbeillustratedbyconsideringthecommonlyusedrepresentativetypetheenginelathe.Thereisaheadstockinenginelathe.Thespindleisdriventhroughthegearboxwhichishousedwithintheheadstock.Thewkpieceisoftenheld

9、inachuckafaceplaterotateswiththespindle.Thelathetoolsaredesignedallkindsofshapegeometrydependedonthepurposefwhichtheyareemployed.Lathetools’motionincludesaxialfeedcrossfeedmotion.Toolscutthewkpiecebythesetwomotionstocomp

10、letethemanufacturingprocess.2.ManufacturingOperationsThesetwotypesofmanufacturingprocessareoftenusedtocompletethreefrequentlyusedoperations——surfacecylindricalinternaloperation.Therearesomefeaturesofthethreeoperationsasf

11、ollows:Grindpart:Surfacegrinding:Therearetwopossiblevariationseitherahizontalverticalmachinespindlecanusetogrindflatplanesurfaces.Nomatterwhatthegrindingmodeisduringthesurfacegrindingoperationsheavywkpiecesareheldinfixtu

12、resclampedbystrapclampsonthemachinetablehoweversmallonesoftenheldbymagicchucks.Whenthewkpieceis3.CuttingToolsGrindpart:Thegrindingwheelisaspecialtoolsusedingrindingprocess.Grindingwheelsarecomposedofabrasivegrainsinsimil

13、arsizeabinder.Everyabrasivegrainontheperipherysurfaceislikeacuttingtool.Becauseofthelargenumberof“cuttingtools”grindingcanbeafinishingprocess.Therearesomanypesbetweenthegrains.thesepesassisttheeasyflowofcoolantstoenablee

14、fficientpromptremovaloftheheatgeneratedduringthegrindingprocess.Thegrindingwheelareidentifiedbasedontheirshapeansizekindofabrasivegrainsizegradeofthebondstructure.Shapesizearedeterminedbythepurposefwhichtheyaretobeused.D

15、ifferentkindofabrasiveisusedtogrinddifferentmaterials.Grainsizeofabrasiveoftendeterminedthequalityofgroundsurfaceobtained.Thegradeofthebondthestructuredeterminedtheresistanceofpullingofftheabrasivegrainsfromthegrindingwh

16、eel.Turnpart:Becausetheturninghasmuchkindofoperationsdifferentlathetoolshavedifferentshapegeometryfdifferentmanufacturingpurpose.Onthewholetheturningtoolscanbeclassifiedintoexternalcuttingtoolsinternalcuttingtools.Turnin

17、gtoolshavedifferentnoseradiifdifferentmanufacturingsuchassmallnoseradiifroughprocess.Facingtoolshavedifferenttoolsfleftrighthsidesurface.Cutofftoolsareoftenusedtocutoffthewkpiecemachineexternalannualgrooves.Thereallkinds

18、ofthreadcuttingtoolssuchastriangularsquaretrapezoidalcuttingedgesfdifferentthread.Fmtoolshaveedgesespeciallymanufacturedtotakeacertainfm.Obviouslydifferentfmmustusedifferentfmtoolstomanufacture.Grindingturningarecommonly

19、usedinmanufacturing.Grindingisoftenusedtocompletefinishingprocess.Usuallybefethefinishingprocessingrindingturningusuallycompletestheroughprocesssinceturningcanachievemanytypesofmanufacture.Infinishingprocessgrindingcanac

20、hievehighaccuracyinmostofthesurfacecylindricalmanufacture.Soweoftencombinethegrindingturninginawholemanufacturingprocess.Ifwecanunderstmeknowledgeofgrindingturningwellwecanusetheminmanufacturingprocessmereasonablyefficie

21、ntly.翻譯：磨削與車削磨削與車削磨削和車削是兩只機械加工的方法，它們廣泛應(yīng)用于機械生產(chǎn)中。磨削被認為是一種精加工方式，通常用來獲得高尺寸精度和表面粗糙度要求較高的加工要求。車削常用于粗加工和半精加工中，有時也用于精加工，所以在機械加工生產(chǎn)中車削是應(yīng)用最為廣泛的機械加工方式之一。下面有一些關(guān)于磨削與車削特點的比較：1、工藝系統(tǒng)工藝系統(tǒng)磨削加工方面磨削加工方面：磨床根據(jù)結(jié)構(gòu)和功能的不同有所區(qū)別，使用何種型號的磨床主要取決于被加工工件的幾