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Advancedmanufacturingtechnology機(jī)械4班Mechanicalclass4韋永柳WeiYongliuElectricaldischargemachining1、ThemaincontentNon-traditionalmachining1.1、Theconceptof
Non-traditionalmachining1.2、Thecharacteristicsof
Non-traditionalmachining1.3、Theclassificationof
Non-traditionalmachining
Theuseofelectricity,heat,light,chemicalenergy,soundenergymethodforprocessing.OrdinaryedmshapingmachineTheconceptof
Non-traditionalmachiningTheconceptof
Non-traditionalmachining
Mainlyusedforhighstrength,highhardness,hightoughness,highbrittleness,hightemperatureresistant,resistanttohardcuttingmaterialsuchasmagnetic.
1、Itisnotheavilydependentonmechanicalenergy,buttheuseofelectricity,light,soundenergyandheatenergytoremovematerial.134Thecharacteristicsof
Non-traditionalmachiningThecharacteristicsof
Non-traditionalmachining2、Onthestrengthofthecutterandworkpiece,hardnessandstiffnessnotstrictlyrequired.Thecharacteristicsof
Non-traditionalmachining3、Generalwon'tproduceworkhardening,andeasytogetgoodprocessingquality,andaclampingcanaccomplishfineroughmachiningThecharacteristicsof
Non-traditionalmachining4、Processingpoweriseasytoconvertandcontrol,toguaranteethemachiningprecisionandmachiningefficiencyThecharacteristicsof
Non-traditionalmachining5、
thespeedofremovalmaterialsislowerthantheconventionalmachiningmethod,sotheconventionalprocessingmethodsisstilldominantTheclassificationof
Non-traditionalmachiningElectricaldischargemachiningElectro-chemicalmachiningHighenergydensitybeammachiningTheclassificationof
Non-traditionalmachining2、Themaincontent2.2TheconceptoftheEDM2.1TheoriginoftheEDM2.3TheprincipleoftheEDM2.4TheprocessingelementsoftheEDM2.5ThecharacteristicsoftheEDM2.6TheuseofEDMtechnology
Theelectricerosionphenomenainedmwasfoundasearlyasthebeginningofthe20thcentury.2.1TheoriginoftheEDM2.1TheoriginoftheEDMButtherealelectricerosionphenomenonwillusetotheactualproductionprocessisinthemiddleofthe20thcenturyintheformerSovietunionLinKecouplelazaruspioneeredandinventedtheelectricsparkmachiningmethod,andin1943electriccorrosionprinciplep.a.developedtheworld'sfirstpracticaledmdevice.2.1TheoriginoftheEDMEdmequipment,intheearly1950sbegantoresearchinChinaandintheearly'60swasdevelopedfirstbyimitatingwire-cutedmmachine,thendevelopedwithcharacteristicofourcountryhighspeedwirecuttingmachinetools.
Electricaldischargemachiningisusedintheworkingliquidinthepulsedischargebetweenthetwopolesofgalvanicactionremovalinspecialprocessingmethodsofconductivematerials,alsocalleddischargemachiningorelectricalerosion,EnglishabbreviationEDM.EDMhighspeedpuncher2.2TheconceptoftheEDM2.3TheprincipleoftheEDM
Theprincipleofelectricaldischargemachiningisbasedonthetoolandworkpieceintheworkingfluidoftheinsulationbetweenpulsedsparkdischarge,localandinstantaneoushightemperature,thesurfaceofmetalmelt,gasification,casttotheprincipleofworkpiecesurface.電火花加工原理如上圖processingelementsoftheEDMToolelectrodeworkingliquiddischargegapworkpieceelctrodePulsewidthandinterval2.4TheprocessingelementsoftheEDMadvantage2.5ThecharacteristicsoftheEDM1、EDMmachiningofcomplexworkpiece,F(xiàn)ormachiningthinwalledworkpiece,deepnarrowgrooveprocessing,fineprocessinghasauniqueadvantage.2、Theprecisionofedmcanreachmicrongradeandhighsurfacequality,SurfacequalitycanreachthehighestRa=0.1mumirror。3、Suitableforprocessingallkindsofconductivematerials,nomatterhowhighhardness.1)Processingspeedisslow.2)Electrodelossandsecondarydischargeimpactmoldingprecision,Secondarydischargeevenmakesprocessingcannotcontinue.3)Fortheconductivematerialwillnotbeabletoprocess:Suchasplastic,rubberandnylon,etc。disadvantages
TheuseofelectricsparkmachiningtechnologyElectricsparkformingpunchingprocessingEdmcoldweldingwire-cutelectricdischargemachinePortableelectricsparkmachinetool2.6TheuseofEDMtechnology展望Atpresent,thevarioustechnologicalindexesofedmmachinehasreachedaveryhighlevel,electricsparkmachinetoolhastheexcellentperformanceandpowerfulfunction.Inthiscase,thefurtherdevelopmentofpresentsnewcharacteristics.Machiningtechnologydevelopmenttrendofdividedintofive:precisionultra-micronizationmodel.the,intelligent,personalized,greenenvironmentalprotectionandefficient.Especiallysincethe1990s,thedevelopmentofhighspeedmillingsqueezingth
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