Advancedmanufacturingtechnology機械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，Formachiningthinwalledworkpiece,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