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  • Basic principle and application of quenching
  • 2021/10/26
  • Inductionheatingsurfacequenchingisaquenchingmethodthatusestheprincipleofelectromagneticinductiontomakethepartscutthemagneticlineinthealternatingmagneticfield,generateinductioncurrentonthesurface,andquicklyheatthesurfaceofthepartintheformofvortex,andthenheatcold.Itoccupiesanimportantpositioninthefieldofheattreatment,andthistechnologyhasbeenwidelyusedinourcountry. Selectionofquenchingheatingfrequencyofinductionheatingsurface: Therelationshipbetweenthedepthof8(mm)intothesurfaceoftheworkpieceandthecurrentfrequencyf(HZ)atroomtemperatureistheincreasedfrequency,thecurrentpenetrationdepth,andthequenchinglayer Commonusedcurrentfrequenciesare: 1.Highfrequencyheating:100~500KHZ,commonlyused200~300KHZ,ishighfrequencytubeheating,thequenchinglayeris0.5~2.5mm,issuitableforsmallandmedium-sizedparts. 2.Mediumfrequencyheating:thecurrentfrequencyis500~10000HZ,commonlyused2500~8000HZ,thepowerequipmentismechanicalmediumfrequencyheatingdeviceorsiliconcontrolledmediumfrequencygenerator,quenchinglayerdepthof~10mm,suitableforlargediametershaftandlargegear,etc 3.Powerfrequencyheating:thecurrentfrequencyis50HZ.Mechanicalworkingfrequencyheatingpowerequipment,thequenchinglayerdepthof10~20mm,suitableforsurfacequenchingoflargediameterworkparts. Theapplicationofinductionheatingsurfacequenchingandordinaryadditivecontrolfirehave: 1.Theadditivespeedisveryfast,whichcanexpandthetransitiontemperaturerangeoftheAbodyandshortenthetransitiontime 2.Afterquenching,extremelyfinecryptocrystallinemartenitecanbeobtainedonthesurfacelayer,withslightlyhigherhardness(2~3HRC),lowfragilityandhighfatiguestrength 3.Theartifactisnoteasytooxidationanddecarbonize,andcanbedirectlyassembledandusedaftersomebutyloutsourcing, 4.Controlthedeephardlayer,easytodrycontrol,easytodrytoachievemechanizationandautomation.  
  • Characteristics and principle of induction heating power supply
  • 2021/10/26
  • Inductionheatingpowersupplyhasthehighestheatingefficiency,thefastestspeedformetalmaterials,andlowconsumptionandenvironmentalprotection.Ithasbeenwidelyusedinthethermalprocessing,heatprocessing,thermalassembly,weldingandsmeltingofmetalmaterials.Theinductionheatingpowersupplyconsistsoftwoparts,onepartistheACpowersupply,alsoknownasthefrequencyconversionpowersupply;theotherpartistheinductioncoil,calledthesensor. operationalprinciple: Inductionheatingistheuseofelectromagneticinductiontogeneratetheinternalcurrentoftheheatedmaterial,relyingontheenergyofthesevorticesforheatingpurposes.Thebasiccomponentsoftheinductionheatingsystemincludeinductioncoils,anACpowersupply,andaworkpiece.Andthecoilcanbemadeintodifferentshapes,dependingontheheatingobject.Thecoilisconnectedtothepowersupplywhichprovidesthealternatingcurrenttothecoilthroughthecoilgeneratesanalternatingmagneticfieldthroughtheworkpiecewhichgeneratesthevortextoheat.Simplyput,itistoproducealternatingcurrent,thusproducealternatingmagneticfield,reusetoproducevortextoachievetheheatingeffect. characteristic: ①doesnotneedtobeoverallheating,smallartifactdeformationandsmallpowerconsumption: ②pollution-free: ③hasfastheatingspeedandlessdecarbonizationofartifactsurface: The④surfacequenchinglayercanbeadjustedasneededandeasytocontrol: ⑤inductionheatingequipmentcanbeinstalledonthemachiningproductionline,easytoachievemechanizationandautomationandeasymanagement,andcanreducetransportation,savemanpower,improveproductionefficiency: ⑥Marteniteisfineandhashighhardness,strengthandtoughness: Afterquenchingthesurfaceof⑦,thesurfacehaslargecompressioninternalstressandhighfatiguebreakingresistance.Inductionheatingheattreatmentalsohassomedrawbacks.Comparedtotheflamequenching,theinductionheatingequipmentismorecomplexandlessadaptable,whichisdifficulttoguaranteequalityforsomeartifactswithcomplexshapes: YKinductionpowerserieshasacompleterangeofproducts,focusingoninductionheating,andcanprovidesolutionsandapplicableinductionpowerfordifferentstandardsupply!
  • Application of conductive magnet in induction heating equipment
  • 2021/10/25
  • Conductormagnetininductionheatingtreatmentwhetherinnerholequenchingorlonginnerholequenching,therearematureprocesses,conventionalhighfrequencyquenchingequipmentproducts,typicalexamples,buttheconductivemagnetininductionheatingheattreatmentisasfollows:1.Aboutinductionheating:inductionheatingmakestheinternalcurrentisvortex,relyingonthevortexenergytoachievethepurposeofheating.Itismainlyusedformetalworking,heattreatment,welding,andsmelting.Inrecentyears,withthecontinuousimprovementofinductionheatingtheoryandthecontinuousdevelopmentofinductionheatingequipment,theapplicationfieldandscopeofinductionheatingarealsoconstantlyexpanding.Atpresent,inductionheatingtechnologyhasbeenwidelyusedinmachinerymanufacturing,metallurgy,nationaldefenseaerospace,automobilemanufacturing,teaching,scientificresearchandmanyotherfields,mainlyusedinblackandnon-ferroussmeltingcasting,heatforging,heattreatment,welding,sinteringandotheraspectsofferrousmetalmaterials. 2.Abouttheconductivemagnets Aconductingmagnet,alsoknownasamagneticfieldconcentrator,isalaminatedorblockelementmadeofamagneticmaterial.Accordingtothedifferentfrequencyoftheinductionheatingequipment,itcanbedividedintomediumfrequencyconductormagnetandhighfrequencyconductormagnet.(Aboutinductionheatingmediumfrequencyconductormagnet,highfrequencyconductionmagnetsandconductormagnetyoucanconsulttoourwidesourcefrequencyconversioninductionheatingequipmentfactory)usingconductormagnetdesignsensorheatingwithitshighheatingefficiency,fastspeed,goodcontrollability,mechanization,automation,hasbeenwidelyusedinsmelting,casting,bendingpipe,heatforging,weldingandsurfaceheattreatmentindustries.Itistomaketheworkpiecesurfaceproduceacertaininductioncurrent,quicklyheatingthepartsurfacetoachievethesurfaceofrapidheating,andevenheatmeltingeffect. Inductionbrazing:Theapplicationeffectoftheinductionmagnetintheinductionbrazingprocessisveryremarkable,whichcanmaketheinductionpowerconcentratedintherequiredarea,shieldingtheinductioneffectofotherpositions,soastoimprovetheefficiencyoftheinductionsystem. Inductionquenching:conductivemagnetsarewidelyusedininductionquenching.Addaconductivemagnetonthequenchingsensor,usingthesloteffectoftheconductivemagnet,canadjustthecurrentonthesensor,toapplymorepowertotherequiredheatingparts,reducetheworkpiecedistortionandoxidation,improveproductivity,playtheroleofconcentratedenergysavingandefficiency,especiallyontheinnerholeandplaneheatingsensor,theeffectisverysignificant. YKinductionheatingequipmentserieshasacompleterangeofproducts,focusoninductionheating,webetterunderstandtheinductionheatingprocess,welcometoconsult!
  • Application and development prospect of high-frequency induction heating equipment
  • 2021/10/25
  • Inductionheatingtechnologycurrentlyhasthehighestheatingefficiency,thefastestspeedformetalmaterials,andlowconsumptionandenvironmentalprotection.Ithasbeenwidelyusedinthethermalprocessing,heatprocessing,thermalassembly,weldingandsmeltingofmetalmaterials.Itcannotonlyheattheworkparts,butalsoheattheworkparts;deepheattransmissionofworkparts,butalsoonlythesurfaceandsurface;notonlydirectlyheatmetalmaterials,butalsoindirectheatingofnon-metallicmaterials,etc.Therefore,theinductionheatingtechnologywillbemoreandmorewidelyused.Basicprinciple:puttheworkpieceintothesensor(coil),whenthesensorintoacertainfrequencyofalternatingcurrent,thealternatingmagneticfieldisgeneratedaround.Theelectromagneticinductionofthealternatingmagneticfieldcausesaclosedinductioncurrent──vortexintheworkpiece.Thedistributionoftheinductioncurrentontheworkpiececrosssectionisnotuniform,andtheworkpiecesurfacecurrentdensityisveryhigh,whichgraduallydecreasesinward.Thisphenomenoniscalledtheskincollectingeffect.Theelectricenergyofthehigh-densitycurrentonthesurfacelayeroftheworkpieceisconvertedintoheatenergy,raisingthetemperatureonthesurfacelayer,thatis,realizingthesurfaceheating.Thehigherthecurrentfrequency,thegreaterthedifferenceincurrentdensitybetweenthesurfaceandtheworkpiece,andthethinnertheheatinglayer.Surfacequenchingcanbeachievedbyrapidcoolingafterthetemperatureoftheheatinglayerexceedsthecriticalpointtemperatureofthesteel.Therecentdevelopmentofinductionheatingtechnology:theindustrialapplicationofinductionheatinginChinastartedinthe1950s,withtheearliestapplicationinmachinetools,machinemanufacturingandtextilemachinemanufacturing,automobile,tractorindustryandotherdepartments.Atthattime,mostoftheinductionheatingtechnologyatthattimecamefromtheformerSovietUnion,andafewpartcamefromtheCzechRepublic,Belgiumandothercountries.Attheendofthe1950s,Chinahasmadehomemadeelectronictube-typehigh-frequencypowersupplyandmechanicalmedium-frequencygenerator,andvariousequipmentandprocesses,suchasinductionsmelting,inductionheattransmission,quenchingandmediumheating,havebeenappliedinindustry.Afterthe1960s,encouragedbythespiritofself-reliance,variousdepartmentsandenterprisesdevelopedthethyristormedium-frequencypowersupply,improvedtheelectronictubetypehigh-frequencypowersupply,anddesignedandmanufacturedvarioustypesofquenchingmachinetools.ItstypicalstructurehasbeencompiledintothequenchingmachinetoolatlasoftheSixthDesignInstituteoftheoriginalDepartmentofMachinery,withatotalof55kinds.Sincetheopeninguptotheoutsideworld,throughvariouschannelssuchasinvestigationabroad,equipmentimportedandtechnologyintroduced,moderninductionheatingtechnologyinindustrialdevelopedcountrieshasgraduallyenteredvariousdepartmentsofindustryinChina,sothatinductionheating,anenergy-saving,efficient,automatic,highreproducibilityandenvironmentalprotectiontechnology,hasbeenmademoreeffectivelyutilized. Atpresent,theinductionheatingpowersupplymainlyadoptsthyristorinthemediumfrequencysection,andthesuperaudiofrequencybandmainlyadoptsIGBT,whileinthehighfrequencyband,duetothehighconductionlosssuchasSITthermaldeficiencypowersupply,therearemanyspecialrequirementsforpowerdevices,passivedevices,cables,wiring,groundingandshielding.Therefore,thedevelopmentofinductionheatingpowersupplyhighfrequencylocalheatingpowersupply.Consideringthelargecapacityoftheinductionheatingpowersupplyfromtheperspectiveofthecircuit,thelargecapacitytechnologycanbedividedintotwocategories:oneisthedeviceseriesandparallel;theotheristhestringandparallelofmultiplebridgesormultiplepowersources.Intheserialandparallelmodeofdevices,themeanpressureproblemofseriesdevicesandparalleldevicesmustbedealtwithseriously.Duetothediscretizationofthedevicemanufacturingprocessandparameters,thenumberofserialandparalleldevicesislimited,andthemorethenumberofstringandparallel,theworsethereliabilityofthedevice.Theserialandparalleltechnologiesofmultiplepowersourcesareaneffectivemeanstofurtherrecapacitateonthebasisofdeviceserialandparalleltechnology.Withthehelpofreliablepowersupplyserialandparalleltechnology,whenthesinglemachinecapacityisappropriate,thelargecapacitydevicecanbesimplyobtainedthroughthemodeofserialandparalleloperation.Eachsinglemachineisonlyoneunitofthedevice.Inductiveheatingpowersupplyinvertermainlyhasparallelinverterandseriesinverter,Theseriesinverteroutputcanbeequivalenttoavoltagesourcewithalowimpedance,Whenthetwovoltagesourcesareconnectedinparallel,Mutualamplitude,phase,andfrequencywhendifferentorfluctuatingwillcausealargecirculation,Sothatthecurrentoftheinverterpartsisseriouslyuneven,therefore,Itisdifficulttoexpandtheseriesinverter;shuntchopper,TheDClargereactorattheinputoftheinvertercanactasacurrentbufferbetweentheparallelinverters,GivetheAG/DGorDG/DG/DGlinkattheinputsufficienttimetocorrecttheDCcurrentdeviation,Toachievemulti-machineparallelcapacityexpansion,Transistorultra-audio,high-frequencycurrentmostlyadoptstheparallelinverterstructure,Parallelinverteriseasilymodularandhaslargecapacity.Inductionheatingpowerloadobjects,andpowerinverterandloadisanorganicwhole,generallyusematchingtransformerconnectionpowersupplyandloadsensor,highfrequency,superaudiopowersupplymatchingtransformerfromthemagneticmaterialtothewindingstructureisbeingfurtheroptimizedandimproved,atthesametime,fromthecircuittopologycanusethreepassiveelementsinsteadoftwopassiveelements,tocancelthetransformer,toachieveefficientandlowcostmatching. YKinductionpowerserieshasacompleterangeofproducts,focusoninductionheating,wecanunderstandtheinductionheatingprocessmore,welcometoconsult!
  • High-frequency heaters have common faults
  • 2021/10/25
  • Howtooperatethehigh-frequencyheatingequipment Firstofall,weshouldunderstandwhattheindicatorlightonthemaincontrolcabinetpanelofthehigh-frequencyinductionheatingequipmentmeans,suchaspowersupply,work,overcurrent,excessivepressure,waterpressure,watertemperature,andlackofequalprotectionfunctions.Powersupply:whentheredlightison,theequipmententersthewaitingworkingstate,andwhenthegreenlightison,theequipmentisoperatingnormally. First,Overcurrent:thereareseveralsituationsgenerallyover: 1.Shortcircuitbetweensensor.Sensorinductanceistoolarge; *Equipmentcircuitboardisdamp; *.Baddriveboard; *TheIGBTmoduleisbad; *.Transformerignitionandotherfaultcausesovercurrent. Ii.Overpressure: *Highgridvoltage(generalindustrialpowerrangebetween360-420V); *Equipmentcircuitboardisbroken(thevoltagestabilizingdiodeneedstobereplaced). Three,waterpressure: *Insufficientpumppressure(shaftwearcausedbylongpumpoperation); *Thewaterpressuremeterisbroken. Iv.Watertemperature: *Highwatertemperature(generallysettemperatureis45degrees); *Coolingwaterpipeisblocked. Fiveshortphase: *Three-phaseincominglinelacksphase; *Thephaseprotectioncircuitboardisbad.
  • High-frequency brazing machine for correct repair and maintenance
  • 2021/10/25
  • Correctmaintenanceandmaintenanceofhighfrequencybrazingmachinecanensuregoodworkingperformanceandlonglife.Specificmaintenanceandmaintenanceofhighfrequencybrazingmachineisasfollows: 1.Aftertheworkofeachshift,removetheequipment:theairguntoblowdrythebeads,removethedustanddebrisontheplatform,andensurethattheequipmentiscleanandtidy. 2.Watercoolingrequirements:watercoolingisveryimportanttotheinductionheatingequipment,andthewaterqualityispoor,whichwillcauserustandscaleintheequipment.Pipelineblockage,willdirectlycausedamagetotheequipment,andcannotworknormally. 3.Itisnotstrictlyheatedwhenthecoilisnotconnectedtowater,otherwisethecoilmayburnout.Thepowersupplyalsoburnsoutduetotheemptyload. 4.Recommendedcoolingwateris:distilledwater--softeningwater--purewater--filteredtapwater. 5.Noprohibitedcoolingwater:seawater.salinewater.Unfilteredriverwaterandwellwater. 6.Recommendedwatersupplymethod:closedcirculatingwatersupply+water-cooledbutheatexchanger. 7.Inputvoltagethree-phase380V(three-phasefive-linepowersupply). 8.Afterthepowersupply,thepowersupplyisprohibited.Allinputandoutputjointsofthetransformertoavoidsafetyaccidents. 9.Whenrepairingtheequipment,theairswitchandtheexternalmasterswitchmustbeturnedoff,andtheshutdownofthewaterequipmentshouldavoidputtingtheequipmentinthesunexposure,rain,wetandotherenvironment. 10.Maintenancemaintenanceshallbecarriedoutbyprofessionalpersonnel. 11.Whennotturnonthecontrolbox,donotturnonthepowersupplytoavoidsafetyaccidents. 12.Whentheworkisover,turnoffthepowersupplyofthecontrolboxfirst,andthenstopthewaterafter15minutestoavoiddamagetothepowersupply. YKinductionpowerserieshasacompleterangeofproducts,focusoninductionheating,wecanunderstandtheinductionheatingprocessmore,welcometoconsult!
  • Maintenance and maintenance precautions of medium-frequency smelting furnace
  • 2021/10/25
  • Thefollowingaretheinspectionstepsthatmustbeperformeddaily,oneweekorhalfamonth: 1.Forthebetteruseofthemachinewhenworking,itisnecessary: (1)ObservethetemperatureofthethyristorandRCprotectionresistanceandtheoperatingtemperatureoftheuniformpiezoresistancewithatemperaturegun.Thetemperaturemeasurementtimeisdividedintothreestages:thefirsttemperaturemeasurementisthatwhenthemachineisrunningthefirststeelwaterfurnace,aboutathirdofthepowersupplyisturnedon,andthetemperatureismeasuredafterabout5to10minutes.Thesecondtimewasaboutwhenthestovewasnearlyfull.Themeltingjunctionwasthenmeasuredforathirdtime Thetemperatureatthebeam,whichtodayisthelastfurnaceoffullpower.Ofcourse,inordertodetectandsolveproblemsintime,allthreetemperaturemeasurementsneedtoberecorded. (2)Checkthecablescrewsforlooseningeveryday. (3)Beforestartingeveryday,thepowerpumpandfurnacepumpmustbeturnedon.Thewaterpressureinthepowersupplycabinetis1.5to1.7kgandthatinthefurnaceis1.5to2kg (4)Keepthefurnacewatercablecleanwithoutirondebrisandmetalobjects. 2.Beforeoperatingtheequipment,thewaterpumpmustbeopened10minutesinadvancetoseewhetherthereisanywaterleakage.Ifthewaterleakageisfound,pleasetreatitimmediately,soasnottoaffecttheproduction. 3.IfthemachinedetectsanabnormalSCRtemperature,checkthecauseimmediatelytocheckifthepipeisfolded,insufficientwaterflowandheating,ordirtblockageintheSCRsleeve. 4.IfyoufindthattheresistancetemperatureoftherectifiedRCprotectionissignificantlydifferentfromotherresistors,immediatelycheckwhetherthecapacitorisopenordamagedisdamaged.Usually,thereactormakesahumwhenturnedon,andhasalittlejitter. 5.Duringinspectionandmaintenance,payattentiontothefollowing: (1)Whetherthelineslotabovetheinverterresistancecapacitorprotectionisdroppedtoavoidshortcircuit,noinductiveresistanceandburntheKKpipe.Ifitisfound,youcanknotitimmediately. (2)Thescrewsandwaterclipsoftheequipmentshallbetightenedonceaweektoavoiddamagetotheequipmentduetofallingorloosening. (3)Observewhetherthehydraulicoilisinsufficientonceaweek,andusuallyatleast80%oftheoilmustbemaintained. (4)Thewaterqualityofsomemanufacturersvariesfromplacetoplace,pleasedoagoodjobofwhetherthewaterdistributorinthemediumfrequencypowercabinetrot.Ifserious,arrangeasetofwaterdistributortoreplaceandremoveonthemachineafterwelding.Thiswillseriouslyaffecttheproductionprogressandcauseunnecessarytimeloss.Usually,theopenwatersystemchangesthewaterdistributorevery3months.Ifthesystemisturnedoff,tryreplacingiteverysixmonthstooneyear. 6Usually,whencleaningthesleeveisrecycledwith20%dilutehydrochloricacidfor10to15min.Usually,afterwashing,100%watermustbeusedonceanddriedwithcompressedairbeforeusetopreventhydrochloricacidfromrotthesleeve. 7.Hydraulicmaintenancepoints:Whenusinghydraulicoil,payattentiontotheoilcleanlinessandoilquantity.Usually,thehydraulicoilmustbereplacedeverysixmonthsandthefiltercleanedonceamonth.Notethattherearetwofiltersinthehydraulicstation.Donotletitworkatthebottomofthehydraulicstation.Itmustbeplacedonashelfinthehydraulicstationtopreventironchipsinthestationfromenteringthehydraulicpumpanddamagethepump. YKinductionpowerserieshasacompleterangeofproducts,focusingoninductionheating, Weknowmoreabouttheinductionheatingprocess,welcometoconsult!

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