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2019-04-23 11:08:00

Factors affecting the life of diamond saw blades

Factorsaffectingtheefficiencyandlifeofdiamondcircularsawbladesaresawingprocessparametersanddiamondparticlesize,concentration,bondhardnessandthelike.Thesawingparametersaresawbladelinespeed,sawingconcentrationandfeedrate.First,thebladelinespeed:Inactualwork,thelinearspeedofthediamondcircularsawbladeislimitedbytheconditionoftheequipment,thequalityofthesawbladeandthenatureofthesawedstone.Fromtheoptimumsawbladelifeandsawingefficiency,thelinearspeedofthesawbladeshouldbeselectedaccordingtothenatureofthedifferentstones.Whensawinggranite,thelinearspeedofthesawbladecanbeselectedfrom25mto35m/s.Forgranitewithhighquartzcontentanddifficulttosaw,thelowerlimitofthebladelinespeedisappropriate.Intheproductionofgranitetiles,thediamondcircularsawbladesusedaresmallerindiameterandcanreachalinespeedof35m/s. Sawingdepth:Sawingdepthisanimportantparameterrelatedtodiamondwear,effectivesawing,bladeforceandthenatureofthestonebeingsawed.Generallyspeaking,whenthelinearspeedofthediamondcircularsawbladeishigh,asmallcuttingdepthshouldbeselected.Fromthecurrenttechnology,thedepthofthesawingdiamondcanbeselectedbetween1mmand10mm.Whensawinggraniteblockswithlarge-diametersawblades,thesawingdepthcanbecontrolledbetween1mmand2mm,andthefeedrateshouldbereducedatthesametime.Whenthelinearspeedofthediamondcircularsawbladeislarge,alargedepthofcutshouldbeselected.However,whentheperformanceofthesawandtheallowablerangeoftoolstrength,thecuttingconcentrationshouldbetakenasmuchaspossibletoimprovethecuttingefficiency.Smalldepthcutsshouldbeusedwhenmachiningsurfacesarerequired.Feedingspeed:Thefeedspeedisthefeedrateofthesawedstone.Itssizeaffectsthesawingrate,theforceonthesawblade,andtheheatdissipationinthesawingarea.Itsvalueshouldbeselectedaccordingtothenatureofthestonebeingsawed.Generallyspeaking,sawingsofterstones,suchasmarble,canincreasethefeedspeedappropriately.Ifthefeedspeedistoolow,itismoreconducivetoimprovingthesawingrate.Thesawingofthefine-grained,relativelyhomogeneousgranitecanincreasethefeedspeedappropriately.Ifthefeedspeedistoolow,thediamondbladeiseasilysmoothed.However,whencuttinggranitewithcoarsegrainstructureandunevenhardness,thefeedspeedshouldbereduced,otherwisethevibrationofthesawbladewillcausethediamondtobreakandreducethesawingrate.Thecuttingspeedofsawinggraniteisgenerallyselectedwithintherangeof9mto12m/min.Second,otherinfluencingfactors: Diamondparticlesize:Commonlyuseddiamondparticlesizeisintherangeof30/35to60/80.Thehardertherockis,thefinerparticlesizeshouldbechosen.Becauseunderthesamepressureconditions,thediamondisfinerandsharper,whichisgoodforcuttingintohardrock.Inaddition,generallylarge-diametersawbladesrequirehighsawingefficiency,andcoarsergranularityshouldbeselected,suchas30/40,40/50;small-diametersawbladesawingefficiencyislow,requiringrocksawingsectiontobesmooth,suitableChooseafinerparticlesize,suchas50/60,60/80.Toolheadconcentration:Theso-calleddiamondconcentrationreferstothedensityofdiamonddistributedintheworkinglayercarcass(ietheweightofdiamondcontainedinaunitarea).The"Specifications"stipulatethatwhentheworkingcarcasscontains4.4caratsofdiamondpercubiccentimeter,itsconcentrationis100%,andwhenitcontains3.3caratsofdiamond,itsconcentrationis75%.Thevolumeconcentrationindicatesthevolumeofdiamondintheagglomerate,andspecifiesthattheconcentrationofthediamondis100%whenitaccountsfor1/4ofthetotalvolume.Increasingthediamondconcentrationisexpectedtoextendthelifeofthesawbladebecauseincreasingtheconcentrationreducestheaveragecuttingforceperdiamond.However,increasingthedepthnecessarilyincreasesthecostofthesawblade,sothereisamosteconomicalconcentration,andthisconcentrationincreasesasthecuttingrateincreases.Third,thehardnessofthecutterbond:Ingeneral,thehigherthehardnessofthebond,thestrongeritswearresistance.Therefore,whensawingarockwithhighabrasiveness,thehardnessofthebondingagentshouldbehigh;whensawingasoftrock,thehardnessofthebondingagentshouldbelow;whensawingahardandhardrock,thehardnessofthebondingagentshouldbemoderate.Fourth,forceeffect,temperatureeffectandwearandtear:diamondcircularsawbladeintheprocessofcuttingstone,willbeaffectedbycentrifugalforce,sawingforce,sawingheatandotheralternatingloads.Thewearandtearofthediamondcircularsawbladeiscausedbytheforceeffectandthetemperatureeffect.1Forceeffect:Duringthesawingprocess,thesawbladeissubjectedtoaxialandtangentialforces.Duetotheforceactinginthecircumferentialdirectionandtheradialdirection,thesawbladeiswavyintheaxialdirectionandisdishedintheradialdirection.Bothofthesedeformationswillresultinunevenrocksections,highwasteofstone,highnoiseduringsawing,andincreasedvibration,resultinginearlydamageofdiamondagglomeratesandreducedsawbladelife.2Temperatureeffect:Thetraditionaltheoryholdsthattheinfluenceoftemperatureonthesawbladeprocessismainlymanifestedintwoaspects:oneistocausegraphitizationofdiamondintheagglomerate;theotheristocausethethermalforceofdiamondandthecarcasstocausethediamondparticlestoprematurely.Falloff.Newresearchshowsthattheheatgeneratedduringthecuttingprocessismainlyagglomerated.Thearctemperatu

2019-04-23 11:07:00

Development trend and prospect of synthetic diamond industry

WiththematurityofsyntheticdiamondtechnologyandtherapiddevelopmentofChina'seconomy,Chinahasaccumulatedandimproveddiamondtoolmanufacturingtechnologyandhasstrongmanufacturingcapabilities.DuetothehugeadvantagesofChineseenterprisesinlaborcosts,coupledwiththetrendofcatchingupwithtechnologyresearchanddevelopment,Chineseenterpriseshaveobviousadvantagesinproductcostperformance.Withtherapidgrowthofmarketdemand,diamondtoolcompaniesfromallovertheworldhavelaunched,andanumberofadvantageousenterpriseswithinternationalcompetitivestrengthhaveemerged.Chinahasbecomeanimportantdiamondtoolproducerintheworld,anapplicationcountryandanexportingcountry,withanannualoutputvalueofmorethan10billionyuan. 1,theapplicationofsyntheticdiamondintheemergingindustryisexpectedtofurtherexpand.Withthecontinuousimprovementofsyntheticdiamondgrade,itsexcellentperformanceisexpectedtobemorewidelyusedinhigh-techfields,suchasaerospaceinstrumentbearings,radarwaveguides,Processingofprecisioninstrumentssuchasopticalcomponentsandhigh-energypyrotechnics;canbeusedforcutting,grinding,satellitesolarpanelsandotherhigh-efficiencyprecisionprocessingofsinglecrystalsiliconandpolycrystallinesilicon0.1-0.2mmthicknesssheets;canbeusedforlarge-scaleintegratedcircuitssuchascomputerchipsFineprecisioncutting,slotting,backsidethinning,nano-diamondpolishing,etc.;high-puritylargesinglecrystaldiamondcanalsobeusedforhigh-strengthopticalwindowsfordynamiccompressiontesting,windowopeningsforsomedevicesinveryenvironmentalenvironments,andresearchcores.Componentsoffusionenergyandsoon.Thedevelopedcountriesintheworldallregardsuperhardmaterialsandproductsincludingsyntheticdiamondsasthedevelopmentfocus.Theresearchandapplicationlevelofsuperhardmaterialsandproductsrepresentthelevelofscientificandtechnologicaldevelopmentofacountrytosomeextent.2,China'ssyntheticdiamondmarket,theproportionofhigh-gradediamondsisrelativelylow,andtheaddedvaluespaceislarge.Atpresent,theoutputvalueofdomesticsuperhardmaterialsandproductsisbetween1:3and1:6.Withthecontinuousgrowthofthemarketscaleofdownstreamsuperhardmaterials,themarketprospectofsuperhardmaterialsisverybroad.Themarketdemandforhigh-gradediamondsaccountsforabout60%to70%ofthetotalmarket.Accordingtothecurrentdomestictechnicallevelofdiamondproducts,theproportionofhigh-gradediamondsislow,only25%to30%,and60%.Incontrasttomarketdemand,thegapis30%to35%.SincetheoveralltechnologyandqualitylevelofChina'sdiamondproductslagbehinddevelopedcountries,morethan90%ofthehigh-endproductsusedinelectronics,automobiles,homeappliances,CNCmachiningandotherindustriesrelyonimports.Therefore,Chinahasalotofroomfordevelopmentinthefieldofhigh-gradesuperhardmaterials.Inrecentyears,theapplicationtargetsandapplicationfieldsofhumandiamondshavebeenexpanding,andthemarketdemandhasbecomemorevigorous,showingatrendofsustainedandrapidgrowth.3.Inthefuture,diamonddemandwillincreaseandpriceswillrisesteadily.Inthenextfewyears,themarketdemandforsyntheticdiamondinChinacanstillmaintainanaverageannualcompoundgrowthofmorethan15%.Accordingtothestatisticsofindustryassociations,theproductionandsalesvolumeofdomesticsyntheticdiamondsincreasedfrom1.6billioncaratsto5.4billioncaratsfrom2001to2009,withanaverageannualcompoundgrowthof16.4%.Inthenextfewyears,China'ssyntheticdiamondmarketcanstillmaintainanaverageannualgrowthrateofmorethan10%.Itisexpectedthatthedomesticmarketdemandin2012willreach7billioncarats.Withthetechnologicaladvancementofdomesticsyntheticdiamondindustryandtheimprovementofproductquality,China'ssyntheticdiamondproductsaregraduallyrecognizedbyinternationalcustomers.Accordingtothestatisticsofindustryassociations,thenumberofsyntheticdiamondexportsinChinaincreasedfrom153millioncaratsto1.35billioncaratsfrom2001to2008.Thecompoundannualgrowthrateis37%.WiththeproductioncapacityandpriceadvantageofChina'ssyntheticdiamondindustry,China'sexportsofsyntheticdiamondanditsproductswillcontinuetomaintainarapidgrowthtrend.Inshort,withthecontinuousdevelopmentofsyntheticdiamondtechnology,diamondtools,syntheticdiamondsaregraduallyappliedinnewmaterials,newprocesses,newequipmentandChina'sownadvantagesinthesyntheticdiamondindustry,thereisreasontobelievethatChina'ssyntheticdiamondmarketwillcertainlywelcomeinthenextfewyears.Inthegoldenperiodofdevelopment,wewillmaintainahigh-speeddevelopmenttrend.

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