HalnnSuperhardCBNinsertshelpsimproveefficiencyinrough turningprocessofRollsofdifferentMaterials
、Advantagesandcaseparametersofroughturningofinfinitelychilledcast ironrollerwithHalnnsuperhardCBNinserts:
一
Thesurfaceofinfinitechilledcastironiswhitelayer,butthereisnoobvious boundarybetweenwhitelayerandgraylayer,rollsurfacehardnessHS≥65,Halnn superhardrecommendsBN-K1gradeforroughturningofinfinitechilledcastironroll, theadvantageliesin:highhardness,goodwearresistance,largemarginofrough turninginfinitechilledcastironrollblank,encounterwhitemouth,hardspotsand othercastingdefectsdonotneedtoreducecuttingparameterstoprocessAtthesame time,ithashighdurability,whichisseveraltimesanddozensoftimeshigherthan thatofceramictoolsandcementedcarbidetools.
Thespecificcaseparametersareasfollows:
Rollsname:narrowstriproll.
Rollshardness:HSD67.
Toolmaterial:BN-K1RNMN200800
Cuttingparameters:Vc=56-76m/min
Tooldurability:60min
AdvantagesandcaseparametersofroughturningHighSpeedSteelRoller
withHalnnSuperhardCBNinserts
Inroughturninghigh-speedsteelrollengineering,thepassismoredifficultto process,mainlybecausethehardnessistoohigh,itshardnessisclosetoordinary cementedcarbidecuttingtools,onlytheselectionofsuitablehigh-hardnesstoolscan ensurethenormalmachiningofhigh-speedsteelrollpass.
HalnnSuperhardrecommendsBN-S20gradetoprocesshigh-speedsteelroll pass,whichhastheadvantagesofexcellenthightemperatureresistanceandimpact toughness,highcuttingefficiencyandhighquality
Thespecificcaseparametersareasfollows:
Rollshardness:HSD90
insertsmodel:BN-S20RCMX120700
Cuttingparameters:Fr=0.2mm/r,Vc=35m/min.
Processingmethod:drycutting.
Toollife:25slots/inserts(2timesasmuchasacertainbrandCBNinserts)
AdvantagesandcaseparametersofroughturningcementedCarbideRoller withHalnnSuperhardCBNinserts
Thebendingstrengthofcementedcarbiderollscanreachmorethan2200MPa, RockwellhardnessHRA78~90,someevenhigherthanHRA90,basicallyachieving fulldensity(relativedensitygreaterthanorequalto99%)HalnnSuperhard
recommendsHLCBNgradetoprocesscementedcarbide,whichhastheadvantagesof highhardness,highwearresistance,normalprocessingat1200℃,noseverewear andsoon.
Thespecificcaseparametersareasfollows:
Processingposition:outercircle.
Choosetheinserts:HLCBNRNMN120400
Cuttingparameters:Vc=25m/min,Fr=102mm/r,ap=06mm
Comparativeadvantage:thetoollifeofHLCBNis5timeslongerthanthatofan importedPCBNinserts.
四、
Advantagesandcaseparametersofrollafterroughturningandrepairof HalnnsuperhardCBNinserts：
Afterworkingforalongtime,therollwillappearcracks,blocksandother failureforms,becausetherollisexpensive,thedirectscrappingprocessingcostistoo high,andaffectstheprocessingefficiencySurfacingwelding/sprayweldingand othermethodsareoftenusedtorepairtheroll,soastomeetthedifferentperformance requirementsoftheroll,therollisrepairedandthenprocessed,whichnotonlydoes notaffecttheprocessingefficiencyoftherollingmill,butalsoreducestheprocessing costFortherepairedrollHalnnsuperhard,therearemanykindsofCBNinserts
Rollhardness:HRC84.5-85.materialsrecommended,suchasBN-S300whenthesurfacequalityoftherollishigh beforemachining,BN-S20iftherearecracksorfallingblocksonthemachined surface,andBN-K1ifthemachinedsurfaceismoreseriousandtherearestrong discontinuouscuttingconditions.
Thespecificcaseparametersareasfollows:
Rollsmaterial:highspeedsteel
Rollshardness:HRC63
Toolmaterial:BN-S300
Cuttingparameters:Vc=26m/min,ap=2mm,f=0.5mm/r.
Tooldurability:60min