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FastenerManufactureProcessWelcometoBossardSeminar©BossardCSXLSurfaceTreatmentHeatTreatmentThreadRollingColdHead/HotForgingRawMaterialPackingInspectionFastenerManufactureProcess如材料为不锈钢,到此步骤即可©BossardCSXLRawMaterial©BossardCSXLRawMaterialDesignatedareafordifferenttypesofsteel©BossardCSXLTypesofsteelindicatedbycolourRawMaterial©BossardCSXLWireMaterialControl:-Wirediameter-Generalaspect-Hardness-Hardenability-UTS-DecarbonRawMaterial©BossardCSXLRawMaterial©BossardCSXLPhosphatingbathRawMaterialBathscontrolRegularcleaning©BossardCSXLPhosphatedwires©BossardCSXLWirecalibrationRawMaterial©BossardCSXL普通螺钉三角头自攻螺钉©BossardCSXLColdHeading/HotForging©BossardCSXLHexHeadCapScrewForgingSequence–4StnCUTOFFSTN1STSTN2NDSTN3RDSTN4THSTNColdHeading©BossardCSXL©BossardCSXL©BossardCSXLColdHeading©BossardCSXL©BossardCSXLColdHeading©BossardCSXLColdHeading©BossardCSXLInprocesscontrolColdHeading©BossardCSXLHotForging©BossardCSXLHotforgingBarsheatingHotForging©BossardCSXLHotForgingOver25mmDiameter©BossardCSXLThreadRolling©BossardCSXLTHREADSROLLINGAPROCESSOFFORMINGTHREADSWITHOUTREMOVINGTHEMATERIALFLATTHREADROLLINGPLANETRYYTHREADROLLINGCIRCULARTHREADROLLINGSEGMENTALCIRCULARTHREADROLLINGThreadRolling©BossardCSXL1Flatrollingdies2Segmentalrotaryrollingdies3Tworollsonesupportingledge4ThreerollsThreadRolling©BossardCSXLFLATTHREADROLLINGSTATIONARYDIEMOVINGDIEBEFOREAFTERFormoderateproduction,CG1,2,4(partly),5,9,10&11,1290%productsfromcatalogueThreadRolling©BossardCSXL©BossardCSXLCIRCULARTHREADROLLINGCIRCULARROLLINGDIE2NOS.Lowproductionrate,suitableforOddheadshapeCG4(e.g.BN253,256,276,278,258&aboveM24&criticalautoparts)ThreadRolling©BossardCSXLThreadrollingafterheattreatmentHorizontalthreadrollingismainlyusedtoformthreadafterheattreatment,processisveryprecisebutslowandnotfitforlargequantitiesThreadRolling©BossardCSXL©BossardCSXLSEGMENTALCIRCULARTHREADROLLINGCIRCULARROLLINGDIE2NOS.STATIONARYDIEROTATINGDIE3TO4PIECESATATIMEForM/cscrews,CG5ThreadRolling©BossardCSXLPlanetaryThreadrolling©BossardCSXLThreadrollingSetupthreadrolling:5samplesarecheckedbyQC©BossardCSXLIn-processcontrol5samples/15mn(Norecord)Recordedvalues:every1hour(min-max)©BossardCSXLHeatTreatment©BossardCSXLLPSHEATTREATMENTACOMBINATIONOFHEATING&COOLINGOPERATIONSTOOBTAINDESIREDPROPERTIESHARDENING–HEATING&QUENCHINGTEMPERINGHeatTreatment©BossardCSXLHEATINGHEATINGTHEMATERIALABOVEAUSTENISATIONTEMPERATURE&SOAKINGASPERCROSSSECTIONQUENCHINGRAPIDCOOLINGOFAUSTENISEDMATL.?IMMERSINGINOILORWATERMARTENSITICTRANSFORMATIONRESULTINGINTOINTERNALSTRESSESHeatTreatmentFor8.8andabove820to900DegreeC©BossardCSXLLPSTEMPERINGHeatingHardenedmaterialtospecifictemp.muchbelowaustenisationtemp.forspecificdesiredproperties?ImmediatelyafterQuenchingREDUCESINTERNALSTRESSES&ALSOREDUCESHARDNESSHEATTREATMENTPROCESSFOR8.8&ABOVE450±10DegreeC©BossardCSXLLPSDEGREASING&WASHINGHEATINGINFURNACEOILQUENCHINGDEGREASING&WASHINGTEMPERINGQUENCHINGINCUTTINGOILFORTHERMALBLACK&RUSTPREVENTIVEOILDRYMATERIALPLATINGLINEPHOSPHATINGAllOtherCoatingsHEATTREATMENTPROCESSFLOWCHART©BossardCSXLHeatTreatmentHeatTreatmentEquipment©BossardCSXLHeatingforquenchingHeatTreatment©BossardCSXLHeatTreatmentQuenching(OilorWater)TemperingHeatTreatment©BossardCSXLHeattreatment:Longorlargeboltsmustbecarefullyhandled©BossardCSXLHeatTreatmentInprocesscontrol:TensiletestProofloadHardness…HeatTreatment©BossardCSXLSurfaceCoating©BossardCSXLAgainstCorrosionSurfaceCoatingZincPlatingProcess电镀工艺MechanicalPlatingProcess机械镀锌工艺DacrometCoatingProcess达克罗工艺HDGProcess热浸锌工艺最小M6,也有M4的最小M12,附着力最好©BossardCSXLDacrometGeometOrDeltatoneZincPlatedHDGMechanicalPlatingSurfaceCoating©BossardCSXLZincPlating+PassivationElectroplatedCoatings1ElectroplatingProcessZincplatingZincPassivation(yellow,blue...)2ChemicalProcessCr(III)Cr(VI)©BossardCSXLElectroplatedCoatings©BossardCSXL1432Coatingprocess:Dacrometcoatingoffasteners2Sand-blasting3Dip-Spincoating4curingat340°C1DegreasingLPS©BossardCSXLMECHANICALPLATINGPlatingBarrel©BossardCSXLGlassBeads-ImpactMediaMECHANICALPLATING©BossardCSXLMECHANICALPLATINGSMALLDRYINGUNITLARGEDRYINGUNIT©BossardCSXLPHOTOGRAPHSOFHOTDIPGALVANIZINGPLANT©BossardCSXLBarsareshotblastedpriortohotdipgalvanization©BossardCSXLPre-heatingpriortoHDG(80to120°)©BossardCSXLHDGLowTemperature(2to3mn)450°C+/-5°C©BossardCSXLThreadtolerance6azbeforeHDG(undersizedthread)Threadtolerance6hafterHDGCapacityHDG:800mmmax©BossardCSXLSpinningafterhotdipgalvanization(2sides)Thickness:60to80micronsHDGbath©BossardCSXLCoolingintowater+passivationCr3+(Approx1micron)Corrosionresistance:450hours(redrust)©BossardCSXLAllthreadsaretestedwithanut©BossardCSXLFinalInspection©BossardCSXLSamplingforfinalinspectionFinalInspection©BossardCSXLBreakingtorquetestFinalInspection©BossardCSXLPackaging©BossardCSXLThelastprocessandreadyfordeliveryPackaging©BossardCSXLThankyou