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Reasons for Dead Lamp in LED Bead Welding Process
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- Time of issue:2019-07-16 08:48
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(Summary description)Intheprocessofproduction,wealwaysencounterthephenomenonthatone,oneorseveralbeadscan'tbelightedwhenwetestsomebeadsafterstickingtheboard.Inviewofthisphenomenon,thispapermakesasummary: Deadlampinweldingprocess 1.Commonweldingmethodscanbedividedintoelectricsoldering,heatingplatformweldingandreflowwelding. A,solderingironweldingisthemostcommon,suchassamplemaking,maintenance,becausemostoftheexistingmanufacturersinordertosavecosts,thepurchaseofsolderingironismostlyslightlyunqualifiedproducts,mostlygroundedbadly,thereisleakage.Intheprocessofwelding,thisisequivalenttotheleakageofsolderingirontip-weldedLED-humanbody-earthformaloop.Thatistosay,itistensoftimes-hundredsoftimesthevoltagethatthebulbbears,whichisaddedtothetopoftheLEDbulb,andburnsitoutinstantaneously.Note:Thesituationofelectrostatictapeconnectionwillbemoreserious,becausewhenthebodyisconnectedwiththeelectrostatictape,theresistancetoformacircuittothegroundwillbesmaller,andthecurrentfromthebodytothelampbeadswillbelarger.Thisisalsotheproblemthatmanypeoplesaythattherearestillsomanylampbeadsdamagedwithelectrostatictape. B.Deadlampcausedbyweldingofheatingplatform.Becauseofthecontinuoussamplelistoflampsandlanterns,mostenterprisesinordertomeettheneedsofsmallbatchesandsamplelist.Becauseoftheadvantagesoflowcostofequipment,simplestructureandoperation,heatingplatformhasbecomethebestproductiontool.However,duetotheuseenvironment(e.g.localtemperaturestoragewithfans).Intheunsteadyproblem)andthecontrolofweldingoperator'sproficiencyandweldingspeedhavebecomethemajorproblemofdeadlight.Inaddition,thereisthegroundingofheatingplatformequipment. C.Reflowweldingisgenerallythemostreliablemodeofproduction,suitableformassproductionandprocessing.Ifimproperoperation,itwillcausemoreseriousdeadlightconsequences,suchasunreasonabletemperatureadjustment,poormachinegroundingandsoon. 2.Improperstoragecausesdeadlights: Thiskindofproblemisthemostcommon.Becauseofthelackofattentiontomoisture-proofafterunpacking,thesealingglueoflampbeadsismostlymadeofsilicagel,whichhascertainwaterabsorptioncharacteristics.Afterdamplampbeadsstickingboard,silicagelwillexpandandshrinkafterhightemperatureweldingprocess.Thedeformationofgoldwire,chipandbracketwillcausethegoldwiretomoveandbreak.ItissuggestedthattheLEDshouldbestoredinadryandventilatedenvironmentwithastoragetemperatureof-40-+100Candarelativehumidityoflessthan85%.TheLEDshouldbeusedwithinthreemonthsofitsoriginalpackagingconditiontoavoidtherustofthebracket.WhenthepackagingbagoftheLEDisopened,itshouldbeusedassoonaspossibleandthestoragetemperatureshouldbekeptatthistime.Therelativehumidityisbelow60%at5-30C. 3.Chemicalcleaning: DonotuseunknownchemicalliquidtocleantheLED,becauseitmaydamagethesurfaceoftheLEDcolloidandevencausecolloidcracks.Ifnecessary,cleantheLEDwithalcoholcottonswabundernormaltemperatureandventilationenvironment.Thebesttimeiscontrolledinoneminuteofwind. 4.Deformationcausesdeadlight: Becausepartofthelampboardisdeformed,theoperatorwillgotoshaping.Becausetheplateisdeformed,theabovelampbeadsarealsodeformedtogether,breakingthegoldwireandcausingthelampnottoturnon.Itissuggestedthattheplatewiththistypeshouldbeshapingbeforeproduction.Thelongeronehasbeenassembledandmovedinproductionandmayalsocausedeformationandbreakageofgoldwires.Thereisalsostacking,theproductionprocessforconvenience,thelampboardwillbestackedatwill,becauseofgravity,thelowerlampbeadswillbedeformedbyforce,damagethegoldwire. 5.Heatdissipationstructure,powersupplyandlampboarddonotmatch: Duetotheunreasonabledesignorselectionofpowersupply,thepowersupplyexceedsthemaximumlimitthatLEDcanwithstand(supercurrent,instantaneousimpact);irrationalheatdissipationstructureoflampswillcausedeadlightandprematurelightfailure. 6.PlantGrounding: Itisnecessarytocheckwhetherthefactory'sgroundingwireisgoodornot. 7.Electrostatic: StaticelectricitycancausethefailureofLEDfunction.ItissuggestedtopreventESDfromdamagingtheLED. A.Operatorsmustwearanti-statichandringsandgloveswhentestingandassemblingLED. B.Weldingequipmentandtestingequipment,workingtable,storagerack,etc.mustbewellgrounded. C.UseionblowertoeliminatestaticelectricitycausedbyfrictionduringstorageandassemblyofLED. D.Anti-staticcartridgeisusedforLEDcartridgeandelectrostaticbagisusedforpackaging. E.Don'tbefluky,justtouchtheLED. TheabnormalphenomenaofLEDdamagedbyESDareasfollows: A.Reverseleakage,lightwillcauseadecreaseinbrightness,seriouslightsdonotturnon. B.Theforwardvoltagedecreases.LEDcannotemitlightwhendrivenbylowcurrent. 24-hourhotline:15999793358(Weixinsamenumber)QQ:1780018226 Tel:0769-87285383-804 Fax:0769-87285383 Mailbox:ycw@taimingled.com Address:No.9TengdaRoad,TengdaIndustrialPark,ZhangmuTown,DongguanCity,GuangdongProvince
Reasons for Dead Lamp in LED Bead Welding Process
(Summary description)Intheprocessofproduction,wealwaysencounterthephenomenonthatone,oneorseveralbeadscan'tbelightedwhenwetestsomebeadsafterstickingtheboard.Inviewofthisphenomenon,thispapermakesasummary: Deadlampinweldingprocess 1.Commonweldingmethodscanbedividedintoelectricsoldering,heatingplatformweldingandreflowwelding. A,solderingironweldingisthemostcommon,suchassamplemaking,maintenance,becausemostoftheexistingmanufacturersinordertosavecosts,thepurchaseofsolderingironismostlyslightlyunqualifiedproducts,mostlygroundedbadly,thereisleakage.Intheprocessofwelding,thisisequivalenttotheleakageofsolderingirontip-weldedLED-humanbody-earthformaloop.Thatistosay,itistensoftimes-hundredsoftimesthevoltagethatthebulbbears,whichisaddedtothetopoftheLEDbulb,andburnsitoutinstantaneously.Note:Thesituationofelectrostatictapeconnectionwillbemoreserious,becausewhenthebodyisconnectedwiththeelectrostatictape,theresistancetoformacircuittothegroundwillbesmaller,andthecurrentfromthebodytothelampbeadswillbelarger.Thisisalsotheproblemthatmanypeoplesaythattherearestillsomanylampbeadsdamagedwithelectrostatictape. B.Deadlampcausedbyweldingofheatingplatform.Becauseofthecontinuoussamplelistoflampsandlanterns,mostenterprisesinordertomeettheneedsofsmallbatchesandsamplelist.Becauseoftheadvantagesoflowcostofequipment,simplestructureandoperation,heatingplatformhasbecomethebestproductiontool.However,duetotheuseenvironment(e.g.localtemperaturestoragewithfans).Intheunsteadyproblem)andthecontrolofweldingoperator'sproficiencyandweldingspeedhavebecomethemajorproblemofdeadlight.Inaddition,thereisthegroundingofheatingplatformequipment. C.Reflowweldingisgenerallythemostreliablemodeofproduction,suitableformassproductionandprocessing.Ifimproperoperation,itwillcausemoreseriousdeadlightconsequences,suchasunreasonabletemperatureadjustment,poormachinegroundingandsoon. 2.Improperstoragecausesdeadlights: Thiskindofproblemisthemostcommon.Becauseofthelackofattentiontomoisture-proofafterunpacking,thesealingglueoflampbeadsismostlymadeofsilicagel,whichhascertainwaterabsorptioncharacteristics.Afterdamplampbeadsstickingboard,silicagelwillexpandandshrinkafterhightemperatureweldingprocess.Thedeformationofgoldwire,chipandbracketwillcausethegoldwiretomoveandbreak.ItissuggestedthattheLEDshouldbestoredinadryandventilatedenvironmentwithastoragetemperatureof-40-+100Candarelativehumidityoflessthan85%.TheLEDshouldbeusedwithinthreemonthsofitsoriginalpackagingconditiontoavoidtherustofthebracket.WhenthepackagingbagoftheLEDisopened,itshouldbeusedassoonaspossibleandthestoragetemperatureshouldbekeptatthistime.Therelativehumidityisbelow60%at5-30C. 3.Chemicalcleaning: DonotuseunknownchemicalliquidtocleantheLED,becauseitmaydamagethesurfaceoftheLEDcolloidandevencausecolloidcracks.Ifnecessary,cleantheLEDwithalcoholcottonswabundernormaltemperatureandventilationenvironment.Thebesttimeiscontrolledinoneminuteofwind. 4.Deformationcausesdeadlight: Becausepartofthelampboardisdeformed,theoperatorwillgotoshaping.Becausetheplateisdeformed,theabovelampbeadsarealsodeformedtogether,breakingthegoldwireandcausingthelampnottoturnon.Itissuggestedthattheplatewiththistypeshouldbeshapingbeforeproduction.Thelongeronehasbeenassembledandmovedinproductionandmayalsocausedeformationandbreakageofgoldwires.Thereisalsostacking,theproductionprocessforconvenience,thelampboardwillbestackedatwill,becauseofgravity,thelowerlampbeadswillbedeformedbyforce,damagethegoldwire. 5.Heatdissipationstructure,powersupplyandlampboarddonotmatch: Duetotheunreasonabledesignorselectionofpowersupply,thepowersupplyexceedsthemaximumlimitthatLEDcanwithstand(supercurrent,instantaneousimpact);irrationalheatdissipationstructureoflampswillcausedeadlightandprematurelightfailure. 6.PlantGrounding: Itisnecessarytocheckwhetherthefactory'sgroundingwireisgoodornot. 7.Electrostatic: StaticelectricitycancausethefailureofLEDfunction.ItissuggestedtopreventESDfromdamagingtheLED. A.Operatorsmustwearanti-statichandringsandgloveswhentestingandassemblingLED. B.Weldingequipmentandtestingequipment,workingtable,storagerack,etc.mustbewellgrounded. C.UseionblowertoeliminatestaticelectricitycausedbyfrictionduringstorageandassemblyofLED. D.Anti-staticcartridgeisusedforLEDcartridgeandelectrostaticbagisusedforpackaging. E.Don'tbefluky,justtouchtheLED. TheabnormalphenomenaofLEDdamagedbyESDareasfollows: A.Reverseleakage,lightwillcauseadecreaseinbrightness,seriouslightsdonotturnon. B.Theforwardvoltagedecreases.LEDcannotemitlightwhendrivenbylowcurrent. 24-hourhotline:15999793358(Weixinsamenumber)QQ:1780018226 Tel:0769-87285383-804 Fax:0769-87285383 Mailbox:ycw@taimingled.com Address:No.9TengdaRoad,TengdaIndustrialPark,ZhangmuTown,DongguanCity,GuangdongProvince
- Categories:Industry News
- Author:
- Origin:
- Time of issue:2019-07-16 08:48
- Views:
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通用底部
-
About us
- Company profile Honor Plant
-
Products
- SMD LED Digital tube Triode ......
-
Talent
- Idea Recruitment
Service hotline

Copyright © Dongguan Taiming Photoelectric Technology Co., Ltd. All Rights Reserved. 粤ICP备15044056号-2
