Yuav ua li cas kho 5 Common Laser Welding Defects & Solutions

Nov 01, 2022 Tso lus

Nrog rau qhov zoo ntawm kev ua haujlwm siab, siab precision, zoo nyhuv, thiab yooj yim automation kev koom ua ke, laser vuam yog dav siv nyob rau hauv ntau yam industries thiab plays lub luag hauj lwm tseem ceeb nyob rau hauv industrial ntau lawm thiab manufacturing, nrog rau cov tub rog, kev kho mob, aerospace, 3C nws pib qhov chaw, mechanical sheet hlau, tshiab zog, chav dej kho vajtse, thiab lwm yam industries.

 

King's Laser 1000W 1500W handheld fiber laser welding machine for stainless steel sheet metal

1000W Handheld Fiber Laser Vuam Tshuab

Lub tes tuav fiber ntau laser vuam tshuab yog lub cim tshiab ntawm cov khoom siv laser vuam, siv hom tshiab fiber ntau laser kom paub qhov sib sib zog nqus nqus vuam, qhov chaw vuam, taub qab vuam, foob vuam, vuam vuam, thiab lwm yam Yog tias koj xav kom tsis txhob ua haujlwm yuam kev, koj tuaj yeem tshawb xyuas peb cov lus qhia ntawmyuav ua li cas siv lub handheld laser vuam tshuab.

 

Txawm li cas los xij, txhua txoj kev ua haujlwm yam tsis muaj kev nkag siab zoo ntawm nws cov ntsiab lus thiab cov txheej txheem yuav ua rau qee yam tsis xws luag lossis cov khoom tsis raug, thiab laser vuam tsis muaj qhov tshwj xeeb. Tsuas yog thaum peb muaj kev nkag siab zoo ntawm cov kev tsis zoo no thiab kawm paub yuav ua li cas zam lawv, peb tuaj yeem muab kev ua si zoo dua rau tus nqi ntawm laser vuam thiab cov txheej txheem cov khoom uas zoo nkauj tsos thiab zoo. Los ntawm kev paub dhau los ntev -, peb tau sau qee cov kev daws teeb meem rau kev siv vuam tsis zoo rau koj siv!

 

1. Ncua tseg

Cov kab nrib pleb uas tsim nyob rau hauv laser nruam vuam yog feem ntau kub tawg, xws li siv lead ua tawg, liquefaction tawg, thiab lwm yam. Lub ntsiab yog vim li cas lub weld tsim ib tug loj shrinkage quab yuam ua ntej tag nrho cov solidification. Hlau filling, preheating thiab lwm yam kev ntsuas tuaj yeem txo lossis tshem tawm cov kab nrib pleb, tshwj xeeb tshaj yog thaum ua haujlwmlaser vuam ntawm steel cov ntaub ntawvuas yog rhiab heev rau thermal stress.

 

Hot crack defects in laser continuous welding process

 

Yog xav paub ntxiv txog vim li cas cov kab nrib pleb thiab yuav tiv thaiv lawv li cas, saib pebtawg tsom xam thaum lub sij hawm laser vuam txheej txheem.

 

2. Weld porosity

Porosity yog ib yam ntawm qhov tsis xws luag yooj yim tsim nyob rau hauv laser vuam. Lub pas dej molten ntawm laser vuam yog qhov sib sib zog nqus thiab nqaim, thiab qhov cua txias yog ceev ceev. Cov roj tsim tawm hauv lub pas dej ua kua molten tsis muaj sijhawm txaus kom khiav tawm, uas yooj yim ua rau tsim cov pores. Txawm li cas los xij, laser vuam muaj cua txias ceev, thiab cov porosity generated feem ntau me dua li ib txwm fusion vuam. Ntxuav lub workpiece nto ua ntej vuam tuaj yeem txo qhov kev nyiam ntawm porosity, thiab cov kev taw qhia ntawm tshuab yuav cuam tshuam rau tiam ntawm porosity. Rau kev nkag siab tob txog kev tswj roj, nyeem txog qhovcov nyhuv ntawm shielding roj ntawm fiber ntau laser vuam.

 

Weld porosity and gas pores formation in fiber laser welding molten pool

 

3. Spatter

Lub spatter ua los ntawm laser vuam cuam tshuam rau qhov zoo ntawm qhov chaw vuam thiab yuav ua rau lub ntsej muag ua rau lub ntsej muag puas tsuaj. Splash yog ncaj qha ntsig txog lub zog ceev, thiab nws tuaj yeem raug txo los ntawm kev txo qis vuam zog. Yog tias qhov nkag mus tsis txaus, qhov vuam ceev tuaj yeem raug txo.

 

Heavy welding spatter defect caused by high power density in laser welding

 

4. Txom nyem

Yog tias qhov vuam ceev nrawm dhau, cov kua hlau nyob tom qab ntawm lub qhov me me taw rau qhov chaw vuam tsis tuaj yeem rov xa rov qab rau lub sijhawm, thiab qhov kev txiav tawm yuav raug tsim thaum muaj zog tshwm sim ntawm ob sab ntawm lub vuam. Yog hais tias qhov sib koom ua ke clearance loj heev, lub filling molten hlau yuav raug txo, thiab lub undercut kuj yooj yim tshwm sim. Thaum kawg ntawm laser vuam, yog hais tias lub zog poob lub sij hawm yog ceev heev, lub qhov me me yog ib qho yooj yim mus vau, ua rau ib tug hauv zos undercut. Qhov sib txuam ntawm kev tswj fais fab thiab kev ceev tuaj yeem daws qhov teeb meem ntawm qhov undercut. Precision parameter tuning yog qhov tseem ceeb, raws li tau piav qhia hauv peb phau ntawv qhiaoptimizing fiber ntau laser vuam.

 

Undercut defect on weld seam edge due to fast laser welding speed

 

5. Kaw

Yog tias qhov vuam nrawm nrawm, lub pas dej molten loj thiab dav, cov hlau molten nce, thiab qhov nro ntawm qhov nyuaj yog qhov nyuaj rau kev tuav cov kua hlau hnyav, qhov chaw weld yuav tog, tsim lub cev qhuav dej thiab cov qhov dej. Nyob rau lub sijhawm no, nws yog ib qho tsim nyog yuav tsum tau txo lub zog ceev kom tsim nyog kom tsis txhob tawg ntawm lub pas dej molten. Qhov teeb meem no feem ntau tshwm sim hauv cov hlau teeb; kawm ntxiv rauYuav ua li cas ua kom tiav aluminium alloy weldingyam tsis muaj dab tsi nto.

 

Weld center collapse and pits defect in aluminum alloy laser welding

 

Kev nkag siab zoo ntawm qhov tsis xws luag tsim nyob rau hauv cov txheej txheem laser welding thiab qhov ua rau ntawm qhov tsis xws luag tuaj yeem raug tsom ntau dua los daws qhov teeb meem ntawm qhov txawv txav ntawm vuam seams hauv laser vuam.