Defocus npaum li cas cuam tshuam rau Laser Beam Zoo thiab Weld Performance hauv 304 Stainless Hlau

Laser thev naus laus zis yog ib qho ntawm plaub qhov kev txiav txim siab ntawm lub xyoo pua 20th nrog rau kev suav, semiconductors, thiab nuclear zog, thiab tam sim no siv thoob plaws kev sib txuas lus kho qhov muag, kev kho mob, kev tshuaj xyuas, thiab cov khoom siv. Tsis pub dhau cov ntaub ntawv ua, laser npav, txiav, drilling, thiab vuam tau tag nrho cov matured rau hauv cov khoom siv txhim khu kev qha. Ntawm lawv, laser vuam tau txais kev pom zoo vim nws muaj qhov zoo meej ntawm TIG thiab tsis kam vuam hauv cov khoom siv hluav taws xob, vuam profile, thiab cov peev txheej automation.

Cov txiaj ntsig tseem ceeb ntawm laser vuam yog:

• me me heevcua sov- thaj tsam cuam tshuam (HAZ)
• Siabtob-rau- dav pivhauv weld
• Siab sib koom ua ke
• Lub zog sib koom ua ke ntawm lossis siab dua niam txiv hlau
• Ib qho yooj yim beam xa los ntawm kev hloov pauv fiber ntau rau automation

Cov chaw laser feem ntau suav nrog CO₂ lasers, disc lasers, Nd:YAG lasers, fiber ntau lasers, thiab diode lasers. Ntawm cov no, covfiber ntau laseryog cov kev taw qhia niaj hnub tshaj plaws, muab:

• Cov hluav taws xob siab - mus rau - kev ua haujlwm kho qhov muag (txog ~ 30%)
• Compact hneev taw
• Tsawg txij nkawm thiab kev pab lub neej ntev
• Muaj zog haum rau vuam stainless hlau thiab aluminium alloys

Covquasi-nruam (QCW) fiber ntau lasertsim los ntawm IPG Photonics sawv cev rau cov chav kawm pem hauv ntej ntawm qhov chaw, xa lub zog siab siab nrog cov mem tes dav txuas mus rau millisecond ntau - zoo sib xws rau hlau vuam thiab micro- vuam ntawm nyias qhov chaw. Txawm hais tias dav saws nyob rau hauv electronics thiab precision vuam, cov txheej txheem qhov rais rau QCW fiber ntau lasers tseem tau txais kev tso cai txwv. Kab lus no tsom mus rau ib qho ntawm cov txheej txheem tseem ceeb tshaj plaws hloov pauv -focal txoj hauj lwm, qhia raws li tus nqi defocus- thiab qhia tau hais tias, los ntawm cov kev sim tswj, yuav ua li cas defocus duab beam zoo, weld tsos, weld nkag, thiab sib koom ua ke lub zog ntawm 304 stainless hlau ncej puab. Rau kev pom dav dav ntawm cov toj roob hauv pes laser vuam, saib peb phau ntawv qhialaser vuam qauv thiab hom.

2.1 Cov khoom siv vuam

A 150 W QCW pulsed fiber ntau laserua qhov chaw vuam rau qhov kev kawm no. Cov neeg sawv cev kev tsis sib xws ntawm cov chav kawm ntawm qhov chaw no yog cov ntsiab lus hauv qab no (cov txiaj ntsig kev lag luam ib txwm muaj; cov ntaub ntawv tiag tiag sib txawv los ntawm tus qauv, teeb tsa, thiab daim ntawv thov - xa mus rau cov ntaub ntawv xa khoom rau cov txiaj ntsig tau lees paub).

Cov lus 1 - Cov lus qhia tshwj xeeb rau 150 W chav kawm QCW pulsed fiber ntau laser (kev lag luam- tus nqi siv tau zoo, tsis lav)

Cov txiaj ntsig tau pom saum toj no yog kev lag luam-cov ntaub ntawv siv tau zoo rau 150 W chav kawm QCW pulsed fiber ntau laser, tsis yog qhov kev lees paub tshwj xeeb ntawm ib qho tshwj xeeb King's Laser unit. Yog xav paub meej meej, thov hu rau info@kingslaser.com lossis mus saib nplooj ntawv King's Laser rau cov qauv tam sim no hauv chav kawm no.

Lub laser ua lub taub hau yog txav mus rau qhov chaw ua haujlwm ntawm X / Y / Z motion platform los ua seam vuam. Tus tswj cov lus tsa suab synchronizes lub taub hau txoj hauj lwm nrog laser firing kom emission pib tsuas yog thaum lub taub hau mus txog ib tug programmed qhov chaw.

Yog xav paub ntxiv txog dab tsi txhais cov chav kawm laser no thiab qhov twg nws siv, saibQCW fiber ntau laser vuam yog dab tsi, kev sib tham dav dav ntawmQCW laser vuam reshaping muaj daim ntaub ntawv, thiab lub hauv pausquasi-nruam fiber ntau laser qhov chaw. Txhawm rau pom lub chaw tsim khoom sawv cev, xa mus rau King's Laser6-axis QCW fiber ntau laser vuam tshuab.

2.2 Cov Khoom Siv & Kev Npaj

Lub hauv paus ntawm qhov kev tshawb fawb no yog304 stainless hlauteem raws li ib tug ncej puab: sab saum toj daim ntawv 0.2 hli tuab, hauv qab daim ntawv 0.5 hli tuab, txhua txiav mus rau 100 hli × 50 hli.

Kev npaj saum npoo tau ua tiav nyob rau hauv ob kauj ruam hnyav: thawj acetone, tom qab ntawd isopropanol so, tshem tawm cov roj, oxides, thiab lwm yam kab mob uas tuaj yeem cuam tshuam qhov kev ncaj ncees. Ib qho kev sib koom ua ke siv lub siab sib xws thoob plaws qhov sib koom ua ke kom txo tau qhov kev cuam tshuam ntawm lub ntsej muag. Cov kauj ruam no tseem ceeb vim nws:

• Txhim kho cua sov hloov ntawm ob nplooj ntawv thaum vuam
• Txhawb kev nkag mus zoo ib yam
• Txo qhov kev pheej hmoo ntawm tsis muaj fusion thiab porosity

Rau 304 stainless hlau tshwj xeeb, kev sib koom ua ke ntawm txoj cai tiv thaiv roj nrog rau qhov chaw npaj yog qhov tseem ceeb - saib cov lus qhia ntawmshielding gas xaiv rau stainless hlau vuam. Thiab vim hais tias feem ntau weld defects pib ntawm qhov chaw, ua ntej -weld tu ib leeg tuaj yeem tshem tawm txog li 70% ntawm lawv - tshawb cov ntaub ntawv hauvlaser ntxuav daws 70% ntawm vuam tsis xws luag.

2.3 Kev txiav txim siab ntawm Laser Focal Position

Lub ntsiab yam tseem ceeb uas txiav txim siab qhov tshwm sim ntawm laser vuam cov txiaj ntsig yog lub zog siab tshaj plaws, mem tes dav, thiab tus nqi defocus (qhov sib txawv ntawm qhov chaw focal thiab qhov chaw ua haujlwm). Ntawm cov no, tus nqi defocus yog qhov rhiab tshaj plaws.

Lus txhais - Defocus:Zoo defocus txhais tau hais tias lub focal point nyob saum lub workpiece nto; negative defocus txhais tau hais tias lub focal point nyob hauv qab ntawm qhov chaw.

Txoj kev txhim khu kev qha tshaj plaws los nrhiav qhov chaw focal yog daim duab peb sab stainless hlau calibration txoj kev:

1. Hluav taws xob qis- lub zog laser mem tes (kwv yees li 50 W) ntawm lub phaj stainless hlau; lub ci ci tshaj plaws qhia txog lub dav hlau focal.
2. Muab ib daim duab peb sab stainless hlau thaiv ze ntawm lub dav hlau focal thiab cov kab ntawv txhua ~ 2 hli pib ntawm 0.5 hli. Nyob rau hauv ib lub tshuab kuaj kab mob, txoj kab nqaim tshaj plaws kos npe rau txoj hauj lwm focal.

Beam zoo tau ntsuas nrog beam profiler, laser sojntsuam, thiab beam attenuator. Nrog rau kev sojntsuam pib ntawm qhov chaw focal, lub taub hau ua haujlwm tau tsa hauv 1 hli cov kauj ruam los teeb tsa tus nqi defocus ntawm 0, 1, 2, 3, thiab 4 mm.

Daim duab 1 - Laser beam zoo (spot zog faib) piv rau tus nqi defocus.

• Ntawm 0 mm defocus, laser zog yog concentrated nyob rau hauv nruab nrab ntawm qhov chaw.
• Raws li defocus nce, qhov chaw lub zog faib ua kom zoo dua qub.
• Ntawm 3 mm defocus, qhov kev faib tawm yog qhov sib npaug tshaj plaws.
• Ntawm 4 mm defocus, qhov kev faib pib kis tau thiab poob qhov sib npaug dua.

Hauv kev xyaum, cov ntaub ntawv 3 hli muab kev lag luam zoo tshaj plaws - tawm ntawm qhov chaw loj thiab lub zog siab tshaj plaws rau nyias - daim ntawv vuam.

4.1 Cov nyhuv ntawm Weld Spot Morphology

Lub workpiece tau muab tso rau ntawm qhov chaw focal nrog lub siab tshaj plaws lub zog thiab mem tes dav ramped upward kom txog rau thaum ib tug meej cim tshwm nyob rau sab nraum qab ntawm daim ntawv hauv qab. Hauv qhov kev sim no, lub zog siab tshaj plaws yog 500 W thiab mem tes dav yog 3 ms. Cov kev ntsuas no tau tuav tas li thaum defocus tau sib txawv hauv 1 hli increments; qhov zoo li qhov chaw weld raug kaw ntawm txhua kauj ruam.

Daim duab 2 - Weld chaw zoo li piv rau tus nqi defocus.

Kev soj ntsuam:

• Ntawm 0 - 1 mm defocus, qhov chaw weld yog qhov tsawg tshaj plaws thiab pom pom spatter. Qhov ua rau yog lub zog concentration ntawm qhov chaw nruab nrab, ua rau lub zog loj hauv zos thiab cov khoom ejection.
• Raws li qhov defocus tseem nce ntxiv, qhov chaw weld yuav zoo ib yam thiab spatter ploj, uas ua raws los ntawm cov kab hluav taws xob ntau dua.
• Tshaj li 4 hli defocus, roundness degrades thiab qhov chaw me ntsis me ntsis - tej zaum vim hais tias cov nqaj zog kis tawm ntawm qhov chaw npoo.

Thoob plaws 0 - 3 mm defocus, weld chaw txoj kab uas hla loj hlob los ntawm 0.4 mm mus rau 0.5 mm: loj defocus ua ib tug loj defocus thiab yog li ntawd ib tug loj weld chaw. Ntawm 4 mm defocus qhov chaw txoj kab uas hla poob dua, vim hais tias lub zog ntawm qhov chaw ntug tsis txaus los ua kom tiav cov khoom siv txawm tias qhov chaw loj dua geometrically.

Daim duab 3 - Weld spot diameter piv rau defocus tus nqi.

4.2 Cov nyhuv ntawm Weld Penetration Qhov tob

Hla- ntu tau npaj los ntawm kev txiav raws ntug qhov chaw weld, ua raws li kev sib tsoo ntxhib, sib tsoo zoo, thiab polishing. Lub chaw vuam tau raug tshuaj xyuas thaum polishing, tom qab ntawd etched nrog nitric acid + cawv daws kom pom qhov tob tob ntawm txhua tus nqi defocus.

Kev soj ntsuam:

• Ntawm 0 - 1 mm defocus, nkag mus tob yog qhov siab tshaj plaws, ncav mus rau hauv cov ntawv hauv qab.
• Ntawm 2 - 3 mm defocus, nkag mus tob ua ntiav, ncav cuag tsuas yog ib nrab ntawm cov ntawv hauv qab.
• Ntawm 4 mm defocus, nkag mus sai heev, ncav cuag tsuas yog ib -feem peb ntawm cov ntawv hauv qab.

Daim duab 4 - Weld nkag qhov tob piv rau tus nqi defocus.

4.3 Cov nyhuv ntawm Weld Tensile Strength

Ib qho - qhov chaw tensile lub zog tau ntsuas ntawm lub tshuab ntsuas tensile nrog cov ntawv hauv qab tau kho thiab cov ntawv sab saum toj rub tawm. Txhawm rau kom ntseeg tau qhov tseeb, peb cov qauv raug kuaj ntawm txhua qhov ntsuas qhov ntsuas thiab cov txiaj ntsig tau nruab nrab.

Defocus qhov tseem ceeb ntawm 0, 1, 2, 3, thiab 4 mm ua rau lub zog tensile ntawm7 N, 8 N, 11 N, 15 N, thiab 6 N, raws.

Tag nrho cov qauv: tensile zog nce nrog defocus, vim hais tias qhov loj defocus enlarges qhov chaw weld thiab - tseem ceeb tshaj - qhov sib cuag dav ntawm ob nplooj ntawv, uas ncaj qha tsav lub zog sib koom ua ke. Ntawm 4 mm defocus, lub zog poob dua, feem ntau yuav vim tias cov nqaj zoo degrades thiab qhov chaw yuav loj dua tab sis qis dua hauv lub zog ntom ntom, txo qis kev nkag mus thiab lub zog.

Core nrhiav:Tib - pom lub zog tensile ntawm 304 stainless hlau peaked ntawm15 N ntawm 3 mm defocus, qhov twg weld chaw morphology kuj zoo ib yam.

Table 2 - Cov ntsiab lus ntawm cov nyhuv ntawm defocus ntawm qhov chaw vuam, nkag mus, thiab lub zog tensile

Cov duab saum toj no rov tsim dua qhov ntsuas qhov tseem ceeb tshaj tawm hauv thawj Suav txoj kev tshawb fawb ntawm 150 W QCW fiber ntau laser nrog 304 stainless hlau ceg tawv pob qij txha ntawm 500 W ncov / 3 ms mem tes dav. Lawv yog cov ntaub ntawv siv rau cov txheej txheem engineers, tsis tau lees paub kev lees paub rau ib qho kev thov tshwj xeeb. Ib txwm siv tau los ntawm kev sim cov qauv ntawm koj cov khoom siv tiag tiag, tuab, thiab kho ua ntej tso tawm ntau lawm.

Thaum spatter, porosity, los yog tsis muaj fusion tshwm nyob rau hauv ntau lawm, cov hauv paus ntsiab lus yog feem ntau parameter mismatch, shielding roj xaiv, los yog deg paug. Diagnostic ntws nyob rau hauvhom laser vuam tsis xws luag thiab kev daws teeb meemtaug kev los ntawm kev txheeb xyuas qhov xwm txheej twg yog lub luag haujlwm.

Txoj kev tshawb no ntsuas lub laser beam profile thoob plaws qhov sib txawv defocus qhov tseem ceeb thiab pom tias thaum defocus ua rau qhov chaw lub zog faib ua ntau yam sib xws - tab sis dhau 4 hli qhov kev faib pib dua.

Los ntawm 304 stainless hlau ncej puab vuam, nrog rau tag nrho lwm yam nyob rau hauv tas li ntawd, sib txawv tus nqi defocus hloov lub weld qhov tsos, qhov chaw loj, qhov tob tob, thiab tensile zog. Qhov zoo tshaj plaws txheej txheem qhov rais yuav tsum txaus siab rau ob qho tib si tsos thiab lub zog ib txhij.

Cov ntsiab lus tseem ceeb:

• Thaum defocus nce, weld zoo txhim kho thiab tensile zog nce.
• Ntawm3 mm defocus, weld chaw uniformity thiab tensile lub zog yog ob qho tib si ntawm lawv qhov zoo tshaj plaws rau qhov geometry no.
• Tshaj li 3 hli defocus, ob qho tib si lub zog thiab zoo poob dua.

Rau kev pom dav dav ntawm cov khoom siv vuam, hom, thiab daim ntawv thov - suav nrog keyhole welding, fiber ntau laser xaiv, thiab yuav ua li cas xaiv ntawm handheld, automated, thiab QCW systems rau koj lub khw - tshawb tag nrholaser vuam tshuabqeb lossis hu rau King's Laser engineering ntawminfo@kingslaser.comrau ib qho qauv - txiav kev ntsuam xyuas ntawm koj cov khoom siv tiag tiag.