CW laser ndi QCW laser mu Welding

Makhalidwe Ogawa Mphamvu

Chodziwika bwino cha ma lasers a CW ndikugawa kwawo mphamvu kwa Gaussian, komwe kugawa mphamvu kwa gawo la mtanda wa laser kumachepa kuchokera pakati kupita panja panjira ya Gaussian (kugawa mwachizolowezi). Makhalidwe ogawawa amalola ma lasers a CW kuti akwaniritse kulondola kwambiri komanso kuwongolera bwino, makamaka pamapulogalamu omwe amafunikira kuyika mphamvu zambiri.

Chithunzi cha CW Laser Energy Distribution

Ubwino wa Continuous Wave (CW) Laser Welding

Kuwona kwa Microstructural

Kuyang'ana kapangidwe kazitsulo kazitsulo kumawonetsa zabwino zake za Continuous Wave (CW) laser kuwotcherera pa Quasi-Continuous Wave (QCW) pulse welding. Kuwotcherera kwa QCW pulse, mokakamizidwa ndi malire ake, nthawi zambiri mozungulira 500Hz, kumayang'anizana ndi kusinthanitsa pakati pa kuchulukana ndi kuya kwa kulowa. Kuchepa kwa kuphatikizika kumabweretsa kuya kosakwanira, pomwe kuphatikizika kwakukulu kumachepetsa liwiro la kuwotcherera, kumachepetsa mphamvu. Mosiyana ndi izi, kuwotcherera kwa laser kwa CW, mwa kusankha ma diameter oyenera a laser pachimake ndi mitu yowotcherera, kumakwaniritsa kuwotcherera koyenera komanso kosalekeza. Njirayi imatsimikizira kuti ndi yodalirika makamaka pamapulogalamu omwe amafunikira kukhulupirika kwa chisindikizo chapamwamba.

Kuganizira za Thermal Impact

Kuchokera pamalingaliro amatenthedwe, QCW pulse laser kuwotcherera imakhala ndi vuto la kuphatikizika, zomwe zimapangitsa kutentha mobwerezabwereza kwa seam weld. Izi zingayambitse kusagwirizana pakati pa microstructure yachitsulo ndi zinthu za kholo, kuphatikizapo kusiyana kwa kukula kwa kusuntha ndi kuzizira, potero kumawonjezera chiopsezo cha kusweka. CW laser kuwotcherera, Komano, amapewa nkhaniyi ndi kupereka yunifolomu ndi mosalekeza Kutentha ndondomeko.

Kusavuta Kusintha

Pankhani ya magwiridwe antchito ndikusintha, kuwotcherera kwa laser ya QCW kumafuna kuwongolera mosamala magawo angapo, kuphatikiza kubwereza pafupipafupi, mphamvu yayikulu, kuchuluka kwa kugunda, kuzungulira kwa ntchito, ndi zina zambiri. Kuwotcherera kwa CW laser kumathandizira kusintha, kuyang'ana kwambiri mawonekedwe a waveform, liwiro, mphamvu, ndi kuchuluka kwa defocus, kumachepetsa kwambiri zovuta zogwirira ntchito.

Kupita patsogolo kwaukadaulo mu CW Laser Welding

Ngakhale kuwotcherera kwa laser ya QCW kumadziwika chifukwa cha mphamvu zake zapamwamba komanso kutsika kwamafuta ochepa, kopindulitsa pakuwotcherera zinthu zomwe sizimamva kutentha komanso zida zoonda kwambiri, kupita patsogolo kwaukadaulo wa CW laser kuwotcherera, makamaka pakugwiritsa ntchito mphamvu zambiri (nthawi zambiri kuposa ma Watts 500) ndi kuwotcherera mwakuya kutengera momwe ma keyhole amagwirira ntchito, akulitsa kwambiri mawonekedwe ake ogwiritsira ntchito komanso kuchita bwino. Laser yamtunduwu ndiyoyenera makamaka pazida zokhuthala kuposa 1mm, zomwe zimafika pamlingo wapamwamba (kupitilira 8: 1) ngakhale kutentha kwambiri.

Quasi-Continuous Wave (QCW) Laser Welding

Focused Energy Distribution

QCW, yomwe imayimira "Quasi-Continuous Wave," imayimira ukadaulo wa laser pomwe laser imatulutsa kuwala mosapitilira, monga chithunzi a. Mosiyana ndi kagawidwe ka yunifolomu yamagetsi amtundu umodzi wopitilira lasers, ma laser a QCW amaika mphamvu zawo kwambiri. Khalidweli limapatsa ma lasers a QCW kukhala ndi mphamvu zochulukirapo, kumasulira kukhala mphamvu zolowera. Zotsatira zazitsulo zazitsulo zimakhala zofanana ndi mawonekedwe a "misomali" okhala ndi chiŵerengero chakuya mpaka m'lifupi, kulola ma lasers a QCW kuti azichita bwino pakugwiritsa ntchito ma alloys onyezimira kwambiri, zida zosamva kutentha, komanso kuwotcherera pang'ono molondola.

Kukhazikika Kukhazikika ndi Kuchepetsa Kusokoneza kwa Plume

Chimodzi mwazabwino zodziwika bwino za kuwotcherera kwa laser ya QCW ndikutha kwake kuchepetsa zotsatira za zitsulo zachitsulo pamayamwidwe azinthu, zomwe zimapangitsa kuti pakhale njira yokhazikika. Pakulumikizana kwa laser-material, evaporation yayikulu imatha kupanga chisakanizo cha nthunzi wachitsulo ndi madzi a m'magazi pamwamba pa dziwe losungunuka, lomwe limatchedwa chitsulo. Chingwechi chimatha kutchingira zinthuzo ku laser, zomwe zimapangitsa kuti magetsi azikhala osakhazikika komanso zolakwika monga sipatter, malo ophulika, ndi maenje. Komabe, kutulutsa kwakanthawi kwa ma lasers a QCW (mwachitsanzo, kuphulika kwa 5ms kotsatiridwa ndi kuyimitsidwa kwa 10ms) kumawonetsetsa kuti kugunda kwa laser kulikonse kumafika pamtunda wosakhudzidwa ndi zitsulo zachitsulo, zomwe zimapangitsa kuti pakhale njira yowotcherera yokhazikika, makamaka yopindulitsa pakuwotcherera ma sheet owonda.

Stable Melt Pool Dynamics

Mphamvu za dziwe losungunuka, makamaka ponena za mphamvu zomwe zimagwira pa keyhole, ndizofunikira kwambiri pozindikira ubwino wa weld. Ma laser osalekeza, chifukwa cha nthawi yayitali komanso madera akuluakulu omwe amakhudzidwa ndi kutentha, amakonda kupanga maiwe osungunuka odzaza ndi zitsulo zamadzimadzi. Izi zingayambitse zolakwika zomwe zimagwirizanitsidwa ndi maiwe akuluakulu osungunuka, monga kugwa kwa keyhole. Mosiyana ndi izi, mphamvu yowunikira komanso nthawi yayitali yolumikizirana ya QCW laser kuwotcherera imayang'ana dziwe losungunuka mozungulira chibowo, zomwe zimapangitsa kuti pakhale kugawa kwamphamvu kofananira komanso kuchepa kwa porosity, kusweka, ndi spatter.