Kuenzanisa welding mhedzisiro ye lasers ine akasiyana epakati madhayamita

Laser weldinginogona kuwanikwa uchishandisa inoenderera kana pulsed laser matanda. Misimboti yelaser weldinginogona kukamurwa kuita kupisa conduction welding uye laser yakadzika kupinda welding. Kana simba remagetsi riri pasi pe104 ~ 105 W/cm2, ndiko kupisa conduction welding. Panguva ino, kudzika kwekupinda hakuna kudzika uye kumhanya kwewelding kunononoka; kana kuwanda kwesimba kunopfuura 105 ~ 107 W/cm2, nzvimbo yesimbi inodzika kuita "maburi" nekuda kwekupisa, ichiita yakadzika yekupinda welding, iyo ine Iine maitiro ekukurumidza welding kumhanya uye yakakura mativi reshiyo. Nheyo yekufambisa kwekushisalaser weldingndiko: Laser mwaranzi inopisa pamusoro kuti igadziriswe, uye kupisa kwepamusoro kunopararira kune mukati kuburikidza nekupisa conduction. Nekudzora laser paramita senge laser pulse hupamhi, simba, peak simba, uye kudzokorora frequency, workpiece inonyungudutswa kuumba chaiyo yakanyungudutswa dziva.

Laser yakadzika yekupinda welding inowanzo shandisa inoenderera laser danda kupedzisa kubatana kwezvinhu. Yayo metallurgical physical process yakafanana neiyo yeelectron beam welding, kureva kuti, simba rekushandura simba rinopedzwa kuburikidza ne "key-hole" chimiro.

Pasi pelaser irradiation ine yakakwira yakakwana simba density, zvinhu zvinoputika uye maburi madiki anoumbwa. Iri gomba diki rakazadzwa nemhute rakaita semuviri mutema, unotora rinenge simba rose redanda rechiitiko. Tembiricha yekuenzanisa mugomba inosvika 2500°C. Kupisa kunotamiswa kubva kumadziro ekunze kwegomba rekupisa kwepamusoro, zvichiita kuti simbi yakakomberedza gomba inyunguduke. Iro gomba duku rakazadzwa nepamusoro-tembiricha steam inogadzirwa nekuenderera mberi kwekuputika kwemadziro emadziro pasi peirradiation yedanda. Madziro egomba diki akakomberedzwa nesimbi yakanyungudutswa, uye iyo simbi yemvura yakakomberedzwa nezvinhu zvakasimba (mune yakawanda yakajairwa welding maitiro uye laser conduction welding, iro simba rekutanga Rinoiswa pamusoro peiyo workpiece uye rozoendeswa mukati nekuchinjisa. ) Mvura inoyerera kunze kwemadziro egomba uye kudhonzerana kwepamusoro kwemadziro emadziro ari muchikamu pamwe neanogara achigadzirwa chiutsi kudzvanywa mukati megomba uye kuchengetedza chiyero chine simba. Chiedza chechiedza chinopfuurira kupinda mugomba duku, uye zvinhu zviri kunze kwegomba duku zvinoramba zvichiyerera. Sezvo chiedza chechiedza chinofamba, gomba duku rinogara rakagadzikana rekuyerera.

Kureva kuti, kaburi kadiki nesimbi yakanyungudutswa yakakomberedza mudhuri wegomba zvinoenda mberi nekumhanya kwekumberi kwedanda romutyairi. Simbi yakanyungudutswa inozadza mukaha wakasara mushure mekunge gomba diki rabviswa uye rinodzika zvinoenderana, uye weld inoumbwa. Zvese izvi zvinoitika nekukasira zvekuti kumhanya kwewelding kunogona kusvika nyore mamita akati wandei paminiti.

Mushure mekunzwisisa iwo ekutanga pfungwa dzesimba density, thermal conductivity welding, uye yakadzika yekupinda welding, isu tinotevera kuitisa ongororo yekuenzanisa yesimba density uye metallographic zvikamu zveakasiyana epakati madhayamita.

Kuenzanisa kwekuyedza welding kwakavakirwa pane yakajairwa laser musimboti madhayamita pamusika:

Simba density yefocal spot chinzvimbo chemalaser ane akasiyana epakati madhayamita

Kubva pakuona kwesimba resimba, pasi pesimba rimwechete, iyo diki dhayamita yepakati, iyo inokwirisa kupenya kwelaser uye kuwedzera kwakawedzera simba. Kana iyo laser inofananidzwa nebanga rakapinza, iyo diki dhayamita yepakati, iyo inopinza iyo laser. Iyo simba density ye14um core diameter laser inodarika ka50 iyo ye100um core diameter laser, uye kugona kugadzirisa kwakasimba. Panguva imwecheteyo, simba remagetsi rinoverengwa pano rinongori nyore avhareji density. Iko kugovera kwesimba chaiko kugovaniswa kweGaussian, uye simba repakati richave rakapetwa kanoverengeka avhareji yesimba remagetsi.

Schematic dhayagiramu yekugovera simba relaser ine akasiyana epakati madhayamita

Rudzi rwechiratidziro chekugovera simba ndiko kugovera simba. Iyo yakatsvuka ruvara, inowedzera simba. Simba dzvuku inzvimbo iyo simba rinoiswa. Kuburikidza nekugoverwa kwesimba relaser kwemalaser matanda ane akasiyana epakati madhayamita, zvinogona kuoneka kuti laser beam kumberi haina kupinza uye laser danda rakapinza. Iyo diki, iyo yakanyanya kusimba simba iri pane imwe pfungwa, iyo inopinza uye yakasimba iyo inopinza kugona kwayo.

Kuenzanisa welding mhedzisiro ye lasers ine akasiyana epakati madhayamita

Kuenzanisa kwema lasers ane akasiyana epakati madhayamita:

(1) Kuedza kunoshandisa kumhanya kwe150mm/s, kutarisisa chinzvimbo chewelding, uye zvinhu zvacho ndeye 1 series aluminium, 2mm gobvu;

(2) Iyo yakakura iyo dhayamita yepakati, yakakura hupamhi hwekunyungudika, yakakura nzvimbo inobatwa nekupisa, uye idiki iyo unit simba density. Kana iyo dhayamita yepakati ichipfuura 200um, hazvisi nyore kuwana kudzika kwekupinda pane yakakwira-reaction alloys senge aruminiyamu nemhangura, uye yakakwirira Deep penetration welding inogona kuwanikwa chete nesimba guru;

(3) Madiki-musimboti lasers ane yakakwirira simba density uye anogona kukurumidza kubaya makiyi maburi pamusoro pezvinhu zvine simba rakawanda uye nzvimbo diki dzakakanganiswa nekupisa. Zvisinei, panguva imwecheteyo, pamusoro peiyo weld ine hutsinye, uye iyo keyhole kudonha mukana wakakwira panguva yakaderera-kumhanya welding, uye kiyi yakavharwa panguva yekutenderera kutenderera. Kutenderera kwacho kwakareba, uye hurema hwakadai sehurema uye pores zvinowanzoitika. Inokodzera kushandiswa kwepamusoro-kumhanya kana kushandiswa neine swing trajectory;

(4) Mahombe epakati dhayamita lasers ane akakura mwenje makwapa uye akawanda akapararira simba, zvichiita kuti ive yakanyanya kukodzera kune laser pamusoro remelting, cladding, annealing uye mamwe maitiro.