Ho chesoa ka lasere ka finyelloa ka ho sebelisa maballo a laser a tsoelang pele kapa a pulsed. Melao-motheo ealaser tjheseletsae ka aroloa ka tjheseletsa conduction mocheso le tjheseletsa laser tebileng ho kenella ka hare. Ha matla a matla a le ka tlase ho 104 ~ 105 W / cm2, ke mocheso conduction welding. Ka nako ena, botebo ba ho kenella ha bo teba 'me lebelo la ho cheselletsa le lieha; ha matla a matla a le kholo ho feta 105 ~ 107 W / cm2, bokaholimo ba tšepe bo koaheloa ke "likoti" ka lebaka la mocheso, ho etsa welding e tebileng ea ho kenella, e nang le E na le litšobotsi tsa lebelo la ho tjheseletsa ka potlako le karo-karolelano e kholo. Molao-motheo oa ho tsamaisa mochesolaser tjheseletsake: mahlaseli a laser futhumatsang bokaholimo ho sebetsoa, 'me mocheso holim'a metsi diffuses ho hare-hare ka conduction mogote. Ka ho laola li-parameter tsa laser tse kang bophara ba laser pulse, matla, matla a tlhōrō, le makhetlo a mangata a ho pheta-pheta, workpiece e qhibiliha ho etsa letamo le khethehileng le qhibilihisitsoeng.
Laser deep penetration welding ka kakaretso e sebelisa lebone la laser le tsoelang pele ho phethela khokahanyo ea thepa. Ts'ebetso ea eona ea 'mele ea metallurgic e ts'oana haholo le ea ho tjheseletsa beam ea elektrone, ke hore, mokhoa oa ho fetola matla o phethoa ka sebopeho sa "key-hole".
Tlas'a mahlaseli a laser a nang le matla a lekaneng a matla a lekaneng, thepa e fetoha mouoane 'me likoti tse nyenyane li thehoa. Lesoba lena le lenyenyane le tletseng mouoane le tšoana le 'mele o motšo, o monyang hoo e batlang e le matla 'ohle a sehlaseli sa ketsahalo. Mocheso o leka-lekaneng ka mokoting o fihla hoo e ka bang 2500°C. Mocheso o fetisoa ho tloha leboteng le ka ntle la lesoba la mocheso o phahameng, ho etsa hore tšepe e potolohileng lesoba e qhibilihe. Sekoti se senyenyane se tletse mouoane oa mocheso o phahameng o hlahisoang ke mouoane o tsoelang pele oa thepa ea lerako tlas'a mahlaseli a sefate. Mabota a lesoba le lenyenyane a pota-potiloe ke tšepe e qhibilihisitsoeng, 'me tšepe ea metsi e pota-potiloe ke lisebelisoa tse tiileng (ka mekhoa e mengata e tloaelehileng ea ho tjheseletsa le laser conduction welding, matla a pele a Deposited holim'a workpiece ebe o isoa ka hare ka ho fetisa. ). Mokelikeli o phallang ka ntle ho lerako la lesoba le tsitsipano ea holim'a lerako la lerako ke mohato o tsoelang pele o hlahisoang ke khatello ea mouoane ka har'a lesoba le ho boloka botsitso bo matla. Leseli le khanyang le tsoela pele ho kena ka lesoba le lenyenyane, 'me thepa e ka ntle ho lesoba le lenyenyane e ntse e phalla. Ha leseli le ntse le tsamaea, lesoba le lenyenyane le lula le le boemong bo tsitsitseng ba ho phalla.
Ke ho re, lesoba le lenyenyane le tšepe e qhibilihisitsoeng e pota-potileng lerako la lesoba li ea pele ka lebelo le eang pele la leballo la sefofane. Tšepe e qhibilihisitsoeng e tlatsa lekhalo le setseng ka mor'a hore lesoba le lenyenyane le tlosoe 'me le fokotsehe ka tsela e nepahetseng,' me weld e thehoa. Sena sohle se etsahala ka potlako hoo lebelo la tjheseletsa le ka fihlang ho limithara tse 'maloa ka motsotso.
Ka mor'a ho utloisisa likhopolo tsa motheo tsa matla a matla, li-welding tsa mocheso oa mocheso, le li-welding tse tebileng tsa ho kenella, re tla latela tlhahlobo ea papiso ea matla a matla le mekhahlelo ea metallographic ea li-diameter tse fapaneng tsa mantlha.
Papiso ea liteko tsa welding tse ipapisitseng le li-diameter tse tloaelehileng tsa laser core 'marakeng:
Matla a matla a sebaka se shebaneng le li-laser tse nang le li-diameter tse fapaneng tsa mantlha
Ho latela pono ea matla a matla, tlas'a matla a ts'oanang, ha bophara ba mantlha bo nyane, khanya ea laser e phahame le matla a mangata. Haeba laser e bapisoa le thipa e bohale, ha bophara ba mokokotlo bo le nyane, laser e bohale le ho feta. Matla a matla a 14um core diameter laser a feta makhetlo a 50 ho feta a 100um core diameter laser, 'me bokhoni ba ho sebetsa bo matla. Ka nako e ts'oanang, matla a matla a baloang mona ke a bonolo feela a tloaelehileng. Kabo ea 'nete ea matla ke kabo e lekantsoeng ea Gaussian,' me matla a bohareng e tla ba makhetlo a 'maloa ho feta matla a tloaelehileng.
Setšoantšo sa schematic sa kabo ea matla a laser e nang le li-diameter tse fapaneng tsa mantlha
'Mala oa setšoantšo sa kabo ea matla ke kabo ea matla. Ha 'mala o le mofubelu, matla a phahame. Matla a khubelu ke sebaka seo matla a leng teng. Ka kabo ea matla a laser ea maballo a laser a nang le li-diameter tse fapaneng tsa mantlha, ho ka bonoa hore bokapele ba lebone la laser ha le bohale 'me lebone la laser le bohale. Ha matla a le manyenyane, a tsepamisitsoe haholo ntlheng e le 'ngoe, a bohale le ho feta 'me a matlafala le matla a ho phunyeletsa.
Papiso ea litlamorao tsa welding tsa lasers tse nang le li-diameter tse fapaneng tsa mantlha
Papiso ea li-laser tse nang le li-diameter tse fapaneng tsa mantlha:
(1) Teko e sebelisa lebelo la 150mm / s, ho tsepamisa mohopolo oa tjheseletsa, 'me thepa ke 1 letoto la aluminium, 2mm e teteaneng;
2 Ha bophara ba mantlha bo feta 200um, ha ho bonolo ho fihlella botebo ba ho kenella ka li-alloys tse phahameng tse kang aluminium le koporo, 'me ho tjheseletsa ho tebileng ho tebileng ho ka finyelloa feela ka matla a phahameng;
(3) Li-laser tse nyenyane li na le matla a phahameng a matla 'me li khona ho phunya masoba a linotlolo ka potlako holim'a lisebelisoa tse nang le matla a mangata le libaka tse nyenyane tse amehileng ke mocheso. Leha ho le joalo, ka nako e ts'oanang, bokaholimo ba tjheseletsa bo thata, mme monyetla oa ho putlama ha keyhole o phahame nakong ea tjheseletsa e tlase ka lebelo, 'me lesoba la senotlolo le koetsoe nakong ea potoloho ea welding. Potoloho e telele, 'me likoli tse kang likoli le li-pores li atisa ho hlaha. E loketse ho sebetsa ka lebelo le phahameng kapa ho sebetsa ka mokhoa oa ho swing;
(4) Li-laser tse kholo tsa bophara ba li-laser li na le matheba a maholo a khanyang le matla a qhalakaneng haholoanyane, e leng se etsang hore li tšoanelehe haholoanyane bakeng sa ho khutlisa bokaholimo ba laser, ho koala, ho koala le lits'ebetso tse ling.
Nako ea poso: Oct-06-2023
