Ukushiswa kwe-laser kungenziwa ngokuqhubekayo noma nge-pulsed laser generator. Umgomo we-laser welding ungahlukaniswa ube yi-welding conduction welding kanye ne-laser deep fusion welding. Ubuningi bamandla obungaphansi kuka-104 ~ 105 W/cm2 wukushisela ukushisa, ngalesi sikhathi, ukujula kokuncibilika, nesivinini sokushisela kuhamba kancane; Lapho ukuminyana kwamandla kungaphezu kuka-105 ~ 107 W/cm2, indawo yensimbi igoqeka ibe "izimbobo zokhiye" ngaphansi kwesenzo sokushisa, yakha i-fusion welding ejulile, enezici zejubane lokushisela elisheshayo kanye nesilinganiso esikhulu sobubanzi bobubanzi.
Namuhla, sizofaka ikakhulukazi ulwazi lwezinto ezinkulu ezithinta ikhwalithi ye-laser deep fusion welding
1. Amandla eLaser
Ku-laser deep fusion welding, amandla e-laser alawula kokubili ukujula kokungena kanye nesivinini sokushisela. Ukujula kwe-weld kuhlobene ngokuqondile nokuminyana kwamandla e-beam futhi kuwumsebenzi wamandla ebhili yesigameko kanye nendawo yokugxila ye-beam. Ngokuvamile, ngomugqa othile we-laser wobubanzi, ukujula kokungena kuyanda ngokwanda kwamandla e-beam.
2. I-Focal Spot
Usayizi wendawo ye-Beam ungenye yezinto eziguquguqukayo ezibaluleke kakhulu ku-laser welding ngoba inquma ukuminyana kwamandla. Kodwa ukukukala kuyinselele kuma-lasers anamandla amakhulu, nakuba kunamasu amaningi okulinganisa angaqondile atholakalayo.
Usayizi wendawo yomkhawulo wokuhluka wokugxilwa kwe-beam angabalwa ngokuya ngethiyori ye-diffraction, kodwa usayizi wangempela wendawo mkhulu kunevelu ebaliwe ngenxa yokuba khona kokubonakala kokugxila okungalungile. Indlela yokulinganisa elula yindlela yephrofayela ye-iso-temperature, ekala ububanzi bendawo okugxilwe kuyo kanye nokubhobozwa ngemva kokushiswa kwephepha eliwugqinsi futhi lingene ngepuleti le-polypropylene. Le ndlela ngomkhuba wokulinganisa, ibamba usayizi wamandla we-laser nesikhathi sesenzo se-beam.
3. Igesi Evikelayo
Inqubo yokushisela nge-laser ivame ukusebenzisa amagesi avikelayo (i-helium, i-argon, i-nitrogen) ukuze kuvikelwe ichibi elincibilikisiwe, kuvinjwe i-workpiece kusuka ku-oxidation kwinqubo yokushisela. Isizathu sesibili sokusebenzisa igesi evikelayo ukuvikela ilensi egxilile ekungcolisweni umhwamuko wensimbi kanye nokufafazwa ngamaconsi awuketshezi. Ikakhulukazi ku-high-power laser welding, i-ejecta iba namandla kakhulu, kuyadingeka ukuvikela ilensi. Umphumela wesithathu wegesi evikelayo ukuthi iphumelela kakhulu ekuhlakazeni isivikelo se-plasma esikhiqizwa yi-high-power laser welding. Umhwamuko wensimbi udonsa umsebe we-laser bese u-ionze ube yifu le-plasma. Igesi evikelayo ezungeze umhwamuko wensimbi ibuye ibe ion ngenxa yokushisa. Uma kune-plasma eningi kakhulu, i-laser beam ngandlela-thile idliwa yi-plasma. Njengamandla esibili, i-plasma ikhona endaweni yokusebenza, okwenza ukujula kwe-weld kungashoni futhi indawo ye-weld pool ibe banzi.
Indlela yokukhetha igesi yokuvikela efanele?
4. Izinga lokumuncwa
Ukumuncwa kwe-laser kwento kuncike kwezinye izici ezibalulekile zezinto ezibonakalayo, njengezinga lokumunca, ukubukeka kwe-reflection, ukuqhutshwa kwe-thermal, izinga lokushisa elincibilikayo, nezinga lokushisa lokuhwamuka. Kuzo zonke izici, okubaluleke kakhulu izinga lokumunca.
Izinto ezimbili ezithinta izinga lokumuncwa kwento eyisigxobo se-laser. Eyokuqala yi-coefficient yokumelana yezinto. Kutholakala ukuthi izinga lokumunca lezinto ezibonakalayo lilingana nempande yesikwele ye-coefficient yokumelana, futhi i-coefficient yokumelana iyahlukahluka ngokushisa. Okwesibili, isimo esingaphezulu (noma sokuqeda) sezinto ezibonakalayo sinethonya elibalulekile ekufakweni kwe-beam, okunomthelela obalulekile kumphumela wokushisela.
5. Welding Speed
Isivinini se-welding sinethonya elikhulu ekujuleni kokungena. Ukwenyusa isivinini kuzokwenza ukujula kokungena kungabi ncane kakhulu, kodwa kuphansi kakhulu kuzoholela ekuncibilikeni ngokweqile kwezinto kanye ne-workpiece welding ngokusebenzisa. Ngakho-ke, kukhona ijubane elifanele lejubane lokushisela lempahla ethile enamandla athile e-laser nogqinsi oluthile, futhi ukujula kokungena okuphezulu kungatholwa ngenani elihambisanayo lesivinini.
6. Ubude bokugxila beLensi yokugxila
Ilensi yokugxila ivamise ukufakwa ekhanda lesibhamu esishiselayo, ngokuvamile, ubude bendawo obungu-63~254mm (ububanzi obungu-2.5 "~10") bukhethwa. Ubukhulu bendawo okugxilwe kuyo bulingana nobude bokugxila, uma ubude bendawo bufushane, ibala liba lincane. Kodwa-ke, ubude bobude obugxilile buphinde buthinte ukujula kokugxila, okungukuthi, ukujula kokugxila kukhula ngokuhambisana nobude bokugxila, ngakho-ke ubude bokugxila obufushane bungathuthukisa ukuminyana kwamandla, kodwa ngenxa yokuthi ukujula kokugxila kuncane, ibanga. phakathi kwe-lens kanye ne-workpiece kumele igcinwe ngokunembile, futhi ukujula kokungena akukukhulu. Ngenxa yethonya lama-splashes kanye nemodi ye-laser ngesikhathi sokushisela, ukujula okufushane okugxilile okusetshenziswe ekushiseleni kwangempela ngokuvamile kungu-126mm (ububanzi obungu-5 "). Ilensi enobude obugxilwe obungu-254mm (ububanzi obungu-10 ") ingakhethwa uma umthungo mkhulu. noma i-weld idinga ukwenyuswa ngokwandisa usayizi wendawo. Kulokhu, amandla aphezulu okukhipha i-laser (ukuminyana kwamandla) ayadingeka ukuze kuzuzwe umphumela womgodi wokungena ojulile.
Imibuzo eyengeziwe mayelana nentengo yomshini we-laser welding kanye nokucushwa
Isikhathi sokuthumela: Sep-27-2022