Ukusebenzisana phakathi kwe-laser nezinto zokwakha kuhilela izinto eziningi ezibonakalayo nezici. Izihloko ezintathu ezilandelayo zizokwethula izinto ezintathu ezibalulekile zomzimba ezihlobene nenqubo ye-laser welding ukuze kunikezwe ozakwabo ukuqonda okucacile kwelaser Welding inqubo: ihlukaniswe ngezinga lokumuncwa kwe-laser kanye nezinguquko esimweni, i-plasma kanye nomphumela we-keyhole. Kulokhu, sizobuyekeza ubudlelwano phakathi kwezinguquko zesimo se-laser nezinto zokwakha nezinga lokumunca.
Izinguquko esimweni sendaba ezibangelwa ukusebenzisana phakathi kwe-laser nezinto zokwakha
Ukucutshungulwa kwe-laser kwezinto zensimbi kusekelwe ikakhulukazi ekusetshenzisweni okushisayo kwemiphumela ye-photothermal. Lapho i-laser irradiation isetshenziswa endaweni ebonakalayo, izinguquko ezahlukahlukene zizokwenzeka endaweni engaphezulu yento ekuminyana kwamandla okuhlukene. Lezi zinguquko zihlanganisa ukuphakama kwezinga lokushisa elingaphezulu, ukuncibilika, ukuhwamuka, ukwakheka kwezimbobo zokhiye, nokukhiqizwa kwe-plasma. Ngaphezu kwalokho, izinguquko esimweni somzimba sendawo yezinto ezibonakalayo zithinta kakhulu ukumuncwa kwe-laser. Ngokukhula kokuminyana kwamandla kanye nesikhathi sokusebenza, impahla yensimbi izoba nezinguquko ezilandelayo esimweni:
Lapho i-amandla laserukuminyana kuphansi (<10 ^ 4w/cm ^ 2) futhi isikhathi sokushiswa kwemisebe sifushane, amandla e-laser amuncwa insimbi angabangela kuphela ukuthi izinga lokushisa lempahla likhuphuke lisuka phezulu liye ngaphakathi, kodwa isigaba esiqinile sihlala singashintshiwe. . Isetshenziswa kakhulu ekwelashweni kokuqina kwengxenye ye-annealing kanye nokuguqulwa kwesigaba, ngamathuluzi, amagiya, nama-bearings amaningi;
Ngokukhuphuka kwamandla e-laser (10 ^ 4-10 ^ 6w/cm ^ 2) kanye nokwelulwa kwesikhathi sokushiswa kwemisebe, ingaphezulu lezinto ezibonakalayo liyancibilika kancane kancane. Njengoba amandla okokufaka akhula, isixhumi esibonakalayo esiqinile kancane kancane siya endaweni ejulile yezinto. Le nqubo engokomzimba isetshenziselwa ikakhulukazi ukunyibilikisa phezulu, i-alloying, i-cladding, kanye ne-thermal conductivity welding yezinsimbi.
Ngokuqhubeka nokwandisa ukuminyana kwamandla (>10 ^ 6w/cm ^ 2) nokwelula isikhathi sesenzo se-laser, indawo ebonakalayo ayincibiliki nje kuphela kodwa futhi iyahwamuka, futhi izinto ezihwamuke zibuthana eduze kwendawo ebonakalayo futhi zi-ionise kancane ukuze zakhe i-plasma. Le plasma ezacile isiza impahla ukuthi imunce i-laser; Ngaphansi kwengcindezi yokuhwamuka nokunwetshwa, indawo ewuketshezi iyawohloka futhi yakhe imigodi. Lesi sigaba singasetshenziselwa ukushisela i-laser, imvamisa ekuhlanganiseni kwe-thermal conductivity welding yokuxhumana okuncane ngaphakathi kuka-0.5mm.
Ngokuqhubeka nokwandisa ukuminyana kwamandla (> 10 ^ 7w/cm ^ 2) nokwandisa isikhathi sokushiswa kwemisebe, indawo ebonakalayo ithola ukuhwamuka okunamandla, okwenza i-plasma enezinga eliphezulu le-ionization. Le plasma eminyene inomphumela ovikelayo ku-laser, yehlisa kakhulu ukuminyana kwamandla wesigameko se-laser kundaba. Ngasikhathi sinye, ngaphansi kwamandla amakhulu okuphendula umhwamuko, izimbobo ezincane, ezaziwa ngokuthi ama-keyholes, kwakheka ngaphakathi kwensimbi encibilikisiwe, Ukuba khona kwezimbobo zokhiye kunenzuzo ukuze izinto zimunce i-laser, futhi lesi sigaba singasetshenziselwa ukuhlanganiswa okujulile kwe-laser. ukushisela, ukusika nokubhoboza, ukuqina komthelela, njll.
Ngaphansi kwezimo ezihlukene, ubude begagasi obuhlukene be-laser irradiation ezintweni zensimbi ezehlukene buzoholela emananini athile wokuminyana kwamandla esigabeni ngasinye.
Ngokuphathelene nokumuncwa kwe-laser ngezinto zokwakha, ukuhwamuka kwezinto kungumngcele. Uma impahla ingadluli ku-vaporization, kungakhathaliseki ukuthi isesigabeni esiqinile noma esiwuketshezi, ukumuncwa kwayo kwe-laser kushintsha kuphela kancane ngokunyuka kwezinga lokushisa elingaphezulu; Uma impahla ihwamuka futhi yakha i-plasma nezimbobo zokhiye, ukumuncwa kwe-laser kuzoshintsha kungazelelwe.
Njengoba kuboniswe kuMfanekiso 2, izinga lokumuncwa kwe-laser endaweni ebonakalayo ngesikhathi sokushisela nge-laser liyahlukahluka ngokuminyana kwamandla e-laser kanye nezinga lokushisa elingaphezulu lempahla. Uma i-material ingancibilikisiwe, izinga lokumuncwa kwe-laser liyakhula kancane kancane ngokukhuphuka kwezinga lokushisa elingaphezulu. Uma ukuminyana kwamandla kukhulu kuno-(10 ^ 6w/cm ^ 2), okubalulekile kuhwamuka ngamandla, kwenze imbobo kakhiye. I-laser ingena embotsheni yokhiye ukuze ibonise kaningi futhi imunce, okuholela ekwenyukeni okukhulu kwezinga lokumuncwa kwezinto ku-laser kanye nokwenyuka okuphawulekayo kokujula kokuncibilika.
Ukumuncwa Laser by Metal Materials - Wavelength
Isibalo esingenhla sibonisa ijika lobudlelwano phakathi kokubukeka, ukumunca, nobude begagasi bezinsimbi ezivame ukusetshenziswa kuzinga lokushisa legumbi. Esifundeni se-infrared, izinga lokumunca liyancipha futhi ukubukeka kuyanda ngokwanda kobude beza. Izinsimbi eziningi zikhombisa ngokuqinile ukukhanya kwe-infrared okungu-10.6um (CO2) kuyilapho kubonakalisa kancane ukukhanya kwe-infrared okungu-1.06um (1060nm) wamaza. Izinto zensimbi zinezinga eliphezulu lokumunca lama-lasers we-wavelength amafushane, njengokukhanya okuluhlaza okwesibhakabhaka nokuluhlaza.
Ukumuncwa kwe-Laser ngezinsimbi zensimbi - Ithempelesha Yezinto ezibonakalayo kanye Ne-Laser Energy Density
Uma sithatha ingxubevange ye-aluminium njengesibonelo, uma impahla iqinile, izinga lokumunca i-laser libalelwa ku-5-7%, izinga lokumuncwa kwe-liquid lifika ku-25-35%, futhi lingafinyelela ngaphezu kuka-90% esimweni se-keyhole.
Izinga lokumuncwa kwe-laser liyakhula ngokukhuphuka kwezinga lokushisa. Izinga lokumuncwa kwezinto zensimbi ekamelweni lokushisa liphansi kakhulu. Lapho izinga lokushisa likhuphuka lifinyelele eduze nendawo yokuncibilika, izinga lokumunca lingafinyelela ku-40% ~ 60%. Uma izinga lokushisa liseduze nendawo yokubilisa, izinga lokumunca lingafinyelela ku-90%.
Ukumuncwa Laser by Metal Materials - Surface Condition
Izinga lokumuncwa elivamile likalwa kusetshenziswa indawo yensimbi ebushelelezi, kodwa ekusebenzeni okungokoqobo kokushisisa nge-laser, ngokuvamile kuyadingeka ukwandisa izinga lokumunca lezinto ezithile ezibonisa phezulu (i-aluminium, ithusi) ukuze kugwenywe ukusoda okungamanga okubangelwa ukubonakaliswa okuphezulu;
Kungasetshenziswa izindlela ezilandelayo:
1. Ukwamukela izinqubo ezifanele zokwelashwa kwangaphambili kwendawo ukuze kuthuthukiswe ukukhanya kwe-laser: i-prototype oxidation, i-sandblasting, ukuhlanza i-laser, i-nickel plating, i-tin plating, ukunamathela kwe-graphite, njll. konke kungathuthukisa izinga lokumuncwa kwe-laser;
Umnyombo uwukukhulisa ukuhwalala kwendawo ebonakalayo (okuvumela ukubonakaliswa kwe-laser okuningi nokumuncwa), kanye nokwandisa izinto zokumboza ngezinga eliphezulu lokumunca. Ngokumunca amandla e-laser nokuyincibilikisa nokuyishintshashintsha ngezinga eliphezulu lokumuncwa, ukushisa kwe-laser kudluliselwa kokubalulekile ukuze kuthuthukiswe izinga lokumuncwa kwempahla futhi kuncishiswe ukushisela okubonakalayo okubangelwa ukubukeka okuphezulu.
Isikhathi sokuthumela: Nov-23-2023
