Enwere ike nweta ịgbado ọkụ laser site na generator laser na-aga n'ihu ma ọ bụ pulsed. Enwere ike kewaa ụkpụrụ nke ịgbado ọkụ laser n'ime ịgbado ọkụ ọkụ conduction na ịgbado ọkụ laser miri emi. Ike njupụta na-erughị 104 ~ 105 W / cm2 bụ okpomọkụ conduction ịgbado ọkụ, n'oge a, omimi nke agbaze, na ịgbado ọkụ ọsọ bụ ngwa ngwa; Mgbe ike njupụta dị ukwuu karịa 105 ~ 107 W / cm2, metal elu bụ concave n'ime "keyholes" n'okpuru omume nke okpomọkụ, na-akpụ miri fusion ịgbado ọkụ, nke nwere àgwà nke ngwa ngwa ịgbado ọkụ ọsọ na nnukwu omimi-obosara ruru.
Taa, anyị ga-bụ-ekpuchi ihe ọmụma nke isi ihe na-emetụta àgwà nke laser miri welding ịgbado ọkụ
1. Ike Laser
Na ịgbado ọkụ laser miri emi, ike laser na-achịkwa ma omimi ntinye na ọsọ ịgbado ọkụ. Omimi weld nwere njikọ chiri anya na njupụta ike beam na ọ bụ ọrụ nke ike beam merenụ na ebe mgbaba ebe. N'ikwu okwu n'ozuzu, maka ụfọdụ dayameta laser doo, omimi ntinye na-abawanye site na mmụba nke ike ọkụ.
2. Focal Spot
Ogo ntụpọ beam bụ otu n'ime mgbanwe dị mkpa na ịgbado ọkụ laser n'ihi na ọ na-ekpebi njupụta ike. Mana ịlele ya bụ ihe ịma aka maka lasers ike dị elu, n'agbanyeghị na enwere ọtụtụ usoro nha na-apụtaghị ìhè dị.
Enwere ike ịgbakọ oke ntụpọ nke diffraction dị ka echiche diffraction siri dị, mana nha ntụpọ ahụ buru ibu karịa uru agbakọrọ n'ihi ịdị adị nke ntụgharị uche na-adịghị mma. Ụzọ nha kachasị mfe bụ usoro profaịlụ iso-okpomọkụ, nke na-atụ dayameta nke ebe a na-ahụ anya na perforation mgbe akwụkwọ ahụ gbara ọkụ ma banye na efere polypropylene. Usoro a site na omume nha, na-amata nha ike laser na oge ime ihe.
3. Nchekwa gas
Usoro ịgbado ọkụ laser na-ejikarị gas nchebe (helium, argon, nitrogen) kpuchido ọdọ mmiri a wụrụ awụ, na-egbochi workpiece si oxidation na usoro ịgbado ọkụ. Ihe nke abụọ mere eji eji gas nchebe bụ iji chebe oghere na-elekwasị anya site na mmetọ site na vapors ígwè na nsị site na mmiri mmiri. Karịsịa na ịgbado ọkụ laser dị elu, ejecta na-adị ike nke ukwuu, ọ dị mkpa iji chebe oghere. Mmetụta nke atọ nke gas na-echebe bụ na ọ na-arụ ọrụ nke ọma n'ịgbasa ihe nchebe plasma na-emepụta site na ịgbado ọkụ laser dị elu. Uzuzu ọla na-amịkọrọ eriri laser wee banye n'ime igwe ojii plasma. Gas na-echebe gburugburu uzuoku ígwè na-emekwa ka ionizes n'ihi okpomọkụ. Ọ bụrụ na enwere oke plasma, plasma na-eri ọkụ laser n'ụzọ ụfọdụ. Dị ka ike nke abụọ, plasma dị n'elu ọrụ na-arụ ọrụ, nke na-eme ka omimi weld ghara ịdị omimi na ọdọ mmiri weld gbasawanye.
Kedu ka esi ahọrọ gas mkpuchi kwesịrị ekwesị?
4. Ọnụọgụ absorption
Mmụba laser nke ihe na-adabere na ụfọdụ ihe dị mkpa nke ihe onwunwe, dị ka ọnụego absorption, reflectivity, thermal conductivity, okpomọkụ na-agbaze, na okpomọkụ evaporation. N'ime ihe ndị a niile, ihe kachasị mkpa bụ ọnụọgụ absorption.
Ihe abụọ na-emetụta ọnụego nnabata nke ihe ahụ na beam laser. Nke mbụ bụ ọnụọgụ nguzogide nke ihe. A na-achọpụta na ọnụ ọgụgụ ntinye nke ihe ahụ na-adaba na mgbọrọgwụ square nke nkwụsi ike na-eguzogide, na nkwụsị nke nkwụsị na-agbanwe na okpomọkụ. Nke abuo, ala ala (ma ọ bụ imecha) nke ihe ahụ nwere mmetụta dị mkpa na ọnụọgụ absorption nke beam, nke nwere mmetụta dị ukwuu na mmetụta ịgbado ọkụ.
5. Welding Speed
Ọsọ ịgbado ọkụ nwere mmetụta dị ukwuu na omimi nke ntinye. Ịbawanye ọsọ ga-eme ka omimi nke penetration shallower, ma oke ala ga-eduga oke agbaze nke ihe na workpiece ịgbado ọkụ site. Ya mere, e nwere ihe kwesịrị ekwesị ịgbado ọkụ nso nso maka otu ihe onwunwe na ụfọdụ ike laser na a ụfọdụ ọkpụrụkpụ, na kacha ntanye omimi nwere ike nweta na kwekọrọ ekwekọ ọsọ uru.
6. Ogologo Focal nke oghere oghere
A na-etinyekarị oghere na-elekwasị anya n'isi egbe ịgbado ọkụ, n'ozuzu, a na-ahọrọ ogologo ogologo 63 ~ 254mm (dayameta 2.5 "~ 10"). Nha ebe a na-elekwasị anya na-adaba n'ogologo ebe a na-atụgharị uche, ka ogologo ebe a na-atụgharị uche dị mkpụmkpụ, ebe ahụ na-adị ntakịrị. Otú ọ dị, ogologo nke Baịbụl hiwere isi n'ebe ogologo na-emetụtakwa omimi nke na-elekwasị anya, ya bụ, omimi nke na-elekwasị anya na-abawanye synchronously na Baịbụl hiwere isi n'ebe ogologo, otú ahụ obere Baịbụl hiwere isi n'ebe ogologo nwere ike melite ike njupụta, ma n'ihi na omimi nke na-elekwasị anya bụ obere, anya. n'etiti oghere na workpiece ga-n'ụzọ ziri ezi nọgidere na-enwe, na omimi nke penetration bụghị nnukwu. N'ihi mmetụta nke splashes na laser mode n'oge ịgbado ọkụ, kacha nso nso focal omimi eji na n'ezie ịgbado ọkụ bụ ukwuu n'ime 126mm (dayameta 5 ") A oghere na a hiwere isi n'ebe ogologo nke 254mm (dayameta 10") nwere ike họrọ mgbe onuete dị ukwuu. ma ọ bụ weld kwesịrị ịbawanye site na ịbawanye nha ntụpọ ahụ. N'okwu a, achọrọ ike mmepụta laser dị elu (njupụta ike) iji nweta mmetụta oghere ntinye miri emi.
Ajụjụ ndị ọzọ gbasara ọnụahịa igwe ịgbado ọkụ laser ejiri aka na nhazi
Oge nzipu: Sep-27-2022