CW laser a me QCW laser ma Welding

Nā ʻano o ka hoʻohele ʻana i ka ikehu

ʻO kahi hiʻohiʻona koʻikoʻi o nā lasers CW ʻo kā lākou Gaussian puʻupuʻu ikehu, kahi e hoʻemi ai ka puʻunaue ikehu o ka ʻāpana kea o kahi kukui laser mai ke kikowaena i waho i kahi kumu Gaussian (maʻamau maʻamau). ʻO kēia hiʻohiʻona hoʻoili e hiki ai i nā lasers CW ke hoʻokō kiʻekiʻe kiʻekiʻe o ka nānā pono ʻana a me ka hana ʻana i ka pono, ʻoi aku hoʻi i nā noi e koi ana i ka hoʻopili ʻana i ka ikehu.

CW Laser Energy Distribution Diagram

Nā Pōmaikaʻi o ka Nalu Hoʻomau (CW) Laser Welding

Ka Manaʻo Microstructural

ʻO ka nānā ʻana i ka microstructure o nā metala e hōʻike ana i nā pono kūʻokoʻa o ka hoʻoheheʻe ʻana i ka laser Continuous Wave (CW) ma luna o ka hoʻoheheʻe pulse Quasi-Continuous Wave (QCW). ʻO ka wili puʻupuʻu QCW, i kāohi ʻia e kona palena alapine, ma kahi o 500Hz, e kū ana i kahi kālepa ma waena o ka overlap rate a me ka hohonu komo. ʻO ka haʻahaʻa overlap rate ka mea i lawa ʻole ka hohonu, akā ʻo ka overlap rate kiʻekiʻe ka mea e hoʻopaʻa i ka wikiwiki wili, e hōʻemi ana i ka pono. ʻO ka hoʻohālikelike ʻana, CW laser welding, ma o ke koho ʻana i nā diameters core laser kūpono a me nā poʻo welding, e hoʻokō pono a hoʻomau mau. Hōʻoiaʻiʻo ʻia kēia ʻano hana i nā noi e koi ana i ka kūpaʻa sila kiʻekiʻe.

Noʻonoʻo i ka hopena wela

Mai ka manaʻo o ka hopena wela, ua pilikia ʻo QCW pulse laser welding i ka pilikia o ka overlap, e alakaʻi ana i ka hoʻomehana pinepine ʻana o ka weld seam. Hiki i kēia ke hoʻolauna i nā mea like ʻole ma waena o ka microstructure o ka metala a me ka mea makua, me nā ʻano like ʻole o ka nui dislocation a me nā helu hoʻomaha, a laila e hoʻonui ai i ka pilikia o ka pohā. ʻO CW laser welding, ma ka ʻaoʻao ʻē aʻe, e pale i kēia pilikia ma ka hāʻawi ʻana i kahi kaʻina hana hoʻomehana hoʻomau.

Maalahi o ka hooponopono

Ma ke ʻano o ka hana a me ka hoʻoponopono ʻana, koi ʻo QCW laser welding i ka hoʻolohe pono ʻana i nā ʻāpana he nui, e like me ka pulse repetition frequency, peak power, pulse width, duty cycle, a me nā mea hou aku. Hoʻomaʻamaʻa ʻo CW laser welding i ke kaʻina hana hoʻoponopono, e kālele nui ana i ka nalu, ka wikiwiki, ka mana, a me ka nui defocus, e hōʻoluʻolu nui i ka paʻakikī o ka hana.

Ka holomua ʻenehana ma CW Laser Welding

ʻOiai ʻike ʻia ka welding laser QCW no kona mana kiʻekiʻe kiʻekiʻe a me ka hoʻokomo wela haʻahaʻa, pono no ka wiliwili ʻana i nā ʻāpana wela a me nā mea i hoʻopaʻa ʻia i ka paia lahilahi, e holomua ana i ka ʻenehana welding laser CW, ʻoi aku hoʻi no nā noi mana kiʻekiʻe (ma mua o 500 watts) a ʻO ka hoʻoheheʻe hohonu hohonu e pili ana i ka hopena keyhole, ua hoʻonui nui ʻia i kāna ʻano noi a me ka pono. Ua kūpono kēia ʻano laser no nā mea ʻoi aku ka mānoanoa ma mua o 1mm, e loaʻa ana i nā lakio hiʻohiʻona kiʻekiʻe (ma luna o 8:1) ʻoiai ke hoʻokomo ʻana i ka wela.

Kuʻi Kuʻi Kuʻekuʻe Kūʻai Kūʻai Kūʻē (QCW).

Hoʻolaha ʻia ka ikehu

ʻO QCW, e kū ana no "Quasi-Continuous Wave," e hōʻike ana i kahi ʻenehana laser kahi e hoʻokuʻu ai ka laser i ke kukui ma ke ʻano ʻole, e like me ka hōʻike ʻana ma ke kiʻi a. ʻAʻole like me ka hāʻawi ʻana i ka ikehu like ʻole o nā laser mau ʻano hoʻokahi, ʻoi aku ka nui o nā laser QCW i ko lākou ikehu. Hāʻawi kēia hiʻohiʻona i nā lasers QCW i ʻoi aku ka ikaika o ka ikehu, e unuhi ana i nā mana komo ikaika. ʻO ka hopena metallurgical e like me ke ʻano "nail" me kahi ratio hohonu-a-ākea koʻikoʻi, e ʻae ana i nā lasers QCW e ʻoi aku ka maikaʻi ma nā noi e pili ana i nā mea hoʻonaninani kiʻekiʻe, nā mea wela, a me ka micro-weld pololei.

Hoʻonui i ke kūpaʻa a me ka hoʻohaʻahaʻa i ka Plume Interference

ʻO kekahi o nā mea maikaʻi i ʻōlelo ʻia o ka welding laser QCW ʻo ia ka hiki ke hoʻēmi i nā hopena o ka plume metala ma ka helu absorption o ka mea, e alakaʻi ana i kahi kaʻina paʻa. I ka wā o ka launa pū ʻana o ka laser-material, hiki i ka evaporation ikaika ke hana i ka hui ʻana o ka mahu metala a me ka plasma ma luna aʻe o ka wai hoʻoheheʻe, i kapa ʻia ʻo ka plume metala. Hiki i kēia plume ke pale i ka ʻili o ka mea mai ka laser, e hoʻokau i ka mana paʻa ʻole a me nā hemahema e like me ka spatter, nā wahi pahū, a me nā lua. Eia nō naʻe, ʻo ka hoʻokuʻu ʻia ʻana o nā lasers QCW (e laʻa, he 5ms burst i ukali ʻia e ka 10ms pause) e hōʻoia i kēlā me kēia pulse laser e hiki i ka ʻili o ka mea me ka ʻole o ka ʻili metala, e hopena i kahi kaʻina hana kuʻihao paʻa, ʻoi aku ka maikaʻi no ka wili pepa lahilahi.

ʻO ka hoʻoheheʻe wai kūpaʻa

ʻO ka dynamics o ka wai hoʻoheheʻe, ʻoi aku ka nui o nā mana e hana ana ma ka keyhole, he mea koʻikoʻi i ka hoʻoholo ʻana i ka maikaʻi o ka weld. ʻO nā laser hoʻomau, ma muli o ko lākou hōʻike lōʻihi ʻana a me nā ʻāpana wela nui aʻe, e hana i nā loko hoʻoheheʻe nui i piha i ka metala wai. Hiki i kēia ke alakaʻi i nā hemahema e pili ana i nā loko hoʻoheheʻe nui, e like me ka hāʻule ʻana o ka puka kī. ʻO ka ʻokoʻa, ʻoi aku ka ikaika o ka ikehu a me ka manawa pōkole o QCW laser welding e hoʻopaʻa i ka wai hoʻoheheʻe a puni ka keyhole, e hopena i ka hāʻawi like ʻana o ka ikaika a me ka haʻahaʻa haʻahaʻa o ka porosity, pohā, a me ka spatter.