ʻIke pili i ka umu Reflow

Reflow umu e pili ana i ka ike

Hoʻohana ʻia ʻo Reflow soldering no ka hui SMT, ʻo ia kahi ʻāpana nui o ke kaʻina hana SMT.ʻO kāna hana ʻo ka hoʻoheheʻe ʻana i ka paʻi solder, hana i nā ʻāpana hui honua a paʻa paʻa i ka PCB.Inā ʻaʻole hiki ke hoʻomalu maikaʻi ʻia, e loaʻa i kahi hopena pōʻino i ka hilinaʻi a me ke ola lawelawe o nā huahana.Nui nā ala o ka reflow welding.ʻO nā ala kaulana mua he infrared a me ke kinoea.I kēia manawa, hoʻohana ka nui o nā mea hana i ka weld reflow wela, a hoʻohana kekahi mau hana kiʻekiʻe a kikoʻī paha i nā ʻano reflow, e like me ka pā wela keʻokeʻo, ke kukui keʻokeʻo, ka umu kūpaʻa, a me nā mea ʻē aʻe.

1. Wela ea reflow kuʻihao

I kēia manawa, ua kapa ʻia ka hapa nui o nā kapuahi hoʻoheheʻe hou i ka convection convection hot air reflow soldering umu.Hoʻohana ʻo ia i ka peʻahi kūloko e puhi i ka ea wela a puni ka pā hui.ʻO kekahi pono o kēia umu ahi, ʻo ia ka hāʻawi ʻana i ka wela i ka pā hui, me ka nānā ʻole i ke kala a me ke ʻano o nā ʻāpana.ʻOiai, ma muli o ka ʻokoʻa o ka mānoanoa a me ka mānoanoa o ka ʻāpana, ʻokoʻa paha ka wela o ka absorption, akā ʻoi aku ka wela o ka umu convection ikaika, a ʻaʻole ʻokoʻa ka ʻokoʻa wela ma ka PCB like.Eia hou, hiki i ka umu ahi ke hoʻomalu pono i ka wela kiʻekiʻe a me ka nui o ka mahana o ke kaʻina wela i hāʻawiʻia, e hāʻawi ana i kahi'āpana maikaʻi aʻe i ka paʻa o ka'āpana a me ke kaʻina hana reflux.

2. Wehewehe ana a me na hana

I ke kaʻina hana o ka hoʻoheheʻe ʻana i ka ea wela, pono ka solder paste e hele i nā pae aʻe: solvent volatilization;ka wehe 'ana o ka oxide ma ka ili o ka weldment;ʻO ka hoʻoheheʻe ʻana o ka solder paste, ka hoʻoheheʻe ʻana a me ka hoʻoluʻu ʻana o ka solder paste, a me ka paʻa.ʻO kahi ʻano wela maʻamau (Profile: pili i ka pihi i hoʻololi ʻia ka mahana o kahi hui solder ma PCB me ka manawa i ka wā e hele ai i loko o ka umu hoʻihoʻi) ua māhele ʻia i kahi preheating, wahi mālama wela, wahi reflow, a me kahi ʻoluʻolu.(e nānā ma luna)

① Wahi hoʻomaha: ʻo ke kumu o ka wahi hoʻomehana ʻo ka hoʻomaʻamaʻa ʻana i ka PCB a me nā ʻāpana, hoʻokō i ke kaulike, a hoʻoneʻe i ka wai a me ka solvent i loko o ka solder paste, i mea e pale ai i ka hāʻule ʻana o ka solder paste a me ka solder spatter.E mālama ʻia ka piʻi ʻana o ka mahana ma loko o kahi kūpono kūpono (ʻo ka wikiwiki loa e hoʻohua i ka haʻalulu wela, e like me ka haki ʻana o ka multilayer ceramic capacitor, splashing of solder, hoʻokumu ʻana i nā pōpō solder a me nā hui solder me ka lawa ʻole o ka solder ma kahi i hoʻopaʻa ʻole ʻia o ka PCB holoʻokoʻa. ʻO ka lohi loa e hoʻonāwaliwali i ka hana o ka flux).ʻO ka maʻamau, ʻo ka nui o ka piʻi ʻana o ka mahana he 4 ℃ / sec, a ʻo ka piʻi ʻana o ka piʻi ʻana i hoʻonohonoho ʻia e like me 1-3 ℃ / sec, ʻo ia ka maʻamau o ECs ʻoi aku ma mua o 3 ℃ / sec.

② Wahi mālama wela (hana): pili i ka ʻāpana mai 120 ℃ a 160 ℃.ʻO ke kumu nui ka hana ʻana i ka mahana o kēlā me kēia ʻāpana ma ka PCB e like me ka like, e hoʻemi i ka ʻokoʻa wela e like me ka hiki, a e hōʻoia i ka maloʻo loa o ka solder ma mua o ka hiki ʻana i ka mahana reflow.Ma ka hopena o ka wahi insulation, e wehe ʻia ka oxide ma ka solder pad, solder paste ball, a me ka pine ʻāpana, a e kaulike ka mahana o ka papa kaapuni holoʻokoʻa.ʻO ka manawa hana ma kahi o 60-120 kekona, ma muli o ke ʻano o ka solder.Kūlana ECS: 140-170 ℃, max120sec;

③ Reflow zone: ua hoʻonohonoho ʻia ka mahana o ka mea hoʻomehana ma kēia wahi i ka pae kiʻekiʻe.ʻO ka wela kiʻekiʻe o ka welding e pili ana i ka solder paste i hoʻohana ʻia.Manaʻo ʻia e hoʻohui i ka 20-40 ℃ i ka mahana heheʻe o ka paʻi solder.I kēia manawa, hoʻomaka ka solder i loko o ka solder paste e heheʻe a kahe hou, e hoʻololi ana i ke kahe wai e hoʻomaʻemaʻe i ka pad a me nā ʻāpana.I kekahi manawa, ua māhele ʻia ka ʻāina i ʻelua mau ʻāpana: ka ʻāina hoʻoheheʻe a me ka ʻāina reflow.ʻO ka pihi wela kūpono ʻo ia ka wahi i uhi ʻia e ka "ʻaoʻao ʻaoʻao" ma waho o ka helu heheʻe o ka mea kūʻai aku ka liʻiliʻi loa a me ka symmetrical, ma ke ʻano, ʻo ka manawa ma luna o 200 ℃ he 30-40 sec.ʻO ka maʻamau o ECS he peak temp.: 210-220 ℃, ka lōʻihi o ka manawa ma luna o 200 ℃: 40 ± 3sec;

④ ʻĀpana hoʻoluʻu: ʻo ka hoʻoluʻu ʻana i ka wikiwiki e hiki ke kōkua i ka loaʻa ʻana o nā hui solder mālamalama me ke ʻano piha a me ke kihi pili haʻahaʻa.ʻO ka hoʻoluʻu lohi e alakaʻi i ka hoʻoheheʻe hou ʻana o ka pā i loko o ke kī, ka hopena i nā hui solder hina a ʻeleʻele, a ke alakaʻi nei hoʻi i ka ʻeleʻele kino maikaʻi ʻole a me ka hoʻopili ʻana o ka solder adhesion.ʻO ka nui o ka hoʻoluʻu ʻana i loko o - 4 ℃ / sec, a hiki ke hoʻomaha ʻia ma kahi o 75 ℃.ʻO ka maʻamau, koi ʻia ka hoʻoluʻu hoʻoluʻu ʻana e ka peʻahi hoʻoluʻu.

3. ʻO nā mea like ʻole e pili ana i ka hana wili

Nā kumu ʻenehana

Welding pretreatment ala, ʻano lapaʻau, ʻano, mānoanoa, helu o nā papa.Inā hoʻomaʻamaʻa ʻia, ʻoki ʻia a hana ʻia paha ma nā ʻano ʻē aʻe i ka manawa mai ka mālama ʻana i ka welding.

Hoʻolālā o ke kaʻina hana kuʻi

Welding wahi: e pili ana i ka nui, āpau, kaʻa alakaʻi kāʻei (wiring): ʻano, thermal conductivity, ka wela wela o ka mea welded: pili i ke kuhikuhi kuʻekuʻe, kūlana, kaomi, kūlana paʻa, etc.

Nā kūlana wili

E pili ana i ka wela wela a me ka manawa, nā kūlana preheating, ka hoʻomehana, ka wikiwiki hoʻoluʻu, ke ʻano hoʻomehana welding, ke ʻano lawe o ke kumu wela (ka lōʻihi o ka hawewe, ka wikiwiki conduction wela, etc.)

mea wiliwili

ʻO Flux: haku mele, hoʻopaʻa ʻana, hana, helu heheʻe, kahi paila, etc

Solder: haku mele, ʻano, ʻike haumia, helu heheʻe, etc

Metala kumu: haku mele ʻana, hoʻolālā a me ka hoʻoili wela o ka metala kumu

ʻO ka viscosity, ka umekaumaha kikoʻī a me nā waiwai thixotropic o ka solder paste

Material substrate, type, cladding metal, etc.

ʻatikala a me nā kiʻi mai ka pūnaewele, inā he hewa e hoʻopili mua iā mākou e holoi.
Hāʻawi ʻo NeoDen i nā ʻōnaehana laina SMT piha, e komo pū ana i ka umu SMT reflow, ka mīkini hoʻoheheʻe nalu, ka mīkini koho a me ka wahi, ka mīkini paʻi solder, PCB loader, PCB unloader, chip Mounter, SMT AOI mīkini, SMT SPI mīkini, SMT X-Ray mīkini, ʻO nā lako laina hui SMT, nā lako hana PCB SMT ʻāpana ʻāpana, a me nā ʻano mīkini SMT āu e pono ai, e ʻoluʻolu e kelepona mai iā mākou no ka ʻike hou aku:

ʻO Hangzhou NeoDen Technology Co., Ltd

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