1. Kodi SMT solder phala bwanji solder quality?
The flux mass ratio ndi kapangidwe ka solder paste flux zigawo:
(1) Zinthu zopanga mafilimu: 2% ~ 5%, makamaka rosin, ndi zotumphukira, zopangira, zomwe zimagwiritsidwa ntchito kwambiri ndi rosin yoyera yamadzi.
(2) Activator: 0.05% ~ 0.5%, activators ambiri ntchito zidulo dicarboxylic, zidulo apadera carboxylic, ndi organic halide mchere.
(3) Thixotropic wothandizira: 0,2% ~ 2%, kumawonjezera mamasukidwe akayendedwe ndikuchita ngati kuyimitsidwa.Pali zinthu zambiri zotere, makamaka mafuta a castor, hydrogenated castor oil, ethylene glycol mono butylene, ndi carboxymethyl cellulose.
(4) Zosungunulira: 3% ~ 7%, magawo ambiri, okhala ndi mfundo zowira zosiyanasiyana.
(5) Ena: ma surfactants, othandizira othandizira.
Mphamvu ya solder paste flux pamtundu wa soldering:
Kuphulika kwa malata, kuwotcherera kwachitsulo, mabuku a mpira (BGA) opanda kanthu, kutsekereza, ndi zina zosauka za SMT chip processing ndi kuwotcherera zili ndi ubale wabwino ndi mapangidwe a solder phala.Kusankhidwa kwa phala la solder kuyenera kusankhidwa molingana ndi machitidwe a msonkhano wadera losindikizidwa (PCBA).Gawo la ufa wa solder limathandizira kwambiri pakuwongolera magwiridwe antchito komanso kukhuthala.Kuchuluka kwa ufa wa solder, kumachepetsa kutsika.Choncho, solder phala ntchito zabwino-phula zigawo zikuluzikulu ayenera kugwiritsa ntchito 88% ~ 92% more solder ufa zili solder phala.
1. The activator amatsimikiza solderability kapena wettability wa solder phala.Kuti mukwaniritse kutsekemera kwabwino, payenera kukhala activator yoyenera mu solder phala, makamaka pankhani ya micro-pad soldering, ngati ntchitoyo ndi yosakwanira, ikhoza kuyambitsa zochitika za mpira wa mphesa ndi zolakwika za mpira.
2. Zinthu zopanga filimu zimakhudza kuyeza kwa ma solder ndi kukhuthala ndi kukhuthala kwa solder phala.
3. Flux amagwiritsidwa ntchito kwambiri kusungunula ma activator, zinthu zopanga filimu, thixotropic agents, etc. The flux in solder phala nthawi zambiri imakhala ndi zosungunulira zosiyanasiyana zowira.Cholinga chogwiritsa ntchito zosungunulira zotentha kwambiri ndikuletsa solder ndi flux kuti zisagwe pa nthawi ya reflow soldering.
4. Thixotropic wothandizira amagwiritsidwa ntchito popititsa patsogolo ntchito yosindikiza ndi ntchito yokonza.
2. Kodi ndi zinthu ziti zomwe zimakhudza magwiridwe antchito a SMT?
Kuzungulira kwa malo kumatanthawuza nthawi yomwe imatengera mutu woyika zida kuti uyambe kuwerengera pamene Wodyetsa amatenga zigawozo, pambuyo pozindikira zithunzi za zigawozo, cantilever imasunthira kumalo ogwirizana, oyendetsa ntchito amaika zigawozo mu bolodi la PCB. , ndiyeno amabwerera ku Wodyetsa kudyetsa malo.Ndi kuzungulira kwa malo;nthawi yomwe imagwiritsidwa ntchito poyikirayi ndiyonso yofunika kwambiri yomwe imakhudza kuthamanga kwa makina oyika.Kuyika kwa makina oyika ma cantilever othamanga kwambiri pakuyika zida zolimbikitsira nthawi zambiri kumakhala mkati mwa 1.0s.Pakalipano, kuyika kwa SMT Kuzungulira kwa cantilever mounter yothamanga kwambiri mumakampani opanga chip ndi pafupifupi 0.5s;kuzungulira kwa ma ICs akulu, ma BGA, zolumikizira, ndi ma aluminium electrolytic capacitors ndi pafupifupi 2s.
Zomwe zimakhudza nthawi yoyika:
Mlingo wa kulunzanitsa wa kutolera zigawo (ndiko kuti, ndodo zingapo zolumikizirana za mutu woyika zimakwera ndikugwa nthawi imodzi kuti zitenge zigawo).
Kukula kwa bolodi la PCB (kukulira kwa bolodi la PCB, kukulirapo kwa X/Y kusuntha kwa mutu wakuyika, komanso nthawi yayitali yogwira ntchito).
Chigawo choponyera mlingo (ngati gawo lachifaniziro silinakhazikitsidwe bwino, kuponyera zipangizo ndi zochita zosavomerezeka za X / Y zidzachitika panthawi yozindikiritsa chithunzi cha zigawo).
Chipangizochi chimayika mtengo wothamanga wa X/Y/Z/R.
3. Momwe mungasungire moyenera ndikugwiritsa ntchito phala la solder mu fakitale ya SMT patch processing?
1. Pamene phala la solder silikugwiritsidwa ntchito, liyenera kusungidwa mufiriji, ndipo kutentha kwake kosungirako kuyenera kukhala mkati mwa 3 ~ 7 ° C.Chonde dziwani kuti phala la solder silingathe kuzizira pansi pa 0 ° C.
2. Pakhale choyezera choyezera kutentha mufiriji kuti chizindikire kutentha kosungidwa maola 12 aliwonse ndikulemba.Thermometer iyenera kuyang'aniridwa pafupipafupi kuti isalephereke, ndipo zolemba zoyenera ziyenera kupangidwa.
3. Pogula solder phala, m'pofunika muiike tsiku kugula kusiyanitsa magulu osiyanasiyana.Malinga ndi dongosolo la SMT chip processing, ndikofunikira kuwongolera kagwiritsidwe ntchito ka phala la solder, ndipo zowerengerazo zimayendetsedwa mkati mwa masiku 30.
4. Solder phala yosungirako ayenera kusungidwa padera malinga ndi mitundu yosiyanasiyana, manambala batch, ndi opanga osiyana.Pambuyo pogula phala la solder, liyenera kusungidwa mufiriji, ndipo mfundo yoyamba, yoyamba iyenera kutsatiridwa.
4. Kodi zifukwa ozizira kuwotcherera PCBA processing
1. Kutentha kwa reflow ndi kochepa kwambiri kapena nthawi yokhalamo pa kutentha kwa reflow soldering ndi yochepa kwambiri, zomwe zimapangitsa kutentha kosakwanira panthawi yowonjezereka komanso kusungunuka kosakwanira kwa ufa wachitsulo.
2. Mu gawo lozizira, mpweya wozizira kwambiri, kapena kuyenda kwa lamba wosasinthasintha wa conveyor kumasokoneza mgwirizano wa solder, ndipo umapereka mawonekedwe osagwirizana pamwamba pazitsulo zogulitsira, makamaka pa kutentha pang'ono kuposa malo osungunuka, pamene solder ndi yofewa kwambiri.
3. Kuyipitsidwa kwa pamwamba ndi kuzungulira pa mapepala kapena zotsogolera zimatha kulepheretsa kusuntha, zomwe zimapangitsa kuti kusefukiranso kosakwanira.Nthawi zina ufa wosasungunuka wa solder ukhoza kuwonedwa pamwamba pa mgwirizano wa solder.Panthawi imodzimodziyo, kusakwanira kutulutsa mphamvu kumapangitsanso kuchotsedwa kosakwanira kwazitsulo zachitsulo ndi condensation yosakwanira.
4. Ubwino wa solder zitsulo ufa si wabwino;ambiri a iwo amapangidwa ndi encapsulation kwambiri oxidized ufa particles.
5. Momwe Mungayeretsere Msonkhano wa PCB mu Njira Yotetezeka komanso Yopambana
Kuyeretsa PCB misonkhano ayenera kugwiritsa ntchito zotsukira bwino kwambiri ndi zosungunulira zosungunulira, zomwe zimadalira bolodi zofunika.Apa, njira zosiyanasiyana zoyeretsera PCB ndi zabwino ndi zoyipa zake zikuwonetsedwa.
1. Akupanga PCB Kuyeretsa
Makina otsuka akupanga PCB amatsuka ma PCB opanda kanthu mwachangu popanda kuyeretsa zosungunulira, ndipo iyi ndi njira yotsika mtengo kwambiri yoyeretsera PCB.Kupatula apo, njira yoyeretserayi siyimalepheretsa kukula kwa PCB kapena kuchuluka kwake.Komabe, izo sizingakhoze kuyeretsa PCB msonkhano chifukwa akupanga akhoza kuvulaza zipangizo zamagetsi ndi msonkhano.Komanso sangathe kuyeretsa Azamlengalenga / chitetezo PCB chifukwa akupanga zingakhudze bolodi magetsi mwatsatanetsatane.
2. Full basi Pa Intaneti PCBA Kuyeretsa
The zonse basi pa Intaneti PCBA zotsukira ndi koyenera kuyeretsa mabuku ambiri PCB msonkhano.Zonse za PCB ndi PCBA zitha kutsukidwa, ndipo sizikhudza kulondola kwa matabwa.Ma PCBA amadutsa mabowo odzaza ndi zosungunulira kuti amalize njira zoyeretsera madzi opangira madzi, kutsuka madzi, kuyanika, ndi zina zotero.Izi PCBA kuyeretsa njira amafuna zosungunulira kuti n'zogwirizana ndi zigawo zikuluzikulu, PCB pamwamba, solder chigoba, etc. Ndipo tiyeneranso kulabadira zigawo zapadera ngati iwo sangathe kutsukidwa.Zamlengalenga ndi zachipatala PCB zitha kuyeretsedwa motere.
3. Theka Makinawa PCBA Kuyeretsa
Mosiyana ndi PCBA zotsukira Intaneti, theka-automatic zotsukira akhoza kunyamulidwa pamanja pa malo aliwonse a msonkhano mzere, ndipo ali ndi patsekeke mmodzi.Ngakhale njira zake zoyeretsera ndizofanana ndi kuyeretsa kwa PCBA pa intaneti, njira zonse zimachitika pabowo limodzi.Ma PCBA amafunika kukhazikitsidwa ndi choyikapo kapena kuyikidwa mudengu, ndipo kuchuluka kwawo kuli kochepa.
4. Buku PCBA Kuyeretsa
Buku lotsukira la PCBA ndiloyenera PCBA yaing'ono yomwe imafuna zosungunulira za MPC.PCBA imamaliza kuyeretsa madzi opangidwa ndi mankhwala osamba nthawi zonse.
Timasankha njira yoyenera kwambiri ya PCBA yoyeretsa malinga ndi zofunikira za PCBA.