..1: Jambulani chithunzi chojambula.
..2: Pangani gawo la library.
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..4: Njira ndi kuyika.
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.. Mutatha kudziwa malo ndi mawonekedwe a zigawo pa PCB, ganizirani masanjidwe a PCB.
1. Ndi malo a chigawocho, wiring ikuchitika molingana ndi malo a chigawocho.Ndi mfundo yakuti waya pa bolodi losindikizidwa ndi lalifupi momwe angathere.Zotsatira zake ndi zazifupi, ndipo njira ndi malo omwe akukhalamo ndizochepa, kotero kuti chiwerengero chodutsa chidzakhala chokwera.Mawaya a chotengera cholowera ndi chotuluka pa bolodi la PCB ayesetse kupewa kukhala moyandikana wina ndi mnzake, ndipo ndi bwino kuyika waya pansi pakati pa mawaya awiriwa.Kuti mupewe kulumikizana kwa mayankho ozungulira.Ngati bolodi losindikizidwa ndi bolodi lamitundu yambiri, njira yoyendetsera mzere wa mzere uliwonse ndi yosiyana ndi ya gulu loyandikana nalo.Kwa mizere yofunikira yofunika kwambiri, muyenera kukwaniritsa mgwirizano ndi wopanga mzere, makamaka mizere yosiyanitsa yosiyana, iyenera kuyendetsedwa pawiri, yesetsani kuwapanga kukhala ofanana ndi kutseka, ndipo kutalika kwake sikusiyana kwambiri.Zigawo zonse pa PCB ziyenera kuchepetsa ndikufupikitsa mayendedwe ndi kulumikizana pakati pa zigawo.The osachepera m'lifupi mawaya mu PCB makamaka anatsimikiza ndi adhesion mphamvu pakati mawaya ndi insulating wosanjikiza gawo lapansi ndi mtengo panopa ikuyenda mwa iwo.Pamene makulidwe a zojambulazo zamkuwa ndi 0.05mm ndipo m'lifupi mwake ndi 1-1.5mm, kutentha sikudzakhala kwakukulu kuposa madigiri a 3 pamene panopa 2A yadutsa.Pamene waya m'lifupi ndi 1.5mm, akhoza kukwaniritsa zofunika.Kwa mabwalo ophatikizika, makamaka mabwalo a digito, 0.02-0.03mm nthawi zambiri amasankhidwa.Inde, malinga ngati akuloledwa, timagwiritsa ntchito mawaya ambiri momwe tingathere, makamaka mawaya amphamvu ndi mawaya apansi pa PCB.Mtunda wocheperako pakati pa mawaya umatsimikiziridwa makamaka ndi kukana kwa kutchinjiriza ndi kusweka voteji pakati pa mawaya poipa kwambiri.
Kwa mabwalo ena ophatikizika (IC), phula limatha kukhala laling'ono kuposa 5-8mm malinga ndiukadaulo.Kupindika kwa waya wosindikizidwa nthawi zambiri kumakhala kocheperako kwambiri, ndipo kugwiritsa ntchito ma degree osachepera 90 kuyenera kupewedwa.Mbali yoyenera ndi yophatikizidwa idzakhudza momwe magetsi amayendera mumayendedwe apamwamba kwambiri.Mwachidule, mawaya a bolodi losindikizidwa ayenera kukhala ofanana, wandiweyani komanso osasinthasintha.Yesetsani kupeŵa kugwiritsa ntchito zojambulazo zamkuwa zazikuluzikulu mu dera, mwinamwake, pamene kutentha kumapangidwa kwa nthawi yaitali pakugwiritsa ntchito, zojambulazo zamkuwa zidzakula ndikugwa mosavuta.Ngati payenera kugwiritsidwa ntchito chojambula chachikulu cha mkuwa, mawaya ooneka ngati gululi angagwiritsidwe ntchito.The terminal ya waya ndi pad.Bowo lapakati la pad ndilokulirapo kuposa kukula kwa chipangizocho.Ngati pediyo ndi yayikulu kwambiri, ndizosavuta kupanga weld wowotcherera pakuwotcherera.Kunja kwa D kwa pad nthawi zambiri sikuchepera (d+1.2) mm, pomwe d ndiye pobowo.Pazigawo zina zokhala ndi kachulukidwe kakang'ono, kutalika kocheperako kwa pad ndikofunikira (d+1.0) mm, mapangidwe a pad akamalizidwa, chimango cha chipangizocho chiyenera kujambulidwa mozungulira pa bolodi losindikizidwa, ndi malemba ndi zilembo ziyenera kulembedwa nthawi imodzi.Nthawi zambiri, kutalika kwa mawu kapena chimango kuyenera kukhala pafupifupi 0.9mm, ndipo m'lifupi mwake mzere uyenera kukhala pafupifupi 0.2mm.Ndipo mizere monga zolembedwa ndi zilembo siziyenera kukanikizidwa pa pad.Ngati ili ndi bolodi yokhala ndi magawo awiri, mawonekedwe apansi ayenera kuwonetsa chizindikirocho.
Chachiwiri, kuti zinthu zomwe zidapangidwazo zizigwira ntchito bwino komanso mogwira mtima, PCB iyenera kuganizira mphamvu zake zotsutsana ndi kusokoneza pakupanga, ndipo ili ndi ubale wapamtima ndi dera linalake.
Mapangidwe a mzere wamagetsi ndi mzere wapansi mu bolodi la dera ndilofunika kwambiri.Malingana ndi kukula kwa magetsi omwe akuyenda kudzera m'mabwalo osiyanasiyana ozungulira, m'lifupi mwake mzere wamagetsi uyenera kuwonjezeka momwe mungathere kuti muchepetse kukana kwa loop.Panthawi imodzimodziyo, chitsogozo cha mzere wa mphamvu ndi mzere wapansi ndi deta Njira yotumizira imakhala yofanana.Thandizani kupititsa patsogolo mphamvu zotsutsana ndi phokoso la dera.Pali mabwalo onse omveka komanso mabwalo ozungulira pa PCB, kotero kuti amalekanitsidwa momwe angathere.Dera locheperako limatha kulumikizidwa molumikizana ndi mfundo imodzi.Mawaya enieni amatha kulumikizidwa mndandanda ndiyeno nkulumikizidwa mofanana.Waya wapansi uyenera kukhala wamfupi komanso wandiweyani.Zojambula zazikulu zapansi zimatha kugwiritsidwa ntchito mozungulira zigawo zapamwamba kwambiri.Waya wapansi uyenera kukhala wokhuthala momwe ungathere.Ngati waya wapansi ndi woonda kwambiri, mphamvu ya pansi idzasintha ndi zamakono, zomwe zidzachepetse ntchito yotsutsana ndi phokoso.Choncho, waya wapansi uyenera kukulitsidwa kuti ufike pamtunda wovomerezeka pa bolodi la dera. lupu kuti muwonjezere luso la anti-phokoso.Pamapangidwe a PCB, ma capacitor oyenerera amakonzedwa m'magawo akulu a bolodi yosindikizidwa.10-100uF electrolytic capacitor yolumikizidwa pamzere kumapeto kwa magetsi.Nthawi zambiri, 0.01PF maginito chip capacitor iyenera kukonzedwa pafupi ndi pini yamagetsi ya chipangizo chophatikizika chophatikizana ndi mapini 20-30.Kwa tchipisi tokulirapo, chiwongolero champhamvu Padzakhala zikhomo zingapo, ndipo ndi bwino kuwonjezera cholumikizira pafupi nawo.Pa chip chokhala ndi mapini opitilira 200, onjezani ma capacitor odulira osachepera awiri mbali zake zinayi.Ngati kusiyana sikukwanira, 1-10PF tantalum capacitor ikhoza kukonzedwanso pa tchipisi 4-8.Pazigawo zomwe zili ndi mphamvu zofooka zotsutsana ndi kusokoneza ndi kusintha kwakukulu kwa mphamvu, cholumikizira cholumikizira chiyenera kulumikizidwa mwachindunji pakati pa mzere wamagetsi ndi mzere wapansi wa chigawocho., Ziribe kanthu kuti ndimtundu wanji wotsogola wolumikizidwa ndi capacitor pamwambapa, sikophweka kukhala motalika kwambiri.
3. Pambuyo pa chigawo ndi mapangidwe a chigawo cha chigawo cha chigawo chatha, ndondomeko yake iyenera kuganiziridwa pambuyo pake, kuti athetse mitundu yonse ya zinthu zoipa asanayambe kupanga, ndipo panthawi imodzimodziyo, aganizire kupanga manufacturability. gulu lozungulira kuti apange zinthu zapamwamba kwambiri.ndi kupanga zochuluka.
.. Polankhula za kuyimitsidwa ndi mawaya a zigawo, mbali zina za ndondomeko ya bolodi la dera zakhala zikukhudzidwa.Kapangidwe ka bolodi laderali makamaka kusonkhanitsa gulu lozungulira ndi zigawo zomwe tapanga kudzera mumzere wopanga ma SMT, kuti tikwaniritse kulumikizana kwamagetsi kwabwino ndikukwaniritsa masanjidwe azinthu zomwe tapanga.Pad kapangidwe, mawaya ndi odana kusokoneza, etc. ayeneranso kuganizira ngati bolodi tinapanga n'zosavuta kupanga, kaya akhoza anasonkhana ndi luso lamakono msonkhano-SMT luso, ndipo nthawi yomweyo, m'pofunika kukumana ndi kusalola kuti zinthu zolakwika zipangidwe panthawi yopanga.apamwamba.Makamaka, pali mbali zotsatirazi:
1: Mizere yopangira ma SMT yosiyana imakhala ndi zinthu zosiyanasiyana zopanga, koma malinga ndi kukula kwa PCB, kukula kwa bolodi limodzi la PCB sikuchepera 200 * 150mm.Ngati mbali yayitali ndi yaying'ono, kuyika kungagwiritsidwe ntchito, ndipo chiŵerengero cha kutalika ndi m'lifupi ndi 3: 2 kapena 4: 3.Pamene kukula kwa bolodi la dera ndi lalikulu kuposa 200 × 150mm, mphamvu yamakina ya bolodi yozungulira iyenera kuganiziridwa.
2: Pamene kukula kwa bolodi la dera kuli kochepa kwambiri, zimakhala zovuta kuti ntchito yonse yopanga mzere wa SMT ikhale yovuta, ndipo sizovuta kupanga magulu.Njira yabwino ndiyo kugwiritsa ntchito mawonekedwe a bolodi, omwe ndi kuphatikiza 2, 4, 6 ndi matabwa ena amodzi molingana ndi kukula kwa bolodi.Kuphatikizidwa pamodzi kuti mupange bolodi lonse loyenera kupanga misa, kukula kwa bolodi lonse kuyenera kukhala koyenera kukula kwa gulu lokhazikika.
3: Kuti agwirizane ndi kuyika kwa mzere wopanga, veneer iyenera kusiya 3-5mm popanda zigawo zilizonse, ndipo gululo liyenera kusiya njira ya 3-8mm.Pali mitundu itatu yolumikizana pakati pa m'mphepete mwa njira ndi PCB: A popanda kuphatikizika, Pali thanki yolekanitsa, B ili ndi mbali ndi thanki yolekanitsa, ndipo C ili ndi mbali ndipo palibe thanki yolekanitsa.Okonzeka ndi zida pokhomerera.Malinga ndi mawonekedwe a bolodi la PCB, pali mitundu yosiyanasiyana ya ma jigsaw board, monga Youtu.The ndondomeko mbali ya PCB ali njira osiyana malo malinga ndi zitsanzo zosiyanasiyana, ndipo ena amakhala mabowo pa mbali ndondomeko.Kutalika kwa dzenje ndi 4-5 cm.Kunena zoona, malo olondola ndi apamwamba kuposa a mbali, kotero pali Chitsanzo chokhala ndi dzenje chiyenera kuperekedwa ndi mabowo pa nthawi ya PCB, ndipo mapangidwe a dzenje ayenera kukhala ofanana kuti apewe zovuta kupanga.
4: Kuti malo bwino ndi kukwaniritsa apamwamba kukwera molondola, m'pofunika kukhazikitsa mfundo Buku kwa PCB.Kaya pali malo ofotokozera komanso ngati malowa ali abwino kapena ayi adzakhudza mwachindunji kupanga kwakukulu kwa mzere wopangira SMT.Maonekedwe a mfundo zolozera akhoza kukhala lalikulu, zozungulira, triangular, etc. Ndipo m'mimba mwake ayenera kukhala mu osiyanasiyana 1-2mm, ndi ozungulira mfundo yolozera ayenera kukhala mkati osiyanasiyana 3-5mm, popanda zigawo zikuluzikulu ndi. amatsogolera.Panthawi imodzimodziyo, malo ofotokozera ayenera kukhala osalala komanso osalala popanda kuipitsa kulikonse.Mapangidwe a malo owonetsera sayenera kukhala pafupi kwambiri ndi m'mphepete mwa bolodi, payenera kukhala mtunda wa 3-5mm.
5: Kutengera momwe ntchito ikupangidwira, mawonekedwe a bolodi amakhala owoneka ngati phula, makamaka pakuwotchera mafunde.Amakona anayi kuti apereke mosavuta.Ngati pa bolodi la PCB pali nsonga yosowa, malo osowawo ayenera kudzazidwa mu mawonekedwe a m'mphepete mwa njira, ndipo gulu limodzi la SMT limaloledwa kukhala ndi poyambira.Koma malo osowa siwophweka kukhala aakulu kwambiri ndipo ayenera kukhala osachepera 1/3 ya kutalika kwa mbali.
Nthawi yotumiza: May-06-2023