1. Kodi utoto wotsimikizira katatu ndi chiyani?

Mitundu itatu yotsutsa utoto ndi njira yapadera ya utoto, yomwe imagwiritsidwa ntchito kuteteza matabwa ozungulira ndi zida zofananira ndi kukokoloka kwa chilengedwe. Utoto wotsimikizira katatu uli ndi kukana kwabwino kwa kutentha kwakukulu ndi kutentha; imapanga filimu yodzitchinjiriza yowonekera pambuyo pochiritsa, yomwe imakhala yabwino kwambiri, kukana chinyezi, kukana kutayikira, kukana kugwedezeka, kukana fumbi, kukana dzimbiri, kukana kukalamba, kukana kwa corona ndi zina.

Pazifukwa zenizeni, monga mankhwala, kugwedezeka, fumbi lambiri, kutsitsi mchere, chinyezi ndi kutentha kwakukulu, bolodi la dera likhoza kukhala ndi dzimbiri, kufewetsa, mapindikidwe, mildew ndi mavuto ena, omwe angapangitse kuti gulu la dera liwonongeke.

Utoto waumboni wautatu umakutidwa pamwamba pa bolodi la dera kuti upangitse filimu yodzitchinjiriza yokhala ndi umboni itatu (umboni wachitatu umatanthawuza anti-moistness, anti-salt spray and anti-mildew).

Pazifukwa zenizeni, monga mankhwala, kugwedezeka, fumbi lambiri, kutsitsi mchere, chinyezi ndi kutentha kwakukulu, bolodi la dera likhoza kukhala ndi dzimbiri, kufewetsa, mapindikidwe, mildew ndi mavuto ena, omwe angapangitse kuti gulu la dera liwonongeke.

Utoto waumboni wautatu umakutidwa pamwamba pa bolodi la dera kuti upangitse filimu yodzitchinjiriza yokhala ndi umboni itatu (umboni wachitatu umatanthawuza anti-moistness, anti-salt spray and anti-mildew).

2, mfundo ndi zofunika za ndondomeko atatu odana utoto

Zofunikira pakupenta:
1. Kupaka utoto wa utoto: makulidwe a filimu ya utoto amayendetsedwa mkati mwa 0.05mm-0.15mm. The youma filimu makulidwe ndi 25um-40um.

2. Kuphimba kwachiwiri: Pofuna kuonetsetsa kuti makulidwe a mankhwala omwe ali ndi zofunikira zotetezera kwambiri, kuyanika kwachiwiri kungathe kuchitidwa pambuyo poti filimu ya penti yachiritsidwa (onani ngati mukuchita zokutira zachiwiri malinga ndi zofunikira).

3. Kuyang'anira ndi kukonza: fufuzani mowoneka ngati bolodi yotchinga yozungulira ikukwaniritsa zofunikira, ndikukonza vutolo. Mwachitsanzo, ngati mapini ndi malo ena odzitetezera ali odetsedwa ndi utoto wotsimikizira katatu, gwiritsani ntchito ma tweezers kuti mugwire mpira wa thonje kapena thonje loyera loviikidwa m'madzi ochapira kuti muyeretse. Mukamatsuka, samalani kuti musachotse filimu ya penti wamba.

4. Kusintha kwa zigawo: Pambuyo pochiritsidwa filimu ya utoto, ngati mukufuna kusintha zigawozo, mungathe kuchita motere:

(1) Solder zinthuzo mwachindunji ndi chitsulo chamagetsi cha chromium, ndiyeno gwiritsani ntchito nsalu ya thonje yoviikidwa m'madzi kuti muyeretse zinthu zozungulira pad.
(2) Kuwotcherera zigawo zina
(3) Gwiritsani ntchito burashi kuviika utoto wotsimikizira katatu kuti mutsuke mbali yowotcherera, ndikupangitsa kuti filimu ya penti iume ndi kulimba.

Zofunikira pakugwiritsa ntchito:
1. Malo ogwiritsira ntchito utoto wotsimikizira katatu ayenera kukhala opanda fumbi ndi aukhondo, ndipo pasakhale fumbi likuwuluka. Mpweya wabwino uyenera kuperekedwa ndipo ogwira ntchito osayenera saloledwa kulowa.

2. Valani masks kapena masks a gasi, magolovesi a mphira, magalasi oteteza mankhwala ndi zida zina zodzitetezera panthawi yogwira ntchito kuti musavulaze thupi.

3. Ntchitoyo ikatha, yeretsani zida zogwiritsidwa ntchito munthawi yake, ndikutseka ndi kutseka mwamphamvu chidebecho ndi utoto wotsimikizira katatu.

4. Njira zotsutsana ndi static ziyenera kuchitidwa pamagulu ozungulira, ndipo matabwa ozungulira sayenera kupindika. Panthawi yophimba, matabwa ozungulira ayenera kuikidwa mozungulira.

Zofunikira zamtundu:
1. Pamwamba pa bolodi la dera sayenera kukhala ndi kutuluka kwa utoto kapena kudontha. Utotowo ukapakidwa utoto, suyenera kudonthezera pagawo lakutali.

2. Chosanjikiza cha utoto waumboni katatu chiyenera kukhala chathyathyathya, chowala, yunifolomu mu makulidwe, ndi kuteteza pamwamba pa pad, chigamba chigawo kapena conductor.

3. Pamwamba pa utoto wosanjikiza ndi zigawo zikuluzikulu siziyenera kukhala ndi zolakwika monga thovu, pinholes, ripples, mabowo opukutira, fumbi, ndi zina zambiri, ndi zinthu zakunja, palibe choko, chodabwitsa, chodabwitsa, zindikirani: filimuyo isanayambe youma, chitani. osakhudza utoto pakufuna kwa membrane.

4. Zigawo zapang'ono kapena madera sangathe kupakidwa utoto wotsimikizira katatu.

3. Zida ndi zida zomwe sizingapakidwe utoto wofananira

(1) Zipangizo zanthawi zonse zomwe sizimakutidwa: penti yamagetsi yamphamvu kwambiri, sink ya kutentha, chotchingira mphamvu, chotchinga champhamvu, chotchingira simenti, chosinthira ma code, potentiometer (adjustable resistor), buzzer, chotengera batire, chosungira fuse, soketi za IC, kuwala. ma switch switch, ma relay ndi mitundu ina ya sockets, pin headers, terminal blocks and DB9, plug-in kapena SMD light-emitting diode (ntchito yosawonetsa), machubu a digito, mabowo opukutira pansi.

(2) Zigawo ndi zipangizo zomwe zafotokozedwa ndi zojambula zomwe sizingagwiritsidwe ntchito ndi utoto wotsimikizira katatu.
(3) Malinga ndi "Catalogue of Non-Thire-proof Components (Area)", akuti zida zokhala ndi utoto waumboni zitatu sizingagwiritsidwe ntchito.

Ngati zida zanthawi zonse zosavala zotchinga m'malamulo zikuyenera kuphimbidwa, zitha kuphimbidwa ndi zokutira zaumboni zitatu zomwe dipatimenti ya R&D kapena zojambula.

Chachinayi, kusamala kwa njira zitatu zotsutsana ndi kupopera utoto ndi izi

1. PCBA iyenera kupangidwa ndi m'mphepete mwaluso ndipo m'lifupi sikuyenera kukhala osachepera 5mm, kotero kuti ndi yabwino kuyenda pa makina.

2. Kutalika kwakukulu ndi m'lifupi mwa bolodi la PCBA ndi 410 * 410mm, ndipo osachepera ndi 10 * 10mm.

3. Kutalika kwakukulu kwa zigawo zokwera za PCBA ndi 80mm.

4. Mtunda wocheperako pakati pa malo opopera mankhwala ndi malo osapopera a zigawo za PCBA ndi 3mm.

5. Kuyeretsa bwino kungathe kuonetsetsa kuti zotsalira zowonongeka zimachotsedwa kwathunthu, ndikupanga utoto waumboni katatu kumamatira pamwamba pa bolodi la dera bwino. Kuchuluka kwa utoto kumakhala pakati pa 0.1-0.3mm. Zinthu zophika: 60 ° C, 10-20 mphindi.

6. Panthawi yopopera mankhwala, zigawo zina sizingapopedwe, monga: zida zamphamvu zowunikira pamwamba kapena ma radiator, zotsutsa mphamvu, ma diode amagetsi, zopinga za simenti, zosinthira zoyimba, zopinga zosinthika, ma buzzers, chosungira batri, chosungira inshuwaransi (chubu) , chogwirizira IC, switch switch, etc.
V. Chiyambi cha bolodi loyendera maulendo atatu-umboni penti rework

Pamene bolodi la dera liyenera kukonzedwa, zigawo zamtengo wapatali pa bolodi la dera zimatha kuchotsedwa padera ndipo zina zonse zikhoza kutayidwa. Koma njira yowonjezereka ndiyo kuchotsa filimu yotetezera pa zonse kapena gawo la bolodi la dera, ndikusintha zigawo zowonongeka chimodzi ndi chimodzi.

Mukachotsa filimu yotetezera ya utoto wotsimikizira katatu, onetsetsani kuti gawo lapansi pansi pa chigawocho, zipangizo zina zamagetsi, ndi mapangidwe omwe ali pafupi ndi malo okonzanso sizidzawonongeka. Njira zochotsera filimu zotetezera makamaka zimaphatikizapo: kugwiritsa ntchito mankhwala osungunulira mankhwala, micro-akupera, njira zamakina ndi desoldering kudzera mufilimu yoteteza.

Kugwiritsa ntchito mankhwala osungunulira mankhwala ndi njira yomwe imagwiritsidwa ntchito kwambiri kuchotsa filimu yotetezera ya utoto wotsimikizira katatu. Chinsinsi chagona mu mankhwala katundu wa zoteteza filimu kuchotsedwa ndi katundu mankhwala enieni zosungunulira.

Kugaya yaying'ono kumagwiritsa ntchito tinthu tating'onoting'ono tomwe timatuluka mumphuno kuti "apere" filimu yoteteza utoto wotsimikizira katatu pa bolodi lozungulira.

Njira yamakina ndiyo njira yosavuta yochotsera filimu yotetezera ya utoto wotsimikizira katatu. Desoldering kupyolera mu filimu yotetezera ndikutsegula kaye dzenje mufilimu yotetezera kuti zitsulo zosungunuka zitulutsidwe.