Parizvino, pane akasiyana e Pcb bhodhi mumusika mumhando dzakasiyana-siyana dzinopenya. Zvimwe zvakajairika pcb bhodhi mavara ndeegirinhi, dema, bhuruu, yero, yepepuru, tsvuku uye brown, vamwe vagadziri zvakare zvakagadzira chena, pingi uye mamwe mavara akasiyana ePBB.

Vakasiyana ruvara pcb bhodhi sumo

Inowanzo davirwa kuti nhema pcb inoita kunge yakamiswa pakakwirira, nepo tsvuku, yero zvichingodaro zvakachengeterwa ezasi magumo. Ichokwadi here ichocho?

Mukugadzirwa kwePBB, rukoko rwemhangura, ingave yakaitwa nekuwedzera kana kubvisa, inoguma neyakaenzana uye isina dziviriro pamusoro. Kunyangwe iyo makemikari ehupfumi emhangura isiri seanoshanda sealuminium, iron, magnesium uye zvichingodaro, asi mune mamiriro emvura, yakachena mhangura neoksijeni kusangana iri nyore oxidized; Nekuda kwekuvapo kwe oxygen nemhute yemvura mumhepo, pamusoro pemhangura yakachena inozoita oxidize nekukurumidza painosangana nemhepo. Nekuti iyo hukobvu hwendarira nhete mubhodhi rePCB rakatetepa, iyo oxidized mhangura inozoita yakaipa conductor yemagetsi, inozokuvadza zvakanyanya mashandiro emagetsi ePBB yese.

Kudzivirira mhangura oxidation, kupatsanura iwelded uye isina-welded zvikamu zvePCB panguva yekumonera, uye kuchengetedza pamusoro pebhodhi rePCB, mainjiniya ekugadzira akagadzira yakakosha yekupfeka. Uku kupfeka kunogona kushandiswa nyore nyore pamusoro pebhodhi rePCB, ichigadzira dziviriro yeimwe hukobvu uye ichivhara kusangana pakati pemhangura nemhepo. Iyi nhete yekupfeka inonzi solder ichivharira uye chinhu chinoshandiswa isolder ichivhara pendi.

Kana ichinzi pendi, inofanira kunge iri rumwe ruvara. Hongu, pendi isina kugadzirwa isina kugadzirwa inogona kuitwa isina ruvara uye yakajeka, asi PCBS kazhinji inoda kupurinda zvinyorwa zvidiki pabhodhi kuitira nyore kugadzirisa uye kugadzira. Transparent solder kuramba pendi inogona kungoratidza pcb kumashure, saka kunyangwe kugadzira, kugadzirisa kana kutengesa, chitarisiko hachina kukwana. Saka mainjiniya anowedzera akasiyana mavara kune iyo solder inoramba pendi, zvichikonzera nhema kana tsvuku kana bhuruu PCBS. Nekudaro, zvinonetsa kuona wiring yevatema pcb, saka pachave nematambudziko mukugadzirisa.

Kubva ino maonero, iyo pcb bhodhi ruvara uye pcb mhando haina hukama. Musiyano uripo pakati peblack pcb neblue pcb, yero pcb uye imwe ruvara pcb iri mune ruvara rwekupikisa pendi pane yekupedzisira bhurasho. Kana iyo pcb yakagadzirwa uye kugadzirwa zvakangofanana, iwo ruvara haruzove nemhedzisiro pane kuita, uyezve haruzove nemhedzisiro pakupisa kupisa. Kana iri yePCB nhema, iyo yepamusoro wiring inenge yakafukidzwa zvizere, izvo zvinokonzeresa kuoma kukuru kune iyo yekupedzisira kugadzirisa, saka hazvisi nyore kwazvo kugadzira nekushandisa iyo vara. Naizvozvo, mumakore achangopfuura, vanhu vanochinja zvishoma nezvishoma, voregedza pendi nhema yekunamatira, kushandisa yakasvibirira, yakasviba, bhuruu nerima uye pendi, iyo chinangwa kugadzira kugadzira uye kugadzirisa.

Kutaura nezvazvo, isu takanyatsonzwisisa dambudziko rePCB color. Kana iri kutaura kuti “ruvara runomiririra yakakwira giredhi kana yakaderera giredhi”, imhaka yekuti vagadziri vanofarira kushandisa nhema pcb kugadzira zvigadzirwa zvemhando yepamusoro, uye vanoshandisa tsvuku, bhuruu, girini, yero nezvimwe zvigadzirwa zvakaderera.Mhedziso ndeiyi: chigadzirwa chinopa chirevo chevara, pane kuti ruvara ruve nechigadzirwa zvinoreva.