Momwe Mungalepheretsere PCB Board Kuti Isapindike Ndi Kupindika Mukadutsa Mu uvuni Wowonjezera

Monga tonse tikudziwa, PCB imakonda kugwada ndi kupindika podutsa mu uvuni wotulukanso.Momwe mungatetezere PCB kuti isapindike ndikuwombana podutsa mu uvuni wa reflow ikufotokozedwa pansipa

1. Kuchepetsa mphamvu ya kutentha pa PCB nkhawa

Popeza "kutentha" ndiye gwero lalikulu la kupsinjika kwa mbale, bola ngati kutentha kwa ng'anjo yobwereranso kumachepetsedwa kapena kutentha ndi kuziziritsa kwa mbale mu ng'anjo ya reflow kumachepetsedwa, kupezeka kwa mbale kupindika ndi kupindika kumatha kuchepetsedwa kwambiri.Komabe, pangakhale zotsatira zina, monga solder short circuit.

2. Pezani mbale ya TG yapamwamba

TG ndi kutentha kwa magalasi, ndiko kuti, kutentha komwe zinthu zimasintha kuchokera ku galasi kupita ku dziko la rubberized.Mtengo wotsika wa TG wazinthuzo, mbaleyo imayamba kufewa mwachangu ikalowa m'ng'anjo ya reflow, ndipo nthawi yotalikirapo kuti ikhale yofewa yofewa, ndiye kuti mbaleyo imapindika kwambiri.Kutha kupirira kupsinjika ndi kusinthika kumatha kukulitsidwa pogwiritsa ntchito mbale yokhala ndi TG yapamwamba, koma mtengo wazinthuzo ndi wokwera kwambiri.

3. Wonjezerani makulidwe a bolodi lozungulira

Zambiri zamagetsi zamagetsi kuti akwaniritse cholinga chowonda, makulidwe a bolodi adasiyidwa 1.0 mm, 0,8 mm, kapena 0,6 mm, makulidwe oterowo kuti asunge bolodi pambuyo pa ng'anjo yotsitsimula sichimapunduka, kwenikweni ndi pang'ono. zovuta, akuti ngati palibe zofunika woonda, bolodi angagwiritse ntchito makulidwe 1.6 mm, amene akhoza kuchepetsa kwambiri chiopsezo kupinda ndi mapindikidwe.

4. Chepetsani kukula kwa bolodi la dera ndi kuchuluka kwa mapanelo

Popeza mavuni ambiri obwezeretsanso amagwiritsira ntchito maunyolo kuyendetsa matabwa ozungulira kutsogolo, kukula kwake kwa bolodi la dera, kumakhala concave kwambiri mu uvuni wa reflow chifukwa cha kulemera kwake.Choncho, ngati mbali yaitali ya bolodi dera aikidwa pa unyolo wa ng'anjo reflow ngati m'mphepete mwa bolodi, concave mapindikidwe chifukwa cha kulemera kwa bolodi dera akhoza kuchepetsedwa, ndipo chiwerengero cha matabwa akhoza kuchepetsedwa kwa chifukwa chake, Ndiko kunena kuti, pamene ng'anjo, yesani ntchito yopapatiza mbali perpendicular malangizo a ng'anjo, akhoza kukwaniritsa otsika sag mapindikidwe.

5. Anagwiritsa ntchito phale

Ngati njira zonse zomwe zili pamwambazi ndizovuta kukwaniritsa, ndikugwiritsa ntchito chonyamulira cha reflow / template kuti muchepetse kupindika.Chifukwa chomwe chonyamulira / template chimatha kuchepetsa kupindika ndi kupindika kwa bolodi ndikuti ngakhale ndikukula kwamafuta kapena kuzizira kozizira, thireyi ikuyembekezeka kugwira bolodi yozungulira.Kutentha kwa bolodi lozungulira kumakhala kotsika kuposa mtengo wa TG ndikuyambiranso kuumitsa, kumatha kukhalabe kukula kozungulira.

Ngati single-wosanjikiza thireyi sangathe kuchepetsa mapindikidwe a bolodi dera, tiyenera kuwonjezera wosanjikiza chivundikiro kuti achepetse bolodi dera ndi zigawo ziwiri za trays, amene kwambiri kuchepetsa mapindikidwe wa bolodi dera kudzera mu uvuni reflow.Komabe, thireyi ya ng'anjoyi ndi yokwera mtengo kwambiri, ndipo ikufunikanso kuwonjezera pamanja ndikuyikanso thireyiyo.

6. Gwiritsani ntchito rauta m'malo mwa V-CUT

Popeza V-CUT idzawononga mphamvu zamapangidwe a matabwa ozungulira, yesetsani kuti musagwiritse ntchito V-CUT kugawanika kapena kuchepetsa kuya kwa V-CUT.