Chifukwa chiyani PCBA Board Deform?

M'kati mwareflow uvunindimakina opangira ma wave soldering, PCB bolodi adzakhala olumala chifukwa chikoka cha zinthu zosiyanasiyana, chifukwa osauka PCBA kuwotcherera.Tidzangosanthula zomwe zimayambitsa kusinthika kwa bolodi la PCBA.

1. Kutentha kwa PCB board kudutsa ng'anjo

Bolodi lililonse ladera lidzakhala ndi mtengo wapamwamba wa TG.Kutentha kwa uvuni wa reflow kukakwera kwambiri, kupitilira kuchuluka kwa TG kwa board board, bolodi imafewetsa ndikuyambitsa kupunduka.

2. PCB bolodi

Chifukwa cha kutchuka kwa teknoloji yopanda chitsogozo, kutentha kwa ng'anjo kumakhala kwakukulu kuposa kutsogolo, ndipo zofunikira za mbale ndizokwera kwambiri.Kutsika kwa mtengo wa TG, m'pamenenso kuti gulu lozungulira liwonongeke panthawi ya ng'anjo, koma mtengo wa TG umakhala wokwera mtengo kwambiri.

3. The makulidwe a bolodi PCBA

Ndi chitukuko cha zinthu zamagetsi ku mbali yaing'ono ndi yopyapyala, makulidwe a bolodi lozungulira akukhala ochepa.The woonda bolodi dera ndi, mapindikidwe bolodi ndi zambiri chifukwa cha kutentha pa reflow kuwotcherera.

4. PCBA bolodi kukula ndi chiwerengero cha matabwa

Pamene bolodi lozungulira liwotchedwa reflow welded, nthawi zambiri limayikidwa mu unyolo kuti lifalitse.Maunyolo kumbali zonse ziwiri amakhala ngati mfundo zothandizira.Ngati kukula kwa bolodi la dera ndi lalikulu kwambiri kapena chiwerengero cha matabwa ndi chachikulu kwambiri, n'zosavuta kuti bolodi la dera ligwedezeke mpaka pakati, zomwe zimapangitsa kuti pakhale kusintha.

5. Kuya kwa V-Cut

V-kudula kudzawononga kamangidwe ka bolodi.V-kudula adzakhala Dulani grooves pa pepala lalikulu choyambirira, ndi kuya mopitirira muyeso wa V-odulidwa mzere zidzatsogolera mapindikidwe a bolodi PCBA.

6. The PCBA bolodi yokutidwa ndi m'dera mkuwa wosafanana

Pa ambiri dera bolodi kamangidwe ali ndi dera lalikulu la zojambulazo mkuwa kwa grounding, nthawi zina Vcc wosanjikiza wapanga malo lalikulu la zojambulazo mkuwa, pamene madera lalikulu la zojambulazo mkuwa sangathe wogawana kufalitsidwa mu matabwa omwewo dera, zidzachititsa kutentha m'lifupi ndi kuzirala liwiro, matabwa dera, kumene, komanso akhoza kutentha bilges ozizira kuotcha, Ngati kukula ndi chidule sizingachitike chifukwa cha mavuto osiyanasiyana ndi mapindikidwe, pa nthawi ino ngati kutentha kwa bolodi wafika malire chapamwamba cha mtengo TG, bolodi lidzayamba kufewetsa, zomwe zimabweretsa kusinthika kosatha.

7. Mfundo kugwirizana zigawo pa bolodi PCBA

Lero dera bolodi ndi Mipikisano wosanjikiza bolodi, pali zambiri kugwirizana pobowola kugwirizana, mfundo kugwirizana awa anawagawa kudzera dzenje, dzenje akhungu, kukwiriridwa dzenje mfundo, mfundo kugwirizana izi kuchepetsa zotsatira za kukulitsa matenthedwe ndi chidule cha bolodi dera. , zomwe zimabweretsa kusinthika kwa bolodi.Pamwambapa ndi zifukwa zazikulu mapindikidwe a bolodi PCBA.Pa processing ndi kupanga PCBA, zifukwa izi zikhoza kupewedwa ndi mapindikidwe a bolodi PCBA akhoza bwino yafupika.