Wese munhu anoziva nzira yekudzivirira PCB kukotama uye bhodhi warping kubva pakupinda muvira reflow. Inotevera itsananguro yemunhu wese:

1. Deredza simba rekushisa pa Pcb bhodhi kushushikana

Sezvo “tembiricha” ndiyo inonyanya kukonzera kushushikana kwebhodhi, chero bedzi tembiricha yehovhoni inoyerera ichidzikiswa kana mwero wekupisa uye kutonhora kwebhodhi muovheni reflow inononoka, kuitika kwekukotama kweplate uye warpage kunogona kuve kwakanyanya. kuderedzwa. Zvisinei, mamwe migumisiro inogona kuitika, yakadai solder short circuit.

2. Kushandisa high Tg sheet

Tg ndiyo tembiricha yekuchinja kwegirazi, ndiko kuti, tembiricha painochinja zvinhu kubva pagirazi kuenda kune rabha. Iyo yakaderera kukosha kweTg yezvinhu, nekukurumidza bhodhi rinotanga kupfava mushure mekupinda muovheni yekuyerera, uye nguva yainotora kuti ive yakapfava rubber mamiriro Inozoita zvakare kureba, uye deformation yebhodhi ichave yakakomba. . Kushandisa yakakwira Tg ndiro inogona kuwedzera kugona kwayo kutsungirira kushushikana uye deformation, asi mutengo wezvinhu wakakwira.

3. Wedzera kukora kwebhodhi redunhu

Kuti uwane chinangwa chekureruka uye kutetepa kune zvakawanda zvigadzirwa zvemagetsi, ukobvu hwebhodhi hwakasiya 1.0mm, 0.8mm, kana kunyange 0.6mm. Ukobvu hwakadaro hunofanira kuchengetedza bhodhi kubva pakukanganisa mushure memoto wekuyerera, izvo zvakaoma chaizvo. Zvinokurudzirwa kuti kana pasina chinodikanwa chekureruka uye kuonda, ukobvu hwebhodhi hunofanirwa kuve 1.6mm, izvo zvinogona kuderedza zvakanyanya njodzi yekukotama uye deformation yebhodhi.

4. Deredza ukuru hwebhodhi redunhu

Uye kuderedza nhamba yepuzzles

Sezvo mazhinji emafuta ekudzoreredza anoshandisa maketani kutyaira bhodhi redunhu kumberi, iyo yakakura saizi yedare redunhu ichave nekuda kwehuremu hwayo, dent uye deformation muchoto chekuyerera, saka edza kuisa iyo refu divi redunhu bhodhi. somupendero wepuranga. Paketani yevira reflow, kuora mwoyo uye deformation inokonzerwa nekurema kwebhodhi redunhu inogona kuderedzwa. Kuderedzwa kwenhamba yemapanera kunobvawo pachikonzero ichi. Izvi zvinoreva kuti, kana uchipfuura choto, edza kushandisa mupendero wakamanikana kuti upfuure gwara rechoto kusvika pazvinobvira. Kuwanda kwekuora mwoyo deformation.

5. Yakashandiswa tireyi yevira remoto

Kana nzira dziri pamusoro dzakaoma kuwana, yekupedzisira ndeye kushandisa reflow carrier / template kuderedza kuwanda kwe deformation. Chikonzero nei reflow carrier / template inogona kuderedza kupeta kweplate ndeyokuti ingave iri kuwedzera kwekushisa kana kutonhora kwechando, tireyi inotarisirwa Unogona kugadzirisa bhodhi redunhu uye kumirira kusvikira tembiricha yebhodhi redunhu yakaderera kupfuura Tg. kukosha uye kutanga kuomesa zvakare, uye iwe unogonawo kuchengetedza ukuru hwebindu.

Kana iyo imwe-layer pallet isingakwanise kuderedza deformation yedare redunhu, chivharo chinofanira kuwedzerwa kuti chisungirire bhodhi redunhu nepamusoro uye pasi pallets. Izvi zvinogona kuderedza zvakanyanya dambudziko rekutenderera bhodhi deformation kuburikidza nereflow furnace. Nekudaro, iyi tireyi yeovheni inodhura zvakanyanya, uye inofanirwa kuiswa nemaoko uye kudzokororwa.

6. Shandisa Router panzvimbo yeV-Cheka kushandisa sub-board

Sezvo V-Cut ichaparadza simba rekugadzirisa kwepaneti pakati pemapuranga edunhu, edza kusashandisa V-Cut sub-board kana kuderedza kudzika kweV-Cut.