Kutheni PCBA Board deform?

Kwinkqubo yereflow ovenkwayeumatshini wokuthambisa wamaza, Ibhodi yePCB iya kukhubazeka ngenxa yefuthe lezinto ezahlukeneyo, okubangela ukuwelda kwePCBA embi.Siya kuhlalutya nje unobangela deformation PCBA ibhodi.

1. Ubushushu bebhodi yePCB edlula eziko

Ibhodi yesekethe nganye iya kuba nexabiso eliphezulu leTG.Xa iqondo lokushisa le-oven reflow liphezulu kakhulu, liphezulu kunexabiso eliphezulu le-TG yebhodi yesiphaluka, ibhodi iya kuthoba kwaye ibangele ukuguqulwa.

2. ibhodi PCB

Ngokuthandwa kobuchwephesha be-lead-free, ukushisa kwesithando somlilo kuphezulu kunelothe, kwaye iimfuno zeplate ziphezulu kwaye ziphezulu.Ixabiso eliphantsi le-TG, kunokwenzeka ukuba ibhodi yesekethe ikhubazeke ngexesha lesithando somlilo, kodwa ixabiso eliphezulu le-TG, ixabiso eliphezulu kakhulu.

3. Ubukhulu bebhodi yePCBA

Ngophuhliso lweemveliso ze-elektroniki ukuya kwicala elincinci kunye nelincinci, ubukhulu bebhodi yesekethe buyancipha.Ibhodi yesekethe encinci kukuba, ukuguqulwa kwebhodi kunokwenzeka ukuba kubangelwa ukushisa okuphezulu ngexesha le-welding ye-reflow.

4. PCBA ibhodi ubukhulu kunye nenani leebhodi

Xa ibhodi yesekethe iphinda idityaniswe, ibekwe ngokubanzi kwikhonkco lokuhambisa.Amatyathanga emacaleni omabini asebenza njengeendawo zokuxhasa.Ukuba ubungakanani bebhodi yesekethe bukhulu kakhulu okanye inani leebhodi likhulu kakhulu, kulula ukuba ibhodi yesekethe igubungele kwindawo ephakathi, kubangele ukuguqulwa.

5. Ubunzulu be-V-Cut

I-V-cut iya kutshabalalisa i-sub-structure yebhodi.I-V-cut iya kuSika i-grooves kwiphepha elikhulu loqobo, kwaye ubunzulu obugqithisileyo be-V-cut line iya kukhokelela kwi-deformation yebhodi ye-PCBA.

6. Ibhodi ye-PCBA igqunywe ngommandla wobhedu ongalinganiyo

Kuyilo lwebhodi yesekethe jikelele inommandla omkhulu wefoyile yobhedu yokumisa, ngamanye amaxesha umaleko weVcc uyile indawo enkulu yefoyile yobhedu, xa ezi ndawo zinkulu zefoyile yobhedu azikwazi ukusasazwa ngokulinganayo kwiibhodi zeesekethe ezifanayo, ziya kubangela ubushushu obungalinganiyo kwaye isantya sokupholisa, iibhodi zesekethe, kunjalo, nako unako ubushushu bilges ebandayo ukushwabana, Ukuba ukwandiswa kunye ukucutheka ayikwazi ngaxeshanye kubangelwa uxinzelelo ezahlukeneyo kunye deformation, ngeli xesha ukuba ubushushu bebhodi ifikelele kumda ophezulu wexabiso TG, ibhodi iya kuqala ukuthamba, okubangela deformation esisigxina.

7. Amanqaku oqhagamshelwano lweeleya kwibhodi yePCBA

Ibhodi yesekethe yanamhlanje ibhodi ye-multi-layer, kukho iindawo ezininzi zokudibanisa ukomba, la manqaku oqhagamshelwano ahlulwe ngomngxuma, umngxuma oyimfama, umngxuma ongcwatyiweyo, ezi ndawo zokudibanisa ziya kunciphisa umphumo wokwandiswa kwe-thermal kunye nokucutha kwebhodi yesekethe. , okubangela ukuguqulwa kwebhodi.Ezi zingasentla zezona zizathu ziphambili deformation PCBA ibhodi.Ngexesha processing kunye nokuveliswa PCBA, ezi zizathu zinokuthintelwa kunye deformation yebhodi PCBA zingancitshiswa ngempumelelo.