1. PCB loj
[Cov lus piav qhia hauv qab] Qhov loj ntawm PCB yog txwv los ntawm lub peev xwm ntawm cov khoom siv hluav taws xob ua cov kab ntau lawm. Yog li ntawd, qhov tsim nyog PCB loj yuav tsum tau txiav txim siab thaum tsim cov khoom tsim cov txheej txheem.
(1) Qhov siab tshaj plaws PCB loj uas tuaj yeem ntsia tau rau ntawm SMT cov cuab yeej los ntawm tus qauv loj ntawm cov ntaub ntawv PCB, feem ntau yog 20 "× 24", uas yog, 508mm × 610mm (rail dav)
(2) Qhov loj me uas pom zoo yog qhov loj me uas phim cov khoom siv ntawm SMT cov kab ntau lawm, uas yog qhov tsim nyog rau kev tsim khoom ntawm txhua yam khoom siv thiab tshem tawm cov fwj ntawm cov khoom siv.
(3) Lub PCB me me yuav tsum tau tsim los ua kev tsim kho kom zoo dua qub ntawm tag nrho cov kab ntau lawm.

【Design Requirements】
(1) Feem ntau, qhov siab tshaj plaws ntawm PCB yuav tsum raug txwv nyob rau hauv thaj tsam ntawm 460mm × 610mm.
(2) Qhov loj me uas pom zoo yog (200 ~ 250) hli × (250 ~ 350) hli, thiab qhov sib piv yuav tsum yog "2.
(3) Rau PCB loj "125mm × 125mm, PCB yuav tsum tau teeb tsa rau qhov loj me.

2, PCB puab
[Cov lus piav qhia keeb kwm yav dhau] SMT cov cuab yeej tsim khoom siv cov khoom siv coj los hloov PCBs, thiab tsis tuaj yeem hloov pauv tsis zoo li PCBs, tshwj xeeb tshaj yog PCBs nrog qhov khoob ntawm cov ces kaum.

【Design Requirements】
(1) Cov duab ntawm PCB yuav tsum yog ib lub xwmfab tsis tu ncua nrog cov ces kaum sib npaug.
(2) Txhawm rau kom muaj kev ruaj ntseg ntawm cov txheej txheem sib kis, cov duab tsis tu ncua ntawm PCB yuav tsum raug txiav txim siab hloov mus rau hauv cov xwm txheej square los ntawm kev txiav txim siab, tshwj xeeb tshaj yog lub kaum qhov khoob yuav tsum tau sau kom tsis txhob muaj cov txheej txheem sib kis. yoj soldering puab tsaig Cardboard.
(3) Rau cov ntshiab SMT boards, qhov khoob tau tso cai, tab sis qhov sib txawv me me yuav tsum tsawg dua li ib feem peb ntawm qhov ntev ntawm sab uas nws nyob. Yog tias nws dhau qhov yuav tsum tau ua, sab txheej txheem tsim yuav tsum tau sau.
(4) Ntxiv nrog rau kev tsim chamfering ntawm sab ntxig, lub chamfering tsim ntawm tus ntiv tes kub yuav tsum tau tsim nrog (1 ~ 1.5) × 45 ° chamfering ntawm ob sab ntawm lub rooj tsavxwm los pab txhawb kev nkag.

3. Kev xa tawm sab
[Cov lus piav qhia keeb kwm yav dhau] Qhov luaj li cas ntawm sab conveying yog nyob ntawm qhov yuav tsum tau ntawm cov lus qhia ntawm cov khoom siv. Cov tshuab luam ntawv, cov tshuab tso kawm thiab cov reflow soldering furnaces feem ntau xav tau sab conveying kom siab tshaj 3.5mm.

【Design Requirements】
(1) Yuav kom txo tau qhov deformation ntawm PCB thaum lub sij hawm soldering, qhov ntev sab kev taw qhia ntawm lub PCB uas tsis yog-tso cai feem ntau yog siv raws li cov kev taw qhia kis tau tus mob; rau kev txiav txim PCB, qhov ntev sab kev taw qhia yuav tsum tau siv raws li cov kev taw qhia kis tau tus mob.
(2) Feem ntau, ob sab ntawm PCB los yog imposition kis tau tus mob kev taw qhia yog siv raws li ib tug kis tau tus mob. Qhov tsawg kawg nkaus qhov dav ntawm sab kis yog 5.0mm. Yuav tsum tsis muaj cov khoom sib txuas lossis cov pob qij txha nyob rau pem hauv ntej thiab sab nraub qaum.
(3) Tsis muaj kev sib kis, tsis muaj kev txwv rau cov khoom siv SMT, nws yog qhov zoo dua los khaws 2.5 hli tiv thaiv thaj tsam.

4, positioning qhov
[Cov lus piav qhia hauv qab] Ntau cov txheej txheem xws li kev tsim kho, kev sib dhos, thiab kev sim xav tau qhov tseeb ntawm PCB. Yog li ntawd, nws yog feem ntau yuav tsum tau tsim qhov positioning qhov.

【Design Requirements】
(1) Rau txhua lub PCB, tsawg kawg yog ob qhov chaw yuav tsum tau tsim, ib qho yog ncig thiab lwm qhov yog qhov ntev zawj, qhov qub yog siv rau qhov chaw thiab tom kawg yog siv rau kev taw qhia.
Tsis muaj qhov tshwj xeeb uas yuav tsum tau ua rau qhov chaw aperture, nws tuaj yeem tsim raws li qhov tshwj xeeb ntawm koj lub Hoobkas, thiab qhov pom zoo txoj kab uas hla yog 2.4mm thiab 3.0mm.
Qhov positioning qhov yuav tsum yog non-metallized qhov. Yog hais tias lub PCB yog ib tug punched PCB, qhov positioning qhov yuav tsum tau tsim nrog ib lub qhov phaj kom ntxiv dag zog rau lub rigidity.
Qhov ntev ntawm qhov qhia qhov yog feem ntau 2 npaug ntawm txoj kab uas hla.
Qhov chaw nruab nrab ntawm qhov chaw yuav tsum yog ntau tshaj 5.0mm ntawm qhov sib kis, thiab ob qhov chaw yuav tsum nyob deb li deb tau. Nws raug nquahu kom npaj lawv ntawm lub kaum sab xis ntawm PCB.
(2) Rau kev sib xyaw PCB (PCBA nrog plug-in ntsia, qhov chaw ntawm lub qhov chaw yuav tsum zoo ib yam, yog li kev tsim cov cuab yeej tuaj yeem sib koom ntawm sab xub ntiag thiab sab nraub qaum, piv txwv li, lub hauv paus ntsia hlau kuj tuaj yeem yuav siv tau rau lub tais ntawm lub plug-in.

5. Cov cim qhia
[Cov lus piav qhia keeb kwm yav dhau] Niaj hnub nimno tso tshuab, tshuab luam ntawv, khoom siv kho qhov muag (AOI), cov khoom siv tshuaj ntsuam xyuas cov tshuaj nplaum (SPI), thiab lwm yam. Yog li ntawd, optical positioning cim yuav tsum tau tsim ntawm PCB.

【Design Requirements】
(1) Cov cim qhia tau muab faib ua cov cim qhia thoob ntiaj teb (Global Fiducial) thiab cov cim qhia hauv zos (Local Fiducial). Lub qub yog siv rau qhov chaw ntawm tag nrho lub rooj tsavxwm, thiab lub tom kawg yog siv rau qhov chaw ntawm imposition sub-boards los yog nplua-pitch Cheebtsam.
(2) Lub cim taw qhia qhov muag pom tau tuaj yeem tsim rau hauv ib lub xwmfab, lub voj voog zoo li pob zeb diamond, tus ntoo khaub lig, tic-tac-toe, thiab lwm yam, thiab qhov siab yog 2.0mm. Feem ntau, nws raug pom zoo kom tsim Ø1.0m puag ncig tooj liab txhais qauv. Noj rau hauv tus account qhov sib piv ntawm cov khoom siv xim thiab ib puag ncig, tawm ntawm qhov chaw uas tsis yog soldering 1 hli loj dua lub cim qhov muag pom. Tsis pub cov cim nyob hauv. Peb nyob rau tib lub rooj tsavxwm Lub xub ntiag los yog tsis muaj cov ntawv ci tooj liab nyob rau hauv txheej txheej hauv qab txhua lub cim yuav tsum zoo ib yam.
(3) Ntawm PCB nto nrog SMD Cheebtsam, nws raug nquahu kom tso peb qhov chaw kho qhov muag cim rau ntawm lub kaum sab xis ntawm lub rooj tsavxwm rau qhov chaw peb sab ntawm PCB (peb lub ntsiab lus txiav txim siab lub dav hlau, uas tuaj yeem kuaj xyuas qhov tuab ntawm solder. muab tshuaj txhuam).
(4) Rau kev txiav txim, ntxiv rau peb qhov chaw kho qhov muag cim rau tag nrho lub rooj tsavxwm, nws yog qhov zoo dua los tsim ob lossis peb qhov kev teeb tsa kho qhov muag pom ntawm cov kab pheeb ces kaum ntawm txhua lub rooj tsavxwm.
(5) Rau cov khoom siv xws li QFP nrog cov hlau lead hauv nruab nrab ≤0.5mm thiab BGA nrog qhov nruab nrab nrug ≤0.8mm, cov cim hauv zos kho qhov muag yuav tsum tau teeb tsa ntawm kab pheeb ces kaum kom raug qhov chaw.
(6) Yog tias muaj cov khoom sib txuas ntawm ob sab, yuav tsum muaj cov cim qhia qhov muag pom ntawm txhua sab.
(7) Yog tias tsis muaj qhov chaw tso rau ntawm PCB, qhov chaw nruab nrab ntawm qhov chaw kho qhov muag yuav tsum yog ntau tshaj 6.5 hli ntawm qhov sib kis ntawm PCB. Yog tias muaj qhov chaw tso rau ntawm PCB, qhov chaw nruab nrab ntawm qhov chaw pom qhov cim yuav tsum tau tsim nyob rau sab ntawm qhov chaw nyob ze rau qhov nruab nrab ntawm PCB.