1. PCB saizi
[Kumashure tsananguro] Saizi yePCB inoganhurirwa nekugona kwemagetsi kugadzira mutsara michina. Naizvozvo, iyo yakakodzera PCB saizi inofanirwa kutariswa paunenge uchigadzira chigadzirwa system chirongwa.
(1) Iyo yakakura PCB saizi inogona kuisirwa paSMT midziyo inobva kune yakajairwa saizi yePCB zvinhu, mazhinji acho ari 20 ″ × 24 ″, kureva, 508mm × 610mm (njanji yakafara)
(2) Saizi inokurudzirwa saizi inoenderana nemidziyo yeSMT yekugadzira mutsara, iyo inobatsira mukugadzirwa kwechigadzirwa chimwe nechimwe uye kubvisa bhodhoro remidziyo.
(3) Iyo diki saizi PCB inofanirwa kugadzirwa senge yekumisikidza yekuvandudza kugadzirwa kweiyo yese mutsara wekugadzira.
【Design zvinodiwa】
(1) Kazhinji, saizi yakakura yePCB inofanirwa kuganhurwa mukati meiyo 460mm × 610mm.
(2) Iyo yakakurudzirwa saizi renji ndeye (200 ~ 250) mm × (250 ~ 350) mm, uye chikamu chinofanirwa kunge chiri "2.
(3) Pakukura kwePCB "125mm×125mm, PCB inofanira kugadzirirwa kusvika pakukura kwakakodzera.
2, PCB chimiro
[Tsanangudzo yekumashure] Midziyo yekugadzira yeSMT inoshandisa njanji kuendesa maPCB, uye haigone kutamisa maPCB asina kurongeka, kunyanya maPCB ane maburi mumakona.
【Design zvinodiwa】
(1) Chimiro chePCB chinofanira kunge chiri chikwere chenguva dzose chine makona akatenderedzwa.
(2) Kuti ive nechokwadi chekugadzikana kwemaitiro ekutapurirana, chimiro chisina kujairika chePCB chinofanirwa kutariswa sechinoshandurwa kuita mativi akaenzana nenzira yekumisikidza, kunyanya mapeji emakona anofanirwa kuzadzwa kuitira kudzivirira nzira yekutapurirana. wave soldering shaya Kadhi bhodhi.
(3) Pamabhodhi eSMT akachena, mapundu anotenderwa, asi saizi yepakati inofanira kunge iri pasi pechikamu chimwe chete muzvitatu cheurefu hwedivi raanowanikwa. Kana ichipfuura chinodiwa ichi, rutivi rwekugadzira nzira inofanira kuzadzwa.
(4) Pamusoro pedhizaini inoyevedza yerutivi rwekupinza, dhizaini yemunwe wegoridhe inofanirwa kugadzirwawo ne (1~1.5) × 45 ° chamfering pamativi ese ebhodhi kuti ifambise kuisa.
3. Divi rekutumira
[Tsanangudzo yekumashure] Saizi yedivi rekufambisa zvinoenderana nezvinodiwa zvegwara rekufambisa remidziyo. Michina yekudhinda, michina yekuisa uye reflow solder vira kazhinji zvinoda kuti rutivi rwekufambisira rwuve pamusoro pe3.5mm.
【Design zvinodiwa】
(1) Kuti uderedze deformation yePCB panguva yekutengesa, iyo yakareba yedivi nzira yePCB isina kuisirwa inowanzoshandiswa senzira yekufambisa; nokuda kwekuisa PCB, iyo yakareba yedivi nzira inofanirawo kushandiswa senzira yekufambisa.
(2) Kazhinji, mativi maviri ePCB kana kuisirwa nzira yekufambisa anoshandiswa sedivi rekutapurirana. Hupamhi hudiki hwedivi rekutapurirana i5.0mm. Panofanira kunge pasina zvikamu kana majoini ekutengesa kumberi nekumashure kwedivi rekutapurirana.
(3) Siri-kutapurirana divi, hapana chinorambidzwa pamidziyo yeSMT, zviri nani kuchengetedza 2.5mm chikamu chinorambidzwa nzvimbo.
4, gomba rekuisa
[Kumashure Tsanangudzo] Mazhinji maitiro akadai sekumisikidza kugadzirisa, kuungana, uye kuyedzwa kunoda chaiyo chinzvimbo chePCB. Naizvozvo, zvinowanzodiwa kugadzira makomba ekumisikidza.
【Design zvinodiwa】
(1) PaPCB yega yega, maburi maviri ekumisikidza anofanirwa kugadzirwa, imwe idenderedzwa uye imwe yacho yakareba groove chimiro, yekutanga inoshandiswa pakuisa uye yekupedzisira inoshandiswa kutungamira.
Iko hakuna chakakosha chinodiwa kune yekumisikidza aperture, inogona kugadzirwa zvinoenderana neyakaomeswa fekitori yako, uye inokurudzirwa dhayamita i2.4mm uye 3.0mm.
Makomba ekumisikidza anofanira kunge asina-metallized maburi. Kana iyo PCB iri punched PCB, gomba rekumisikidza rinofanira kugadzirwa neplate yegomba kusimbisa kusimba.
Kureba kwegomba rekutungamira kazhinji kaviri dhayamita.
Pakati pegomba rekuisa panofanirwa kunge riri kure ne5.0mm kubva kumucheto wekutumira, uye maburi maviri ekumisa anofanira kunge ari kure sezvinobvira. Zvinokurudzirwa kuronga iwo pane yakatarisana kona yePCB.
(2) Kune yakasanganiswa PCB (PCBA ine plug-in yakaiswa, nzvimbo yegomba rekumisikidza inofanira kunge yakafanana, kuitira kuti dhizaini yechishandiso igovane pakati pemberi nekumashure. Semuenzaniso, screw base inogona zvakare. kushandiswa kugadzira tireyi yeplug-in.
5. Chimiro chechiratidzo
[Tsanangudzo yekuseri] Michina yekuisa yemazuva ano, muchina wekuprinda, michina yekuongorora maziso (AOI), solder paste inspection equipment (SPI), nezvimwewo zvese zvinoshandisa optical positioning systems. Naizvozvo, optical chinzvimbo zviratidzo zvinofanirwa kugadzirwa paPCB.
【Design zvinodiwa】
(1) Zviratidzo zvekumisikidza zvakakamurwa kuita zviratidzo zvepasi rose (Global Fiducial) uye zviratidzo zvenzvimbo (Local Fiducial). Iyo yekutanga inoshandiswa pakumisikidzwa kwebhodhi rose, uye iyo yekupedzisira inoshandiswa kumisikidza yekumisikidza mabhodhi madiki kana akatsetseka-pitch zvikamu.
(2) Chiratidzo chekumisikidza chemaziso chinogona kugadzirwa kuita sikweya, denderedzwa rakaita sedhaimani, muchinjikwa, tic-tac-toe, nezvimwewo, uye kureba i2.0mm. Kazhinji, zvinokurudzirwa kugadzira Ø1.0m yakapoteredza mhangura tsanangudzo muenzaniso. Tichifunga nezvekusiyana pakati pemuvara wezvinhu uye zvakatipoteredza, siya nzvimbo isina-soldering 1mm yakakura kudarika chiratidzo chekuisa maziso. Hapana mavara anotenderwa mukati. Zvitatu pabhodhi rimwechete Kuvapo kana kusavapo kwemhangura yemhangura mumucheka wemukati pasi pechiratidzo chimwe nechimwe kunofanira kuenderana.
(3) Pamusoro pePCB pamusoro nezvikamu zveSMD, zvinokurudzirwa kuisa zviratidzo zvitatu zvekuisa maziso pamakona ebhodhi kune matatu-dimensional positioning yePCB (mapoinzi matatu anosarudza ndege, inogona kuona kukora kwemutengesi. paste).
(4) Nekumisikidza, mukuwedzera kune matatu optical chinzvimbo zviratidzo zvebhodhi rese, zviri nani kugadzira maviri kana matatu ekumisikidza optical chinzvimbo zviratidzo pamakona diagonal eimwe neimwe unit board.
(5) Pamidziyo yakaita seQFP ine lead centre chinhambwe ≤0.5mm uye BGA ine pakati chinhambwe ≤0.8mm, zviratidzo zvepanzvimbo zvemaziso zvinofanirwa kuiswa pamakona ane diagonal kuti zvimire zvakanaka.
(6) Kana paine zvinhu zvakasimudzwa pamativi ese, panofanira kuva nezviratidzo zvekumira padivi rega rega.
(7) Kana pasina gomba rekuisa paPCB, pakati pechiratidzo chekutarisa chemaziso chinofanira kunge chiri chinhambwe chinodarika 6.5mm kubva pamupendero wePCB. Kana paine buri rekumisikidza paPCB, pakati pechiratidzo chekumisikidza chemaziso chinofanira kugadzirwa padivi pegomba rekumisikidza pedyo nepakati pePCB.