How kuunganidza pcb?

Iyo gungano kana yekugadzira nzira ye yakadhindwa redunhu bhodhi (PCB) inosanganisira matanho mazhinji. Matanho ese aya anofanirwa kuenda pamwe chete kuti awane yakanaka PCB musangano (PCBA). Kubatana pakati peimwe nhanho neyekupedzisira kwakakosha. Uye zvakare, iyo yekuisa inofanirwa kugamuchira mhinduro kubva pane zvakabuditsa, izvo zvinoita kuti zvive nyore kuteedzera nekugadzirisa chero mhosho padanho rekutanga. Ndeapi matanho anobatanidzwa pcb gungano? Verenga pamusoro kuti uwane.

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Matanho anobatanidzwa pcb gungano maitiro

PCBA uye maitiro ekugadzira anosanganisira matanho mazhinji. Kuti uwane mhando yemhando yepamusoro yechigadzirwa chekupedzisira, ita nhanho dzinotevera:

Nhanho 1: Wedzera pasoda pasita: Uku ndiko kutanga kweyekuita gungano. Padanho rino, peta inowedzerwa kune iyo pad pad chero kupi kunodiwa simbi. Isa pasita padhaya uye unamatire panzvimbo chaiyo nerubatsiro rwepad. Ichi skrini chinoitwa kubva kumafaira ePBB ane maburi.

Nhanho yechipiri: Isa chinhu. Pcb inopfuura nemuchina unoisa zvinhu izvi chaizvo padhidhi. Makakatanwa anopiwa nesoder paste anobata gungano munzvimbo.

Nhanho 3: Reflux vira: Iyi nhanho inoshandiswa kugadzirisa zvachose chinhu kubhodhi. Mushure mekunge izvo zvinhu zvaiswa pabhodhi, iyo PCB inopfuura nepakati peiyo reflux yevira conveyor bhandi. Iyo inodzorwa kupisa kweovheni inonyungudutsa iyo solder yakawedzerwa mune yekutanga nhanho, ichibatanidza zvachose gungano.

Nhanho 4: Wave soldering: Mune ino nhanho, iyo PCB inopfuudzwa kuburikidza nefungu reiyo yakanyunguduka solder. Izvi zvinogadzira kubatana kwemagetsi pakati pesodera, pcb pad uye zvinotungamira.

Nhanho 5: Kuchenesa: Panguva ino, ese mawelding maitiro apedzwa. Munguva yewelding, huwandu hwakawanda hwemvura yakasara inogona kuumbika yakatenderedza mubatanidzwa weiyo. Sezvinoreva zita iri, danho iri rinosanganisira kuchenesa masara emvura. Chenesa mafashama emvura nemvura yakasanganiswa uye solvent. Kuburikidza danho iri, pcb gungano kwapera. Matanho anotevera anoona kuti gungano rapedzwa nenzira kwayo.

Nhanho 6: Bvunzo: Panguva ino, iyo PCB yakaunganidzwa uye kuongorora kunotanga kuyedza chinzvimbo chezvinhu zvacho. Izvi zvinogona kuitwa nenzira mbiri:

L Chinyorwa: Kuongorora uku kunowanzoitwa pazvinhu zvidiki, huwandu hwezvinhu haupfuuri zana.

L otomatiki: Ita cheki iyi kuti utarise kubatana kwakashata, zvinokanganisa zvinhu, zvisizvo zvakasarudzika, nezvimwe.