Hom pin hom nyob rau hauv PCB tsim

Hauv kev tsim PCB uas xav tau kev sib txuas nrog cov txheej txheem sab nraud, koj yuav tsum xav txog cov pins thiab qhov (sockets). PCB tsim ncaj qha lossis tsis ncaj qha cuam tshuam nrog ntau tus pins.

Tom qab tshawb xyuas ntau cov catalogs ntawm cov tuam txhab, koj yuav pom tias hom pins feem ntau muab faib ua pawg hauv qab no:

1. Ib leeg / ob kab kab koob

2. Turret slotted tus pin

3. Soldering PCB pins

4. Winding davhlau ya nyob twg pins

5. Soldering khob davhlau ya nyob twg tus pin

6. Slotted davhlau ya nyob twg pins

7. Terminal pin

Feem ntau ntawm cov pins no tau ua ke nrog lawv lub qhov (sockets) thiab ua los ntawm cov khoom sib txawv. Cov ntaub ntawv siv los tsim cov pins no yog beryllium tooj liab, beryllium nickel, tooj dag alloys, phosphor bronze, thiab tooj liab tellurium. Cov pins yog plated nrog cov khoom siv sib txawv, xws li tooj liab, txhuas, tin, nyiaj, kub thiab npib tsib xee.

Qee tus pins yog soldered los yog crimped rau cov xov hlau, tab sis cov pins (xws li plugs, solder mounts, press fits, thiab turret samples) yog mounted rau ntawm PCB.

Yuav ua li cas xaiv tus pin hom rau PCB tsim?

Xaiv cov PCB pins yuav tsum tau txiav txim siab tsawg dua li lwm cov khoom siv hluav taws xob. Kev saib xyuas cov ntsiab lus ntawm cov khoom siv hluav taws xob lossis hluav taws xob tuaj yeem ua rau muaj teeb meem ua haujlwm hauv cov qauv lossis cov khoom siv PCBs.

Thaum xaiv PCB pins, koj yuav tsum xav txog cov hauv qab no.

1. Hom

Pom tseeb, koj yuav tsum txiav txim siab PCB tus pin hom uas haum rau koj tus qauv tsim. Yog tias koj tab tom nrhiav rau lub davhlau ya nyob twg pins rau board-to-board kev sib txuas, cov headers yog qhov kev xaiv zoo. Pin headers feem ntau yog ntsia los ntawm qhov, tab sis kuj tseem muaj cov qauv saum npoo av, uas tsim nyog rau kev sib dhos tsis siv neeg.

Nyob rau hauv xyoo tas los no, kev siv tshuab tsis siv neeg tau muab ntau txoj kev xaiv rau PCB pins. Xovxwm haum pins yog zoo tagnrho rau tshem tawm vuam. Lawv tau tsim kom haum padded PCB qhov thiab muab kev ruaj ntseg txhua yam thiab hluav taws xob txuas ntxiv. Ib-kab tus pin headers yog siv rau board-to-board thiab xaim-rau-board.

2. Pitch

Qee tus PCB pins muab ntau qhov ntau thiab tsawg ntawm lub suab. Piv txwv li, ob-kab tus pin headers feem ntau yog 2.54mm, 2mm thiab 1.27mm. Ntxiv rau qhov loj me me, qhov loj thiab ntsuas tam sim no ntawm txhua tus pin kuj txawv.

3. Khoom

Cov ntaub ntawv siv los phaj cov pins tuaj yeem ua rau muaj qhov sib txawv ntawm tus nqi thiab conductivity. Kub-plated pins feem ntau kim dua tin-plated pins, tab sis lawv muaj ntau dua conductive.

PCB tsim nrog ntau hom pins

Zoo li lwm yam PCB los ua ke, muaj qee qhov kev ua kom yuam kev uas tuaj yeem cawm koj ntawm kev txhawj xeeb thaum siv cov pins davhlau ya nyob twg thiab cov qauv tsim. Ib txoj cai tseem ceeb tshaj plaws yog los teeb qhov loj ntawm lub qhov filling kom raug. Thov nco ntsoov xa mus rau qhov tseeb me me hneev taw pom zoo los ntawm cov chaw tsim khoom. Kev ntim cov qhov me me lossis loj dhau tuaj yeem ua rau muaj teeb meem sib dhos.

Cov yam ntxwv hluav taws xob ntawm lub davhlau ya nyob twg tus pins kuj tseem ceeb heev, tshwj xeeb tshaj yog thaum muaj qhov loj tam sim no ntws los ntawm nws. Koj yuav tsum faib tus lej pins txaus kom ntseeg tau tias qhov kev xav tau tam sim no tsis muaj teeb meem kub.

Mechanical clearance and placement yog ib qho tseem ceeb rau PCB header pins ntawm pob.

Kev siv cov pins rau kev sib txuas ntawm cov board-to-board tuaj yeem ua kom yuam kev. Ntxiv nrog rau kev ua kom zoo, nws yuav tsum tau ua kom ntseeg tau tias tsis muaj qhov profile siab xws li electrolytic npog thaiv qhov sib txawv ntawm ob lub PCBs. Tib yam muaj tseeb rau pob pins uas txuas dhau ntawm ntug ntawm PCB.

Yog tias koj siv los ntawm lub qhov los yog nto mount pins, koj yuav tsum xyuas kom meej tias thermal nyem yog siv rau hauv av polygon txuas nrog tus pin. Qhov no ua kom ntseeg tau tias cov cua sov siv thaum lub sij hawm soldering yuav tsis sai sai dissipate thiab tom qab ntawd cuam tshuam rau cov pob qij txha.