Iintlobo zephini eziqhelekileyo kwi PCB uyilo

Kuyilo lwePCB olufuna ujongano kunye neendlela zangaphandle, kufuneka uqwalasele izikhonkwane kunye neziseko. Uyilo lwePCB ngokuthe ngqo okanye ngokungathanga ngqo lubandakanya iintlobo ngeentlobo zezikhonkwane.

Emva kokukhangela iikhathalogu ezininzi zabavelisi, uya kufumanisa ukuba iintlobo zezikhonkwane zihlala zohlulwa zibe zezi ndidi zilandelayo:

1. Inaliti yomqolo omnye/ombini

2. Turret slotted pin

3. Izikhonkwane ze-PCB ezithengiswayo

4. Izikhonkwane zokugcina isiphelo

5. Ipini yokugcina i-soldering cup

6. Izikhonkwane zetheminali ezifakiweyo

7. Iphinikhodi yetheminali

Uninzi lwezi zikhonkwane zidibaniswe neziseko zazo kwaye zenziwe ngezinto ezahlukeneyo. Izinto eziqhelekileyo ezisetyenziselwa ukuvelisa ezi zikhonkwane ziyi-beryllium nickel, i-beryllium nickel, i-alloys yobhedu, i-phosphor bronze, kunye ne-copper tellurium. Izikhonkwane zityatyiswe ngezinto ezahlukeneyo zokunyanga umphezulu, ezifana nobhedu, ilothe, itoti, isilivere, igolide kunye nenickel.

Ezinye izikhonkwane ziyathengiswa okanye zenziwe crimped kwiingcingo, kodwa izikhonkwane (ezifana neeplagi, ii-solder mounts, press fits, kunye ne-turret samples) zixhonywe kwi-PCB.

Ulukhetha njani uhlobo lwephini oluchanekileyo loyilo lwePCB?

Ukukhetha izikhonkwane zePCB kufuna iingqwalasela ezimbalwa kakhulu kunezinye iinxalenye ze-elektroniki. Ukongamela iinkcukacha zoomatshini okanye zombane kunokukhokelela kwiingxaki zokusebenza kwiprototype okanye iiPCB zemveliso.

Xa ukhetha izikhonkwane zePCB, kufuneka uqwalasele le miba ilandelayo.

1. Uhlobo

Ngokucacileyo, kufuneka uqonde uhlobo lwe-PCB oluhambelana noyilo lwakho. Ukuba ujonge izikhonkwane zetheminali zoqhagamshelo lwebhodi ukuya kwibhodi, iiheader zilukhetho oluchanekileyo. Iintloko zePin zihlala zifakwe kwimingxuma, kodwa kukho iinguqulelo ezifakwe phezulu, ezifanelekileyo kakhulu ukuhlanganisana okuzenzekelayo.

Kwiminyaka yakutshanje, itekhnoloji ye-solderless ibonelele ngeendlela ezininzi zokukhetha izikhonkwane zePCB. Izikhonkwane ze-Press fit fit zilungele ukuphelisa i-welding. Ziyilelwe ukuba zilingane imingxunya ye-PCB ekhutshiweyo kwaye zibonelele ngokuqhubekayo ngoomatshini kunye nombane. Iiheader zesikhonkwane ezinomqolo omnye zisetyenziselwa ibhodi ukuya ebhodini kunye nocingo ukuya ebhodini.

2. I-pitch

Ezinye izikhonkwane zePCB zibonelela ngobungakanani obahlukeneyo benowuthi. Umzekelo, iiheader ze-pin ezinemiqolo emibini zidla ngokuba yi-2.54mm, 2mm kunye ne-1.27mm. Ukongeza kwisayizi ye-pitch, ubungakanani kunye nokulinganiswa kwangoku kwepini nganye kwahlukile.

3

Izinto ezisetyenziselwa ukucwenga izikhonkwane zinokubangela umahluko kwiindleko kunye nokuhamba. Izikhonkwane ezifakwe ngegolide zibiza kakhulu kunezikhonkwane ezifakwe kwi-tin, kodwa ziqhuba ngakumbi.

Uyilo lwePCB oluneentlobo ezahlukeneyo zezikhonkwane

Njengayo nayiphi na enye indibano yePCB, kukho amaqhinga anokukusindisa ekukhathazekeni xa usebenzisa izikhonkwane zesiphelo kunye noyilo lwesinxibelelanisi. Enye yeyona migaqo ibalulekileyo kukuseta ubungakanani bomngxuma wokuzalisa ngokuchanekileyo. Nceda ujonge ubungakanani obuchanekileyo obucetyiswa ngumenzi. Ukuzalisa imingxuma emincinci okanye enkulu kakhulu kunokubangela iingxaki zendibano.

Iimpawu zombane zezikhonkwane ze-terminal nazo zibaluleke kakhulu, ngakumbi xa kukho umsinga omkhulu ohamba ngayo. Kufuneka unikeze inani elaneleyo lezikhonkwane ukuze uqinisekise i-throughput yangoku efunekayo ngaphandle kokubangela iingxaki zobushushu.

Ukukhutshwa koomatshini kunye nokubekwa kubalulekile kwi-PCB yentloko yezikhonkwane zephakheji.

Ukusebenzisa izikhonkwane zeplagi ukudibanisa ibhodi ukuya ebhodini kunokuba nzima. Ukongeza kulungelelwaniso olufanelekileyo, kufuneka kwakhona kuqinisekiswe ukuba akukho nxalenye yeprofayile ephezulu efana nezixhobo ze-electrolytic ezivala umsantsa phakathi kweePCB ezimbini. Kukwanjalo nakwizikhonkwane zepakethe ezidlulela ngaphaya komphetho wePCB.

Ukuba usebenzisa umngxuma ophumela ngaphandle okanye izikhonkwane zokuxhoma ngaphezulu, kufuneka uqinisekise ukuba isiqabu sobushushu sisetyenziswa kwipolygon yomhlaba eqhagamshelwe kweso phini. Oku kuqinisekisa ukuba ubushushu obusetyenzisiweyo ngexesha lenkqubo ye-soldering abuyi kutshabalalisa ngokukhawuleza kwaye emva koko kuchaphazele i-solder joints.