PCB indawo umngxuma ikhonkco ebaluleke kakhulu kwinkqubo kuyilo PCB ukumisela indawo ethile PCB ngokusebenzisa umngxuma. The role of the positioning hole is printed circuit board manufacturing processing benchmark. Iindlela zokubeka indawo yokubeka umngxunya ziindidi ngeendidi, ikakhulu ngokweemfuno zokubeka indawo ngokuchanekileyo. Imingxunya yokuma kwiibhodi zesekethe eziprintiweyo ziya kumelwa ziimpawu ezizodwa zemizobo. When the requirements are not high, the larger assembly hole in the printed circuit board can be used instead.

Ukulungiselela ukuququzelela ukubhalwa kwebhodi yesekethe kunye nokugaya ibhodi esisigxina, kunye nokuvavanywa okukuko kwi-intanethi, abavelisi bebhodi yesekethe abaninzi banethemba lokuba abasebenzisi bayile imingxunya emithathu enganyibilikiyo kwi-PCB, imingxunya yokuma ihlala iyilelwe kwimingxunya engeyiyo eyokwakha, ukubhola ubukhulu be-mm okanye mm. I-Smmo ukuba ibhodi iqine, ubuncinci imingxunya emibini yokubeka kufuneka ibekwe, kwaye ibekwe idiagonally. If you make a jigsaw board, you can also think of the jigsaw board as a PCB, the whole jigsaw board as long as there are three positioning holes. Ukuba umsebenzisi akabeki, umenzi webhodi yesekethe uya kongeza ngokuzenzekelayo ngesiseko sokungachaphazeli umgca, okanye asebenzise imingxunya ekhoyo ebhodini njengemingxunya yokuma.

Indawo yendawo yomngxunya

Device hole Interface devices and connectors are mostly plug-in components. Ububanzi bomngxuma wesixhobo sokufakelwa sikhulu kune-pin sangqa se-8 ~ 20mil, kwaye ukungena kwetini kulungile ngexesha lokudibanisa. Kufuneka kuqatshelwe ukuba kukho impazamo ekuvulekeni komzi-mveliso webhodi yesekethe, kwaye impazamo eqikelelweyo yi-± 0.05mm. I-0.05mm luhlobo lokugrumba kwikhefu ngalinye, kunye ne-0.lmm luhlobo lokugrumba kwikhefu ngalinye ukuba ububanzi bungaphezulu kwe-3.20mm. Ke ngoko, xa uyila ubumfama besixhobo, iyunithi kufuneka iguqulwe ibe ziimilimitha, kwaye ukuvula kufuneka kuyilwe njengobuninzi be-0.05. Le mveliso ipleyiti icwangcisa ubungakanani isixhobo ukubhola ngokwe data ukubhola ezinikezelwa ngumsebenzisi. Ubungakanani isixhobo ukubhola idla 0.1 ~ 0.15 inkulu ngaphezu umngxuma ukwakha ezifunwa ngumsebenzisi. Ububanzi kuyilo lwe-mmo kufuneka bube bukhulu kunokuba buncinci, kwaye imfuneko yokunyamezelana nayo kufuneka ibe nkulu kunokuba incinci. Ukuba sisixhobo sokukrala, ukuvula akufuneki kwandiswe, ngokokuyilwa kwedatha, kunye nemiyalelo yokuchaza ukuba yintoni isixhobo esikhubayo, ukuze umenzi webhodi yesekethe azame ukulawula impazamo kwinkqubo yokwenza board, ukunqanda ingxaki ethile engeyomfuneko.

Iindidi zokomba zahlulwe zangumngxunya onesinyithi kunye nemingxunya engagungqiyo. Kukho ubhedu oluthe nkqo eludongeni lomngxunya wesinyithi, onokudlala indima ebonakalayo kwaye umelwe yi-PTH. Akukho bhedu kudonga lomngxuma womngxunya ongagungqiyo, ngoko ke awunakuqhuba umbane. Kuboniswa yi-NPTH. Umahluko phakathi kobubanzi bangaphandle kunye nobubanzi obungaphakathi kumbhobho wesinyithi osinyithi kufuneka ube mkhulu kune-20mil, kungenjalo iringi yokufaka iwelding incinci kakhulu ukuba ingaqwalaselwa kwaye ayilungelanga iwelding. Ukuba iimeko ziyavuma, ukuvula kungayilwa ukuba ibe ngumjikelo wephedi. Ubunzulu bomngxuma obunobubanzi obuyimingxunya yentsimbi yi-6.35mm, kwaye ubukhulu bomngxunya ongaphezulu we-nonmetal hole ngu-6.5mm. Umngxunya wesinyithi akufuneki uyilwe kumgca wentaba. Umphetho womngxunya kufuneka ube ngaphezulu kwe-1mm kude kumgca wentaba. Cobalt hole heavy hole easily damage the drill, so should be avoided as much as possible. Ngaphandle iwelding kwaye akukho umngxuma zombane non-ebuntsimbi, umngxuma kungenziwa ziyilelwe uphawu nonmetallic iwelding ipleyiti umngxunya akuyomfuneko ukuba uyilo, umgca okanye ngefoyile ye yobhedu ubuncinane 1 mmo umngxuma umngxuma umda umda ngokungqinelana imilo zingahlulwa zibe umngxunya setyhula kunye nomngxuma oxande, ukubhola okuqhelekileyo kumngxunya ojikelezayo, umngxunya oxande ulungile ngokwemigaqo emiselweyo ngamaxesha amaninzi okugrumba, yiyo loo nto uxande loyilo lomngxunya ukukhula okungcono kukuphinda kabini ububanzi, Kwaye ububanzi abukho ngaphantsi kwe-0.8mm, kuncinci ngangokunokwenzeka ukuyila imingxunya yoxande.

PCB positioning hole requirements:

Uphuhliso loshishino kuyilo PCB sele aqolileyo, ngoko ke iimfuno PCB imingxuma ukubeka nabo ugqibelele kakhulu. Imingxunya yokuma kufuneka ihlangabezane nezi mfuno zilandelayo.

1. Fakela ubuncinci imingxunya emibini yokubeka kwidayalogu yebhodi.

2.Umngxuma osemgangathweni womngxuma wokubekwa ngu-3.2mm _ + 0.05mm.

3, kwiimveliso ezahlukeneyo zeshishini lokwenyusa lingasebenzisa oku kulandelayo: Kwiibhodi ezahlukeneyo zemveliso enye (njengebhodi ye-DT kunye nebhodi ye-PP yeZXJlO), ukuba i-PCB inemilinganiselo efanayo, imingxunya yokuma kufuneka ifane.

4. Umngxuma wokubekwa ngumngxunya okhanyayo, oko kukuthi, ongagungqiyo ngomngxuma (ngaphandle kwebhodi ye-rf).

5. Ukuba imingxunya ekhoyo esele ikho (ngaphandle kwemingxunya ebambekayo) ifezekisa ezi mfuno zingasentla, akukho mfuneko yokumisela omnye umngxuma wokuma.

Ukucaciswa okuqhelekileyo kunye neemfuno ezichanekileyo zokubeka imingxunya:

1. Uluhlu lwempazamo enobubanzi bomngxuma wokuma ngokubanzi ngaphakathi kwe-0.01mm. Ukuba impazamo inkulu kwigumbi lokuvelisa le-PCB, iya kubangela ukuba unxibelelwano olubi lwenkqubo kunye nolungelelwaniso olungachanekanga lwesinxibelelanisi sojongano kufakelo oluzenzekelayo.

2, ubukhulu beemingxunya zokubekwa kwindawo: zama ukuba ngaphantsi kwe-3mm, ukuze ikholamu yokuma ingakhubazeki, inkulu kakhulu kwaye iphazamise ukusebenza.

3, indawo umngxuma PCB womgama womnatha: ngaphezulu kwe-1MM, ukuze umsebenzi ufakelo akukho lula ukuba isekethe elifutshane, nayo ayiyi kubangela umonakalo kwindlela imveliso.

I-4, uhlobo lokubeka umngxunya: ukubeka umngxunya ngokubanzi sisidingo solawulo lobuchwephesha lobhedu obungenakungena, ukuze ingabinakunxibelelana nesekethe ebhodini kunye nokuchaneka okuphezulu.

5, ukubeka ubeko lwesinyi: kufuneka ubekhona kwi-PCBA kwiikona ezine okanye kwi-diagonal, ukuze wenze indawo yokuma kwenqwelomoya, ukubeka ngokuchanekileyo ukuchaneka, kokukhona kungcono.

6, umgama phakathi kwendawo yokuma kunye nendawo yovavanyo kufuneka ubuncinci ibe yi-2mm, ukunqanda isekethe emfutshane engalunganga kuvavanyo.

7. Umgama phakathi komngxuma wokuma kunye nomphetho weplate ubuncinci yi-2mm, ekungekho lula ukuyichitha ngelixa uqinisekisa ukomelela kwePCBA.