PCB Kukwidza Makomba: Kunzwisisa Counterbore uye Countersink

PCBs zvinhu zvemagetsi zvakaomarara zvine maficha akasiyana anopesvedzera chitarisiko chavo chemuviri nekushanda. Nepo zvinhu zvakaita se layer count uye substrate zvinhu zvichiwanzo simbiswa, dhizaini yemaburi maburi yakakosha zvakaenzana. Mamwe maPCB anoda maburi maburi ekunamatira, uye nzira inoshandiswa kuchera maburi aya inogona kukanganisa zvakanyanya kuita kwebhodhi. Nzira mbiri dzekutanga dzekuchera maburi escrew muPCB icounterbore uye countersink, imwe neimwe ichishanda zvakasiyana zvichienderana nerudzi rwesiruu inoshandiswa.

Kunzwisisa Counterbore Holes

Gomba rakapoteredzwa igomba recylindrical rakaboorwa pamusoro pePCB kuti rigadzikane socket cap screw ine musoro wakatenderedzwa. Iri rudzi rwegomba rinopa yakachengeteka kukwana kune screw, kuve nechokwadi kuti inogara yakapfava nepamusoro pebhodhi. Nepo socket cap screws achiwanzo shandiswa ane counterbore maburi, zvakakosha kuti utarise kuti rudzi urwu rwe screw rwakakodzera kune yako chaiyo PCB zvinodiwa.

Panyaya dzesarudzo dzekugadzira dzine chekuita neizvi, Highleap inonyorawo zvinodiwa pakuputira zvinhu pamwe nekuyedzwa kwePCBA , izvo zvinogona kubatsira kudzivirira kuti pasave nezvinyorwa zvisina kujeka mupakeji yemutengo.

Kuongorora Countersink Holes

Kusiyana nemakomba e-counterbore, maburi e countersink ane chimiro checonical. Kuboora maburi aya kunoda kunyatsoita kuti pave necone-shaped recess inobvumira kuti flat head screw igare yakapfava nepamusoro pebhodhi. Iyi dhizaini inovimbisa yakatsetseka bhodhi pamusoro, iyo inonyanya kubatsira kuchengetedza iyo yakazara dhizaini kuvimbika kwePCB.

Musiyano Pakati peCountersink uye Counterbore Holes

Sarudzo pakati pe countersink uye counterbore maburi zvinoenderana nezvinhu zvakasiyana, kusanganisira rudzi rwe screw uye zvinodiwa zvekushandisa. Maburi eku Counterbore ari nyore kudhiriza, sezvo akamira, nepo maburi e countersink achida imwe kona yekamuri ye flathead screw - kazhinji 82-degree, 90-degree, kana 100-degree.

Countersink maburi anopa kuchinjika kwakawanda, anogara akafuratira musoro screws pamwe nehex hole kumusoro kana yechinyakare flat head screwdriver notch. Kana kuchengetedza nzvimbo uye kuchinjika zviri pekutanga, maburi ecountersink anowanzo kufarirwa, sezvo achibvumira kukwenenzverwa kwemasiruu, zvichiita kuti zvive nyore kukwana PCB mumidziyo ine nzvimbo shoma.

Kune rimwe divi, kana kukwirisa kwakachengeteka kwakakosha uye kuchipfuura zvinonetsa kuchengetedza nzvimbo kana kutsvedzerera kwepasi, maburi e counterbore ndiyo sarudzo iri nani. Iko kushandiswa kwema socket screws mumakomba e counterbore kunopa yakachengeteka zvakanyanya kuenderana nePCB.

Kusarudza iyo Right Drill Bit ye ​​Counterbore uye Countersink Holes

Kusarudza iyo yakakodzera dhiri bhiti kwakakosha kuti uwane chaiyo counterbore uye countersink maburi muPCBs. Pamaburi epa counterbore, kushandisa simbi inomhanya-mhanya (HSS) bhiti ine magumo akati sandara kunoita kuti pave negomba rakachena rinoenderana nescrew dimensions. Aya mabheti akagadzirirwa kubata zvinhu zvakaomarara zvinowanzo shandiswa muPCB, senge fiberglass-yakasimbiswa epoxy laminates.

Pamaburi e countersink, chibooreso che countersink ine kona yakakodzera (kazhinji 82 madhigirii, 90 madhigirii, kana 100 madhigirii) yakakosha. Iyo kona inofanirwa kuenderana nekona yemusoro wesiruu kuti ive nechokwadi chekukwana. Kushandisa carbide-tipped countersink bits kunogona kuwedzera kurongeka uye hupenyu hurefu, kunyanya kana uchishanda nezvinhu zvinoputika.

Thermal Management Kufunga nezve Drilled Holes

Pakuboora maburi emadziro emadziro uye maburi emadziro emadziro muPCB, kutonga kwekupisa chinhu chakakosha kufunga nezvacho. Maitiro ekuboora anounza kupisa, izvo zvinogona kukanganisa kusimba kwePCB . Kupisa zvakanyanya kunogona kukonzera kucheka kana kutsemuka, kunyanya mumabhodhi ane mativi akawanda.

Kudzikamisa nyaya dzine chekuita nekupisa, zvakakosha kuti ushandise nzira dzekutonhodza dzakafanira, semhepo kana mvura inotonhorera panguva yekuchera. Pamusoro pezvo, kusarudza mabheti ekuboorera ane machira akaita setitanium nitride (TiN) anogona kuderedza kupokana uye chizvarwa chekupisa. Kuchengeta yakaringana yekudhirowa kumhanya uye chiyero chekudya kunobatsirawo mukuderedza kukuvadzwa kwekupisa, kuve nechokwadi chekusimba uye kushanda kwePCB.

Kufunga Kwekugadzira

Pakuboora makomba ane counterbor, maitiro acho ari nyore, anoda ruzivo rwehukuru hwe screws uye kudzika kwekuboora. Zvinofanirawo kufungwa nezve plating, kunyangwe makomba ane counterbor asingawanzo plated.

Mukupesana, kuchera maburi ecountersink kunoda kuyera kuyerwa kwescrew body nemakona ekamuri zvichienderana nehukuru hwesiruu. Mabatiro ekuisa pasi akakosha zvakare kumakomba e countersink kana plating ichidikanwa.

Kazhinji, kunzwisisa musiyano uripo pakati pemaburi emuchina wekugadzirisa simbi neanoisa simbi kwakakosha kune vagadziri vePCB nevagadziri. Maburi aya anoita basa rakakosha pakuona kuti zvikamu zvinoiswa zvakanaka uye kuti maPCB anosungirirwa zvakasimba. Nekusarudza mhando yegomba rakakodzera zvichienderana nezvinodiwa zvekushandisa, vagadziri vanogona kuvandudza mashandiro uye runako rwezvikamu zvePCB.