Ib tug conical qhov uas yog txiav kom tso cai rau lub tiaj taub hau ntsia hlau yuav tsum tau siv yog hu ua ib tug Countersink qhov. Nws tseem hu ua raws li ib tug conical qhov uas yog txiav mus rau hauv ib tug PCB laminate, los yog ib lub qhov tsim los ntawm kev siv ib tug laum. Lub hom phiaj tseem ceeb yog qhia rau lub taub hau ntawm ib tug countersunk ntsia hlau, muaj ib zaug nws yog tso thiab screwed cia nyob rau hauv lub qhov, mus zaum flush nrog tus nplaim lub laminate. Lub khob hliav qab zoo li tus qhov, uas yog txiav mus rau hauv lub PCB laminate, yog ib tug Countersink. Nws yog feem ntau yog siv tso cai rau cov tapered taub hau ntawm ib tug ntsia hlau mus zaum flush nrog rau sab saum toj los yog hauv qab ntawm cov laminate.

Nws yog tsuas yog siv, yog li ntawd lub tiaj taub hau ntsia hlau yuav zaum flush nrog lub chaw muaj ib tug huv zoo thiab installation. Yuav kom paub meej tseeb tsim rau kev tsim, feem ntau manufacturers yuav tsum tau lub ntsiab lus ntawm lub qhov taub. Lawv kuj yuav tsum tau paub yog hais tias tus qhov yog plated los yog tsis. Paub tias lub qhov yog phaj los sis tsis yog ib qho tseem ceeb vim hais tias nyob rau hauv tej lub sijhawm ib tug unplated qhov tej zaum yuav grounded rau lub moj khaum, uas yuav ua rau ib qho teeb meem uas yuav tsum tau plating los kho. Countersinks feem ntau yog muaj ib tug 82 degree los yog ib tug 90 degree angle; Txawm li cas los, lwm cov ces kaum yog tau hais tias cov qhua tuaj noj mov yuav tau muab rau cov PCB fabricator.

Kom meej drilling ntawm Countersink qhov, cov hauv qab no ntaub ntawv uas yuav tsum tau:

▪ Uas sab ntawm lub Rooj Tswjhwm Saib yog lub Countersink qhov yuav tsum tau drilled, nyob rau sab saum toj los yog hauv qab?

▪ Yog cov dab ntxuav tes thiab ncej tau los ntawm plated los yog uas tsis yog-plated?

▪ Taper lub los yog Countersink lub

▪ Countersink txoj kab uas hla

▪ Lub tiav lawm txoj kab uas hla ntawm tus ncej ntawm lub qhov

▪ qhov tob ntawm lub Countersink yog yuav tsum tau drilled

Hauv qab no yog ib qho kev uas muab ib qho piv txwv ntawm ib tug Countersink qhov:

A: Countersink lub, D: Countersink Inch, d: Qhov kab uas hla, H: Qhov tob