A umngxuma etsobhileyo leyo bahlabeka ukuvumela intloko Screw tyaba ukuze isetyenziswe kuthiwa umngxuma countersink. Kananjalo oku kubizwa ngokuba emngxunyeni etsobhileyo ukuba isikwe ibe laminate PCB, okanye umngxuma wadala ngokusebenzisa kombiwa kuyo. Eyona njongo ephambili ukuvumela yintloko Screw countersunk, yakuba nje ifakiwe kwaye ziqinisiwe phantsi emgodini, ukuba bahlale yokugungxula kunye kumphezulu laminate. I ezimile cone umngxuma, nto leyo uthathe laminate PCB, i countersink. Oku zisetyenziswa ukuze kuvumeleke intloko tapered ngayo Screw ukuhlala egungxula kunye phezulu okanye ezantsi laminate.

Oku kusetyenziswa ikakhulu, ukuze intloko Screw flat sihlale egungxula kunye komhlaba ukuba ujongo kunye nofakelo ahlambuluke. Ukuqinisekisa design ngezohlwayo ngenxa yokuvelisa, abenzi abaninzi kufuna iinkcukacha ubukhulu emngxunyeni. Kufuneka bazi ukuba umngxuma into engathi ngumfanekiswana okanye hayi. Ukwazi ukuba hole kuba epleyitini okanye hayi kubalulekile kuba kwezinye iimeko hole unplated inokunculwa-sikhokelo, leyo kunokubangela ingxaki eyayiza kufuna nesingxobo ukuze alungise. Countersinks ngokuqhelekileyo abanemfundo enomsila 82 okanye imo yekona ekwiqondo eliphezulu 90; Noko ke, ezinye engile zinokwenzeka ukuba kwakuza kufuneka uMthengi ukunika ukuya fabricator PCB.

Kuba ukubhola echanekileyo imingxunya countersink, le ngcaciso ilandelayo efunekayo:

▪ Yeyiphi icala lebhodi lo una countersink kufuneka akunakumbiwa, ngaphezulu okanye ezantsi?

▪ Ngaba esinkini nesibili ukuba ngokusebenzisa ngumfanekiswana okanye non-ngumfanekiswana?

▪ angle Taper okanye engile countersink

▪ Countersink ubukhulu

▪ Ubukhulu bepali ogqityiweyo nomphini emngxunyeni

▪ Ukujula the countersink ukuba azakwembiwa

Ngezantsi kukho umzekeliso ebonelela umzekelo emngxunyeni countersink:

A: angle Countersink, D: Countersink Ububanzi, d: Hole ubukhulu, H: ubunzulu Hole