Kodi Mungasankhe Bwanji Chida Chobowolera Chokhala ndi Mpweya Wamphamvu Kwambiri?

Mu mapulojekiti obowola pansi pa dzenje lokhala ndi mphamvu zambiri, kuti mukwaniritse cholinga chobowola bwino komanso mwachangu, ndikofunikira kusankha ma drill bits apamwamba komanso ogwira mtima, kutanthauza kuti, kusankha ma drill bits okhala ndi mapangidwe osiyanasiyana malinga ndi njira zosiyanasiyana zobowola ndi mitundu ya miyala. Zinthu zingapo monga kapangidwe ka nkhope ya drill bit, mawonekedwe a groove yotulutsa ufa, mawonekedwe ndi kukula kwa dzino la carbide, kuuma kwa thupi la drill bit, ndi zina zotero zimakhudza mwachindunji kuchuluka kwa drill bit, ubwino wa drill, blasthole straightness, moyo wa drill bit ndi magwiridwe antchito. Chifukwa chake, kusankha drill bit yoyenera ndikofunikira kwambiri pamapulojekiti obowola miyala.

Ponena za ma drill bits omwe ali ndi mphamvu yotsika pansi pa dzenje (ma drill bits), pali mitundu inayi yayikulu ya mapangidwe a nkhope yomwe ikugwiritsidwa ntchito pano, yomwe ndi: mtundu wa nkhope yokhotakhota, mtundu wa nkhope yokhotakhota, mtundu wa nkhope yokhotakhota ndi mtundu wa pakati pa nkhope yokhotakhota. Carbide nthawi zambiri imagwiritsa ntchito mano a mpira, mano a masika kapena mano a mpira ndi mano a masika pokonza mano.

1. Mtundu wa nkhope yozungulira: Chobowola champhamvu cha mtundu wa nkhope yozungulira chomwe chimathiridwa pansi ndi dzenje (chobowola) chimatha kusunga liwiro lalikulu la kubowola miyala pobowola miyala yolimba yapakatikati komanso yolimba, koma kulunjika kwa kubowola ndi kochepa, ndipo sikoyenera ntchito zobowola miyala zomwe zimafunikira kwambiri kuti ziwongolere dzenje.

2. Mtundu wa nkhope yosalala: Chobowola cha mtundu wa flat end-the-hole drill bit (chobowola cha drill bit) cholimba komanso cholimba, ndipo ndi choyenera kubowola miyala yolimba komanso yolimba kwambiri. Chimathandizanso kubowola miyala yolimba yapakatikati ndi miyala yofewa yokhala ndi zofunikira zochepa kuti ming'alu ikhale yowongoka.

3. Mtundu wa nkhope ya concave: Chobowola cha concave chokhala ndi mphamvu yotsika pansi pa dzenje (chobowola) chili ndi gawo lozungulira la conical pamwamba pake, zomwe zimapangitsa kuti chobowola chikhale ndi mphamvu pang'ono panthawi yobowola miyala, chimasunga magwiridwe antchito a chobowola pakati, ndipo dzenje lobowola lili ndi kulunjika bwino. Kuphatikiza apo, chobowola ichi chili ndi mphamvu yabwino yochotsa fumbi komanso liwiro lobowola mwachangu. Ndi chobowola cha down-the-hole chomwe chikugwiritsidwa ntchito kwambiri pamsika.

4. Mtundu wa pakati pa nkhope yozama yopingasa: Chobowola chapakati cha nkhope yozama yopingasa chokhala ndi mphepo yamphamvu (chobowola chaching'ono) chili ndi gawo lapakati lozama lopingasa pakati pa nkhope yomaliza, lomwe limagwiritsidwa ntchito pobowola miyala. Kubowola mabowo akuya kumatha kusunga kulunjika kwa dzenje lophulika, koma mphamvu ya nkhope yake yopingasa ndi yofooka kuposa mitundu ina ya zobowola, kotero ndi yoyenera pobowola miyala yofewa ndi miyala yapakatikati yolimba.