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Self Drilling Screws
2026-11-06 IB
1. Vim li cas tus kheej Drilling Screw hloov hlau tsim
Rau cov vov tsev, cov neeg cog lus cladding, HVAC installers, thiab hnub ci vaj huam sib luag mounting crews, no ntsia hlau yog tam sim no lub neej ntawd xaiv rau kho nyias-gauge steel. Thiab vim hais tias tus kheej-drilling ntsia hlau feem ntau pierces liab qab lossis galvanized steel sab nraum zoov, nws anti-corrosion kev ua tau zoo tsuas yog ib qho tseem ceeb raws li nws cov kev ua haujlwm drilling - ib tug ntsia hlau uas xyaum zoo nkauj tab sis xeb nyob rau hauv ob lub caij yuav stains, stains, thiab nws thiaj li poob.
2. Yuav Ua Li Cas Tus Kheej Drilling Ntsia Hlau Ua Haujlwm
Ib tug self-drilling ntsia hlau yog ib tug hardened steel ntsia hlau uas nws lub taub hau yog av rau hauv ib tug me me twist xyaum. Lub luag haujlwm ua haujlwm ntawm lub ntsiab lus yog:
1. Txoj hauj lwm- Cov ntsia hlau yog zaum ntawm daim ntawv saum toj kawg nkaus hauv lub teeb siab thiab ceev.
2. Drill- lub fluted taub txiav ib lub qhov huv si los ntawm cov hlau; cov flutes nqa tawm lub swarf yog li cov chips tsis jam cov xov.
3. Xov-form- Raws li lub laum taw tes tawm ntawm lub hauv paus hlau, qhov txiav txiav nres thiab cov xov txuas, tapping rau hauv lub substrate.
4.Clamp- lub taub hau rub cov panels ua ke; lub sealing tshuab ntxhua khaub ncaws (yog tias haum) compresses los tsim cov huab cua nruj, xeb-resistant seal.
Txoj cai tsim qauv tseem ceeb yog thickness sib phim: Txhua qhov tho qhov loj me muaj qhov muaj peev xwm drilling - Qhov No. 2 taw tes feem ntau ua haujlwm txog 0.6-2.5 hli ntawm tag nrho cov hlau, thaum No. 5 taw tes tuaj yeem laum txog li 12.5 hli. Tsav lub hau ntswj tshaj nws lub peev xwm kub hnyiab, ua hauj lwm-hardens cov hlau, thiab ua ib tug xoob, corrosion-nruab sib koom ua ke.
| Drill point | Tag nrho drilling peev (steel) | Tej daim ntawv thov | Screw txoj kab uas hla |
| Tsis yog 1 | mus txog ~ 0.6 mm | Lub teeb rau daim ntawv | 3.5-4.2 hli (#8-#10) |
| Tsis yog 2 | 0.6-2.5 hli | Ru tsev, cladding, purlins | 4.2–5.5 hli (#8–#12) |
| No. 3 | 1.7-4.5 hli | Cov txheej txheem steel framing | 4.8–6.3 hli (#12–#14) |
| No. 4 | 3.0-6.5 hli | Heavy gauge framing | 5.5–6.3 hli (#12–#14) |
| No. 5 | 6.0-12.5 hli | Thick steel phaj | 6.3 hli (#14) |
3. Qhov Teeb Meem Corrosion - thiab Yuav Ua Li Cas Ntsia Hlau Coatings Tiv Thaiv Xaj
Ib tug self-drilling ntsia hlau yog ib qho uas feem ntau corrosion-exposed fastener ntawm ib lub tsev hnab ntawv. Nws zaum ntawm qhov sib txuas ntawm ob lossis ntau dua cov ntawv galvanized, tiv taus ntau xyoo ntawm UV, los nag, thiab thermal cycling, thiab nws lub taub hau feem ntau sawv zoo siab rau cov txheej txheem txheej. Thaum cov xeb tshwm nyob rau ntawm lub taub hau, cov stains khiav hauv lub vaj huam sib luag, lub tshuab ntxhua khaub ncaws poob qis, thiab qhov sib koom ua ke pib quaj.
lZinc electroplating (dawb / daj / xiav passivated). Economic hauv paus. Ntshiab lossis daj trivalent passivation slows dawb xeb, thiab 5-8 µm ntawm zinc muab roughly 200-400 teev rau dawb xeb nyob rau hauv ib tug nruab nrab ntsev tsuag tshuaj ntsuam (ISO 9227 / ASTM B117). Haum rau interiors thiab sheltered sab nrauv.
lMechanical galvanizing. Zinc hmoov yog txias-welded rau ntawm cov ntsia hlau nto, tsim ib lub thicker, uniformly faib txheej (txog 40-55 µm) tsis muaj hydrogen embrittlement - ib qho tseem ceeb los tiv thaiv corrosion zoo dua electroplating rau hardened screws.
4. Xaus
Tus kheej-drilling ntsia hlau compresses drilling, threading thiab fastening rau hauv ib qho lus tsa suab, thiab ua li ntawd nws tau dhau los ua cov qauv thiab cov dej tsis sib haum uas tuav cov hnab ntawv steel niaj hnub ua ke. Tab sis nws cov txiaj ntsig tiag tiag yog nyob rau hauv kev sib koom ua ke ntawm ob lub zog: lub zog ua kom zoo, ua kom raug qhov tob tob uas ua rau lub qhov huv si, thiab kev ua haujlwm siab tiv thaiv txheej txheej uas ua rau cov ntsia hlau tsis xeb rau lub neej ntawm lub tsev. Xaiv cov ntsia hlau los ntawm kev muaj peev xwm drilling, thiab xaiv cov txheej txheem los ntawm cov ntaub ntawv tshuaj tsuag ntsev - thiab cov ntsia hlau txo qis yuav dhau mus rau lub vaj huam sib luag uas nws tuav.
