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Dacromet coated hexagonal cylindrical lub taub hau ntsia hlau: Ib lub ntsia hlau me me txiav txim siab lub neej ntawm cov khoom siv loj, tiv thaiv corrosion thiab corrosion-resistant, thiab tsis muaj kev phom sij ntawm hydrogen embrittlement.
2026-11-04 IB
1. Taw qhia: Lub Bolt uas tuav cov cav tov ua ke
Taug kev los ntawm txhua lub khw muag khoom, neeg hlau ntawm tes, lossis cua-turbine nacelle thiab koj yuav pom tib lub fastener: lub cylindrical-lub taub hau ntsia hlau nrog hexagonal so, nruj nrog tus yuam sij Allen. Qhov no yog qhov hexagon socket taub hau hau ntsia hlau, standardized raws li DIN 912 thiab ISO 4762. Nws yog lub neej ntawd ntsia liaj qhov rooj rau tuag pwm, tshuab cuab yeej, hydraulic manifolds, thiab precision sib dhos, vim nws concentrates siab clamp load nyob rau hauv ib lub hnab ntawv compact thiab yuav recessed rau hauv lub counterbore.
2. Khoom txhais: Hexagon Socket Head Cap Screw
Lub geometry ntawm lub ntsia liaj qhov rooj no yog optimized rau preload, tsis rau flush tsos:
- Lub taub hau cylindricalnrog lub ntsej muag tiaj tus kabmob uas faib cov khoom siv clamp hla ib puag ncig ncig.
- Sab hauv hexagon socket(metric hla-flats los ntawm 2.5 hli mus rau 36 hli), kis torque los ntawm rau lub ntsej muag nrog tsawg cam-tawm.
- Full-form metric xov(ntxhiab lossis nplua suab rau ISO 261), dov es tsis txiav rau cov nplej tsis tu ncua thiab lub neej qaug zog zoo dua.
- Cov chav kawm 8.8, 10.9, thiab 12.9, npog lub zog tensile ntawm 800 txog 1,220 MPa.
| Xov | Lub taub hau Dia. (dk) | Lub taub hau qhov siab (k) | Hex Qhov (s) | Chav Kawm 8.8 Tensile | Chav Kawm 12.9 Tensile | Ntev Ntev |
| M5 | 8.5mm ib | 5.0mm ib | 4 hli | 800 MPa | 1,220 MPa | 10-60 hli |
| M6 | 10.0 hli | 6.0mm ib | 5 hli | 800 MPa | 1,220 MPa | 12-80 hli |
| M8 | 13.0mm 3 | 8.0mm ib | 6 hli | 800 MPa | 1,220 MPa | 16-100 hli |
| M10 | 16.0mm 3 | 10.0 hli | 8mm ib | 800 MPa | 1,220 MPa | 20-120 hli |
| M12 | 18.0mm 3 | 12.0mm 3 | 10 mm | 800 MPa | 1,220 MPa | 25-150 hli |
| M16 | 24.0mm ib | 16.0mm 3 | 14 hli | 800 MPa | 1,220 MPa | 30-200 hli |
Lub taub hau-rau-xov xov piv tseem ceeb rau kev tsim qauv: lub taub hau loj cylindrical muab cov txheej txheem dav dav, tsis tshua muaj kev ntxhov siab rau daim ntawv cog lus, thaum lub qhov (socket) sib sib zog nqus yog qhov tseem ceeb tshaj plaws ntawm cov ntsia hlau loj tshaj plaws ntawm tag nrho cov ntsia hlau - nws yog qhov chaw xeb ua ntej tawm tsam thiab qhov twg nyias lossis tsis tiav zaj duab xis ua rau lub bolt mus ntes.
3. Kev teeb tsa: Torque, Preload, thiab txheej kev sib tshuam
Ib qho kev tiv thaiv corrosion-resistant bolt tsis muaj nuj nqis yog tias qhov sib koom ua ke loosens. Table 2 muab kev sib dhos torque rau chav kawm 8.8 thiab 10.9 qhov (socket head cap screws) nrog Dacromet txheej (μ ≈ 0.14).
| Xov | Chav Kawm 8.8 Torque | Chav Kawm 8.8 Preload | Chav Kawm 10.9 Torque | Chav Kawm 10.9 Preload |
| M5 | 6,5nm ua | 4,0kn ua | 9,0nm ua | 5,6kn ua |
| M6 | 11.5 Nws | 5,7kn ua | 16.0 Nws | 8.0kn ua |
| M8 | 28.0 Nws | 10.4 kN ib | 39,0nm ua | 14.6 kN ib |
| M10 | 55,0nm ua | 16.5 kN ib | 78.0nm ua | 23.1kn ua |
| M12 | 9 6,0nm | 24.0kn ua | 135 Nm | 33.6kn ua |
| M16 | 240 Nm | 45.0kn ua | 335nm ua | 63.0kn ua |
- Siv tus yuam sij kom raug.Ib qho hnav lossis undersized Allen qhov tseem ceeb ua rau lub qhov (socket) puas thiab nthuav tawm cov hlau tsis muaj steel - qhov tseeb qhov chaw pib corrosion.
- hwm tus counterbore.Lub taub hau zaum ntawm nws lub ntsej muag tag nrho; lub chamfered los yog puas counterbore txo qhov chaw tiv tauj thiab tuaj yeem tawg cov zaj duab xis txheej hauv qab load.
- Tsis txhob sib tov txheej txheejnyob rau tib qho kev sib koom ua ke tsis rov kuaj xyuas torque. Lub Dacromet ntsia hlau rau hauv cov txiv ntoo dawb muaj kev sib txhuam ntau dua li cov ntsia hlau coated rau hauv cov txiv ntoo coated.
- Re-torque tom qab kev sib hais haumnyob rau hauv cov mos mos gaskets los yog yas vaj tse; cov yeeb yaj kiab qhuav tsis nkag, tab sis cov khoom siv clamped tuaj yeem.
4. Xaus
Dacromet-coated hexagon socket lub taub hau hau ntsia hlau yog ib qho me me uas txiav txim siab lub neej kev pab cuam ntawm lub rooj sib txoos loj. Nws lub taub hau cylindrical thiab sab hauv hexagon xa cov clamp thauj khoom niaj hnub xav tau; nws cov zinc-aluminium flake txheej muab cov kev tiv thaiv corrosion uas sab nraum zoov, dej hiav txwv, thiab kev thauj mus los xav tau - tsis muaj hydrogen embrittlement, tsis muaj xov rov tapping, thiab tsis muaj lub siab phem ntawm stainless hlau. Qhia qhov tsim kom raug, torque kom raug, thiab lub bolt yuav outlast cov xim ntawm lub tshuab nws tuav ua ke.
