1. Cov khoom npe (tus qauv)
Lus Cim: Rau cov ntsia hlau tsis muaj tus qauv, uas yog cov khoom tsis yog tus qauv, cov duab kos yuav tsum tau muab.
Piv txwv li, DIN912, Suav lub npe: hexagon socket taub hau ntsia hlau, qhov no yog lub npe ntawm cov khoom.
Txawm li cas los xij, txoj kev raug tshaj plaws, lossis xav tau los hais txog tus qauv, vim tias GB70 kuj yog cov khoom npe zoo li no; Tab sis muaj ntau qhov chaw uas ob tus qauv sib txawv ntawm qhov loj.
Cov qauv kev muaj peev xwm tshaj plaws hauv ntiaj teb yog: German tus qauv (DIN), tus qauv thoob ntiaj teb (ISO), Suav teb chaws tus qauv (GB), Asmeskas tus qauv (ANSI), tus qauv Japanese (JIS).
2.Specification
Lub npe ntsia hlau dav dav yog tus hniav qauv lub npe kab * ntsia hlau ntev.
Hniav qauv chaw nyob inch, metric system feem ntau siv: M2, M3, M4, M5, M6, M8, M10, M12;
American system feem ntau siv yog: 4#-40, 6#-32, 8#-32, 10#-24, 1/4-20, 5/{{ 11}}, 3/{13}}, 1/{15}} thiab lwm yam.
Qhov ntev ntawm cov ntsia hlau yog hais txog qhov ntev ntawm cov khoom embedded. Piv txwv li, COUNTERSUNK HEAD SCREWS yog Loaded nyob rau hauv tag nrho cov LENGTH, ib nrab COUNTERSUNK taub hau ntsia hlau yog Loaded nyob rau hauv ib nrab lub taub hau length, thiab Cylindrical lub taub hau ntsia hlau ntev tsis suav nrog lub taub hau loj. Xws li:
Rau cov lus qhia tshwj xeeb, lub npe tag nrho yog qhov zoo tshaj plaws los ntxiv cov hniav nrug. Piv txwv li, M{{0}}.7x8, sab nraud ntawm 4- ntiv tes hniav yog 4mm,0.7 yog hais txog qhov kev ncua deb ntawm ob tus hniav peaks yog 0.7mm , thiab qhov ntev ntawm 8- ntiv tes kos khoom yog 8 hli.
Rau lub hom phiaj ntawm kev yooj yim, peb yuav tawm cov hniav tuab raws li tus qauv cov hniav los ntawm lub neej ntawd, vim lawv yog cov feem ntau; Yog li kuv tsis tas yuav sau nws. Qhov no yog qhov metric system, Asmeskas cov khoom tseem yuav tsum tau kos npe rau qhov kev ncua deb.
Ntawm no peb tsom mus rau qhov tshwj xeeb ntawm American screws, xws li 6#-32*3/8, 6# yog tus hniav txoj kab uas hla, ze rau 3.5mm; 32 yog 32 cov hniav ib nti ntawm cov xov ntev (sib npaug rau qhov sib nrug ntawm cov ntsia hlau metric); 3/8 yog qhov ntev ntawm cov ntsia hlau (ib yam li cov ntsia hlau metric).
Nov yog ob lub qauv uas yuav tsum nco ntsoov: tus hniav txoj kab uas hla A#{{0}}} (Ax0.013 ntxiv rau 0.06) x25.4 (mm), 1 nti =25.4mm.
Qhov twg 2#=2.2mm, 4#=2.9mm, 6#{7}}.5mm, 8#4.2mm, 10#=4.8mm yog los sau cov ntaub ntawv . Tus naj npawb ntawm cov hniav sib raug rau txhua qhov tshwj xeeb ntawm cov ntsia hlau yuav tsum nco ntsoov: 2#-56, 4#-40, 6#-32, 8#-32, 10#{ {24}}, 1/4-20, 5/16-18, 3/8-16, 1/2-13 (American standard hniav).
Nco tseg: American UNC cov hniav yog cov hniav txheem thiab UNF cov hniav yog cov hniav zoo. Peb muab cov hniav tuab rau cov hniav txheem.
3. Khoom siv
Cov khoom siv raws li kev txiav txim siab tshaj plaws: carbon steel, stainless hlau, stainless hlau, tooj liab, txhuas thiab lwm yam.
Cov pa roj carbon steel tau muab faib ua cov pa roj carbon tsawg (xws li C1008 C1010 / C1015 / C1018 / C1022), nruab nrab carbon steel (xws li C1035), siab carbon steel (C1045 / C1050), alloy steel (SCM435/10 b21/40 cr) .
Cov khoom siv dav dav C1008 yog ua los ntawm cov khoom qib zoo tib yam, xws li 4.8 qib screws, cov txiv ntseej qib zoo tib yam; C1015 general sling ntsia hlau; C1018 dav siv lub tshuab ntsia hlau, tau kawg, kuj siv los ua tus kheej tapping rau tes; C1022 feem ntau yog siv los ua tus kheej tapping rau tes; C1035 nrog 8.8 screws; C1045/10b21/40cr nrog 10.9 screws; 40Cr / SCM435 nrog 12.9 qib screws.
Stainless hlau SS302 / SS304 / SS316 yog qhov feem ntau. Ntawm chav kawm, tam sim no kuj nrov ib tug loj tus naj npawb ntawm SS201 khoom, txawm qis nickel cov ntsiab lus ntawm cov khoom, peb hu tsis tseeb stainless hlau cov khoom; Cov tsos zoo li zoo li cov hlau tsis muaj steel, tab sis kev ua haujlwm tiv thaiv corrosion yog qhov sib txawv ntau.
4. Qib muaj zog
Qib zog yog hais txog cov pa roj carbon steel fasteners.
Cov qib siab ntawm carbon steel screws yog: 4.8, 5.8, 6.8, 8.8, 10.9, 12.9. Cov txiv ntoo sib xws yog: 4, 6, 8, 10, 12.
Feem ntau, cov ntsia hlau hauv qab qib 8.8 yog hu ua cov ntsia hlau zoo tib yam, thiab cov ntsia hlau saum qib 8.8 (xws li qib 8.8) yog cov ntsia hlau muaj zog. Qhov txawv yog tias cov ntsia hlau muaj zog siab yuav tsum tau ua kom muaj kev kho cua sov.
5. Kev kho deg
Kev kho deg yog tsuas yog ua kom cov kev ua haujlwm ntawm kev tiv thaiv corrosion, tab sis kuj yog ib feem ntawm cov xim, yog li nws yog tsuas yog rau cov khoom siv carbon steel, feem ntau yuav tsum tau mus los ntawm kev kho deg.
Kev kho saum npoo yog: dub, galvanized, tooj liab, npib tsib xee, chromium, nyiaj, kub, dacro, kub dip zinc, thiab lwm yam .;
Muaj ntau hom galvanized, xiav thiab dawb zinc, xiav zinc, dawb zinc, daj zinc, dub zinc, ntsuab zinc, thiab lwm yam, tab sis kuj muab faib ua ib puag ncig kev tiv thaiv thiab kev tiv thaiv ib puag ncig, txhua hom plating thiab ntau yam txheej thickness , kom tau raws li qhov sib txawv ntsev tsuag tshuaj ntsuam nyhuv.
