Bolt Classification

Raws li hom kev ntxhov siab ntawm kev sib txuas, nws tau muab faib ua qhov zoo tib yam thiab hinged qhov. Raws li cov duab ntawm lub taub hau, nws tuaj yeem muab faib ua lub taub hau hexagonal, puag ncig lub taub hau, lub taub hau square, lub taub hau countersunk, thiab lwm yam. Hexagonal taub hau yog feem ntau siv. Feem ntau, countersunk taub hau yog siv qhov twg yuav tsum tau kev sib txuas.
Cov ntsia liaj qhov rooj horseback, tseem hu ua U-bolt, yog ib qho khoom siv tsis zoo nrog U-zoo li tus qauv. Nws muaj cov xov ntawm ob qho kawg uas tuaj yeem ua ke nrog cov txiv ntseej thiab feem ntau yog siv los kho cov khoom siv tubular xws li cov kav dej lossis cov ntaub ntawv xws li cov tsheb thauj khoom. Vim txoj kev kho zoo li tus neeg caij nees, nws thiaj li hu ua horseback bolt. Raws li qhov ntev ntawm cov xov, nws tau muab faib ua ob pawg: tag nrho cov xov thiab cov xov tsis puv.
Raws li cov hniav zoo nkauj ntawm cov xov, nws muab faib ua ob hom: cov hniav ntxhib thiab cov hniav zoo, thiab cov hniav ntxhib tsis pom nyob rau hauv cov cim ntawm cov ntsia liaj qhov rooj. Bolts tau muab faib ua yim qib raws li lawv qhov kev ua tau zoo: 3.6, 4.8, 5.6, 6.8, 8.8, 9.8, 10.9, thiab 12.9. Ntawm lawv, bolts saum qib 8.8 (xws li qib 8.8) yog ua los ntawm cov pa roj carbon tsawg lossis cov pa roj carbon nruab nrab thiab tau txais kev kho cua sov (quenching + tempering), feem ntau hu ua bolts muaj zog, thaum bolts qis dua qib 8.8 (tsis suav nrog. qib 8.8) feem ntau hu ua bolts zoo tib yam.
Ordinary bolts tuaj yeem muab faib ua peb qib raws li lawv qhov raug raug: A, B, thiab C. Qib A thiab B yog cov ntsia hlau ua kom zoo, thaum Qib C yog cov bolts ntxhib. Rau kev sib txuas bolts siv hauv cov qauv steel, tshwj tsis yog tias tau teev tseg, lawv feem ntau yog cov ntxhib qib C bolts. Muaj qhov sib txawv ntawm cov txheej txheem ntawm ntau theem, thiab cov txheej txheem ua tau zoo feem ntau yog raws li hauv qab no: ① bolt rods ntawm qib A thiab B bolts tau ua tiav los ntawm lub tshuab dhos, nrog lub ntsej muag du thiab meej. Lawv cov khoom ua tau zoo yog 8.8, thiab lawv cov khoom tsim thiab kev teeb tsa yog qhov nyuaj thiab kim, uas tsis tshua siv; ② Qib C bolts yog ua los ntawm cov hlau tsis zoo, thiab lawv qhov ntev tsis meej txaus. Lawv cov khoom ua tau zoo yog 4.6 lossis 4.8. Thaum lub sij hawm shear txuas, lub deformation yog loj, tab sis lub installation yog yooj yim thiab cov nqi ntau lawm yog tsawg. Nws feem ntau yog siv rau tensile kev twb kev txuas los yog ib ntus fixation thaum lub sij hawm installation.