Classification ntawm Bolts

 

Raws li kev quab yuam-kev coj tus kheej ntawm kev sib txuas, lawv tau muab faib ua cov bolts zoo tib yam thiab reamed. Raws li cov duab ntawm lub taub hau, lawv muab faib ua hexagonal, puag ncig, square, countersunk, thiab lwm yam. Ntawm lawv, lub taub hau hexagonal yog feem ntau siv. Lub taub hau countersunk feem ntau yog siv rau hauv qhov chaw uas yuav tsum tau muaj kev sib txuas.
Lub npe lus Askiv ntawm lub caij bolt yog U-bolt. Nws yog ib feem uas tsis yog tus qauv. Nws yog U-shaped, yog li nws tseem hu ua U-bolt. Muaj cov xov ntawm ob qhov kawg uas tuaj yeem ua ke nrog cov txiv ntoo. Nws yog tsuas yog siv los kho cov khoom siv tubular xws li cov kav dej lossis cov khoom siv xws li lub tsheb nplooj ntoos hlav. Vim txoj kev kho cov khoom zoo li tus neeg caij nees, nws thiaj li hu ua bolt caij. Raws li qhov ntev ntawm cov xov, nws muab faib ua cov xov tag nrho thiab cov xov tsis puv. [2]
Raws li hom xov, nws tau muab faib ua cov xov coarse thiab xov zoo. Hom ntxhib xov tsis qhia nyob rau hauv lub bolt logo. Bolts tau muab faib ua yim qib raws li qib kev ua tau zoo: 3.6, 4.8, 5.6, 6.8, 8.8, 9.8, 10.9, thiab 12.9. Bolts saum qib 8.8 (xws li qib 8.8) yog ua los ntawm cov hlau tsis tshua muaj carbon hlau lossis cov pa nruab nrab carbon steel thiab tau kho cua sov (quenched + tempered), feem ntau hu ua bolts muaj zog, thiab bolts hauv qab qib 8.8 (tsis suav qib 8.8). ) feem ntau hu ua bolts zoo tib yam.
Ordinary bolts tuaj yeem muab faib ua peb qib: A, B, thiab C raws li kev tsim khoom raug. Qib A thiab B yog cov ntsia hlau ua kom zoo, thiab qib C yog cov ntsia hlau ntxhib. Rau kev sib txuas bolts rau cov qauv hlau, 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 cov qib sib txawv, 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 tshuab dhos, nrog rau qhov chaw du thiab qhov ntev. Cov khoom siv ua haujlwm qib yog 8.8, uas yog qhov nyuaj rau kev tsim thiab nruab, thiab tus nqi siab, yog li lawv tsis tshua siv; ② Qib C bolts yog ua los ntawm cov hlau tsis zoo, qhov loj me tsis meej txaus, thiab cov khoom siv qib siab yog 4.6 lossis 4.8. Lub deformation yog loj thaum lub sij hawm sib txuas shear, tab sis nws yog ib qho yooj yim rau nruab thiab muaj nqi ntau lawm. Nws feem ntau yog siv rau tensile kev twb kev txuas los yog ib ntus fixation thaum lub sij hawm installation.