Classification ntawm Bolts

Raws li txoj kev sib tw quab yuam ntawm kev sib txuas, nws tuaj yeem muab faib ua qhov zoo tib yam thiab cov uas muaj qhov hinged. Raws li cov duab ntawm lub taub hau, muaj hexagonal, puag ncig, square, countersunk, thiab lwm yam. Ntawm lawv, lub taub hau hexagonal feem ntau yog siv. Feem ntau, countersunk taub hau yog siv qhov twg yuav tsum tau kev sib txuas.
Lub npe lus Askiv rau lub eeb ntsia liaj qhov rooj yog U-bolt, uas yog ib qho khoom siv tsis yog qauv nrog U-shaped puab thiab tseem hu ua U-bolt. 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 ntawv cov khoom xws li cov phaj springs ntawm lub tsheb. Vim nws cov khoom ruaj khov zoo li tus neeg caij nees, nws yog hu ua eeb ntsia liaj qhov rooj. Muab faib ua ob hom raws li xov ntev: tag nrho xov thiab tsis puv xov.
Raws li xov profile, nws muab faib ua ob hom: ntxhib thiab nplua. Cov ntxhib profile tsis tshwm nyob rau hauv lub bolt marking. 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. Bolts saum qib 8.8 (xws li qib 8.8) yog ua los ntawm cov hlau tsis tshua muaj carbon hlau lossis cov pa roj carbon nruab nrab thiab tau txais kev kho cua sov (quenching + tempering), feem ntau hu ua bolts muaj zog. Bolts qis dua 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 raws li qhov tseeb ntawm kev tsim khoom: A, B, thiab C. Qib A thiab B yog cov ntsia hlau ua kom zoo, thaum qib C yog bolts ntxhib. Rau kev sib txuas bolts siv hauv cov qauv hlau, tshwj tsis yog tias tau teev tseg, lawv feem ntau yog cov ntxhib C-qib bolts. Muaj qhov sib txawv ntawm cov txheej txheem ua rau ntau theem, thiab cov txheej txheem kev sib raug zoo feem ntau yog raws li hauv qab no: ① bolt rods ntawm qib A thiab B bolts yog machined los ntawm lathes, nrog du nto thiab meej qhov ntev. Lawv cov khoom ua tau zoo yog 8.8, thiab kev tsim khoom thiab kev teeb tsa yog qhov nyuaj, kim, thiab tsis tshua siv; ② C-qib bolts yog ua los ntawm unprocessed round steel nrog imprecise qhov ntev, thiab lawv cov khoom ua tau zoo qib yog 4.6 los yog 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.