Fasteners - Kev Ua Haujlwm Tsis Ua Haujlwm Thiab Qhov Tseem Ceeb Ntawm Bolts Thiab Ceev

Ntau hom ntawmbolts thiab txiv ntseejtuaj yeem siv los ua threaded fasteners, thiab cov threaded fasteners feem ntau muaj qee yam kev tsis ua haujlwm thaum siv, xws li tawg, sib tw, thiab slipping. Raws li kev paub ntawm threaded fasteners - bolts thiab txiv ntseej, Xiaorui yuav qhia rau koj hnub no cov kev ua tsis tau zoo thiab cov yam ntxwv ntawm bolts thiab txiv ntseej.

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Bolt tawg

1. Sib dhos twist thiab kua muag tawg
Cov yam ntxwv ntawm kev sib tw thiab rub pob txha yog pom tseeb caj dab thiab elongation ntawm qhov chaw tawg. Qhov zoo tshaj plaws yog tias qhov sib txhuam coefficient ntawm qhov sib txuas yog me me dhau; Kev siv lub zog ntau dhau thaum lub sijhawm zawm lossis ua ntej nruj, lub tes tsho tsis sib haum nrog cov xov axis thaum lub sijhawm thov torque, thiab kev ceev nrawm heev thaum thov torque; Qhov kev ua tau zoo ntawm cov khoom lawv tus kheej tsis txaus, thiab qhov perpendicularity ntawm fastening nto thiab xov centerline tshaj qhov kam rau ua.
2. Xov yog twisted thiab tawg nyob rau hauv shear quab yuam
Qhov chaw tawg uas yog twisted los ntawm shear quab yuam feem ntau muaj ib tug kauv zoo yam tsis muaj caj dab pom tseeb, ua rau cov xov yuav twisted los ntawm shear quab yuam. Cov yam tseem ceeb muaj xws li cov xov tau daig thaum lub sij hawm nruj, xws li xov deformation, cov hniav tsis sib xws hauv kev sib txuas, thiab vuam slag teeb ntawm cov xov; Qhov chaw uas lubntsia liaj qhov roojyog screwed nyob rau hauv yog thaiv, thiab yog hais tias lub txiv ntoo yog ib tug dig muag qhov, qhov zoo xov qhov tob yog tsis txaus.
3. Kev puas tsuaj ntawm kev ntxhov siab hauv cheeb tsam tom qab siv
Feem ntau tshwm sim ntawm pob txha nyob rau hauv cov cheeb tsam kev ntxhov siab tom qab siv yog nyob rau ntawm lub taub hau ntsia liaj qhov rooj thiab ntawm lub kaum sab xis ntawm lub taub hau thiab lub taub hau.threaded pas nrig.Qhov tseem ceeb tshaj plaws yog lub kaum sab xis ntawm lub taub hau thiab cov pas nrig threaded me me dhau; Muaj qhov tsis xws luag hauv cov yas streamline ntawm lub taub hau thaum lub taub hau txias ntawm bolts. Lub perpendicularity ntawm qhov txuas ntawm qhov chaw thiab lub bolt tshaj qhov kam rau ua.
4. qaug zog tawg
Lub ntsiab tawg thaum lub sij hawm siv bolted kev sib txuas yog qaug zog tawg, uas feem ntau tshwm sim los ntawm tsis txaus preload quab yuam; Ntau dhau attenuation ntawm clamping quab yuam; Unqualified bolt loj thiab kev ua tau zoo; Kev sib koom ua ke ntawm qhov chaw, ib puag ncig kev sib dhos, thiab kev ua haujlwm tsis tuaj yeem ua tau raws li cov qauv tsim.
5. ncua kev puas tsuaj
Qhov zoo tshaj plaws rau kev ncua kev puas tsuaj yog hydrogen embrittlement, uas yog cov kab ntawm hydrogen uas nkag mus rau sab hauv ntawm cov hlau thaum lub sij hawm tsim khoom xws li electroplating thiab vuam. Nyob rau hauv seem los yog sab nraud kev nyuaj siab, cov khoom yuav nkig los yog txawm tawg. Cov fasteners uas nquag ua rau hydrogen embrittlement muaj xws li tus kheej tapping screws, elastic washers, thiab bolts nrog electroplated nto saum qib.
6. Cheebtsam torque tswb
Lub tswb torque ntawm cov khoom feem ntau tshwm sim thaum lub sij hawm bolt sib dhos txheej txheem tswj los ntawm lub kaum sab xis txoj kev. Lub ntsiab yam tseem ceeb yog: yog vim li cas yog hais tias lub sib dhos torque tswj ntau yam ntawm cov khoom yog tsis tsim nyog, manifested raws li qhov teeb meem ntawm kev tswj ntau me me, thiab kev tswj ntau yam hloov upwards los yog downwards.
Ua tsis tau ua ntej nruj rau lub kaum sab xis preset, torque ncav cuag lub tswb txwv sab sauv: yam muaj xws li kev sib txhuam coefficient ntawm cov khoom lawv tus kheej tshaj qhov txwv sab saud, qhov sib txhuam coefficient ntawm cov khoom haum tshaj qhov txwv sab sauv, thiab cuam tshuam ntawm qhov chaw, ua rau muaj kev sib txhuam ntawm cov khoom siv. nce nyob rau hauv sib dhos torque.
Kev sib dhos ib txwm, torque qis txwv lub tswb: Qhov zoo tshaj plaws yog qhov kev sib txhuam coefficient ntawm nws tus kheej tshaj qhov qis qis lossis kev sib txhuam coefficient ntawm qhov haum tshaj qhov qis dua. Thaum ib feem yog screwed nyob rau hauv, lub haum torque yog ntau tshaj qhov pib torque (uas yog, lub torque noj yog siab dhau lawm), uas yog feem ntau pom nyob rau hauv lub nruj ntawmxauv txiv ntseej.
7. Xov slippage
Threaded kev sib txuas feem ntau ntsib xov slippage, feem ntau yog vim xov decarburization. Qhov tshwm sim feem ntau yog tias lub torque tsis tuaj yeem siv thaum lub sij hawm sib dhos, thiab tom qab tshem lub ntsia liaj qhov rooj, nws pom tias tag nrho los yog ib feem ntawm cov xov yog hauv av tiaj tus, thiab lub hardness ntawm lub ntsia liaj qhov rooj xov los yog cov txiv ntseej qhov yog tsawg; Qhov loj ntawm cov xov sab hauv thiab sab nraud yog sib npaug, thiab qhov chaw sib cuag ntawm qhov sib txuas sib txuas yog me me. Muaj ob qhov xwm txheej: ib qho yog tias cov xov tooj ntawm cov xov hauv cov mating iav me me, thiab lwm qhov yog tias cov xov tsis sib cuag nrog ib leeg nyob rau hauv txoj kab uas hla (piv txwv li, qhov tseeb ntawm qhov haum yog qhov tsis zoo, thiab qhov tseeb ntawm qhov haum yog qhov tsis zoo. kev sib cuag ntawm lub bolt xov thiab cov txiv ntoo xov tsis txaus).