Fatigue Life Enhancement Technology rau Elastic Clips thiab Adaptation mus rau siab -Frequency Vibration Loads
Dab tsi yog cov khoom tseem ceeb muaj pes tsawg leeg optimization ntsuas rau qaug zog lub neej txhim kho ntawm elastic tuav?
Cov khoom tseem ceeb muaj pes tsawg leeg optimization rau qaug zog lub neej li ntawm elastic tuav yog kom meej kho cov ntsiab lus ntawm alloying ntsiab thiab txo qhov feem ntawm impurity ntsiab raws li ib txwm 60Si2MnA caij nplooj ntoos hlav steel, ntsuas lub zog thiab toughness ntawm elastic tuav. Cov ntsiab lus silicon yog qhov zoo-tu los ntawm 2.0%-2.5% mus rau 1.8%-2.2% kom txo qis kev sib cais ntawm silicon, txo qis kev ntxhov siab ntawm cov ciam teb, thiab xyuas kom meej qhov elastic modulus ntawm elastic tuav tib lub sijhawm. Cov ntsiab lus ntawm manganese yog tswj ntawm 0.6% -0.9% los txhim kho lub hardenability ntawm cov hlau, ua kom tag nrho cov kev ua tau zoo ntawm elastic bar uniform, thiab tsis txhob qaug zog tawg los ntawm kev sib txawv hauv zos. Ntxiv 0.05%-0.08% vanadium, uas tsim cov carbonitrides zoo nrog carbon thiab nitrogen, pins grain ciam teb thiab refines nplej, ua rau grain loj ntawm cov hlau mus txog qib 8-9 thiab zoo heev txhim kho cov qaug zog tiv thaiv. nruj me ntsis tswj impurity ntsiab xws li sulfur thiab phosphorus, nrog rau cov ntsiab lus sulfur ≤0.010% thiab phosphorus cov ntsiab lus ≤0.015%, zam qhov tsim ntawm qis-melting eutectics los ntawm impurity ntsiab thiab txo cov nplej ciam zog. Cov khoom siv elastic zoo tshaj plaws muaj lub zog tensile ≥1800MPa, yield zog ≥1600MPa, thiab cuam tshuam toughness ≥50J, tso cov khoom siv hauv paus rau kev txhim kho lub neej qaug zog.
Dab tsi yog lub hauv paus ntsiab lus thiab cov txheej txheem ntawm kev txhaj tshuaj peening rau kev txhim kho lub neej qaug zog ntawm elastic tuav?
Lub hauv paus ntsiab lus tseem ceeb ntawm kev txhaj tshuaj peening rau kev txhim kho lub neej qaug zog ntawm elastic tuav yog tsim ibuniform residual compressive kev nyuaj siab txheejnyob rau saum npoo ntawm elastic tuav, uas offsets tensile kev nyuaj siab generated los ntawm kev co loads thiab inhibits qhov pib thiab propagation ntawm qaug zog tawg. Nyob rau hauv siab - zaus vibration, nto ntawm elastic tuav yog nquag mus tensile kev nyuaj siab. Thaum lub zog tensile ua ntau zaus dhau qhov kev qaug zog ntawm cov khoom siv, kev qaug zog tawg yuav tshwm sim. Lub residual compressive kev ntxhov siab txheej tuaj yeem txo qis tus nqi ntawm qhov tensile kev nyuaj siab thiab ncua kev tawg pib. Cov txheej txheem cov ntsiab lus ntawm kev txhaj tshuaj peening yuav tsum tau tswj cov kev txhaj tshuaj tsis raug, kev txhaj tshuaj peening siv thiab txhaj tshuaj peening lub sijhawm. Cov txhaj tshuaj yog cam khwb cia hlau txhaj tshuaj nrog ib txoj kab uas hla ntawm 0.8-1.0mm thiab hardness ntawm HRC58-62 los xyuas kom meej qhov muaj peev xwm ntawm kev txhaj tshuaj; Kev txhaj tshuaj peening siv yog tswj ntawm 0.20-0.25A, qhov kev siv tsis txaus tsis tuaj yeem tsim cov txheej txheem tuab txaus, thiab kev siv ntau dhau yuav ua rau microcracks ntawm qhov chaw ntawm elastic tuav; Lub sij hawm txhaj tshuaj peening yog 8-10 feeb ib thooj kom paub meej tias txhua qhov chaw ntawm lub elastic bar tuaj yeem ua tib zoo tua-peened yam tsis muaj qhov chaw ploj lawm. Tom qab txhaj koob tshuaj tivthaiv, qhov seem compressive kev nyuaj siab nyob rau saum npoo ntawm elastic bar tuaj yeem ncav cuag 300-400MPa, lub thickness ntawm compressive compressive txheej yog 0.15-0.20mm, thiab lub neej qaug zog tuaj yeem nce ntau dua 2 zaug.
Dab tsi yog cov qauv tsim qauv ntsuas rau cov qauv kev ntxhov siab optimization ntawm elastic tuav?
Cov qauv tsim qauv ntsuas rau cov qauv kev ntxhov siab optimization ntawm elastic tuav yuav tsum tau uaarc hloov optimization, hla -section gradient tsim thiab thaj chaw tiv tauj ncentawm qhov kev ntxhov siab concentration qhov chaw ntawm elastic tuav, txo tus nqi siab tshaj plaws ntawm kev ntxhov siab hauv zos, thiab ua kom cov kev ntxhov siab sib npaug hauv tag nrho elastic bar. Qhov chaw sib txuas ntawm caj npab thiab lub hauv paus ntawm lub elastic bar yog ib txwm muaj kev ntxhov siab hauv cheeb tsam. Hloov txoj cai-lub kaum sab xis hloov ntawm no mus rau qhov kev hloov pauv ntawm arc nrog lub vojvoog curvature ntawm 5-8mm tshem tawm cov kev ntxhov siab ntawm cov ces kaum thiab txo qhov siab tshaj plaws ntawm txoj haujlwm no los ntawm 30%-40%. Lub caj npab ua hauj lwm ntawm elastic bar txais ib tug ntoo khaub lig-section gradient tsim, nrog lub thickness maj mam txo los ntawm 8mm ntawm lub hauv paus mus rau 5mm thaum kawg, tsis txhob muaj kev nyuaj siab concentration tshwm sim los ntawm tam sim ntawd cross-section hloov thiab ua rau cov kev nyuaj siab faib ntawm lub caj npab ua hauj lwm zoo li qub. Ua kom qhov chaw sib cuag ntawm lub elastic bar thiab txoj kev tsheb ciav hlau thiab lub hauv paus, hloov qhov kev sib cuag kawg ntawm lub elastic bar los ntawm qhov chaw sib cuag mus rau qhov chaw sib cuag, qhov chaw sib cuag tau nce ntau dua 50%, txo qhov kev ntxhov siab hauv zos ntawm qhov chaw sib cuag, thiab txo kev sib cuag thaum lub sij hawm vibration. Tsis tas li ntawd, qhov kawg ntawm lub elastic bar yog me ntsis khoov kom lub elastic deformation qhov chaw ntawm elastic bar, tsis txhob muaj kev cuam tshuam nruj thaum lub sij hawm vibration, thiab ntxiv txo kev ntxhov siab hloov.
Dab tsi yog qhov qaug zog tiv thaiv qhov sib txawv ntawm cov khoom siv dag zog thiab cov khoom siv elastic?
Qhov kev qaug zog tsis sib txawv ntawm cov khoom siv dag zog thiab cov khoom siv elastic yog feem ntau cuam tshuam hauv peb yam: qaug zog txwv, qaug zog lub neej thiab tiv thaiv - kev co attenuation. Qhov kev qaug zog ntawm cov khoom siv dag zog ntxiv tau nce mus rau ntau dua 800MPa, thaum cov khoom siv dag zog ib txwm muaj tsuas yog li 500MPa, uas tuaj yeem tiv taus ntau dua qhov nro thiab compression loads thiab tsis yooj yim los ua kom qaug zog tawg. Nyob rau hauv cov nqe lus ntawm lub neej qaug zog, nyob rau hauv lub 1 × 10⁷ siab- zaus vibration load test, lub zog elastic tuav tsis muaj kab nrib pleb thiab tsis muaj yas deformation, thaum cov tsoos elastic bars yuav pom pom tseeb qaug zog tawg tom qab 2 × 10⁶ vibrations, thiab lub neej qaug zog ntawm lub zog elastic tuav yog nce ntau tshaj 4 zaug. Nyob rau hauv cov nqe lus ntawm kev tiv thaiv - kev co attenuation kev ua tau zoo, tom qab 5 × 10⁶ kev co, lub clamping quab yuam attenuation tus nqi ntawm reinforced elastic tuav yog ≤5%, uas muaj peev xwm tuav ib tug ruaj khov clamping nyhuv rau lub sij hawm ntev, thaum lub clamping quab yuam attenuation tus nqi ntawm cov tsoos elastic tuav yog ≥20%, uas yog ib qho yooj yim mus ua rail loosening. Tsis tas li ntawd, qhov qis - qhov kub thiab txias tsis ua hauj lwm ntawm kev siv zog elastic bar kuj zoo heev. Ntawm qhov kub ntawm -40 degree, lub neej qaug zog tseem tuaj yeem tswj tau ntau dua 80% ntawm qhov kub ntawm chav tsev, thaum lub neej qaug zog ntawm cov khoom siv elastic yuav txo qis los ntawm 50% ntawm qhov kub thiab txias.
Dab tsi yog qhov ntawm - qhov chaw teeb tsa thiab kev saib xyuas cov ntsiab lus ntawm elastic tuav nrog txhim kho lub neej qaug zog?
Qhov ntawm -qhov chaw teeb tsa thiab kev saib xyuas ntawm cov hlua elastic nrog txhim kho lub neej qaug zog yuav tsum tau tsom mus rauinstallation positioning thiab tiv thaiv ntolos xyuas kom meej qhov kev ua tau zoo ntawm cov txheej txheem ntxiv thiab cov kev ntxhov siab tsis sib xws ntawm elastic tuav. Ua ntej kev teeb tsa, xyuas lub xeev ntawm lub elastic bar, nws yog nruj me ntsis txwv tsis pub siv elastic bars nrog cov kab nrib pleb, spalling thiab xeb ntawm qhov chaw, thiab ntxuav cov xeb thiab roj stains ntawm qhov chaw sib cuag ntawm lub elastic bar thiab txoj kev tsheb ciav hlau thiab lub hauv paus kom muaj kev sib cuag zoo. Thaum lub sij hawm installation, nws yuav tsum nruj me ntsis raws li txoj hauj lwm tsim, lub hauv paus ntawm elastic bar yuav tsum tau clamped nyob rau hauv lub qhov ntawm lub hauv paus, thiab qhov sib txawv ntawm lub qhov thiab cov hauv paus hniav ntawm elastic bar yog ≤0.3mm kom tsis txhob muaj kev ntxhov siab tsis sib xws los ntawm kev hloov ntawm elastic bar thaum lub sij hawm vibration. Lub caj npab ua haujlwm ntawm elastic bar yuav tsum tau txuas nrog rau sab saum toj ntawm txoj kev tsheb ciav hlau, nrog rau thaj chaw tiv tauj ≥90% txhawm rau tiv thaiv kev ntxhov siab hauv zos los ntawm kev sib cuag. Thaum lub sij hawm installation, nws yog nruj me ntsis txwv tsis pub mus ntaus lub elastic bar nrog ib tug nyuaj cov cuab yeej xws li hammers kom tsis txhob ua puas lub tua peening reinforcement txheej nyob rau saum npoo ntawm elastic bar thiab ua rau lub disappearance ntawm residual compressive kev nyuaj siab. Thaum lub sij hawm txij nkawm, lub voj voog soj ntsuam yog 1 xyoos, tsom rau kev kuaj xyuas seb lub elastic bar puas muaj tawg, deformation, clamping quab yuam attenuation thiab lwm yam teeb meem, thiab hloov lub elastic bar nyob rau hauv lub sij hawm thaum lub deformation ntau tshaj 0.5 hli. Tsis tas li ntawd, siv cov tshuaj tiv thaiv- xeb rau ntawm qhov chaw ntawm elastic bar tsis tu ncua los tiv thaiv xeb los ntawm kev puas tsuaj rau txheej txheej txheej.