Feem ntau, lub taub hau ntsia liaj qhov rooj yog tsim los ntawm txias hau yas ua, piv nrog rau kev txiav, cov hlau fiber ntau (hlau hlau) raws li cov duab ntawm cov khoom yog nruam, tsis txiav nyob rau hauv nruab nrab, uas txhim kho lub zog ntawm cov khoom, tshwj xeeb tshaj yog cov khoom. zoo heev mechanical zog.Cold heading forming txheej txheem suav nrog txiav thiab sib sau, ib zaug - nyem, ob npaug - nyem txias lub taub hau thiab ntau - txoj hauj lwm tsis siv neeg txias taub hau.Lub tshuab txias tsis siv neeg lub taub hau yog siv rau stamping, chim siab, extruding thiab txo txoj kab uas hla hauv ntau txoj kev tuag. .Simplex me ntsis los yog ntau lub chaw nres tsheb tsis siv neeg txias taub hau tshuab siv cov yam ntxwv ntawm cov khoom qub yog ua los ntawm cov khoom loj 5 mus rau 6 meters ntev bar lossis qhov hnyav yog 1900-2000 kg ntawm qhov loj ntawm cov hlau rod steel hlau, kev ua thev naus laus zis yog cov yam ntxwv ntawm lub taub hau txias sib sau tsis yog daim ntawv txiav ua ntej, tab sis siv lub tshuab txias txias tsis siv neeg nws tus kheej los ntawm bar thiab hlau pas nrig steel hlautxiav thiab chim siab rau qhov khoob (yog tias tsim nyog).Ua ntej lub extrusion kab noj hniav, cov dawb paug yuav tsum tau reshaped.Qhov dawb paug yuav tau los ntawm shaping.Cov dawb paug tsis xav tau shaping ua ntej upsetting, txo txoj kab uas hla thiab nias.Tom qab cov dawb paug yog txiav, nws raug xa mus rau qhov chaw ua haujlwm ntxhov siab.Qhov chaw nres tsheb no tuaj yeem txhim kho qhov zoo ntawm qhov khoob, txo qhov kev tsim quab yuam ntawm qhov chaw nres tsheb tom ntej los ntawm 15-17%, thiab ncua lub neej ntawm pwm.Qhov precision tiav los ntawm kev sib sau txias kuj tseem cuam tshuam nrog kev xaiv ntawm txoj kev tsim thiab cov txheej txheem siv.Ntxiv, nws kuj yog nyob ntawm cov yam ntxwv ntawm cov khoom siv, txheej txheem cov yam ntxwv thiab lawv lub xeev, cuab yeej precision, lub neej thiab hnav degree.For siab alloy steel siv nyob rau hauv txias taub hau thiab extrusion, Kev ua hauj lwm nto roughness ntawm hard alloy tuag yuav tsum tsis txhob Ra = 0.2um, thaum ua hauj lwm nto roughness ntawm xws tuag ncav Ra = 0.025-0.050um, nws muaj lub siab tshaj plaws lub neej.
Cov bolt xov feem ntau yog ua tiav los ntawm cov txheej txheem txias, kom cov ntsia hlau dawb paug nyob rau hauv ib txoj kab uas hla yog dov los ntawm cov xov phaj (tuag), thiab cov xov yog tsim los ntawm lub siab ntawm cov xov phaj (tuag). Nws yog dav siv vim cov yas streamline ntawm cov ntsia hlau xov tsis raug txiav tawm, lub zog yog nce, lub precision yog siab thiab zoo yog uniform.In thiaj li yuav tsim cov xov sab nraud txoj kab uas hla ntawm cov khoom kawg, qhov yuav tsum tau txoj kab uas hla ntawm cov xov dawb paug yog txawv, vim hais tias nws yog txwv los ntawm cov xov precision, seb cov khoom txheej thiab lwm yam tseem ceeb.Rolling (dov) nias xov yog ib txoj kev ntawm kev sib sau xov hniav los ntawm yas deformation.Nws yog nrog cov xov nrog tib lub suab thiab conical zoo ntawm dov ( dov hlau phaj) tuag, ib sab rau extrude cylindrical plhaub, lwm sab los ua lub plhaub rotation, qhov kawg dov tuag ntawm lub conical zoo hloov mus rau lub plhaub, kom cov xov forming.Rolling (rub) siab xov processing feem ntau taw tes yog tias tus naj npawb ntawm dov kiv puag ncig yog tsis ntau dhau, yog tias ntau dhau, qhov ua tau zoo yog qhov tsawg, qhov chaw ntawm cov xov hniav yooj yim los tsim kev sib cais los yog tsis sib haum xeeb buckle phenomenon.Ntawm qhov tsis sib xws, yog tias tus naj npawb ntawm cov kiv puag ncig yog dhau lawm. me me, xov txoj kab uas hla yog ib qho yooj yim rau plam lub voj voog, dov siab txawv txav nce nyob rau hauv lub sij hawm thaum ntxov, ua rau shortened tuag lub neej.Cov kev tsis xws luag ntawm dov xov: ib co nto tawg los yog khawb ntawm cov xov; Disorderly buckle; Cov xov yog tawm ntawm roundness .Yog cov teeb meem no tshwm sim hauv cov lej loj, lawv yuav pom nyob rau hauv cov txheej txheem ua haujlwm.Yog tias qee qhov me me ntawm cov teeb meem no tshwm sim, cov txheej txheem ntau lawm yuav tsis pom cov kev tsis zoo no yuav ntws mus rau tus neeg siv, ua rau muaj teeb meem.Yog li ntawd, cov teeb meem tseem ceeb ntawm Cov txheej txheem ua tiav yuav tsum tau sau tseg los tswj cov yam tseem ceeb hauv cov txheej txheem tsim khoom.
Lub zog muaj zog fasteners yuav tsum tempered thiab tempered raws li cov kev xav tau.Lub hom phiaj ntawm kev kho cua sov thiab tempering yog los txhim kho cov cuab yeej cuab tam ntawm fasteners kom tau raws li qhov teev tensile zog tus nqi thiab dabtsi yog khoov lub zog piv. internal zoo ntawm high-strength fasteners, tshwj xeeb tshaj yog nyob rau hauv nws zoo.Yog li ntawd, thiaj li yuav tsim tau cov khoom siv zoo high-strength fasteners, nws yog ib qho tsim nyog yuav tsum muaj cov cuab yeej siv kho cua sov siab heev.Vim muaj peev xwm ntau lawm thiab tus nqi qis ntawm cov bolts muaj zog, nrog rau cov qauv zoo thiab meej ntawm cov ntsia hlau xov, cov khoom siv kho cua sov yuav tsum muaj peev xwm ntau lawm, qib siab ntawm automation thiab zoo zoo ntawm kev kho cua sov.Txij li xyoo 1990, cov kab hluav taws xob txuas ntxiv nrog kev tiv thaiv huab cua tau nyob hauv txoj haujlwm tseem ceeb.Hom kev poob siab-hauv qab thiab net-siv lub qhov cub yog qhov tshwj xeeb tshaj yog haum rau kev kho cua sov thiab tempering ntawm me me thiab nruab nrab-qhov loj me fasteners.Tempering kab dhau li ntawm lub qhov cub kaw qhov kev ua tau zoo, tab sis kuj muaj cov cua sov siab, kub, thiab cov txheej txheem tsis zoo. lub computer tswj, khoom tsis ua hauj lwm tswb thiab tso saib functions.High-strength fasteners yog ua los ntawm kev noj - tu - cua sov - quenching - tu - tempering - coloring mus rau lub offline kab, zoo xyuas kom meej qhov zoo ntawm kev kho cua sov.Lub decarburization ntawm cov ntsia hlau xov yuav ua rau lub fastener mus ncig ua ntej thaum nws ua tsis tau raws li qhov yuav tsum tau ntawm cov neeg kho tshuab kev ua tau zoo, uas yuav ua rau cov ntsia hlau fastener poob efficiency thiab shorten lub neej kev pab cuam.Vim cov raw khoom decarbonization, yog hais tias tus annealing tsis tsim nyog, yuav ua rau cov kev pab cuam lub neej. raw khoom decarbonization txheej deepened.Thaum lub sij hawm quenching thiab tempering kub kho, qee cov oxidizing gases yog usually coj los ntawm sab nraum lub cub tawg.Cov xeb ntawm lub bar steel hlau los yog cov seem ntawm cov hlau xaim tom qab txias txias yuav decompose tom qab cua sov nyob rau hauv lub cub tawg, generating ib co oxidizing gas.Steel hlau nto xeb, piv txwv li, yog nws ua los ntawm hlau carbonate thiab hydroxide, tom qab lub tshav kub yuav tawg mus rau hauv CO ₂ thiab H ₂ O, yog li aggravating lub decarburization.Cov kev tshwm sim qhia tau hais tias lub decarburization degree ntawm nruab nrab carbon alloy steel yog hnyav dua li carbon steel, thiab ceev tshaj decarburization. Qhov kub ntawm 700 thiab 800 degrees Celsius.Vim tias qhov txuas ntawm cov hlau xaim decomposes thiab sib xyaw ua ke rau hauv cov pa roj carbon dioxide thiab dej ntawm qhov ceev ceev raws li qee qhov xwm txheej, yog tias qhov txuas txuas txuas txuas rau hauv qhov cub hluav taws xob tsis tsim nyog, kuj tseem yuav ua rau lub tshuab hluav taws xob tsis zoo. ntsia hlau decarbonization yuam kev.Thaum lub siab-lub zog bolt yog txias taub hau, cov khoom siv raw thiab cov txheej txheem decarburizing tsis tsuas yog tseem muaj, tab sis yog extruded rau saum cov xov,ua rau txo cov khoom siv hluav taws xob (tshwj xeeb tshaj yog lub zog thiab kev puas tsuaj) rau saum npoo ntawm fasteners uas yuav tsum tau hardened. Tsis tas li ntawd, qhov decarburization ntawm steel hlau, nto thiab sab hauv lub koom haum yog sib txawv thiab muaj sib txawv expansion coefficient, quenching tej zaum yuav tsim nto tawg. .Yog li ntawd, los tiv thaiv cov xov nyob rau sab saum toj ntawm lub decarburization nyob rau hauv tshav kub quenching, tab sis kuj rau raw cov ntaub ntawv tau moderately coated carbon decarburization ntawm fasteners, tig qhov kom zoo dua ntawm lub mesh siv rauv cua sov tiv thaiv nyob rau hauv lub hauv paus sib npaug zos rau cov thawj cov ntsiab lus carbon. thiab carbon txheej txheej, twb decarburization fasteners maj mam rov qab mus rau thawj cov ntsiab lus carbon, carbon muaj peev xwm yog teem nyob rau hauv 0.42% 0.48% advisable, nanotubes thiab quenching cua kub kub, tib yam tsis tau nyob rau hauv kub kub, thiaj li tsis txhob co coarse nplej, muaj feem xyuam rau cov neeg kho tshuab. properties.Qhov teeb meem zoo ntawm fasteners hauv quenching thiab quenching txheej txheem aRe: quenching hardness tsis txaus; Tsis sib npaug hardening hardness; quenching deformation overshoot; Quenching cracking.Cov teeb meem no feem ntau muaj feem xyuam rau cov khoom siv raw, quenching cua sov thiab quenching txias.Kev tsim kho kom raug ntawm cov txheej txheem kev kho cua sov thiab cov txheej txheem ntawm cov txheej txheem kev tsim khoom tuaj yeem ua rau kom tsis txhob muaj xwm txheej zoo li no.
Post lub sij hawm: May-31-2019