Feem ntau, lub taub hau ntsia liaj qhov rooj yog tsim los ntawm txias hau yas ua, piv nrog kev txiav, cov hlau fiber ntau (hlau hlau) raws 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 zoo heev mechanical zog.Cold heading forming txheej txheem muaj xws li txiav thiab sib sau, ib zaug - nyem, ob npaug - nyem txias taub hau thiab multi - txoj hauj lwm tsis siv neeg txias taub hau taub hau, ib tug tsis siv neeg txias taub hau tshuab. nyob rau hauv ob peb txoj kev dies.Simplex me ntsis los yog multi-chaw nres tsheb tsis siv neeg txias taub hau tshuab siv cov yam ntxwv ntawm tus thawj dawb paug yog ua los ntawm cov khoom loj 5 mus rau 6 meters ntev bar los yog hnyav yog 1900-2000 kg ntawm qhov luaj li cas ntawm cov hlau qws steel hlau, cov txheej txheem technology yog cov yam ntxwv ntawm txias heading forming tsis yog cov ntawv txiav hlau dawb nyob rau hauv ua ntej, tab sis USES lub taub hau tsis siv neeg steel bar dawb paug (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 shaping ua ntej upsetting, txo txoj kab uas hla thiab nias.Tom qab cov dawb paug yog txiav, nws yog xa mus rau upsetting chaw ua hauj lwm chaw nres tsheb.Qhov chaw nres tsheb no yuav txhim kho qhov zoo ntawm cov dawb paug, txo lub forming quab yuam ntawm lub tom ntej no qhov chaw nres tsheb ntawm 7% precision ntawm 1 m. Lub taub hau txoj kev kuj tseem muaj feem xyuam rau kev xaiv txoj kev tsim thiab cov txheej txheem siv. Ntxiv rau, nws kuj nyob ntawm cov yam ntxwv ntawm cov khoom siv, cov yam ntxwv ntawm cov txheej txheem thiab lawv lub xeev, cov cuab yeej precision, lub neej thiab hnav degree.Rau siab alloy steel siv nyob rau hauv txias taub hau thiab extrusion, qhov ua hauj lwm nto roughness ntawm hard alloy tuag yuav tsum tsis txhob Ra = 0.2um, thaum ua hauj lwm nto roughness = 0.502.
Lub 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 hais tias cov yas streamline ntawm cov ntsia hlau xov tsis raug txiav tawm, lub zog yog nce, precision yog siab thiab zoo yog uniform. precision, seb cov ntaub ntawv txheej thiab lwm yam.Rolling (rolling) 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 (rolling hlau phaj) tuag, ib sab rau extrude cylindrical plhaub, lwm sab los ua lub plhaub rotation, zaum kawg dov tuag rau lub plhaub ntawm cov xov (roj hlau phaj) tuag, ib sab rau extrude cylindrical plhaub, lwm sab los ua lub plhaub rotation, qhov kawg dov tuag rau lub plhaub ntawm cov xov hlau. Kev ua cov ntsiab lus feem ntau yog tias tus naj npawb ntawm cov kiv puag ncig yog tsis ntau dhau, yog tias ntau dhau, qhov ua tau zoo yog qhov tsawg, qhov saum npoo ntawm cov hniav yooj yim los tsim kev sib cais lossis tsis sib haum xeeb buckle phenomenon.On qhov tsis sib xws, yog tias tus naj npawb ntawm cov kiv puag ncig me me dhau lawm, xov txoj kab uas hla yog ib qho yooj yim kom plam lub voj voog, dov siab txawv txav nyob rau hauv lub sij hawm luv luv ntawm cov xov hlau deg. Cov kab nrib pleb los yog khawb ntawm cov xov; Tsis zoo buckle; Cov xov yog tawm ntawm roundness.Yog tias cov teeb meem no tshwm sim hauv cov lej loj, lawv yuav pom nyob rau hauv cov txheej txheem ua haujlwm.Yog tias muaj pes tsawg tus ntawm cov teeb meem no tshwm sim, cov txheej txheem tsim khoom 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 kev ua haujlwm yuav tsum tau muab sau tseg rau hauv cov txheej txheem tseem ceeb.
Lub zog muaj zog fasteners yuav tsum tau 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 ua tau raws li qhov muaj peev xwm tensile lub zog thiab khoov lub zog piv. Yog li ntawd, txhawm rau tsim cov khoom siv hluav taws xob zoo, nws yog qhov tsim nyog yuav tsum muaj cov cuab yeej siv kho cua sov siab tshaj plaws.Vim muaj peev xwm ntau lawm thiab tus nqi qis ntawm lub zog siab bolts, 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.90s txij li thaum cov kev kho cua sov ntau lawm. txoj hauj lwm tseem ceeb. Hom kev poob siab-hauv qab thiab net-siv rauv 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, qhov kub thiab txias, thiab cov txheej txheem tsis ua haujlwm ntawm lub khoos phis tawj tswj, cov khoom siv tsis ua haujlwm tswb thiab cov khoom ua haujlwm.High-strength fasteners yog ua los ntawm kev ntxuav - tempering - tempering. colouring rau cov kab offline, ua kom zoo ntawm kev kho cua sov.Lub decarburization ntawm cov xov xov yuav ua rau lub fastener mus rau thawj zaug thaum nws tsis ua raws li cov kev xav 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 lub annealing yog tsis tsim nyog. Kev kho cua sov, qee qhov oxidizing gases feem ntau yog coj los ntawm sab nraum lub cub tawg.Cov xeb ntawm cov hlau bar steel hlau los yog cov seem ntawm cov hlau xaim tom qab txias txias yuav decompose tom qab cua sov hauv lub cub tawg, tsim ib co oxidizing gas.Steel hlau nto xeb, piv txwv li, nws yog ua los ntawm hlau carbonate thiab hydroxide, tom qab lub tshav kub yuav tsum tau tawg mus rau hauv lub H₂rav thiab CO ₂. decarburization.Cov txiaj ntsig tau pom tias qhov decarburization degree ntawm nruab nrab carbon alloy steel yog hnyav dua li cov pa roj carbon steel, thiab qhov ceev tshaj plaws decarburization kub yog nyob nruab nrab ntawm 700 thiab 800 degrees Celsius.Vim qhov txuas ntawm cov hlau xaim decomposes thiab sib txuas ua carbon dioxide thiab dej ntawm qhov ceev ceev nyob rau hauv tej yam kev mob, yog hais tias lub nruam mesh siv lub cub tawg tsis tsim nyog, cov roj carbon dioxide yuav ua rau lub cub tawg. Lub zog muaj zog bolt yog txias taub hau, cov khoom siv raw thiab cov txheej txheem annealed decarburizing tsis tsuas yog tshwm sim, tab sis yog extruded rau saum cov xov, uas 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. Cov kab nrib pleb.Yog li ntawd, txhawm rau tiv thaiv cov xov nyob rau sab saum toj ntawm decarburization nyob rau hauv tshav kub quenching, tab sis kuj rau raw cov ntaub ntawv tau me ntsis coated carbon decarburization ntawm fasteners, tig qhov kom zoo dua ntawm lub mesh siv furnace tiv thaiv cua nyob rau hauv lub hauv paus sib npaug zos rau cov thawj carbon cov ntsiab lus thiab carbon txheej, twb decarburization fasteners maj mam rov qab mus rau lub qub carbon ntsiab lus, 0% 0.4 muaj peev xwm. nanotubes thiab quenching cua sov kub, tib yam tsis tuaj yeem nyob rau hauv qhov kub siab, txhawm rau kom tsis txhob coarse nplej, cuam tshuam rau cov khoom siv kho tshuab.Qhov teeb meem tseem ceeb ntawm cov txheej txheem fasteners hauv quenching thiab quenching txheej txheem yog: quenching hardness tsis txaus; Tsis sib npaug hardening hardness; Quenching deformation overshoot; Quenching cracking feem ntau muaj teeb meem rau cov ntaub ntawv raw. cua txias. Kev tsim kom raug ntawm cov txheej txheem kev kho cua sov thiab cov txheej txheem ntawm cov txheej txheem ntau lawm tuaj yeem zam qhov xwm txheej zoo li no.
Post lub sij hawm: May-31-2019