Editor's Note: Kab lus no yog qhov thib ob hauv ob ntu ntawm kev ua lag luam thiab kev tsim cov kab me me ua kua hloov kab rau kev siv siab.Thawj ntu sib tham txog qhov muaj nyob hauv tsev ntawm cov khoom siv rau cov ntawv thov no, uas tsis tshua muaj.Qhov thib ob tham txog ob yam khoom uas tsis yog ib txwm siv hauv kev ua lag luam no.
Ob hom welded hydraulic kav tsim los ntawm Lub Koom Haum ntawm Automotive Engineers - SAE-J525 thiab SAE-J356A - sib koom ib qho chaw, raws li lawv cov lus sau tseg.Pav ca steel strips raug txiav kom dav thiab tsim rau hauv cov raj los ntawm kev sib txuas.Tom qab cov npoo ntawm cov sawb yog polished nrog ib tug finned cuab tam, cov yeeb nkab yog rhuab los ntawm high zaus kuj welding thiab forged ntawm siab yob los tsim ib tug weld.Tom qab vuam, OD burr raug tshem tawm nrog ib tus tuav, uas feem ntau yog ua los ntawm tungsten carbide.Cov cim qhia flash raug tshem tawm lossis hloov kho rau qhov siab tshaj plaws tsim qhov siab siv lub cuab yeej xauv.
Cov lus piav qhia ntawm cov txheej txheem vuam no yog dav dav, thiab muaj ntau qhov sib txawv me me hauv kev tsim khoom tiag tiag (saib daim duab 1).Txawm li cas los xij, lawv muaj ntau yam khoom siv kho tshuab.
Cov yeeb nkab tsis ua haujlwm thiab hom tsis ua haujlwm feem ntau tuaj yeem muab faib ua tensile thiab compressive loads.Nyob rau hauv ntau cov ntaub ntawv, lub tensile kev nyuaj siab yog qis dua lub compressive kev nyuaj siab.Txawm li cas los xij, feem ntau cov ntaub ntawv muaj zog ntau dua hauv compression dua li qhov nro.Qhob yog ib qho piv txwv.Nws yog compressible heev, tab sis tshwj tsis yog tias molded nrog ib lub network sab hauv ntawm reinforcing tuav (rebars), nws yog ib qho yooj yim rau tawg.Vim li no, steel yog tensile kuaj los txiav txim nws qhov kawg tensile zog (UTS).Tag nrho peb qhov ntau thiab tsawg hydraulic hose muaj tib qhov yuav tsum tau ua: 310 MPa (45,000 psi) UTS.
Vim lub peev xwm ntawm cov kav dej siab los tiv thaiv hydraulic siab, ib qho kev sib cais thiab kev ntsuas tsis ua haujlwm, lub npe hu ua qhov kev sim tawg, yuav tsum tau ua.Kev suav tuaj yeem siv los txiav txim siab qhov theoretical qhov kawg tawg siab, suav nrog cov phab ntsa tuab, UTS thiab sab nraud ntawm cov khoom siv.Vim tias J525 tubing thiab J356A tubing tuaj yeem yog tib qhov loj, qhov sib txawv tsuas yog UTS.Muab lub zog tensile ib txwm ntawm 50,000 psi nrog kev kwv yees tawg siab ntawm 0.500 x 0.049 nyob rau hauv. Lub raj yog tib yam rau ob yam khoom: 10,908 psi.
Txawm hais tias qhov kev kwv yees tau zoo ib yam, ib qho sib txawv hauv kev siv tswv yim yog vim qhov tseeb phab ntsa thickness.Ntawm J356A, sab hauv burr yog kho tau rau qhov loj tshaj plaws nyob ntawm cov yeeb nkab txoj kab uas hla raws li tau piav qhia hauv qhov tshwj xeeb.Rau cov khoom lag luam deburred J525, cov txheej txheem deburring feem ntau txhob txwm txo qis sab hauv txoj kab uas hla los ntawm 0.002 ntiv tes, ua rau cov phab ntsa hauv zos thinning hauv thaj tsam weld.Txawm hais tias cov phab ntsa tuab yog ua tiav nrog kev ua haujlwm txias tom qab, qhov seem ntawm kev ntxhov siab thiab kev coj noj coj ua yuav txawv ntawm cov hlau hauv paus, thiab cov phab ntsa tuab yuav yog me ntsis thinner dua li cov yeeb nkab sib piv tau teev tseg hauv J356A.
Nyob ntawm qhov kawg ntawm kev siv cov yeeb nkab, cov burr sab hauv yuav tsum tau muab tshem tawm los yog flattened (los yog flattened) kom tshem tawm txoj kev xau, feem ntau yog ib phab ntsa flared kawg.Thaum J525 feem ntau ntseeg tias muaj tus ID du thiab yog li tsis xau, qhov no yog kev xav tsis raug.J525 tubing tuaj yeem tsim ID streaks vim kev ua haujlwm txias tsis zoo, ua rau muaj kev sib tsoo ntawm qhov sib txuas.
Pib deburring los ntawm kev txiav (los yog scraping) lub weld hlaws tawm ntawm sab hauv txoj kab uas hla.Cov cuab yeej ntxuav yog txuas nrog lub mandrel txhawb nqa los ntawm cov yob hauv cov yeeb nkab, tsuas yog tom qab vuam chaw nres tsheb.Thaum lub cuab yeej ntxuav tau tshem tawm cov hlaws hlaws, cov chais tsis ua haujlwm tau dov dhau qee qhov ntawm cov vuam sib tsoo, ua rau nws mus rau qhov chaw ntawm cov yeeb nkab ID (saib daim duab 2).Qhov no yog ib qho teeb meem rau maj mam machined kav xws li tig los yog honed kav.
Tshem lub flash ntawm lub raj tsis yooj yim.Cov txheej txheem txiav hloov lub glitter rau hauv ib txoj hlua ntev, tangled ntawm ntse hlau.Thaum kev tshem tawm yog qhov yuav tsum tau ua, kev tshem tawm feem ntau yog phau ntawv thiab txheej txheem tsis zoo.Cov ntu ntawm cov phuam qhwv caj dab qee zaum tawm ntawm lub raj tsim cov chaw tsim khoom thiab xa mus rau cov neeg siv khoom.
Rice.1. Cov khoom siv SAE-J525 yog tsim los ntawm cov khoom loj, uas yuav tsum muaj kev nqis peev thiab kev ua haujlwm loj.Cov khoom siv tubular zoo sib xws ua siv SAE-J356A yog ua tiav hauv cov kab hauv kab annealing raj mills, yog li nws muaj txiaj ntsig zoo dua.
Rau cov kav dej me me, xws li cov kav dej tsawg dua 20 hli hauv txoj kab uas hla, ID deburring feem ntau tsis yog qhov tseem ceeb vim tias cov kab no tsis tas yuav tsum tau ua kom tiav ID ntxiv.Qhov tsuas yog caveat yog tias tus neeg siv kawg nkaus xwb yuav tsum xav txog seb qhov kev tswj hwm flash zoo li cas yuav tsim teeb meem.
ID nplaim hluav taws xob tswj kev ua tau zoo pib nrog cov txheej txheem nruj, txiav thiab vuam.Qhov tseeb, cov khoom siv raw ntawm J356A yuav tsum nruj dua J525 vim tias J356A muaj kev txwv ntau dua ntawm cov nplej loj, oxide suav nrog thiab lwm yam kev ua hlau tsis zoo vim cov txheej txheem txias txias.
Thaum kawg, ID vuam feem ntau yuav tsum tau coolant.Feem ntau cov tshuab siv tib lub tshuab ua kom txias raws li lub tshuab cua tshuab, tab sis qhov no tuaj yeem tsim teeb meem.Txawm hais tias raug lim thiab degreased, zeb coolants feem ntau muaj cov khoom hlau loj, ntau yam roj thiab roj, thiab lwm yam khoom paug.Yog li ntawd, lub J525 tubing yuav tsum tau kub caustic ntxuav lub voj voog lossis lwm yam sib npaug sib npaug.
Condensers, automotive systems, thiab lwm cov tshuab zoo sib xws yuav tsum tau ntxuav cov kav dej, thiab kev tu kom tsim nyog tuaj yeem ua tiav ntawm lub zeb.J356A tawm hauv lub Hoobkas nrog lub bore huv si, tswj cov dej noo thiab cov seem tsawg tsawg.Thaum kawg, nws yog ib qho kev xyaum ua kom puv txhua lub raj nrog cov roj inert los tiv thaiv corrosion thiab kaw qhov kawg ua ntej xa khoom.
J525 kav dej yog normalized tom qab vuam thiab ces txias ua hauj lwm (kos).Tom qab ua haujlwm txias, cov yeeb nkab tau rov ua dua kom ua tau raws li txhua yam kev xav tau ntawm cov tshuab.
Lub normalizing, hlau kos duab thiab ob normalizing cov kauj ruam yuav tsum tau thauj cov yeeb nkab mus rau lub cub tawg, mus rau qhov chaw nres tsheb kos duab thiab rov qab mus rau lub cub tawg.Raws li qhov tshwj xeeb ntawm kev ua haujlwm, cov kauj ruam no yuav tsum muaj lwm cov kauj ruam sib cais xws li taw tes (ua ntej pleev xim), etching thiab straightening.Cov kauj ruam no yog kim heev thiab yuav tsum muaj sij hawm, kev ua haujlwm thiab nyiaj txiag.Cov kav dej txias txias yog txuam nrog 20% ​​khib nyiab hauv kev tsim khoom.
J356A yeeb nkab yog normalized ntawm dov zeb tom qab vuam.Cov yeeb nkab tsis kov hauv av thiab taug kev los ntawm kev pib ua cov kauj ruam mus rau cov yeeb nkab tiav hauv ib ntus ntawm cov kauj ruam hauv cov dov zeb.Welded kav xws li J356A muaj 10% khib nyiab hauv ntau lawm.Tag nrho lwm yam yog sib npaug, qhov no txhais tau hais tias J356A teeb yog pheej yig dua los tsim dua J525 teeb.
Txawm hais tias cov khoom ntawm ob yam khoom no zoo sib xws, lawv tsis zoo ib yam los ntawm kev xav ntawm metallurgical.
Cov kav dej txias J525 xav tau ob qho kev kho mob ua ntej: tom qab vuam thiab tom qab kos duab.Qhov kub thiab txias (1650 ° F lossis 900 ° C) ua rau muaj cov oxides saum npoo, uas feem ntau raug tshem tawm nrog cov ntxhia acid (feem ntau sulfuric lossis hydrochloric) tom qab annealing.Pickling muaj qhov cuam tshuam loj rau ib puag ncig ntawm huab cua emissions thiab hlau-nplua nuj cov dej khib nyiab.
Tsis tas li ntawd, qhov normalization ntawm qhov kub thiab txias nyob rau hauv qhov txo qhov cua ntawm cov menyuam hearth rauv ua rau kev noj cov pa roj carbon nyob rau saum npoo ntawm cov hlau.Cov txheej txheem no, decarburization, tawm ntawm txheej txheej uas tsis muaj zog dua li cov khoom qub (saib daim duab 3).Qhov no tseem ceeb tshwj xeeb tshaj yog rau cov kav dej nyias nyias.Ntawm 0.030 "phab ntsa tuab, txawm tias me me 0.003" txheej decarburization yuav txo cov phab ntsa zoo los ntawm 10%.Xws li cov kav dej tsis muaj zog tuaj yeem ua tsis tiav vim kev ntxhov siab lossis kev co.
Daim duab 2. Ib qho cuab yeej ntxuav ID (tsis pom) tau txais kev txhawb nqa los ntawm cov yob uas txav raws tus ID ntawm cov yeeb nkab.Kev tsim cov menyuam yaus zoo txo ​​qhov nyiaj ntawm vuam spatter uas yob rau hauv cov yeeb nkab phab ntsa.Nielsen cov cuab yeej
J356 cov kav dej tau ua tiav hauv cov khoom siv thiab yuav tsum tau muab tso rau hauv lub cub tawg, tab sis qhov no tsis txwv rau.Lub variant, J356A, yog tag nrho machined nyob rau hauv ib tug dov zeb siv built-in induction, ib tug cua sov txheej txheem uas yog sai npaum li cas ntawm cov menyuam lub qhov cub.Qhov no shortens lub sij hawm annealing, yog li nqaim lub qhov rais ntawm lub sij hawm rau decarburization ntawm feeb (los yog txawm teev) mus rau vib nas this.Qhov no muab J356A nrog cov txheej txheem annealing yam tsis muaj oxide lossis decarburization.
Tubing siv rau cov kab hydraulic yuav tsum yoog raws kom khoov, nthuav thiab tsim.Khoov yog tsim nyog kom tau txais cov kua hydraulic los ntawm taw tes A mus rau taw tes B, dhau los ntawm ntau yam khoov thiab tig raws txoj kev, thiab flaring yog tus yuam sij los muab txoj kev sib txuas kawg.
Hauv qhov xwm txheej nqaij qaib-lossis-qe, chimneys tau tsim los rau kev sib txuas ntawm ib lub phab ntsa (yog li muaj qhov sib luag hauv txoj kab uas hla), lossis rov qab tuaj yeem tshwm sim.Nyob rau hauv cov ntaub ntawv no, lub puab nto ntawm lub raj haum snugly tiv thaiv lub qhov (socket) ntawm tus pin connector.Txhawm rau kom muaj kev sib txuas ntawm cov hlau-rau-hlau, qhov saum npoo ntawm cov yeeb nkab yuav tsum du li sai tau.Cov khoom siv no tau tshwm sim nyob rau xyoo 1920 rau US Air Force Air Division.Cov khoom siv no tom qab dhau los ua tus qauv 37-degree flare uas tau siv dav niaj hnub no.
Txij li thaum pib ntawm COVID-19 lub sijhawm, kev xa khoom ntawm cov kav dej sib txuas nrog cov kab nruab nrab hauv lub cev tau txo qis.Cov khoom muaj feem yuav muaj sij hawm xa khoom ntev dua li yav dhau los.Qhov kev hloov pauv hauv cov saw hlau xa khoom tuaj yeem daws tau los ntawm kev tsim kho qhov kawg kev sib txuas.Piv txwv li, ib qho RFQ uas yuav tsum tau muaj ib lub phab ntsa burner thiab qhia tau hais tias J525 yog ib tug neeg sib tw los hloov ob chav phab ntsa burner.Txhua hom hydraulic yeeb nkab tuaj yeem siv nrog qhov kawg kev sib txuas.Qhov no qhib lub sijhawm rau kev siv J356A.
Ntxiv nrog rau kev sib txuas flare, o-ring mechanical seals kuj tseem muaj (saib daim duab 5), tshwj xeeb tshaj yog rau cov tshuab siab.Tsis tsuas yog hom kev sib txuas no tsawg dua-nruj dua li ib-phab ntsa flare vim nws siv elastomeric ntsaws ruaj ruaj, tab sis nws kuj muaj ntau yam - nws tuaj yeem tsim rau qhov kawg ntawm txhua hom hydraulic yeeb nkab.Qhov no muab cov yeeb nkab ua lag luam nrog cov khoom siv sib txuas ntau dua thiab ua tau zoo dua kev lag luam mus sij hawm ntev.
Kev lag luam keeb kwm yog tag nrho ntawm cov piv txwv ntawm cov khoom ib txwm noj hauv paus ib lub sij hawm thaum nws nyuaj rau kev ua lag luam hloov cov kev taw qhia.Ib qho khoom sib tw - txawm tias ib qho uas pheej yig dua thiab ua tau raws li txhua qhov kev xav tau ntawm cov khoom qub - tuaj yeem nyuaj rau kev nce qib hauv kev ua lag luam yog tias muaj kev xav tsis thoob.Qhov no feem ntau tshwm sim thaum tus neeg yuav khoom lossis tus kws ua haujlwm tau txiav txim siab txog qhov tsis yog ib txwm hloov pauv rau cov khoom uas twb muaj lawm.Tsawg tus neeg txaus siab yuav raug tshawb pom.
Qee zaum, kev hloov pauv yuav tsis yog qhov tsim nyog, tab sis tsim nyog.Tus kab mob COVID-19 tau ua rau muaj kev hloov pauv tsis txaus ntseeg hauv qhov muaj qee yam yeeb nkab thiab qhov loj me rau cov kav dej steel.Cov khoom lag luam cuam tshuam yog cov siv hauv tsheb, hluav taws xob, khoom siv hnyav thiab lwm yam kev lag luam yeeb nkab uas siv cov kab siab, tshwj xeeb tshaj yog cov kab hydraulic.
Qhov sib txawv no tuaj yeem ua tiav ntawm tus nqi qis dua los ntawm kev txiav txim siab tsim tab sis niche hom steel yeeb nkab.Kev xaiv cov khoom tsim nyog rau ib daim ntawv thov yuav tsum muaj qee qhov kev tshawb fawb los txiav txim siab cov kua dej sib xws, kev ua haujlwm siab, cov khoom siv thauj khoom, thiab hom kev sib txuas.
Kev saib ze dua ntawm cov lus qhia tshwj xeeb qhia tau tias J356A tuaj yeem sib npaug rau J525 tiag.Txawm hais tias muaj kev sib kis, nws tseem muaj nyob rau ntawm tus nqi qis dua los ntawm cov khoom siv pov thawj.Yog tias kev daws teeb meem qhov kawg yog qhov kev ua haujlwm tsawg dua li kev nrhiav J525, nws tuaj yeem pab OEMs daws cov teeb meem logistical hauv lub sijhawm COVID-19 thiab dhau mus.
Tube & Pipe Journal 于1990 年成为第一本致力于为金属管材行业服务的杂志. Tube & Pipe Journal 1990 Tube & Pipe Journal стал первым журналом, посвященным индустрии металлических труб в 1990 году. Tube & Pipe Journal tau dhau los ua thawj phau ntawv xov xwm tshwj xeeb rau kev lag luam yeeb nkab hlau hauv xyoo 1990.Niaj hnub no, nws tseem tsuas yog kev lag luam luam tawm hauv North America thiab tau dhau los ua cov ntaub ntawv ntseeg siab tshaj plaws rau cov kws tshaj lij kev lag luam yeeb nkab.
Tam sim no nrog tag nrho nkag mus rau FABRICATOR cov ntawv luam tawm digital, nkag tau yooj yim rau cov peev txheej lag luam muaj txiaj ntsig.
Cov ntawv digital ntawm The Tube & Pipe Journal yog tam sim no nkag mus tau yooj yim, muab kev nkag tau yooj yim rau cov khoom lag luam muaj txiaj ntsig.
Tau txais tag nrho cov digital nkag mus rau STAMPING Journal, muaj cov thev naus laus zis tshiab, kev coj ua zoo tshaj plaws thiab xov xwm kev lag luam rau kev lag luam hlau stamping.
Tam sim no nrog rau tag nrho cov kev nkag mus rau Cov Fabricator en Español, koj muaj kev nkag tau yooj yim rau kev lag luam muaj txiaj ntsig.