Raws li kev ua lag luam pressures quab yuam Tube cov tuam tsev kom nrhiav tau cov qauv kev lag luam zoo dua qub.Qhov ntau tus tub tsim khoom siv tau cuam tshuam nrog cov khoom siv tsis xws luag.Qhov chaw kawg txhais tau hais tias thaum siab dua profurity.for cov no yog vim li cas, ntxiv qhov kev sim tsis muaj kev puas tsuaj (NDT) rau lub Hoobkas ua rau muaj txiaj ntsig zoo.
Ntau yam - cov khoom siv, txoj kab uas hla, phab ntsa thickness, txheej txheem ceev thiab txoj kev vuam los yog tsim lub raj - txiav txim siab qhov kev ntsuam xyuas zoo tshaj plaws.Cov yam ntxwv no tseem cuam tshuam rau kev xaiv ntawm cov yam ntxwv hauv txoj kev tshuaj xyuas siv.
Eddy Current Testing (ET) yog siv nyob rau hauv ntau cov yeeb nkab daim ntaub ntawv.Qhov no yog ib tug kuj tsis tshua muaj nqi xeem thiab yuav siv tau nyob rau hauv nyias phab ntsa yeeb nkab daim ntaub ntawv, feem ntau mus txog 0.250 nti phab ntsa thickness.
Sensors lossis test coils poob rau hauv ob pawg hauv paus: wraparound thiab tangential.Encircling coils tshuaj xyuas tag nrho cov hla ntu ntawm lub raj, thaum tangential coils tshuaj xyuas tsuas yog thaj chaw welded.
Muab qhwv ib ncig ntawm cov coils pom qhov tsis xws luag hauv tag nrho cov khoom xa tuaj, tsis yog thaj tsam weld, thiab lawv zoo li yuav ua tau zoo dua thaum kuaj qhov loj me dua 2 ntiv tes hauv txoj kab uas hla.Lawv kuj ua siab ntev ntawm lub ncoo drift.Ib qho teeb meem loj yog tias hla cov khoom xa tuaj los ntawm lub zeb yuav tsum muaj cov kauj ruam ntxiv thiab kev saib xyuas ntxiv kom dhau los ntawm qhov ntsuas coil.Thiab, yog tias qhov ntsuas tau ua tsis tiav. tube rau pop qhib, ua rau lub xeem kauj.
Tangent coils tshuaj xyuas ib feem me me ntawm lub voj voog ntawm lub raj.In loj txoj kab uas hla, siv tangential coils es tsis yog wraparound coils feem ntau yields lub teeb liab zoo-rau-suab nrov piv (ib qho kev ntsuas ntawm lub zog ntawm cov teeb liab ntsuas txheeb ze rau lub teeb liab zoo li qub).Tangent coils kuj tsis tas yuav threads thiab yooj yim rau calibrate tsuas yog sab nraum lub zeb. txoj kab uas hla loj thiab tuaj yeem siv rau qhov me me yog tias txoj haujlwm weld yog tswj tau zoo.
Ob hom coil tuaj yeem kuaj rau qhov tsis sib xws.Kev kuaj tsis raug, tseem hu ua qhov tsis muaj lossis qhov tsis sib xws, tsis tu ncua sib piv cov vuam mus rau ib feem ntawm cov hlau hauv qab thiab nkag siab rau cov kev hloov me me uas tshwm sim los ntawm kev tsis sib xws.Zoo rau kev kuaj xyuas luv luv xws li pinholes lossis dhia welds, thawj txoj kev siv nyob rau hauv feem ntau dov zeb daim ntaub ntawv.
Qhov kev sim thib ob, txoj hauv kev zoo, pom qhov tsis zoo ntawm verbose.Qhov yooj yim tshaj plaws ntawm ET daim ntawv no xav kom tus neeg teb xov tooj siv hluav taws xob sib npaug ntawm cov khoom siv zoo.Ntxiv rau kev nrhiav kev hloov pauv tsis tu ncua, nws kuj pom cov kev hloov pauv ntawm phab ntsa tuab.
Siv ob txoj kev ET no tsis tas yuav muaj teeb meem tshwj xeeb.Yog tias cov cuab yeej tau nruab, lawv tuaj yeem siv ib txhij nrog ib qho kev ntsuas ib zaug.
Thaum kawg, lub cev qhov chaw ntawm lub tester yog ib qho tseem ceeb heev. Cov yam ntxwv xws li ambient kub thiab zeb vibration (hloov mus rau lub raj) tuaj yeem cuam tshuam qhov kev tso kawm.Placing test coil ze rau ntawm lub thawv solder muab tus neeg teb xov tooj tam sim ntawd cov ntaub ntawv hais txog cov txheej txheem soldering.Txawm li cas los xij, qhov ntsuas kub-resistant los yog cov cua txias ntxiv yuav tsum tau.Placing test coil ze rau qhov kawg ntawm cov milling tuaj yeem pom qhov tsis zoo. txheej txheem; Txawm li cas los xij, muaj feem ntau dua ntawm qhov tsis zoo vim tias qhov chaw no coj lub sensor los ze zog rau qhov kev txiav tawm, qhov uas nws muaj feem ntau yuav ntes kev vibration thaum sawing lossis shearing.
Ultrasonic kuaj (UT) siv pulses ntawm hluav taws xob lub zog thiab hloov nws mus rau hauv lub suab nrov zaus zog.Cov suab nthwv dej no raug xa mus rau cov khoom hauv kev sim los ntawm kev tshaj tawm xws li dej los yog zeb coolant.Sound yog directional; qhov kev taw qhia ntawm lub sensor txiav txim siab seb lub kaw lus tab tom nrhiav qhov tsis xws luag lossis ntsuas phab ntsa thickness.Ib txheej ntawm cov transducers tuaj yeem tsim cov qauv ntawm qhov chaw weld.The UT txoj kev tsis txwv los ntawm lub raj phab ntsa thickness.
Txhawm rau siv cov txheej txheem UT ua cov cuab yeej ntsuas, tus neeg teb xov tooj yuav tsum tau taw qhia lub transducer kom nws yog perpendicular mus rau lub raj.Sound nthwv dej nkag mus rau OD mus rau lub raj, thaws tawm ntawm ID, thiab rov qab mus rau lub transducer.Qhov system ntsuas lub sij hawm-ntawm-flight - lub sij hawm nws yuav siv sij hawm rau lub suab yoj mus los ntawm OD mus rau ID - thiab hloov lub sij hawm.De ntsuas lub thickness ntawm cov phab ntsa. Qhov tseeb ntawm ± 0.001 nti.
Txhawm rau pom cov khoom tsis xws luag, tus neeg teb xov tooj tso lub transducer ntawm oblique lub kaum ntse ntse.Sound nthwv dej nkag los ntawm OD, mus rau ID, rov qab mus rau OD, thiab taug kev raws phab ntsa li ntawd.Qhov vuam tsis sib txuas ua rau lub suab nthwv dej xav txog; nws yuav siv tib txoj kev rov qab mus rau lub sensor, uas hloov nws rov qab mus rau hauv hluav taws xob lub zog thiab tsim ib qho kev pom uas qhia qhov chaw ntawm qhov tsis xws luag.Lub teeb liab kuj dhau los ntawm lub rooj vag tsis xws luag, uas yog ua rau lub tswb ceeb toom rau tus neeg teb xov tooj lossis ua rau cov xim pleev xim rau qhov chaw ntawm qhov tsis xws luag.
UT tshuab siv tau ib qho transducer (los yog ntau yam siv lead ua transducers) lossis phased array transducers.
Cov tsoos UTs siv ib lossis ntau dua ib qho siv lead ua transducers.Cov naj npawb ntawm cov sensors nyob ntawm qhov xav tau qhov tsis xws luag ntev, kab ceev thiab lwm yam kev xeem yuav tsum tau ua.
Phased array UTs siv ntau lub ntsiab lus transducer hauv lub cev.Qhov kev tswj xyuas hluav taws xob tswj lub suab tsis muaj qhov hloov pauv cov ntsiab lus los soj ntsuam qhov chaw weld.Lub kaw lus tuaj yeem ua ntau yam haujlwm, xws li kev kuaj xyuas qhov tsis xws luag, ntsuas phab ntsa thickness, thiab saib xyuas cov kev hloov hauv weld cheeb tsam tu.Cov tshuaj xyuas thiab ntsuas cov qauv no tuaj yeem ua tau yooj yim substananely. phased-array mus kom ze tuaj yeem zam tau qee qhov vuam drift vim hais tias cov array tuaj yeem npog thaj tsam loj dua li cov khoom siv qhov chaw ruaj khov.
Ib txoj kev NDT thib peb, Sib Nqus Leakage (MFL), yog siv los tshuaj xyuas txoj kab uas hla loj, tuab phab ntsa, cov kav hlau nplaum sib nqus.Nws yog qhov zoo tagnrho rau kev siv roj thiab roj.
MFLs siv lub zog DC magnetic teb uas dhau los ntawm lub raj lossis lub raj phab ntsa.Qhov magnetic teb lub zog mus txog tag nrho cov saturation, los yog qhov taw tes ntawm qhov kev nce hauv lub zog hlau nplaum tsis ua rau muaj kev nce ntxiv hauv cov hlau nplaum sib nqus.
Ib qho yooj yim hlau-hloov sojntsuam dhau los ntawm qhov chaw sib nqus tuaj yeem ntes cov npuas no.Raws li cov ntaub ntawv nrog rau lwm cov kev siv sib nqus induction, lub kaw lus yuav tsum muaj kev sib txheeb ntawm cov khoom hauv kev sim thiab kev sojntsuam.Qhov kev txav no yog ua tiav los ntawm rotating cov hlau nplaum thiab sojntsuam los ua ke nyob ib ncig ntawm lub voj voog ntawm lub raj lossis cov yeeb nkab. Kom ua kom ceev, qhov kev teeb tsa no siv ntau qhov kev sojntsuam los yog kev sojntsuam ntxiv.
Lub rotating MFL chav tsev tuaj yeem tshawb pom qhov ntev lossis qhov tsis sib xws.Qhov sib txawv yog nyob rau hauv kev taw qhia ntawm cov qauv hlau nplaum thiab cov qauv tsim.
MFL zoo ib yam li ET thiab ob qho tib si ntxiv rau ib leeg.ET yog tsim rau cov khoom siv phab ntsa thicknesses tsawg dua 0.250 nti, thaum MFL yog siv rau cov khoom nrog phab ntsa thicknesses ntau dua qhov no.
Ib qho txiaj ntsig ntawm MFL dhau UT yog nws lub peev xwm los txheeb xyuas qhov tsis zoo tshaj qhov zoo tshaj plaws.Piv txwv li, MFL tuaj yeem tshawb pom qhov tsis xws luag helical yooj yim.Cov kev tsis zoo hauv cov lus qhia oblique tuaj yeem kuaj pom los ntawm UT, tab sis xav tau cov chaw tshwj xeeb rau lub kaum sab xis xav tau.
Xav paub ntau ntxiv txog cov ncauj lus no?Lub Koom Haum Chaw Tsim Khoom thiab Chaw Tsim Khoom (FMA) muaj ntau dua.Tus kws sau ntawv Phil Meinczinger thiab William Hoffmann yuav muab ib hnub ntawm cov ntaub ntawv thiab kev taw qhia ntawm cov hauv paus ntsiab lus, cov khoom siv, kev teeb tsa thiab kev siv cov txheej txheem no.Lub rooj sib tham tau muaj rau lub Kaum Ib Hlis 10 ntawm FMA lub hauv paus chaw ua haujlwm hauv Elgin, Illinois (ze li qhib rau Chicagoson).Reg.
Tube & Pipe Journal tau dhau los ua thawj phau ntawv xov xwm mob siab rau ua haujlwm rau kev lag luam yeeb nkab hlau hauv xyoo 1990.Hnub no, nws tseem yog qhov kev tshaj tawm nkaus xwb hauv North America mob siab rau kev lag luam thiab tau dhau los ua cov ntaub ntawv ntseeg siab tshaj plaws rau cov kws tshaj lij yeeb nkab.
Tam sim no nrog kev nkag mus rau tag nrho cov ntawv digital ntawm FABRICATOR, yooj yim nkag mus rau cov peev txheej tseem ceeb hauv kev lag luam.
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.
Txaus siab rau kev nkag mus rau tag nrho cov ntawv luam tawm digital ntawm STAMPING Journal, uas muab cov txheej txheem 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 kev nkag mus rau tag nrho cov ntawv digital ntawm Tus Fabricator en Español, yooj yim nkag mus rau cov peev txheej tseem ceeb hauv kev lag luam.