- Ultrasonic tshuaj xyuas thaum lub sij hawm ntau lawm txheej txheem ntawm ERW welded kav
Ultrasonic xeem yog tam sim no lub ntsiab tsis-destructive xeem txoj kev nyob rau hauv cov txheej txheem ntau lawm ntawm ERW welded kav. Nws lub ntsiab daim ntawv thov thaj chaw muaj xws li: 1) Ultrasonic online kuaj cov hlau daim hlau. 2) Ultrasonic tshuaj xyuas hauv internet ntawm vuam seams tom qab ERW vuam thiab sab hauv thiab sab nraud burr tshem tawm. 3) Kev tshuaj xyuas offline ntawm ERW welds. 4) Ultrasonic kuaj ntawm ERW welded yeeb nkab kawg.
1. Ultrasonic tshuaj xyuas hauv internet ntawm steel daim hlau
Ultrasonic yoj online nrhiav pom cov hlau phaj feem ntau siv dual siv lead ua lossis polycrystalline sojntsuam, ua ke nrog cov yeeb yaj kiab dej lossis cov dej hauv zos immersion. Nws lub hom phiaj tseem ceeb yog txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau tawg). Muaj ob txoj hauv kev scanning tseem ceeb: ua ntej, luam theej duab raws cov kab sib txuas hauv cov kev taw qhia dov; Thib ob, steel phaj txav linearly raws lub dov kev taw qhia, thiab cov kev sojntsuam reciprocates perpendicular mus rau cov kev taw qhia ntawm steel yeeb nkab txav, tsim ib tug "z" zoo li scan. Txij li cov ntug ntawm cov hlau phaj tsim ib qho kev sib txuas hauv ERW tom ntej vuam, kev tshawb nrhiav qhov tsis xws ntawm no yog qhov tseem ceeb tshwj xeeb hauv kev kuaj ultrasonic ntawm cov hlau phaj. Cov qauv tsim nyog thiab cov lus qhia tshwj xeeb xav tau 100% scanning ntawm ntug ntawm cov phaj steel. Hauv kev ua haujlwm tiag tiag, Feem ntau, qhov no tau lees paub los ntawm kev nce tus naj npawb ntawm kev sojntsuam ntawm ntug ntawm cov hlau phaj.
2. Ultrasonic hauv internet soj ntsuam ntawm welds
ERW weld ultrasonic kuaj hauv online yog ua tom qab vuam thiab sab hauv thiab sab nraud burr tshem tawm. Nws feem ntau suav nrog ob ntu: Ua ntej, siv A scan lossis B scan txhawm rau txheeb xyuas qhov cuam tshuam ntawm sab hauv thiab sab nraud burrs. Piv nrog A scan, B scan tuaj yeem tso saib cov phab ntsa sab hauv morphology ntawm cov vuam tom qab tshem tawm cov burrs sab hauv lub sijhawm, thiab cov duab nraaj yog qhov xav tau ntau dua; Qhov thib ob, qhov ntev nthwv dej yog obliquely tshwm sim, thiab lub transverse nthwv dej tsim los ntawm nws cov refraction nyob rau hauv cov yeeb nkab welded yog siv los xyuas cov vuam tsis xws luag. Txij li thaum lub vuam kub yog qhov siab heev nyob rau lub sijhawm no, kev tshuaj xyuas hauv online feem ntau siv cov ntsuas kub kub thiab siv cov dej hauv zos immersion txoj kev.
3. Weld ultrasonic offline soj ntsuam thiab cov yeeb nkab kawg tshuaj xyuas
Offline ultrasonic kuaj ntawm ERW welds feem ntau ua tom qab kuaj hydrostatic thiab chamfering, thiab feem ntau yog siv los xyuas qhov ntev ntawm qhov tsis xws luag hauv thaj chaw weld thiab tshav kub. Txhawm rau txhim kho kev tshawb pom kev ua haujlwm, kev tshawb nrhiav tsis siv neeg feem ntau yog siv. Vim muaj kev cuam tshuam ntawm qhov muag tsis pom ntawm qhov kawg ntawm cov yeeb nkab hauv kev tshawb nrhiav tsis siv neeg. Tom qab ntawd, phau ntawv ultrasonic scanning ntawm cov welds feem ntau yog ntxiv. Cov ntsiab lus ntawm cov yeeb nkab kawg tshuaj xyuas feem ntau suav nrog kev tshawb pom ntawm cov yeeb nkab kawg welds, yeeb nkab kawg cov khoom siv txheej txheej tsis xws luag, thiab axial thiab circumferential defects. Kev tshawb pom ntawm cov txheej txheem tsis xws luag feem ntau siv cov kev sojntsuam sib cais, thiab qhov tsis xws ntawm axial nyob rau hauv cov khoom siv vuam thiab cov hauv paus yog thiab qhov tsis xws luag feem ntau yog kuaj nrog oblique sojntsuam.
- Kev xaiv cov txheej txheem rau ERW weld ultrasonic kuaj
Kev kuaj ultrasonic ntawm ERW welds feem ntau suav nrog ob txoj hauv kev: kev ntsuas tsis siv neeg thiab kev ntsuas phau ntawv. Tam sim no, kev tshawb nrhiav tsis siv neeg ntawm ERW welds feem ntau siv ob daim ntawv: kev tshawb nrhiav lub log thiab kev tshawb nrhiav dej hauv zos. Kev tshuaj xyuas tsis siv neeg muaj qhov zoo ntawm kev tshawb pom kev ua haujlwm siab thiab ceev ceev, tab sis nws tsis yog qhov tsim nyog rau qhov tseeb qhov chaw ntawm qhov tsis xws luag thiab kev soj ntsuam zoo thiab ntau npaum li cas; Hauv kev sib piv, kev tshuaj xyuas phau ntawv yog hloov tau yooj yim dua, tsis yog tsuas yog tuaj yeem ua qhov tsis xws luag, tab sis kuj ua kom muaj txiaj ntsig zoo thiab ntau qhov kev tshuaj xyuas ntawm qhov tsis xws luag los ntawm ncha tus yam ntxwv thiab dynamic waveforms. Kev kuaj pom los ntawm tsis siv neeg ultrasonic tsis yog feem ntau paub tseeb tias siv phau ntawv txoj kev. Cov txheej txheem uas yuav tsum tau txiav txim siab rau kev kuaj ultrasonic ntawm ERW welds muaj xws li lub kaum sab xis refraction, lub suab beam dav, thiab kuaj pom zaus.
1. Xaiv lub kaum sab xis refraction
Ultrasonic kuaj ntawm ERW welds feem ntau txais cov nthwv dej ntev nrog oblique xwm txheej. Kev kuaj pom yog ua tiav los ntawm kev tsim cov nthwv dej hla dhau los ntawm kev hloov pauv nthwv dej hauv cov khoom ua haujlwm thiab vuam. Ob lub hauv paus ntsiab lus yog: 1) Ntshiab transverse nthwv dej zoo siab nyob rau hauv lub hauv paus hlau thiab vuam. 2) Lub transverse yoj suab beam scans lub puab phab ntsa ntawm cov yeeb nkab steel.
2. Kev xaiv ntawm kev kuaj xyuas zaus
Qhov ntau zaus ntawm kev kuaj ultrasonic yog dav, feem ntau 0.5-10MHz. Kev xaiv ntawm zaus yuav tsum tau xav txog cov hauv qab no:
(1) Lub rhiab heev ntawm ultrasonic nrhiav tau yog hais txog ib nrab ntawm lub wavelength. Kev nce qhov zaus yog qhov zoo rau kev nrhiav qhov tsis xws luag. Tsis tas li ntawd, qhov siab dua qhov zaus, qhov me me ntawm lub mem tes dav thiab qhov siab dua qhov kev daws teeb meem.
(2) Muaj zaus, luv wavelength, me me ib nrab diffusion lub kaum sab xis, zoo suab beam directivity, thiab concentrated zog muaj txiaj ntsig zoo rau kev tshawb nrhiav thiab nrhiav qhov tsis xws luag. Tab sis rau tib lub nti loj, qhov ntau zaus, qhov loj dua qhov chaw nyob ze, uas yog qhov cuam tshuam ntau dua rau kev kuaj pom.
(3) Raws li qhov zaus nce, qhov tawg thiab nqus attenuation ntawm ultrasonic tsis nce sharply, uas yog detrimental mus nrhiav kom tau.
Thaum kuaj, ntau yam yuav tsum tau txiav txim siab ua tiav thiab qhov ntsuas zaus yuav tsum raug xaiv kom tsim nyog. Rau ERW welded kav, cov khoom siv hauv paus feem ntau yog kub dov coils nrog cov nplej zoo. Qhov dav ntawm thaj chaw weld fusion thiab tshav kub-tshuaj lom tom qab induction cua sov thiab extrusion molding yog nqaim, thiab nws cov nplej loj yog qhov tseem ceeb tib yam li cov khoom siv hauv paus. Hauv kev ua haujlwm tiag tiag, txhawm rau kom tau txais kev daws teeb meem siab dua, yuav tsum xaiv qhov zaus ntau dua li qhov ua tau thaum ua kom paub tseeb tias qhov kev xav tau, feem ntau ntawm 2.5-5MHz.
- Daim ntawv xeem thaiv
Qhov kev siv ntsuas thaiv yog lub hauv paus rau kev txiav txim siab ntawm kev kuaj ultrasonic ntawm ERW welds. API 5L thiab GB / T9711 cov qauv yuav tsum tau siv cov kev sib piv sim thaiv nrog N10 grooves los yog 3.2 hli ntsug qhov kom muaj kev cuam tshuam txog kev kuaj ultrasonic ntawm steel yeeb nkab welds. 100% ntawm lub cev ncha yog siv los ua qhov kev txiav txim siab tsis raug.
- Xaus
(1) Hauv kev ntsuam xyuas ultrasonic ntawm ERW welded kav, txhawm rau xyuas kom meej tias cov nthwv dej tsis huv tau zoo siab nyob rau hauv cov kav dej welded thiab luam theej duab cov phab ntsa ntawm cov kav dej, qhov qis qis ntawm shear wave refraction kaum sab xis ntawm cov kav dej welded. yog 33.2 degrees, thiab nws sab sauv txwv nyob rau hauv thiab sab nraud txoj kab uas hla piv r / R ntawm welded kav. Nws hloov nrog kev hloov ntawm r / R. Qhov loj dua tus nqi ntawm r / R, qhov dav nws qhov ntau.
(2) Thaum lub suab beam refraction lub kaum sab xis ntawm lub phab ntsa ntawm cov yeeb nkab welded yog 45 degrees, nws muaj kev paub zoo siab rau qhov chaw qhib qhov tsis xws luag hauv thaj chaw weld thiab tshav kub. Txawm li cas los xij, txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau, nws yuav tsum tau siv cov yoj yoj yoj yoj yoj acoustic beams nrog lub kaum ntse ntse loj yuav tsum tau siv rau kev soj ntsuam.
(3) Qhov dav ntawm lub suab nrov ntawm pab pawg tua hluav taws yuav tsum raug txiav txim siab raws li lub transverse yoj refraction lub kaum sab xis thiab txoj kab uas hla ntawm cov yeeb nkab steel. Nws yog ib qho tsim nyog los xyuas kom meej tias cov ntug sab saud ntawm lub suab beam tsis excite nto vuag nyob rau hauv cov yeeb nkab welded, thiab kom tsis txhob muaj qhov tshwm sim ntawm refracted longitudinal tsis nyob rau hauv cov yeeb nkab welded.
