Ultrasonic thickness gauge ntsuas yuam kev yog vim li cas tsom xam
Qhia tus nqi yog loj dhau los yog me me yog vim li cas kev tsom xam hauv kev ua haujlwm nrhiav kom pom tseeb, feem ntau ntsib qhov ntsuas qhov ntsuas thickness thiab tus nqi tsim (los yog xav tau tus nqi) piv rau qhov pom tseeb loj lossis me, cov laj thawj raug txheeb xyuas raws li hauv qab no:
(1, cov ntaub ntawv laminated, cov ntaub ntawv sib xyaw (tsis yog homogeneous), ntsuas cov khoom siv laminated tsis tuaj yeem ua tsis tau, vim tias ultrasonic tsis tuaj yeem nkag mus rau qhov chaw tsis sib xws, thiab tsis tuaj yeem nyob rau hauv cov ntaub ntawv sib xyaw (tsis yog homogeneous) propagated ntawm ib tug uniform. Kev ceev rau cov cuab yeej ua los ntawm ntau txheej txheej wrapping (xws li urea high-pressure khoom), thickness ntsuas yuav tsum tau them tshwj xeeb mloog mus rau, lub thickness gauge tsuas yog qhia lub thickness ntawm txheej ntawm cov khoom nyob rau hauv kev sib cuag nrog cov sojntsuam.
(2, qhov kev xaiv tsis raug ntawm lub suab nrawm. Ua ntej ntsuas lub workpiece, raws li hom khoom preset nws ceev ntawm lub suab los yog raws li tus qauv thaiv rov qab- ntsuas qhov ceev ntawm lub suab. feem ntau siv cov thaiv thaiv rau steel) thiab mus ntsuas lwm yam khoom, yuav ua rau muaj qhov yuam kev.
(3, qhov tshwm sim ntawm qhov kub thiab txias. Cov khoom siv dav dav hauv qhov ceev ntawm lub suab nrog nws qhov kub thiab txias nce thiab txo qis, muaj cov ntaub ntawv kuaj pom tias cov khoom kub kub txhua qhov nce ntawm 100 ° C, qhov ceev ntawm lub suab txo los ntawm 1%. -temperature in-service equipment feem ntau ntsib qhov teeb meem no.
(4, kev cuam tshuam ntawm coupling agent. Coupling tus neeg saib xyuas yog siv los tshem tawm cov huab cua ntawm qhov kev sojntsuam thiab cov khoom nyob rau hauv kev sim, kom ultrasonic tsis tuaj yeem nkag mus rau lub workpiece kom ua tiav lub hom phiaj ntawm kev kuaj pom. Yog tias xaiv hom lossis siv. ntawm txoj kev tsis tsim nyog, yuav ua rau tsis raug lossis coupling kos npe flicker, tsis tuaj yeem ntsuas hauv kev xyaum, vim yog siv cov coupling tus neeg saib xyuas siv ntau dhau, ua rau qhov kev sojntsuam deb ntawm lub workpiece, qhov ntsuas qhia txog tus nqi ntawm cov coupling agent txheej. thickness tus nqi.
(5, cov khoom ntsuas (xws li cov kav dej) nyob rau hauv qhov tso nyiaj, thaum qhov tso nyiaj thiab qhov sib txawv ntawm qhov workpiece acoustic impedance tsis loj, lub thickness gauge zaub tus nqi rau phab ntsa thickness ntxiv rau deposit thickness.
(6, hais txog cov hlau saum npoo av oxides. Hlau pleev xim rau cov khoom, tab sis kev sib xyaw ua ke los ntawm cov khoom sib xyaw, tab sis cov xim sib xyaw ua ke, tab sis qhov nrawm ntawm suab hais nyob hauv ob qho khoom yog qhov sib txawv, ua rau muaj kev ua yuam kev, thiab nrog lub thickness ntawm lub hau sib txawv, qhov loj ntawm qhov yuam kev kuj txawv.
(7, thaum muaj qhov tsis xws luag nyob rau hauv cov khoom (xws li inclusions, interlayers, thiab lwm yam), cov zaub muaj nqis txog li 70% ntawm nominal thickness (lub sij hawm no siv ultrasonic flaw detector rau ntxiv defect nrhiav kom tau).
(8, qhov cuam tshuam ntawm kev ntxhov siab. Cov khoom siv hauv kev pabcuam, cov kav dej, feem ntau ntawm qhov muaj kev ntxhov siab, cov khoom siv kev ntxhov siab muaj qee yam cuam tshuam rau lub suab nrawm, thaum cov kev taw qhia ntawm kev ntxhov siab thiab kev nthuav tawm yog tib yam, yog tias qhov kev ntxhov siab yog compressive kev ntxhov siab, qhov kev ntxhov siab ntawm lub workpiece elasticity nce, qhov nrawm ntawm lub suab hloov pauv, yog tias qhov kev ntxhov siab yog tensile kev nyuaj siab, qhov ceev ntawm lub suab qeeb thaum lub zog thiab yoj propagation kev taw qhia tsis zoo ib yam, hloov hauv cov txheej txheem ntawm huab hwm coj kev co trajectory los ntawm kev ntxhov siab cuam tshuam, yoj propagation kev taw qhia sib txawv raws li cov ntaub ntawv, qhov kev ntxhov siab dav dav nce, lub suab nrawm nrawm.
