- Txij li thaum xyoo 1930, nrog rau kev txhim kho sai ntawm cov khoom siv zoo tshaj plaws ntawm cov hlau txuas txuas ntxiv thiab kev nce qib ntawm vuam thiab tshuaj xyuas tshuab, qhov zoo ntawm cov vuam seam yog kev txhim kho tas li, ntau yam kev qhia tshwj xeeb ntawm welded steel yeeb nkab yog nce, thiab ntau dua. thiab ntau qhov chaw los hloov cov seamless steel yeeb nkab. Welded steel yeeb nkab yog muab faib ua ncaj seam welded yeeb nkab thiab kauv welded yeeb nkab raws li daim ntawv ntawm weld seam. Kev faib tawm los ntawm cov txheej txheem ntau lawm: txheej txheem kev faib tawm - arc welded yeeb nkab, tsis kam welded yeeb nkab, (high-frequency, low-frequency) gas welded yeeb nkab, rauv welded yeeb nkab.
- Me me txoj kab uas hla welded yeeb nkab siv ncaj seam vuam, txoj kab uas hla loj welded yeeb nkab yog ntau kauv vuam; Raws li cov duab ntawm qhov kawg ntawm cov yeeb nkab yog muab faib ua puag ncig welded yeeb nkab thiab zoo li tus (square, rectangular, thiab lwm yam) welded yeeb nkab; Raws li cov khoom siv thiab siv ntau hom welded steel yeeb nkab rau kev thauj cov dej hauv mines, galvanized welded steel yeeb nkab rau cov dej tsis tshua muaj siab, welded steel yeeb nkab rau txoj siv conveyor yob, thiab lwm yam.
- Welded yeeb nkab feem ntau siv cov ntaub ntawv yog: Q235A, Q235C, Q235B, 16Mn, 20#, Q345, L245, L290, X42, X46, X60, X80, 0Cr13, 1Cr17, {{16} }Cr19Ni11, 1Cr18Ni9, 0Cr18Ni11Nb thiab lwm yam.
- Eddy tam sim no qhov tsis txaus ntseeg nrhiav pom, yog ib qho ntawm tsib txoj kev sim tsis muaj kev puas tsuaj. Nws tuaj yeem tshawb pom qhov tsis xws luag thiab nyob ze ntawm qhov chaw ntawm tus neeg xyuas pib, thiab tau siv dav hauv kev tshawb nrhiav cov raj thiab cov xov hlau hauv aerospace, nuclear zog, roj av thiab boiler teb.
- Lub hauv paus ntsiab lus ntawm eddy tam sim no flaw detection:
Eddy tam sim no yog ib txoj kev kuaj tsis muaj kev puas tsuaj raws li electromagnetic induction.
Nws yog qhov tsim nyog rau kev kuaj xyuas qhov tsis xws luag ntawm lossis ze ntawm qhov chaw ntawm cov khoom siv hluav taws xob, thiab siv rau hauv thaj chaw ntawm cov kav dej txuas ntxiv kom pom qhov tsis xws luag ntawm cov hlau phaj, qhov chaw tsis xws luag ntawm cov kav dej txuas ntxiv, thiab vuam tsis xws luag ntawm qhov ntev ntawm cov welds ntawm nruam. cov kav dej.
- Yuav ua li cas lub eddy tam sim no flaw detector pom cov roj txuas txuas ntxiv:
Raws li kev faib tawm ntawm txoj kev siv, qhov kev tshawb nrhiav chev tuaj yeem muab faib ua: cov kauj tsis meej, tus kheej qhov sib piv, nws piv coil. Tsis tshua muaj coils thiab tus kheej-ratio coils feem ntau yog siv rau hauv cov txheej txheem tsim cov roj yeeb nkab txuas ntxiv.
Lub eddy tam sim no detector generates alternating tam sim no los muab lub excitation coil, lub excitation kauj generates alternating magnetic teb, alternating magnetic teb generates eddy tam sim no nyob rau saum npoo ntawm cov roj yeeb nkab txuas ntxiv, cov eddy tam sim no cuam tshuam los ntawm qhov tsis xws luag thiab nyob rau hauv lem muaj feem xyuam rau lub eddy tam sim no. absolute coil los yog nws tus kheej-kev sib piv coil kom nws hloov, thiab tom qab ntawd los ntawm kev nthuav dav thiab kev ua haujlwm ntawm cov teeb liab, nws tau txais lub meej theem teeb liab, lub meej amplitude teeb liab thiab tus kheej sib piv theem teeb liab thiab nws tus kheej sib piv amplitude teeb liab.
- Cov yam ntxwv ntawm eddy tam sim no flaw detection txoj kev yog:
① Tsis tas yuav tsum muaj tus neeg sawv cev sib txuas, thiab nws tuaj yeem nqa tawm tsis sib cuag;
② ceev nrooj tsis pom kev, tuaj yeem ua tiav hauv online ntau lawm (txog 3 m / s, 2m / s hauv ib txwm tsim), ntxiv rau kev kho thiab hloov lub sijhawm tshwj xeeb yog luv (feem ntau 10 ~ 20min);
③ Nws tuaj yeem txheeb xyuas qhov vuam seam ntawm qhov kub thiab txias welded yeeb nkab;
④ kev ntseeg siab ntawm qhov tsis txaus ntseeg tau pom. Vim qhov ceev ceev ntawm eddy tam sim no qhov tsis pom kev, los ntawm cov kauj ruam eddy tam sim no qhov teeb meem nrhiav pom txoj kev tau dav siv rau ntau xyoo los xyuas qhov zoo ntawm cov yeeb nkab welded, tshwj xeeb tshaj yog nws qhov ntom, tab sis nws yog ib qho nyuaj rau kev kuaj xyuas cov kab nrib pleb ntev hauv cov welded. seam ntawm ferromagnetic welded yeeb nkab.
- Yog li ntawd, nyob rau hauv tus txheej txheem siab ntawm eddy tam sim no nrhiav kom tau, feem ntau siv cov sojntsuam coil eddy tam sim no nrhiav kom tau txoj kev. Rau "sab hauv burr adsorption" uas feem ntau tshwm sim nyob rau hauv welded yeeb nkab seams, eddy tam sim no kuaj cov khoom feem ntau misreported nws raws li ib tug tsis xws luag.
Feem ntau tshwm sim ntawm eddy tam sim no qhov teeb meem nrhiav kom tau cov txheej txheem vim lub electromagnetic quab yuam nyob rau hauv lub burr adsorption ntawm lub weld, tawm hauv eddy tam sim no magnetic teb tom qab cov steel yeeb nkab tiv tauj tsis siv neeg demagnetisation ntaus ntawv, tsis muaj magnetic attraction nyob rau hauv lub burr cia li poob, thiab ces phau ntawv re- kev ntsuam xyuas thiab tsis muaj qhov tsis xws luag los qhia qhov teeb meem txaj muag. Vim yog cov nyhuv ntawm daim tawv nqaij, nrog rau qhov nce nyob rau hauv qhov kev ncua deb ntawm lub soj ntsuam welded yeeb nkab thiab lub detection coil, nws nrhiav kom tau rhiab heev yuav maj mam txo, yog li ntawd, rau tib qhov me me tsis xws luag, nyob rau hauv lub puab phab ntsa ntawm cov yeeb nkab reflected nyob rau hauv lub teeb liab amplitude yuav. yuav tsum me dua qhov tsis xws luag ntawm cov phab ntsa sab nrauv ntawm cov yeeb nkab.
- Welded yeeb nkab tag nrho-lub cev eddy tam sim no flaw detection khoom nyob rau hauv lub nrhiav kom tau ntawm qhov tsis xws luag nyob rau hauv lub sab nrauv thiab sab hauv ntawm lub welded yeeb nkab, yog txiav txim los ntawm ntau yam, tab sis qhov tseem ceeb tshaj plaws tseem nyob ntawm phab ntsa thickness ntawm cov tshuaj welded yeeb nkab thiab eddy tam sim no excitation zaus thiab sib nqus saturation siv; Nyob rau tib lub sij hawm, nyob rau hauv kev xaiv ntawm ntsuas ntsuas, yuav tsum tau coj mus rau hauv tus account lub soj ntsuam welded yeeb nkab hluav taws xob conductivity thiab permeability thiab lwm yam lub cev tsis muaj feem xyuam rau qhov tseeb ntawm eddy tam sim no flaw nrhiav kom tau.
