Longitudinally welded steel kav yuav categorized rau hauv high-frequency longitudinally welded steel kav thiab submerged arc welded longitudinally welded steel kav raws li lawv cov txheej txheem ntau lawm. Hauv qab no yog cov txheej txheem tsim ntawm ntau hom: high-frequency thiab submerged arc welded longitudinally welded steel kav.
Submerged Arc Welding (SAW)
Tom qab nkag mus rau hauv cov kab ntau lawm, steel daim hlau npaj rau loj-inch submerged arc welded longitudinally welded steel kav undergo tag nrho-phaj ultrasonic tshuaj xyuas. Ob lub npoo ntawm lub phaj steel yog ob sab milled los ntawm lub ntug milling tshuab kom ua tiav qhov yuav tsum tau phaj dav, parallelism ntawm phaj npoo, thiab zawj duab. Pre-bending yog ua los ntawm kev siv lub tshuab ua ntej-bending los qhia qhov yuav tsum tau curvature rau cov npoo phaj. Ntawm JCO txoj kev tshuab, ib nrab ntawm cov hlau phaj ua ntej yog nias rau hauv "J" zoo los ntawm ntau cov kauj ruam stamping, thaum lwm ib nrab yog zoo li khoov mus rau hauv "C" zoo, thaum kawg tsim ib qho qhib "O" zoo li. .
Cov yeeb nkab tsim tau raug kaw thiab txuas txuas txuas ntxiv siv roj hlau arc vuam (MAG). Tom qab ntawd, ntau cov xaim submerged arc vuam (txog plaub lub xov hlau) yog ua haujlwm rau vuam hauv cov yeeb nkab, ua raws li cov txheej txheem tib yam nyob rau sab nraud ntawm submerged arc welded longitudinally welded steel yeeb nkab. Tom qab vuam, cov yeeb nkab tau dhau los ntawm kev tshuaj ntsuam xyuas: thawj zaug kev tshuaj xyuas ultrasonic (feem ntau tshuaj xyuas cov vuam seam thiab cov khoom siv hauv ob sab), thawj X-ray tshuaj xyuas (kom paub tseeb tias qhov tsis pom kev rhiab heev), nthuav dav, thiab kev sim hydrostatic (nrog rau tsis siv neeg cov ntaub ntawv khaws cia).
Tom qab ntawd cov kav dej tsim nyog tau ua tiav kom tau raws li qhov yuav tsum tau ua thiab tau txais kev tshuaj ntsuam xyuas ultrasonic thib ob, kuaj X-ray thib ob, tshuaj xyuas cov khoom sib nqus ntawm cov yeeb nkab kawg, tiv thaiv corrosion, thiab txheej, ua tiav tag nrho cov txheej txheem tsim khoom.
High-Frequency Vuam (HFW)
High-frequency welding heats cov hlau ntawm ntug vuam mus rau lub xeev molten raws li cov hauv paus ntsiab lus ntawm electromagnetic induction, cov nyhuv ntawm daim tawv nqaij, cov nyhuv sib thooj, thiab eddy tam sim no cua sov nyhuv ntawm alternating tam sim no nyob rau hauv conductors. Tom qab ntawd cov npoo molten yog nias ua ke los ntawm cov yob, ua tiav intercrystalline kev sib txuas ntawm lub pob tw weld. Raws li kev siv vuam induction (los yog lub siab sib cuag vuam) txoj kev, HFW yuav tsum tsis muaj cov khoom muab tub lim, ua tsis muaj vuam spatter, thiab ua rau muaj kev cuam tshuam ntawm qhov nqaim, qhov zoo nkauj zoo nkauj welds, thiab cov khoom siv zoo heev, ua rau nws siv dav hauv cov yeeb nkab steel. .
Nyob rau hauv high-frequency welding ntawm steel kav, alternating tam sim no cov tawv nqaij nyhuv thiab cov nyhuv sib thooj yog siv. Tom qab yob txoj kev, cov hlau (strip steel) tsim ib lub voj voos yeeb nkab nrog ib ntu ntu ntu. Nyob rau hauv cov yeeb nkab billet, nyob ze ntawm qhov chaw ntawm lub induction kauj, ib tug los yog ib tug txheej ntawm impedances (magnetic bars) tig, tsim ib tug electromagnetic induction voj nrog cov yeeb nkab billet qhib. Nyob rau hauv cov nyhuv ntawm daim tawv nqaij thiab cov nyhuv sib thooj, lub zog muaj zog thiab cov ntsiab lus kub yog tsim nyob rau ntawm ntug ntawm cov yeeb nkab billet qhib, ua kom sov lub vuam ntug mus rau qhov kub thiab txias. Thaum compression los ntawm rollers, cov hlau molten ua tiav intercrystalline bonding, txias kom tsim tau lub pob tw muaj zog.
