H-shaped steel yog ib hom tshiab ntawm kev siv nyiaj txiag. H-shaped steel muaj kev lag luam thiab tsim nyog tus ntoo khaub lig-section zoo thiab zoo txhua yam khoom. Thaum lub sij hawm dov, qhov txuas ntxiv ntawm txhua lub ntsiab lus ntawm ntu ntu yog qhov sib xws thiab qhov kev ntxhov siab sab hauv me me. Piv nrog rau cov hlau I-beam zoo tib yam, nws muaj qhov zoo ntawm qhov loj me me, lub teeb yuag thiab txuag cov hlau, uas tuaj yeem ua rau cov vaj tse Cov qauv raug txo los ntawm 30-40%; thiab vim hais tias sab hauv thiab sab nraud ntawm ob txhais ceg yog tib yam thiab ob txhais ceg xaus ntawm txoj cai kaum, lawv tuaj yeem sib sau ua ke, uas tuaj yeem txuag tau 25% ntawm cov vuam thiab riveting workload. Nws feem ntau yog siv rau hauv cov tsev loj (xws li cov chaw tsim khoom, cov tsev siab siab, thiab lwm yam) uas yuav tsum tau muaj peev xwm cuam tshuam loj thiab muaj kev ruaj ntseg zoo, nrog rau cov txuas hniav, nkoj, nqa thiab tsheb thauj mus los, cov cuab yeej siv hauv paus, lub hauv paus, lub hauv paus. kab, etc.
Thaum ntxov li 1883, L. Seamen ntawm Tebchaws Meskas tau thov daim ntawv pov thawj rau lub tshuab dov rau dov H-beams. Hom dov zeb no siv thawj peb-cov menyuam ntu steel dov zeb thiab ntxiv ib daim ntawv qhia tshwj xeeb rau yob H-section steel nrog txoj kab nqes loj dua rau sab hauv ntawm lub flange. Qhov no yog qhov ntxov tshaj plaws dov H-beam. Nyob rau hauv 1902, lub teb chaws Yelemees tau tsim lub ntiaj teb thawj muaj H-beam dov zeb nrog rotating ntsug rollers thiab ib tug cais ntug-rolling kawg ncej. Qhov tshwm sim ntawm qhov dov zeb no tau tsim cov qauv ntawm H-beam dov zeb. Kev tsim kho ntawm universal dov zeb tuaj yeem muab faib ua 3 theem. Ua ntej xyoo 1950, nws yog thawj theem. Qhov thib ob theem yog los ntawm 1950 mus rau 1970, thaum universal dov mills tsim sai heev nyob rau hauv kom muaj nuj nqis. Txij li xyoo 1970, vim muaj kev vam meej ntawm kev siv tshuab computer hauv kev lag luam, cov txheej txheem dov thiab dov zeb qauv tau txhim kho ntxiv. Lub teb chaws thoob ntiaj teb tau tsim ntau yam tshiab universal dov mills. Kev tsim kho ntawm universal dov mills tau nkag mus rau theem thib peb, thiab tag nrho txuas ntxiv universal dov mills tau tshwm sim. Ntxiv rau dov H-zoo li tus hlau, kev siv universal dov mills tau nthuav dav ntau lawm ntau yam rau yob rails, channel steels, lub kaum sab xis steels, ca steels thiab steel piles, uas tau coj txog kev loj hlob nyob rau hauv seem steel ntau lawm technology.
Tuam Tshoj tus H-shaped steel ntau lawm pib nyob rau hauv 1970s. Lub sijhawm ntawd, me me ntawm H-shaped steel nrog lub vev xaib qhov siab ntawm 300mm tau tsim nyob rau hauv Baotou, Inner Mongolia, los ntawm kev siv cov kab hluav taws xob zoo tib yam rolling zeb thiab ntxiv ib txoj kab ntsug ntsug kom tau raws li qhov xav tau ceev. Tom qab ntawd, cov chaw tsim khoom hlau thiab cov chaw tsim choj hauv Wuhan, Shanghai, Tangshan, Baoji, Shanhaiguan thiab lwm qhov chaw tuaj yeem tsim cov welded H-beams. Tuam Tshoj tus thawj dov H-beam ntau lawm kab tau muab tso rau hauv Ma'anshan, Anhui nyob rau hauv 1991. Cov kab ntau lawm muaj ib txheej ntawm reversible universal ntug-dov kawg units thiab ib tug universal xov zeb. Txais tos ntev ntev txias thiab ntev ntev straightening txheej txheem. Raws li tus qauv tsim, beam-shaped H-shaped steel nrog lub web qhov siab tsawg dua 200mm thiab kem-shaped H-shaped steel nrog lub web qhov siab tsawg dua 150mm tuaj yeem tsim tau raws li cov qauv thoob ntiaj teb.
