Cov kav dej thiab cov kav dej square yog cov kav hlau uas siv dav hauv kev tsim kho, tshuab, tsheb thauj mus los thiab lwm yam. Cov kab sib txuas ntawm cov kav dej puag ncig yog ncig, thiab cov duab sib dhos ntawm cov kav dej square yog square lossis duab plaub. Kev tsim cov txheej txheem ntawm cov raj puag ncig thiab cov raj square sib txawv, yog li lawv cov khoom khoov kuj txawv.
Kev sib piv ntawm dabtsi yog khoov kev ua tau zoo ntawm round tubes thiab square tubes:
1. Khoov vojvoog
Nyob rau hauv tib cov khoom thiab phab ntsa tuab, lub vojvoog dabtsi yog khoov ntawm lub voj voog puag ncig yog me dua li ntawm cov raj square. Qhov no yog vim hais tias tus ntoo khaub lig-sectional duab ntawm ib puag ncig lub raj yog ncig, thiab cov khoom geometric ntawm lub voj voog ua rau nws yooj yim rau kev hloov mus rau curves thaum khoov. Cov duab sib dhos ntawm lub raj square yog duab plaub. Thaum khoov, lub kaum sab hauv thiab sab nrauv yuav sib txawv, yog li ua kom lub vojvoog khoov.
2. Khoov muaj peev xwm
Round tubes muaj peev xwm khoov ntau dua li cov raj square. Qhov no yog vim hais tias tus ntoo khaub lig-section duab ntawm lub round yeeb nkab yog ncig thiab lub hauv paus axis yog symmetrical, yog li ntawd lub zog yog txawm thaum dabtsi yog khoov, thiab nws load-bearing muaj peev xwm kuj ruaj khov. Tus ntoo khaub lig-sectional duab ntawm lub raj square yog lub duab plaub thiab lub hauv paus axis yog asymmetrical. Nws yog ib qho yooj yim kom muaj cov hauv qab hauv qab thiab convex tops, uas tuaj yeem ua rau buckling thiab yas deformation thaum khoov, yog li txo nws cov bending load-bearing peev.
Muaj feem xyuam rau cov raj puag ncig thiab cov raj square:
Raws li kev soj ntsuam saum toj no, nws tuaj yeem pom tau tias cov raj puag ncig muaj qhov zoo hauv kev khoov kev ua haujlwm piv rau cov raj square. Yog li ntawd, cov kav dej puag ncig yog qhov tsim nyog rau kev siv nyob rau hauv cov xwm txheej uas khoov ntau zaus lossis qhov twg cov yeeb nkab txhawb nqa thiab kho yuav tsum tau ua. Square tubes tsim nyog rau lub sijhawm nrog kev ua haujlwm siab, torsion tsis kam, shear resistance thiab lwm yam yuav tsum tau ua. Piv txwv li, cov raj square yuav tsum tau siv nyob rau hauv qhov chaw xws li lub tsev thav duab, brackets, qhov rooj thiab qhov rais uas yuav tsum tau nqa cov loads thiab nws cov lus qhia tsis meej.
nyob rau hauv xaus:
Hauv cov ntsiab lus, muaj qhov sib txawv ntawm cov khoom khoov ntawm cov raj puag ncig thiab cov raj square. Txawm hais tias cov kav dej puag ncig muaj me me dabtsi yog khoov vojvoog thiab siab load-bearing muaj peev xwm, lawv yog ntau haum rau siv nyob rau hauv nkhaus luj tshib los yog qhov twg cov kav dej txhawb thiab ruaj; cov kav dej square yog tsim rau cov kabmob loads hauv ntau cov lus qhia thiab cov ntawv. Hauv kev siv cov tswv yim, cov ntaub ntawv tsim nyog yuav tsum raug xaiv raws li lawv cov yam ntxwv kom ntseeg tau tias qhov project zoo thiab kev nyab xeeb.
Tswv yim: ASTM A500 yog tus qauv specification rau txias-tsim welded thiab seamless carbon steel structural yeeb nkab nyob rau hauv round, square, thiab rectangular raj duab.
ASTM A500 steel yeeb nkab tuaj yeem siv rau hauv kev lag luam feem ntau. Zoo ductility. Nws muaj zoo dabtsi yog khoov, flatness, txiav, xuas nrig ntaus, flaring thiab flange zog, thiab tuaj yeem welded siv cov txheej txheem thiab kev coj ua.
