Chitoliro chachitsulo chokazikirana, chotchedwanso chitoliro chowala, ndi chitoliro chachitsulo chopangidwa ndi mbale zachitsulo kapena zitsulo zikakhala kuti zigaweka. Kupanga chitoliro chachitsulo chokhala ndi kosavuta, kupanga mphamvu kwa kupanga ndizokwera, pali mitundu yambiri ndi kufotokozera, ndipo ndalama zake ndizochepa.
Kuyambira m'ma 1930s, chifukwa cha kukula kwamphamvu kopitilira kupanga zitsulo zapamwamba komanso kusintha kwaukadaulo, mtundu wa mawebusayiti akusintha mosalekeza, ndipo mitundu yosiyanasiyana yazitsulo yakwera, ndipo yasinthanitsa seam chitoliro. Chitoliro chachitsulo chotchedwa chimagawidwa kukhala chitoliro chowongoka ndi chitoliro chonyezimira molingana ndi mawonekedwe a weld.
Kupanga zitoliro zowongoka zowongoka ndizosavuta, zopanga zopanga ndizokwera, mtengo wake ndi wotsika, ndipo chitukuko chimathamanga. Mphamvu ya masitarashi ovekedwa nthawi zambiri imakhala yokwezeka kuposa iyo yowongoka yowongoka. Mapaipi ozunguliridwa ndi ma diameters ambiri amatha kupangidwa ndi ma billets onenepa. Mapaipi okometsetsa okhala ndi diameters amathanso kupangidwa ndi ma billets a m'lifupi. Komabe, poyerekeza ndi mapaipi owongoka mowongoka, kutalika kwa sembo kumachulukitsidwa ndi 30 mpaka 100%, ndipo kuthamanga kwake ndikotsika. Chifukwa chake, matumba ocheperako owala ndi owongoka kwambiri.
Post Nthawi: Disembala 16-2019