Nthawi yogwira ya aluminiyumu extruded profiles makamaka zimatsimikiziridwa ndi kulimba kwa njira yothetsera gawo lolimbikitsidwa. Njira yolimba yothetsera gawo lolimbikitsidwa imakhudzana ndi kutentha kwa kutentha, chikhalidwe cha aloyi, dziko, kukula kwa gawo la aluminiyamu, kutentha, sing'anga ndi kuchuluka kwa ng'anjo yotsegula.
Pamene ambiri kuzimitsa kutentha kutentha kutsatiridwa malire chapamwamba, atagwira nthawi ya zotayidwa ndi lofanana lalifupi; Pambuyo pa kutentha kwapamwamba kwambiri, digiri ya deformation ndi yayikulu, nthawi yogwira ndi yochepa. Kwa mbiri ya aluminiyamu yomwe idakonzedweratu, chifukwa gawo lolimbikitsa limayenda pang'onopang'ono komanso mokulirapo, kusungunuka kwa gawo lolimbikitsa kumakhala pang'onopang'ono, kotero kuti nthawi yogwira imakhala yayitali.
Nthawi yokhala ndi mbiri ya aluminiyamu yotenthedwa mu mpweya wotentha ndi yosiyana kwambiri ndi yosambira yamchere, ndipo nthawi yotentha m'madzi amchere ndi yochepa kwambiri. Ambiri mafakitale zotayidwa mbiri kapena mipiringidzo ntchito ofukula mpweya quenching ng'anjo, ndi atagwira nthawi masamu pamene zitsulo pamwamba kutentha kapena ng'anjo kutentha kufika malire apansi a quenching kutentha. Gome 1 limatchula nthawi yotenthetsera ndi kusunga mbiri ya aluminiyamu ndi mipiringidzo yamitundu yosiyanasiyana mung'anjo yozimitsa mpweya.
Gulu 2 likuwonetsa nthawi yotenthetsera ndikugwira mapaipi okhala ndi makulidwe osiyanasiyana a khoma mung'anjo yozimitsa mpweya. Kugwira nthawi yozimitsa kutentha kuyenera kuonetsetsa kuti gawo lolimbikitsa litha kusungunuka kwathunthu kuti apeze mphamvu yowonjezera yowonjezera, koma nthawi yotentha sikuyenera kukhala yaitali kwambiri, nthawi zina, idzachepetsa ntchito ya mbiriyo.
Zambiri zama aluminiyamu otenthetsera mafakitole monga 2A12, 7A04 ndi ma profiles ena olimba kwambiri sangathe kuzimitsidwa mumlengalenga ngati ma aluminium omanga monga 6063 alloy, ndiko kuti, kuzizira pang'ono kumatha kuletsa kugwa kwa magawo olimbikitsa. Iwo amachotsedwa mu ng'anjo yozimitsa moto, amasamutsidwa ku thanki yozimitsa madzi, ndipo atakhazikika mumlengalenga kwa masekondi pang'ono, padzakhala mpweya wolimbitsa magawo, zomwe zidzakhudza kulimbikitsa. Table 3 imatchula zotsatira za nthawi zosiyanasiyana zosinthira za 7A04 alloy pamakina atatha kuzimitsa.
(Table 3 - 7A04 alloy quenching transfer time effect pa makina a aluminiyamu mbiri)
Choncho, nthawi yozimitsira kutengerapo ndi imodzi mwazinthu zomwe ziyenera kufotokozedwa pozimitsa mbiri ya aluminiyamu, ndiko kuti, kusamutsidwa kwa mbiri ya aluminiyamu kuchokera ku ng'anjo yozimitsira moto kupita ku sing'anga yozimitsira kuyenera kutsirizidwa mkati mwa nthawi yeniyeni yosinthira, yomwe imatchedwa nthawi yovomerezeka yovomerezeka kapena nthawi yochedwa kuchepetsa. Nthawiyi ikugwirizana ndi kapangidwe ka aloyi, mawonekedwe a mbiriyo, komanso kuchuluka kwa makina ogwiritsira ntchito zida. Ngati zinthu ziloleza, kufupikitsa nthawi yozimitsa yozimitsa, kumakhala bwino. Malamulo oyendetsera ntchito: nthawi yotengera mbiri yaying'ono sayenera kupitirira 20s, zazikulu kapena mtanda kuzimitsidwa mbiri aluminiyamu sayenera upambana 40s; pazambiri zolimba kwambiri monga 7A04, nthawi yosinthira sayenera kupitilira 15s.
Adasinthidwa ndi May Jiang kuchokera ku MAT Aluminium
Nthawi yotumiza: Oct-21-2023
