Mapangidwe a Riser ndi gawo lofunikira kwambiri pakuponya, kuwonetsetsa kuti ma castings alibe zilema monga shrinkage cavities ndi porosity. Ma Risers, omwe amadziwikanso kuti odyetsa, amakhala ngati nkhokwe zazitsulo zosungunuka zomwe zimadyetsa kuponyera pamene zimalimba ndi mgwirizano.
Mapangidwe a Riser a Steel Castings
In chuma chamtengo wapatali, cholinga chachikulu cha mapangidwe okwera ndi kuonetsetsa kuti zitsulo zosungunuka zimadyetsedwa mokwanira kuti zipereke malipiro a volumetric shrinkage panthawi yolimba. Chitsulo chimakonda kukhala ndi mitengo yocheperako kwambiri, zomwe zimapangitsa kuti mapangidwe ake okwera akhale ovuta.
Kwa castings zitsulo, mitundu iwiri ikuluikulu ya risers amagwiritsidwa ntchito:okwera otseguka ndiokwera akhungu. Zokwera zotseguka zimawonekera mumlengalenga, pomwe zokwera zakhungu zimatsekeredwa mkati mwa nkhungu. Zokwera zakhungu zimakhala zogwira mtima kwambiri pochepetsa kutaya kutentha.
Zokwera ziyenera kukhala pazigawo zolemera kwambiri za kuponyera komwe kungathe kuchitika. Kukula ndi mawonekedwe a chokwera ziyenera kupangidwa kuti zitsimikizire kuchuluka kokwanira kwachitsulo chosungunuka. Ma cylindrical risers amagwiritsidwa ntchito kwambiri kuti achotsedwe mosavuta komanso kuti azitha kudya bwino. Manja otsekereza ndi zida za exothermic nthawi zambiri amagwiritsidwa ntchito kusunga kutentha kwa chokwera, kuwonetsetsa kuti chimakhala chosungunula nthawi yayitali kuposa kuponyera.
Mapangidwe a Riser a Iron Castings
Zachuma chamtengo wapatali, makamaka imvi ndi ductile iron, cholinga chake ndikuwongolera mawonekedwe okulitsa panthawi yolimba. Mosiyana ndi chitsulo, mitundu ina yachitsulo imakula panthawi yomaliza ya kulimba, kuchepetsa kufunika kokwera kwakukulu.
Zokwera zakhungu amasankhidwa popanga chitsulo chifukwa chogwira ntchito bwino. Kwa chitsulo cha ductile, zokwera zing'onozing'ono zimatha kukhala zokwanira chifukwa cha kukula kwa graphite panthawi yolimba.
Zing'onozing'ono, zokwera zowonjezera zingagwiritsidwe ntchito popanga chitsulo. Maonekedwe ake amatha kusiyanasiyana koma akuyenera kuchepetsa malo omwe amawonongeka ndi kutentha kwinaku akukulitsa bwino kudyetsa. Kuzizira (zinthu zomwe zimayamwa kutentha) nthawi zina zimagwiritsidwa ntchito molumikizana ndi zokwera kuti ziwongolere kuziziritsa komanso kulimbikitsa kulimba kolunjika ku chokwera.
Mapangidwe a Riser a Non-ferrousAloyi Castings
Zosakaniza zopanda chitsulo, monga aluminiyamu ndi zosakaniza zamkuwa, zimakhala ndi machitidwe olimba osiyanasiyana poyerekeza ndi zitsulo zachitsulo. Cholinga chachikulu ndikupewa zolakwika monga shrinkage porosity ndikuwonetsetsa kuti nkhunguyo yadzaza.
Kwa ma castings opanda ferrous, onse otseguka ndi akhungu okwera amagwiritsidwa ntchito, kutengera aloyi ndi mapangidwe oponya. Zokwera zotseguka zimakhala zofala kwambiri popanga zing'onozing'ono, pomwe zokwera zakhungu zimagwiritsidwa ntchito popanga zazikulu.
Zosakaniza zopanda chitsulo nthawi zambiri zimafuna kuti zokwera zikhazikike pamalo apamwamba kwambiri poponya kuti agwiritse ntchito mphamvu yokoka.
Kukula kwa chokwera kuyenera kuwerengera kuchuluka kwa kachulukidwe kocheperako komanso kutsika kwakukulu kwa ma aloyi opanda ferrous. Zokwera zokhala ndi tepi kapena khosi zingathandize kuchepetsa kutentha komanso kuwongolera bwino chakudya. Insulation ndiyofunikira pazitsulo zopanda chitsulo, chifukwa nthawi zambiri zimalimba pakatentha kwambiri. Zida za exothermic ndi manja otsekereza zimatha kuthandizira kusungunuka kwa chokwera kwa nthawi yayitali.
Nthawi yotumiza: Dec-20-2024