Riser dhizaini chinhu chakakosha chemaitiro ekukanda, kuve nechokwadi chekuti makanda haana hurema hwakadai se shrinkage cavities uye porosity. Risers, inozivikanwawo semafidhi, inoshanda sematura esimbi yakanyungudutswa inodyisa kukanda sezvainoomesa uye zvibvumirano.
Riser Dhizaini yeSimbi Castings
In simbi yekukandira mari, chinangwa chikuru chekugadzira dhizaini ndechekuona kudya kwakakwana kwesimbi yakanyungudutswa kubhadhara volumetric shrinkage panguva yekusimba. Simbi inoita kunge ine yakakwira shrinkage mazinga, zvichiita kuti dhizaini inosimuka yakakosha.
Kune simbi castings, maviri makuru marudzi e risers anoshandiswa:open risers uyemapofu anosimuka. Zvikwiriso zvakavhurika zvinoratidzwa kumhepo, nepo zvikwiriso zvisingaoni zvakavharirwa mukati me mold. Mapofu anosimuka anowedzera kushanda mukuderedza kurasikirwa kwekupisa.
Makwikwi anofanirwa kunge ari pazvikamu zvinorema zvekukanda uko kudikidiki kunonyanya kuitika. Hukuru uye maumbirwo emubato unokwidza zvinofanirwa kugadzirwa kuti ive nechokwadi chehuwandu hwakakwana hwesimbi yakanyungudutswa. Cylindrical risers inowanzoshandiswa kuitira nyore kubvisa uye kushanda mukudyisa. Insulating sleeve uye exothermic zvinhu zvinowanzo shandiswa kuchengetedza tembiricha yekusimuka, kuve nechokwadi kuti inoramba yakanyungudutswa kwenguva yakareba kupfuura yekukanda.
Riser Dhizaini yeIron Castings
Foriron investment castings, kunyanya grey uye ductile iron, chinangwa ndechekugadzirisa maitiro ekuwedzera panguva yekusimba. Kusiyana nesimbi, mamwe marudzi esimbi anowedzera panguva dzekupedzisira kusimba, zvichideredza kudiwa kwekusimuka kukuru.
Mapofu anosimuka vanosarudzwa nokuda kwesimbi yekukanda nekuda kwekushanda kwavo. Kune ductile iron, zvikwiriso zvidiki zvinowanzokwana nekuda kwekuwedzera kwegraphite panguva yekusimba.
Madiki, akawedzera compact risers anogona kushandiswa kukanda simbi. Chimiro chinogona kusiyanisa asi chinofanirwa kudzikisa nzvimbo yepasi yakazarurwa nekurasikirwa nekupisa uku uchiwedzera kugona kwekudya. Kutonhorwa (zvinhu zvinotora kupisa) dzimwe nguva zvinoshandiswa pamwe chete nezvikwiriso kudzora kutonhora uye kukurudzira kusimba kwekwakananga kunosimudzwa.
Riser Dhizaini Yeisina-FerrousAlloy Castings
Asina-ferrous alloys, akadai searuminiyamu nemhangura alloys, ane maitiro ekusimba akasiyana kana achienzaniswa nesimbi. Chinangwa chekutanga ndechekudzivirira kuremara senge shrinkage porosity uye kuve nechokwadi chekuzadzwa kwakazara kwe mold.
Kune asiri-ferrous castings, zvese zvakavhurika uye mapofu risers anoshandiswa, zvichienderana nealloy uye dhizaini yekukanda. Makwikwi akavhurika anowanzo kukanda madiki, nepo mapofu anosimuka achishandiswa pakukandira hombe.
Non-ferrous alloys anowanzoda kuti zvikwiriso zviiswe panzvimbo dzepamusoro dzekukanda kushandisa simba rinokwevera zvinhu pasi.
Saizi yekusimuka inoda kuverengera kuderera kwe density uye yakakwirira shrinkage rates yeasina-ferrous alloys. Tapered kana mitsipa inosimuka inogona kubatsira mukuderedza kupisa kwekupisa uye kunatsiridza kugona kwekudya. Insulation yakakosha kune asiri-ferrous alloys, sezvo achiwanzo kusimba pakudzika kwakadzika. Exothermic zvinhu uye maoko ekudzivirira anogona kubatsira kuchengetedza yakanyunguduka yekusimuka kwenguva yakareba.
Nguva yekutumira: Zvita-20-2024