Iyo yakajairika nzira yekugadzira yealuminium piston blanks ndiyo simbi mold gravity yekukanda nzira. Kunyanya, iyo yazvino simbi molds yatanga kugadziriswa neCNC muchina maturusi, ayo anogona kuve nechokwadi chepamusoro blank size kurongeka, kubereka kwakanyanya uye mutengo wakaderera. Kune yakaoma piston mhango, iyo simbi yesimbi inogona kukamurwa kuita matatu, zvishanu kana zvinomwe zvimedu kuti zviumbe, izvo zvakanyanya kuomarara uye kwete kusimba. Iyi nzira yekukanda giravhiti dzimwe nguva inoburitsa hurema hwakadai sekutsemuka kunopisa, pores, pinholes, uye kusunungura kwepiston isina chinhu.

Mune injini dzakasimbiswa, akaumbwa aluminium alloy pistons anogona kushandiswa, ane zviyo zvakanatswa, yakanaka simbi inoyerera kugovera, simba rakakwirira, yakanaka simbi chimiro uye yakanaka yekupisa conductivity. Saka tembiricha yepiston yakadzikira pane yegiravhiti yekukanda. Iyo piston ine yakakwira kureba uye kusimba kwakanaka, izvo zvinobatsira kudzikamisa kushushikana. Nekudaro, hypereutectic aruminiyamu-silicon alloys ine anopfuura 18% silicon haina kukodzera kuforoma nekuda kwebrittleness yavo, uye forging inokonzeresa yakakura kusarira kunetseka mupiston. Naizvozvo, maitiro ekugadzira, kunyanya tembiricha yekupedzisira yekubikira uye tembiricha yekupisa kupisa kunofanirwa kuve kwakakodzera, uye mizhinji yekutsemuka mupiston yakaumbwa panguva yekushandiswa kunokonzerwa nekusarira kunetseka. Forging ine zvinodiwa zvakasimba pachimiro chepiston chimiro uye mutengo wakakwira.

Iyo liquid die forging process yakatanga kushandiswa mukugadzira kutenderedza Hondo Yenyika Yechipiri, uye yakasimudzirwa nekushandiswa kune akasiyana madhigirii munyika dzakasiyana pasirese. Yakawana budiriro inokurumidza zvikuru mumakore gumi apfuura. nyika yangu yakatanga kushandisa maitiro aya muna 1958 uye ine nhoroondo yemakore makumi mana.

Liquid die forging ndeyekudira imwe chiyero chesimbi yemvura muforoma yesimbi, kudzvanya nechibhakera, kuitira kuti iyo simbi yemvura inozadza mhango nekumhanya kwakaderera kupfuura mukukanda kufa, uye kupenya uye kusimba pasi pekumanikidzwa kuwana dense. chimiro. Zvigadzirwa zvisina shrinkage mhango, shrinkage porosity uye humwe hurema hwekukanda. Iyi nzira ine zvese hunhu hwekukanda nekuforoma.