Tsanangudzo
Investment casting, inozivikanwawo sekukanda wakisi yakarasika kana kukanda chaiko, inzira chaiyo yekukanda ine zvishoma uye isina kucheka. Zvishandiso zvekuumba mari (zvinowanzo dzika zvakanyungudika zvakaita senamo) zvinoshandiswa kugadzira sampuli dzekudyara uye kugadzira module. Zvadaro pendi (refractory material) inoshandiswa pamusoro peiyo module. Mushure mekuoma uye kuomeswa, moduru inopisa kuti inyungudutse zvinhu zvekuumba. Gomba rakadzika rinoumbwa, uye simbi yesimbi inodururwa mukati mayo mushure mekupisa kwekupisa, uye kukanda kunowanikwa mushure mekuchenesa.
Hunhu hwekuisa mari
1.Castings ane high dimensional accuracy (CT4-CT7); yakaderera pamusoro roughness (Ra1.6-6.3um). Iyo yekucheka mvumo yekukanda yakaderedzwa, uye pedyo-net-shape casting inogona kuwanikwa.
2.Kukwanisa kugadzira matete-walled castings ane maumbirwo akaoma. Zvakadai semugamuchiri wepamberi (akaumbwa nemhete dzemukati nekunze uye 14 blades). Semuenzaniso, mashizha einjini ane hushoma hwemadziro ukobvu hwe 0.7mm.
3.Alloy zvinhu hazvibvumirwi. Simbi, mhangura, aruminiyamu, titanium, magnesium, etc. Nickel-based high-temperature alloys ane high melting points, low melting point metals dzakadai se zinc ne tin.
4.Investment casting ine zvimwe zvisingakwanisi. Maitiro acho anorema, kutenderera kwekugadzira kwakareba, uye saizi yekukanda haifanirwe kunge yakakura.
Process flow
1.Kugadzira uye kugadzira kuumba.
Mold yakashandiswa kugadzira wakisi inonzi stamper. Zvinotarisirwa kuve nehupamhi hwepamusoro uye kupera kwepamusoro. Yakagadzirwa nealuminium alloy, simbi, fusible alloy, plaster kana plastiki zvinhu zvinoenderana nebatch yekugadzira.
2.Ita mapatani ewakisi.
Zvinhu zvewax mold zvinowanzogadzirwa ne50% parafini uye 50% stearic acid. Mushure mekunyunguduka, shandisa wakisi yekutsikirira wakisi muforoma. Mushure mekuoma, bvisa uye uise mumvura inotonhora kuti utonhorere pasi kudzivirira deformation. Iyo sprue mold inowanzo gadzirwa nedanda redanda kana simbi yealuminium yakanyikwa mudeko rewakisi 2-3mm, uye ipapo mapatani ewakisi anobatanidzwa kune sprue mold nemagetsi ekudziya banga kugadzira module.
3.Kugadzira Shell.
Nyura iyo module mujira rakagadzirwa nequartz poda uye girazi remvura (kana silica sol), tora kunze, urisase nejecha requartz, wobva waiisa muhardener (inowanzo shandiswa ammonium chloride kana aluminium chloride) mhinduro yekuomesa kuita Layer makungu uye dzokorora maitiro ari pamusoro apa kusvika kukora kwegoko re5-10 mm.
4.Dewaxing uye kugocha.
Isa goko rakaumbwa mutangi remvura inopisa iri pa95-100℃ kunyungudutsa mold yewakisi nekuyangarara kunze. Wobva wabika iyo mold shell pa800-900 ℃ (yemvura girazi mold shell) kuwedzera simba uye kubvisa mold shell. Kunyorova, kusara wakisi, saponification, nezvimwe.
5.Kudurura uye kuchenesa.
Iyo mold shell inopfurwa inowanzodirwa ichipisa mushure mekuburitswa muchoto kuitira kuti ibudise matete-walled castings. Mushure mekunge kukanda kwatonhodzwa, paradza goko rekuumbwa, bvisa kukanda uye kucheka kudira uye riser system, uye wozoita yekukanda post-processing process, ndiko kuti, shandisa sandblasting, kupfura kuputika, alkali kufashaira uye electrochemical nzira dzekuchenesa kubvisa yakasara goko uye anamira pamusoro uye mukati megomba rekukanda. Jecha, chloride, nezvimwewo zvinobviswa kuti vawane castings ine yakatsetseka.
