Mumamiriro ezvinhu akajairika, kurongeka kwedimensional yekukanda kwakanyatso kukanganiswa nezvinhu zvakawanda zvakadai sekukanda maitiro, kukanda zvinhu, kugadzira mold, kugadzira shell, kubika, kudurura, nezvimwewo. Chero kugadzika kana kushanda kusina musoro kwechibatanidza chero chipi zvacho chichashandura shrinkage rate ye casting.Izvi zvinotungamira mukutsauswa mukurongeka kwedimensional yekukanda kubva kune zvinodiwa.Izvi zvinotevera zvinhu zvinogona kukonzera kukanganisa mukurongeka kwedimensional yekukandwa chaiko:
(1) Pesvedzero yemaitiro ekukanda: a.Kukanda madziro ukobvu, yakakura shrinkage rate, nhete yekukanda madziro, diki shrinkage rate.b.Iyo yemahara shrinkage rate yakakura, uye iyo inodziviswa shrinkage mwero idiki.
(2) Pesvedzero yechinhu chekukandira: a.Iyo yakakwira iyo kabhoni yemukati mune izvo, iyo diki iyo mutsara shrinkage mwero, uye yakadzikira iyo kabhoni yemukati, yakakura mutsara shrinkage mwero.b.Iyo yekukanda shrinkage rate yezvinhu zvakajairika ndeiyi: kukanda shrinkage rate K=(LM-LJ)/LJ×100%, LM ndiyo saizi yegomba, uye LJ ndiyo saizi yekukanda.K inobatwa nezvinhu zvinotevera: wax mold K1, casting structure K2, alloy type K3, kudira tembiricha K4.
(3) Pesvedzero yekugadzira mold pane mutsara shrinkage mwero wekukanda: a.Kurudziro yetembiricha yejekiseni rewakisi, kudzvanywa kwejekiseni rewakisi, uye kumanikidza kubata nguva pahukuru hwekudyara ndiyo inonyanya kuoneka mukupisa kwejekiseni rewakisi, inoteverwa nekudzvanywa kwejekiseni rewakisi, uye nguva yekumanikidza inovimbiswa Mushure mekudyara kwagadzirwa, iyo. ine zvishoma pakukura kwekupedzisira kwekudyara.b.The linear shrinkage rate of wax (mold) material inenge 0.9-1.1%.c.Kana iyo mold yekudyara ichichengetwa, pachava nekumwe kuderera, uye kukosha kwayo kwe shrinkage inenge 10% yehupamhi hwese, asi kana yakachengetwa kwemaawa gumi nemaviri, saizi yekudyara yakagadzikana.d.Radial shrinkage rate yewakisi mold ingori 30-40% yehurefu hwekuderera.Tembiricha yejekiseni rewakisi ine simba rakakura kwazvo pakukura kwemahara pane kuderera kwemazinga (tembiricha yakanakisa yemajekiseni i57-59 ℃, Kukwirisa tembiricha, ndiko kukura kuderera).
(4) Pesvedzero yezvigadzirwa zvekugadzira goko: jecha zircon, zircon powder, Shangdian jecha uye Shangdian poda inoshandiswa.Nekuda kweiyo diki yekuwedzera coefficient, chete 4.6 × 10-6 / ℃, ivo vanogona kufuratirwa.
(5) Mhedzisiro yekubheka goko: Nekuti iyo yekuwedzera coefficient yegoko idiki, kana tembiricha yegoko iri 1150 ℃, inongova 0.053%, saka inogona kufuratirwa.
(6) Mhedzisiro yetembiricha yekukanda: kukwirisa tembiricha yekukanda, kuwedzera kuderera kwechiyero, uye kudzikira kwetembiricha yekukanda, kudiki kuderera, saka tembiricha yekukanda inofanira kunge yakakodzera.
Nguva yekutumira: Nov-15-2021