Amaphutha avamile nokuthi ungawavimbela kanjani?
Amaphutha avamile ekukhiqizweni kwediski yamabhuleki: imbobo yomoya, ukugoba kokuncipha, imbobo yesihlabathi, njll; I-graphite ephakathi nendawo kanye nohlobo esakhiweni se-metallographic idlula indinganiso, noma indinganiso yobuningi be-carbide; Ubulukhuni obukhulu kakhulu be-Brinell buholela ekucutshungulweni okunzima noma ebulukhunini obungalingani; Isakhiwo se-graphite siqinile, izakhiwo zemishini azikho ezingeni elijwayelekile, ubulukhuni abulungile ngemva kokucutshungulwa, futhi ukugoba okusobala ebusweni bokubumba nakho kwenzeka ngezikhathi ezithile.
1. Ukwakheka nokuvimbela imigodi yomoya: imigodi yomoya ingenye yeziphambeko ezivame kakhulu zokuthungwa kwediski yamabhuleki. Izingxenye zediski yamabhuleki zincane futhi zincane, isivinini sokupholisa nokuqina siyashesha, futhi mancane amathuba okuthi kube nemvula yemigodi yomoya kanye nemigodi yomoya ephendulayo. Ingaphakathi lesihlabathi se-fat oil binder likhiqiza igesi enkulu. Uma okuqukethwe komswakama wesikhunta kuphezulu, lezi zici ezimbili zivame ukuholela ezimbotsheni ezihlaselayo ekuthungweni. Kutholakale ukuthi uma okuqukethwe komswakama wesihlabathi sokubumba kudlula, izinga lokungcola kwe-porosity liyanda kakhulu; Kwezinye izindawo zokuthungwa kwesihlabathi esincane, ukuminyana (ama-choking pores) kanye nama-surface pores (shelling) kuvame ukuvela. Lapho kusetshenziswa indlela yebhokisi lebhokisi le-hot core elimbozwe nge-resin, ama-pores anzima kakhulu ngenxa yokukhiqizwa kwegesi okukhulu; Ngokuvamile, idiski lebhuleki elinomgogodla wesihlabathi ojiyile akuvamile ukuba neziphambeko zemigodi yomoya;
2. Ukwakheka kwembobo yomoya: igesi ekhiqizwa yi-disc sand core ye-brake disc casting ekushiseni okuphezulu izogeleza iphume noma ingene ngokuvundlile ngesikhala sesihlabathi esiyinhloko ngaphansi kwezimo ezijwayelekile. I-disc sand core iba mncane, indlela yegesi iba mncane futhi ukumelana kokugeleza kuyanda. Kwesinye isimo, lapho insimbi encibilikisiwe ifaka ngokushesha i-disc sand core, inani elikhulu legesi lizoqhuma; Noma insimbi encibilikisiwe eshisa kakhulu ithintane ne-sand mass enamanzi amaningi (ukuxubana kwesihlabathi okungalingani) endaweni ethile, okubangela ukuqhuma kwegesi, umlilo okrwitshwayo futhi kwakha ama-pores akrwitshwayo; Kwesinye isimo, igesi enomfutho ophezulu eyakhekile ihlasela insimbi encibilikisiwe bese intanta phezulu bese iphuma. Lapho isikhunta singakwazi ukuyikhipha ngesikhathi, igesi izosakazeka ibe ungqimba lwegesi phakathi kwensimbi encibilikisiwe kanye nobuso obuphansi besikhunta esingaphezulu, ithathe ingxenye yesikhala ebusweni obuphezulu bediski. Uma insimbi encibilikisiwe iqina, noma i-viscosity inkulu futhi ilahlekelwa uketshezi, isikhala esithathwe yigesi asikwazi ukugcwaliswa kabusha, Sizoshiya ama-pores angaphezulu. Ngokuvamile, uma igesi ekhiqizwa yi-core ingakwazi ukuntanta futhi iphume ngensimbi encibilikisiwe ngesikhathi, izohlala phezu kwengaphezulu lediski, ngezinye izikhathi ivezwe njengembobo eyodwa, ngezinye izikhathi ivezwe ngemva kokudubula ukuze kususwe isikali se-oxide, futhi ngezinye izikhathi itholakale ngemva komshini wokugaya, okuzobangela ukuchitha amahora okucubungula. Lapho i-brake disc core ijiyile, kuthatha isikhathi eside ukuthi insimbi encibilikisiwe ikhuphuke ngembobo yediski futhi icwilise i-disc core. Ngaphambi kokucwilisa, igesi ekhiqizwa yi-core inesikhathi esiningi sokugeleza ngokukhululeka endaweni ephezulu ye-core ngegebe lesihlabathi, futhi ukumelana nokugeleza ngaphandle noma ngaphakathi ohlangothini oluvundlile nakho kuncane. Ngakho-ke, amaphutha embobo ebusweni awavamile ukwakheka, kodwa ama-pores ahlukanisiwe ngamanye nawo angase avele. Okusho ukuthi, kukhona usayizi obalulekile wokwakha ama-pores aminyanisayo noma ama-pores ebusweni phakathi kobukhulu nobukhulu be-core yesihlabathi. Uma ubukhulu be-core yesihlabathi bungaphansi kwalolu sayizi obalulekile, kuzoba nokuthambekela okukhulu kwama-pores. Lobu bukhulu obubalulekile buyanda ngokwanda kobukhulu be-radial ye-brake disc kanye nokuncipha kwe-disc core. Izinga lokushisa liyisici esibalulekile esithinta ama-porosity. Insimbi encibilikisiwe ingena emgodini wesikhunta isuka ku-sprue yangaphakathi, idlula ingaphakathi eliphakathi lapho igcwalisa idiski, bese ihlangana ngokumelene ne-sprue yangaphakathi. Ngenxa yenqubo ende, izinga lokushisa liyancipha kakhulu, futhi i-viscosity iyanda ngokufanele, isikhathi esisebenzayo sokuba amabhamuza antante phezulu futhi akhiphe sifushane, futhi insimbi encibilikisiwe izoqina ngaphambi kokuba igesi ikhishwe ngokuphelele, ngakho-ke kulula ukwenzeka ama-pores. Ngakho-ke, isikhathi esisebenzayo sokuntanta nokukhipha amabhamuza singandiswa ngokwandisa izinga lokushisa lensimbi encibilikisiwe kudiski eliphambene ne-sprue yangaphakathi.
