Amaphutha avamile nendlela yokuwavimbela?
Ukukhubazeka okuvamile ekukhiqizeni i-brake disc: imbobo yomoya, i-shrinkage porosity, umgodi wesihlabathi, njll; I-graphite ephakathi nendawo esakhiweni se-metallographic idlula izinga, noma indinganiso yobuningi be-carbide; Ubulukhuni beBrinell obuphakeme kakhulu buholela ekucubunguleni okunzima noma ubulukhuni obungalingani; Isakhiwo se-graphite simahhadlahhadla, izakhiwo zemishini azikho ezingeni elifanele, ukuhwaqeka kubi ngemva kokucubungula, futhi i-porosity esobala endaweni yokuphonsa nayo iyenzeka ngezikhathi ezithile.
1. Ukwakhiwa nokuvimbela izimbobo zomoya: imigodi yomoya ingenye yezinkinga ezivame kakhulu ze-brake disc castings. Izingxenye zama-brake disc zincane futhi zizacile, isivinini sokupholisa kanye nokuqiniswa siyashesha, futhi mancane amathuba okuba nezimbobo zomoya ezina imvula nezimbobo zomoya ezisebenzayo. I-fat oil binder sand core inesizukulwane esikhulu segesi. Uma umswakama wesikhunta uphezulu, lezi zici ezimbili zivame ukuholela ezimbotsheni ezihlaselayo ekubunjweni. Kutholakala ukuthi uma umswakama wesihlabathi sokubumba udlula, izinga le-porosity scrap landa kakhulu; Kwezinye izimbotshana ezincane zesihlabathi, ukuminyanisa (izimbotshana eziminyanisayo) kanye nezimbotshana ezingaphezulu (amagobolondo) kuvame ukuvela. Lapho kusetshenziswa indlela yebhokisi le-resin ehlanganiswe nesihlabathi esishisayo, izimbotshana zibucayi kakhulu ngenxa yesizukulwane esikhulu segesi; Ngokuvamile, i-brake disc ene-sand core ewugqinsi ayivamisile ukuba namaphutha embobo yomoya;
2. Ukwakhiwa kwembobo yomoya: igesi ekhiqizwe i-disc sand core ye-brake disc cast ekushiseni okuphezulu izogeleza iye ngaphandle noma ngaphakathi ngokuvundlile ngegebe lesihlabathi eliwumgogodla ngaphansi kwezimo ezivamile. I-disc sand core iba mncane, indlela yegesi iba mncane futhi ukumelana nokugeleza kuyanda. Kwesinye isikhathi, lapho insimbi encibilikisiwe ifaka ngokushesha i-disc sand core, inani elikhulu legesi lizoqhuma; Noma izinga lokushisa eliphezulu okuthinta insimbi encibilikisiwe enomthamo wesanti wamanzi amaningi (ukuxutshwa kwesihlabathi okungalingani) endaweni ethile, okubangela ukuqhuma kwegesi, ukuminyanisa umlilo nokwenza izimbotshana eziminyanisayo; Kwesinye isigameko, igesi yomfutho ophezulu eyakhiwe ihlasela insimbi encibilikisiwe intante iye phezulu ibaleke. Lapho isikhunta singakwazi ukusikhipha ngesikhathi, igesi izosabalala ibe ungqimba lwegesi phakathi kwensimbi encibilikisiwe kanye nendawo engezansi yesikhunta esiphezulu, ethatha ingxenye yesikhala endaweni engaphezulu yediski. Uma insimbi encibilikisiwe iqina, noma i-viscosity inkulu futhi ilahlekelwa uketshezi, indawo ehlala igesi ayikwazi ukugcwaliswa kabusha, Izoshiya izimbotshana ezingaphezulu. Ngokuvamile, uma igesi ekhiqizwe indikimba ingakwazi ukuntanta phezulu futhi ibaleke ngensimbi encibilikisiwe ngesikhathi, izohlala phezu kwendawo engaphezulu yediski, ngezinye izikhathi ibe sobala njengembotshana eyodwa, ngezinye izikhathi ivele ivezwe ngemva kokuqhuma kokudubula ukuze kususwe isikali se-oxide, futhi ngezinye izikhathi itholakala ngemva komshini, okuzodala ukumosheka kwamahora okucubungula. Uma i-brake disc core iwugqinsi, kuthatha isikhathi eside ukuthi insimbi encibilikisiwe ikhuphuke phakathi kwe-disc core futhi icwilise umgogodla wediski. Ngaphambi kokucwiliswa emanzini, igesi elikhiqizwe umgogodla linesikhathi esengeziwe sokugeleza ngokukhululekile endaweni engaphezulu yengqikithi ngokusebenzisa igebe lesihlabathi, futhi ukumelana nokugeleza ngaphandle noma ngaphakathi endaweni evundlile nakho kuncane. Ngakho-ke, ukukhubazeka kwe-pore ebusweni akuvamile ukwakheka, kodwa izimbotshana ezizimele zodwa zingase zenzeke. Okusho ukuthi, kunosayizi obalulekile wokwakha ama-pores okuminyanisa noma ama-pores angaphezulu phakathi kokuqina nokuqina komgogodla wesihlabathi. Uma ubukhulu bomgogodla wesihlabathi bungaphansi kwalesi sisayizi esibucayi, kuzoba nokuthambekela okungathi sína kwezimbotshana. Lobu bukhulu obubalulekile bukhula ngokukhula kobukhulu be-radial be-brake disc kanye nokuncipha kwe-disc core. Izinga lokushisa liyisici esibalulekile esithinta i-porosity. Insimbi encibilikisiwe ingena emgodini wesikhunta isuka ku-sprue yangaphakathi, idlule inkaba ephakathi lapho igcwalisa i-disc, futhi ihlangana ngokuphambene ne-sprue yangaphakathi. Ngenxa yenqubo ende, izinga lokushisa liyehla kakhulu, futhi i-viscosity iyanda ngokufanele, isikhathi esisebenzayo sokuthi amabhamuza antante futhi aphume sifushane, futhi insimbi encibilikisiwe izoqina ngaphambi kokuba igesi ikhishwe ngokuphelele, ngakho-ke kulula ukuvala ama-pores. zenzeka. Ngakho-ke, isikhathi esisebenzayo sokuntanta kwe-bubble nokukhipha singanwetshwa ngokwandisa izinga lokushisa lensimbi encibilikisiwe ku-disc ebhekene ne-sprue yangaphakathi.
