Iziphene eziqhelekileyo kunye nendlela yokuzithintela?
Iziphene eziqhelekileyo kwimveliso yediski yeebhuleki: umngxuma womoya, ukuxinana kwe-shrinkage, umngxuma wesanti, njl.njl.; I-graphite ephakathi kunye nohlobo kwisakhiwo se-metallographic idlula umgangatho, okanye umgangatho wobungakanani be-carbide; Ubulukhuni obuphezulu kakhulu beBrinell bukhokelela ekucutshungulweni okunzima okanye ubunzima obungalinganiyo; Isakhiwo segrafiti sirhabaxa, iipropati zoomatshini azikho kumgangatho oqhelekileyo, uburhabaxa abulunganga emva kokucubungula, kwaye ukuxinana okucacileyo kumphezulu wokuphosa kwenzeka ngamanye amaxesha.
1. Ukwakheka nokuthintela imingxuma yomoya: imingxuma yomoya yenye yezona ziphene zixhaphakileyo kwi-brake disc castings. Iindawo ze-brake disc zincinci kwaye zincinci, isantya sokuphola kunye nokuqina sikhawuleza, kwaye akukho mathuba mancinci emingxuma yomoya kunye nemingxuma yomoya esebenzayo. I-fat oil binder sand core ine-gas generation enkulu. Ukuba umxholo womswakama we-mold uphezulu, ezi zinto zimbini zihlala zikhokelela kwimingxuma ehlaselayo kwi-casting. Kufunyaniswe ukuba ukuba umxholo womswakama we-molding sand udlula, izinga le-porosity scrap liyanda kakhulu; Kwezinye ii-braking ze-sand core ezincinci, i-choking (i-choking pores) kunye ne-surface pores (shelling) zihlala zivela. Xa kusetyenziswa indlela ye-resin coated sand hot core box, ii-pores zimbi kakhulu ngenxa ye-gas generation enkulu; Ngokubanzi, i-brake disc ene-sand core etyebileyo ayisoloko ine-air hole disfects;
2. Ukwenziwa komngxuma womoya: igesi eveliswa yi-disc sand core yebrake disc casting kubushushu obuphezulu iya kuphuma okanye ihambe ngokuthe tye ngesithuba sesanti esingundoqo phantsi kweemeko eziqhelekileyo. I-disc sand core iyancipha, indlela yegesi iyancipha kwaye ukumelana nokuhamba kwamanzi kuyanda. Kwimeko enye, xa intsimbi enyibilikisiweyo ingena ngokukhawuleza kwi-disc sand core, inani elikhulu legesi liya kuqhuma; Okanye intsimbi enyibilikisiweyo eshushu kakhulu idibana nobunzima besanti obuphezulu (ukuxubana kwesanti okungalinganiyo) kwindawo ethile, okubangela ukuqhuma kwegesi, ukuminyanisa umlilo nokwenza ii-crying pores; Kwimeko enye, igesi enoxinzelelo oluphezulu eyenziweyo ihlasela intsimbi enyibilikisiweyo kwaye intante phezulu ize iphume. Xa i-mold ingakwazi ukuyikhupha ngexesha, igesi iya kusasazeka ibe ngumaleko wegesi phakathi kwentsimbi enyibilikisiweyo kunye nomphezulu ongezantsi we-mold ephezulu, ithathe indawo yendawo engaphezulu kwe-disc. Ukuba i-iron enyibilikisiweyo iyaqina, okanye i-viscosity inkulu kwaye ilahlekelwa bulwelo, indawo ehlala igesi ayinakuzaliswa, Iya kushiya ii-surface pores. Ngokubanzi, ukuba igesi eveliswa yi-core ayikwazi ukudada phezulu ize iphume ngentsimbi enyibilikisiweyo ngexesha, iya kuhlala kumphezulu ophezulu wediski, ngamanye amaxesha ivezwe njengembobo enye, ngamanye amaxesha ivezwe emva kokudutyulwa ukuze kususwe isikali se-oxide, kwaye ngamanye amaxesha ifunyenwe emva kokwenziwa, nto leyo eya kubangela ukuchitha iiyure zokucubungula. Xa i-brake disc core ityebile, kuthatha ixesha elide ukuba i-metallic inyuke nge-disc core ize ifake i-disc core. Ngaphambi kokuntywiliselwa, igesi eveliswa yi-core inexesha elingakumbi lokuhamba ngokukhululekileyo ukuya kumphezulu ophezulu we-core ngesithuba sesanti, kwaye ukumelana nokuphuma ngaphandle okanye ngaphakathi kwicala elithe tye nako kuncinci. Ke ngoko, iziphene ze-surface pore azenzeki rhoqo, kodwa ii-pores ezizimeleyo nazo zinokuvela. Oko kukuthi, kukho ubungakanani obubalulekileyo bokwenza ii-pores ezikrwitshwayo okanye ii-surface pores phakathi kobukhulu kunye nobukhulu be-santi core. Nje ukuba ubukhulu be-santi core bungaphantsi kobu bukhulu bubalulekileyo, kuya kubakho ukuthambekela okukhulu kwee-pores. Olu bukhulu bubalulekileyo luyanda ngokunyuka kobukhulu be-radial ye-brake disc kunye nokuncitshiswa kwe-disc core. Ubushushu yinto ebalulekileyo echaphazela i-porosity. Isinyithi esinyibilikisiweyo singena kwindawo yokubumba sisuka kwi-sprue yangaphakathi, sidlule embindini ophakathi xa sigcwalisa idiski, size sidibane nxamnye ne-sprue yangaphakathi. Ngenxa yenkqubo ende, ubushushu buyehla ngakumbi, kwaye i-viscosity iyanda ngokufanelekileyo, ixesha elifanelekileyo lokuba amaqamza antante phezulu aze akhuphe lifutshane, kwaye isinyithi esinyibilikisiweyo siya kuqina ngaphambi kokuba igesi ikhutshwe ngokupheleleyo, ngoko ke kulula ukuba kubekho ii-pores. Ke ngoko, ixesha elifanelekileyo lokuntanta nokukhutshelwa kweqamza linokwandiswa ngokunyusa ubushushu besinyithi esinyibilikisiweyo kwidiski echasene ne-sprue yangaphakathi.
