Iziphene eziqhelekileyo kunye nendlela yokukhusela?
Iziphene eziqhelekileyo kwimveliso ye-brake disc: umngxuma womoya, i-shrinkage porosity, umgodi wesihlabathi, njl;I-graphite ephakathi kunye nohlobo kwisakhiwo se-metallographic idlula umgangatho, okanye umgangatho wobungakanani be-carbide;Ubulukhuni beBrinell obuphezulu kakhulu bukhokelela ekuqhubeni nzima okanye ubunzima obungalinganiyo;Ulwakhiwo lwegraphite lurhabaxa, iipropathi zoomatshini azikho kumgangatho, uburhabaxa buba mbi emva kokulungiswa, kwaye i-porosity ebonakalayo kumphezulu wokuphosa nayo iyenzeka amaxesha ngamaxesha.
1. Ukuqulunqwa kunye nokuthintela imingxuma yomoya: imingxuma yomoya yenye yezona ziphene eziqhelekileyo ze-brake disc castings.Iindawo zediskhi zeBrake zincinci kwaye zincinci, ukupholisa kunye nesantya sokuqina kuyakhawuleza, kwaye akukho nto inokwenzeka yemingxuma yomoya yemvula kunye nemingxuma yomoya esebenzayo.I-fat oil binder sand core inesizukulwana esikhulu segesi.Ukuba ukufuma kokungunda kuphezulu, ezi zinto zimbini zihlala zikhokelela kwimibhobho ehlaselayo ekugalweni.Kufunyaniswa ukuba ukuba ukufuma kwesanti yokubumba kudlula, izinga le-porosity scrap landa kakhulu;Kweminye imida yesanti ecekethekileyo, ukuminxeka (imingxunya ekrwitshiweyo) kunye nemingxuma engaphezulu (iqokobhe) ikholisa ukuvela.Xa kusetyenziswa i-resin egqunywe isanti eshushu indlela yebhokisi yebhokisi isetyenziswa, i-pores ibaluleke kakhulu ngenxa yesizukulwana esikhulu segesi;Ngokubanzi, idiski yebhuleki enondoqo wesanti eshinyeneyo ayifane ibeneziphene zomngxunya womoya;
2. Ukuqulunqwa komngxuma womoya: igesi eyenziwa yi-disc yesanti ye-disc ye-brake disc cast kwiqondo lokushisa eliphezulu iya kuphuma ngaphandle okanye ngaphakathi ngokuthe tye kwi-gap engundoqo yesanti phantsi kweemeko eziqhelekileyo.I-disc ye-sand core iba yincinci, indlela yegesi iba yincinci kwaye ukuchasana nokuhamba kuyanda.Kwimeko enye, xa intsimbi etyhidiweyo idibanisa ngokukhawuleza i-disc ye-sand core, isixa esikhulu segesi siya kuqhuma;Okanye ubushushu obuphezulu bokudityaniswa kwentsimbi enyibilikisiweyo enobunzima besanti obuphezulu bamanzi (ukuxutywa kwesanti engalinganiyo) kwindawo ethile, okubangela ugqabhuko-dubulo lwerhasi, ukuminxa umlilo kunye nokwenza imingxuma emisiweyo;Kwelinye icala, irhasi eyenziwe ngoxinzelelo oluphezulu ihlasela intsimbi enyibilikisiweyo ize indada phezulu ibaleke.Xa isikhunta singenako ukuyikhupha ngexesha, igesi iya kusasazeka kwi-gas layer phakathi kwentsimbi etyhidiweyo kunye nomgangatho ophantsi we-mold top, ehlala inxalenye yendawo kwindawo ephezulu yediski.Ukuba intsimbi etyhidiweyo iyaqina, okanye i-viscosity inkulu kwaye ilahlekelwa yi-fluidity, indawo ehlala kuyo igesi ayinakuphinda ifakwe, Iya kushiya iipores ezingaphezulu.Ngokuqhelekileyo, ukuba igesi eveliswa ngumbindi ayinakudada kwaye ibaleke ngentsimbi etyhidiweyo ngexesha, iya kuhlala kwindawo ephezulu yediski, ngamanye amaxesha ibonakaliswe njengepore enye, ngamanye amaxesha ibonakaliswe emva kokudubula kokudubula ukususa isikali se-oxide, kwaye ngamanye amaxesha ifunyenwe emva komatshini, oya kubangela inkcitho yeeyure zokusebenza.Xa idiskhi yebrake core ijiyile, kuthatha ixesha elide ukuba intsimbi enyibilikisiweyo inyuke ngediskhi core kwaye intywilisele idiskhi core.Ngaphambi kokuntywila, igesi eveliswa ngumbindi inexesha elingakumbi lokuhamba ngokukhululekileyo kwindawo engaphezulu yondoqo ngokusebenzisa i-gap yesanti, kwaye ukuchasana nokugeleza ngaphandle okanye ngaphakathi kwinqanaba elithe tye kuncinci.Ke ngoko, iziphene zepore ezingaphezulu azifane zenziwe, kodwa iipores ezizimele zodwa zinokuthi zenzeke.Oko kukuthi, kukho ubungakanani obubalulekileyo bokwenza iipores ezikrwitshwayo okanye iindawo ezingaphezulu phakathi kobunzima kunye nobukhulu bombindi wesanti.Nje ukuba ubukhulu bombindi wesanti bungaphantsi kobu bukhulu bubalulekileyo, kuya kubakho ukuthambekela okunzulu kweepores.Lo mlinganiso obalulekileyo unyuka ngokunyuka kwe-radial dimension ye-brake disc kunye nokunciphisa i-disc core.Ubushushu yinto ebalulekileyo echaphazela i-porosity.Intsimbi etyhidiweyo ingena kumgodi wokubumba ukusuka kwi-sprue yangaphakathi, idlula umbindi ophakathi xa igcwalisa i-disc, kwaye idibana ngokuchasene ne-sprue yangaphakathi.Ngenxa yenkqubo ende, ubushushu buyancipha ngakumbi, kwaye i-viscosity iyanda ngokufanelekileyo, ixesha elisebenzayo lokuba amaqamza adada kwaye aphume, kwaye isinyithi esinyibilikisiweyo siya kuqina ngaphambi kokuba igesi ikhutshwe ngokupheleleyo, ngoko ke kulula ukuyifaka. kwenzeke.Ngoko ke, ixesha elisebenzayo le-bubble ejikelezayo kunye nokukhupha i-bubble inokwandiswa ngokunyusa ukushisa kwentsimbi etyhidiweyo kwi-disc ejongene ne-sprue yangaphakathi.
