Ngaphantsi kweemeko eziqhelekileyo, ukuchaneka kwe-dimensional ye-precision castings kuchatshazelwa yizinto ezininzi ezifana nesakhiwo sokuphosa, izinto zokuphosa, ukwenza i-mold, ukwenza i-shell, ukubhaka, ukugalela, njl. ukuphosa.Oku kukhokelela ekuphambukeni kokuchaneka komgangatho wokusaswa kwiimfuno.Oku kulandelayo yimiba enokubangela iziphene ekuchanekeni kwedimensional ye-casts echanekileyo:
(1) Impembelelo yesakhiwo sokubunjwa: a.Ubunzima bodonga lokuphosa, isantya esikhulu sokushwabana, udonga olucekethekileyo lokuphosa, isantya esincinci sokushwabana.b.Ireyithi yokuncipha yasimahla inkulu, kwaye izinga lokucutheka elithintelweyo lincinci.
(2) Impembelelo yezinto ezibunjiweyo: a.Ukuphakama komxholo wekhabhoni kwizinto eziphathekayo, umncinci umlinganiselo wokunciphisa umgca, kunye nomxholo wekhabhoni ophantsi, umlinganiselo omkhulu wokunciphisa umgca.b.Isantya sokunciphisa izinto eziqhelekileyo zilandelayo: ukuphosa izinga lokunciphisa K = (LM-LJ) / LJ × 100%, i-LM ubukhulu becavity, kunye ne-LJ ubukhulu bokuphosa.I-K ichatshazelwa zezi zinto zilandelayo: i-wax mold K1, i-casting structure i-K2, uhlobo lwe-alloy K3, ubushushu obuthululwayo be-K4.
(3) Impembelelo yokwenziwa komngundo kumyinge wokucutheka komgca wokubunjwa: a.Impembelelo yeqondo lokushisa lokutofa kwe-wax, uxinzelelo lwe-wax, kunye noxinzelelo lokubamba ixesha kwisayizi yotyalo-mali yeyona nto icacileyo kwiqondo lokushisa le-wax, elandelwa yi-wax injection yoxinzelelo, kunye nexesha lokubamba uxinzelelo liqinisekisiwe Emva kokuba utyalo-mali lwenziwe. inempembelelo encinci kubungakanani bokugqibela botyalo-mali.b.Izinga lokunciphisa umgca we-wax (mold) impahla malunga ne-0.9-1.1%.c.Xa isikhunta sotyalo-mali sigcinwa, kuya kubakho ukuncipha ngakumbi, kwaye ixabiso layo le-shrinkage li malunga ne-10% ye-shrinkage epheleleyo, kodwa xa igcinwe kwiiyure ze-12, ubukhulu be-mold mold buzinzile.d.Umyinge wokucutheka kweradial we-wax mold yi-30-40% kuphela yereyithi yokucutheka ngobude.Iqondo lobushushu benaliti yewax linempembelelo enkulu kakhulu kwisantya sokushwabana sasimahla kunesantya sokushwabana esithintelweyo (elona qondo lobushushu lihle lokutofa yi-57-59℃, Ukuba liphezulu iqondo lobushushu, kokukhona ukushwabana okukhulu).
(4) Impembelelo yezinto zokwenza igobolondo: isanti ye-zircon, i-zircon powder, isanti ye-Shangdian kunye ne-Shangdian powder zisetyenziswa.Ngenxa ye-coefficient yabo encinci yokwandisa, kuphela i-4.6 × 10-6 / ℃, ayinakuhoywa.
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(6) Impembelelo yobushushu bokuphosa: ngokukhona iqondo lobushushu liphezulu, kokukhona ukuncipha kwesantya, kwaye okukhona lisezantsi iqondo lobushushu lokugalela, kokukhona lisiba lincinci izinga lokushwabana, ngoko ke ubushushu bokuphosa kufuneka bufaneleke.
Ixesha lokuposa: Nov-15-2021