1. Kusanthula kapangidwe ka nyumba
(1) Izivalavu ya gulugufeIli ndi kapangidwe kozungulira kooneka ngati keke, mkati mwake muli olumikizidwa ndi kuthandizidwa ndi nthiti 8 zolimbitsa, dzenje lapamwamba la Φ620 limalumikizana ndi mkati mwake, ndi zina zonsevalavuwatsekedwa, pakati pa mchenga ndi povuta kukonza ndipo n'zosavuta kuisintha. Utsi wotuluka ndi kuyeretsa mkati mwa dzenje kumabweretsa mavuto akulu, monga momwe zasonyezedwera pa Chithunzi 1.
Kukhuthala kwa khoma la ma castings kumasiyana kwambiri, makulidwe apamwamba a khoma amafika 380mm, ndipo makulidwe ochepa a khoma ndi 36mm okha. Pamene castings imakhazikika, kusiyana kwa kutentha kumakhala kwakukulu, ndipo kukhuthala kosagwirizana kumatha kupanga mosavuta mabowo ofooka ndi zolakwika za porosity ya shrinkage, zomwe zimapangitsa kuti madzi atuluke mu hydraulic test.
2. Kapangidwe ka njira:
(1) Malo olekanitsira akuwonetsedwa pa Chithunzi 1. Ikani mapeto okhala ndi mabowo pa bokosi lapamwamba, pangani pakati pa mchenga wonse pakati, ndikutalikitsa mutu wa pakati moyenera kuti muchepetse kulimba kwa pakati pa mchenga ndi kuyenda kwa pakati pa mchenga pamene bokosilo likutembenuzidwa. Lili lokhazikika, kutalika kwa mutu wa pakati pa cantilever wa mabowo awiri osawona mbali ndikutalika kuposa kutalika kwa dzenje, kotero kuti pakati pa mphamvu yokoka ya pakati pa mchenga wonse pakhale mbali ya mutu wa pakati kuti muwonetsetse kuti pakati pa mchenga pali chokhazikika komanso chokhazikika.
Njira yothira madzi yotsekedwa pang'ono imatengedwa, ∑F mkati: ∑F mopingasa: ∑F molunjika=1:1.5:1.3, sprue imagwiritsa ntchito chubu cha ceramic chokhala ndi mainchesi amkati a Φ120, ndipo zidutswa ziwiri za njerwa zopingasa za 200×100×40mm zimayikidwa pansi kuti chitsulo chosungunuka chisachoke mwachindunji. Pa nkhungu ya mchenga wogunda, fyuluta ya ceramic ya thovu ya 150×150×40 imayikidwa pansi pa runner, ndipo machubu 12 a ceramic okhala ndi mainchesi amkati a Φ30 amagwiritsidwa ntchito kuti runner yamkati ilumikizane mofanana pansi pa casting kudzera mu thanki yosonkhanitsira madzi pansi pa fyuluta kuti apange dongosolo lothira madzi pansi, monga momwe zasonyezedwera pa Chithunzi 2 Essence
(3) Ikani mabowo 14 ∮20 a mpweya m'chikombole chapamwamba, ikani dzenje la Φ200 la mchenga pakati pa mutu wa pakati, ikani chitsulo chozizira m'zigawo zokhuthala komanso zazikulu kuti muwonetsetse kuti choponderacho chili cholimba bwino, ndikugwiritsa ntchito mfundo yokulitsa graphitization kuti muletse. Chopondera chakudya chimagwiritsidwa ntchito kuti chiwongolere kuchuluka kwa njira. Kukula kwa bokosi la mchenga ndi 3600×3600×1000/600mm, ndipo chimalumikizidwa ndi mbale yachitsulo yokhuthala ya 25mm kuti chitsimikizire mphamvu zokwanira komanso kulimba, monga momwe zasonyezedwera pa Chithunzi 3.
3. Kuwongolera njira
(1) Kupanga Chitsanzo: Musanapange chitsanzo, gwiritsani ntchito chitsanzo chokhazikika cha Φ50×50mm kuti muyese mphamvu yokakamiza ya mchenga wa resin ≥ 3.5MPa, ndikulimbitsa chitsulo chozizira ndi chogwirira kuti muwonetsetse kuti nkhungu ya mchenga ili ndi mphamvu zokwanira kuti igwirizane ndi graphite yomwe imapangidwira pamene chitsulo chosungunuka chikauma. Kukulitsa kwa mankhwala, ndikuletsa chitsulo chosungunuka kuti chisakhudze gawo logwirira ntchito kwa nthawi yayitali kuti chisawonongeke ndi mchenga.
Kupanga maziko: Pakati pa mchenga pagawidwa m'magawo 8 ofanana ndi nthiti 8 zolimbitsa, zomwe zimalumikizidwa kudzera m'bowo lapakati. Palibe zothandizira zina ndi zotulutsira mpweya kupatula mutu wapakati. Ngati pakati pa mchenga sipangathe kukhazikika ndipo Utsi, kusuntha kwa pakati pa mchenga ndi mabowo a mpweya kudzawonekera mutathira. Chifukwa chakuti dera lonse la pakati pa mchenga ndi lalikulu, limagawidwa m'magawo asanu ndi atatu. Liyenera kukhala ndi mphamvu zokwanira komanso kulimba kuti litsimikizire kuti pakati pa mchenga sipawonongeka mutatulutsa nkhungu, komanso kuti silidzawonongeka mutathira. Kusintha kumachitika, kuti titsimikizire makulidwe ofanana a khoma la chopoperacho. Pachifukwa ichi, tinapanga mwapadera fupa lapadera la pakati, ndipo tinalimanga pa fupa lapakati ndi chingwe chopumira mpweya kuti tikoke mpweya wochokera kumutu wa pakati kuti titsimikizire kuti nkhungu ya mchenga ikukhala yopyapyala popanga maziko. Monga momwe zasonyezedwera pa Chithunzi 4.
(4) Bokosi lotseka: Poganizira kuti n'kovuta kuyeretsa mchenga womwe uli mkati mwa valavu ya gulugufe, pakati pa mchenga wonse papakidwa utoto ndi zigawo ziwiri za utoto, gawo loyamba limapakidwa utoto wa zirconium wokhala ndi mowa (Baume digiri 45-55), ndipo gawo loyamba limapakidwa utoto ndikuwotchedwa. Mukamaliza kuumitsa, pezani gawo lachiwiri ndi utoto wa magnesium wokhala ndi mowa (Baume digiri 35-45) kuti mupewe kutayikira kuti kusamamatire kumchenga ndi kuyaka, komwe sikungathe kutsukidwa. Gawo la mutu wa pakati limapachikidwa pa chitoliro chachitsulo cha Φ200 cha kapangidwe kake ka fupa la pakati ndi zomangira zitatu za M25, zokhazikika ndikutsekedwa ndi bokosi la mchenga lapamwamba lokhala ndi zipewa zomangira ndi kuyang'ana ngati makulidwe a khoma la gawo lililonse ndi ofanana.
4. Njira yosungunula ndi kuthira
(1) Gwiritsani ntchito chitsulo cha nkhumba cha Benxi low-P, S, Ti chapamwamba kwambiri cha Q14/16#, ndikuchiyika pa chiŵerengero cha 40% ~ 60%; zinthu zochepa monga P, S, Ti, Cr, Pb, ndi zina zotero zimawongoleredwa mosamala mu chitsulo chodulidwa, ndipo dzimbiri ndi mafuta siziloledwa, chiŵerengero chowonjezera ndi 25% ~ 40%; chobwezera chiyenera kutsukidwa ndi kuphulika ndi mfuti musanagwiritse ntchito kuti muwonetsetse kuti cholipiracho chili choyera.
(2) Kulamulira kwakukulu kwa gawo pambuyo pa ng'anjo: C: 3.5-3.65%, Si: 2.2%-2.45%, Mn: 0.25%-0.35%, P≤0.05%, S: ≤0.01%, Mg (yotsalira): 0.035% ~0.05%, pansi pa mfundo yotsimikizira kuti spheroidization ndi yotani, malire otsika a Mg (yotsalira) ayenera kumwedwa momwe angathere.
(3) Chithandizo cha Spheroidization: ma spheroidizer otsika a magnesium ndi otsika osowa akugwiritsidwa ntchito, ndipo chiŵerengero chowonjezera ndi 1.0% ~ 1.2%. Chithandizo cha spheroidization cha njira yachizolowezi yotsukira, 0.15% ya katemera kamodzi kokha imaphimbidwa pa nodulizer pansi pa phukusi, ndipo spheroidization imatsirizidwa. Kenako slag imachepetsedwa kuti ikaperekedwe kachiwiri kwa 0.35%, ndipo ikaperekedwe kwa 0.15% kumachitika panthawi yothira.
(5) Njira yothira madzi mwachangu kwambiri imatengedwa, kutentha kwa kuthira madzi ndi 1320°C ~ 1340°C, ndipo nthawi yothira madzi ndi 70~80s. Chitsulo chosungunuka sichingasokonezedwe pakuthira madzi, ndipo chikho cha sprue chimakhala chodzaza nthawi zonse kuti mpweya ndi zinthu zina zisalowe mu nkhungu kudzera mu dzenje la runner.
5. Zotsatira za mayeso oponya
(1) Yesani mphamvu yokoka ya chipika choyesera: 485MPa, kutalika: 15%, kuuma kwa Brinell HB187.
(2) Chiŵerengero cha spheroidization ndi 95%, kukula kwa graphite ndi giredi 6, ndipo pearlite ndi 35%. Kapangidwe ka metallographic kakuwonetsedwa pa Chithunzi 5.
(3) Palibe zolakwika zomwe zinapezeka mu UT ndi MT zomwe zinapezeka pakupeza zolakwika zina zofunika.
(4) Maonekedwe ake ndi osalala komanso osalala (onani Chithunzi 6), popanda zolakwika monga mchenga, zomangira zomangira, zotseka zozizira, ndi zina zotero, makulidwe a khoma ndi ofanana, ndipo miyeso yake ikukwaniritsa zofunikira za zojambulazo.
(6) Mayeso a hydraulic pressure a 20kg/cm2 atakonzedwa sanawonetse kutuluka kulikonse.
6. Mapeto
Malinga ndi kapangidwe ka valavu ya gulugufe iyi, vuto la kusinthasintha kosakhazikika komanso kosavuta kwa pakati pa mchenga waukulu komanso kuyeretsa mchenga kovuta kumathetsedwa pogogomezera kapangidwe ka ndondomeko ya ndondomekoyi, kupanga ndi kukonza pakati pa mchenga ndi kugwiritsa ntchito zokutira zochokera ku zirconium. Kukhazikitsa mabowo otulukira mpweya kumapewa kuthekera kwa ma pores mu castings. Kuchokera ku fire charge control ndi runner system, foam ceramic filter screen ndi ceramic ingate technology zimagwiritsidwa ntchito kutsimikizira kuyera kwa chitsulo chosungunuka. Pambuyo pa ma injection angapo, kapangidwe ka metallographic ka castings ndi magwiridwe antchito osiyanasiyana afika pa zofunikira za makasitomala.
KuchokeraTianjin Tanggu Water-seal valve Co., Ltd. Valavu ya gulugufe, valavu ya chipata, Chotsukira cha Y, vavu yowunikira mbale ziwirikupanga.
Nthawi yotumizira: Epulo-29-2023
