Kuwonongeka kwa Investment Casting: Zomwe Zingalakwika, Chifukwa Chake, ndi Momwe Oyambitsa Makhalidwe Abwino Amapewera

Kuponyedwa kwachitsulo kulikonse ndi nkhani yazitsulo zamadzimadzi zomwe zimazizira kukhala zolimba, ndipo monga nkhani ina iliyonse, zimatha kuchotsedwa. Porosity, shrinkage, inclusions, kutsekeka kozizira - mawu awa amawonekera pa malipoti oyambira ndi pazokambirana za RFQ, ndipo amakhala ndi mtengo weniweni akawoneka m'mbali zanu. Nkhaniyi ndi chiwongolero cha chilankhulo chosavuta pazovuta zomwe zimafunikira pakuyika ndalama: zomwe zimayambitsa chilichonse, momwe zimazindikirika, ndipo - chofunikira kwambiri - zomwe maziko abwino amachita kuti asakufikireni.

Choyamba, Uthenga Wabwino

Kuponyera ndalama ndi njira yololera kwambiri ya geometry yovuta chifukwa imayendetsa ulendo wachitsulo bwino kuposa njira zina. Phukusi la sera limapereka chibowo cholondola, chipolopolo cha ceramic chimapereka nkhungu yoyera, ndipo mazikowo amatha kudyetsa zitsulo zolimba mokhazikika. Zotsatira zake: mitengo yachilema pamizere yoyendetsedwa bwino ya silika ndi yotsika, ndipo magawo omwe amafunikira kukhala olimba, osatopa kapena oyeretsedwa bwino amapangidwa motere. Zowonongeka sizosapeweka - ndizolephera, ndipo uinjiniya wabwino umalepheretsa.

Shrinkage Porosity: Chilema Chosamvetsetseka Kwambiri

Chitsulo chamadzimadzi chikazizira mpaka kukhala cholimba, chimachepa - zitsulo zimakhala pafupifupi 2-3% ndi voliyumu. Ngati shrinkage si kulipidwa ndi zina madzi zitsulo kudya mu kuzizira zone, mbali umatha ndi mkati voids: shrinkage porosity. Izi ndizomwe ogula amadetsa nkhawa kwambiri, ndipo pazifukwa zomveka: ndi zamkati, zosawoneka kuchokera kunja, ndipo zimatha kukhala pomwe simukuzifuna - pansi pa malo osindikizira, mwa bwana wandiweyani, pamavuto.

Chifukwa chake zimachitika: kukhazikika kumayambira pakhoma la nkhungu ndikupitilira mkati. Madera otsiriza omwe amaundana - zigawo zokhuthala kwambiri, "malo otentha" - ndi omaliza kulandira zitsulo. Ngati nyumbayo sinapangepo kuponyedwa koyenera (zowonjezera / zodyetsa) ndi khomo, madera omwe akuvutika ndi njala amasokonekera.

Momwe zoyambira zabwino zimatetezera:

• Kudyetsa kamangidwe kameneka - zoyambira zamakono zimayendetsa kayeseleledwe kolimba (mwachitsanzo, MAGMA kapena zofanana) pagawo lililonse latsopano musanathire koyamba, kuwonetsa komwe malo otentha adzapangire ndikukulitsa ma feed kuti abwezere.
• Kuyika kokwera ndi kukula - zodyetsa zimayikidwa pazigawo zolemera, zokulirapo kuti zizikhala zamadzimadzi mpaka kutayirako kuzizira, kenako kuchotsedwa pambuyo pokonza.
• Kuzizira - kuzizira kwamkati kumafulumizitsa kulimba m'zigawo zolemera, kukokera malo ocheperako kupita komwe kungathe kudyetsedwa.
• Alloy-aware gating - aloyi iliyonse imachepa mosiyana; ma gating systems amapangidwa pa giredi

Momwe zimadziwikira: Kuwunika kwa X-ray (RT) ndi akupanga (UT) pazigawo zachitsanzo, kuphatikizanso - pakuyika movutikira - kugawa ndi kuyika zolemba zoyambirira kuti zitsimikizire kumveka kwamkati asanayambe kupanga.

Gas Porosity: Vuto la Bubble

Kuchuluka kwa gasi kumachitika chifukwa cha mpweya womwe umatsekeredwa muzitsulo - mipweya yosungunuka (makamaka haidrojeni muzitsulo), mpweya wa nkhungu, kapena mpweya wotsekeka panthawi yothira. Chitsulo chikaundana, gasi wosungunuka amatuluka muzitsulo ndipo amapanga thovu lozungulira. Mosiyana ndi zowonongeka, zowonongeka zowonongeka, ma pores a gasi amakhala ozungulira ndipo nthawi zambiri amagawidwa m'gawolo.

Chifukwa chake zimachitika: zinthu zonyowa kapena zonyansa, kutentha kwambiri, chipolopolo chonyowa kapena zida zapakati, kusatuluka bwino kwa nkhungu, kapena kuthira kwaphokoso komwe kumayamwa mpweya mumtsinje.

Momwe zoyambira zabwino zimatetezera:

• Zida zoyeretsera zoyera, zowuma komanso machitidwe osungunuka osungunuka (kuchotsa zitsulo)
• Kuwombera zipolopolo zomwe zimachotsa chinyezi chonse ku ceramic musanathire
• Analamuliridwa kuthira - laminar otaya, olondola kutentha, ndi kuthira liwiro chikufanana ndi chipolopolo
• Kapangidwe ka mpweya - kotero kuti mpweya wotuluka m'bowo umatuluka m'malo motsekeredwa

Momwe zimadziwikira: Kuwunika kwa X-ray; Kutsika kwa gasi kumatha kuwoneka ngati maenje ang'onoang'ono pambuyo pophulitsidwa, ndichifukwa chake malo abwino amafufuza zolemba zoyambirira ndi kuthekera kokonza, osati magawo omaliza.

Kuphatikizidwa: Matupi Akunja mu Zitsulo

Zophatikizika ndi tinthu tating'ono ting'onoting'ono - slag, refractory, nkhungu, oxides - zotsekeredwa mu kuponyera. Ndiwo chilema chomwe nthawi zambiri chimayambitsa kulephera kwa "kutayikira" pazigawo zokakamiza komanso kudabwitsa kwa makina pamene wodulayo agunda tinthu tating'ono ta ceramic.

Chifukwa chake zimachitika: kusungunuka konyansa (slag yonyamulidwa kuchokera mung'anjo), zida zokokoloka za chipolopolo zomwe zimagwera m'bowo, kapena mafilimu a oxide omwe amapangidwa panthawi yothira chipwirikiti.

Momwe zoyambira zabwino zimatetezera:

• Kuwongolera kwa slag - kapangidwe ka ladle, kugwetsa musanathire, ndikutsanulira makina omwe amatchera slag asanafike pabowo (kutsekera ndi zosefera - zosefera za thovu za ceramic ndizokhazikika pamizere yabwino)
• Kukhulupirika kwa zipolopolo - zipolopolo zolimba, zomangika bwino zomwe sizimanjenjemera; kuwongolera kumiza ndi kuwombera
• Kuthira koyera - kuwongolera kutentha, chipwirikiti chochepa, ndi zosefera pamalo ovuta
• Zosefera za ceramic foam mu gating system zimagwira ma inclusions asanalowe pakuponya - chitetezo chokhacho chophatikizira

Momwe zimadziwikira: X-ray ya inclusions zamkati, maginito tinthu (MT) chapafupi ndi pamwamba, ndi kuyang'ana kowonekera kwa malo opangidwa ndi makina.

Cold Shuts ndi Misruns: Mavuto Oyenda

Kutsekera kozizira kumachitika pamene mitsinje iwiri yachitsulo ikumana koma imalephera kuphatikizika kwathunthu - mzere wowoneka kapena wosawoneka, nthawi zambiri kumapeto kwenikweni kwa gawo lopyapyala. Misruns ndi kudzaza kosakwanira, komwe chitsulo sichinafike gawo la nkhungu. Onsewa ndi okhudzana ndi kutuluka ndipo onse amawonekera nthawi zambiri pamakhoma opyapyala.

Zomwe zimachitikira: chitsulo chozizira kwambiri, chipolopolo chozizira kwambiri, tinthu tating'onoting'ono tomwe timaundana tisanayambe kudzaza, kapena kutulutsa mpweya wokwanira komwe kumakakamiza chitsulo kumbuyo.

Momwe zopangira zabwino zimatetezera: kuwongolera kutentha kokwanira pa aloyi, zipolopolo zotenthedwa pomwe pakufunika, kuthekera kokwanira kwa zipolopolo, zitseko zopangidwira kudzaza magawo opyapyala kaye, ndikuyika kolowera kuti asapusitsidwe kumbuyo. Kuyerekezera kumawonetsa zodzaza musanathire koyamba.

Momwe zimadziwikira: kuyang'ana kowoneka ndi kuyesa (PT) pamadera omwe akukayikira; zigawo zowonda-khoma zimawunikiridwa pakuwunika kwa kapangidwe kawo.

Kung’ambika kotentha: Kung’amba Popanikizika

Misozi yotentha ndi ming'alu yomwe imapanga panthawi yolimba, pamene kuponyedwa kolimba kumakhalabe kofooka ndipo kumatsitsimutsidwa ndi kuchepa - nthawi zambiri pakusintha kwa magawo, ngodya zakuthwa, kapena kumene chipolopolo chimakaniza kutsika.

Chifukwa chiyani zimachitika: ngodya yakuthwa imayang'ana zovuta; chipolopolo chomwe chili cholimba kwambiri kapena cholimba kwambiri chimagwira kuponyedwa kwake polimbana ndi kuchepa kwake; aloyi yomwe imakhala yotentha-yochepa (yofooka pa kutentha kwakukulu) imalira mosavuta.

Momwe zopangira zabwino zimapewera: zowolowa manja zowolowa manja m'malo mwa ngodya zakuthwa (lamulo la kapangidwe kake lomwe timagwiritsira ntchito pojambula), zida zopangidwa kuti zigwe pang'ono pakuzizira, ndi kusankha kwa aloyi komwe kumalinganiza mphamvu zotentha. Kuyerekezera kumaneneratu za ngozi yong'ambika ndipo mazikowo amasintha pateni ndi chipolopolo molingana.

The Foundry's Defect-Prevention System

Kupewa sikuli mwayi - ndi dongosolo, ndipo ndiye kusiyana kwakukulu pakati pa wothandizira oponya ndi mnzake woponya. Dongosolo lomwe limagwira ntchito lili ndi zigawo zinayi:

1. Kuyerekeza -umisiri woyamba. Kulimbitsa ndi kudzaza kayeseleledwe pa gawo lililonse latsopano chida chisanadulidwe. Ichi ndiye chotsika mtengo kwambiri chopewera chilema chomwe chilipo - vuto lomwe limagwira poyerekezera limawononga ola limodzi; vuto lomwelo mu kupanga ndalama zotayika mtanda.
2. Kuwonongeka kwa nkhani yoyamba ndi NDE. Zopangira zoyamba zimayesedwa ndi X-ray, magawo, ndikuwunika mwazitsulo. Apa ndipamene kumveka kwamkati kumatsimikiziridwa - chida chisanatulutsidwe kuti chitsatire.
3. Kuwongolera njira zowerengera popanga. Magawo omwe amayendetsa zolakwika - kuthira kutentha, mtundu wa chipolopolo, chemistry yosungunuka - amayezedwa ndikuwongolera malire, osati "kungoyang'aniridwa."
4. Zipata zoyendera m'ntchito. RT/UT pazigawo zachitsanzo pamayendedwe ofotokozedwa, MT/PT pamalo ovuta, ndi macheke a CMM amtundu - kotero kutengeka kumagwidwa mu maola, osati pambuyo potumiza.

Ku Ningbo Ruican, iyi ndi njira yomwe certification yathu ya IATF 16949 imafunikira komanso kuti zaka zathu 17+ zakusewera zakonzedwanso. Ngati zojambula za kasitomala zili ndi geometry yowopsa - bwana wolemera pafupi ndi khoma lopyapyala, ngodya yakuthwa yamkati, kuyesa kokakamiza - gulu lathu la mainjiniya limayimilira pamawu, osati pambuyo pa gulu loyamba loyipa.

Zomwe Ogula Ayenera Kufunsa Zoyambira Zawo

Yankho la foundry ku mafunso awa limakuuzani zambiri kuposa kabuku kalikonse:

1. "Kodi mumayendetsa kayeseleledwe kolimba pagawo lililonse latsopano?" - Ngati yankho liri la "zigawo zovuta zokha," funsani kuti ndi mbali ziti zomwe zalumphidwa ndipo chifukwa chiyani.
2. "Dongosolo lanu lotsimikizira nkhani yoyamba ndi liti?" - Kodi iwo X-ray ndi gawo loyamba nkhani, kapena fufuzani miyeso?
3. "Mumayika kuti zosefera pachipata chanu?" - Zosefera za ceramic pamizere yabwino ndizokhazikika; "sitimawagwiritsa ntchito" ndi chizindikiro chochenjeza.
4. "Kodi mitengo yanu yokhudzana ndi vuto ndi yotani pazigawo zofananira?" - Nambala yeniyeni, ngakhale si ziro, yankho lomwe mukufuna.
5. "Munasintha chiyani pambuyo pa chilema chanu chomaliza?" - Chikhalidwe chowongolera mosalekeza chikuwonetsa mayankho omveka.

Pansi Pansi

Zowonongeka za kutaya si zachinsinsi. Aliyense wa iwo - shrinkage, mpweya porosity, inclusions, ozizira kutseka, misozi yotentha - ali ndi chifukwa mu ulamuliro ndondomeko, ndipo aliyense akhoza kupewedwa ndi zomangamanga. Zopeza zomwe zimalepheretsa zolakwika nthawi zonse ndizomwe zimakhala ndi kuthekera koyerekeza, kuwongolera kotsimikizika kwa nkhani yoyamba, SPC pakupanga, ndi dongosolo labwino lomwe limapangitsa kupewa kukhala kovomerezeka m'malo mosankha.

Ningbo Ruican amapanga zopangira ndalama mu chitsulo cha kaboni, chitsulo cha aloyi, chitsulo chosapanga dzimbiri ndi chitsulo cha ductile, chokhala ndi makina amkati a CNC, luso la NDE, ndi kasamalidwe kabwino ka IATF 16949. Ngati muli ndi gawo lomwe kumveka bwino kwamkati kumafunikira - valavu, choyikapo pampu, bulaketi yomangika - titumizireni zojambulazo ndikukuwonetsani momwe tingapewere.

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