Lokacin da injiniyoyi suka ƙididdige sassa na simintin kakin bakin karfe da aka rasa don bawul ɗin ruwa ko gidajen famfo mai matsa lamba, ba kawai suna yin odar karfe ba—suna buƙatar kwanciyar hankali mai girma, daidaiton ƙayyadadden tsari, da juriya na lalata a ƙarƙashin damuwa na ainihi na duniya. Wannan shine dalilin da ya sa ɗimbin girma na Arewacin Amurka da Turai OEMs yanzu suna gano mahimman abubuwan da suka shafi koma baya zuwa tushe ɗaya a Qingdao: masana'antar simintin ƙarfe ta bakin karfe da aka rasa wacce aka gina ba ta kusa da girma ba, amma ta tsarin horo na ƙarfe.
Me yasa Simintin Zuba Jari Har yanzu Yayi Nasara don Complex Bakin Karfe Geometries
Simintin kakin zuma da aka rasa—simintin saka hannun jari — ya rage bai yi daidai da sassa na bakin karfe tare da katangar bakin ciki, wurare na ciki, juriya (±0.05 mm na yau da kullun), da buƙatun daftarin sifili. CNC machining kadai ba zai iya isa cikin kwanon rufi na piston famfo Silinda gidaje ba tare da mahara saituna, kayan aiki tsangwama, ko sharar gida sharar gida fiye da 70%. Yashi simintin gyare-gyare ba shi da gamawa (<3.2 µm Ra) da daidaiton hatsi da ake buƙata don aikace-aikacen gajiya mai mahimmanci. Zuba jari gada gada wanda rata-amma kawai idan kafuwar yana sarrafa cikakken sarkar: kakin zuma tsari daidaici, yumbu harsashi halitta, sarrafa dewaxing, vacuum-taimaka zuba, da post-cast zafin jiki jiyya ga ASTM A487 ko AMS 5659.
Mun ga abokan ciniki suna canzawa daga gidaje 316 da aka jefar yashi zuwa simintin saka hannun jari na F316L bayan fashewar da aka yi a gidajen haɗin gwiwa. Tushen dalili? Rashin daidaituwa tsakanin tsaka-tsaki a cikin simintin yashi. Tsarin mu yana amfani da ƙwararrun ingots, injin-narke-mai ganowa zuwa lambar zafi-kuma yana riƙe ƙimar ƙarfafawa tsakanin ± 5% a cikin batches 120 kg. Babu ilimin kimiyya "mai kyau". Kowane zube ya haɗa da tabbatarwa da bayyani kafin harba harsashi.
Ƙarfin Ƙarfi guda huɗu waɗanda ba za ku iya yin sulhu ba
Bakin karfe na gaskiya da aka rasa masana'antar simintin kakin zuma dole ne ya mallaki waɗannan ayyuka guda huɗu-ba kwangilar su ba:
- Raw kayan kulawa: Muna samo kai tsaye daga masana'anta tare da takaddun shaida EN 10204 3.1. Babu takardun kudi na dillali. Don F22, F28, ko maki duplex na al'ada, muna tabbatar da abun ciki na ferrite pre-zuba ta amfani da binciken induction na maganadisu - ba kawai rahotannin dakin gwaje-gwaje na bayan-zafi ba.
- CMM-haɗin kai iko mai girma: Kowane kuri'a yana samun cikakken ingantaccen GD&T akan Zeiss Contura G2 RDS. Mahimman bayanai-kamar madaidaicin wurin zama na bawul ko runout jarida-ana auna *kafin* maganin zafi, sannan a sake duba bayan an kawar da damuwa. Muna tuƙi mai tuƙi> 0.015 mm nan da nan.
- Ƙarfin gamawa na zamani: Filayen simintin gyare-gyare ba na ƙarshe ba ne. Muna injin rufe fuskoki zuwa Ra 0.8 µm, amfani da electropolishing ta ASTM B912, kuma muna yin gwajin leak na helium a 10⁻⁹ mbar · L / s don bawul ɗin matsa lamba. Babu “kayan kwalliya” da aka goge hannu da aka gama-muna auna santsin aiki.
- Rashin gaza-yanayin-sane da aikin injiniya: Lokacin da abokin ciniki ya aika da zane don bututun ƙarfe na cobalt alloy AMS 5387, ba kawai za mu faɗi ba. Muna duba juzu'in kauri na bango, gano yuwuwar wurare masu zafi a cikin shimfidar bishiyar kakin zuma, kuma muna ba da shawarar gyare-gyaren radius waɗanda ke hana microporosity - bisa 147 da aka riga aka gina na geometries iri ɗaya.
Abin da Abokan Ciniki A Haƙiƙa suke Gwaji-Ba kawai Abin da Suka Ƙira ba
Takaddun takaddun takaddun suna lissafin ƙarfi da taurin ƙarfi. Ingantacciyar ingantacciyar duniya tana gwada wani abu dabam: maimaitawa cikin kewayon zafi. Ɗaya daga cikin masana'antun famfo na Turai ya yi gwajin juriya na sa'o'i 500 akan injin mu na F304L. Sun bin diddigin juzu'in radial runout bayan kowane awa 100 a 120 ° C da nauyin 35 MPa. Sakamako? Matsakaicin matsakaicin ya tsaya ƙasa da 0.008 mm—a cikin rabin ƙungiyar haƙuri ta farko. Me yasa? Saboda jerin simintin gyaran gyare-gyaren mu na kulle-kulle a cikin saura damuwa da wuri: mafita anneal → m CNC → tsufa → gama niƙa. Ba akasin haka ba.
Wannan shine bambanci tsakanin mai jigilar kayayyaki da wanda ke jigilar kayan aiki. Muna shiga kowane zagayowar yanayin zafi, kowane rahoton CMM, kowane sakamakon binciken ultrasonic-ba don takaddun yarda ba, amma don haka lokacin da wani sashi ya gaza a cikin filin, muna sake gina tarihin zafinsa da injina cikin ƙasa da mintuna 90.
Zaɓar Abokin Hulɗar ku Ba Game da Geography ba ne—Game da Zurfin Nesa
Ee, Qingdao tana ba da fa'idodin dabaru don jigilar kayayyaki da Asiya da tekun Pasifik. Amma abin da ke da mahimmanci a duniya shine ko masana'antar simintin kakin kakin ka ta rasa na iya tabbatarwa - har zuwa takardar shedar niƙa da log ɗin tanderun - dalilin da yasa takamaiman tsari ya hadu da ASTM A743 Grade CF8M maimakon faɗuwa da 0.3% Mo. Ko ka'idar binciken su na buƙatar ma'auni masu zaman kansu guda uku a kowane mahimmanci - ba ɗaya ba. Shin ko ƙungiyar R&D tasu ta buga nazarin shari'ar akan rage raguwar porosity a cikin T800 alloy impeller vanes (muna da).
QINGDAO QIANGSENYUAN TECHNOLOGY CO., LTD. tana aiki ta wannan hanya saboda injiniyoyinta sun kwashe shekaru suna gyara majalissar famfo da suka gaza a cikin rijiyoyin da ke cikin teku - ba rubuta bayanai dalla-dalla a cikin dakunan allo ba. Kayan aikin su ba “an tabbatar da ISO-certified” azaman lamba ba; an tsara shi ta yadda kowane ma'aikaci ya san yadda karkacewar 2°C a cikin zafin zafin harsashi ke shafar ɗaukar carbon a cikin 17-4PH.
Idan kana buƙatar bakin karfe da aka rasa sassan simintin kakin zuma waɗanda ke tsira inda wasu gajiya, lalata, ko ɗigo-fara da ganowa. Sannan nemi hujja. Sannan ka tabbatar da kanka. Wannan shine yadda abubuwa masu mahimmancin manufa suke samun wurinsu - ba akan shiryayye ba, amma a cikin sabis.
