Lokacin da injiniyoyi suka bayyana jefa baƙin ƙarfe zuba jari simintin ƙera masana'anta factory mafita, ba kawai siyan sassa bane - suna tabbatar da kwanciyar hankali a ƙarƙashin hawan keken zafi, daidaiton microstructural a cikin batches 500, da rashin haƙuri ga porosity a cikin manyan bawul ɗin bawul. Mun ga ayyuka da yawa da aka jinkirta ta hanyar masu samar da kayayyaki waɗanda ke kula da simintin saka hannun jari a matsayin tsari mai girman-daidai-dukkan tsari-musamman tare da baƙin ƙarfe mai launin toka da ductile, inda daidaitaccen sarrafa carbon, ƙimar preheat raɓa, da sarrafa raɓa a cikin ginin harsashi kai tsaye yana nuna machinability da rayuwar gajiya.
Me yasa Cast Iron Ya Bukaci Fiye da Kafa kawai
Ƙarfin simintin gyare-gyare ba shi da "sauƙi don jefawa" kawai saboda yana gudana da kyau. Halin halittarsa na graphite - flakes a cikin baƙin ƙarfe mai launin toka, nodules a cikin ductile - yana amsawa sosai ga ƙimar sanyaya, lokacin inoculation, har ma da zafi na yanayi yayin taron ƙirar kakin zuma. A mu ISO-compliant makaman a Qingdao, mu bi da kowane da yawa kamar wani karfe gwaji: albarkatun kasa takaddun shaida tabbatar kafin alloying, tanderun narkewa sa ido ta real-lokaci spectrometry, da harsashi molds gasa a 1,100 ° C tare da 30-minti zauna lokaci-ba domin misali ya ce haka, amma saboda mun auna a lokacin da 2-2sh 0 C rage micro-2sh. don> 25 minutes.
Mun isar da gidaje sama da 470 na bawul ɗin matsa lamba don tsarin injin mai aiki a mashaya 420-babu wanda ya gaza cikin sabis. Me yasa? Domin ba mu tsaya a ASTM A536 ko GB / T 1348. Mun inganta nodularity via image bincike a kan kowane uku simintin, gudu tensile sanduna daga guda zuba a matsayin samar part, da kuma taswirar taurin gradients a fadin Silinda gidaje ganuwar ta yin amfani da 12-point Rockwell C scans. Wannan shine yadda zaku kama yankin sanyi mai dabara wanda ke juya bangon 30mm zuwa gamuwa mai tsini.
Inda Simintin Zuba Jari ya buge Sand-kuma Lokacin da Bai Yi ba
Simintin saka hannun jari yana ba da juriyar juzu'i na mm ± 0.05 mm da Ra 1.6 µm as-cast surface gama-mahimmanci don gidaje na famfo na silinda inda hatimin ginshiƙan hatimi ke ba da ƙima. Amma muna gaya wa abokan ciniki a gaba: idan ɓangarenku yana da nauyi fiye da 45 kg ko yana da fa'ida ta ciki fiye da 8 mm, simintin yashi sau da yawa yana ba da kwanciyar hankali da ƙarancin farashi a kowace kilogram. Mun yi nisa daga ƙididdiga inda yashi zai ba da daidaiton kauri na bango-saboda gaskiya yana hana faɗuwar filin.
Tsarin aikinmu na matasanmu yana cike gibin. Misali: winch center shaft rollers farawa azaman saka hannun jari-castile iron (ASTM A), sannan a kunna CNC kunna lathes 5-axis zuwa mujallu masu ɗaukar gaskiya tsakanin 0.015 mm TIR. Maganin zafi yana biye-quenching a 890 ° C, mai zafi a 620 ° C - sannan harbi peening don haifar da + 280 MPa surface matsa lamba. Sakamakon? Rayuwar shaft ta tsawaita 3.7 × a cikin aikace-aikacen abin hawa na injiniyan teku inda grit mai cike da gishiri yana haɓaka rami.
Hudu Marasa Tattaunawa a cikin Ƙirƙirar Simintin Ƙarfe Mai Ƙarfi
Kowa jefa baƙin ƙarfe zuba jari simintin ƙera masana'anta factory da'awar dogara dole ne ya nuna waɗannan sarrafawa guda huɗu:
- Abubuwan ganowa zuwa lambar zafi-ba kawai certs na niƙa ba, amma rahotannin sake gwadawa na Si, Mn, P, S, da sauran Cu/Ni/Cr a kowane tsari;
- Tabbatar da ingancin Shell-muna amfani da gwajin leak na helium akan simintin gyare-gyare masu mahimmanci, ba wai kawai duban gani ba;
- Ƙofar girma a cikin tsari-CMM yana bincika bayan cire kakin zuma, bayan harbe-harbe, da fashewar fashewar-kafin a fara injin;
- Tabbatar da aiki akan na'urorin gwaji-jikin bawul ɗin da aka gwada-gwaji a matsa lamba 1.5 ×; famfo gidaje juyi-daidaitacce zuwa G2.5 grade.
Mun ƙi kashi 8.3% na simintin gyare-gyare na farko-ba don lahani na kwaskwarima ba, amma saboda kiran GD&T akan filaye masu hawa flange ya wuce 0.03 mm juriya. Wannan horon yana gudana zuwa matsakaicin matsakaici: tsarin tsarin mu mai ƙarfi yana ba da lokacin buffer don daidaita busasshen busasshen lokacin da damina ta ƙaru sama da 75% RH. Domin simintin gyare-gyare ba game da cikakken yanayi ba ne - game da sarrafa masu canji ne da za ku iya aunawa.
Abin da Injiniya Ake Bukata—Ba Abin da Rubuce-rubucen Yayi Alkawari ba
Kuna buƙatar haske kan cinikin lokacin jagora: simintin saka hannun jari yana ƙara makonni 2-3 don yin kayan aiki da ginin harsashi, amma yana kawar da injiniyoyi na biyu akan 68% na fasalulluka a cikin ƙirar tushen famfo na yau da kullun. Kuna buƙatar bayyana gaskiya akan daidaitawar cobalt-alloy-muna jefa AMS 5387 akai-akai tare da ductile baƙin ƙarfe a cikin tsarin ƙofofin da aka raba, amma kawai bayan tabbatar da rashin daidaituwar haɓakar thermal ta hanyar simintin siminti na gaba mai ƙarfi. Kuna buƙatar wani wanda zai tuƙi rikice-rikicen GD&T da wuri: mun sami haƙurin matsayi na 0.02 mm akan ramin dowel na mm 12 wanda ke buƙatar ƙaura duk tsarin datum - ajiyar $24k a cikin simintin da aka soke.
QINGDAO QIANGSENYUAN TECHNOLOGY CO., LTD. baya sayar da simintin gyaran kafa. Muna warware hanyoyin gazawar aiki-hanyoyin ɗigogi, murɗaɗɗen zafi, ɓarna - ta hanyar daidaita ƙarfe, tsarin kimiyyar lissafi, da niyyar ƙirar injina. Ƙarfin mu ya ta'allaka ne a cikin yin ƙananan abubuwa, amma yin su tare da rubuce-rubucen maimaitawa: daga T800 cobalt nozzles da ke sarrafa 650°C narkakkar slag zuwa tudun famfo-baƙin ƙarfe waɗanda ke tsira na shekaru 15 a cikin teku ba tare da lalacewa ba.
Idan aikin ku na gaba ya buƙaci jefa baƙin ƙarfe zuba jari simintin ƙera masana'anta factory iyawar da aka samo asali a ma'auni-ba tallace-tallace ba-fara da nazarin zane. Za mu gaya muku abin da ke samarwa, abin da ke buƙatar sake fasalin, da kuma ainihin inda hadarin ke rayuwa. Ba a cikin m sharuddan. A cikin microns, megapascals, da lambobi masu zafi na kayan abu.
