Lokacin da injiniyoyi suka ƙididdige simintin saka hannun jari na silica sol don madaidaicin sassa na ƙarfe, ba kawai zaɓin tsari bane—suna zaɓar garantin kwanciyar hankali, amincin saman ƙasa, da daidaiton ƙarfe a ƙarƙashin matsanancin yanayin sabis. A QINGDAO QIANGSENYUAN TECHNOLOGY CO., LTD., Mun jefa fiye da 12,000 musamman sassan lambobi ta amfani da silica sol-mafi yawan a cikin cobalt-nickel gami kamar AMS 5387 da T800-inda ± 0.05 mm haƙuri ba manufa ba; shi ne tushe.
Me yasa silica sol - ba gilashin ruwa ko filasta ba - yana ba da daidaitattun maimaitawa
Yawancin masu siye suna ɗauka "simintin saka jari" hanya ɗaya ce. Ba haka ba. Tsarin ɗaure yana bayyana iyakokin aiki. Silica sol yana amfani da silica colloidal (SiO₂ nanoparticles da aka dakatar a cikin ruwa) azaman ɗaure na farko. Ƙananan danko yana shiga cikin cikakkun bayanai; high refractoriness jure 1,550C zuba yanayin zafi don superalloys. Tsarin gilashin ruwa yana fashe a ƙarƙashin girgizar zafi. Filayen filasta suna raguwa sama da 600°C — suna lalata ƙananan tsarin a cikin gidajen famfo na tushen cobalt.
Mun ga abokan ciniki sun canza daga gilashin ruwa zuwa silica sol bayan batches uku a jere sun gaza gwajin matsa lamba a mashaya 420. Tushen dalili? Microcracks a cikin bangon harsashi, wanda ba a iya gani a gani amma an tabbatar da su ta hanyar SEM fractography. Silica sol shells ba su nuna irin wannan aibi ba—har ma akan kaurin 0.3 mm a cikin majalissar bututun injin turbine. Abin da ya sa masana'antar simintin saka hannun jari na silica Sol ɗinmu tana riƙe da ISO 9001: takaddun shaida na 2015 tare da cikakkiyar traceability ƙasa zuwa zafi da yawa, girman rabon slurry, da sarrafa raɓa yayin bushewa.
Haɗin kai tsaye ba talla ba ne - shine yadda muke riƙe ± 0.03 mm akan gidajen silinda 300-mm
Wasu masu samar da kayayyaki suna fitar da harsashi, simintin gyare-gyare, da injina. Muna yin duka ukun a cikin kayan aikin da ya dace da ISO a Qingdao. Me yasa hakan ke da mahimmanci? Saboda gidan famfo na silinda na piston yana buƙatar daidaitawar haɓakar zafi tsakanin harsashi, gami, da daidaitawar CNC. Lokacin da yin simintin gyare-gyare da mashin ɗin ke faruwa a ƙarƙashin rufin ɗaya, muna ƙididdige binciken CMM akan abubuwan da aka jefa-ba ƙirar CAD ba. Muna auna ɓangarorin shrinkage a kowane tsari na gami, sannan mu daidaita hanyoyin kayan aiki kafin yanke.
Misali: AMS 5387 cobalt alloy yana raguwa 1.82% a layi a cikin silica sol molds-amma kawai lokacin da raɓa ta tsaya ƙasa -25°C yayin bushewa ta ƙarshe. Muna shiga kowane zagayowar bushewa. Idan zafi ya karu, muna sake fitar da harsashi. Babu ware. Wannan horo yana ba mu damar riƙe kiran GD&T kamar matsayi ⊕ 0.05 mm MMC akan ramukan hawa takwas daidai-da-wane-ba tare da niƙa na biyu ba.
Ingancin-duniya ta gaske-ba ƙayyadaddun ƙayyadaddun lab ba-yana tuƙi abu da zaɓin tsari
Abokan ciniki suna tambaya: "Shin za ku iya jefa gami da T800 a cikin abin nadi mara kyau na cibiyar winch?" Ee-amma kawai idan mun fara inganta ƙirar gating da farko. T800 yana ƙarfafawa tare da rarrabuwar dendritic mai tsanani. Ƙofar da ba ta da kyau tana haifar da porosity na tsakiya a kafadar diamita na mm 75. Muna gudanar da simintin gyare-gyare mai ƙarfi (ta amfani da MAGMASOFT®), sannan mu tabbatar da gwajin X-ray CT akan simintin gwaji uku. Sai kawai za mu amince da tsarin.
Wannan shine inda gwaninta ke raba ka'idar da bayarwa. Mun jefa nozzles na cobalt don famfunan allura na karkashin teku masu aiki a 120 ° C da mashaya 350. Rashin gazawa yana nufin lokacin kashe $2M. Don haka muna gwada kowane tsari: ƙarfin ƙarfi ≥1,050 MPa, elongation ≥8%, da juriya na lalata intergranular ta ASTM G28A. Babu takaddun shaida ba tare da bayanan gwaji ba. Babu jigilar kaya ba tare da sa hannun rahoton dubawa ba.
Abin da ake tsammani lokacin haɗin gwiwa tare da masana'antar simintin saka hannun jari na silica sol
Idan sashinku yana da siraran bango (<2 mm), hadaddun hanyoyin shiga ciki, ko buƙatun Rz ≤ 1.6 µm as-cast surface gama-kana buƙatar silica sol. Amma nasara ya dogara ne akan haɗin gwiwa, ba kawai iyawa ba. A QINGDAO QIANGSENYUAN, aikin injiniya yana farawa kafin a faɗi: muna ba da alamar kusurwoyi a ƙarƙashin 0.5 °, muna ba da shawarar radi don rage damuwa, kuma muna tabbatar da ko za a iya jefa fasalin-ko kuma dole ne a yi amfani da shi bayan zuba.
Ba mu sayar da simintin gyare-gyare. Muna isar da kayan aikin aiki: bawul ɗin matsa lamba waɗanda ke hatimi a mashaya 450, tushen famfo wanda ke datse girgizawar rpm 3,200, winch shaft rollers waɗanda ke tsira 10⁶ hawan keke a cikin iska mai ɗauke da gishiri. Kowane oda ya haɗa da takaddun shaida, rahotannin CMM, da rajistan ayyukan kula da zafi. Lokacin jagora? Makonni 14 don labarin farko, makonni 8 don maimaitawa - garanti. Ba a yi alkawari ba. Garanti.
A gaban gaba, mu silica sol zuba jari simintin gyare-gyare factory na fadada ta matasan tsari line- hadedde kusa-net-siffar simintin gyaran kafa tare da Multi-axis milling a cikin saitin guda. Wannan yana kawar da kurakurai na sake gyarawa kuma yana yanke jimlar lokacin sake zagayowar da kashi 37% don sassa kamar tubalan na'ura mai ɗaukar hoto. Daidaito ba a tsaye ba. Mu ma.
