Shell gyare-gyaren simintin gyare-gyare yana ba da daidaito, maimaitawa, da ƙarewar ƙasa wanda bai dace da simintin yashi na al'ada ba-musamman don matsakaici-matsakaici, manyan abubuwan haɓaka kamar jikin bawul ɗin ruwa, gidajen famfo, da magudanan winch. Mun samar da ƙarfe sama da 12,000 da aka ƙera harsashi da simintin ƙarfe a cikin shekaru uku da suka gabata kaɗai—mafi yawa ƙarƙashin ± 0.15 mm juriyar juzu'i da Ra 3.2 µm as-cast surface. Wannan ba ka'idar ba ce. Abin da ke faruwa ne lokacin da kuka haɗu da sinadarai na resin phenolic, yanayin zafin akwatin da aka sarrafa, da kuma sa ido kan kauri na harsashi a kan bene na kanti.
Mataki 1: Shiri Tsari - Daidaitawa yana farawa da Jagora
Muna amfani da tauraruwar karfe ko ƙirar aluminium-ba itace ko ƙura mai narkewa ba-don gyare-gyaren harsashi. Me yasa? Domin tsarin rayuwa yana sarrafa farashi kai tsaye a kowane sashi a juzu'i sama da raka'a 500. Tsarin mu sun haɗa da madaidaitan kusurwoyi na daftarin aiki (0.5°-1.5°), ramukan huɗa waɗanda ba su kunkuntar sama da 0.8 mm ba, da kuma haɗaɗɗun fasalulluka waɗanda ke kawar da yankan mai gudu. Kowane tsari yana fuskantar tabbacin CMM akan abokin ciniki GD&T kafin amfani da farko. Wasu abokan ciniki suna aiko mana da samfuran bugu na 3D don gwaji na aiki-amma ba mu taɓa jefawa ba. Rashin daidaituwar haɓakar zafi tsakanin bugu na guduro da narkakkar ƙarfe yana haifar da rashin tabbas a cikin harsashi.
Mataki na 2: Samuwar Harsashi - Zafi, Resin, da Lokaci Ba Ne Tattaunawa ba
Tsarin yana preheated zuwa 220-250 ° C. Yayi sanyi sosai? Maganin guduro bai cika ba. Yayi zafi sosai? Bazuwar da wuri da lahani na iskar gas. Muna shafa shi da yashi silica mai kyau (40-100 raga) gauraye da 2.5-5% thermosetting phenolic guduro. Tsarin da aka lulluɓe yana jujjuya cikin akwatin juji na tsawon daƙiƙa 10-20 - tsayin daka don samar da harsashi na 6-12 mm. Sa'an nan kuma a juya da gasa a 380-420 ° C na minti 2-4. Wannan gasa ta ƙarshe ta haɗe guduro cikakke. Tsallake shi, kuma harsashi ya ruguje yayin haɗuwar mold. Muna saka idanu zafin tanda kowane daƙiƙa 90 ta amfani da ma'aunin thermocouples - ba karatun yanayi ba.
Mataki na 3: Matsakaicin Tsari - Daidaitawa yana Ƙarfafa Ƙarfafa Girma
Ana manne da rabin-harsashi biyu tare da manne mai zafi mai kunna wuta ko manne da injina. Babu yumbu, babu kusoshi, babu tef. Kuskure na ko da 0.3 mm yana nunawa azaman walƙiya akan filaye masu ɗaukar matsi-kamar flanges na gidaje na silinda ko wuraren zama na bawul. Don sassan asymmetrical, muna amfani da fil ɗin dowel tare da jurewar matsayi na ± 0.01 mm. Kafin a zuba, kowane mold ɗin da aka haɗa yana wucewa ta tashar daidaitawa ta gani. Idan tazarar da ke tsakanin rabi ya wuce 0.1 mm a kowane wuri, an cire shi - ba a sake yin aiki ba. Sake haɗuwa yana gabatar da kuskuren tarawa.
Mataki na 4: Zubawa da Ƙarfafawa - Gudun Gudanarwa Yana Hana Hargitsi
- Ana gudanar da zafin jiki a cikin ± 15 ° C na mafi kyawun kewayo-misali, 1,420-1,450 ° C don ASTM A126 Class B baƙin ƙarfe.
- Ƙarfe yana shiga ta hanyar gating na ƙasa don rage tarkon oxide
- Shakeout yana faruwa bayan mintuna 15-25 bayan an gama zubawa-lokacin da kauri kowane sashe, ba lokacin agogo ba
- Babu sanyaya tilas. Matsewar gaggawa yana fasa harsashi kuma yana haifar da damuwa a cikin gidaje masu katanga
Mun taɓa zubar da gidaje 48 iri ɗaya na piston famfo Silinda a cikin zafi ɗaya. Shida sun nuna ƙananan raguwa a cikin tashar tashar bawul. Tushen dalili? Faɗuwar zafin jiki na 7°C a lokacin 12 na ƙarshe. Yanzu muna shigar da zafin jiki don kowane nau'i-nau'i-kuma mu ƙi kowane tsari inda bambancin ya wuce ± 10 ° C.
Mataki na 5: Gudanar da Simintin Fitar-Bayan - Inda Aka Yi Nasara Ko Bacewa
Yin gyare-gyaren harsashi yana ba da siffar kusa-net-amma ba siffa ta yanar gizo ba. Mahimman abubuwan rufewa har yanzu suna buƙatar injin CNC. Shi ya sa muke haɗa simintin gyare-gyare da injina a ƙarƙashin rufin ɗaya. Simintin ƙarfe ɗin mu yana tafiya kai tsaye daga shakeout zuwa cibiyoyin injin kwance-babu matsakaicin ajiya. Me yasa? Zubar da danshi zuwa saman fashe-fashe yana haifar da ramukan hydrogen a lokacin maganin zafi na gaba. Har ila yau, muna guje wa harbe-harbe a kan sassan da aka ƙaddara don aikace-aikacen AMS 5387 masu jituwa; Kafofin watsa labarai na kusurwa suna lalata tsarin hatsin da ke kusa da saman da ake buƙata don juriya ga gajiya a cikin abubuwan famfo na cobalt-alloy.
Shell gyare-gyaren simintin gyare-gyaren ya zarce inda yashi simintin gyare-gyaren da ba shi da daidaito da zuba jarurruka na kasafin kuɗi-yawanci ga sassa masu nauyin kilogiram 0.5 zuwa 50, adadin shekara-shekara daga raka'a 1,000 zuwa 50,000, da kayan da suka haɗa da baƙin ƙarfe ductile, carbon karfe, bakin karfe, da kuma nickel-resistant gami. A QINGDAO QIANGSENYUAN TECHNOLOGY CO., LTD., Muna ɗaukar gyare-gyaren harsashi ba a matsayin tsari kaɗai ba amma a matsayin kumburi ɗaya a cikin ingantaccen madauki-machining-kammala madauki. Kowane kayan da aka ƙera harsashi da muke jigilar su yana ɗaukar cikakkun abubuwan gano abubuwa, ƙimar CMM da aka tabbatar da su, da tarihin zafin rana da aka rubuta-daga gasa ƙirar zuwa sauƙi na ƙarshe. Wannan shine yadda bawul ɗin matsa lamba ke tsira 20,000 PSI cycles. Wannan shine yadda winch centre rollers ke kula da gudu a ƙarƙashin 0.02 mm bayan awanni 10,000. Ba a samun daidaito a mataki ɗaya. An kulle shi - mataki-mataki.
