1. Tsarin bincike
(1) Wannanmalam buɗe idoyana da tsarin madauwari mai siffar cake, an haɗa rami na ciki kuma yana goyan bayan haƙarƙarin ƙarfafa 8, saman Φ620 rami yana sadarwa tare da rami na ciki, da sauranbawulan rufe shi, tushen yashi yana da wuyar gyarawa kuma yana da sauƙin lalacewa. Dukan shaye-shaye da tsaftace rami na ciki suna kawo matsaloli masu yawa, kamar yadda aka nuna a hoto na 1.
Kaurin bangon simintin gyare-gyaren ya bambanta sosai, matsakaicin kauri na bango ya kai 380mm, mafi ƙarancin kaurin bangon shine kawai 36mm. Lokacin da aka ƙarfafa simintin gyare-gyare, bambancin zafin jiki yana da girma, kuma rashin daidaituwa na raguwa zai iya haifar da raguwa da lahani na porosity cikin sauƙi, wanda zai haifar da zubar da ruwa a gwajin hydraulic.
2. Tsarin tsari:
(1) Ana nuna shimfidar wuri a cikin Hoto 1. Saka ƙarshen tare da ramuka a kan akwatin na sama, yi babban yashi a cikin rami na tsakiya, kuma ƙara tsayin ainihin kai yadda ya kamata don sauƙaƙe daɗaɗɗen yashi da motsi. tsakiyar yashi lokacin da akwatin ya juya. Barga, tsawon cantilever core shugaban na biyu makafi ramukan a gefe ya fi tsayi da tsawon ramin, sabõda haka, tsakiyar nauyi na dukan yashi core ne biased zuwa gefen da core shugaban don tabbatar da cewa. yashi core kafaffe kuma barga.
Ana ɗaukar tsarin zubar da ruwa mai rufewa, ∑F ciki: ∑F a kwance: ∑F madaidaiciya = 1: 1.5: 1.3, sprue yana amfani da bututun yumbu tare da diamita na ciki na Φ120, da guda biyu na 200 × 100 × 40mm refractory Ana sanya tubali a ƙasa don hana narkakken ƙarfe daga kai tsaye Don tasirin yashi mai yashi, an shigar da 150 × 150 × 40 yumbu mai tacewa a kasan mai gudu, kuma ana amfani da tubes yumbura 12 tare da diamita na ciki na Φ30 mai gudu na ciki don haɗa daidai da kasan simintin ta hanyar tankin tattara ruwa a kasan tace don samar da tsarin zubar da ƙasa, kamar yadda aka nuna a hoto na 2 Essence.
(3) Sanya ramukan iska na 14 ∮20 a cikin mold na sama, sanya Φ200 yashi core huda rami a tsakiyar babban kan, sanya baƙin ƙarfe mai sanyi a cikin kauri da manyan sassa don tabbatar da daidaiton rarrabuwar simintin, kuma amfani da Ƙa'idar faɗaɗa graphitization don soke Ana amfani da hawan ciyarwa don inganta yawan amfanin ƙasa. Girman akwatin yashi shine 3600 × 3600 × 1000/600mm, kuma an yi masa walda da farantin karfe mai kauri 25mm don tabbatar da isasshen ƙarfi da ƙarfi, kamar yadda aka nuna a hoto na 3.
3. Gudanar da tsari
(1) Modeling: Kafin yin tallan kayan kawa, yi amfani da samfurin misali na Φ50 × 50mm don gwada ƙarfin matsawa na yashin guduro ≥ 3.5MPa, kuma ƙara ƙarfin ƙarfe mai sanyi da mai gudu don tabbatar da cewa ƙirar yashi yana da isasshen ƙarfi don kashe graphite da aka samar. lokacin da narkakkar baƙin ƙarfe ke ƙarfafa faɗaɗa sinadarai, kuma yana hana narkakken ƙarfe yin tasiri ga ɓangaren mai gudu na dogon lokaci don haifar da wanke yashi.
Ƙaddamarwa: Ƙaƙwalwar yashi ya kasu kashi 8 daidai gwargwado ta 8 ƙarfafa haƙarƙari, waɗanda aka haɗa ta tsakiyar rami. Babu sauran goyon baya da sassa na shaye-shaye sai tsakiyar tsakiya. Idan ba za a iya gyara ginshiƙin yashi da Ƙarfafawa ba, ƙaurawar yashi da ramukan iska za su bayyana bayan an zubo. Domin gaba dayan yankin yashi mai girma, an raba shi zuwa sassa takwas. Dole ne ya kasance yana da isasshen ƙarfi da ƙarfi don tabbatar da cewa ba za a lalata tushen yashi ba bayan sakin mold, kuma ba zai lalace ba bayan zubarwa. Nakasawa yana faruwa, don tabbatar da kaurin bango iri ɗaya na simintin. Don haka, mun yi wani ƙashi na musamman na musamman, kuma mun ɗaure shi a kan kashin tushe tare da igiyar samun iska don zana iskar gas daga ainihin kai don tabbatar da ƙarancin yashi lokacin yin ainihin. Kamar yadda aka nuna a hoto na 4.
(4) Akwatin rufewa: Yin la'akari da cewa yana da wahala a tsaftace yashi a cikin rami na ciki na bawul ɗin malam buɗe ido, gabaɗayan ginshiƙan yashi yana fentin fenti guda biyu, an goge Layer na farko da fenti na zirconium na barasa (Digiri na Baume). 45-55), kuma an yi fenti na farko kuma an ƙone shi. Bayan bushewa, fenti na biyu tare da fenti magnesium na tushen barasa (Baume digiri 35-45) don hana simintin gyare-gyare daga mannewa ga yashi da raguwa, wanda ba za a iya tsaftacewa ba. An rataye babban ɓangaren kai a kan bututun ƙarfe na Φ200 na babban tsari na ƙashin ƙashin ƙugu tare da screws M25 guda uku, gyarawa kuma an kulle shi tare da akwatin yashi na sama na sama tare da ƙuƙuka kuma an duba ko kauri na bango na kowane bangare ya kasance daidai.
4. Tsarin narkewa da zubowa
(1) Yi amfani da Benxi low-P, S, Ti high quality-Q14/16# baƙin ƙarfe alade, kuma ƙara shi a wani rabo na 40% ~ 60%; abubuwan gano abubuwa kamar P, S, Ti, Cr, Pb, da dai sauransu ana sarrafa su sosai a cikin ƙarfe mai juzu'i, kuma ba a yarda da tsatsa da mai ba, ƙimar ƙari shine 25% ~ 40%; dole ne a tsaftace cajin da aka dawo ta hanyar fashewar harbi kafin amfani da shi don tabbatar da tsabtar cajin.
(2) Babban bangaren sarrafa bayan tanderun: C: 3.5-3.65%, Si: 2.2% -2.45%, Mn: 0.25% -0.35%, P≤0.05%, S: ≤0.01%, Mg (raguwa): 0.035% ~ 0.05%, a ƙarƙashin yanayin tabbatar da spheroidization, ƙananan iyaka na Mg (raguwa) ya kamata a ɗauka gwargwadon yiwuwa.
(3) Maganin inoculation na Spheroidization: ana amfani da ƙananan-magnesium da ƙananan-ƙananan spheroidizers, kuma adadin ƙarin shine 1.0% ~ 1.2%. Hanyar flushing na al'ada maganin spheroidization, 0.15% na inoculation na lokaci ɗaya an rufe shi akan nodulizer a kasan kunshin, kuma an gama spheroidization. Sa'an nan kuma an ba da kwangilar slag don ƙaddamarwa na biyu na 0.35%, kuma ana gudanar da inoculation na 0.15% yayin zubarwa.
(5) Ana ɗaukar tsarin zubar da ƙananan zafin jiki mai sauri, yawan zafin jiki shine 1320 ° C ~ 1340 ° C, kuma lokacin zubarwa shine 70 ~ 80s. Ba za a iya katse baƙin ƙarfen da aka narkar da shi ba yayin zubarwa, kuma ƙoƙon sprue koyaushe yana cike don hana iskar gas da haɗaɗɗu daga shiga cikin ƙirar ta hanyar mai gudu. rami.
5. Sakamakon gwaji
(1) Gwada ƙarfin juzu'i na toshe gwajin simintin: 485MPa, elongation: 15%, Brinell hardness HB187.
(2) Yawan spheroidization shine 95%, girman graphite shine aji 6, kuma pearlite shine 35%. Ana nuna tsarin ƙarfe na ƙarfe a hoto na 5.
(3) Ba a sami lahani mai rikodin rikodi ba a cikin gano lahani na biyu na UT da MT na mahimman sassa.
(4) Bayyanar yana da laushi da santsi (duba Hoto na 6), ba tare da lahani na simintin gyare-gyare irin su yashi ba, ƙaddamar da slag, rufewar sanyi, da dai sauransu, kauri na bango ya kasance daidai, kuma girman ya dace da bukatun zane.
(6) 20kg/cm2 gwajin matsa lamba na hydraulic bayan aiki bai nuna wani yatsa ba
6. Kammalawa
Dangane da halayen tsarin wannan bawul ɗin malam buɗe ido, an warware matsalar rashin ƙarfi da sauƙi na nakasar babban yashi a tsakiya da kuma tsabtace yashi mai wahala ta hanyar mai da hankali kan ƙirar tsarin aiwatarwa, samarwa da kayyade yashi core yin amfani da suturar tushen zirconium. Saitin ramukan huɗawa yana guje wa yiwuwar pores a cikin simintin gyare-gyare. Daga tsarin kula da cajin tanderun da tsarin mai gudu, ana amfani da allon tace yumbu da kuma fasahar ingate don tabbatar da tsabtar narkakkar ƙarfe. Bayan mahara inoculation jiyya, da metallographic tsarin na simintin gyaran kafa da kuma daban-daban The m yi ya kai daidaitattun bukatun abokan ciniki.
DagaTianjin Tanggu Water-Seal Valve Co., Ltd. Butterfly bawul, gate bawul, Y-strainer, wafer dual farantin duba bawulyi.
Lokacin aikawa: Afrilu-29-2023
