Hakuri da Hakurin Zuba Jari da Aka Bayyana: Makin CT & Jagoran Madaidaicin Dimensional

Me yasa Harshen Haƙuri ke da Muhimmanci wajen yin simintin gyare-gyare

Shagunan injuna suna magana dangane da maki IT (ISO 286) - haƙurin da aka auna cikin ɗaruruwan milimita, wanda aka samu ta hanyar cire kayan aiki tare da tsayayyen kayan aikin shirye-shirye. Kafafu suna magana da yare daban. Ana yin sassan simintin gyare-gyare ta hanyar ƙarfe mai ƙarfi wanda ke ƙarfafawa a cikin gyaggyarawa, kuma bambancin girman su yana gudana ta hanyar daidaiton ƙirar kakin zuma, faɗaɗa harsashi, raguwar gami, da juzu'i.

Ma'auni na kasa da kasa don jurewa simintin simintin gyare-gyare shine ISO 8062 , wanda ke bayyana jerin matakan "haƙuri na simintin gyare-gyare" - maki CT . Ƙarƙashin lambar CT, ƙara ƙarfin haƙuri. Fahimtar inda ɓangaren ku ya faɗi akan wannan sikelin shine ginshiƙin kowane yanke shawara na simintin simintin.

Tsarin Grade na CT a kallo

Makin CT yana ba da ƙungiyar juriya bisa ƙima na fasalin. Matsayin CT iri ɗaya yana ba da damar maɗaukakiyar maɗaukakiyar maɗaukaki akan babban girma fiye da ƙarami. A matsayin bayani mai amfani don simintin saka hannun jari na ƙarfe da ƙarfe:

• CT4-CT5 - mafi kyawun yanayin aiki don ƙananan simintin saka hannun jari (yawanci a ƙarƙashin ~ 50 mm) a cikin tsarin silica sol.
• CT5-CT6 - daidaitaccen kewayon kasuwanci don yawancin simintin saka hannun jari na silica Sol har zuwa ~ 200 mm
• CT6-CT8 - na yau da kullun don simintin aikin gilashin ruwa da girma, mafi hadaddun geometries
• CT8-CT12 - yanki na simintin yashi da mutun simintin gyare-gyare tare da babban daftarin aiki da bambancin layi

Don kwatantawa, girman 100 mm a ƙarƙashin nau'o'i daban-daban yana ba da hoto mai banƙyama: CT4 yana ba da damar kusan ± 0.26 mm, CT5 game da ± 0.36 mm, CT6 game da ± 0.5 mm, da CT9 - siffar simintin yashi mai ma'ana - game da ± 1.5 mm. Wannan shine dalilin da ya sa zaɓin tsari kaɗai, kafin kowane injin, ya siya muku haɓaka sau biyu zuwa huɗu a daidaitaccen simintin simintin.

Abin da A Haƙiƙa Yana Ƙarfafa Haƙuri a Zuba Jari

Abubuwa hudu suna sarrafa inda sashinku ya sauka akan sikelin CT:

1. Daidaitaccen ƙirar kakin zuma. Kowane nau'i na simintin gyare-gyare yana gadar daidaiton tsarin kakin zuma wanda ya samar da shi. Allurar kakin zuma na zamani tare da aluminium ya mutu yana riƙe da alamu zuwa ƴan ɗaruruwan millimita, amma raguwar kakin zuma, zafin jiki, da matsa lamba na allura duk sun ɗan bambanta tsakanin harbe-harbe. Wannan shi ne na farko - kuma mafi girma - mai ba da gudummawa ga bambance-bambancen simintin gyare-gyare, kuma shine dalilin da ya sa ba za a iya rabuwa da ƙarfin girma da ingancin kayan aiki ba.

2. Shell da karfe hali. Harsashi yumbu yana fadada dan kadan yayin harbe-harbe, kuma kowane gami yana raguwa akan ƙarfi - carbon karfe wajen 2%, bakin karfe 2.5-3%. Shrinkage ba daidai ba ne: canje-canjen kauri yana rinjayar sashe, matsayi na simintin gyare-gyare, da kuma yadda injiniyoyi ke ciyarwa. Sassan sassa masu rikitarwa tare da canje-canjen sashe na ba zato ba tsammani ba za su yi raguwa iri ɗaya a kowace hanya ba, kuma ƙwararrun masanan sun rama wannan a cikin ƙirar.

3. Sashe na lissafi. Dogayen sassa na bakin ciki na iya murgudawa yayin cire harsashi ko maganin zafi; ɓangarorin da ke da fasalulluka daban-daban suna tara tsari da bambancin harsashi a faɗin tazara. Siffar da ke da nisan mm 400 daga datum ba za ta taɓa riƙe band ɗin guda ɗaya da na mm 40 ba - ba don kamun kifi ba ne, amma saboda kuskure yana taruwa sama da nisa.

4. Hanyar tsari. Bawoyin gilashin ruwa suna da rahusa amma ƙasa da kwanciyar hankali fiye da harsashi na silica sol. Idan zanen ku ya kira CT5 a ​​fadin allon, kuna ƙayyade silica sol - kuma farashin yana nuna shi. Idan CT7 ya isa da gaske don abubuwan da ba su da mahimmanci, gilashin ruwa na iya lashe zance.

As-Cast vs Machined: Shawarar da ke Ajiye Mafi Kuɗi

Motsa jiki guda ɗaya mafi mahimmanci a cikin simintin simintin gyare-gyare shine rarrabuwar kowane fasalin da ke kan zane zuwa guga uku:

Guga 1 - As-simintin yana da kyau. Filaye marasa aiki, fasalolin sharewa, bayanan martaba. Ƙayyade CT6 as-cast a nan ya wadatar gaba ɗaya. Machining waɗannan fasalulluka sharar gida ce.

Guga 2 - Kamar yadda aka yi tare da bandeji mai sarrafawa. Siffofin da ke haɗuwa tare da sassa masu laushi, gano wuri a hankali, ko ɗaukar hatimi na iya buƙatar mafi kyawun ƙarfin simintin simintin. Kamfanonin kafa za su iya ƙarfafa waɗannan makada tare da keɓancewar ƙirar ƙira, samfurin tushen ma'auni, da zaɓin mashin ɗin shirye-shiryen datum - ba tare da cikakken injina ba.

Guga 3 - Dole ne a sarrafa shi. Ƙunƙarar ƙira, H8/H7 daidai, ramukan zaren, fuskokin gasket, saman kayan hawan kaya. Babu tsarin simintin gyare-gyare da ke isar da IT7 kai tsaye; waɗannan fasalulluka suna samun izinin injin injin na 1.5-3 mm kuma an gama su akan CNC.

Zane-zanen bargo-ƙayyade ± 0.05 mm a ko'ina suna tilasta ginin ya faɗi cikakken aikin injin kowane saman. Zane-zanen da ke da fa'idar guga a hankali yana adana kashi 20-40% na abun cikin injina. Lokacin da muka sake nazarin zane-zane a Ningbo Ruican, wannan motsa jiki shine ƙimar farko da muke ƙarawa - kafin a zubar da kowane ƙarfe.

Lalata, Madaidaici, da Sauran Kiran Geometric

Makin CT sun rufe girman juriya, amma juriya na geometric - flatness, straightness, positional - bin nasu dabaru. Yawan ikon simintin simintin gyare-gyare na 150 mm na simintin saka hannun jari na karfe yana kusa da 0.5-1.0 mm flatness. Idan fuskar hatimi tana buƙatar lebur 0.05 mm, wato aikin injin, cikakken tsayawa. Haƙuri na matsayi akan ƙirar ramin simintin gyare-gyaren ya dogara da ko an jefa ramukan ko an hako su: ramukan simintin suna bin daidaiton kayan aiki (kimanin ± 0.3-0.8 mm matsayi a matsakaicin matsakaici), yayin da ƙirar ƙira ta gaji daidaicin CNC (± 0.05 mm ko mafi kyau). Ƙayyadad da matsananciyar kiran kira a kan ramukan da aka saka a cikin simintin gyare-gyare yana ɗaya daga cikin na yau da kullum - kuma mafi yawan abin da za a iya kaucewa - juriya fiye da ƙayyadaddun bayanai da muke gani.

Yadda Ake Karanta Da'awar Haƙuri na Foundry

Lokacin da mai sayarwa ya ce "mun riƙe CT5," yi tambayoyi uku:

1. A wane girman? CT5 a ​​25 mm ya bambanta da CT5 a ​​300 mm. Nemi band ɗin haƙuri akan ainihin mahimmin girman ku.
2. A kan wane tsari? Silica sol ko gilashin ruwa? Farashin ƙididdiga ya gaya muku, amma zane bai kamata ya yi tsammani ba.
3. Da wace iyawa bayanai? Ƙididdiga wanda ke bin sakamako mai girma akan CMM kuma yana iya faɗi ƙimar Cpk akan fasali masu mahimmanci shine mai ba da kayayyaki daban-daban daga tebur mai iya magana ɗaya. Don ɓangarorin samar da aminci-mahimmanci ko serial samarwa, buƙatar nazarin iyawa akan labaran farko.

Jerin Binciken Haƙuri na Haƙuri don RFQ ɗinku na gaba

• Faɗa tsohowar darajar CT kamar-simintin ɓangarorin (CT5 ko CT6 don silica sol na al'ada ne), sannan a soke kawai inda ake buƙata.
• Yi alama a saman saman da aka ƙera kuma a ayyana tsarin datum - masu aikin injin suna buƙatar datum ɗin simintin maimaitawa don aiki daga.
• Rike adadin maɗaukaki masu mahimmanci ƙarami. Fasaloli goma na gaske masu mahimmanci tare da bin diddigin Cpk sun doke arba'in a hankali "mahimmanci".
• Bada tushen aikin sashin. Sanin cewa bore yana ɗaukar daji yana ba mu damar ba da shawarar haɗakar simintin sarrafa simintin gyare-gyare da kuma wucewar injin injin haske.
• Nemi rahotannin juzu'i na farko tare da ma'aunin ma'auni, ba kawai wucewa/ gazawa ba.

Layin Kasa

Simintin saka hannun jari yana ba da daidaitaccen simintin simintin gyare-gyare wanda ke kawar da yawancin injina - amma kawai lokacin da zane ya bar shi. Masu sayayya waɗanda suka fahimci maki CT, guga fasalinsu tsakanin simintin simintin simintin gyare-gyare da injina, kuma suna tattauna buƙatun aiki a fili tare da kafuwar suna samun sassan da suka dace, akan farashin da ya doke duka sassan injina da ƙarancin ingantattun hanyoyin simintin.

A Ningbo Ruican, muna ƙera silica sol da simintin saka hannun jari na gilashin ruwa tare da kammalawar CNC na cikin gida, kuma muna nazarin kowane zane don haɓaka juriya kafin faɗi - sabis ɗin da aka haɗa tare da RFQ ɗinku. Aiko mana da sashin zanen ku kuma bari mu nuna muku waɗanne fasalolin da za mu iya isar da simintin, da abin da ke ceton ku.

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