Simintin saka hannun jari na micro yana ba da daidaitattun sassan ƙarfe masu siffar net ɗin ƙasa da gram 50 - galibi kamar haske kamar 0.5 g - tare da jurewa fiye da ± 0.05 mm kuma saman ya ƙare zuwa Ra 1.6 µm. Lokacin da wurin zama na bawul ɗin ku dole ne hatimi a mashaya 420, ko cobalt alloy famfo bututun ƙarfe ya tsira da hawan keken zafin jiki na 800 ° C yayin da yake tsayayya da zaizayar ƙasa daga slurry mai ƙura, simintin saka hannun jari ba abu ne mai dacewa ba. Shi ne kawai tsari wanda ke riƙe da lissafi, tsarin hatsi, da sunadarai a cikin kulle-kulle a kowane yanki.
Mun samar da abubuwan haɗin micro-casts sama da 17,000 tun daga 2019-mafi yawa AMS 5387 cobalt alloy nozzles, T800 na tushen tsakiyar shaft rollers, da bakin karfen famfo famfo a ƙarƙashin 32 mm a cikin mafi tsayi. A cikin kowane tsari, muna ganin gaskiyar iri ɗaya: daidaitaccen simintin saka hannun jari ya kasa kasa 10 g. Mutuncin ƙura yana rushewa. Harkar kakin zuma ya karu sama da kashi 3%. Ceramic harsashi permeability na saukad. Cike da ƙarfe ya zama mara tabbas. Abin da ya sa "micro" ba kawai game da girman ba ne - yana da game da sake sabunta tsarin tsarin duka: ƙirar kakin zuma, tsarin ginin harsashi, dewax kinetics, preheat ramp rates, da vacuum-taimaka zuba iko.
Matakan fasaha guda uku sun raba simintin saka hannun jari na gaskiya daga simintin gyare-gyare na al'ada. Na farko, kayan aikin ƙirar dole ne suyi aiki a ± 1.5 µm maimaitawa-ba ±5 µm ba. Muna amfani da taurarewar ƙarfe na ƙarfe na P20 tare da kogo masu gogewa na lantarki da ingantattun alluran zafin jiki. Na biyu, tsarin harsashi yana buƙatar ginin Layer biyar: riguna biyu na wanki tare da zircon submicron, tsaka-tsakin yadudduka biyu tare da silica da aka haɗa, da suturar tsari ɗaya na ƙarshe tare da rarraba barbashi mai sarrafawa. Na uku, zub da buƙatun narkar da yanayin zafi na ainihin lokacin a cikin ± 3°C — da matakan injin da aka riƙe a 0.08 – 0.12 mbar yayin cika. Tsallake kowane ɗayan waɗannan, kuma za ku sami gungu na porosity kusa da bangon bakin ciki ko ƙofar da ba ta cika ba akan fasali ƙasa da 0.8 mm kauri.
Abokan ciniki sukan tambayi: "Shin ba za mu iya kawai na'urar CNC ba a maimakon haka?" Ga wasu geometries-e. Amma yi la'akari da filogi na cobalt na AMS 5387 tare da bangon 0.6 mm, tashar sanyaya helical na ciki, da filayen rufewa guda uku. Machining yana lalata 82% na albarkatun kasa. Rayuwar kayan aiki ta ragu zuwa sassa 47 a kowace saka carbide. Kuma ragowar damuwa daga milling yana haifar da baka 12 µm a maganin zafi na ƙarshe. Simintin saka hannun jari na ƙaro yana farawa kusa da sifa. Muna amfani da milling 5-axis kawai inda GD&T ya kira shi-kamar fuskar rufewa ko flange mai hawa. Sakamakon? 63% ƙananan farashin kayan abu, 4.2 × lokacin sake zagayowar sauri, da haɗarin sifili na yaɗa micro-crack daga lalacewa-induced subsurface lalacewa.
QINGDAO QIANGSENYUAN TECHNOLOGY CO., LTD. ya gina ƙarfin simintin saka hannun jari a kusa da sassa masu mahimmancin manufa - ba abubuwan jin daɗi na lab ba. Kowane sashi yana jigilar kaya tare da cikakkiyar ganowa: lambar zafi, yawan kakin zuma, ginin ginin harsashi, zub da rikodi, da rahoton CMM da aka yi taswirar ASME Y14.5 GD&T callouts. Muna tabbatar da kwanciyar hankali a cikin yanayin zagayowar zafi guda uku (-40°C zuwa +250°C) kafin sakin. An tabbatar da ingancin saman ta hanyar sassan giciye na SEM-ba kawai dubawar gani ba. Kuma a-muna gwada kowane nau'i na T800 da yawa don rarraba lokaci na cobalt ta amfani da taswirar EDS, saboda rashin daidaituwar gamma-beta rabo kai tsaye yana tasiri rayuwar gajiya kai tsaye a cikin magudanar ruwa.
Simintin saka hannun jari na ƙarami yana aiki mafi kyau idan aka haɗa su tare da horon ƙira. Kauce wa kusurwoyi masu kaifi na ciki—amfani da radiyo ≥0.3 mm. Rike ma'aunin kaurin bango a ƙarƙashin 3:1. Ƙayyade daftarin aiki kawai inda unmolding ya buƙaci shi-0.25° ya isa ga yawancin harsashi na zircon. Kuma kada ku keɓance sifofin bakin ciki: haɗa su zuwa taro tare da fillet ko haƙarƙari waɗanda ke tallafawa ƙarfin harsashi yayin lalata. Muna yin bitar kowane zane don daidaitawa kafin yin magana. A watan da ya gabata, mun ba da alamar 0.45 mm da aka yanke a kan kujerar bawul ɗin matsa lamba wanda zai fashe harsashin yumbu yayin lalatawar tururi. Sake fasalin ya ɗauki sa'o'i biyu. Ajiye abokin ciniki kwanaki 11 da $8,400 a cikin kayan aikin da aka soke.
Wannan ba game da rage tsofaffin matakai ba ne. Yana da game da gina sababbi-Layer ta Layer, micron by micron, lot by lot. Kamar yadda fanfunan mai ke buƙatar matsi mafi girma, yayin da tsarin injin ɗin ke raguwa zuwa cikin injiniyoyin hannu, kuma yayin da cobalt-nickel alloys ke turawa cikin ambulaf ɗin sabis na 900°C, ƙaramin saka hannun jari yana canzawa daga alkuki zuwa larura. QINGDAO QIANGSENYUAN TECHNOLOGY CO., LTD. Yana mai da hankali inda daidaito ya hadu da sakamako: sassan da ba su dace ba kawai-amma aiki, tsira, da maimaitawa. micro zuba jari simintin gyaran kafa fara karami. Ya ƙare inda abin dogara ba zai yiwu ba.
