Ha lienjineri li hloka bokhoni ba fektheri ea ente ea tšepe e nyane bakeng sa likarolo tse ka tlase ho 5 mm ka mamello ea ± 0.01 mm, ha se hangata ba qalang ka patlo ea Google. Ba qala ka prototype e hlōlehileng - cobalt alloy nozzle e ileng ea phatloha nakong ea tlhahlobo ea khatello ea metsi, pompo ea ntlo ea pompo e ileng ea kheloha ka mor'a phekolo ea mocheso, kapa "winch center shaft roller" e neng e apara ka tsela e sa tšoaneng ka mor'a lihora tse 200 maemong a leoatle a tletseng letsoai. Re bone tsena tse tharo - 'me re tsitsitse e' ngoe le e 'ngoe eseng ka ho fetola mamello, empa ka ho nahana hape ka mokhoa o nepahetseng oa ho etsa likarolo tse nyane o koala lekhalo pakeng tsa metallurgy ea phofo le ts'epahalo ea ts'ebetso.
Ho bopa ente ea tšepe e nyane ha se "MIM e nyane" feela - e hloka taolo ea tšepe ka sekhahla sa micron.
'Nete e entsoeng ka ente ea tšepe e nyenyane (μMIM) e fapane le MIM e tloaelehileng ka litsela tse tharo tse sa buisanoeng: kabo ea boholo ba karolo ea phofo e tlameha ho lula tlas'a 5 μm D.90, ho tlosoa ha binder ho hloka profiling ea mocheso oa gradient ho thibela ho phunyeha ha marako a manyenyane (<0.3 limilimithara), 'me sintering lokela ho finyella ≥98.5% theory segokanyipalo ntle le lijo-thollo coarsening. Barekisi ba bangata ba reha likarolo tsa "micro" haeba li le ka tlase ho 10 g - empa likarolo tsa 'nete tsa μMIM li boima ba 0.05-2.5 g' me li na le likarolo tse kang likanale tse pholileng tsa 0.15 mm-diameter, 0.08 mm botenya ba mabota, le li-callout tsa GD&T bakeng sa boemo ba 'nete ka har'a 0.005 mm.
Ke ka lebaka leo khetho ea thepa e se nang boikhethelo - ke qeto ea pele ea boenjiniere. AMS 5387 cobalt alloy e sebetsa moo 316 e sa sebetseng hantle: libakeng tse phahameng tsa lebelo la slurry, ka mocheso oa 450 ° C, tlas'a meroalo ea mokhathala oa cyclic e fetang 10⁷ cycles. Empa sebopeho sa eona se setle se etsa hore e se tšoarele nakong ea debinding. Re sebelisa mekhahlelo e 'meli ea solvent/thermal process e nang le tlhokomeliso ea tahlehelo ea boima ba nako ea nnete - eseng linako tse tsitsitseng - hobane phapang ea batch-to-batch ka sekhahla sa phallo ea li-binder e ama ka kotloloho botšepehi ba karolo e tala.
Khokahano e otlolohileng e rarolla se robehileng ka ntle ho mosebetsi
Liphoso tse ngata tsa μMIM li khutlela morao ho li-handoffs: likepe tsa mofani oa MIM li siiloe likheo; lebenkele la machining le thatafalloa ke ho sebetsana le li-flange tsa 3-mm-diameter; mochini o hloekisang mocheso ha o khone ho pheta tsela e nepahetseng e hlokahalang bakeng sa ho hasana ha carbide ea AMS 5387. Re matha mehato eohle e meraro tlas'a marulelo a tiisitsoeng a ISO 9001 Qingdao - 'me seo se fetola ntho e' ngoe le e 'ngoe.
- CNC machining e sebelisa mabili a 5-axis a nang le lisebelisoa tse phelang le tlhahlobo e ntseng e tsoela pele - e bohlokoa ha u tobane le flange e botenya ba 0.2 mm e nang le ± 0.003 mm flatness.
- Phekolo ea mocheso e kenyelletsa vacuum carburizing bakeng sa likarolo tse thehiloeng ho T800, ka khatello ea karolo ea oksijene e laoloang ho <10⁻⁴ mbar ho thibela oxidation ea bokaholimo ho likhontora tse rarahaneng
- Qetello ea bokaholimo e sebetsa ka electropolishing e nang le sets'oants'o sa 'mapa oa jiometry ea lehae - ha ho likhutlo tse foufetseng, ha ho na likoti tse nyane litseleng tsa phallo.
Ha re na mamello feela. Re na le mamello ea * e sebetsang *: ho hlaka holimo Ra ≤ 0.2 μm lifahlehong tse tiisitsoeng, ho tiea ha micro-hardness ho pholletsa le 0.5 mm cross-sections, le litlaleho tse setseng tsa khatello ea kelello tse netefalitsoeng ka XRD diffraction - eseng feela boima ba Rockwell C.
Moralo-bakeng oa tlhahiso o qala pele faele ea pele ea CAD e bolokoa
Hangata bareki ba botsa: "Na u ka etsa see?" Re araba: "Ee - empa ha feela re ka lokisa radius mona, ra isa sebaka sa heke moo, 'me re bolela boemo bo fapaneng ba ho lla." Mohlala, plug ea cobalt alloy e nang le khoele ea ka hare ea 0.4 mm e ile ea hloleha khafetsa ho fihlela re tloha ho tloha ka hare ho khoele ea post-sinter ho ea ho sebopeho sa likhoele nakong ea machining ea boemo bo botala - ebe re sebelisa nitriding ea mocheso o tlase ho fapana le ho thatafatsa ho tloaelehileng. Phetoho eo e ile ea fokotsa sekhahla sa sekhechana ho tloha ho 37% ho ea ho 1.8%.
Re netefatsa setšoantšo se seng le se seng bakeng sa ho khoneha ha μMIM - ho hlahloba li-angles (bonyane ba 0.5 °), ho qoba likhutlo tse bohale tse ka hare (R ≥ 0.1 mm), ho netefatsa liphetoho tsa lerako la botenya (ha ho > 3: 1 ratio), le ho phalla ha li-binder tsa mohlala ho bolela esale pele melapo ea weld ka matlong a pompo a tšesaane. Haeba GD&T ea hau e hoeletsa boemo ba likarolo tse tharo tse arohaneng ka 2 mm, re tla e tšoaea - 'me re etse tlhahiso ea leano la sebaka se le seng sa datum le fanang ka sephetho se tšoanang sa ts'ebetso ka 40% ea theko e tlase ea tlhahlobo.
Ho tšepahala ha ho lekanyetsoe ho litifikeiti - e hahiloe sebakeng se seng le se seng
Traceability ha se lipampiri. Ke likhoutu tse kentsoeng ka laser karolong e 'ngoe le e' ngoe, li-cert tsa thepa e tala tse tlamelletsoeng ho motho ka mong, 'me litlaleho tsa CMM li bolokoa lilemo tse 15 - eseng feela bakeng sa lihlahlobo, empa kahoo ha litlaleho tsa bareki li apara lihora tse 12,000 tsa ts'ebetso, re ka hula thipa e nepahetseng ea mocheso, rekoto ea li-binder, le tlhahlobo ea optical interfer.ometry ho tloha letsatsing le le leng la tlhahiso.
Feme ea rona ea ho etsa ente ea tšepe e nyane e sebeletsa li-OEM tsa hydraulic Jeremane tse batlang li-cert tsa EN 10204 3.1, likonteraka tsa lebala la oli Texas tse hlokang hore API Q1 e latele, le baqapi ba pompo ba Singapore ba hlokang netefatso ea ho qetela ea ASME BPE. Se ba kopanyang ha se jeokrafi - ke ho hana ho amohela "ho lekana" likarolong tse tiisang, methareng, kapa tse potolohang tlas'a meroalo ea bohlokoa bophelong.
Haeba morero oa hau o latelang oa karolo e nyane o kenyelletsa li-alloys tsa cobalt, mabota a manyane a mamellehang, kapa libaka tse sebetsang tse tlamehang ho pholoha mecha ea litaba e senyang - qala ka boitšoaro ba lintho tse bonahalang, eseng lintlha tsa mochini. Qala ka beng ba ts'ebetso, eseng lebelo la quote. Qala ka molekane ea nkang ho kheloha ho hong le ho hong ho 0.02 mm e le lipatlisiso tsa sesosa, eseng ho tlohela ho mamellana. Ke kamoo ho nepahala ho ka tsejoang esale pele.
