Kev phais lub taub hau MIM
MIM yog ib txoj hauv kev ze-net tsim tau sai heev nyob rau hauv lub xyoo pua 20th. Cov txheej txheem dav dav yog: hmoov ntxiv binder → sib tov → txhaj tshuaj → degreasing → sintering.
Ua ntej yog siv cov polymer tov nrog hmoov, sib tov nyob rau hauv tej yam kev mob nrog txaus liquidity yuav ua tau raws li qhov yuav tsum tau ntawm kev txhaj tshuaj, sib tov thiab pub, qhov thib ob yog xaiv qhov tsim nyog txhaj tshuaj kub, txhaj tshuaj siab thiab txhaj tshuaj ceev cov txheej txheem tsis xws li txhaj tshuaj. molding, thiab ces coj tawm tom qab txhaj tshuaj ntawm billet binder rau sintering, hmoov metallurgical daim ntawv cog lus tsim, Thaum kawg, cov khoom ua tau raws li qhov yuav tsum tau ua.
Cov yam ntxwv ntawm MIM technology
MIM yog ib qho tshiab ze-net txoj kev siv tshuab ntawm cov khoom thiab cov khoom siv, uas ua ke nrog cov txheej txheem yas, polymer chemistry, hmoov metallurgy thev naus laus zis thiab cov khoom siv hlau, thiab lwm yam. Nws muaj cov yam ntxwv hauv qab no:
① Cov khoom tsim los ntawm MIM thev naus laus zis tsis tas yuav tsum tau ua raws li kev ua haujlwm lossis kev ua raws li kev ua haujlwm me me, thiab kev siv cov khoom siv yog siab. Nws belongs rau ze-net txoj kev thev naus laus zis, uas tuaj yeem tsim cov khoom ua haujlwm siab nrog cov duab nyuaj.
② Cov txheej txheem pub mis thiab sintering ntawm cov khoom tuaj yeem simulated los ntawm lub computer, thiab cov txheej txheem tuaj yeem ua kom zoo nyob rau theem pib [1-2] kom tau txais cov qauv tsim zoo tshaj plaws.
③ Nyob rau hauv tus txheej txheem ntawm kev txhaj tshuaj, lub siab ntawm txhua qhov taw tes hauv kab noj hniav yog sib npaug, thiab qhov ceev kuj sib npaug raws li qhov chaw ntawm kev sib xyaw ntawm cov khoom noj. Yuav tsis muaj qhov tseem ceeb heev, uas yooj yim kom ua tiav cov khoom loj loj.
Cov khoom kho mob tsim los ntawm MIM technology
Cov khoom siv kho mob feem ntau yuav tsum muaj kev siv tau zoo, kev pab cuam lub neej ntev, thiab hloov tau yooj yim hauv cov qauv thiab cov qauv tsim
MIM thev naus laus zis tau siv thawj zaug hauv cov khoom siv kho mob thaum xyoo 1980s, thiab tau dhau los ua thaj chaw loj tshaj plaws ntawm MIM kev ua lag luam.
Kev faib ua feem ntawm MIM thev naus laus zis hauv kev lag luam sib txawv hauv North America hauv 2015 [4]. Nws tuaj yeem pom tau tias kev kho mob thiab kho hniav tau dhau los ua qhov tseem ceeb ntawm MIM hauv North America.
Tam sim no, feem ntau MIM cov khoom siv rau kev kho mob siv cov ntaub ntawv stainless hlau, cov khoom tseem ceeb yog 316L thiab 17-4PH; Muaj titanium alloy, magnesium alloy, kub, nyiaj, tantalum, thiab lwm yam. [5].
Cov cuab yeej phais rau kev ua haujlwm
Cov cuab yeej phais mob nrog lub zog siab, tsis muaj kuab paug thiab ntshav kom ua tiav cov txheej txheem tshuaj tua kab mob hnyav, xws li MIM thev naus laus zis tsim kev yooj yim tuaj yeem ua tau raws li feem ntau ntawm kev siv cov cuab yeej phais, tab sis kuj muaj qhov zoo ntawm kev siv thev naus laus zis tib lub sijhawm, tuaj yeem ua tau. txo tus nqi ntawm kev tsim txhua yam ntawm cov khoom hlau, yog maj mam hloov cov tsoos ntau lawm tshuab tau dhau los ua cov txheej txheem tseem ceeb.
FloMet Co., LTD., siv MIM thev naus laus zis, tsim cov hlau tsis muaj steel claw [7] ua los ntawm 17-4pH stainless hlau, nrog qhov ceev ntau dua 7.5g / cm3, uas tuaj yeem siv los tuav cov khoom hauv tib neeg. lub cev thaum phais thiab muaj kev ua haujlwm ntawm forceps. Nws cov qauv tsim yog qhov nyuaj heev thiab yuav tsum muaj qhov raug ntau lawm.
Los ntawm kev siv MIM thev naus laus zis los tsim thiab tom qab ntawd sintering, cov qib siab kam rau ua tiav tuaj yeem ua tiav yam tsis tas yuav tsum tau ua cov txheej txheem txuas ntxiv kom tsis txhob ua rau kev puas tsuaj rau txoj kab ncaj nraim thiab geometry ntawm claw.
Nws yog ib qho nyuaj rau tsim cov khoom no nyuaj stainless hlau claw los ntawm casting los yog machining txoj kev, uas yuav tsum tau ib tug ntev ntau lawm voj voog thiab siab nqi. Siv MIM thev naus laus zis tuaj yeem txuag tau 60 feem pua ntawm cov nqi.
Cov cuab yeej siv phais pov tseg yuav tsum tsim kom muaj cov txheej txheem tsim khoom uas tsis muaj nqi. Smith Hlau Khoom Tuam Txhab siv MIM thev naus laus zis los tsim cov ncej sib dhos [8], uas yog siv rau hauv hom tshiab ntawm cov cuab yeej siv phais pov tseg. Tus nqi tsuas yog 1/4 ~ 1/5 ntawm Swiss CNC tshuab cuab yeej, thiab qhov ceev yog 7.5g / cm3. Lub zog tensile kawg yog 1190MPa, lub zog tawm los yog 1090MPa, qhov elongation yog 6.0 feem pua, thiab qhov siab tshaj plaws hardness yog 33 HRC.
Cov txheej txheem tsim khoom ntawm cov khoom yog: ua ntej, ob qhov 178mm-ntev ncej yog tsim los ntawm MIM tshuab, thiab tom qab ntawd ob qhov chaw yog laser welded, tom qab ntawd tom qab machining thiab kev kho cua sov. Kev txhaj tshuaj peening thiab passivation kuj tseem yuav tsum tau txhawm rau txhawm rau ua tiav cov cai kam rau ua tau zoo.
Hlau microinjection molding
Hlau Micro Injectionmolding (μMIM) yog ib hom kev tsim technology tsim los ntawm IFAM lub koom haum hauv lub teb chaws Yelemees. Nws yog daim ntawv thov organic ntawm MIM thev naus laus zis rau kev npaj ntawm micron qhov chaw.
Feem ntau hais lus, μMIM tuaj yeem siv los tsim ob yam khoom:
① Qhov loj ntawm micron, lub teeb rau ob peb milligrams ntawm qhov chaw;
② Qhov loj me ntawm qhov zoo ib yam li qhov loj ntawm cov tsoos txhaj tshuaj molding ib feem, tab sis cov qauv hauv zos loj mus txog qib micron nrog microstructure ntawm ib feem.
Nyob rau hauv xyoo tas los no, microinjection molding tau dhau los ua kev tshawb fawb hotspot hauv kev txhaj tshuaj molding. Nrog rau kev txhim kho cov tshuab niaj hnub nyob rau hauv cov kev taw qhia ntawm miniaturization, daim ntawv thov ntawm microinjection molding yuav ntau thiab ntau dua [14].
Tam sim no, Karlsruha Research Center tau ua tiav siv μMIM thev naus laus zis rau kev tsim cov khoom me me ntawm cov cuab yeej kho mob [15], xws li spectrometer thiab titration phaj, thiab lwm yam. Cov qauv loj ntawm cov khoom mus txog qib micron, thiab qhov tsawg kawg nkaus phab ntsa thickness yog 50μm. .
Lub suture thauj tog rau nkoj [16], tsim los ntawm German IFAM lub tuam txhab siv μMIM thev naus laus zis rau kev siv phais, tsuas yog qhov loj ntawm lub taub hau sib tw.
Hlau co-txhaj tshuaj molding
Hlau Co Txhaj Moulding (Co-MIM) tau tsim nyob rau xyoo 1990, yog sandwich hmoov txhaj tshuaj molding tshuab.
Cov txheej txheem no yog txhaj ob yam khoom uas muaj cov yam ntxwv sib txawv rau hauv pwm tib lub sijhawm lossis hauv cov khoom siv, uas tuaj yeem ua ke cov khoom siv hlau thiab cov khoom siv nrog cov khoom sib txawv ntawm tib qhov.
Nyob rau hauv txoj kev no, cov tub ntxhais / plhaub cov qauv nrog kev ua haujlwm thiab cov duab ua haujlwm tuaj yeem tau txais yam tsis tas yuav muaj cov txheej txheem tom ntej xws li txheej txheej, kev kho cua sov thiab kev sib dhos ntawm cov khoom. Thaum kawg, cov khoom siv gradient tuaj yeem npaj tau rau hauv ib txoj kev, uas txo cov txheej txheem thiab txo tus nqi.
Co-mim thev naus laus zis muab lub tswv yim tshiab rau kev txhim kho thiab tsim cov khoom siv ua haujlwm. Li Yimin et al. [17] tau npaj txhij cov qauv siv thev naus laus zis tshiab siv cov pob txha sib txuas, cov pob txha densical thiab cov qauv cancellous nyob rau hauv sab nraud pore.
Cov qauv no yog qhov tsim nyog rau kev hloov pauv kev ntxhov siab ntawm cov pob txha implanted thiab cov pob txha nyob ib puag ncig. Lub porosity ntim piv ntawm cov txheej txheem porosity yog nyob rau hauv thaj tsam ntawm 5 feem pua rau 60 feem pua, thiab qhov pore loj tshaj plaws yog 400μm.
3 kev pom
Raws li BCCresearch qhov kev tshawb fawb kev lag luam tsis ntev los no ntawm cov hlau thiab ceramic txhaj tshuaj molding, lub ntiaj teb kev lag luam rau hlau thiab ceramic txhaj tshuaj molding Cheebtsam yog kwv yees tias yuav loj hlob los ntawm $ 1.5 nphom hauv 2012 mus txog ze li $ 2.9 nphom hauv 2018, sawv cev rau qhov nruab nrab txhua xyoo kev loj hlob ntawm 11.4 feem pua.
Nyob rau tib lub sijhawm, nrog kev poob ntawm kev muag tsheb, MIM thev naus laus zis yuav muaj ntau dua rau hauv kev kho mob, aerospace, electronics thiab lwm yam.
Hauv nws daim ntawv qhia tshiab rau European P / M kev lag luam, European P / M Association tau hais tias kev lag luam kho mob yog ib feem tseem ceeb ntawm kev txhaj tshuaj molding kev lag luam.
Nrog rau kev nthuav dav ntawm kev lag luam tas mus li, daim ntawv thov ntawm MIM thev naus laus zis hauv kev kho mob yuav muaj ntau dua thiab ntau qhov tob, thiab ntau yam khoom siv tshiab thiab cov txheej txheem tshiab raws li MIM thev naus laus zis yuav raug tsim los tas li.
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