Paunonzwa 'metal jekiseni molding masevhisi', vanhu vazhinji vanobva vafunga kuti ingori yemhando yepurasitiki yekuumba nehupfu hwesimbi. Ndiyo nzvimbo yekutanga vanhu kugumburwa. Haisi kukwidziridzwa kubva mupurasitiki jekiseni kuumba; imhuka yakasiyana zvachose ine mitemo yayo, kutemwa nemusoro, uye mavara anotapira. Vimbiso inoshamisa: yakaoma, pedyo-net-shape simbi zvikamu muhuwandu hwepamusoro. Chokwadi chiitiko chakazadzwa netudiki tudiki tunogona kurasa batch rese kana usiri kuona seruzevha. Ndakaona mapurojekiti akawanda achiuya aine tarisiro isingaite nezve kushivirira kana kupera kwepamusoro kunze kwe mold, kukanganwa basa rakakosha rekuimba. Ndipo panoitika mashiripiti chaiwo, nekurwa chaiko.
Iyo Core MIM Maitiro Haisi Bhokisi dema
Ngatizviparadze pasina bhuku rekuverenga. Iwe unotanga ne feedstock, iyo inenge 60% yesimbi poda uye 40% binder nehuwandu. Uku hakusi kungosanganisa; iri homogenization muitiro inoda kuva yakakwana. Chero kusawirirana pano kunozoonekwa gare gare sechisina kana kukanganisa. Isu tinoshanda nezvese kubva 17-4 PH isina tsvina kune iwo anonyengera nickel-based alloys. Iyo jekiseni yekuumba chikamu pachayo inonzwa yakajairwa kune epurasitiki vakomana, asi iwo maparamita ari kusimba. Uri kubata nepamusoro viscosity zvinhu, uye mold dhizaini inofanirwa kuverengera kuderera kwakanyanya panguva yekutevera kusungirira uye kunyura-kazhinji 15-20% mutsara shrinkage. Iwe haugone kungoshandisa dhizaini yepurasitiki mold uye kutarisira kuti ishande.
Ipapo kunouya debinding. Iyi inhanho inononoka, yakakosha apo iwe unobvisa binder system. Kukurumidza, uye unowana mitswe kana mablisters. Isu tinoshandisa musanganiswa we solvent uye thermal debinding kune dzakawanda zvikamu. Mutambo wemoyo murefu. Chikamu chegirini hachina kusimba zvakanyanya panguva ino. Ndinoyeuka imwe purojekiti yehinji yemudziyo wekuvhiya uko takamhanyisa kutenderera kwemhepo. Mativi acho aitaridzika zvakanaka achibuda muchoto, asi panguva yekupisa, akadonha sevarwi vaneta. Mhosva yaive yasara kushushikana kubva pakubviswa kwebhainda zvisina kukwana. Chidzidzo chinodhura chakadzidzwa mubatch rimwe chete.
Sintering ndiyo yekupedzisira metamorphosis. Zvikamu zvinodziiswa muchoto chemuchadenga chinodzorwa — hydrogen, argon, kana vacuum — patembiricha iri pedyo nepanonyungudika simbi. Apa ndipo panosangana zvimedu uye chikamu chinodzikisira. Iyo yekumisikidza, kana sintering tray, imhando yehunyanzvi ivo pachavo. Vanofanira kutsigira chikamu pasina kunamatira pairi kana kukonzera kusiyana kwekupisa. Kune yakakwira-vhoriyamu giya chikamu isu takamhanya, takapedza mavhiki maviri tichingogadzira uye kuyedza seta dzakasiyana kudzivirira kukanganisa pasi pehuremu hwayo patembiricha. Ndiwo aya asina unsexy madeta anoita kana kutyora a simbi jekiseni kuumba mabasa project.
Iko MIM Inoita Sense (Uye Kwaisingaite)
MIM haisi mushonga-zvese. Nzvimbo yayo inotapira yakaoma, diki-kusvika-yepakati mativi esimbi anodiwa muhuwandu kubva ku10,000 kusvika kumamiriyoni pagore. Funga nezvemidziyo yepfuti, mabhuraketi emazino, shaya dzematurusi ekuvhiya, kana masensa emotokari akaoma kunzwisisa. Kana iwe uchida zvimedu zvishanu, enda neCNC machining. Kana uchida washer iri nyore, enda ne stamping. Kukosha kweMIM kubatanidza zvikamu zvakaunganidzwa zvakawanda kuita chimwe chinhu chakasimba. Taive nemutengi aiunganidza kachikiyi kadiki kubva pazvidimbu zvishanu zvakapatsanurwa. Isu takaigadziridza zvakare yeMIM, takaidzika kune chimwe chikamu, uye tikacheka mutengo wavo wegungano ne70%. Ndiko kukunda.
Asi ganhuriro dzokunyama ndedzechokwadi. Nepo maaloyi akaita se316L asina tsvina kana Fe-2Ni ari maMIM masitapu, akanyanya-kabhoni masimbi kana mamwe aruminiyamu alloys anozivikanwa zvakanyanya kuoma. Iwindo re sintering rakanyanya kutetepa. Zvakare, saizi yechikamu chinomanikidza. Nepo tekinoroji ichisundira miganhu, mutemo wakajairwa zvikamu zviri pasi pe250 gramu uye inokodzera muchanza. Kufanana kwemadziro kune imwe hombe. Kamwe-kamwe, shanduko dzakakura muchikamu chemuchinjiko ndiyo nzira yekudzika mamaki panguva yekuumbwa uye kukanganisa mukupisa. Dhizaini yeMIM (DFM) ikurukurirano isingagone kutaurirana inofanirwa kuitika chero chishandiso chisati chatemwa.
Apa ndipo apo kuve nekumashure mune zvese kukanda uye machining kwakakosha, senge nzira yeku Qingdao Qiangsenyuan Technology Co., Ltd. (QSY). Neanopfuura makore makumi matatu mugomba mold uye kukanda mari, ivo vanonzwisisa kuyerera kwesimbi, kusimba, uye maitiro ekupisa padanho rakakosha. Ruzivo irworwo runoturikira zvakananga kugadzirisa MIM sintering nyaya. Kuvaona vachibata simbi jekiseni kuumba mabasa padivi pemoyo wavo Investment casting uye CNC machining basa rinoratidza kunzwisisa kunoshanda kweiyo yese yekugadzira ecosystem. Iwe haugone kungova chitoro cheMIM uri wega; iwe unofanirwa kuziva nguva yekukurudzira imwe nzira kana nzira yekupedzisa chikamu cheMIM nechaizvo machining.
Iyo Post-Process Reality: Haiwanzo Kuitwa Mushure meSintering
Chero ani anokuudza chikamu cheMIM chinobuda muchoto chinopisa chakagadzirira kutakura chiri kurerutsa. Dimensional tolerances anowanzo ± 0.3% kusvika ± 0.5%, izvo zvakanaka, asi kune akakosha maficha semaburi kana mating nzvimbo, iwe kazhinji unoda sekondari maoperation. Ndosaka vazhinji vanopa, kusanganisira QSY, vachibatanidza CNC machining. Chikamu chakacheneswa chingada chiboboro chakakwenenzverwa kusvika dhayamita chaiyo kana kuti shinda yakakoswa. Dambudziko nderekugadzirisa aya anowanzo-akatetepa, akaiswa mativi asina kuapwanya.
Kurapa kwekupisa, kupedzisa kwepamusoro senge plating kana passivation, uye kuongororwa kwemhando zvese chikamu chepakeji. Kune chikamu checobalt-chromium alloy cheindasitiri yezvokurapa, taifanira kugadzira sintering cycle kuti isangane nezviyero zveASTM F75, tobva taita inopisa isostatic pressing (HIP) kurapwa kubvisa chero porosity yakasara, ichiteverwa nekukuya chaiko pazvinzvimbo zvakakosha. The simbi jekiseni kuumba mabasa chaingova chetatu chokutanga rwendo rwacho. Kugona kubata iyi cheni yese pasi pedenga rimwe kunodzivirira kunongedzera zvigunwe kana nyaya dzamuka.
Kudzora kwehunhu ndechimwe chikara. Isu tinoshandisa musanganiswa we statistical process control (SPC) panguva yekuumbwa, kurongedza michina yekuyeresa (CMM) yezvinyorwa zvekutanga, uye mijenya sampling yekuongorora density (kazhinji kuburikidza nenzira yeArchimedes). Metallographic cross-sections ndiyo inofanirwa kusimbisa microstructure. Iyo ine zviwanikwa-yakanyanya, asi ndiyo chete nzira yekubata subsurface kukanganisa kunogona kutungamira mukutadza kwemunda.
Kufambisa iyo Supplier Landscape
Kusarudza a simbi jekiseni kuumba mabasa shamwari haisi yekuwana iyo yakachipa yekushandisa quote. Ndezvekutsvaga kugona. Iwe unofanirwa kubvunza nezve ruzivo rwavo nechinhu chako chaicho. Vanogona kukuratidza mamicrographs ebasa rakapfuura ne17-4 PH muH900 mamiriro? Ndeipi yavo yakajairika sintering furnace atmosphere control capability? Ivo vanobata sei yekutanga-chinyorwa chekuongorora uye kushuma?
Tsvaga mutengesi anobvunza mibvunzo yakawanda sezvavanopindura. Vanofanira kukubikira pane basa rechikamu, mamiriro ekutakura, uye zvinodiwa zvekuzora. Mudiwa akanaka anosundidzira kumashure pane zvekugadzira zvinhu zvinonetsa kuMIM uye kupa zano dzimwe nzira. Ndakaona kuti zvitoro zvine hwaro hwakasimba mune mamwe matekinoroji ekugadzira simbi, senge hunyanzvi hwekukanda kwenguva refu pa QSY, vanowanzova nemaonero akazara uye pragmatic. Ivo havasi kuyedza kumanikidza pegi yega yega muMIM yakatenderedza gomba nekuti ndiyo yega chishandiso chavainacho.
Pakupedzisira, shanya kana uchikwanisa. Ona michina yekuumba, mitsara yekuvhara, mavira ekupisa, uye maCMM. Tarisa kurongeka uye kuchena. MIM inzira inonzwa kusvibiswa. Iyo flake yehupfu hwakasiyana inogona kukanganisa batch. Pasi pechitoro chinokuudza zvakawanda kupfuura chero bhurocha rekutengesa richazombofa.
Kuzviputira: Icho Chishandiso, Kwete Chishamiso
Saka, simbi jekiseni kuumba mabasa vane simba, asi vanoda kuremekedzwa kwemaitiro akaomarara. Haisi nzira yekudimbudzira. Kubudirira kunotsamira pakubatana kwakasimba pakati pemugadziri nemugadziri kubva pazuva rekutanga, kunzwisisa kwakadzama kwesainzi inotambirwa, uye kutarisisa kusingadzoreki pakudzora kwemaitiro. Chinangwa ndechekusimudzira kugona kwayo kugadzira geometrically yakaoma, yakasimba simbi zvikamu zvinobudirira, nepo uchiziva miganhu yayo.
Zvinonakidza kuona kuti indasitiri inoshanduka sei, iine mabinder masisitimu matsva uye nekukurumidza kubvisa maitiro ari kubuda. Asi nheyo huru dzinoramba dziripo. Ndezvekutonga rwendo rwehupfu hwesimbi kuburikidza nekuumbwa, kubvisa binder, uye solid-state sintering muchikamu chakavimbika. Kana ichidzvanya, inopenya mainjiniya. Kana ikakundikana, murwi unodhura zvikuru wehupfu yakasvibiswa. Musiyano unogara uri mukudzika kwechiitiko uye kuda kuita nehunyanzvi hwekuita, kwete chete kupenya kwekutengesa.
