Paunonzwa 'chaizvo yakarasika wax investment casting', vazhinji vanofunga kuti ndezvekugadzira zvimiro zvakaomarara. Ndizvo zviri pamusoro. Iyo chaiyo nyaya iri mukurwira kutendeka kwedimensional, kurwa kweceramic shell kukanganisa, uye kunogara kutaurirana pakati pearoy maitiro uye kushushikana kwekupisa. Haasi mashiripiti; iketani yezvibvumirano zvinodzorwa.
Mutambo WeShell: Ipo Precision Yahwina kana Yakarasika
Wese munhu anotarisa pamusoro peiyo wakisi, uye chokwadi, jekiseni rakanaka ndiko kutanga. Asi kuvaka shell? Ndiko chirevo chinyararire. Ndakaona zvitoro zvichidira mari mune yakakwira-resolution 3D yakadhindwa mapatani chete kuti irasikirwe yese iyo yekumucheto tsanangudzo mune yekutanga dip jasi. Iyo slurry viscosity, iyo stucco saizi yezviyo uye morphology - ita izvi zvisiri izvo, uye iwe unobika mukukanganisa kubva pazuva rekutanga. Goko haringori mold; ndiyo corset yemaitiro panguva yekudira uye chipingamupinyi panguva yekutonhora. Kana kuwedzera kwayo kwekushisa kusina hukama hunofungidzirwa nesimbi yako, uri kudzingirira muswe wako pane kushivirira.
Tora gomba rakajairwa: kufungidzira goko rakakora nguva dzose zviri nani pakugadzikana kwedimensional. Kune inorema-chikamu simbi yekukanda, pamwe. Asi kune yakatetepa-yakakomberedzwa aerospace chikamu mune nickel-based superalloy, goko rakanyanyisa kusimba rinogona kukwevera kupisa kunopisa sezvo richirambidza kudonha. Unoda goko rakasimba zvakakwana kubata simbi, asi ine yakakwana 'kupa' patembiricha chaiyo. Ndiko uko ma proprietary binder masisitimu uye akaturikidzana stucco application kubva kune vane ruzivo vakawana mutsauko. Kunzwa uye ruzivo, kwete chete pepa rakatsanangurwa.
Ini ndinorangarira purojekiti yeturbine sensor yedzimba, uko iyo spec yakadana ± 0.1mm kushivirira pane yemukati bore. Wakisi yakanga yakakwana. Takashandisa jasi rejasi rezirconia. Kutanga kudira kwaingogara kwakapinda pa +0.15mm. Nyaya yacho? Iro jasi rechiso raive rakanyanyisa kuita neiyo superalloy, richigadzira yakakora-kupfuura-yaitarisirwa reaction layer iyo yakanyatso shandura saizi yegomba. Isu takachinjira kune yakasanganiswa silica-based prime slurry-ishoma kuita, yakawanda inert barriers-uye takadzokera mukushivirira. The precision yakarasika wax investment kukanda process izere neaya mamicro-interaction.
Alloy Behaviour: Iyo isingafungidzike Partner
Kutaura nezve alloys, apa ndipo apo ruzivo rwegeneric runokundikana. Precision investment casting of 304 Stainless inyika kunze kwekuzviita necobalt-based alloy seStellite 6 kana nickel-based one seInconel 718. Kuyerera kwavo, kuderera kwezvikonzero, uye kuchengetedza kupisa kwakasiyana zvakasiyana. Iwe haugone kushandisa yakafanana geting uye kusimuka huzivi.
718, semuenzaniso, ine iyo yakakura yechando. Inoda kuumba micro-porosity kana iwe ukasadzora kusimba kwekutungamira zvine hukasha. Takadzidza izvi nenzira yakaoma pabasa rekutanga rebhuraketi reinjini. Yakanaka kupedzwa kwepamusoro, yakapfuura X-ray, asi yakakundikana mukuyedzwa kwekuneta. Dambudziko rakanga rave roga kune imwe nhanho isina kupihwa chikafu. Mhinduro yakanga isiri kungowedzera mamwe simbi (mushonga mukuru); chaive chekuisa patsva magedhi kuti agadzire tembiricha inofambira mberi. Isu taifanira kunge takafunga kumashure kubva kune yakasimba kusvika kune yemvura kudururwa.
Ndiko kusaka nhoroondo yezvinhu zvekutanga ichikosha. Shop like Qingdao Qiangsenyuan Technology (QSY), iyo inotaura makumi emakore ane alloys anokosha, haisi kungonyora zvinyorwa. Ivo vari kunongedzera kune yakaunganidzwa dhatabhesi yekudira tembiricha, shell pre-heat temps, uye kutonhora mapuroteni emhuri yega yega. Iyo ndangariro yesangano ndiyo inodzivirira iyo inodhura yekuedza-uye-kukanganisa pamapurojekiti matsva.
The Machining Handshake: As-Cast vs. Finished
Hapana chikamu chiri 'chaizvo' chakananga kunze kwegoko. Pane nguva dzose machining allowance. Unyanzvi chaihwo huri kuhudukupisa. Chinangwa ndechekuendesa kukanda kwakagadzikana, kuine kushoma kwasara kushushikana, kuitira kuti kana ichinge yarova CNC muchina, haifambe zvisingaite sezvaunocheka mauri.
Ndakaita nharo nevagadziri vanotsanangura reza-yakaonda mvumo kwese kwese, senge 0.5mm. Ndiyo fantasy kune akawanda geometries. Inoisa kumanikidza kusingagoneke pakukanda uye kazhinji kunotungamira kune zvimedu panguva yekugadzira apo chishandiso chinongotsvoda nzvimbo yakachinjika zvishoma. Imwe nzira inoshanda ndeye yekubatana: tsvaga iyo yakakosha datum maficha uye yekuisa chisimbiso nzvimbo. Bata kushivirira kwakasimba uye kupedzisa kwakanaka kune avo vari mukukanda maitiro (dzimwe nguva kunyange net-shape), uye bvumidza yakawedzera kubvumidzwa pamavhoriyamu asina-akakosha. Apa ndipo panopenya zvivako zvakabatanidzwa. QSY modhi yekupa ese ari maviri Investment casting uye CNC machining pasi pedenga rimwe zvinoreva kuti loop yemhinduro ipfupi. Chikwata chekugadzira chinogona kuudza iyo yekutanga, Hei, isu tiri kuona isingachinjiki nzvimbo yakaoma pane iyi flange, uye ivo vanogona kuitsvaga ichidzokera kune yemuno kutonhora nyaya muforoma.
Isu takambove nemuviri wevharuvhu uko ma-as-cast tambo mabhosi aive mukati meiyo spec, asi panguva yekudzvanya, chishandiso chaigara chichidzungaira. Mupari wemhosva? Kwete kusarongeka kwedimensional, asi mashoma macro-porosity masumbu akange asina kukora zvakakwana kuratidza paX-ray asi akachinja simba rekucheka. Iyo gadziriso yaive kugadzirisa kusimuka kwenzvimbo kuti ivandudze kutungamira kusimba kune avo maboss. Yakanga iri mhinduro yekukanda kudambudziko remachining.
Iyo Tooling Mindset: Digital kune Yemuviri
Mafambiro eindasitiri kuenda ku3D akadhindwa wakisi kana resin mapatani ishanduko, asi haina kunzwisiswa. Izvo zvakanakisa kune prototypes uye yakaoma yemukati cores. Pakugadzirwa kwevhoriyamu, simbi yechinyakare yekushandisa jekiseni rewakisi ichiri mambo pakuenderana uye kupera kwepamusoro. Pfungwa iri kusarudza nzira chaiyo.
Iyo tambo yedhijitari yakakosha, zvakadaro. Yakakwana CAD modhi hairevi chinhu kana mugadziri wemidziyo akasaverengera shrinkage zvinhu nenzira kwayo. Uye haisi yunifomu muzana. Iyo anisotropic-yakasiyana mumatemo akasiyana zvichienderana nechikamu geometry uye kuzvidzora kubva kugoko. Vagadziri vakanaka vanoshandisa zvakagadziridzwa shrinkage zvinhu, kazhinji kubva kune yavo nhoroondo data pane akafanana maumbirwo uye alloys. Ivo vanovaka muripo mukushandisa kubva pakutanga. Iyi pre-emptive kugadzirisa chiratidzo chechokwadi kunyatsorasika wakisi shanda.
Ndinoyeuka ndichiongorora mutengesi wenhevedzano yemapombi epombi. Sampuli dzemumwe mutengesi dzaive dzakanaka dzeaerodynamic asi dzakakundikana kuyedzwa kuyerera. Isu takavapa mepu uye takawana iwo vane profiles aive akasarudzika-pateni yaive yakayerwa nechinhu chimwe chete, yunifomu shrinkage factor. Mumwe mutengesi, uyo akanga aita basa rakafanana munguva yakapfuura, akashandisa chikero chinoshanduka, achikobvura pateni zvishoma mugwara rekumanikidzira kwepakati hub. Kudhirowa kwavo kunoitwa zvinoenderana. Ndiwo zivo yakavanzwa.
Hunhu inzira, Kwete Kuongorora
Pakupedzisira, kunyatsoita hakuna kusimbiswa pakupedzisira; yakavakirwa mukati pamatanho ese. Inzvimbo inodzorwa yekamuri yewakisi (tembiricha, mwando). Ndiko kuongorora zvine hungwaru kwemacluster assemblies isati yaiswa shelling. Ndiyo yakanyorwa kupfura curve ye autoclave yekubvisa waxing uye choto chekupisa. Kutsauka mutembiricha yekupfura kwegoko kunogona kushandura kugona kwayo uye simba, zvichitungamira kune mistruns kana kuputika kwegoko panguva yekudira.
Iyo post-casting maitiro ane basa zvakare. Unocheka sei zvikamu zvemuti? Abrasive vhiri rinogona kukonzera kushushikana uye micro-cracks kana isina kuitwa nemazvo. Kurapa kwekupisa ndeimwe nzvimbo yezvimbambaira. Solution kurapa kwakaomarara kukanda kukwenenzvera alloy zvivakwa pasina kukonzeresa warpage kana sintering sikero iyo inoparadza nzvimbo ndeye yakatetepa chiyero.
Maonero akazara aya ndiwo anoparadzanisa mupi wechikamu kubva kumugadziri wekugadzira. Kana kambani inoda QSY inosimbisa makore makumi matatu ekukandira uye kugadzira, ndiyo kodhi yekuve wakararama kuburikidza nematambudziko aya akabatana. Vanogona kunge vaona kuti shanduko yejecha reganda inokanganisa machinability, kana kuti tweak yekupisa kurapwa inogona kuchengetedza batch yezvikamu zvine marginal dimensions. Ndiwo magadzirirwo enyika chaiyo precision yakarasika wax investment kukanda-yakadzika, dzimwe nguva yakashata, inogara yakadzama hunyanzvi hwekubatanidza zana dzakasiyana kurova rimwe chete, risingaregereri spec sheet. Hazvisi zve wakisi chete.
