Xa abantu abaninzi besiva 'umatshini wokubumba inaliti yentsimbi', baba nomfanekiso weyunithi enye, i-monolithic-uhlobo lomshicileli we-3D weshishini wesinyithi. Leyo yimbono yokuqala ephosakeleyo. Enyanisweni, yinkqubo, kwaye umatshini ngokwawo, iyunithi yokutofa, yeyona ndawo ibonakalayo. Ibali lokwenyani lenzeka ekulungisweni kwe-feedstock, kwiziko lokubopha, kunye neziko lokutshisa. Ndibone iiprojekthi ezininzi ziphazamisekile ngenxa yokuba zabelwe uhlahlo lwabiwo-mali lwesiphelo esiphezulu umatshini wokubumba inaliti yesinyithi kodwa walibala iinkqubo thermal ezantsi. Umatshini yisirinji echanekileyo; yikhemistri kunye nonyango lobushushu oluyakha ngokwenene inxalenye.
Undoqo weNkqubo: Ngakumbi kunokutofa nje
Masithethe ngeyunithi yokutofa. Ayifani nokubumba inaliti yeplastiki, apho uthi unyibilike kwaye udubule. I-feedstock apha ngumxube we-homogenous yomgubo wesinyithi ocolekileyo kunye ne-polymer binder. I-viscosity iyakhohlisa. Ukuba iprofayili yobushushu bomgqomo womatshini wakho icinyiwe nokuba yi-10°C kwindawo ethile, unokufumana ukwahlukana—ukubopha ukopha kumphezulu okanye ukuzinza komgubo. Ndikhumbula ukubaleka kwezikhokelo zotyando ezincinci, ezintsonkothileyo zentsimbi engatyiwayo. Sasebenzisa umatshini ovela kumvelisi waseJamani, womelele njengayo nantoni na, kodwa sahlala sifumana iziphene zokuhamba kwe-laminar. Umba yayingengoxinzelelo lomatshini okanye amandla okubambisa; yayiyilayini yesikrufu. Ubundlongondlongo kakhulu kwi-feedstock's sensitivity yokucheba. Kwafuneka sisebenze nomthengisi wezinto eziphathekayo ukuze silungise inkqubo yokubopha. Ikhono lomatshini lichazwa ngokuhambelana kwayo nezinto eziphathekayo, kungekhona nje iitoni zayo.
Amandla okubambisa yenye enye. Abantu bathi phithi yiyo. Sifuna umatshini weetoni ezingama-50! Kwiindawo ezininzi ze-MIM, awufane ufune amandla amakhulu kuba ugcwalisa imingxunya emincinci. Ukuchaneka kukumitha, ulawulo lokudubula, kunye nokukwazi ukubamba isantya esingaguqukiyo, esicothayo sokutofa ukunqanda ukujetha. Umngxunya oqhelekileyo kukusebenzisa isantya esikhawulezayo sokutofa, esibamba umoya kwaye senze i-voids ebonakala kuphela emva kokuntywila. Isoftware yolawulo lomatshini kufuneka ivumele oko kuzaliswa kancinane, kumanqanaba amaninzi. Ngumdlalo wefinesse.
Emva koko kukho i-barrel kunye ne-screw wear. Umgubo wesinyithi uyarhawuka. Nokuba kunezinto eziqinisiweyo, ujonge ishedyuli yolondolozo engqongqo kuneeplastiki. Ndiye ndatsala izikrufu emva konyaka ndibaleka 17-4 PH feedstock stainless ebonakala sandblasted. Itshintsha umthamo we-metering zone, echaphazela ukuguquguquka kobunzima bokudubula. Oku akufundi kwincwadana enemifanekiso; Uyifunda ekugawuleni iintsimbi zokudubula rhoqo kunye nokubona i-drift.
I-Make-or-Break: Ukubophelela kunye nokuSintering
Kulapho umlingo kunye neentloko ezibuhlungu ngokwenene. Unokuba nenxalenye eluhlaza ngokugqibeleleyo ukusuka kokulungileyo umatshini wokubumba inaliti yesinyithi, kwaye uyonakalisa ngokupheleleyo kumanyathelo alandelayo. I-Catalytic debinding, i-solvent debinding, i-thermal debinding-nganye ineemfuno zayo zesithando somlilo kwaye iyalela inkqubo yesibophelelo ovaleleke kuyo. Sakhe sazama ukutshintsha ukusuka kwi-feedstock eyaziwayo ukuya kweyona ndlela ifikelelekayo ukunciphisa iindleko zomthengi owenza izinto zompu. Isondlo esitsha sisebenzise isibophelelo esahlukileyo. Umjikelo wethu wokuzibophelela kwiziko, esithe sawenza wagqibelela ukutyhubela iminyaka, wawungalunganga ngoku. Amalungu agqabhukile kwaye aqhekekile ngenxa yokuba isantya sokususa isibophelelo sasikhawuleza kakhulu. Ibhetshi epheleleyo, amawaka aliqela eenxalenye, alahliweyo. Umtshini wenze umsebenzi wawo ngokugqibeleleyo; ulwazi lwenkqubo aluphumelelanga.
Sintering yinguqu yokugqibela. Umoya wesithando somlilo (i-hydrogen, i-nitrogen-argon mix, i-vacuum) ibalulekile. Kwinkampani efana Qingdao Qiangsenyuan Technology Co., Ltd. (QSY), kunye nembali yabo enzulu ekukhupheni nasekusebenzeni ii-alloys ezikhethekileyo, le nto ingundoqo ye-intersection. Baqonda i-metallurgy yobushushu obuphezulu. Ukubaleka i-nickel-based okanye i-cobalt-based superalloys nge-MIM sisilo esahlukileyo kune-standard stainless. Iprofayili yeqondo lobushushu le-sintering, amaxesha okubamba, kunye namazinga okupholisa amisela ngokuthe ngqo iipropathi zokugqibela zoomatshini kunye nokunyamezelana komda. I-Shrinkage iqikeleleka, malunga ne-15-20%, kodwa ayikho isotropic ngokugqibeleleyo. Uphawu olude, olubhityileyo luya kucutheka ngokwahlukileyo kune hub etyebileyo. Uhlawulela loo nto kuyilo lwesixhobo, kodwa ufuna inkqubo ye-sintering ukuba ibe yi-rock-solid ehambelanayo ukuthemba ezo mbuyekezo.
Apha kulapho umsebenzi odityanisiweyo ngokuthe nkqo wenza ingqiqo. Imvelaphi ye-QSY kwi-investment casting kunye ne-CNC machining ibanika inzuzo eyahlukileyo. Baqonda ukwakheka kwe-net-shape kunye nokugqiba ngokuchanekileyo. Inxalenye ye-MIM ihlala iphuma kwi-sintering idinga ukukhanya kwe-CNC-ukugrumba umngxuma wokwenyani, ukucola ubuso bedatum. Ukuba nobo buchwephesha bomatshini ngaphakathi endlini kuthetha ukuba banokuyila inkqubo ye-MIM yokwandisa imeko ye-sintered, besazi kakuhle ukuba iya kugqitywa njani. Yimbono egcweleyo uninzi lweevenkile zokudlala ze-MIM ezingenazo.
Isixhobo: Iqabane Elithuleyo
Akukho ngxoxo yomatshini igqityiweyo ngaphandle kokuthetha malunga nokubumba. Ukusetyenziswa kwe-MIM kukuchaneka okuphezulu, rhoqo kunye noyilo lwe-multi-cavity kula malungu mancinci. Ukungenisa umoya kubalulekile. Ngenxa yokuba i-feedstock ayimanzi ngokwenene, ukukhupha umoya kunzima. Sisebenzise iimolds ezine-vacuum-assisted venting edityaniswe ngqo kwiplaten. Intsimbi yokubumba idinga ukuqina, njenge-H13, kodwa igudiswe ukuze igqibe isibuko. Nakuphi na ukukrwela okuncinci kuya kubangela amanqaku okutsala kwaye kwandise amandla okukhupha, okunokuthi kugqwethe indawo ethambileyo eluhlaza.
Imijelo yokupholisa bobunye ubugcisa obuchuliweyo. Ufuna ukuseta isibophelelo ngokukhawuleza ukunciphisa ixesha lomjikelo, kodwa ukupholisa ngokukhawuleza kunokubangela uxinzelelo. Ndibone izixhobo apho kuye kwafuneka ukuba siqhube amaqondo obushushu ahlukeneyo okupholisa kwiindawo ezahlukeneyo ukulinganisa ukuzaliswa kunye nokupholisa kwenxalenye entsonkothileyo. Iyaphindaphinda. Uqhuba uyilo lwemifuniselo (DOE) kwi umatshini wokubumba inaliti yesinyithi: Lungisa isantya sokunyibilika, isantya sokutofa, ukubamba uxinzelelo, kunye nexesha lokupholisa, emva koko ulinganise indawo eluhlaza kunye nemilinganiselo. Emva koko ulungelelanisa isixhobo, mhlawumbi ukongeza ukuphuphuma kakuhle ukuze ubambe izinto zenqanaba lokugqibela, kwaye uqhube i-DOE kwakhona. Yincoko phakathi kweeparamitha zoomatshini kunye nejiyometri yesixhobo.
I-Real-World Application kunye ne-Material Nuances
Jonga kumashishini: ezonyango, amazinyo, imipu, iinzwa zemoto, i-elektroniki yabathengi. Umthamo wenxalenye uthethelela iindleko eziphezulu zangaphambili zezixhobo kunye nophuhliso lwenkqubo. Usetyenziso oluqhelekileyo lunokuba sisikrufu sethambo lentsimbi engenakutyiwa okanye iblade ye-nickel-alloy turbine blade ye-micro-drone. Ukukhethwa kwezinto eziphathekayo, njengoko kubonisiwe bubuchule be-QSY kunye ne-alloys ekhethekileyo, inkulu. Kodwa nganye izoni eziphathekayo ngokwahlukileyo. I-Titanium i-MIM idinga i-ultra-high vacuum furnace. Ii-alloys ezinzima zeTungsten zineeprothokholi zazo.
Ubuhle beMIM buhlanganisa iindawo ezininzi zibe nye. Sasebenza kwiprojekthi yomatshini wokutofela inqwelo-mafutha—inxalenye eyayidla ngokwenziwa ngamaqhekeza amathathu adityanisiweyo. Siyilwe njengenxalenye ye-MIM enye kwi-316L engenasici. Umceli mngeni wawukufezekisa ukugqiba okufunekayo kumphezulu kwiipaseji zangaphakathi zamafutha ngokuthe ngqo ukusuka kwi-sintering, ukuphepha ukuthunyelwa kwe-post-machining. Kwathatha iinyanga zokulungisa ubungakanani bobungakanani bomgubo kwi-feedstock kunye ne-sintering atmosphere ukunciphisa i-porosity yomhlaba ukuya kwinqanaba elamkelekileyo. Indima yalo matshini yayikukuvelisa indawo eluhlaza engenasiphako nengenasiphako ngokupheleleyo yangaphakathi enokuthi ibe yimingxuma kamva.
Ukungaphumeleli ngumfundisi omkhulu. Kwangoko, sasineprojekthi ye-MIM ye-ceramic (esebenzisa umgaqo ofanayo womatshini). Sayiphatha njengentsimbi. Ayilunganga. Umjikelo wokutshisa we-ceramic binder wawuhluke ngokupheleleyo, kwaye i-sintering shrinkage yayingaphezu kwama-25%. Amalungu awonakele kakhulu. Kusifundise ukuba umatshini liqonga eliguquguqukayo, kodwa ulwazi lwenkqubo-iiresiphi zokubopha kunye ne-sintering-zingqale kwizinto eziphathekayo kwaye azidluliseli. Awunakucinga ubuchwephesha bokuguqulela intsimbi kwi-alumina okanye i-silicon carbide.
Ukudityaniswa kunye nombono wekamva
Ngoko iphi i umatshini wokubumba inaliti yesinyithi uhlala namhlanje? Iya idityaniswa ngakumbi. Oomatshini banamhlanje banenkqubo edityanisiweyo yokubeka iliso, ukulandela iiprofayili zoxinzelelo lokudubula ngexesha lokwenyani kwaye uzithelekise negophe legolide. Ukuba i-drift ifunyenwe, inokulumkisa umsebenzisi ngaphambi kokuba indawo embi yenziwe. Oku kuya kwishishini le-4.0, apho idatha evela kumatshini wokutofa, isithando somlilo esibophelelayo, kunye neziko lokutshisa zonke zinxulunyaniswa nomgangatho wokugqibela.
Kumvelisi onje nge-QSY, ukudityaniswa kwe-MIM ecaleni kokubunjwa kweqokobhe, utyalo-mali, kunye nomatshini we-CNC kudala ipotfoliyo enamandla. Umxhasi unokuza necandelo elintsonkothe kakhulu kumatshini wesintu, linomthamo ophakathi (amaqhekeza ayi-10k-100k ngonyaka), kwaye afuna imathiriyeli yokusebenza okuphezulu. I-MIM iba sisisombululo esifanelekileyo. Bangakwazi ukusingatha lonke uhambo: inxalenye yoyilo lwe-MIM, ukhetho lwe-feedstock, ukuveliswa kwesixhobo, ukubumba, ukubopha, ukuthungatha, kunye nokulungiswa kokugqibela ngokuchanekileyo-konke phantsi kophahla olunye. Oko kulawula umgangatho kwaye kunciphisa ukukhuhlana kwamalungiselelo.
Ekugqibeleni, umatshini uyinto ebalulekileyo, kodwa usisimumu ngaphandle kwenkqubo yendalo engqongileyo yesayensi yezinto, ubunjineli benkqubo yobushushu, kunye nezixhobo ezichanekileyo. Obona buchule abukho ekusebenziseni ushicilelo; kusekwazini ukucwangcisa lonke ikhonkco ukusuka kumgubo ukuya kwindawo yokusebenza. Yiloo nto eyahlula ivenkile yomsebenzi kumnikezeli wezisombululo wenyani. Ufunda ukuhlonipha yonke inkqubo, hayi nje isixhobo esingxolayo phantsi.
