Uma uzwa 'ingxenye yokuphonswa kwensimbi', izingqondo eziningi zigxuma ziqonde esimweni sokugcina—ijiyomethri emdwebeni. Lowo umbono oyiphutha wokuqala. Ingxenye yangempela ayikona nje ukuma; yiwo wonke umlando wensimbi encibilikisiwe, ukuziphatha kwesikhunta, izingcindezi zokupholisa ezikhiyelwe ngaphakathi, nomsebenzi wezandla ovame ukunganakwa oza ngemva kokunyakaziswa. Iwushintsho olubalulekile olunenkumbulo, hhayi ukukopisha okulula okuvela ku-CAD.
Umdlalo Weshell: Ngaphezu Kwesihlabathi Nje
Thatha i-shell mold casting, enye yezindlela zethu eziyinhloko ku-QSY. Abantu bacabanga ukuthi imayelana nokuqedwa okungcono, futhi kunjalo-sikhuluma ngo-Ra 6.3 kuya ku-12.5 μm ngqo ngaphandle kwesikhunta. Kodwa i-nuance yangempela isekugoqekeni kwesihlabathi esiboshwe nge-resin. Okwe-complex steel casting ingxenye ngamashaneli angaphakathi noma izingxenye ezinezindonga ezincane, uma lelogobolondo lingakhiqizi kahle ngesikhathi sokupholisa, uthola izinyembezi ezishisayo. Hhayi imifantu oyibona ngokushesha, kodwa okuhle, ubuthakathaka bezinwele obubonakala kuphela ngaphansi kokuhlolwa kwengcindezi noma ukwenziwa ngomshini. Lokhu sikufunde kabuhlungu eminyakeni edlule ochungechungeni lwezindlu zamaphampu. Ubukhulu obuphelele, isiphetho esihle, kodwa izinga lokuhluleka elingu-30% ekuhlolweni kwe-hydro-test. Umlandu? Ukwakhiwa kwegobolondo bekuqine kakhulu ekuncipheni kokuqina kwensimbi ye-low-carbon steel. Bekufanele sishayele emuva okuqukethwe kwe-resin kulowo msebenzi othile, sidele kancane amandla esikhunta sokuqala ukuze sigoqeke kangcono. Akukaze kube nesilungiselelo esisodwa esilingana konke.
Futhi i-gating system yesikhunta segobolondo iyisilwane esihlukile. Ngenxa yokuthi isikhunta sincane futhi sinembile, insimbi igeleza ngokushesha, iphole ngokushesha. Awukwazi ukusebenzisa izibalo zesikhuphukeli esifanayo njengoba ubungasebenzisa isikhunta esikhulu sesihlabathi esiluhlaza. Sivame ukusebenzisa izikhuphukeli ezincane, eziningi kakhulu ezibekwe eduze nezingxenye eziwugqinsi. Ibukeka incane incwadi yokufunda, kodwa iyasebenza. Umgomo uwukondla ukuncipha ngaphandle kokudala izikhungo zokushisa ezinkulu eziba yizindawo zokuhlukanisa. Kwesinye isikhathi, isisombululo esihle kakhulu sesoftware yokulingisa sidinga i-pragmatic, i-tweak embi esitezi sokuqala.
Ukukhetha okubalulekile lapha nakho kubalulekile. Ukubumba igobolondo kusebenza kahle nge-carbon nezinsimbi ze-alloy ephansi. Kodwa uma singena kwamanye amamaki anamandla, acime futhi athukuthele, ukupholisa okusheshayo okuhambisana negobolondo elincanyana kungaholela ebukhuni obuphakeme kunobufunwa ezindaweni ezizacile, okwenza umshini olandelayo ube yiphupho elibi. Kufanele ucabangele i-as-cast microstructure kusukela ekuqaleni, ngezinye izikhathi uze ulungise ukwakheka kwensimbi kancane ngesigayo ukuze unxephezele umjikelezo wethu wokushisa othize. Kuyinto ingxoxo, hhayi nje umyalelo.
Ukufakwa Kwezimali Zotshalomali: Ukunemba Ngezindleko (Zobunzima)
Ukutshala imali, noma i-wax elahlekile, yilapho uthola khona lezo zimangaliso ze-net-shape. Ukubekezelela phakathi kwamayintshi angu-±0.005 iyintshi kungenzeka. Kodwa inkulumo ethi kungenzeka yenza umsebenzi omningi. Inqubo yokujova iphethini ye-wax ngokwayo ingenisa okuguquguqukayo-izinga lokushisa lomjovo, ingcindezi, izinga lokushisa lokufa. Ukushintshashintsha kwamadigri ambalwa kungashintsha ukushwabana kwe-wax, okusakazeka ngokuqondile egobolondweni le-ceramic, futhi ekugcineni kube yinsimbi. Sake sachitha amasonto amabili sijaha i-dimensional drift engxenyeni yevalvu yensimbi engagqwali. Yonke into eyayisenqubeni yayimi ngomumo. Ekugcineni, sabheka isimo sezulu. Kwakuyisonto lasehlobo elinomswakama. Amaphethini we-wax ayemunca umswakama ovela emoyeni phakathi komjovo nokuhlanganiswa, ukuvuvukala kancane kancane. Ukulungisa? Isiteji esilawulwa yisimo sezulu sezihlahla ze-wax. Imininingwane emincane, engeyona eyobuchwepheshe enemiphumela emikhulu yobuchwepheshe.
Inqubo yokwakha amagobolondo ekulingiseni utshalomali iwubuciko bezendlalelo. Idiphu ngayinye ye-slurry, isicelo ngasinye se-sand stucco, ithinta ukungena kwegobolondo lokugcina namandla. Ingeneka kakhulu, futhi insimbi ingase ingene, ibangele indawo emangelengele. Iminyene kakhulu, futhi uzibeka engcupheni yokuqhekeka kwegobolondo ngesikhathi sokushiswa noma ukuthululwa kwezinga lokushisa eliphezulu. Okokugxekayo steel casting ingxenye njenge-turbine blade noma ingxenye yokufakelwa kwezokwelapha, singase sisebenzise into ehlukile ephikisayo yejazi eliyinhloko (lobuso)—mhlawumbe i-zirconia esikhundleni se-silica—ukuthola ukungangeni kwamakhemikhali okungcono ngokumelene nengxubevange yensimbi esebenzayo. Lokhu akukho encwajaneni evamile; yakhiwe kusukela eminyakeni yokuzama nephutha, kanye nezinqwaba ezimbalwa ezibizayo.
Bese kuba ne-dewaxing. I-autoclave ye-Steam ivamile, kodwa kumaqoqo amakhulu noma ayinkimbinkimbi, ukudubula kwe-flash kuyasetshenziswa. Yenza lesi sinyathelo sibe singalungile, futhi igobolondo liyaqhekeka ku-wax enwebekayo ebanjiwe. Igobolondo eliqhekekile alisho njalo ukuvuza kwensimbi okubonakalayo; ngezinye izikhathi kuvele kubangele amaphiko noma imithambo endaweni yokuphonsa. Ungase ungayiboni kuze kube ngemva kokuba i-ceramic ikhishwe. Yingakho amalogi okulawula inqubo yawo yonke iqoqo eyigolide. Udinga ukulandelela emuva. Ingabe ijika lokucindezela kwe-autoclave lalivamile ngalolo suku? Ingabe izinga lokushisa leqoqo ngaphambi kokukhishwa kwewax lalihambisana? Umsebenzi wabaseshi.
CNC Machining: Lapho Ukusakaza Kuvela Ngempela
Yilapho ukulingisa kwetiyori kuhlangana khona neqiniso elinonya. A steel casting ingxenye akuyona ibhulokhi efanayo yempahla ye-billet. Isikali sakho sokuqala sikutshela konke. Umsindo wethuluzi, umbala we-chip, indlela uketshezi lokusika olugeleza ngayo. Sisebenzisa isigaba sethu semishini ye-CNC endlini ngokunembile kule loop yempendulo. Awukwazi ukuhlukanisa ukusakaza kusuka kumishini uma ufuna ukuvumelana.
Inselele yokuqala ukusungulwa kwedatha. Uwathathaphi amaziro akho endaweni emagebhugebhu, efana ne-cast? Sivamise ukuphonsa amaphedi amancane, aphakanyisiwe ezindaweni ezingabalulekile ikakhulukazi kuma-datum omshini. Balungiswa ngomshini esinyathelweni sokugcina. Uma ungakuhleleli lokhu ekwakhiweni kwephethini, uphoqa umakhi ukuthi athole ingxenye, eyethula ukuhlukahluka. Ngibone izingxenye zilahliwe ngoba ukubunjwa kushintshile kancane esikhunjeni, futhi ngaphandle kwephedi yedatha ethembekile, uchwepheshe wemishini wabhoboza izimbobo ezazizophrintwa ngokobuchwepheshe kodwa zanikeza ingxenye ingasebenzi.
Amaphutha afihliwe aziveza lapha. I-porosity encane yokuncipha, engabonakali ku-X-ray uma incane, izobangela ithuluzi ukuthi lixoxe noma liphuke ngisho nalapho lifika kuleyo ndawo. Indawo eqinile evela ekupholiseni okusheshayo izoguga ukufaka i-carbide ngemizuzwana. Omashini bethu bangabahloli bokugcina bekhwalithi. Babhala lokhu kuhlangana: Ithuluzi ligqoka ngokweqile ebusweni B, sola ukuhlukahluka kwendawo. Leyo log ibuyela emuva ku-Foundry metallurgist. Mhlawumbe sidinga ukulungisa izinga lokushisa elithelayo noma ukubekwa kwesikhuphukeli saleyo ndawo. Le ndlela edidiyelwe ku-QSY iyona eguqula ukusakaza okuhle kube ingxenye enokwethenjelwa, eshintshwayo. Akuwona umlingo; kungukuxhumana, okubhakwe emsebenzini weminyaka engama-30.
Futhi ukulungisa. Ukwenza umshini wokulingisa akufani nokwenza insimbi yokushisela. Awukwazi ukuphoqa phansi ngamandla budedengu. Abalingisi banengcindezi esele. Ukugoqa ngokweqile kungahlanekezela ingxenye, ngakho-ke uyayifaka isikwele ukuze iphume ekubekezeleni uma isikhishiwe. Sisebenzisa i-anneal eqeda ukucindezeleka ngaphambi komshini wezingxenye ezibucayi, futhi siklama izinto ezibambelela ngokuqinile kodwa ezivumela ukunyakaza kwemvelo kancane. Kwesinye isikhathi, uthatha iphasi elimangelengele, uxegise ama-clamp, uyeke akhululeke, aphinde enze i-torque, bese uya e-finishing pass. Kuthatha isikhathi esiningi, kodwa kusindisa ingxenye.
I-Material Maze: Insimbi Akuyona Nje Insimbi
Ukucacisa insimbi akusho lutho. Ngabe sikhuluma nge-1020 low carbon? 4340 ingxubevange yensimbi? 17-4 PH engenasici? Noma izindawo ezingavamile ze-duplex stainless noma i-cobalt-based alloys njenge-Stellite 6? Ngamunye uziphatha njengesilwane esihlukile endaweni etholakala kuyo. I steel casting ingxenye Ipuleti eligqoke ipuleti elinodaka kungxube ye-cobalt-chromium cishe alinalutho elifanayo, elihlakaniphile ngokwenqubo, elinegiya le-carbon steel elingu-1045 elingenalutho.
Izinsimbi zekhabhoni ziyathethelela, kodwa zijwayele ukuncipha futhi zidinga ukudla okuqinile. Izinsimbi ezine-alloy ephansi njenge-4140 zinokuqina okungcono, okuhle kakhulu ezindaweni zokugcina kodwa kungaholela ekuqhekekeni ngesikhathi sokupholisa uma umklamo wesikhunta uqine kakhulu. Izinsimbi ezingenasici ze-Austenitic (304, 316) zinezinga eliphezulu lokushwabana—cishe eliphindwe kabili kunelensimbi ye-carbon—futhi zivame ukudabuka ngokushisa. Amasistimu awo wokugenca adinga ukuklanywa ukuze kuncishiswe izingqinamba zokushisa. Izinga lokushisa lokuthela liqinile; kushisa kakhulu, futhi uthola ukuhlukaniswa okubi kanye nezinhlamvu ezinkulu; kupholile kakhulu, futhi inkungu iyagijima noma ivale abandayo.
Bese uba namabanga aqinisa imvula njengo-17-4 PH. Izakhiwo ezimangalisayo zokugcina, kodwa inqubo yokulingisa kufanele ihlanzeke ngokucophelela ukuze kugwenywe ukuhlanganisa okuba izinto ezigxilisa ingqondo. Futhi ukwelashwa okushisa ngemva komshini akuxoxiswana; awutholi ama-specs ngaphandle kwayo. Sivame ukwenza ukwelashwa kwesixazululo (Isimo A) ngemva komshini onzima, bese kuba umshini wokugcina, bese kuba ukwelashwa kokuguga. Kungumdanso wemijikelezo yokushisa nokususwa kwezinto. Ukukwenza kungalungile kusho ingxenye ekala okulungile kodwa ezohluleka ngaphambi kwesikhathi ensimini. Okuhlangenwe nakho kwethu ngama-alloys akhethekile phakathi namashumi eminyaka kusho ukuthi sinalezi zimiso-ezivame ukuthuthukiswa ngokwezifiso ukuze kusetshenziswe iklayenti elithile—kuze kufike kusigqi.
Ukwehluleka Njengothisha: I-Scrap Yard Chronicles
Awufundi ekuthululeni okuphelele. Ufunda kwabahamba kabi. Ekuqaleni kwesikhathi sami ngilapha, saba ne-oda labakaki bensimbi abakhulu, abajiyile—izimiso ezifanayo ziyasebenza nasensimbini. Baqhubeka nokuqhekeka endaweni yewebhu ngemuva kokwelashwa okushisa. Ama-castings amahle, bese kuba yi-ping - ukuqhekeka. Sisole umjikelezo wokuphatha ukushisa ekuqaleni. Ngemva kokuhlaziywa kwe-metallurgical, iphutha laliku-casting ngokwako: i-micro-shrinkage porosity esebenza njenge-crack initiator. Izikhuphukeli zazinkulu ngokwanele, kodwa zazibekwe ngokungalungile. Babedla phezulu kwesigaba, kodwa i-porosity yayenzeka endaweni eshisayo eshisayo lapho kuhlangana khona ukulingisa okugejiwe. Kwadingeka sengeze ukugodola okuncane, kwangaphandle—ucezu lwethusi olufakwe odongeni lwesikhunta—ukuze siphoqelele lowo mbuthano ukuba uqine kuqala. Inkinga ixazululiwe. Manje, kunoma iyiphi ijiyomethri ewugqinsi, ephambanayo, sicabanga ngamakhaza ngokushesha njengoba sicabanga ngezikhuphukeli.
Enye i-classic: i-misruns ezingxenyeni ezincane. Umdwebo udinga udonga oluyi-3mm endaweni ethile. Uyathela, futhi leso sigaba asiphelele. Impendulo elula ukwandisa izinga lokushisa elithela. Kodwa lokho kungabangela ezinye izinkinga ezifana nokushiswa kwesihlabathi noma izinhlamvu ezinkulu. Ngezinye izikhathi impendulo engcono iwukuba ukwandisa izinga lokushisa lesikhunta sendawo ngokubeka isigaba eduze kwesango noma ngisho nokusebenzisa imikhono ye-exothermic ezungeze izingxenye ezithile zesistimu yokugenca ukuze ugcine uketshezi lwensimbi lude kuleyo ndlela ethile. Imayelana nokuqondisa ukushisa, hhayi nje ukwengeza okwengeziwe emhlabeni jikelele.
Lezi zifundo azikho ezincwadini eziningi. Abhalwe ngezindleko zezinsimbi ezilahliwe kanye nokulethwa okubambezelekile. Zikuphoqa ukuba ubheke sonke isimiso—iphethini, isikhunta, insimbi, izinga lokupholisa, ukunyakaziswa, ukuhlanza, ukukhanda—njengenqubo eyodwa exhumene. Ushintsho esinyathelweni sokuqala luya esinyathelweni seshumi. Lokho kuwumsebenzi wangempela wokwenza a steel casting ingxenye. Akulona uchungechunge lwemisebenzi ehlukene; kuwuguquko oluqhubekayo ozama ukwelusa ufinyelele esiphethweni esiyimpumelelo. Futhi ngezinye izinsuku, insimbi inemibono yayo. Kufanele nje ulalelisise ngokuzayo.
