Ukukhishwa kwesihlabathi samandla adonsela phansi kusalokhu kuyinqubo yezingxenye zezimboni ezifuna ubuqotho besakhiwo, ukuzinza kwe-thermal, nokulinganisa okungabizi kakhulu—ikakhulukazi lapho amajiyometri ayinkimbinkimbi ehlangabezana nezimo zesevisi zokucindezela okukhulu. Kodwa hhayi wonke imboni ye-gravity sand casting iletha ukunemba kwe-dimensional okungaguquki, izici zensimbi eziphindaphindekayo, noma ukuqedwa kwe-on-spec ngaphezulu kwezingxenye ezibalulekile zemishini. Sibone izindlu eziningi kakhulu zamavalvu we-hydraulic zenqatshwa ngemva kokwelashwa kokushisa ngenxa yokushwabana kwe-porosity engabonakali. Silungise amaphutha esisekelo sephampu ngesikhathi somshini ngoba ukuqina kwesikhunta akuzange kuqinisekiswe ngaphambi kokuthululwa. Futhi silandele ukuguga ngaphambi kwesikhathi kuma-winch center shaft roller emuva ekusakazweni kwamanodule e-graphite—hhayi iphutha lika-opharetha, kodwa izikhala zokulandeleka kwempahla eluhlaza.
Kungani I-Gravity Sand Casting Isanqoba Ezingxenyeni Zezimboni Ezisebenza Kakhulu
Ukutshala izimali kudlula izakhi ze-aerospace ezinezindonga ezincane. I-Die casting ibusa izindlu ze-aluminium ezinevolumu ephezulu. Kodwa ukukhishwa kwesihlabathi esinamandla adonsela phansi kubamba indawo eyingqayizivele lapho isisindo sengxenye singaphezu kuka-50 kg, ukujiya kodonga kuyahluka ngalé kuka-25 mm, futhi ukukhetha kwengxubevange kuhlanganisa amamaki e-cobalt-nickel angagabi njenge-AMS 5387 noma i-T800. Lezi akuzona izinzuzo zethiyori. Ekusetshenzisweni komhlaba wangempela, indlu yesilinda sepompo ye-piston eyenziwe ngokusakazwa kwesihlabathi esinamandla adonsela phansi ifinyelela ukumelana nokukhathala okushisayo okungama-32% kunozakwabo wokutshala imali—ngoba ukuqinisa kancane kukhuthaza ukuhlukaniswa kwengalo ye-dendritic futhi kunciphisa ukuhlukaniswa okuncane kuma-superalloy asekelwe ku-Co-based. Kuyalinganiseka lokho. Kuyaphinda lokho. Kungakho ama-OEMs ezimoto zobunjiniyela ecacisa ukusakaza kwesihlabathi ngaphezu kwezinye zemishini yokuwina i-onboard esebenza emsebenzini oqhubekayo ongu-120°C.
Yini Ehlukanisa Imboni Ethembekile Ye-Gravity Sand Casting Kokunye
Izisekelo eziningi zilawula ukwakheka kwesihlabathi kanye nomswakama. Bambalwa abalawula uchungechunge olugcwele: ukuthola impahla eluhlaza eqinisekisiwe, imephu ye-mold compaction force, ukuqapha kwengcindezi ye-metallostatic ngesikhathi sangempela ngesikhathi sokuthela, nokuqinisekiswa kwe-post-cast microstructure ngokuhlaziywa kosayizi wokusanhlamvu kwe-ASTM E112. Esikhungweni sethu esithobela i-ISO e-Qingdao, iqoqo ngalinye lemibhobho ye-cobalt alloy iqala nge-T800 ingot eqinisekiswe kabili—eqinisekiswe ku-C, Cr, Ni, kanye nokuqukethwe kwe-Si ngokumelene nemibiko yokuhlolwa komshini *ngaphambi* kokuncibilika. Senza imephu yobulukhuni besikhunta kuwo wonke amaphoyinti angu-36 ku-cope ngayinye futhi sihudule sisebenzisa abahloli abalinganisiwe be-rebound—hhayi nje phakathi nendawo, kodwa emakhoneni lapho ama-gradient ashisayo abangela ukwanda okungalingani. Ngesikhathi sokuthulula, singena izinga lokushisa leladi njalo ngemizuzwana eyi-15 futhi silihlobanise nedatha ye-thermocouple eshumekwe emgodini wokukhunta. Akukho ukuqagela. Akukho ukucabanga "okujwayelekile komkhuba".
Lesi simiso sikhokha ngesivuno-kanye nokusebenza. Ezingxenyeni zephampu ze-AMS 5387, izinga lethu lokuthobela lesilinganiso sohlangothi lokuqala elimaphakathi limi ku-94.7%, likalwa ngokubiza kwe-GD&T emidwebeni ye-ASME Y14.5–2018. Akuyona inhlanhla leyo. Kungumphumela wokuhlanganisa ukulingisa kokulingisa (kusetshenziswa i-MAGMAsoft) ne-CNC fixture design—ngakho-ke izibonelelo zemishini ziqondana ngokunembile nama-vectors okuqiniswa okubikezelwe. Amakhasimende awakutholi “ubuxhwanguxhwangu.” Bathola ukufakwa komshini ngomshini phakathi kuka-±0.05 mm ezindaweni zokuvala ezibucayi—ngaphandle kokusebenza kabusha.
Lapho Ukukhiqiza Okuxubile Kuxazulula Izinkinga Zangempela
Abanye bathi ukulingisa isihlabathi kuphelelwe yisikhathi. Kodwa iqiniso lisitshela indaba ehlukile: amavalvu okucindezela athembeke kakhulu namuhla ahlanganisa imizimba ye-sand-cast enemigudu yokugeleza yangaphakathi eyenziwe ngomshini we-CNC kanye nezindawo zokuhlala ezigqoke i-laser. Lokho ukukhiqiza okuxubile-hhayi njenge-buzzword, kodwa njengesidingo. I-monolithic investment-cast valve body ingabamba ukubekezelela okuqinile, kodwa yehluleke ngaphansi kwezinga le-cyclic pressure ngenxa yokuthi ukwakheka kwayo okusanhlamvu ayinakho ukuqina kokuphuka kokusakazwa kwesihlabathi esipholisa okulawulwayo. Ngaleso sikhathi, okulingana ngokugcwele nomshini we-CNC kusuka kudoti yesitoko sebha 68% yezinto futhi kuthatha 3.2× isikhathi eside ukukhiqiza.
Siyalivala lelo gebe. Ukuhlanganiswa kwethu okuqondile kusho ithimba elifanayo eliqinisekisa umdwebo wakho ukuze ukwazi ukubumba futhi lihlela isikhungo sokugaya esinama-axis angu-5 esiqeda ibhore yangaphakathi yesisekelo sakho sephampu. Awekho ama-handoffs. Akukho ukulahlekelwa kokuhumusha. Lapho ikhasimende licela ipulaki ye-cobalt alloy engajwayelekile enokubekezela kokuphuma kwe-0.02 mm ebusweni obungu-120 mm OD, asizange sithi “akunakwenzeka.” Silungise i-core print geometry, sengeza ukulingisa indawo ebandayo, futhi sasebenzisa isilingo sevolumu ephansi ngokuhlola okushunyekiwe kwe-ultrasonic. Umphumela? Uziro wenqaba kumayunithi angama-240. Ilethwa ngezinsuku eziyi-18—hhayi amaviki ayi-12.
Ukukhetha Imboni Yakho Yokusakaza Isihlabathi Se-Gravity: Amasheke Amathathu Angaxoxiswana
Ngaphambi kokusayina i-NDA noma ukukhipha i-PO, buza le mibuzo—futhi ufune ubufakazi:
- Ungakwazi yini ukungibonisa amalogi okuhlola impahla angenayo ekota yokugcina yamaqoqo e-AMS 5387—okuhlanganisa nokuqinisekiswa kwe-spectrographic nemibiko yokuhlola eqinile? Uma bengabaza, hamba. Ukulandeleka akuyona into yokuzikhethela ekulingisini kwe-alloy ephezulu.
- Ingabe wenza ukuhlola okungaphakathi kwenqubo kokubunjwa kwesihlabathi esiluhlaza ngaphambi kokuthela—noma ekubumbeni okuqediwe kuphela? Ukuqinisekiswa kwezinga lesikhunta kubambezela ukungasebenzi ngaphambi kwesikhathi. Ukuthembela kuphela ekuhlolweni kokugcina kusho ukuchithwa, hhayi ukulungiswa.
- Ithini inqubo yakho ebhaliwe yokuqinisekisa i-microstructure homogeneity engxenyeni yogqinsi engu-400 mm? Izinga le-ASTM E3 lidinga ubuncane bezinkambu ezi-3 isampula ngayinye. Noma yini encane igeja ukuhlukaniswa kwebhande noma i-carbide.
QINGDAO QIANGSENYUAN TECHNOLOGY CO., LTD. yakha izingxenye zensimbi ezinembayo—hhayi nje ukulingisa. Yonke i-valve yokucindezela, yonke indlu yesilinda, yonke i-cobalt nozzle iqala ngenjongo ye-metallurgical futhi iphetha ngokuqinisekisa ukusebenza. Asikhiphi ikhwalithi. Siyinjiniyela ohlelweni—kusuka ekukhetheni okusanhlamvu kwesihlabathi kuya embikweni wokugcina we-CMM. Njengoba isidingo somhlaba sikhuphuka sokuqina, izingxenye zezimboni ezinengxubevange ephezulu, kwesokudla imboni ye-gravity sand casting ngeke nje ihlangabezane nemininingwane. Izolindela izindlela zokuhluleka, yenza lula uchungechunge lwakho lokunikezela, futhi ilethe izingxenye ezisebenzayo-umjikelezo emva komjikelezo, unyaka nonyaka.
