Lapho onjiniyela becacisa a i-custom alloy machining factory, azigcini nje ngoku-oda izingxenye—zivikela ukuqina kobukhulu ngaphansi kwengcindezi ye-hydraulic yamabha angu-350, zimelana nokuqhunyiswa kwemibhobho ye-cobalt-alloy engu-650°C, noma ziqinisekisa ukuqhubeka kwe-microstructure kuyo yonke indawo yephampu yesihlabathi esizosebenza amahora angu-20,000 ngaphandle kokwehluleka. Lokho kuyiqiniso lokusebenza-hhayi isithembiso semininingwane.
Sibone amakhasimende ethumela imidwebo yezingxenye zephampu ye-cobalt ye-AMS 5387 ukuze athole izingxenye ezine-porosity engaphansi komhlaba ngemva kokwelashwa kokushisa. Abanye bacabanga ukuthi “i-CNC machined” isho ukuthi “ukulungele ukufaka”—kuze kube yilapho i-T800 alloy center shaft roller ihluleka ukuhlolwa kokudlidliza ngenxa yengcindezi engalawuleki eyinsalela evela kumaphasi okugaya asymmetric. Lawa akuwona amacala. Ziwumphumela oqondile wamakhono ahlukene: ukusakaza okwenziwa isitolo esisodwa, ukukhanda imishini ngesinye, ukuqeda ukugaya ngengxenye yesithathu—ngalinye linamasu ahlukene endlela yamathuluzi, ukuphatha okushisayo, kanye nenqubo yokuhlola.
Kungani ukuhlanganiswa okuqondile kungenakuzikhethela emsebenzini wokunemba kwe-alloy ephezulu
Ukulawula kwangempela kuqala ngaphambi kokuthi kundiza i-chip yokuqala. Kwa-QINGDAO QIANGSENYUAN TECHNOLOGY CO., LTD., isitifiketi sempahla eluhlaza akusona isinyathelo sokwenza amaphepha—kuyisisekelo. Yonke ikhoyili ye-T800 cobalt-based alloy ifika nemibiko yokuhlola yesigayo elandeleka enombolweni yokushisa, ukwakheka kwamakhemikhali kuqinisekiswe ngokumelene ne-ASTM E1086, nosayizi wokusanhlamvu oqinisekiswa nge-ASTM E112. Asiwamukeli ikhemistri "ejwayelekile". Sidinga ukuthobela kwe-AMS 5387 eqinisekisiwe—ikakhulukazi ezingxenyeni zephampu ezibalulekile lapho ukuhluka kwe-chromium ngenhla ±0.3% kubangela ukugqwala kwe-intergranular ngaphambi kwesikhathi ezindaweni zegesi emuncu.
Lokhu kuziphatha kuyaqhubeka ngenqubo. Ukufakwa kwesihlabathi kanye nokutshala imali kwenzeka endaweni—hhayi ephuma ngaphandle—ngakho silawula amazinga okushisa angaphambi kwesikhunta, ama-gradients okuqinisa, kanye nesikhathi sokunyakaza. Ukuchezuka okungu-2°C kumazinga okushisa esikhunta kushintsha isikhala sengalo ye-dendrite ngo-12%, kube nomthelela oqondile empilweni nempilo yokukhathala ezindlini zamasilinda wephampu ye-piston. Amaseli ethu e-CNC abe esesebenzisa ukuqinisekiswa kwe-CMM okusekucubunguleni ngemva kokudlula, ukuqeda kancane, nokuqeda—hhayi nje ukuhlola kokugcina. Sikala ukukhukhuleka okushisayo emishinini yama-axis amaningi njalo ngemizuzu engama-90 ngenxa yokuthi ukunwetshwa okungu-0.008 mm ezinguqukweni zezindlu eziphothayo kube nokugxila okungaphezu kwezindawo zokubekezelela i-GD&T.
Lapho ukugeleza komshini okujwayelekile kwehla khona-nokuthi yini esebenzayo ngempela
Abanye bangase baphikise ngokuthi noma isiphi isitolo esinesitifiketi se-ISO 9001 singaphatha ama-cobalt-nickel alloys uma sinikezwa amathuluzi afanele. Kodwa okuhlangenwe nakho komhlaba wangempela kusitshela indaba ehlukile. I-carbide evamile ifaka ukuphuka ngokushesha ku-AMS 5387 ngamanani okuphakelayo angaphezu kuka-0.05 mm/rev. Sisebenzisa amathuluzi anethiphu ye-PCD anegeometry yeraki enegethivu, isipholile esilethwa kubha engu-120 ngokusebenzisa amashaneli okuphotha angaphakathi, kanye nezindlela zamathuluzi eziguquguqukayo ezigcina ukugcwala kwe-chip okungashintshi—ngisho namakhontoyutha angu-3D afana nemizimba yamavalvu okucindezela anobukhulu obungu-4.2 mm kanye nezidingo zokuba flat ezingu-0.025 mm.
Ubuqotho bobuso bubaluleke kakhulu njengejometri. I-Mirror-finish Ra 0.2 µm ngeke ivimbele ukuqhekeka kwe-stress corrosion uma kukhona ama-microcracks angaphansi komhlaba ekukhethweni okungafanele kwesondo lokugaya. Ngokusakazwa kwensimbi engagqwali okusetshenziswa ezisekelweni zephampu yasogwini, sisebenzisa i-electropolishing *ngemuva* kokuvula isibhamu—hhayi ngaphambili—ukulondoloza ingcindezi eyinsalela ecindezelayo kuyilapho sizuza ukumelana nokugqwala nge-ASTM A967 ngayinye. Lokhu kulandelana akulona ithiyori. Iqinisekiswa ezindaweni zokukhiqiza zangempela, ngokuhlaziywa kwe-SEM yezigaba ezihlukene okuqinisekisa ukungabikho kokwakheka kongqimba olumhlophe.
Okusho ukuthi “isiko” ngempela ezinhlelweni ezibucayi zemishini
Okwezifiso akukona okumayelana nobukhulu obungajwayelekile kuphela. Imayelana nokuqondanisa ukusebenza. Lapho i-OEM yaseYurophu idinga ama-winch center shaft roller ezimotweni zobunjiniyela bezinga le-arctic, icacise ubulukhuni—kodwa ayizange ibale ubulukhuni bomthelela wezinga lokushisa eliphansi. Senze izivivinyo ze-Charpy V-notch ku--40°C ezinhlobonhlobo ezintathu ezilashwe ngokushisa, sancoma umjikelezo wokushisa oshintshiwe, futhi saletha amarola anamandla angu-42 J (hhayi nje u-27 J odingekayo). Leso sinqumo sinqande ukuphuka okungazelelwe ngesikhathi sokuguqulwa komthwalo kungazelelwe endaweni embozwe yiqhwa.
Leli zinga lokusebenzisana lidlulela ekudizayineni ukuze kwenziwe. Sihlaba umkhosi ama-callouts e-GD&T angqubuzana nama-engeli okusakaza asalungiswa. Silingisa ukuhlanekezela okushisayo kumabhomu engxubevange ye-cobalt enezindonga ezincane ngesikhathi sokudonsa isixazululo. Sinikeza impendulo yokwenziwa phakathi kwamahora angu-48—hhayi amaviki—ngoba i-prototype ibambezeleka idlulela emigqeni yesikhathi yokuqinisekisa inkambu. Abaphathi bethu bephrojekthi bakhuluma kahle i-ASME Y14.5, hhayi isiNgisi kuphela.
Uma udinga a i-custom alloy machining factory ephatha i-metallurgy njengobunjiniyela—hhayi ukuthengwa kwempahla—ufuna ukuhlangana okuqinile phakathi kwesayensi yezinto ezibonakalayo, ukucubungula okushisayo, nokulawula ukunyakaza okunembayo. Udinga ukulandeleka okubhaliwe kusuka kunombolo yokushisa ukuya kumbiko wokugcina wokuhlola. Udinga ozakwethu abasuse iphutha lepulagi ye-T800 alloy plug torque curves kuzo zonke izinhlobo eziyi-17 zesistimu ye-hydraulic. Udinga ukubulawa okuqinisekisiwe-hhayi nje izitatimende zekhono. Yilokho umkhawulo lapho ukucaciswa kuphela khona nokusebenza kuqala.
