Masu kera na'urorin likitanci suna fuskantar shuru amma mai mahimmanci: ɓangarorin da suka yi kamanni akan takarda sun gaza ƙarƙashin zagayowar haifuwa ta zahiri, ƙarfin ruwa, ko maimaita damuwa na inji. Mun gan shi sau biyu a wannan shekara-Cobalt-alloy valve gidaje masu fashewa bayan 12,000 autoclave cycles; bakin karfe famfo karshen iyakoki warping a 150 psi yayin gwajin aiki. Tushen dalili? Ba ƙira ba. Ba darajar kayan abu ba. Daidaitaccen simintin gyare-gyare ne don aiwatar da masana'antar na'urorin likitanci-inda microns ke yanke hukunci tsakanin amincewar tsari da sake tsarawa.
Me yasa Simintin Zuba Jari ya gaza Lokacin da Ma'aunin Likita ya Aiwatar
Yawancin masana'antun suna ɗaukar simintin gyare-gyare na likitanci a matsayin "ƙananan haƙuri." Ba su ba. ASTM F136 titanium ko AMS 5387 cobalt alloy suna buƙatar daidaiton ƙarfe * a cikin kowane milimita * na kauri - ba kawai ƙarewar saman ba. A cikin binciken mu uku na ƙarshe na abubuwan simintin simintin mai siyarwa, 68% ya gaza tabbatar da ƙirar ƙirar ƙira: tazarar hannun dendrite a waje ±0.5 µm, rabuwar carbide kusa da shigarwar ƙofa, ko gungu na porosity wanda ya fi 50 µm a cikin yankuna masu ɗaukar kaya. Waɗannan ba lahani ba ne na kwaskwarima. Suna haifar da fashewar gajiya a kashi 40% na rayuwar sake zagayowar da aka ƙididdige su.
Mun daina karɓar takaddun “as-cast” shekaru da suka gabata. Yanzu muna buƙatar cikakken yanayin ganowa: lambar zafi, zub da log ɗin zafin jiki, ƙayyadaddun ƙimar ƙimar ƙarfi, da tarihin zafi bayan-zurfin-har ma don samfura. Me yasa? Saboda karkacewar 3°C a cikin zafin zafin jiki yayin harba harsashi na saka hannun jari yana canza ragowar rarraba damuwa da kashi 17%, yana tasiri kai tsaye da kwanciyar hankali bayan kammala CNC.
Hudu Marasa Tattaunawa a cikin Simintin Madaidaicin Matsayin Likita
Daidaitaccen simintin gyare-gyare na gaskiya don ƙarfin masana'anta na na'urorin likita ba game da kayan aiki ba ne - game da horon tsari ne. Ga abin da ke raba tabbatattun abokan hulɗa da masu samar da kasida:
- Mutuncin Abu Na Farko: Raw stock dole ne ya dauki cikakken certs niƙa-ba kawai daraja, amma ainihin sunadarai (misali, Co-29Cr-6Mo tare da ≤0.02% N, tabbatar da OES), size size (ASTM E112 ≥5), da tensile data kowane zafi. Babu ware.
- Matsakaicin Sarrafa Bayan GD&T: Ingancin CMM akan *kore-jihar* harsashi kafin ɓata lokaci ya kama gyaɗar ƙura da wuri. Muna auna ma'auni mai mahimmanci a zurfin uku - ba kawai a saman ba - kuma muna ƙi duk wani simintin gyare-gyare inda bambancin kaurin bango ya wuce ± 0.15 mm sama da tsayin 50 mm.
- Ingancin saman da ke tsira da wucewa: Ra ≤0.8 µm ba na tilas ba ne. Rougher saman tarko chlorides a lokacin nitric acid passivation, haddasa pitting lalata a cikin saline muhallin. Muna tabbatar da ƙarewar ƙasa *kafin* da *bayan* maganin sinadarai-ba kawai bayan machining ba.
- Bambance-bambancen Sifiri: Kowane bangare yana samun lambar QR mai lamba Laser mai haɗawa da tagwayen sa na dijital: ƙyalli mai yawa, sigogin simintin gyare-gyare, taswirar zagayowar yanayin zafi, rahotannin dubawa, da taswirar girma na ƙarshe. Masu duba FDA suna buƙatar wannan-ba sau ɗaya ba, amma akai-akai.
Inda Haɓaka Manufacturing Ya Warware Matsaloli na Gaskiya
Wasu injiniyoyi suna ɗaukan simintin ya ƙare a shakeout. Amma kayan aikin likitanci suna buƙatar matakan aiki na matasan. Yi la'akari da bututun ƙarfe na cobalt na T800 don injector mai dacewa da MRI: jefar da simintin saka hannun jari don hadaddun hanyoyin kwarara na ciki, sannan CNC-machined don ± 0.01 mm maida hankali akan madaidaicin 1.2 mm, sannan ta hanyar lantarki zuwa Ra 0.2 µm. Yi shi duka a wuri ɗaya-ko haɗarin murdiya ta zafi yayin canja wuri.
Mun yanke farashin datti da kashi 42% tun lokacin da aka haɗa simintin gyare-gyare, jiyya mai zafi, da ƙarewa a ƙarƙashin rufin da aka tabbatar da ISO 13485 guda ɗaya. Me yasa? Domin masu aikin tanderun mu suna daidaita lokutan jiƙa bisa ainihin adadin yawan simintin gyare-gyare-ba nauyi na ka'ida ba. Masana injinan mu suna daidaita hanyoyin kayan aiki ta amfani da ra'ayin CMM na ainihin lokaci daga simintin simintin da ya gabata. Wannan ba inganci ba ne. Ƙirƙirar ilimin lissafi ne.
Abokan ciniki waɗanda suka yi ƙoƙarin raba waɗannan matakan a cikin dillalai suna ba da rahoton gazawar guda biyu masu daidaituwa: rashin daidaituwa bayan sauƙaƙe damuwa (wanda ya haifar da ƙimar sanyaya mara daidaituwa), da sake gurɓata ƙasa kafin tsaftacewa ta ƙarshe (daga sarrafawa yayin jigilar kayan aiki).
Zaɓin Simintin Madaidaicin ku don Abokin Masana'antar Na'urorin Likita
Yi waɗannan tambayoyin-sannan a tabbatar da amsoshi tare da shaida:
- Za a iya nuna mani simintin gyare-gyare uku na ƙarshe da aka ƙi? Ba kawai yanayin gazawar ba-amma tushen tushen bincike, aikin gyara, da kuma yadda kuka tabbatar yana aiki?
- Kuna yin nazarin ƙa'idar ƙarfe akan * kowane * zafi samarwa - ko lokacin cancanta kawai?
- Menene madaidaicin kauri na sashin da aka yarda da shi don AMS 5387 ba tare da ƙarancin layin tsakiya ba? Kuma ta yaya kuke tabbatar da shi ga kowane kuri'a?
- Lokacin da muka aika zanen GD&T tare da kiran matsayi na gaskiya akan ramukan makafi, kuna fara fara kwatancen cika alamu-ko inji da bege?
Idan amsar ita ce "muna bin daidaitattun ayyuka," tafiya. Na'urorin likitanci ba su yarda da daidaitaccen aiki ba. Suna buƙatar daftarin aiki, maimaituwa, ƙididdige simintin gyare-gyare don aiwatar da masana'antar na'urorin likitanci-inda kowane micron yana da shaida, kowane zafi yana da labari, kuma kowane sashi yana jigilar kaya tare da rikodin binciken sa.
QINGDAO QIANGSENYUAN TECHNOLOGY CO., LTD. yana gina wannan damar - ba a matsayin da'awar talla ba, amma a matsayin gaskiyar aiki na yau da kullun. Kayan aikinsu mai yarda da ISO a cikin Qingdao yana ɗaukar allunan cobalt-nickel, bakin karfe, da simintin ƙarfe na musamman tare da haɗaɗɗen simintin ƙarfe, injina, da gamawa-duk ana iya gano su zuwa ɗanyen zafi. Ba wai kawai sun haɗu da ASTM F899 ko ISO 13485 ba. Suna yin injiniya a kusa da iyakokin su.
Gaba na masana'antu ne waɗanda ke ɗaukar simintin gyare-gyare ba a matsayin mataki ba-amma a matsayin tushe. Inda ƙarfe, lissafi, da aiki ke haɗuwa kafin guntu na farko ya tashi. Wannan shine madaidaicin simintin aikin masana'antar na'urorin likitanci wanda baya wuce dubawa kawai. Yana hana gazawa.
