Lokacin da tsarin injin ku ya gaza ƙarƙashin matsin lamba 350-bar, ko bututun bututun cobalt-alloy ya fashe bayan awanni 47 na ci gaba da aiki, da wuya matsalar ta ta'allaka cikin ƙira. Yana zaune a cikin daidai sassa machining factory wanda ya fassara waɗannan zane-zane zuwa zahirin zahiri-inda microns ke raba aiki da gazawa.
Mun gan shi da hannu: wani OEM na Arewacin Amurka ya ƙi kuri'a guda uku na AMS 5387 piston famfo gidaje-ba don sun yi kuskure ba, amma saboda bayanan CMM sun nuna 0.012 mm axial runout a wurin zama. Wannan bai kai rabin kaurin gashin ɗan adam ba. Amma duk da haka wannan karkacewar ya haifar da lalacewa da wuri da dawo da filin. Gyaran ba a sake kunnawa ba - yana ƙarfafa sarrafa tsari a tushen: gano abubuwa da yawa, daidaitawar zafin jiki kafin yin aikin ƙarshe, da kayan aiki na ainihi na sa kayan aiki akan injina 5-axis. Wannan ba masana'anta ba ne. Wannan shine horo na juzu'i.
Me yasa hadadden alloy ke buƙatar haɗin kai tsaye-ba kawai damar CNC ba
Cobalt-nickel alloys kamar T800 da AMS 5387 ba su da hali kamar 6061 aluminum. Suna aiki da ƙarfi da ƙarfi, suna gudanar da zafi mara kyau, kuma suna buƙatar takamaiman sigogin yanke-har zuwa daidaitawar igiya da kusurwar isar da sanyaya. Shagon da kawai ke yin aikin CNC yakan fitar da simintin simintin gyare-gyare, sannan yana kokawa da ragowar damuwa yayin yankewa. Mun auna har zuwa 0.08 mm warpage a cikin yashi da aka jefar na CoCr gidaje bayan m machining kadai-isa ya kwashe wani $2,400 part.
Maganin ba inji mai sauri ba ne. Ana sarrafa mu'amala tsakanin matakai:
- Kayan aikin simintin gyare-gyare: Jadawalin maganin zafi da aka kulle zuwa jefa kuri'a lambobi-ba kwanakin kalanda ba
- Ci gaba da aikin injina: Amintaccen saman da aka kiyaye ta hanyar guje wa sarrafa na biyu; babu sake daidaitawa tsakanin juyawa, niƙa, da niƙa
- Sarkar kayan-zuwa-girma: Kowane danyen billet yana ɗaukar cikakkun rahotannin gwajin niƙa (ASTM E112 girman hatsi, ƙimar hadawar ASTM E1268) wanda aka ɗaure zuwa ID ɗin da ya gama.
Wannan shine dalilin da ya sa "masana'anta madaidaicin sassa" yana nufin wani abu daban lokacin da simintin gyare-gyare, gyare-gyare, da ingantaccen ƙarfe ke faruwa a ƙarƙashin rufin ɗaya-da kuma tsarin inganci ɗaya.
Inda GD&T ya daina zama na ka'ida-kuma ya fara ba da la'akari da aikin aiki
Abokan ciniki suna aiko mana da zane-zane tare da jurewar matsayi na ± 0.005 mm akan ƙwanƙwasa Ø12 mm, ko da kuwa fasalin yana zaune a cikin simintin ƙarfe na 300-mm ko 45-mm cobalt toshe. Wasu shagunan suna ɗaukar GD&T azaman jerin abubuwan dubawa. Muna dauke shi azaman taswirar samarwa.
Misali: abin nadi na tsakiya mara misali na winch tare da bores coaxial guda uku, kowanne yana buƙatar lokaci guda ikon sarrafa matsayi dangane da jirgin datum da aka yi masa injin nesa da nisan mm 200. Daidaitaccen aiki? Na'ura da datum farko, sa'an nan kuma juya sashin kuma sake kafa jeri. Amma matsananciyar zafi tsakanin saitin yana gabatar da kuskuren tarawa. Amsar mu: saitin 5-axis machining guda ɗaya ta amfani da na'urori masu ɗorewa na al'ada waɗanda ke riƙe duka saman datum da fasalulluka masu jujjuya - an tabbatar dasu tare da tracker laser kafin kowane yanke ya fara.
Wannan ba wuce gona da iri ba ne. Yana kawar da babban tushen bambance-bambance: fassarar ɗan adam na juriyar juriya.
Binciken ganowa za ku iya tantancewa-ba da'awar kawai ba
"Cikakken ganowa" yana bayyana akan kowane gidan yanar gizon mai kaya. Menene ya raba tabbataccen kisa da kwafin tallace-tallace?
A cikin kayan aikin mu na yarda da ISO, ganowa yana farawa da log ɗin narkewa-ba odar siye ba. Kowane batch na cobalt alloy yana ɗaukar:
- ID na musamman na tanderun da ke da alaƙa da binciken sinadarai (tabbacin ICP-OES)
- Hotunan tsarin hatsi daga sassan madaidaiciya
- Taswirar taurin kai a cikin ɓangaren giciye (ba kawai karatun saman ba)
- Daidaita tsakanin bayanan sake zagayowar maganin zafi da microhardness na ƙarshe a yankuna masu mahimmanci
Lokacin da wani mai yin famfo na Turai ya nemi cikakken ƙayyadaddun ƙayyadaddun ƙayyadaddun kayan aiki don jikin bawul ɗin AMS 5387 guda ɗaya, mun isar da shafuka 17—ciki har da jadawali na tarihin zafi, madaidaitan gwajin tensile, da rahoton binciken CMM da aka kwanan watan. Babu sake ginawa. Babu kimantawa. An adana bayanai kawai, an dawo dasu cikin ƙasa da mintuna 90.
Wannan matakin daftarin aiki ba ya faruwa ba tare da tsararrun ayyukan aiki na dijital ba - kuma ba tare da ɗaukar kowane bangare a matsayin mahimmin manufa ba, har ma a cikin ayyukan samfuri.
Madaidaicin ainihin duniya ba game da bugun sifili ba ne - game da sarrafa bambance-bambance ne
Ba a bayyana ma'auni ɗaya na gaskiya ba. Yana da daidaito na ƙetare sassa 500, a cikin makonni uku na samarwa, a tsakanin masu aiki daban-daban guda biyu. Muna bin kimar CpK-ba kawai sakamakon wucewa/ gazawa ba-don kowane mahimmin girma akan kowane ɓangaren juriya mai girma. Burin mu? CpK ≥ 1.67 akan duk fasalulluka inda aikin aiki ya dogara da amincin geometric.
Wannan horo yana ba mu damar tallafawa abokan ciniki waɗanda ke buƙatar fiye da sassa-suna buƙatar tsinkaya. Ko yana riƙe da ± 0.008 mm akan kujerar bawul ɗin matsa lamba wanda ke rufewa a mashaya 420, ko kiyaye ƙarancin ƙasa Ra ≤ 0.4 µm akan maƙarƙashiyar cobalt bututun ƙarfe wanda ke daidaita kwararar slurry mai lalacewa, burin ya kasance iri ɗaya: kawar da rashin tabbas kafin ya isa filin.
Idan aikace-aikacenku yana buƙatar kwanciyar hankali mai maimaitawa a cikin kayan aiki masu girma - kuma idan "kusa isa" yana haifar da ƙasa da ƙasa, abubuwan tsaro, ko da'awar garanti- to dama daidai sassa machining factory ba shine wanda ke da sabbin injuna ba. Ita ce wacce ke auna iyakokinta, tana rubuta kowane canji, kuma tana ɗaukar haƙuri a matsayin ƙaƙƙarfan rayayye-ba ƙima mai lamba akan bugu ba.
