Lokacin da gidan famfo na hydraulic ya kasa ƙarƙashin matsin lamba 350-bar, ko cobalt alloy bututun ƙarfe ya fashe bayan sa'o'i 200 a cikin sabis na iskar gas mai tsami, tushen tushen da wuya ƙira ne - daidai ne. Ba wai kawai “haƙurin haƙura ba,” amma daidaiton girma a cikin kewayar yanayin zafi, daidaitaccen tsarin microstructural ta sassa mai kauri, da amincin saman da ke tsayayya da zaizayar ƙasa yayin da yake riƙe da hatimin lissafi. Shi ya sa injiniyoyin da ke samo sassan ƙarfe masu mahimmancin manufa ba sa nemo “masu samar da siminti.” Suna neman a high ainihin simintin gyaran kafa factory-wanda ke daukar karfe, injina, da dubawa a matsayin nau'ikan da ba za a iya raba su ba.
Me yasa "Maɗaukakin Maɗaukaki" Ba Ƙarshen Talla ba ne kawai - Ƙimar Tsari
Yawancin kafuwar suna sarrafa raguwar simintin gyare-gyare a cikin ± 1.5 mm a kowace 100 mm. Ma'aikatar simintin gyare-gyare na gaskiya tana riƙe da ± 0.15 mm akan mahimman abubuwan datum - har ma akan simintin ƙarfe mai nauyin kilogiram 45 tare da bambancin bango 12-mm. yaya? Ta hanyar kulle sauye-sauyen tsari kafin a zubo: ƙayyadaddun ƙima wanda aka auna a cikin kPa, bayanan martaba na warkewa da aka inganta kowane tsari, da simintin gating da aka tabbatar akan ainihin lokacin cika (ba a ƙididdige shi ba). Mun ga abokan ciniki sun ƙi ɓangarorin ba don ƙarancin gani ba, amma saboda binciken CMM ya bayyana 8-µm ragowar damuwa na damuwa bayan jiyya na zafi-hargitsin da ba a iya gani ga ido ko caliper, duk da haka ya isa ya canza canjin wurin zama ta hanyar 0.003 °. Wannan shine inda daidaito ya ƙare kuma dogara ya fara.
Ƙarfi huɗu waɗanda ke Rarraba Simintin Madaidaicin Madaidaici daga Daidaitaccen Aikin Kafa
Babban ma'aikatar simintin gyare-gyare ba kawai simintin gyare-gyare ba. Ya mallaki cikakken sarkar-daga zaɓin gami zuwa ingantaccen aiki. Ga abin da hakan ke nufi a aikace:
- Cobalt-nickel Mastery-ba kawai sarrafa AMS 5387 ba, amma tsinkayar halayensa. T800 alloy ba "mai wuyar inji ba." Yana da rashin kwanciyar hankali sama da 650 ° C. Don haka muna preheat gyare-gyare zuwa 220 ° C ± 5 ° C, simintin sanyi a ≤1.2 ° C / min a cikin tanderun yanayi mai sarrafawa, da tsara jadawalin CNC roughing kafin tashin hankali na ƙarshe. Tsallake kowane mataki yana haifar da ƙananan ƙwayoyin cuta waɗanda ke nunawa kawai yayin gwajin hydrostatic.
- Haɗin kai tsaye wanda ke hana tari juriya. Lokacin da gidan silinda famfo na piston yana buƙatar 0.01 mm cylindricity akan 280-mm diamita * da * 0.05 mm matsayi na haƙuri don zaren M12 guda shida dangane da wannan ƙuri'a, fitar da simintin gyare-gyare, mashin ɗin, da kammala garantin drift. Mun jefa, inji, zafi-magana, da kuma gama a daya makaman — ta yin amfani da guda CMM daidaitawa domin shigowa dubawa da karshe saki.
- Ƙirƙirar GD&T-ba fassarar fassarar ba. Abokan ciniki suna aiko mana da kwafi tare da kiran ASME Y14.5-2018: “|POSITION|0.02|A|B|C|.” Ba mu tambayi "Menene wannan yake nufi?" Muna yin taswirar kowane datum zuwa kayan aiki na zahiri, yin kwatankwacin cire kayan abu mafi muni, da rigingimun tuta *kafin* tsara kayan aiki. Wani abokin ciniki na Turai ya ceci $210K a cikin sake yin aiki ta hanyar kama madaidaicin datum B yayin bita na masana'antar mu-makonni uku kafin zub da ƙarfe na farko.
- Abubuwan ganowa waɗanda ke farawa da takaddun shaida-ba lambobi ba. Kowane zafi na cobalt gami yana zuwa tare da cikakken bincike na yanayi, rahoton girman hatsi, da bayanan gwajin tensile. Muna shigar da shi cikin tsarin mu, mu danganta shi zuwa ga jefa kuri'a, sa'an nan kuma ɗaure wannan kuri'a zuwa kowane lambar ɓangaren da aka yi. Idan tushen famfo ya gaza a sa'o'in aiki 15,000, muna sake gina tarihin gabaɗayan: narke kwanan wata, zub da zazzabi, ƙimar sanyaya, karatun taurin, har ma da ID ɗin mai aiki wanda ya gudanar da binciken CMM na ƙarshe.
Haƙiƙan Kuɗin Simintin “Mai Kyau Mai Kyau”—Kuma Me Ya sa Ba Ya Rahusa
Wasu masu siye suna kwatanta ƙididdiga bisa farashin naúrar kaɗai. Amma la'akari da wannan: $480 cobalt alloy toshe simintin zuwa ± 0.5 mm yana kashe 37% ƙasa da gaba fiye da wanda aka riƙe zuwa ± 0.12 mm. Duk da haka ɓangaren sassauƙa yana buƙatar ƙarin wucewar injin 2.3, yana haifar da ƙarin lalacewa na kayan aiki 41%, kuma yana da ƙimar juzu'i mafi girma na 22% yayin gwaji na ƙarshe. Jimlar farashin ƙasa? $612. Mafi muni, faɗuwar filin yana haifar da da'awar garanti mai matsakaicin 4.7 × kashi na farashi-da kuma lalacewar amana cewa babu ragi da ya dawo. Madaidaici ba ƙari ba ne. Yana da tushe don aikin da ake iya faɗi.
Zaɓan Masana'antar Simintin Kayayyakin Kayayyakin Kayayyakin Kayayyakin Kayayyakin Kayayyakin Kayayyakin Kayayyakin Kayayyakin Kayayyakin Kayayyakin Kayayyakin Kayayyakin Kayayyakin Kayayyakin Kayayyakin Kayayyakin Kayayyakin Kayayyakin Kayayyakin Kayayyakin Kayayyakin Kayayyakin Kayayyakin Kayayyakin Kayayyakin Kayayyakin Kayayaki)
Kafin sanya hannu kan NDA, tabbatar da waɗannan-ba a cikin ƙasidu ba, amma a cikin shaidar bene na kanti:
- Tambayi rahotannin CMM akan kuri'a uku na kwanan nan na lissafi iri ɗaya. Nemo daidaitattun daidaitattun daidaito-ba kawai "a cikin ƙayyadaddun bayanai ba." Yaduwar ± 0.005 mm a cikin ma'auni 20 yana gaya muku fiye da tambarin fasfo/ gaza guda ɗaya.
- Nemi ƙaramin juzu'i na ƙaramin simintin gyare-gyare. Tsarin hatsi yakamata ya zama iri ɗaya, tazarar hannu dendrite mai ƙarfi da jagora-ba bazuwar ko keɓe ba. Porosity dole ne ya zama mai siffar zobe kuma ya keɓanta, ba zai taɓa haɗuwa ba.
- Kula da aikin su na GD&T. Kalli yadda suka kafa hadadden sashi akan CMM. Shin suna amfani da hawan kinematic? Shin suna tabbatar da daidaitawar binciken *kafin* dubawa? Idan sun tsallake ko wannensu, jurewar ku bisa ka'ida ce.
Ba a samun dogaro ta hanyar ƙarfafa bayanai. An gina shi ta hanyar fahimtar yadda narkakkar ƙarfe ke gudana, yadda allunan ke ba da amsa ga ma'aunin zafi, da kuma yadda sojojin injiniyoyi ke mu'amala da ƙananan simintin gyare-gyare. QINGDAO QIANGSENYUAN TECHNOLOGY CO., LTD. tana aiki azaman babban masana'anta na simintin simintin gyare-gyare saboda kowane yanke shawara-daga girman yashi zuwa girman RPM-an yi shi ne don kawar da sauye-sauye, ba sarrafa shi ba. Ayyukansu yana bayyana a cikin famfunan ruwa suna tura ruwan teku a zurfin mita 1,200, manyan igiyoyin winch suna ɗaga kayan aikin injiniya ton 42, da bawuloli masu daidaita kwararar hydrogen a cikin tashoshin mai da sifiri. Daidaiton ba shine burinsu ba. Nahawun su ne. Kuma a cikin manyan sassa na ƙarfe, nahawu yana ƙayyade ko tsarin yana gudana-ko ya gaza.
