Lokacin da injiniyoyi ke buƙatar ƙarfin masana'anta na allura na ƙananan ƙarfe don sassa ƙasa da 5 mm tare da ± 0.01 mm haƙuri, da wuya su fara da binciken Google. Suna farawa da samfurin da ya gaza - cobalt alloy bututun ƙarfe wanda ya fashe yayin gwajin matsa lamba na ruwa, famfo mahalli wanda ya ɓace daga zagaye bayan maganin zafi, ko abin nadi na cibiyar winch wanda ya sa ba daidai ba bayan sa'o'i 200 a cikin yanayin teku mai cike da gishiri. Mun ga duka ukun - kuma mun gyara kowane ɗayan ba ta hanyar daidaita juriya ba, amma ta hanyar sake tunani yadda daidaitattun ƙananan masana'anta ke gadar rata tsakanin ƙarfe na foda da amincin aiki.
Tsarin allura na ƙarfe ba kawai "ƙaramin MIM" ba - yana buƙatar sarrafa ƙarfe a ma'aunin micron.
Gaskiya micro karfe allura gyare-gyare (μMIM) ya bambanta da daidaitattun MIM a cikin hanyoyi guda uku waɗanda ba za a iya sasantawa ba: girman rabon foda dole ne ya kasance ƙarƙashin 5 μm D.90, Cire ɗaure yana buƙatar bayanin martabar yanayin zafi don hana ƙananan fashewa a cikin bangon bakin ciki (<0.3 mm), kuma sintering dole ne a cimma ≥98.5% ka'idar yawa ba tare da coarsing hatsi. Yawancin masu ba da kaya suna lakafta sassan a matsayin "micro" idan suna ƙarƙashin 10 g - amma ainihin sassan μMIM suna auna 0.05-2.5 g da fasali kamar tashoshi mai sanyaya diamita 0.15 mm, kaurin bango 0.08 mm, da kiran GD&T don matsayi na gaskiya a cikin 0.005 mm.
Abin da ya sa zaɓin kayan abu ba na zaɓi ba ne - shine yanke shawara na farko na injiniya. AMS 5387 cobalt alloy yana aiki inda bakin karfe 316 ya gaza: a cikin yanayin slurry mai ƙarfi, a yanayin aiki na 450°C, ƙarƙashin nauyin gajiyar keken keke wanda ya wuce hawan keke 10⁷. Amma tsarin sa mai kyau yana sa shi rashin yafewa yayin ƙaddamarwa. Muna amfani da tsari mai kaushi/zazzabi mai matakai biyu tare da sa ido kan asarar yawan jama'a na ainihi - ba ƙayyadaddun zagayowar lokaci ba - saboda bambancin tsari-zuwa-tsari a ƙimar yaɗuwar ɗaure kai tsaye yana tasiri ga amincin ɓangaren kore.
Haɗin kai tsaye yana warware abin da fitar waje ke karya
Yawancin gazawar μMIM suna komawa zuwa ga abin da aka kashe: jiragen ruwa masu kawo kayayyaki na MIM sun ɓata babura; kantin sayar da kayan aiki yana gwagwarmaya tare da aikin aiki a kan flanges diamita 3-mm; mai kula da zafi ba zai iya yin kwafin ainihin madaidaicin haɓakawa da ake buƙata don watsawar carbide na AMS 5387 ba. Muna gudanar da dukkan matakai guda uku a ƙarƙashin rufin da aka tabbatar da ISO 9001 a Qingdao - kuma hakan yana canza komai.
- CNC machining yana amfani da injina 5-axis tare da kayan aiki na rayuwa da bincike cikin aiki - mai mahimmanci lokacin fuskantar flange mai kauri 0.2 mm tare da ± 0.003 mm flatness
- Maganin zafi ya haɗa da vacuum carburizing don abubuwan tushen T800, tare da matsi na ɓangaren oxygen sarrafawa zuwa <10⁻ mbar don hana iskar shakawar iskar shaka a kan hadaddun kwantena
- Ƙarshen saman saman yana amfani da gyare-gyaren lantarki tare da taswira mai yawa na yanzu zuwa lissafi na gida - babu sasanninta makafi, babu ƙananan ramuka a cikin hanyoyin gudana.
Ba mu riƙe haƙuri kawai ba. Muna riƙe da * aiki * haƙuri: rashin ƙarfi na saman Ra ≤ 0.2 μm akan fuskokin rufewa, daidaiton micro-hardness a cikin sassan giciye na 0.5 mm, da bayanan bayanan damuwa da aka tabbatar ta hanyar diffraction XRD - ba kawai taurin Rockwell C cak ba.
Zane-don-ƙera yana farawa kafin a ajiye fayil ɗin CAD na farko
Abokan ciniki sukan tambayi: "Za ku iya yin wannan?" Mun amsa: "Ee - amma kawai idan muka daidaita radius a nan, matsar da wurin ƙofar zuwa wurin, kuma muka ƙayyade yanayi na daban." Misali, filogi na cobalt tare da zaren ciki na 0.4 mm ya gaza akai-akai har sai da muka canza daga zaren ciki bayan-sinter zuwa zaren-forming yayin aikin kore-jahar machining - sannan a yi amfani da nitriding mai ƙarancin zafin jiki maimakon taurin al'ada. Wannan canjin ya rage raguwar raguwa daga 37% zuwa 1.8%.
Muna tabbatar da kowane zane don yuwuwar μMIM - bincika kusurwoyi (mafi ƙarancin 0.5 °), guje wa sasanninta masu kaifi (R ≥ 0.1 mm), tabbatar da jujjuyawar kauri na bango (ba> 3: 1 rabo), da ƙirar ɗaure kwarara don tsinkayar layin walda a cikin gidajen famfo mai katanga. Idan GD&T ɗin ku ya kira matsayi mai haɗe-haɗe akan datum uku da aka raba su mm 2, za mu ba da alama - kuma za mu ba da shawarar dabarar datum mai sararin sama wanda ke ba da sakamako iri ɗaya tare da ƙarancin dubawa 40%.
Ba a auna amincin a cikin takaddun shaida - an gina shi cikin kowane yanki
Ganowa ba aikin takarda ba ne. Lambobin laser-etched da yawa akan kowane bangare, takaddun shaida da ke da alaƙa da gudanar da kowane mutum, da rahoton CMM da aka adana na shekaru 15 - ba kawai don tantancewa ba, amma don haka lokacin da rahoton abokin ciniki ke sawa a cikin sa'o'in aiki na 12,000, za mu iya ja madaidaicin rajistan kula da zafi, rikodin rikodi na batch, da duban interferometry na gani daga ranar samarwa.
Masana'antar allurar mu ta ƙirar ƙarfe tana ba da sabis na OEM na ruwa a cikin Jamus waɗanda ke buƙatar takaddun shaida EN 10204 3.1, ƴan kwangilar filayen mai a Texas waɗanda ke buƙatar yarda da API Q1, da masu zanen famfo a cikin Singapore suna buƙatar ingantaccen ingantaccen saman saman ASME BPE. Abin da ya haɗa su ba labarin ƙasa ba ne - ƙi yarda da "isasshen kyau" akan sassan da ke hatimi, mita, ko jujjuya ƙarƙashin nauyi mai mahimmancin rayuwa.
Idan ƙaramin ɓangaren aikin ku na gaba ya ƙunshi alloys na cobalt, bangon sirara na juriya, ko saman aiki waɗanda dole ne su tsira daga kafofin watsa labarai masu lalata - fara da halayen kayan aiki, ba ƙayyadaddun na'ura ba. Fara da ikon mallakar tsari, ba saurin faɗin magana ba. Fara da abokin tarayya wanda ke kula da kowane karkatacciyar 0.02 mm azaman binciken tushen tushen, ba waigewa ba. Wannan shine yadda daidaito ya zama abin tsinkaya.
