Ka’idar auna zafin jiki na billet shigar da dumama makera

Ƙimar ma’aunin zafin jiki na Billet: A lokacin aikin dumama, ana auna ma’aunin zafin jikin billet ɗin ta ramin murɗa a gefe. Gwargwadon ma’aunin zafin jiki na fuska yana fuskantar fuskar billet ta wannan ramin. Auna ma’aunin zafin jiki na gani ya dogara ne akan farfajiyar akwati da kuzarinsa. Ga kowane kayan da ke buƙatar zafi, ana daidaita potentiometer da aka haɗa da auna kai ta gwaje -gwaje da yawa da ma’aunin kwatancen. Manufar ita ce gano karkacewa tsakanin ainihin zafin jiki da ƙimar auna ƙima. Domin auna ma’aunin zafin jiki na gani ya dogara ne akan farfajiyar akwati, kuma tsawon lokacin da billet ɗin ke tsayawa a yanayin zafi zai haifar da sikelin oxide a farfajiya, wanda zai samar da kumfa bayan dogon lokaci kuma a ƙarshe ya faɗi. Zazzabi na wannan Layer na kumfa ya yi ƙasa da zafin jikin billet, yana haifar da kurakurai a ma’aunin zafin jiki.

A saboda wannan dalili, ana busar da nitrogen a cikin ramukan da ke kan murfin don hana iskar oxygen a cikin iskar da ke kewaye ta yi tasiri a saman allon gidan a yankin ma’aunin ma’auni. Amfani da iskar nitrogen kusan 20L/h ne don lissafin da aka samar da “farantin shigar dumama”. Fuskar takardar tana jujjuyawa zuwa Injin naushi kuma yayin aiwatar da naushi, sannan a cikin aikin fitar da shi daga injin bugun. Za a fallasa yanayin da ke kewaye. Sabili da haka, an samar da sikelin sikelin oxide akan farfajiyar akwati. Don cire sikelin oxide, an shigar da bututun iskar da aka matsa a ƙarƙashin “tanderun wutar ƙarfe na ƙarfe”. Lokacin caji, bututun yana hura iskar da aka matsa akan saman takardar don cire sikelin oxide mai ɗorewa akan matsayin ma’aunin zafin jikin billet ɗin kuma matsa shi. Buƙatar iskar tana da kusan 45m3/h, shugaban auna ma’aunin zafin jiki, ma’aunin zafin da aka auna yana yin rikodin ta mai rikodin zafin jiki. Lokacin da zafin dumama ya wuce matsakaicin matsakaicin zafin da aka kayyade, an katse wutar lantarki na inductor don tabbatar da cewa billet ɗin bai yi zafi ba; lokacin da zazzabin billet ya yi ƙasa da ƙayyadadden zafin jiki, ana kunna wutan lantarki na inductor ta atomatik. Yin aiki da tanderun “dumama”: Ga akwatunan ƙarfe na Magnetic waɗanda ke da haɗari ga fasa, lokacin da aka yi zafi a zafin jiki a ƙasa da ma’anar Curie, saurin dumama yana da sauri. Domin hana fasa fasa a cikin takarda, ƙaramin ƙarfi ne kawai za a iya amfani da shi don aiki. Lokacin da zafin dumama ya wuce zafin zafin Curie point, ƙarfin inductor yana raguwa, kuma saurin dumama akwati yana da jinkiri. Dole ne a ƙara ƙarfin lantarki a kan inductor don ƙona billet ɗin zuwa zafin zafin extrusion da ake buƙata tare da babban iko.