Ƙirƙirar Hanyar dumama

Gabaɗaya, ƙirƙira dumama wanda adadin asarar ƙonewa shine 0.5% ko ƙasa da haka shine ƙarancin dumama oxidative, kuma dumama wanda adadin asarar kona shine 0.1% ko ƙasa da haka ana kiransa dumama mara ƙarfi. Ƙananan dumama-free hadawan abu da iskar shaka zai iya rage karfe hadawan abu da iskar shaka da kuma decarburization, da kuma iya muhimmanci inganta surface ingancin da girma daidaito na forgings da kuma rage mold lalacewa. Fasahar dumama mara ƙarancin iskar iskar shaka wata fasaha ce mai goyan baya don ƙirƙira madaidaicin ƙirƙira. A halin yanzu, har yanzu wannan fasaha ba ta gudanar da aikin bincike da yawa a kasar Sin ba.

 

Akwai hanyoyi da yawa don cimma ƙarancin dumama mara amfani da iskar shaka. Hanyoyin da aka saba amfani da su da kuma haɓakawa cikin sauri sune ɗumama sauri, matsakaicin kariya dumama da ƙarancin dumama harshen wuta.bangaren injina

 

-, saurin dumama

Dumama cikin sauri ya haɗa da saurin dumama da jujjuya saurin dumama, dumama wutar lantarki, da tuntuɓar dumama wutar lantarki a cikin tanderun wuta. Tushen ka'idar don saurin dumama shine cewa lokacin da babu ruwan ƙarfe ya yi zafi a gwargwadon yuwuwar dumamar yanayi, babban matsayi na damuwa na zafin jiki, saura damuwa da damuwa na nama da aka haifar a cikin billet ɗin bai isa ya haifar da tsagewar billet ba. Ana iya amfani da wannan hanyar don ƙananan ƙananan ƙarfe na carbon ingots da blanks don ƙirƙira gabaɗaya na siffofi masu sauƙi. Tun da hanyar da ke sama tana da ƙimar dumama mai girma, lokacin dumama yana da ɗan gajeren lokaci, kuma oxide Layer da aka kafa a saman billet yana da bakin ciki, don haka manufar oxidation kadan ne.

Lokacin shigar da dumama, adadin kona karfe yana kusan 0.5%. Don cimma buƙatun babu dumama oxidation, ana iya shigar da iskar gas mai karewa a cikin tanderun dumama induction. Shi dai iskar kariya shi ne iskar da ba ta da amfani kamar nitrogen, argon, helium ko makamantansu, da kuma rage iskar gas kamar cakudewar CO da H2, wanda aka tanada musamman ta hanyar samar da iskar gas mai kariya.cnc

Tun da saurin dumama yana raguwa sosai lokacin dumama, ƙimar decarburization za a iya ragewa sosai yayin da rage iskar shaka, wanda ya bambanta da ƙarancin zafi mai zafi, wanda shine ɗayan manyan fa'idodin dumama da sauri.bangaren filastik

 

2, ruwa matsakaicin kariya dumama

 

Kafofin watsa labarai na kariyar ruwa gama gari sune narkakkar gilashi, narkakken gishiri, da makamantansu. Dumin tanderun wankan gishiri da aka kwatanta a sashe na farko na Babi na 2 nau'in dumama kariya ce ta ruwa.

 

Hoto na 2-24 yana nuna nau'in turawa tanderun wanka na gilashi mai ci gaba. A cikin sashin dumama tanderun, an narkar da gilashi mai zafi mai zafi a cikin kasan tanderun, kuma billet ɗin yana dumama bayan an ci gaba da tura shi ta cikin ruwan gilashin. Saboda kariyar ruwan gilashin, billet ɗin ba ya da iskar oxygen yayin aikin dumama, kuma bayan an fitar da billet daga ruwan gilashin, saman yana kan saman. An haɗa shi da fim ɗin gilashin bakin ciki, ba wai kawai yana hana oxidation na biyu na billet ba, har ma yana sa shi a lokacin ƙirƙira. Wannan hanyar tana da sauri da daidaituwa a cikin dumama, tana da kyawawan iskar shaka da tasirin decarburization, kuma yana da sauƙin aiki, kuma hanya ce mai ban sha'awa wacce ba ta da iskar oxygen.
3, m matsakaici kariya dumama (shafi kariya dumama)

 

Ana amfani da sutura na musamman a saman sararin samaniya. Lokacin da zafi, murfin ya narke don samar da fim mai yawa da iska. An haɗa shi da ƙarfi zuwa saman babur don keɓe sarari daga iskar iskar tanderu mai iskar oxygen don hana iskar oxygenation. Bayan an fitar da billet ɗin, murfin zai iya hana iskar oxygenation na biyu kuma yana da tasirin hana zafi, wanda zai iya hana faɗuwar zafin jiki na billet kuma yana iya aiki azaman mai mai yayin ƙirƙira.

 

An raba suturar kariya zuwa gilashin gilashi, gilashin yumbura gilashi, gilashin ƙarfe na gilashi, murfin ƙarfe, kayan haɗin gwiwa, da makamantansu bisa ga tsarinsa. Mafi yawan amfani da shi shine murfin gilashi.

 

Gilashin rufi shine dakatarwa na wani abun da ke ciki na foda gilashi, da ƙaramin adadin stabilizer, ɗaure da ruwa. Kafin yin amfani da shi, ya kamata a tsabtace fuskar da ba ta da kyau ta hanyar yashi, da dai sauransu, don haka za a iya haɗawa da rufin rufin da blank. Ana amfani da sutura ta hanyar tsoma, murfin goga, feshin bindiga da feshin lantarki. Ana buƙatar sutura ya zama iri ɗaya. Kaurin ya dace. Yawanci, shi ne 0.15 zuwa 0.25 mm. Idan rufin ya yi kauri sosai, yana da sauƙi a cire shi, kuma yana da bakin ciki sosai don kare shi. Bayan an rufe shi, a dabi'a an bushe shi a cikin iska sannan a sanya shi a cikin tanda mai bushewa mai ƙarancin zafi don bushewa. Hakanan yana yiwuwa a yi preheat ɗin billet zuwa kusan 120 ° C kafin a shafa, ta yadda rigar foda ta bushe nan da nan bayan an shafa shi, kuma ya manne da kyau a saman babur. Za'a iya yin dumama pre-forging bayan an bushe murfin.

 

Domin samar da kariya mai kyau da lubrication na gilashin kariya na gilashi, ya kamata a narke mai kyau da kyau, danko da sinadarai. Lokacin da nau'ikan rarraba nau'ikan gilashin ya bambanta, abubuwan da ke sama na zahiri da sinadarai sun bambanta. Sabili da haka, amfani ya dogara da nau'in kayan ƙarfe da matakin ƙirƙira zafin jiki. Zabi abubuwan gilashin da suka dace.

 

An yi amfani da hanyar dumama rufin rufin gilashin ko'ina a cikin samar da gami na titanium, bakin karfe da ingantattun ingantattun jiragen sama a China.